Changes in the most recent releases of Ghostscript

## Table of contents

> - Version 6.0 (2000-02-03)
>   - Documentation, Procedures, Utilities, Drivers, Platforms, Fonts, PDF writer, Interpreter (PDF), Interpreter, Streams, Library
> - Version 5.99 (beta) (1999-12-18)
>   - Incompatible changes, Documentation, Procedures, Utilities, Drivers, Platforms, Fonts, PDF writer, Interpreter (PDF), Interpreter, Streams, Library
> - Version 5.98 (beta) (1999-12-01)
>   - Incompatible changes, Documentation, Procedures, Utilities, Drivers, Fonts, PDF writer, Interpreter (PDF), Interpreter, Streams, Library
> - Version 5.97 (beta) (11/22/99)
>   - Incompatible changes, Documentation, Procedures, Utilities, Drivers, Platforms, PDF writer, Interpreter, Library
> - Version 5.96 (beta) (11/12/99)
>   - Incompatible changes, Documentation, Procedures, Utilities, Drivers, Platforms, PDF writer, Interpreter (PDF), Interpreter, Streams, Library
> - Version 5.95 (beta) (11/1/99)
>   - Incompatible changes, Documentation, Procedures, Utilities, Drivers, Platforms, Fonts, PDF writer, Interpreter (PDF), Interpreter, Library
> - Version 5.94 (beta) (9/30/99)
>   - Incompatible changes, Documentation, Procedures, Utilities, Drivers, Platforms, Fonts, PDF writer, Interpreter (PDF), Interpreter, Streams, Library
> - Version 5.93 (beta) (9/11/99)
>   - Incompatible changes, Documentation, Procedures, Utilities, Drivers, Platforms, PDF writer, Interpreter (PDF), Interpreter, Streams, Library
> - Version 5.92 (beta) (9/2/99)
>   - Documentation, Procedures, Utilities, Drivers, PDF writer, Interpreter, Streams
> - Version 5.91 (beta) (8/30/99)
>   - Documentation, Utilities, Drivers, Platforms, Fonts, PDF writer, Library
> - Version 5.90 (beta) (8/20/99)
>   - Incompatible changes, Documentation, Procedures, Utilities, Drivers, Platforms, Fonts, PDF writer, Interpreter (PDF), Interpreter, Streams, Library
> - (Version 5.89 deliberately omitted.)
> - Version 5.88 (tester) (8/3/99)
>   - Incompatible changes, Documentation, Procedures, Drivers, Platforms, Fonts, Interpreter (PDF), Interpreter, Streams, Library
> - Version 5.87 (tester) (6/29/99)
>   - Incompatible changes, Documentation, Procedures, Drivers, Interpreter (PDF), Interpreter, Library
> - Version 5.86 (tester) (6/14/99)
>   - Incompatible changes, Documentation, Procedures, Utilities, Drivers, Platforms, Fonts, Interpreter (PDF), Interpreter, Streams, Library
> - Version 5.85 (tester) (5/29/99)
>   - Incompatible changes, Documentation, Procedures, Utilities, Drivers, Interpreter (PDF), Interpreter, Library
> - Version 5.84 (tester) (5/19/99)
>   - Incompatible changes, Procedures, Utilities, Drivers, Platforms, Interpreter, Streams, Library
> - Version 5.83 (tester) (5/13/99)
>   - Incompatible changes, Documentation, Procedures, Utilities, Interpreter, Library
> - Version 5.82 (tester) (4/24/99)
>   - Incompatible changes, Documentation, Procedures, Utilities, Drivers, Platforms, Interpreter (PDF), Interpreter, Library
> - Version 5.81 (tester) (4/14/99)
>   - Incompatible changes, Procedures, Utilities, Drivers, Fonts, Platforms, Interpreter (PDF), Interpreter, Library
> - Version 5.80 (tester) (4/6/99)
>   - Incompatible changes, Procedures, Utilities, Drivers, Fonts, Platforms, Interpreter, Interpreter (PDF), Streams, Library
> - (Versions 5.74 - 5.79 deliberately omitted.)
> - Version 5.73 (tester) (3/19/99)
>   - Incompatible changes, Documentation, Procedures, Drivers, Interpreter, Library
> - Version 5.72 (tester) (3/17/99)
>   - Incompatible changes, Documentation, Procedures, Utilities, Drivers, Fonts, Interpreter, Interpreter (PDF), Streams, Library
> - Version 5.71 (tester) (3/3/99)
>   - Incompatible changes, Documentation, Procedures, Utilities, Drivers, Fonts, Interpreter, Interpreter (PDF), Streams, Library
> - Version 5.70 (internal) (2/20/99)
>   - Incompatible changes, Documentation, Procedures, Utilities, Drivers, Fonts, Interpreter, Interpreter (PDF), Streams, Library
> - Version 5.69 (internal) (2/4/99)
>   - Procedures, Utilities, Drivers, Interpreter, Streams, Library
> - Version 5.68 (internal) (1/29/99)
>   - Incompatible changes, Documentation, Procedures, Utilities, Drivers, Fonts, Platforms, Interpreter, Streams, Library
> - Version 5.67 (internal) (1/8/99)
>   - Incompatible changes, Documentation, Procedures, Utilities, Drivers, Fonts, Interpreter, Interpreter (PDF), Streams, Library
> - Version 5.66 (internal) (11/25/98)
>   - Incompatible changes, Documentation, Procedures, Utilities, Drivers, Platforms, Interpreter, Interpreter (PDF), Streams, Library
> - Version 5.65 (internal) (11/13/98)
>   - Incompatible changes, Documentation, Procedures, Utilities, Drivers, Platforms, Interpreter, Interpreter (PDF), Library
> - Version 5.64 (internal) (11/5/98)
>   - Incompatible changes, Documentation, Procedures, Drivers, Library
> - Version 5.63 (internal) (11/4/98)
>   - Incompatible changes, Documentation, Procedures, Drivers, Interpreter, Library
> - Version 5.62 (internal) (10/31/98)
>   - Incompatible changes, Documentation, Drivers, Interpreter, Library
> - Version 5.61 (internal) (10/28/98)
>   - Documentation, Procedures, Utilities, Drivers, Interpreter (PDF), Streams, Library
> - Version 5.60 (internal) (10/18/98)
>   - Incompatible changes, Documentation, Procedures, Utilities, Drivers, Platforms, Interpreter, Interpreter (PDF), Streams, Library

This document is a record of changes in Ghostscript releases numbered 5.60 through 5.9x. For earlier versions, see the the history documents:

> History of Ghostscript versions 5.0 - 5.50
> History of Ghostscript versions 4.n
> History of Ghostscript versions 3.n
> History of Ghostscript versions 2.n
> History of Ghostscript versions 1.n

For other information, see the Ghostscript overview.

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    Within each release, news appears in the following order: Incompatible
    changes, Documentation, Procedures, Utilities, Drivers, Platforms, Fonts,
    PDF writer (included under Drivers through fileset 5.88), Interpreter,
    Streams (included under Interpreter through release 2.9.9), Library.
    Changes marked with a * were made available as patches to a previous
    release.

    Version 6.0 (2000-02-03)

    This is the first public release since 5.50.  See doc/Current.htm for
    information about new capabilities and known problems.

    Documentation

    Documents the fact that the plane_depths of a gx_image_enum structure may
    vary, and that planes_wanted procedure of a gx_image_enum must return false
    if the depths *or* widths can change.  (gxiparam.h)

    Documents the fact that a wanted plane's wanted status, width, or depth can
    only be changed by a call of plane_data that provides data for that plane.
    (gxiparam.h)

    Documents the change in the handling of the pthreads library.
    (doc/Make.htm)

    Documents the fact that setting parameters for the DCTEncode filter in
    ps2pdf causes a crash.  (doc/Ps2pdf.htm)

    Documents another bug in the MIPSpro 7.x / IRIX 6.5.x compilers, with
    isave.c.  (doc/Make.htm)

    Corrects Russell Lang's e-mail address.  (doc/New-user.htm)

    Documents the new image operator test file and the pdfeof file.
    (doc/Psfiles.htm)

    Documents the 'w' argument for image_render procedures.  (gxiclass.h)

    Adds a little more checking to the release process.  (doc/Release.htm)

    Documents the return values from the font build_char procedure.  (gxfont.h)

    Documents the fact that the free 'zip' program is needed to build the
    self-extracting Windows executable, as well as WinZipSE.  (doc/Make.htm,
    msvc32.mak, winint.mak)

    Adds references to several new free fonts.  (doc/Fonts.htm)

    Documents an important invariant for streams.  (stream.h)

    Adds a reference for user-supported Watcom / GNU make makefiles.
    (doc/Make.htm, doc/New-user.htm)

    Documents the dependence of gs_ttf.ps on some of the gs_*_e.ps files.
    (lib/gs_ttf.ps)

    Documents how to make self-extracting Windows executables.
    (doc/Release.htm)

    Adds a number of new user-contributed man pages.  (unixinst.mak, man/gslp.1,
    man/wftopfa.1, man/printafm.1, man/pfbtopfa.1, man/font2c.1, man/dvipdf.1,
    man/ps2pdfwr.1, man/gsnd.1, man/pf2afm.1, man/ps2pdf.1)

    Procedures

    Fixes problems:
    	- Building on BSDI didn't work.  The simplest way to fix this was to
    change the linking of the pthreads library on Unix platforms to be included
    in STDLIBS rather than the "sync" implementation. (fix contributed by a
    user) (lib.mak, unix-gcc.mak, unixansi.mak, unixtrad.mak)
    	- Once again, some runtime files weren't installed.  (unixinst.mak)
    	- Building the self-extracting executable didn't work.  (winint.mak)

    Updates the user-contributed all-architectures makefile.  (all-arch.mak)

    Utilities

    Fixes problems:
    	- A needed #include was missing.  (geninit.c)
    	- There were signed/unsigned char mismatches.  (genht.c, geninit.c)
    	- The MacOS compiler imposes a 32K limit on the size of a stack
    frame: we changed the code to use malloc/free.  (geninit.c)

    Removes an unnecessary variable.  (echogs.c)

    Adds a file that attempts to test the image operators exhaustively.
    (lib/image-qa.ps, unixinst.mak)

    Enhances the prfont.ps utility to print CIDFonts.  (lib/prfont.ps)

    Adds a utility file that patches the PDF interpreter to allow garbage after
    the %%EOF (or the %%EOF to be missing completely).  (lib/pdfeof.ps)

    Drivers

    Fixes problems:
    	- The X driver compared too many bits of color value, leading to
    unnecessary halftoning.  (bug introduced by a fix in 5.99) (gdevxcmp.c)
    	- Output from the pswrite driver got a dictfull error on Level 1
    printers.  (gdevps.c)
    	- Anti-aliasing had stopped working on MS Windows and OS/2. (bug
    probably introduced in 5.65) (gdevmswn.c, gdevpm.c)

    Platforms

    Adds a conditional definition of PTHREAD_CREATE_DETACHED for old versions of
    the pthreads library.  (gp_psync.c)

    Updates the Microsoft Visual C++ library makefile for VC++ 6.  (msvclib.mak)

    Updates some copyright dates.  (winint.mak, dwsetup.rc)

    Fonts

    Updates the URW fonts to include the expanded Adobe character set, including
    many Eastern European accented characters.  (doc/New-user.htm)

    Removes a 'readonly' that inconvenienced the authors of ttf2pf.
    (lib/gs_ttf.ps)

    PDF writer

    Fixes problems:
    	- The Dest key was deleted from GoTo and GoToR link annotation
    pdfmarks.  (gdevpdfm.c)
    	- {name} references were substituted even in stream data for the
    /PUT pdfmark.  (gdevpdfm.c)
    	- The revision number was sometimes printed incorrectly if its
    fraction part was zero.  (gdevpdf.c)
    	- Embedded Multiple Master font instances weren't identified as
    MMType1 rather than Type1.  (gdevpdff.h, gdevpdff.c, gdevpdft.c, gdevpdfw.c)
    	- The test against MaxSubsetPct was incorrect when the percentages
    were equal.  (gdevpdfw.c)
    	- Font registrations weren't removed when the device was closed.
    (gdevpdff.h, gdevpdfx.h, gdevpdff.c, gdevpdfw.c)
    	- Multiple /OBJ pdfmarks with the same name caused an error.  For
    Distiller compatibility, we now allow this if the type is the same, even
    though the pdfmark specification doesn't say anything about this being
    legal.  (gdevpdfm.c)

    Removes an unnecessary variable.  (gdevpdff.c, gdevpdfr.c)

    Disables embedding Multiple Master font instances, since Acrobat Reader
    doesn't accept what appear to be correct output and we don't have time
    before the release to track down the problem.  (gdevpdft.c)

    Interpreter (PDF)

    Factors some code to allow patching the PDF reader to allow garbage after
    the %%EOF (or the %%EOF to be missing completely).  (lib/pdf_main.ps)

    Interpreter

    Fixes problems:
    	- Type 1 fonts with non-standard OtherSubrs had stopped working.
    (bug introduced since 5.60) (zchar1.c)
    	- usecmap didn't work.  (lib/gs_cmap.ps)
    	- The glyph_info procedure for Type 1 fonts didn't take Metrics[2]
    or CDevProc into account.  (zchar1.c, zfont1.c)
    	- The multiple-data-source case of images was broken. (bug
    introduced in 5.99) (zimage.c)
    	- If a page device Install procedure caused an error, things could
    be left in an inconsistent state.  (lib/gs_setpd.ps)
    	- Using a DeviceN color space could access uninitialized data in a
    color value.  (zcsdevn.c)
    	- DeviceN images with procedure data sources were broken.
    (zimage.c)
    	- Images with a procedure data source could terminate prematurely if
    their processing was interrupted.  (zimage.c)
    	- The garbage collector only marked half the name table sub-tables,
    and attempted to mark an equal number of invalid pointers, leading to
    invalid accesses or memory corruption.  (iname.c)

    Removes an unused variable.  (zmisc.c)

    Streams

    Fixes problems:
    	- sgets didn't reset the cursor pointers, so sgets into a client
    buffer followed by sseek (for some kinds of streams, including files) could
    get confused.  (stream.c)

    Library

    Fixes problems:
    	- A 'const' qualifier was omitted, leading to a type mismatch.
    (gxclrast.c)
    	- The revision number was sometimes printed incorrectly if its
    fraction part was zero.  (gsmisc.c)
    	- gs_image_next returned the wrong value in *pused if it incremented
    the plane number.  (bug introduced in 5.99) (gsimage.c)
    	- Only the last of the data_x and raster values in the local
    'planes' array in gs_image_next_planes were initialized.  (bug introduced in
    5.99) (gsimage.c)
    	- The multiple-data-source case of images was broken. (bug
    introduced in 5.99) (gsimage.h, gsimage.c)
    	- ImageType 3 images with unequal scaling for the mask and data
    didn't work.  (We thought they once did, but it appears they never have.)
    (gximage3.c)
    	- Images with 12-bit samples treated a Decode entry of [1 0] the
    same as [0 1].  (Other, general Decode entries worked correctly.)
    (gxipixel.c)
    	- ImageType 3 images didn't work if processing was ever interrupted
    for remapping a color.  (gximage3.c)
    	- Images in DeviceN color spaces with 12-bit samples didn't work.
    (gxi12bit.c, gxidata.c)
    	- Images in DeviceN color spaces could fail to render properly
    because the interruption of rendering left a half-built entry in an internal
    cache.  (gxi12bit.c, gxicolor.c)
    	- Images with non-idempotent RasterOps in 1-component DeviceN color
    spaces didn't render properly, because the same pixel was rendered multiple
    times after a color remapping interruption.  (gximono.c)
    	- The fast case of masked images caused a crash if invoked without
    an imager state.  (gximono.c)
    	- Flushing buffered image data could cause coordinate bookkeeping
    to get out of sync.  (gxidata.c)
    	- ImageType 3, InterleaveType 2 images sometimes failed to render
    the last row.  (gximage3.c)
    	- The fix in 5.88 for resizing large objects had a bug itself.
    (gsalloc.c)
    	- Whan banding, if a client supplied more data than necessary for an
    image, the client was told (incorrectly) that all of the data was used.
    (fix from Artifex) (gxclimag.c)
    	- Null patterns caused a crash. (bug probably introduced by changes
    to support PatternType 2) (gspcolor.c)
    	- On hand-initialized memory devices where line_ptrs[0] != base,
    monobit RasterOps could cause invalid or stray memory accesses.  (gdevmr1.c)

    Removes an unnecessary variable.  (gdevppla.c, gsfont.c)

    Adds the ability to call a specified procedure when unregistering
    notification, needed for removing PDF font registrations.  (gsnotify.h,
    gsnotify.c)

    Updates the copyright year.  (gscdef.c)

    Version 5.99 (beta) (1999-12-18)

    Incompatible changes

    (Procedures)
    	- All platform-specific makefiles must now define the Q macro.
    	- Ghostscript now exits with an error status if an error occurs in a
    file named on the command line, a -c command, or piped input.
    (Utilities)
    	- ps2epsi now disables setpagedevice: the bounding box of the EPSI
    output file is recorded only in the %%BoundingBox comment.
    (Drivers)
    	- The return type of gdev_vector_close_file is changed from void
    to int.
    (Interpreter)
    	- The name of the predefined stochastic halftone is changed to
    StochasticDefault.  (This change was actually made in 5.98.)
    	- The compht feature is replaced by stocht.
    	- Font searching now looks in FontResourceDir.
    	- The ASCIIHexEncode filter now produces upper-case output.
    (Library)
    	- The type returned by compiled halftone resource access procedures
    is changed.

    Documentation

    Fixes problems:
    	- A stray character had gotten added to the beginning of a file.
    (doc/Use.htm)
    	- Many minor HTML errors had crept in.  (doc/*.htm, doc/gsdoc.el)

    Updates the docmentation on the mswinpr2 driver.  (doc/Devices.htm)

    Notes that GNU make currently does not work on OpenVMS.  (doc/Make.htm)

    Documents the fact that x/y_pixels_per_inch are deprecated.  (gxdevcli.h)

    Documents certain bugs in ps2pdf.  (doc/Ps2pdf.htm)

    Documents the addition of FontResourceDir to the font search process.
    (doc/Use.htm)

    Documents the new arrangement for B paper sizes.  (doc/Psfiles.htm,
    doc/Use.htm, doc/gs-vms.hlp, man/gs.1)

    Removes the "under development" warning from the text API and
    get_bits_rectangle documentation, and adds a little more detail.
    (doc/Drivers.htm)

    Adds new user-contributed documentation for installing and using Ghostscript
    fonts with X Windows.  (doc/Fonts.htm, doc/Readme.htm, doc/Use.htm)

    Adds building with the Watcom compiler to the release process.
    (doc/Release.htm)

    Adds an "Improving performance" section to the user documentation.
    (doc/Use.htm)

    Adds a note to the C style guide about order of evaluation.
    (doc/C-style.htm)

    Documents the new stocht.ps file.  (doc/Psfiles.htm)

    Procedures

    Fixes problems:
    	- A missing dependency caused builds on certain platforms to fail.
    (int.mak)
    	- $(EXP) was missing before various utility invocations.  (int.mak)
    	- VMS converts all unquoted arguments to lower case.  In order to
    work around this, we have added a platform-specific makefile macro Q, which
    is defined as a quote mark on VMS and as an empty string on all other
    platforms, and used it to quote the few mixed-case values in the makefiles.
    We removed the obsolete QQ macro from os2.mak as well.  (cfonts.mak,
    dvx-head.mak, int.mak, openvms.mak, openvms.mmk, os2.mak, unixhead.mak,
    wccommon.mak, winlib.mak)
    	- PSRCDIR was incorrectly referenced as PNGSRCDIR in one place.
    (all-arch.mak)
    	- winint.mak had a conditional that Watcom's make program didn't
    accept.  (winint.mak)

    Adds a makefile entry to allow compilation with libpng 1.0.5.  (libpng.mak)

    Updates the Borland C++ makefile to work with C++Builder 4.  (bcwin32.mak)

    Updates the Unix installation makefile to install stocht.ps.  (unixinst.mak)

    Utilities

    Fixes problems:
    	- ps2epsi didn't disable setpagedevice.  (lib/ps2epsi)
    	- geninit needed  for 'exit'.  (geninit.c)
    	- Some invocations of utilities didn't deal with VMS's habit of
    converting arguments to lower case.  (geninit.c, cfonts.mak)
    	- The ps2pdf*.bat files didn't produce a usage message if no
    arguments were provided.  (lib/ps2pdf.bat, lib/ps2pdf12.bat,
    lib/ps2pdf13.bat)
    	- Removes some warnings from the Windows uninstaller.
    (dwuninst.cpp)

    Upgrades the halftone compiler to handle Type 5 halftones.  (genht.c)

    Makes the initialization string compiler recognize sections of the code
    where binary tokens are allowed, and convert literal hex strings within such
    sections to binary-token strings, which take less space and load faster.
    (geninit.c)

    Adds a utility file to define b0 ... b6 as selecting JIS B paper sizes.
    (unixinst.mak, lib/jispaper.ps)

    Modifies the font printing utility to sort unencoded characters.
    (lib/prfont.ps)

    Adds a small utility to help use the StochasticDefault halftone.
    (lib/stocht.ps)

    Drivers

    Fixes problems:
    	- The output of the epswrite driver couldn't be embedded in another
    file, because it assumed it was invoked with an empty operand stack.
    (gdevps.c)
    	- "Vector" drivers didn't detect I/O errors such as filling up the
    disk.  (gdevvec.h, gdevpdf.c, gdevps.c, gdevpx.c, gdevvec.c)
    	- The bookkeeping for image color spaces when banding was incorrect,
    possibly causing memory access errors.  (gxclist.h, gxclimag.c, gxclist.c)
    	- The cljet5 driver didn't place the image on the page correctly.
    (gdevclj.c)
    	- 16-bit X11 devices with R/G/B widths other than 5/6/5 sometimes
    failed to map colors correctly.  (gdevxcmp.h, gdevxcmp.c)
    	- The cljet5c driver omitted a needed cast.  (gdevcljc.c)

    Adds new x11rg16x and x11rg32x devices to test X Windows with unusual pixel
    layout.  (devs.mak, gdevxalt.c)

    Works around a bug in Acrobat Distiller 4 (and perhaps some other PostScript
    interpreters) that causes an error if CCITTFaxDecode with /EndOfBlock = true
    is given data with no EOB (terminated by the end of the data stream
    instead).  (gdevps.c)

    Platforms

    Fixes problems:
    	- The absence of mktemp on the Watcom platform caused a linking
    error under Windows.  (watc.mak, watcw32.mak, gp_iwatc.c, gp_mktmp.c)

    Fonts

    Fixes problems:
    	- findfont, /Font resourcestatus, and /Font resourceforall weren't
    consistent.  (lib/gs_fonts.ps, lib/gs_res.ps)
    	- Very large TrueType fonts caused a stackoverflow.  (lib/gs_ttf.ps)

    PDF writer

    Fixes problems:
    	- Errors in pdfmark and setdistillerparams were ignored (!).
    (lib/gs_pdfwr.ps)
    	- The PUT pdfmark didn't allow adding dictionaries to stream-type
    objects.  (The pdfmark documentation says this isn't allowed, but we think
    this is an oversight, since it is reasonable and unambiguous and Acrobat
    Distiller allows it.)  (gdevpdfm.c)
    	- The token scanner used to substitute object names in pdfmark
    parameters sometimes added an extra character on the end.  (gdevpdfr.c)
    	- ashow and [a]widthshow produced incorrect text spacing.  (bug
    introduced by an optimization in 5.97) (gdevpdft.c)
    	- setdistillerparams left its argument on the stack.
    (lib/gs_pdfwr.ps)
    	- 0-height images caused errors either at conversion or at rendering
    time.  (gdevpdfi.c)
    	- If the FontMatrix included a translation component, text was
    positioned incorrectly.  NOTE: this fix may not handle x/y/xyshow.
    (gdevpdft.c)
    	- Out-of-range user-space coordinates could get generated for
    rectangles.  NOTE: they can still get generated for general paths.
    (gdevpdfd.c)
    	- Widths weren't written for renamed built-in fonts.  We fixed this
    partly by improving the algorithm for recognizing built-in fonts.
    (gdevpdff.h, gdevpdff.c, gdevpdft.c)

    Works around the Acrobat limitation that user-space coordinates must not
    exceed 32K.  (fix from Artifex) (gdevpdfp.c)

    Works around an Acrobat Reader 3 bug with printing files including Type 3
    fonts: with the "Download Fonts Once" option, AR3 only emits the font subset
    referenced on the first page where the font appears.  (gdevpdfx.h,
    gdevpdf.c, gdevpdft.c)

    Interpreter (PDF)

    Fixes problems:
    	- Type 3 fonts weren't handled properly as a marking context, so if
    a CharProc referenced a resource in the font, an error would occur.
    (lib/pdf_fonts.ps)
    	- 0-height images caused an error.  (lib/pdf_draw.ps)

    Interpreter

    Fixes problems:
    	- Errors weren't propagated properly.  (bug introduced in 5.98 by
    enhanced error recovery code) (imainarg.h, gs.c, imainarg.c)
    	- Errors in -c commands or in files named on the command line
    sometimes allowed execution to continue, and did not terminate with an
    abnormal status.  (lib/gs_init.ps)

    Changes the binary token scanner so that if the stream buffer is in foreign
    space, binary-token strings will not be copied, but will be referenced
    directly in the buffer.  This parallels what is done for name strings.
    (iscanbin.c)

    Changes the stochastic halftone from multiple Type 3s to a Type 5.
    (lib/ht_ccsto.ps, int.mak)

    Replaces the compht feature with a new feature called stocht.  If this
    feature is selected, the StochasticDefault halftone resource will be
    pre-loaded into Ghostscript.  If COMPILE_INITS=1, all the halftone data
    (threshold array, order and bits arrays) will be efficiently compiled into
    the executable.  (int.mak)

    Replaces (...\n) print with (...) = everywhere.  (lib/gs_cmdl.ps,
    lib/gs_fonts.ps, lib/gs_init.ps, lib/gs_setpd.ps, lib/pdf_base.ps,
    lib/pdf_font.ps, lib/pdf_main.ps, lib/pdf_sec.ps)

    Adds support for JIS B paper sizes: statusdict will now include isob0..6 and
    jisb0..6 operators, with b0..6 normally aliased to the former.
    (lib/gs_statd.ps, lib/jispaper.ps)

    Adds a b5tray procedure; limits the valid arguments for setpagetype to the
    Adobe-defined values 0 and 1.  (lib/gs_statd.ps)

    Updates clients for the change in the gs_image_* API.  (zimage.c)

    Makes the default halftone lookup procedure more reasonable.
    (lib/gs_init.ps, lib/gs_ll3.ps)

    Streams

    Fixes problems:
    	- An error condition when closing a file stream wasn't reported
    properly.  (sfxfd.c, sfxstdio.c)

    For greater Adobe compatibility, changes the ASCIIHexEncode filter to
    produce upper-case output.  (sstring.c)

    Library

    Fixes problems:
    	- The gs_image_* API didn't work for ImageType 3 images.  Fixing
    this required a small (but backward-compatible) API change.  (fix mostly
    provided by Artifex)  (gsimage.h, gsimage.c)
    	- The change in the bbox device in 5.95 broke it for the case where
    it was being used in a pipeline.  (gdevbbox.c)
    	- A possible overflow wasn't detected when stroking lines with very
    large coordinates.  (gxstroke.c)
    	- A mask was sized incorrectly.  (gsdcolor.h)

    Updates the runtime support for compiled halftones.  (gxdhtres.h, gscdefs.h,
    gconf.c, gxclrast.c, gxhtbit.c)

    Replaces all references to the now-deprecated x/y_pixels_per_inch with
    HWResolution[0/1].  (gsdevice.c, gxclist.c, gxpcmap.c)

    Version 5.98 (beta) (1999-12-01)

    Incompatible changes

    (Library)
    	- The return type of init_proc is changed from void to int.
    	- The return types of gs_lib_init* are changed from void to int.
    (Interpreter)
    	- The return types of gs_[main_]init*, gs_[main_]add_lib_path,
    gs_[main_]set_lib_paths, and a number of internal initialization-related
    procedures are changed from void to int.

    Documentation

    Improves the documentation of the clist_render_rectangle procedure.
    (gxclist.h)

    Makes it clear that pre-public-release filesets should not be redistributed.
    (doc/Tester.htm)

    Clarifies that the parameters for the X driver are command line switches,
    not X resources.  (doc/Use.htm)

    Improves the documentation of ps2pdf in response to some user comments.
    (doc/Ps2pdf.htm)

    Documents the initial settings of the distiller parameters.
    (doc/Ps2pdf.htm)

    Documents the UniqueIDs assigned to Aladdin.  (lib/gs_fonts.ps)

    Updates the documentation for the stochastic halftone mask.  (doc/Make.htm)

    Removes some obsolete material.  (doc/Release.htm)

    Procedures

    Fixes problems:
    	- The new ps2pdf* scripts weren't included in the Unix install list.
    (unixinst.mak)
    	- The directory names were missing in BEGINFILES.  (openvms.mak)
    	- The .pl and .sh scripts weren't included in the Unix install list.
    (unixinst.mak)

    Updates all-arch.mak with a newer version from its contributor.
    (all-arch.mak)

    Updates the makefiles for a change in eexec modularization.  (devs.mak,
    int.mak, lib.mak)

    Utilities

    Fixes problems:
    	- The dvipdf usage message was incorrect.  (lib/dvipdf)

    Adds a utility for mechanically adding the Adobe extended Latin characters
    (primarily Central European accented letters) to a font.  Eventually we
    would like to integrate this into the font loader and/or make extended
    versions of the standard 35 fonts.  (lib/addxchar.ps)

    Drivers

    Fixes problems:
    	- psdf_sorted_glyphs_include didn't handle empty lists correctly.
    (gdevpsdf.c)
    	- A reference to a #defined constant hadn't been converted to upper
    case.  (gdevpsdf.h)
    	- Acrobat Reader couldn't handle <> as the definition of Notice in
    an embedded font's FontInfo dictionary: it requires a () string.
    (gdevpsd1.c)
    	- The [e]pswrite driver didn't take stroked paths into account when
    computing the bounding box.  (gdevps.c)

    Updates gdevwpr2.c with a new version from its most recent author.
    (gdevwpr2.c)

    Fonts

    Fixes problems:
    	- The FONTPATH file scanner wasn't protected against errors.
    (lib/gs_fonts.ps)
    	- Some badly designed Chinese TrueType fonts, whose 'post' table
    gives the name .null to all glyphs, didn't work properly.  (lib/gs_ttf.ps)
    	- The shareware Katakana font had an incorrect UniqueID.
    (fonts/fkarw.gsf)

    Adds all of the PostScript 3 fonts to the intelligent substitution tables.
    (lib/gs_fonts.ps)

    Changes the FONTPATH scanner to allow a %%BeginFont: line as the first line
    of a font.  Nothing in Adobe's documentation suggests that this is
    acceptable, but some fonts have it.  (lib/gs_fonts.ps)

    Releases an updated set of the URW fonts, fixing the braceleftbt problem in
    the Symbol font and a couple of missing characters in the ZapfDingbats
    fonts, and adding the Euro glyph to the alphabetic fonts.  The new archive
    also includes fonts.scale and fonts.dir files for use with X Windows
    (mkfontdir and xfs).

    Centralizes the definition of Aladdin's XUIDs.  (lib/gs_fonts.ps,
    lib/gs_ttf.ps)

    PDF writer

    Fixes problems:
    	- The algorithm for making font names unique didn't take subset
    prefixes into account.  (gdevpdff.h, gdevpdff.c, gdevpdfw.c)
    	- Computing character bounding boxes was taking an inordinate amount
    of time.  (performance problem only) (gdevpdff.c)
    	- The pdf_image_writer and pdf_image_enum structures didn't have GC
    descriptors, possibly causing memory corruption.  (gdevpdfi.c)
    	- PostScript files containing images with premature end-of-data were
    converted to PDF files with premature end-of-data, which Acrobat doesn't
    accept. (gdevpdfo.h, gdevpdfx.h, gdevpdfi.c, gdevpdfo.c, gdevpdfu.c)
    	- Pattern resources whose image was written in-line omitted a needed
    gsave (q).  (bug introduced in 5.94) (gdevpdfi.c)
    	- The similarity between a font and a base font wasn't computed
    correctly, leading to some unnecessary writing of Widths for standard fonts.
    (gdevpdft.c)
    	- Embedding a stream in the psdf_binary_writer caused garbage
    collector problems, because there could be pointers to that stream from
    elsewhere.  (gdevpsdf.h, gdevpsdf.c)
    	- The algorithms for deciding whether a font was script or serif
    were very inaccurate.  (The revised ones are only somewhat better.)
    (gdevpdff.c)
    	- Re-encoded characters in subset fonts weren't handled correctly.
    We work around this by writing the entire font if the character doesn't
    appear in the font's encoding.  This is inefficient but will always produce
    correct output.  (gdevpdff.h, gdevpdff.c, gdevpdft.c, gdevpdfw.c)
    	- The meaning of bit 6 in the Flags was supposed to have changed in
    PDF 1.2, but didn't.  (gdevpdff.h, gdevpdff.c, gdevpdfw.c)
    	- The Widths array didn't get written out for embedded subsets of
    the built-in fonts.  (gdevpdfw.c)
    	- Planar images weren't handled correctly, and could cause memory
    corruption.  (gdevpdfi.c)
    	- Patterns still weren't scaled correctly; in fact, the "fix" in
    5.94 can't possibly have worked, and we don't understand why it seemed to.
    (gdevpdfi.c)

    Recants the belief that the default encoding for embedded fonts is
    StandardEncoding (see 5.95): the appearance of this was a symptom of having
    multiple fonts with the same name.  (gdevpdft.c)

    Removes FONT_EMBED_UNKNOWN, which is meaningless (a decision is always made
    about whether to embed a font).  (gdevpdff.h, gdevpdff.c, gdevpdft.c)

    Changes the algorithm for picking the base font so that it produces more
    efficient output for certain cases of re-encoded fonts.  (gdevpdft.c)

    Interpreter (PDF)

    Fixes problems:
    	- Fonts were getting renamed unnecessarily.  (performance and PDF
    output size problem only) (lib/pdf_font.ps)
    	- Fonts with Widths but no FontDescriptor caused an error.
    (lib/pdf_font.ps)
    	- TrueType fonts processed the Encoding key in the font the same way
    as other font types, which is not correct.  (lib/pdf_font.ps)
    	- For embedded Type 3 fonts, the Widths entry in a font didn't
    override the width in the CharProc.  (lib/pdf_font.ps, lib/pdf_ops.ps)
    	- If a page had multiple Contents streams, and one of the streams
    ended with values on the operand stack, an error might occur.
    (lib/pdf_main.ps)
    	- Ts and Tz within a text object didn't take effect immediately.
    (lib/pdf_ops.ps)
    	- sc[n] and SC[N] could cause an error because Do left an extra item
    on the stack temporarily.  (lib/pdf_draw.ps)

    Interpreter

    Fixes problems:
    	- Getting the unscaled outline for a Type 1 font didn't disable
    hinting.  (mostly a performance problem) (zchar1.c)
    	- Error conditions during initialization weren't recognized.  Fixing
    this required changing various return types from void to int.  (ialloc.h,
    iinit.h, imain.h, interp.h, ialloc.c, iinit.c, imain.c)
    	- HalftoneMode didn't affect setscreen or setcolorscreen.
    (lib/gs_init.ps, lib/gs_ll3.ps)

    Makes the interpreter quit with a message, rather than a stack dump, if it
    can't open the initial device and DEBUG is not set.  (lib/gs_init.ps)

    Adds .setlimitclamp and .currentlimitclamp operators to access the limit
    clamp flag in the graphics state.  (zgstate.c)

    Changes the names of the stochastic halftone mask to be more descriptive.
    (lib/ht_ccsto.ps, int.mak, unixinst.mak)

    Streams

    Adds the ability to forbid using hex encoding when writing strings.
    (spsdf.h, spsdf.c)

    Library

    Fixes problems:
    	- Computing the width of a glyph unnecessarily constructed the
    entire outline.  (performance problem only) (gxtype1.c)
    	- Getting the unscaled width of a glyph in a Type 1 font didn't
    disable hinting.  (mostly a performance problem) (gxtype1.c.)
    	- The "unknown device" GC descriptor is no longer used.  (gsdevice.c)
    	- Some compilers *still* complained about end-of-loop code not being
    reached.  (gxpath2.c)
    	- Mixing float and double values sometimes caused spurious lines to
    be drawn when stroking very short lines with large widths.  (fix from
    Artifex) (gxpdash.c)
    	- The code for handling crossing lines in the path filling algorithm
    sometimes computed line crossings incorrectly, causing excessive
    computation.  (gxfill.c)
    	- When oversampling for anti-aliasing, the flatness parameter was
    not scaled, leading to unnecessarily accurate curve rendering.  (gspaint.c)
    	- An extra grestore in a Pattern PaintProc could cause a crash.
    (gxpcmap.c)
    	- Error conditions during initialization weren't recognized.  Fixing
    this required changing the return type of init_proc, and various other
    internal procedures, from void to int.  (std.h, gslib.h, gscdefs.h,
    gshtscr.c, gsiodev.c, gslib.c, gsutil.c)

    Splits off the Type 1 encryption/decryption code into a separate file for
    sharing with the eexec streams.  (gscrypt1.c, gxtype1.c)

    Version 5.97 (beta) (11/22/99)

    This is the next beta for 6.0.  We believe the pdfwrite driver (ps2pdf) now
    finally produces Acrobat-acceptable output, with reasonable handling of
    fonts, and have also fixed the problem with high-level image banding.  We
    are cautiously hopeful that this is a "real" beta candidate.

    Incompatible changes

    (Drivers)
    	- The default CompatibilityLevel in the pdfwrite driver is now back
    to 1.3.
    (Library)
    	- The seac_data procedure of a Type 1 font must now be able to
    return the glyph and/or the actual outline data.

    Documentation

    Fixes problems:
    	- A <br> was missing.  (doc/Release.htm)
    	- The final step of copying releases to www.aladdin.com was missing.
    (doc.Release.htm)

    Documents the new situation with the ps2pdf* scripts.  (doc/Ps2pdf.htm)

    Documents the simplification of the pthreads code.  (doc/Helpers.htm,
    doc/Make.htm)

    Adds a requirement to the license that modifications include the name and
    e-mail address of the author, and the date and purpose of the modification.
    (doc/Public.htm)

    Adds a link to the documentation for setdistillerparams.  (doc/Ps2pdf.htm)

    Procedures

    Fixes problems:
    	- On OpenVMS, the test for whether the bin and obj subdirectories
    already existed was incorrect.  (openvms.mak, openvms.mmk)
    	- The recently updated Borland/Inprise makefile deleted some temp
    files prematurely.  (bcwin32.mak)
    	- The dependencies for the Unix install-scripts and install-data
    targets were incorrect.  (unixinst.mak)

    Updates the RPM spec files.  (gs.rps, gs-fonts.rps, rpm-conf.dif)

    Adds support for compilation with Borland/Inprise C++Builder 3.
    (bcwin32.mak, winint.mak)

    Adds a note on font installation under Red Hat Linux 6.  (doc/Install.htm)

    Utilities

    Adds ps2pdf12 and ps2pdf13 scripts to select the PDF output level
    explicitly; makes ps2pdf a wrapper for ps2pdf12.  (lib/ps2pdf,
    lib/ps2pdf.bat, lib/ps2pdf12, lib/ps2pdf12.bat, lib/ps2pdf13,
    lib/ps2pdf13.bat, lib/ps2pdfwr, lib/ps2pdfwr.bat)

    Updates the Windows install/setup program to display the Aladdin start menu
    folder on a successful install, so that the user gets some feedback that all
    went well.  (dwinst.cpp, dwsetup.cpp)

    Drivers

    Fixes problems:
    	- The lj5{mono,gray} drivers didn't send the page size to the
    printer.  (gdevpxut.h, gdevlj56.c, gdevpx.c, gdevpxut.c)
    	- The pxl drivers didn't handle out-of-range points properly.
    (gdevvec.c, gdevpx.c)
    	- The bmpa drivers didn't produce multi-page output files correctly
    -- all pages but the first were blank.  (The bmp format is supposed to be
    single-page, but at least some readers handle multi-page files correctly.)
    (gdevbmpa.c)
    	- The code for writing embedded TrueType fonts was broken.  (bug
    probably introduced in 5.9x) (gdevpsdt.c)

    Removes an unused variable.  (gdevbmpa.c)

    Platforms

    Replaces the 4 pthreads files, which included a dependence on the non-POSIX
    <semaphore.h>, with a single file that uses only pthreads procedures.
    (gp_psync.c, gp_posem.c [deleted], gp_pthr.c [deleted], gp_ptsem.c
    [deleted], gp_semon.c [deleted])

    PDF writer

    Fixes problems:
    	- Whether or not to write the Widths array was implicit in the data
    structures rather than explicit, so it was sometimes written unnecessarily.
    (gdevpdfx.h, gdevpdff.c, gdevpdft.c)
    	- Fonts based on the 14 built-in fonts didn't set BaseFont to the
    name of the built-in font.  (gdevpdff.c)
    	- The determination of whether a glyph was available was incorrect
    for embedded fonts, leading some glyphs to be turned into bitmaps
    unnecessarily.  (gdevpdft.c)
    	- Apparently Acrobat Reader gets confused if different subsets of
    the same font have different FirstChar and LastChar values, so we have to
    write the full Widths array each time.  (gdevpdfx.h, gdevpdff.c, gdevpdft.c)
    	- A structure member wasn't initialized when processing pdfmark
    annotations, possibly causing a memory access error.  (gdevpdfm.c)
    	- The typedef for gx_device_pdf had a typo.  (gdevpdfx.h)
    	- Each embedded font subset had its own FontDescriptor and its own
    font data, confusing Acrobat Reader.  Fixing this required sharing
    FontDescriptors among multiple fonts and making FontDescriptors
    pseudo-resources.  (gdevpdff.h, gdevpdfx.h, gdevpdf.c, gdevpdff.c,
    gdevpdft.c, gdevpdfw.c)
    	- Incrementally defined embedded Type 1 fonts didn't write out
    correct Widths.  (gdevpdff.c)
    	- PDF resources didn't consistently record the gs_id of the
    structure they represented, possibly causing resources to be duplicated
    unnecessarily.  (gdevpdff.c, gdevpdfu.c)

    Reinstates PDF text output.  (gdevpdf.c)

    Changes the default CompatibilityLevel in the pdfwrite device back to 1.3,
    since the ps2pdf scripts now make it easy to choose the PDF level.
    (gdevpdf.c)

    When possible, uses the widths obtained from the font, rather than the
    default implementation of text_process, to complete the text_process
    operation.  This greatly speeds up the conversion process.  (gdevpdft.c)

    Allows character remapping (but not reencoding) of TrueType fonts.
    (gdevpdft.c)

    Factors the definitions for cos objects and font-related objects into header
    files more thoroughly.  (gdevpdff.h, gdevpdfo.h, gdevpdfx.h, gdevpdf.c,
    gdevpdff.c, gdevpdfi.c, gdevpdfm.c, gdevpdfr.c, gdevpdft.c, gdevpdfu.c)

    Makes the names of some structure elements correspond more directly to keys
    in PDF directories.  (gdevpdff.h, gdevpdff.c, gdevpdft.c)

    Splits off the font-writing code, since a source file was getting too big.
    (gdevpdff.h, gdevpdff.c, gdevpdfw.c)

    Adds CharSet information to embedded Type 1 font descriptors.  (gdevpdfw.c)

    Makes all font names in the output unique, selected by static bool
    MAKE_FONT_NAMES_UNIQUE.  (gdevpdff.h, gdevpdff.c, gdevpdft.c)

    Reinstates support for one special case of composite fonts (8/8 mapping with
    the high order byte always zero) that is used by the AdobePS4 Windows
    driver.  (gdevpdft.c)

    Changes the assumption about the default encoding for embedded TrueType
    fonts from StandardEncoding to no known encoding.  (gdevpdft.c)

    Changes FONT_EMBED_BASE14 to FONT_EMBED_STANDARD for greater
    descriptiveness.  (gdevpdff.h, gdevpdff.c, gdevpdft.c)

    Interpreter

    Fixes problems:
    	- The same-font test for Type 1 fonts didn't correctly identify
    re-encoded fonts with unchanged metrics.  (zfont1.c)
    	- If a save level was split into multiple internal save objects,
    some changes could get undone before objects were finalized.  (isave.c)
    	- When releasing all of memory, stable allocators weren't finalized.
    (isave.c)
    	- Some compilers gave annoying and needless warnings about integer
    overflow.  (store.h)
    	- There was a signed/unsigned char * mismatch.  (iccfont.c)

    Adds a debugging procedure.  (idebug.h, idebug.c)

    Changes the Type 1 font seac_data procedure to match the new API.
    (zchar1.c)

    Library

    Fixes problems:
    	- The GC didn't know about the pointers to the tables for Indexed
    color spaces when banding, occasionally causing the tables to be written as
    garbage.  This is the real fix for the problem discovered in 5.96.
    (gsiparam.h, gxclist.h, gxiparam.h, gxclimag.c, gxclist.c, gxclpath.c)
    	- With 'async' drivers, multi-page files didn't render properly
    (they got a rangecheck error on every page after the first one).
    (gdevprna.c)
    	- Some compilers still complained about end-of-loop code not being
    reached.  (gxpath2.c)
    	- The scaled font cache required that a font have a UID in order to
    be a candidate for caching.  (gsfont.c)
    	- An obsolete check caused slight discrepancies between banded and
    non-banded output.  (gxstroke.c)
    	- The glyph_outline procedure for TrueType fonts transformed the
    width by the scaling matrix twice.  (gstype42.c)

    Removes some now-unnecessary extern_st declarations.  (gdevbbox.c,
    gdevplnx.c, gximage3.c)

    Removes some initializations that read uninitialized locations and are
    logically unnecessary.  (gsalloc.c, gscolor.c)

    Adds makefile rules for compiling the MD5 implementation.  (lib.mak)

    Makes the seac_data of a Type 1 font return the glyph and/or the actual
    outline data.  This is necessary because some Type 1 fonts don't have the
    accents in the same positions as StandardEncoding, but use seac anyway.
    (gxfont1.h)

    Changes the Type 1 font interpreter to match the new seac_data API.
    (gxtype1.c)

    Version 5.96 (beta) (11/12/99)

    This is the next beta for 6.0.  To meet a need of our commercial licensing
    partner for a PostScript LL3 release, we are releasing this fileset with all
    font handling in the PDF writer disabled, as well as high-level image
    banding.  This is a temporary measure: we will reinstate PDF text in 5.97,
    and high-level image banding as soon as we can straighten out its memory
    management problems.

    Incompatible changes

    (Procedures)
    	- All Unix 'make' programs must now predefine MAKE as the name of
    the program.
    (Interpreter)
    	- zcolor_remap_one now returns o_push_estack rather than 0 in the
    case where it doesn't actually have to sample the procedure.
    (Library)
    	- Multi-plane halftones (when needed) are now used for all CMYK
    devices, not only if setcolorscreen was executed.
    	- Font implementors must now provide a same_font procedure.

    Documentation

    Makes it clear that gsnup.ps is very simple and naive.  (doc/Psfiles.htm,
    lib/gsnup.ps)

    Documents the new -Z_ switch.  (doc/Use.htm)

    Documents that SYNC=nosync allows building on systems that don't support
    multi-threading.  (doc/Make.htm)

    Adds documentation for building on Macintosh Rhapsody systems.
    (doc/Make.htm)

    Adds a reference to the new all-arch.mak file.  (doc/Helpers.htm,
    doc/Make.htm)

    Notes that ps2pdf does preserve the color space for images.
    (doc/Ps2pdf.htm)

    Documents the new self-extracting archive for MS Windows.  (doc/Install.htm,
    doc/Release.htm)

    Further improves the documentation of the PDF text machinery.  (gdevpdfx.h)

    Reorganizes the build information for Unix.  (doc/Make.htm)

    Adds information on building Ghostscript under BSDI.  (doc/Make.htm)

    Notes that versions of zlib before 1.1.3 may cause an error on rare
    occasions.  (zlib.mak)

    Fixes a few other minor problems.  (doc/Current.htm, doc/Devices.htm,
    doc/DLL.htm, doc/Install.htm, doc/Language.htm, doc/Make.htm,
    doc/New-user.htm, doc/Ps2pdf.htm, doc/Source.htm, doc/Use.htm)

    Procedures

    Fixes problems:
    	- dctd.dev and dcte.dev were defined in $(PSD), but referenced in
    $(GLD).  (devs.mak, int.mak, lib.mak)
    	- pipe.dev was defined in $(GLD), but referenced in $(PSD).
    (bcwin32.mak, dvx-gcc.mak, msvc32.mak, unix-gcc.mak, unixansi.mak,
    unixtrad.mak)
    	- XLIBDIRS was included in the linker command even if none of the
    X drivers were used.  (devs.mak, dvx-tail.mak, ugcclib.mak, unixlink.mak)
    	- The OpenVMS makefile didn't create the obj and bin directories
    properly.  (openvms.mak)
    	- 'make debug' and 'make pg' didn't work on Unix systems where the
    make program was named something other than make.  (unix-end.mak)

    Introduces a new top-level makefile macro, STDLIBS, that is -lm for all
    reasonable platforms but null for Rhapsody.  (dvx-gcc.mak, dvx-tail.mak,
    ugcclib.mak, unix-gcc.mak, unixansi.mak, unixlink.mak, unixtrad.mak)

    Adds Nelson Beebe's contributed multi-architecture Unix makefile.
    (all-arch.mak)

    Makes it theoretically possible in theory to build the new Windows
    install/uninstall program with the Borland compiler.  However, since this
    requires Borland C++ 4.52 and we only have 4.5, this is disabled in
    bcwin32.mak.  (bcwin32.mak, winint.mak)

    Utilities

    Fixes problems:
    	- The default for gsnup.ps was 3x2 landscape, rather than 2x2
    portrait.  (lib/gsnup.ps)
    	- gslp.ps was broken (by the changes made to support gsnup.ps).
    (lib/gslp.ps)

    Adds a -link switch to genconf, to allow verbatim copying of commands into
    the linker command line.  (genconf.c)

    Edits files to add missing $Id lines and module summary comments, and to
    delimit module summary comments from further material.  (dwinst.h,
    dwsetup.h, dwuninst.h, bench.c, dwuninst.cpp)

    Makes it possible to build the new Windows install/uninstall program with
    the Borland compiler.  (dwinst.cpp, dwsetup.cpp, dwsetup.def, dwsetup.rc,
    dwuninst.cpp, dwuninst.def)

    Drivers

    Fixes problems:
    	- Embedded Type 1 fonts lacked some 'def' commands.  (gdevpsd1.c)
    	- Multiple Master Font instances weren't written out correctly.
    (gdevpsd1.c)

    Edits files to add missing $Id lines and module summary comments, and to
    delimit module summary comments from further material.  (gdev8bcm.h,
    gdevht.h, gdevpccm.h, gdevpcl.h, gdevsvga.h, gdevx.h, gdev3852.c,
    gdev8510.c, gdevadmp.c, gdevcd8.c, gdevcif.c, gdevclj.c, gdevhl7x.c,
    gdevifno.c, gdevimgn.c, gdevl31s.c, gdevmeds.c, gdevmswn.c, gdevos2p.c,
    gdevpe.c, gdevpm.c, gdevsj48.c, gdevtknk.c, gdevupd.c, gdevwddb.c,
    gdevwpr2.c, gdevwprn.c)

    Platforms

    Fixes problems:
    	- The pthreads wrapper had a procedure type mismatch.  We fixed this
    by making it allocate and free a wrapper object, as the Windows wrapper
    does.  (gp_pthr.c)

    Edits files to add missing $Id lines and module summary comments, and to
    delimit module summary comments from further material.  (dwimg.h, dwmain.h,
    gsdll.h, gp_msio.c, gp_mswin.c)

    Removes an unnecessary #include <semaphore.h>.  (gp_semon.c)

    Adds a module that implements semaphores using the pthreads mutex
    facilities, as an alternative to gp_posem.c.  Unfortunately, using this
    module causes immediate crashes on both Linux and BSDI, and we don't know
    why.  (Let us know if you figure it out.)  (gp_ptsem.c)

    PDF writer

    Fixes problems:
    	- The character and word spacing weren't recognized as being reset
    by a PDF grestore.  (gdevpdfx.h, gdevpdfu.c)
    	- Fonts that couldn't be embedded were always converted to bitmaps,
    rather than becoming candidates for non-embedded representation (if
    EmbedAllFonts is false and the font doesn't appear on the AlwaysEmbed list).
    (gdevpdfx.h, gdevpdff.c, gdevpdft.c)
    	- Stream-type Cos objects were written with no (0-length) data.
    (gdevpdfm.c)
    	- Reencoded base 14 fonts were not recognized as such, leading to
    excessive font embedding.  (gdevpdfx.h, gdevpdf.c, gdevpdff.c, gdevpdft.c)
    	- Fonts were embedded by default even if EmbedAllFonts was false.
    (gdevpdft.c)

    Changes MaxSubsetPct to 35 to match Acrobat Distiller.  (gdevpsdf.h)

    Adds some tracing output (-Z_).  (gdevpdff.c, gdevpdft.c)

    Temporarily disables font handling in the PDF writer, to meet a need of our
    commercial licensing partner.  All text will be converted to code-scrambled
    Type 3 bitmap fonts.  (gdevpdf.c)

    Interpreter (PDF)

    Fixes problems:
    	- The sh operator caused an invalidaccess error for shadings that
    required a DataSource.  (lib/pdf_draw.ps)
    	- The test for whether a Widget appearance was a Form or a
    collection of sub-appearances was incorrect, causing an /undefined error in
    the latter case.  (lib/pdf_draw.ps)
    	- If the FontName in a Font descriptor differed from the BaseFont
    name in the Font object, the interpreter used the two inconsistently,
    sometimes causing the wrong font to be used.  (lib/pdf_font.ps)
    	- ICCBased color spaces caused an error.  (lib/pdf_draw.ps)

    Works around the fact that Acrobat Distiller produces files in which a
    Widget's Form appearance lacks Type and Subtype keys.  (lib/pdf_draw.ps)

    Interpreter

    Fixes problems:
    	- Failure in allocating the name table would cause a crash.
    (iname.c)
    	- Shadings with procedure-based filters didn't work.
    (lib/gs_ll3.ps, ifilter.h, zfileio.c, zfproc.c)
    	- Some compilers complained about arithmetic on an enum.  (iparam.c)
    	- Setting a transfer or similar function to the identity function
    didn't set the cached values, so the setting didn't consistently take
    effect.  (icolor.h, zcolor.c)
    	- If the C library's implementation of sprintf with a %g format ever
    produced a number with an exponent but no decimal point, a crash would
    occur.  (iutil.c)
    	- The PageDeviceName page device parameter wasn't supported.
    (lib/gs_lev2.ps, lib/gs_setpd.ps)
    	- A public procedure wasn't declared extern if DEBUG wasn't set.
    (igc.h)
    	- Because of a typo, loading resources automatically from a file
    always failed.  (bug introduced in 5.94) (lib/gs_res.ps)

    Edits files to add missing $Id lines and module summary comments, and to
    delimit module summary comments from further material.  (files.h, iastate.h,
    ibnum.h, ichar.h, ifilter.h, iimage.h, iimage2.h, iparam.h, isave.h,
    iscan.h, isstate.h, istream.h, iutil.h, opcheck.h, scanchar.h)

    Adds a font similarity testing procedure for Type 1/2/4 fonts.  (zfont1.c)

    Streams

    Edits files to add missing $Id lines and module summary comments, and to
    delimit module summary comments from further material.  (sbhc.h, sbtx.h,
    sbwbs.h, sdct.h, scfdgen.c, scfdtab.c, shcgen.h, siscale.h, sjpeg.h,
    slzwx.h, smtf.h, spdiffx.h, spngpx.h, srlx.h)

    Library

    Fixes problems:
    	- Making a transformed font inappropriately copied the font's
    notification list.  (gsfont.c)
    	- Some compilers complained about end-of-loop code not being
    reached.  (gxpath2.c)
    	- The first two arguments of scale_delta was swapped, causing
    anomalous output for certain Type 1 fonts with curves where the starting and
    ending points had the same X or Y coordinate.  (gxhint3.c)
    	- Large smoothness values produced blocky output.  (gxshade.c)
    	- When banding, in a region where a CMYK halftone had no K at all,
    the output was likely to be black rather than the correct color.  (gxcht.c)
    	- Interpolated images with mirrored X scaling weren't mirrored.
    (gxiscale.c)
    	- Interpolated images were truncated.  (gxiscale.c)
    	- Halftone caches could have a dangling pointer to a transfer map in
    the halftone order.  (gxht.c)
    	- The next-character code returned for kshow was the same as the
    current character.  (bug probably introduced in 5.86) (gstext.c)
    	- The GC didn't know about the pointers to the tables for Indexed
    color spaces when banding, occasionally causing the tables to be written as
    garbage.  In the process of investigating this, we discovered that the GC
    didn't know about *any* of the pointers in the structures used to track
    banded images.  ****** NOT FIXED, TOO MUCH RISK OF INTRODUCING FURTHER
    BUGS. ****** Instead, we disabled high-level image banding in this fileset.
    (gxclimag.c)

    Changes the name of a variable from ppc to ppcr, because an Apple compiler
    inappropriately defines the name ppc when compiling on a PowerPC.
    (gxshade6.c)

    Edits files to add missing $Id lines and module summary comments, and to
    delimit module summary comments from further material.  (gdevbbox.h,
    gscoord.h, gscpixel.h, gsfname.h, gsfont.h, gsimage.h, gslib.h, gsmdebug.h,
    gspaint.h, gspath.h, gspath2.h, gxalloc.h, gxclipm.h, gxclpage.h,
    gxclpath.h, gxcmap.h, gxcoord.h, gxcpath.h, gxdda.h, gxdevmem.h, gxfcache.h,
    gxfont.h, gximage.h, gxiodev.h, gxpaint.h, gxpath.h, gxpcolor.h, gzacpath.h,
    gzcpath.h, gzht.h, gzpath.h, md5.h, gxdither.c, md5.c)

    Adds a prototype for debug_find_pointers.  (gxalloc.h)

    Adds a font procedure for testing whether two fonts are the same in various
    ways.  This is needed so that the PDF writer can do a reasonable job of
    identifying reencoded and renamed versions of the base 14 fonts.  (gxfont.h,
    gsfont.c)

    Changes a macro to a procedure and improves some commenting.  (gxhint3.c)

    Changes the halftoning code so that multi-plane halftones are always used on
    CMYK devices, even if only a single halftone is set (setscreen or
    HalftoneType 1).  (gxcht.c, gxdither.c)

    Version 5.95 (beta) (11/1/99)

    There were several new problems in 5.94, some of them severe.  We hope this
    beta candidate fixes them without introducing any new ones.  It also fixes
    some minor problems not reported in 5.93.

    We think we have finally found the right workarounds for Acrobat and
    specification problems so that pdfwrite output (with CompatibilityLevel
    either 1.2 or 1.3) both conforms as closely as possible to the published PDF
    specification and works with Acrobat Reader (3 or 4 respectively) for both
    displaying and printing.

    NOTE: The default level of output from the pdfwrite device (ps2pdf) has been
    changed back to PDF 1.2 (Acrobat 3 compatible), because this is what the
    majority of users want.  For PDF 1.3 output, use -dCompatibilityLevel=1.3.

    Note: some post-6.0 code is included under an #ifdef POST60.

    Incompatible changes

    (Drivers)
    	- The default CompatibilityLevel in the pdfwrite device (ps2pdf) is
    now 1.2 rather than 1.3.
    	- pdfwrite now discards information after the last showpage rather
    than producing an additional page.
    (Library)
    	- The is_monotonic procedure of a function now returns a result that
    indicates the direction of monotonicity of each value separately.
    	- The coordinate system used internally by the bbox device is now
    upright (lower left corner = (0,0) rather than upper left corner).  (This
    should not make any difference to clients, who should always have been using
    default user space coordinate.)

    Documentation

    Fixes problems:
    	- A couple of URLs were incorrect or out of date.  (doc/Readme.htm,
    doc/Use.htm)
    	- There was a typo in a comment.  (gxfont.h)
    	- An old bug had been fixed, but the documentation had not been
    updated to reflect this.  (doc/Current.htm)

    Documents the requirement to change SYNC from posync to fbsdsync on FreeBSD.
    (doc/Make.htm)

    Adds references to Adobe's on-line documentation.  (doc/Readme.htm)

    Updates the release procedure to mention adding .ps files.
    (doc/Release.htm)

    Adds documentation for the bbox device.  (doc/Use.htm)

    Documents the new gsnup.ps utility.  (doc/Psfiles.htm)

    Modifies the gslp utility for greater page independence and smaller output
    files.  (lib/gslp.ps)

    Documents the fact that the default output from pdfwrite is PDF 1.2.
    (doc/Ps2pdf.htm)

    Adds Inprise (as the new name of the Borland tools) in a few places.
    (doc/Make.htm)

    Updates the release documentation slightly.  (doc/Release.htm)

    Procedures

    Fixes problems:
    	- FreeBSD uses a different name for the pthreads implementation.
    (lib.mak, unixansi.mak, unix-gcc.mak, unixtrad.mak)

    Encapsulates gsnogc.$(OBJ) in a gsnogc.dev module, to make it more sharable.
    (lib.mak)

    Utilities

    Fixes problems:
    	- guilsinglleft and guilsinglright were misspelled.
    (lib/ps2ascii.ps)
    	- The ps2pdf script didn't handle the -I switch correctly.  We fixed
    this by including the options twice, both before and after the automatically
    supplied options.  (lib/ps2pdf, lib/ps2pdf.bat)

    Adds an install/uninstall program for Windows 9x, including optional
    generation of a self-extracting executable, written by Ghostgum Software Pty
    Ltd.  This program is not actually used yet.  (msvc32.mak, winint.mak,
    dwinst.*, dwsetup.*, dwuninst.*)

    Adds a new environment parameter to arch.h, ARCH_DIV_NEG_POS_TRUNCATES.
    (genarch.c)

    Adds a utility for N-up printing.  (unixinst.mak, lib/gsnup.ps)

    Changes ps2pdf so that if showpage has ever been executed, any partial page
    after the last showpage is discarded rather than made into an additional
    page.  This is consistent with printers, and correctly handles BeginPage
    procedures that draw backgrounds.  (gdevpdf.c)

    Drivers

    Fixes problems:
    	- The TIFF drivers could produce incorrectly sorted tag tables.
    (gdevtifs.c)
    	- The OS/2 PM driver had an incorrect #include.  (gdevpm.c)
    	- Embedded Type 1 fonts that used seac didn't automatically include
    the constituent glyphs.  (gdevpsd1.c)
    	- Embedded Type 1 fonts wrote the wrong font name in the first
    (comment) line.  (gdevpsd1.c)
    	- Deleting elements from the AlwaysEmbed or NeverEmbed list could
    cause a memory access error.  (gdevpsdp.c)
    	- The string and string array members of psdf_distiller_params were
    omitted from the GC descriptor, causing memory corruption.  (gdevpsdf.h,
    gdevpsdf.c, gdevpsdp.c)
    	- When using "async" printing, the buffer device was destroyed too
    soon.  (fix from Artifex) (gdevbmpa.c)

    Adds (partial) parsing for the new Acrobat Distiller 4.0 parameters, under
    #ifdef POST60.  The put_params code isn't finished.  (gdevpsdf.h,
    gdevpsdp.c)

    Platforms

    Changes product to productfamily as the Windows registry key.  (gp_wgetv.c)

    Fonts

    Fixes problems:
    	- guilsinglleft and guilsinglright were misspelled in
    MacRomanEncoding and MacGlyphEncoding.  (lib/gs_mro_e.ps)
    	- plusminus was misspelled in MacGlyphEncoding.  (lib/gs_mgl_e.ps)
    	- braceleftbt was misspelled as bracelefttbt in the Symbol font.
    (fonts/s050000l.pfb)  ****** NOT DISTRIBUTED YET ******
    	- euro was incorrectly included at position 240 in the Symbol
    encoding.  (lib/gs_sym_e.ps)
    	- Zcaron and zcaron weren't included in WinAnsiEncoding (this is new
    for PDF 1.3).  (lib/gs_wan_e.ps)
    	- Euro replaced currency in MacRomanEncoding.  We had to change this
    back, even though the Mac does use code 219 for Euro, for compatibility with
    Adobe documentation.  (lib/gs_mro_e.ps)
    	- TrueType fonts with more glyphencoding entries than glyphs could
    cause errors.  (lib/gs_ttf.ps)

    Adds the Adobe Central European encoding.  (lib/gs_ce_e.ps, unixinst.mak)

    Adds more tracing to the TrueType font loader.  (lib/gs_ttf.ps)

    Adds the remaining PDF Encodings to the predefined set.  (lib/gs_lgo_e.ps,
    lib/gs_lgx_e.ps, lib/gs_mex_e.ps, lib/gs_mgl_e.ps, lib/gs_mro_e.ps)

    PDF writer

    Fixes problems:
    	- When printing an error message, a pointer/length string was
    incorrectly treated as a C string.  (gdevpdfm.c)
    	- The treatment of text was completely broken by "improvements" made
    in 5.94.  We think we've put things back to a state that at least isn't any
    worse than 5.93.  (gdevpdfx.h, gdevpdff.c, gdevpdft.c)
    	- The test for whether a glyph was present in a glyph set was wrong,
    possibly causing an infinite loop.  (This never happened, because the code
    was masked by other bugs.)  (gdevpdft.c)
    	- Testing the PDF compatibility level didn't work correctly, because
    of float/double mismatches.  (gdevpdfx.h, gdevpdfp.c)
    	- Embedded TrueType fonts were still written in binary even if
    ASCII85EncodePages was true.  (gdevpdff.c)
    	- Embedded TrueType subsets didn't use Flags to indicate that they
    had a non-standard cmap.  (gdevpdff.c)
    	- Contrary to the obvious reading of the PDF specification, it
    appears that the default encoding for embedded fonts, if no BaseEncoding is
    specified, is StandardEncoding, *not* the built-in encoding of the font
    itself; and that any differences from StandardEncoding must be listed
    explicitly.  (gdevpdft.c)

    Adds parsing for the new Acrobat Distiller 4.0 parameters, under #ifdef
    POST60.  (lib/gs_pdfwr.ps, gdevpdfx.h, gdevpdfp.c)

    Ensures that the Mac encodings are loaded when writing PDF.  (devs.mak)

    Works around an Acrobat 3 bug: The only cmap table that works in TrueType
    fonts is format 0, which can only reference glyphs up to 255.  Consequently,
    a TrueType font whose Encoding references glyphs above 255 cannot be
    embedded (as a font).  (gdevpdft.c)

    Changes the default CompatibilityLevel from 1.3 to 1.2.  The majority of
    users are running Acrobat 3.  (gdevpdf.c)

    Interpreter (PDF)

    Fixes problems:
    	- The T* operator was changed incorrectly to use the negative of the
    leading value.  (lib/pdf_ops.ps)
    	- The Tz value scaled the X offset for Td and TD (which it
    shouldn't), occasionally causing strings to be displaced horizontally.
    (lib/pdf_ops.ps)
    	- sc[n]/SC[N] didn't work with 1-value color spaces, because the
    code incorrectly assumed the operand stack contained only the values on the
    PDF operand stack.  (bug introduced by Annotation rendering in 5.94)
    (lib/pdf_base.ps, lib/pdf_draw.ps, lib/pdf_main.ps, lib/pdf_ops.ps)
    	- The HTP key in the graphics state caused an error if the
    interpreter didn't implement sethalftonephase.  (lib/pdf_draw.ps)
    	- If there was no Names tree, invalid links (string Dest values)
    caused an error instead of being ignored.  (lib/pdf_main.ps)
    	- An annotation with a Thread action caused an error.
    (lib/pdf_main.ps)

    Adds table entries, but not implementation, for the op and OPM keys in
    ExtGState dictionaries.  (lib/pdf_draw.ps)

    Works around a bug in Adobe Acrobat Distiller 4.0 for Windows: it uses the
    value /Default with the BG, UCR, and TR keys in an ExtGState.
    (lib/pdf_draw.ps, lib/pdf_main.ps)

    Adds additional tracing for Functions.  (lib/pdf_draw.ps)

    Implements the BG2, UCR2, and TR2 keys in ExtGStates.  (lib/pdf_draw.ps)

    Interpreter

    Fixes problems:
    	- There was a (harmless) signed/unsigned mismatch.  (imainarg.c)
    	- If build_gs_simple_font had to add any elements to the font
    dictionary, a temporary pointer to the CharStrings could become invalid,
    causing crashes or confusion.  (zbfont.c)
    	- The check for known Encodings included some pseudo-Encodings.
    (zbfont.c)
    	- The error object wasn't reset to null before each call of the
    interpreter, possibly causing the garbage collector to mark it even if it no
    longer existed.  (interp.c)

    Adds productfamily as a new predefined name, for the benefit of the Windows
    registry.  (iinit.c)

    Changes the default color smoothness to 0.02 to match Adobe RIPs.
    (lib/gs_ll3.ps)

    Adds using the glyph_info procedure for Type 1 fonts, needed to fix the
    problem with seac and Type 1 embedded fonts.  (zfont1.c)

    Library

    Fixes problems:
    	- Memory devices that may execute RasterOp must be initialized with
    an allocator (for temporary bitmaps), but sometimes they weren't.
    (gdevdrop.c)
    	- The computation of colors_used for images could cause arithmetic
    exceptions and/or produce incorrect results.  (fix from Artifex)
    (gxclimag.c)
    	- A dead variable was getting incremented in a loop.  (Small
    performance bug only.)  (gsfunc0.c)
    	- The cached is_monotonic value in a function head was incorrectly
    declared bool rather than int.  (gsfunc.h)
    	- The clip operators didn't always recognize empty clipping regions:
    sometimes they retained a 1-pixel-wide region.  (gxcpath.c)
    	- The bbox device could get into a recursion loop if it had a
    non-null target with a non-standard fill_path procedure.  (gdevbbox.c)
    	- The procedure u32 was defined in two places.  (gsutil.h,
    gdevpsdt.c, gsutil.c, gstype42.c)
    	- The DataSource member of a sampled function wasn't reported to the
    garbage collector.  (gsfunc0.h, gsfunc0.c)  ****** MUST DO THE SAME FOR
    SHADINGS ******
    	- All name-type parameters (device and other) were converted as
    strings rather than names.  (gsparam.c)
    	- Using a mask Pattern with an anti-aliased device could make
    invalid memory accesses and cause a crash.  (gxpcmap.c)
    	- math_.h was included unnecessarily.  (gxfill.c, gxhint3.c)
    	- In a few places, (fixed-point) coordinates were truncated towards
    zero rather than taking the floor.  (It's likely that this had no effect.)
    (gxfill.c, gxpcopy.c)
    	- The join and cap values weren't taken into account when dividing a
    stroked path into bands, possibly causing some caps or joins to be dropped
    if they fell exactly at band boundaries.  (gxclpath.c)
    	- An arithmetic overflow in gx_adjust_if_empty could produce
    incorrect output.  (gxfill.c)
    	- Because the bbox device used a Y-inverted coordinate system, it
    could produce incorrect results for out-of-bounds coordinates.  (gdevbbox.c)
    	- The default font_info procedure didn't compute MISSING_WIDTH if
    IS_FIXED_WIDTH wasn't requested.  (gsfont.c)
    	- space_params wasn't managed properly, causing problems if the
    device altered the default values.  (fix from Artifex) (gdevprn.c)
    	- The Macintosh cmap table for embedded TrueType fonts was written
    incorrectly.  (gdevpsdt.c)
    	- The OS/2 table for embedded TrueType fonts could be inconsistent
    with the cmap table.  (gdevpsdt.c)
    	- In embedded subset TrueType fonts, loca entries beyond the last
    occupied glyph contained garbage.  (gdevpsdt.c)
    	- Embedded TrueType subsets didn't include the components of
    composite glyphs.  (gdevpsdf.h, gdevpsd1.c, gdevpsdf.c, gdevpsdt.c)

    Changes the is_monotonic procedure of Functions so that it reports the
    direction of monotonicity of each value independently.  This allows a larger
    class of functions to be detected as monotonic.  (gsfunc.h, gsfunc0.c,
    gsfunc3.c)

    Works around a bug in Fontographer that causes it to produce (or at least
    allow users to produce) Type 1 fonts using seac in which the side bearing of
    the accented character differs from the side bearing of the base glyph.  The
    published Type 1 specification and Adobe's engineers agree that such fonts
    are invalid, but the authors of Fontographer don't seem to care (this is the
    4th Fontographer bug that we have had to patch around so far).  (gxtype1.h,
    gstype1.c, gxtype1.c)

    Adds gs_productfamily, for the benefit of the Windows registry.  (gscdefs.h,
    gscdef.c)

    Adds a glyph_info procedure for Type 1 fonts, needed to fix the problem with
    seac and Type 1 embedded fonts.  (gxfont1.h, gxtype1.c)

    Adds a gs_resize_struct_array procedure that either allocates or resizes an
    object.  We have wanted this for quite a while.  (gsmemory.h, gsmemory.c)

    Adds the remaining PDF Encodings to the predefined set.  Also adds string
    names for the "real" encodings.  (gsccode.h)

    Adjusts the format of embedded TrueType fonts to be closer to that produced
    by Acrobat Distiller, in the hope of making Acrobat Reader accept them.
    (gdevpsdf.h, gdevpsdt.c)

    Version 5.94 (beta) (9/30/99)

    This is (intended to be) the last beta candidate for the 6.0 release.  Most
    changes other than added documentation are bug fixes.  In order to address a
    last-minute problem report, we implemented a subset of Annotation rendering
    for PDF files.

    At the request of the Free Software Foundation, we removed support for GNU
    readline from the Aladdin Ghostscript fileset.  See here for more information.

    We suspect that Acrobat's bugs and limitations still prevent embedded
    TrueType fonts in files created by the pdfwrite device from working
    properly, but we have neither the time nor the means to test this properly.

    Incompatible changes

    (Procedures)
    	- For OpenVMS with MMK or MMS, the third-party libraries are now
    located in [.<lib>] rather than [-.<lib>].
    	- The OpenVMS makefiles now select the same set of devices as the
    Unix makefiles.
    	- The MS Windows and MS-DOS default installation directory is now
    c:\Aladdin\gs#.# rather than c:\gs.
    	- All top-level makefiles now need a definition of BUILD_TIME_GS.
    (Drivers)
    	- The cljet5 driver is renamed cljet5pr; there is a new cljet5
    driver that doesn't attempt (and fail) to handle page rotation.
    (Interpreter)
    	- .getiodevice may return null.
    (Library)
    	- IODevices may now have a null name.

    Documentation

    Fixes problems:
    	- The documentation of font searching was still wrong in both
    places.  (doc/Fonts.htm, doc/Use.htm)

    Notes that certain CodeWarrior code generation options produce incorrect
    code.  (doc/Make.htm)

    Removes an inaccurate and obsolete comment.  (lib/pdf_font.ps)

    Notes that newer versions of the SGI compiler use a different switch for
    setting the optimization limit.  (doc/Make.htm)

    Notes that there may be code generation bugs in MSVC5 and later.
    (doc/Make.htm)

    Documents the new Fontmap.SGI file.  (doc/Use.htm)

    Updates the documentation on installing Ghostscript on MS Windows.
    (doc/Install.htm)

    Documents the removal of the GNU readline interface.  (doc/Current.htm,
    doc/Make.htm)

    Procedures

    Fixes problems:
    	- The instcopy script, supposed to handle incompatibilities between
    Unix `install' commands, didn't work.  (instcopy, unixinst.mak)
    	- The Windows makefiles had an extra occurrence of `.' at the
    beginning of the default search path.  (bcwin32.mak, msvc32.mak,
    msvclib.mak, watc*.mak)
    	- The OpenVMS makefile didn't automatically create the bin and obj
    directories if needed.  (openvms.mak)

    Changes the OpenVMS MMK/MMS makefile to expect the third-party libraries in
    a subdirectory of the current directory, rather than a subdirectory of the
    parent.  This makes it compatible with all the other makefiles.
    (openvms.mmk)

    Changes the OpenVMS makefiles to select the same set of devices as the Unix
    makefiles.  (openvms.mak, openvms.mmk, unixansi.mak)

    Changes the Windows and OS/2 default search paths to match the new
    convention of installation rooted at c:\Aladdin.  (bcwin32.mak, msvc32.mak,
    msvclib.mak, os2.mak, watc.mak, watclib.mak, watcw32.mak)

    Utilities

    Fixes problems:
    	- The Type 1/2 CharString printer didn't handle undefined opcodes
    correctly.  (lib/type1ops.ps)
    	- There was no Unix script for pf2afm.  (lib/pf2afm)
    	- The Type 1/2 font printing utilities didn't default lenIV to -1
    for Type 2, and didn't handle lenIV = -1 correctly in some places.
    (lib/type1ops.ps)
    	- The font2c utility used the version of font2c.ps from whatever
    existing Ghostscript executable was in the search path.  Fixing this
    required adding a new parameter in all top-level makefiles, BUILD_TIME_GS.
    (cfonts.mak, bcwin32.mak, dvx-gcc.mak, msvc32.mak, openvms.mak, openvms.mmk,
    os2.mak, unix-gcc.mak, unixansi.mak, unixtrad.mak, watc.mak, watcw32.mak)
    	- The pfbtopfa usage message was incorrect.  (lib/pfbtopfa.ps)

    Drivers

    Fixes problems:
    	- The pswrite driver didn't reset the clipping path when writing
    low-level images, possibly causing output to be clipped incorrectly.
    (gdevps.c)
    	- The PNG drivers implicitly declared png_init_io.  Fixing this is
    only possible in libpng versions 1.0.3 and later.  (gdevpng.c)
    	- The cljet5 driver (now cljet5pr) set rotated = true if the page
    was rotated, but didn't set it to false if the page wasn't rotated.
    (gdevclj.c)
    	- Embedded Type 1 fonts didn't include any FontInfo elements.
    (gdevpsd1.c)
    	- Specifying the DCTEncode filter for compressing images caused a
    crash.  This problem is hard to fix correctly because of the complicated
    initialization requirements of the JPEG encoder.  We patched around it by
    substituting FlateEncode (when available) for DCTEncode.  (gdevpsdi.c)

    Renames the cljet5 driver, which has special (and incorrect) hacks to handle
    page rotation for the PCL interpreter, as cljet5pr; adds a new cljet5 driver
    without the hacks.  (gdevclj.c)

    Platforms

    Fixes problems:
    	- On MS Windows and OS/2 systems, the wstdio pseudo-IODevice showed
    up as an instance of the IODevice resource category, causing problems.
    (gp_msio.c, gp_os2.c)

    Adds a set of XBM/XPM icons in 4 sizes, contributed by Gintautas Grigelionis
    (eragigr@ki.ericsson.se).  (lib/gs*.xbm, lib/gs*.xpm, unixinst.mak)

    Brings the Windows and OS/2 code up to date, fixing some minor problems.
    (gdevpm.c, gp_os2.c, gsos2.rc, gspmdrv.rc, os2.mak, pcwin.mak)

    Fonts

    Fixes problems:
    	- The font directory scanner (FONTPATH) didn't recognize TrueType
    fonts tagged as 'true' rather than 0x00010000.  (lib/gs_ttf.ps)

    Changes the TrueType font loader to use ISOLatin1Encoding for constructing
    the CharStrings if there is a Microsoft Unicode cmap and no glyph names in
    the post table.  This seems like a hack, but we aren't sure what the right
    approach would be.  (lib/gs_ttf.ps)

    Adds a Fontmap for SGI IRIX.  This just comments out those fonts that are
    provided by DPS.  (lib/Fontmap.SGI)

    PDF writer

    Fixes problems:
    	- Writing Patterns could cause a memory access error.  (bug
    introduced recently) (gdevpdfi.c)
    	- Filling with a pattern didn't reset the clipping path, possibly
    causing output to be clipped incorrectly.  (gdevpdfi.c)
    	- Patterns weren't scaled correctly.  (gdevpdfi.c)
    	- The data for large Patterns could exceed Acrobat Reader's limit on
    the length of a string.  (gdevpdfi.c)
    	- copy_color did an extra gsave and concat.  (gdevpdfi.c)
    	- Repeated color images weren't detected (performance bug only).
    (gdevpdfi.c)
    	- Names including control characters or spaces produced invalid
    output.  (gdevpdfx.h, gdevpdfu.c)
    	- A matrix multiply was in the wrong order, causing fonts with
    non-zero translation in the FontMatrix to render at incorrect coordinates
    (sometimes off the page).
    	- If a font had one of the 14 standard names but had some characters
    defined by PostScript procedures, the output file would be invalid.
    (gdevpdft.c)
    	- The graphics state line parameters were kept in two different
    copies, causing bookkeeping errors.  (gdevpdfx.h, gdevpdf.c, gdevpdfd.c,
    gdevpdfu.c)
    	- If a page's BeginPage procedure did anything other than erase the
    page to white, the resulting PDF file was invalid.  (gdevpdf.c)
    	- Articles with the same title weren't merged properly.
    (gdevpdfm.c)
    	- The Threads element of the catalog wasn't an indirect object.
    (gdevpdf.c)
    	- Thread actions incorrectly converted the destination (thread
    title) to a name, rather than leaving it as a string.  (gdevpdfm.c)
    	- Fonts with the same name as the built-in ones, but not the
    standard definitions, produced possibly incorrect output.  (gdevpdff.c)
    	- The writer didn't recognize attempts to use Encodings with the
    standard fonts that mentioned characters not present in the font's glyph
    set.  (gdevpdft.c)

    Ensures that the WinAnsiEncoding is loaded when writing PDF.  (devs.mak)

    Interpreter (PDF)

    Fixes problems:
    	- The default (identity) CMap didn't map CID 0 to glyph 0.
    (pdf_fonts.ps)
    	- TrueType fonts with an explicit Encoding didn't work properly.
    (lib/gs_ttf.ps)
    	- If an embedded Type 1 font executed definefont more than once,
    the wrong thing would happen.  (lib/pdf_font.ps)
    	- The T* operator used the negative of the leading value.
    (lib/pdf_ops.ps)

    Implements a subset of Annotation rendering: only Widget annotations, only
    Normal appearance, only S and D borders, no rounded-corner borders.  We did
    this at the very last minute before the release, in order to respond to a
    bug report, and it probably has some bugs.  (lib/pdf_draw.ps,
    lib/pdf_main.ps)

    Interpreter

    Fixes problems:
    	- If an input buffer boundary fell at exactly the wrong place, an
    image whose input was coming from a stream could fail to read the stream EOD
    marker.  (This is quite an old bug.)  (zimage.c)
    	- On MS Windows and OS/2 systems, the wstdio pseudo-IODevice showed
    up as an instance of the IODevice resource category, causing problems.
    (lib/gs_res.ps, ziodev.c)
    	- errorinfo in $error was undefined, rather than null, initially and
    after errors that didn't set it deliberately.  (lib/gs_init.ps)
    	- The InkParams resource category was defined even in systems that
    didn't support in-RIP trapping.  (lib/gs_ll3.ps, lib/gs_res.ps,
    lib/gs_trap.ps)
    	- CID fonts with 0-length data caused an error.  (lib/gs_cidfn.ps)
    	- Type 10 halftone dictionaries were broken -- perhaps they never
    had worked.  (lib/gs_ll3.ps)

    Makes FontInfo entries available through the extended font API, needed to
    allow embedded Type 1 fonts to include those entries.  (zfont1.c)

    Makes it possible to determine whether the current file is a resource file,
    needed to allow distinguishing between built-in and input-embedded fonts.
    (lib/gs_ccfnt.ps, lib/gs_fonts.ps, lib/gs_init.ps, lib/gs_res.ps,
    lib/gs_type1.ps, zfont.c)

    Moves support for GNU readline from the main Ghostscript fileset to the
    GNU-specific fileset.  (unix-gcc.mak, int.mak, gp_gnrdl.c =>
    src/gnu/gp_gnrdl.c, gnu/src/gnudevs.mak)

    Streams

    Fixes problems:
    	- The CCITTFaxDecode filter didn't correctly handle the case where
    the last code of a 1-D row was a black code and occurred less than 7 or 8
    bits before the end of the input stream.  (We thought we fixed this in 5.86,
    but we missed one case.)  (scfd.c)
    	- If an input buffer boundary fell at exactly the wrong place, an
    image whose input was coming from a stream could fail to read the stream EOD
    marker.  (This is quite an old bug.)  Fixing this involved a possibly risky
    change to the definition of sbuf_min_left and the already fragile logic in
    sreadbuf: the fix does solve this problem, but we aren't at all certain it
    didn't introduce new ones.  (stream.h, stream.c)

    Library

    Fixes problems:
    	- The default implementation of copy_tile didn't pass the bitmap id
    for complete tiles, missing potential optimizations (performance bug only).
    (gdevdbit.c)
    	- The patch edges of ShadingType 7 shadings were ordered
    incorrectly, producing incorrect output in some cases where the surface
    folds over itself.  (gxshade6.c)
    	- Flushing internal buffers when rendering an image didn't clip the
    flushed data, producing incorrect output.  (gxidata.c)
    	- Non-zero data_x values for banded images produced incorrect band
    list data.  (It's astounding that this problem hasn't shown up before.)
    (gxclimag.c)
    	- Banded images rotated by 90 degrees could produce "seams" or
    garbage if they crossed band boundaries.  (This is at least the third time
    we have "fixed" this problem.)  (gxclimag.c, gxifast.c)
    	- Circles or ellipses defined by pairs of 180-degree arcs produced
    incorrect output when banding.  (gxclpath.c, gxclrast.c)
    	- setgray et al simply cleared the Pattern pointer in the client
    color rather than adjusting its reference count.  (gscolor.c, gscolor1.c)
    	- The saved graphics state for bitmap/pixmap patterns contained a
    reference to the Pattern color, causing Patterns to be retained when they
    shouldn't be and causing unwanted recursion when freeing them.  (gsptype1.c)
    	- Patterns containing halftoned CMYK colors rendered as all black.
    (bug probably introduced in 5.6x) (gxcht.c)
    	- Because of a typo, CMYK halftoning with only a single plane could
    put too much yellow into the output.  This appears to be quite an old bug.
    (gxdither.c)
    	- The error code from running out of band list memory wasn't
    propagated if the condition was detected in cmd_put_drawing_color, causing
    low-memory recovery not to be invoked.  (gxclpath.c)
    	- (Same error code problem) in clist_change_tile.  (gxclbits.c)

    Adds more font attributes to the set available through a standard API.
    (gxfont.h)

    Adds more statistics to the filling algorithm.  (gxfill.c)

    Adds an is_resource flag to fonts, to indicate that they originated from a
    resource rather than being embedded in an input file.  (gxfont.h, gsfont.c)

    Version 5.93 (beta) (9/11/99)

    This is the next candidate for the 6.0 release.  As with 5.92, all changes
    other than added documentation are bug fixes.

    Incompatible changes

    (Library)
    	- Every stream whose state includes any GC-traceable pointers must
    now have a set_defaults procedure that clears those pointers.

    Documentation

    Fixes problems:
    	- There was an extra /ul tag.  (doc/Release.htm)
    	- Fontmap.GS wasn't mentioned as needing to be installed.
    (doc/Install.htm)
    	- Some documentation for the handling of seac was incorrect.
    (gxtype1.c)

    Removes references to installbsd, which are no longer relevant.
    (doc/Install.htm)

    Updates the information on building with NeXTSTEP.  (doc/Make.htm)

    Procedures

    Fixes problems:
    	- The install command had unpredictably different syntax from one
    "standard" Unix system to another, causing `make install' to fail.  We
    replaced the install command with our own script.  (instcopy, dvx-gcc.mak,
    unix-gcc.mak, unixansi.mak, unixtrad.mak)

    Utilities

    Fixes problems:
    	- pcharstr.ps loaded type1ops.ps with run rather than runlibfile,
    causing an error.  (lib/pcharstr.ps)

    Drivers

    Fixes problems:
    	- Attempting to embed a font whose Encoding included characters not
    present in the font produced invalid output.  (gdevpsd1.c)
    	- Allocating a stream state didn't (automatically) clear all its
    internal pointers, possibly causing GC memory access errors.  (gdevpsds.c)
    	- An #include of string_.h should have been memory_.h.  (gdevpsdf.c)

    Disables compression for very small images.  (gdevpsdi.c)

    Platforms

    Fixes problems:
    	- Compiling gp_msio with MSVC's /MD switch caused a compile-time
    error.  (gp_msio.c)

    PDF writer

    Fixes problems:
    	- A bookkeeping object was allocated with the wrong allocator,
    possibly causing access errors or garbage output.  (gdevpdfu.c)
    	- Certain Patterns weren't treated as such, leading to very large
    output files.  (gdevpdfi.c)
    	- If one of the base 14 fonts had a non-standard FontMatrix, the
    output disregarded this fact.  This could cause double obliquing.
    (gdevpdfx.h, gdevpdff.c, gdevpdft.c)
    	- Articles never got an object ID assigned.  (bug introduced in
    5.91) (gdevpdfm.c)

    Interpreter (PDF)

    Changes the PDF interpreter to allow abbreviated filter names like /Fl for
    all streams, not just in-line images.  This directly contradicts the
    published PDF specification, but Acrobat Reader allows it.
    (lib/pdf_base.ps)

    Interpreter

    Fixes problems:
    	- Compiled fonts were broken by the introduction of i_ctx_p.
    (lib/font2c.ps, ccfont.h, iccfont.c)
    	- Allocating a stream state didn't (automatically) clear all its
    internal pointers, possibly causing GC memory access errors.  (zfproc.c)

    Streams

    Fixes problems:
    	- Allocating a stream state didn't (automatically) clear all its
    internal pointers, possibly causing GC memory access errors.  (scfx.h,
    slzwx.h, spngpx.h, strimpl.h, sbwbs.c, sdctc.c, seexec.c, sfilter1.c,
    siscale.c, szlibc.c)
    	- The PNG predictor streams could fail to process some data at the
    end of the input.  (spngp.c)

    Library

    Fixes problems:
    	- Some obsolete definitions for Turbo C could produce references to
    an undefined procedure (setmem) at link time.  (memory_.h, string_.h)

    Version 5.92 (beta) (9/2/99)

    This is the next candidate for the 6.0 release.  All changes other than
    added documentation are bug fixes.

    Documentation

    Fixes problems:
    	- The News for 5.91 didn't include a summary.  (doc/News.htm)
    	- The documentation for Microsoft platforms didn't mention that you
    must add the Ghostscript bin and lib directories to the PATH.  (doc/Use.htm)

    Adds a file describing Aladdin's process for building, testing, and
    releasing Ghostscript.  (doc/Readme.htm, doc/Release.htm)

    Procedures

    Fixes problems:
    	- Fontmap.GS is now required, but wasn't installed.  (unixinst.mak)
    	- A couple of documentation files weren't installed.  (unixinst.mak)

    Utilities

    Fixes problems:
    	- The ps2pdf script for MS Windows used the wrong name for the
    executable.  (lib/ps2pdf.bat)

    Drivers

    Fixes problems:
    	- An uninitialized variable annoyed some compilers.  (gdevpsdt.c)
    	- The PostScript-writing driver used the wrong allocator, causing
    possible memory access errors.  (gdevps.c)
    	- The PostScript-writing driver didn't clear a pointer, causing
    possible GC errors.  (gdevps.c)
    	- The PostScript-writing driver didn't have a correct GC descriptor,
    causing pointers to be corrupted.  (gdevpsdf.h, gdevps.c, gdevpsdf.c)
    	- Embedded Type 1 fonts unnecessarily filled individual Encoding
    slots with /.notdef.  (gdevpsd1.c)
    	- A large constant produced warnings on some compilers.  (gdevpsdt.c)

    PDF writer

    Fixes problems:
    	- Once again, gcc didn't complain about an ANSI-illegal extra
    semicolon in a declaration list.  (gdevpdfo.h)
    	- Adds a cast to work around the fact that some compilers declare
    the return type of memchr as char * rather than void *.  (gdevpdfr.c)
    	- The bookkeeping for whether a font had been written and freed was
    inverted, causing some fonts to be written many times and other fonts not to
    be written at all.  (gdevpdf.c)

    Interpreter

    Fixes problems:
    	- More places needed workarounds for the alignment aliasing gcc bug.
    The bug only occurs if a pointer variable is dereferenced through a cast to
    a stricter alignment and then dereferenced later in its original form, so it
    doesn't affect very many places.  (igc.c, igcref.c, isave.c)

    Streams

    Makes the stream GC descriptor public for subclassing.  (stream.h, stream.c)

    Version 5.91 (beta) (8/30/99)

    This is the next beta for 6.0.  It includes a major rewrite of the parts of
    the PDF writer that deal with resources and pdfmarks, as well as the usual
    bug fixes.  There are still problems with embedded fonts, both TrueType
    (which sometimes don't show up at all) and Type 1 (which sometimes confuse
    Acrobat Reader 3).

    Documentation

    Fixes problems:
    	- An HTML tag was misplaced in the News file.  (doc/News.htm)

    Notes that the Solaris FONTPATH scanning problem may be fixed.
    (doc/Use.htm)

    Utilities

    Fixes problems:
    	- Many of the margin and width computations in ps2epsi.ps (not
    written by Aladdin) were wrong -- off by 1.  It's only because the bugs
    masked each other or cancelled each other out that the code didn't produce
    errors more of the time.  (lib/ps2epsi.ps)

    Drivers

    Fixes problems:
    	- Font subset glyphs weren't sorted early enough, causing Type 1
    embedded fonts to be written with inconsistent lengths.  (gdevpsd1.c)

    Changes the BMP drivers so that they set the resolution in the BMP header
    rather than leaving it at 0.  This solves some problems reported by users,
    but may cause others.  (gdevbmpc.c)

    Platforms

    Fixes problems:
    	- A change made in 5.90 was incorrect (we couldn't test it, because
    MS Windows and OS/2 systems can't be used over a network).  (gp_msio.c,
    gp_os2.c)

    Adds some conditionalization to work around a bug in some recent versions of
    gcc/egcs.  (stdpre.h, interp.c)

    Fonts

    Fixes problems:
    	- If the extension of a font file name on GS_FONTPATH included any
    upper-case characters, the font would not be found.  (lib/gs_fonts.ps)

    Allows fontmaps to contain <string> run or .runlibfile, to get rid of the
    Fontmap -> Fontmap.GS link that VMS can't handle.  (lib/gs_fonts.ps)

    PDF writer

    Fixes problems:
    	- Very long arguments for pdfmark caused an ioerror, because the
    buffer used for converting them was fixed-length.  (lib/gs_pdfwr.ps)
    	- pdfmarks couldn't refer to objects that hadn't been defined yet.
    (gdevpdfx.h, gdevpdfo.c)
    	- When a DOCVIEW pdfmark added an OpenAction key to the Catalog,
    it omitted the / before the name.  (gdevpdfm.c)
    	- Font resources could be written in the middle of a page contents
    stream.  (bug introduced in 5.90) (gdevpdff.c, gdevpdfu.c)
    	- As usual, there were some signed/unsigned char * mismatches that
    gcc didn't detect.  (gdevpdff.c, gdevpdfm.c, gdevpdfo.c)
    	- Fonts used on a page but freed before the end of the page were
    omitted from the page's resource dictionary.  (gdevpdfx.h, gdevpdf.c,
    gdevpdff.c, gdevpdft.c)
    	- /D or /Dest keys in Action pdfmark dictionaries dropped the first
    character of their value.  (gdevpdfm.c)
    	- If a pdfmark added annotations to a page after the end of that
    page had been reached, those annotations would be lost.  (gdevpdf.c)
    	- ANN, LNK, DEST, and PS pdfmarks ignored the object name, if any.
    (Only OBJ and BP processed the name.) Unfortunately, fixing this required a
    complete overhaul of the way that resources and PDF objects were represented
    internally.  The result is both simpler and more general, but it involved a
    major upheaval in the PDF writer code.  (lib/gs_pdfwr.ps, gdevpdfo.h,
    gdevpdfx.h, gdevpdf.c, gdevpdff.c, gdevpdfi.c, gdevpdfm.c, gdevpdfo.c,
    gdevpdfr.c, gdevpdft.c, gdevpdfu.c)
    	- EP pdfmarks didn't close any open text context.  (gdevpdfm.c)

    Adds debugging code to check the consistency of the embedded Type 1 font
    writer.  (gdevpdff.c)

    Makes /A and /F at the top level of an annotation or outline pdfmark
    equivalent to /Action and /File respectively.  See the code for more
    information.  (gdevpdfm.c)

    Library

    Fixes problems:
    	- Degenerate Bezier curves could cause a division by zero.
    (gxpcopy.c)
    	- Some macros used in non-FPU configurations were missing some
    needed uses of const, and in one case an additional cast.  (gxfarith.h,
    gxfixed.h)

    Changes the discard macro to upper-case.  (stdpre.h)

    Version 5.90 (beta) (8/20/99)

    This is the first real candidate for the 6.0 release.  It does not fix all
    known bugs, but it includes all planned functionality.  New in this fileset:
    	- FunctionType 4 for PDF files.
    	- Alternate printer images for PDF files (-dUsePrinterImages
    	switch).
    	- pdfwrite support for PDF "Cos objects" (without compression for
    	streams).
    	- pdfwrite support for graphics objects named with BP/EP/SP
    	(without compression for the object definition).
    	- pdfwrite font subsetting and embedded TrueType fonts.

    Incompatible changes

    (Interpreter)
    	- ref_stack_init now takes an additional argument.
    	- no_time_slice_proc is removed -- use 0 instead.
    (Library)
    	- Notification client procedures and the gs_notify_ procedures
    take different arguments.
    	- The common part of a gs_function_t structure has changed.
    	- gs_text_enum_init now returns a value that can indicate an error.
    	- The font font_info procedure now takes an additional argument.
    	- The IODevice open_device procedure is now defined as returning
    0 or 1 under specific circumstances.
    	- gxp1fill.h is renamed gxp1impl.h.
    	- Allocators now have an additional procedure they must implement,
    and a state member they must initialize.
    	- Most of the gs..basic.. structure definition macros have been
    renamed.  The ptrs1_stringsN structure definition macros are removed.
    	- Implementations of the text API now must provide a resync
    procedure rather than a restart procedure.

    Documentation

    Documents the new -dUsePrinterImages switch, and the expanded meaning of
    -Z~.  (doc/Use.htm)

    Updates FSF's address in documentation.  (lib/Fontmap.GS, lib/Fontmap.Sol,
    gdevcd8.c)

    Brings the PDF writer (ps2pdf) documentation up to date.  (doc/Ps2pdf.htm)

    Updates the current-release documentation.  (doc/Current.htm,
    doc/Readme.htm)

    Updates the problem-reporting procedure for contributed drivers, and some
    other new-user information.  (doc/New-user.htm)

    Procedures

    Fixes bugs:
    	- Because of a typo, the file gs_mgl_e.ps wasn't installed (on Unix
    systems) by 'make install'.  (unixinst.mak)
    	- The .dev files for drivers didn't depend on devs.mak.  (devs.mak)
    	- The X driver didn't include a needed dependency on the bbox
    device.  (devs.mak)

    Incorporates the pdfmin package into the pdf package, since pdfmin was only
    provided for very small-memory environments and is no longer useful.
    (int.mak)

    Adds additional prototype-checking switches, which are important on 64-bit
    platforms and useful on all platforms, to the gcc compilation line.
    (unix-gcc.mak)

    Utilities

    Fixes bugs:
    	- A backquote was misplaced in the Unix ps2pdf script.  (lib/ps2pdf)
    	- Some example files didn't have %! headers.  (examples/alphabet.ps,
    examples/waterfal.ps)
    	- ansi2knr didn't handle preprocessor directives within a function
    header.  (ansi2knr.c)

    Cleans up some minor compiler complaints.  (genarch.c, genconf.c, echogs.c)

    Drivers

    Fixes bugs:
    	- The PostScript writer sometimes failed to reset the clip path,
    causing parts of the output to be omitted or to appear incorrectly.
    (gdevvec.c)
    	- There was a type mismatch in a conditional.  (gdevxini.c)
    	- A constant array wasn't declared as static.  (gdevpsdt.c)
    	- Once again, there were some signed / unsigned char mismatches that
    gcc apparently can't be forced to detect.  (gdevpsdt.c)
    	- The alternative X drivers didn't have GC descriptors, which could
    lead to memory corruption.  (gdevxalt.c)
    	- The alternative X drivers didn't handle the closing of the
    underlying X driver correctly, leading to a dangling pointer.  (gdevxalt.c)
    	- Font subsetting didn't eliminate duplicate glyphs (glyphs
    referenced more than once from the Encoding vector.)  (gdevpsd1.c,
    gdevpsdt.c)
    	- Type 1 font subsetting didn't ensure the presence of .notdef.
    (gdevpsd1.c)
    	- The embedded TrueType font writer wrote all 16-bit values
    incorrectly.  This could explain a lot!  (gdevpsdt.c)

    Cleans up public functions with no previous prototype.  (gdevtfax.h,
    gdevx.h, gdevdfax.c, gdevtfax.c, gdevx.c, gdevxini.c, gdevxxf.c)

    Adds some procedures to support font subsetting.  (gdevpsdf.h, gdevpsdf.c)

    Adds an alternate font name for writing TrueType fonts.  (gdevpsdt.c)

    Makes the TrueType font writer generate an OS/2 table, a Macintosh cmap, and
    a name table (for the font name), as well as a Windows cmap and post, if
    necessary.  (gdevpsdf.h, gdevpsdt.c)

    Platforms

    Updates a couple of clients for the change in the IODevice open_device
    procedure, eliminating some undesirable externs.  (gp_msio.c, gp_os2.c)

    Fonts

    Adds OS/2 and maxp to the list of tables that must be preserved when loading
    TrueType fonts.  (lib/gs_ttf.ps)

    Registers the complete lists of glyphs in the Adobe Latin fonts as
    pseudo-encodings.  (lib/gs_lgo_e.ps, lib/gs_lgx_e.ps, unixinst.mak)

    PDF writer

    Fixes bugs:
    	- One built-in font was sometimes substituted for another.
    (gdevpdff.c)
    	- Use of composite fonts often produced a rangecheck error.
    (gdevpdft.c)
    	- The structures for named objects were freed twice.  (gdevpdfx.h,
    gdevpdf.c, gdevpdfo.c)
    	- The code to avoid writing a blank between a Td command and
    following text was fragile and still incorrect after being "fixed" twice.
    We removed this minor optimization, at a small cost in file size when not
    compressing.  (gdevpdft.c)
    	- No Names tree was generated for named destinations specified as
    strings.  Rather than do this, we now convert string destinations to names.
    This doesn't scale up well, but it is simple and also is compatible with all
    PDF versions from 1.1 on.  (gdevpdfm.c)
    	- Fonts that define characters incrementally, such as the TrueType
    fonts written by some versions of the AdobePS Windows driver, could omit
    characters if embedded.  Fixing this required delaying writing out fonts
    until the font was about to be freed or the writer was closed.  (gdevpdfx.h,
    gdevpdff.c, gdevpdft.c)

    Cleans up public functions with no previous prototype.  (gdevpdfx.h,
    gdevpdf.c, gdevpdfm.c)

    Updates client code for the change in gs_text_enum_init.  (gdevpdft.c)

    Makes some changes towards handling show operations that must be split up
    internally into multiple operations using different fonts.  (gdevpdfx.h,
    gdevpdff.c, gdevpdft.c)

    Implements the PUT pdfmark for the built-in objects (Catalog, DocInfo,
    Page<#>, ThisPage, PrevPage, NextPage).  This required deferring writing out
    page objects until the end of the document.  (lib/gs_pdfwr.ps, gdevpdfx.h,
    gdevpdf.c, gdevpdff.c, gdevpdfm.c, gdevpdfo.c, gdevpdfu.c)

    Adds table entries, but not parsing, checking, or functionality, for the new
    Acrobat 4 pdfmarks related to document logical structure.  (gdevpdfm.c)

    Implements stream-type Cos objects.  (lib/gs_pdfwr.ps, gdevpdfx.h,
    gdevpdf.c, gdevpdfm.c, gdevpdfo.c, gdevpdfp.c, gdevpdfu.c)

    Implements BP/EP/SP pdfmarks.  (gdevpdfx.h, gdevpdf.c, gdevpdfi.c,
    gdevpdfm.c)

    Changes enumeration and #defined names to upper case, and adds _t to type
    names.  (gdevpdfx.h, gdevpdf*.c)

    Adds an OS/2 table for embedded fonts if missing.  (gdevpdff.c)

    Makes the allocator for the PDF device's internal structures be the stable
    allocator of the device's allocator, not the C heap.  This required
    correcting a number of GC descriptors.  (gdevpdfx.h, gdevpdf.c, gdevpdfu.c)

    Replaces the text restart procedure with the new resync procedure.
    (gdevpdft.c)

    Interpreter (PDF)

    Fixes problems:
    	- Failure to find a font in the Resources dictionary signalled an
    /undefinedfont error (which does not exist) rather than /invalidfont.
    (lib/pdf_font.ps)

    Implements FunctionType 4 functions.  (lib/pdf_draw.ps, zfunc4.c)

    Implements the -dUsePrinterImages switch to use "alternate" printer images
    when rendering.  (lib/pdf_draw.ps)

    Interpreter

    Fixes problems:
    	- Some pointers were declared as ref * that actually could be
    ref_packed *, potentially confusing compilers that follow the new, stricter
    ANSI C rules about alignment aliasing.  (idebug.h, idebug.c, igc.c,
    igcref.c, zmisc.c)
    	- cshow didn't restore the root font after executing the procedure,
    producing incorrect results if the procedure did a setfont.  (ichar.h,
    zcfont.c, zchar.c)
    	- A needed const-breaking cast was omitted.  (zmisc.c)
    	- The memory validator could cause an unaligned access.  (ilocate.c)
    	- restore could free parts of the stacks that were still in use.  We
    fixed this long-standing problem using the new concept of stable allocators.
    (interp.c)

    Moves the implementation of the abs operator to C, required for FunctionType
    4 support.  (lib/gs_init.ps, zarith.c)

    Makes more operator procedures public, required for FunctionType 4 support.
    (zarith.c, zmath.c, zrelbit.c, ztype.c)

    Adds an additional parameter to ref_stack_init, to allow creating a
    temporary stack without having an allocator.  (istkparm.h, istack.h,
    interp.c, istack.c)

    Cleans up public functions with no previous prototype.  (files.h, ichar.h,
    icstate.h, ifilter2.h, ifrpred.h, ifwpred.h, igcstr.h, iimage.h, iimage2.h,
    iinit.h, imain.h, interp.h, iscanbin.h, ivmem2.h, oparc.h, opextern.h,
    icontext.c, igc.c, iinit.c, imain.c, inobtokn.c, interp.c, iscan.c,
    iscanbin.c, zchar.c, zcharout.c, zcolor.c, zcolor1.c, zcontrol.c, zdevice.c,
    zdpnext.c, zdps.c, zfdecode.c, zfile.c, zfilter2.c, zfont0.c, zfunc0.c,
    zfunc3.c, zfzlib.c, zgeneric.c, zht1.c, zht2.c, zimage.c, zimage2.c,
    ziodev.c, zmath.c, zpath1.c, zupath.c, zusparam.c, zvmem.c, zvmem2.c)

    Updates client code for the tweak in the definition of the IODevice
    open_device procedure.  (ziodev.c)

    Implements stable local and global VM allocators.  This required changing
    more places than we would have liked.  (ialloc.c, igc.c, ilocate.c, imain.c,
    interp.c, ireclaim.c, isave.c, zcontext.c)

    Removes the global member of gs_ref_memory_t, since it isn't used.
    (gxalloc.h, ialloc.c, zcontext.c)

    Adds more tracing to the relocation phase of the garbage collector.
    (igcref.c)

    Streams

    Fixes problems:
    	 - jpeg_open_backing_store no longer had the correct arguments.
    (This had no effect in practice, since the procedure was never called.)
    (sjpegc.c)

    Cleans up public functions with no previous prototype.  (scfdgen.c,
    scfetab.c, sjpegc.c, slzwce.c, slzwd.c, stream.c)

    Adds some tracing to the image scaling stream.  (siscale.c)

    Library

    Fixes bugs:
    	- A null OutputFile name could cause an error.  (gxdevice.h,
    gsdevice.c, gsfname.c)
    	- Shading with non-monotonic Functions produced incorrect output.
    (gxshade1.c)
    	- An #undef didn't match the #define it was supposed to cancel.
    (gxchar.c)
    	- The default next_char_glyph procedure didn't handle FROM_CHARS or
    FROM_SINGLE_CHAR data sources.  (gstext.c)
    	- When finalizing a forwarding device, the target pointer in the
    device wasn't cleared, leading to an incorrect attempt to access it later.
    (gdevnfwd.c)
    	- Interpolated images were broken, probably since 5.81.
    (gxiscale.c)
    	- Some color space implementation procedures hadn't been updated to
    add 'const' to the color space argument.  (gscie.c)
    	- A constant had a signed/unsigned ambiguity on systems where
    sizeof(long) > 4.  (gsccode.h)
    	- The font font_info procedure didn't provide for scaling.
    (gxfont.h)

    Simplifies the notification mechanism to remove the concept of client and
    generating object.  Registration now just takes a closure (procedure +
    opaque data); events pass the closure data and event data.  (gsnotify.h,
    gsfont.c, gsnotify.c)

    Changes gs_notify_unregister so that it can unregister all registrations of
    a particular client rather than only one.  (gsnotify.h, gsnotify.c)

    Adds support for "vanilla" Functions at the library level.  (gsfunc.h,
    gsfunc.c)

    Adds some tracing for Functions.  (gsfunc3.c)

    Redefines function monotonicity to indicate whether the function is
    increasing or decreasing, and implements monotonicity correctly for all
    FunctionTypes except 4.  (gsfunc.h, gxfunc.h, gsfunc0.c, gsfunc3.c)

    Makes Type 0 fonts check that they are being used with a string, not a
    character or (a) glyph(s).  (gxtext.h, gschar.c, gschar0.c, gstext.c,
    gxchar.c)

    Cleans up public functions with no previous prototype.  (gdevmem.h,
    gpcheck.h, gscie.h, gserror.h, gsmemory.h, gxcie.h, gxcldev.h, gxclpath.h,
    gxcmap.h, gxcspace.h, gxfixed.h, gxfont0.h, gxp1fill.h [deleted],
    gxp1impl.h, math_.h, std.h, gconf.c, gdevdrop.c, gdevm1.c, gdevm2.c,
    gdevm4.c, gdevm8.c, gdevm24.c, gdevmr1.c, gdevmr2n.c, gdevprn.c, gsbittab.c,
    gscdef.c, gscie.c, gsciemap.c, gscspace.c, gscscie.c, gsdevmem.c,
    gsdparam.c, gshtscr.c, gsimpath.c, gsiodev.c, gsmisc.c, gsnorop.c, gspath.c,
    gspcolor.c, gsptype1.c, gsropc.c, gsutil.c, gxacpath.c, gxclist.c,
    gxcpath.c, gxi12bit.c, gxicolor.c, gxifast.c, gximono.c, gxiscale.c,
    gxp1fill.c, gxpath2.c)

    Gets rid of some remaining vestiges of 16-bit ints.  (gdevm1.c, gsbitops.c)

    Adds procedures to register clients for notification when a font is freed.
    (gxfont.h, gsfont.c)

    Defines the IODevice open_device procedure as returning 1 if it opened a new
    stream, 0 if it returned an existing stream.  This eliminates some awkward
    externs.

    Adds the concept of a stable allocator -- an allocator that allocates from
    the same heap and in the same VM space as another allocator, but is not
    subject to save and restore.  (gsmemory.h, gsmemraw.h, gsalloc.c,
    gsmalloc.c, gsmemlok.c, gsmemret.c, gsnogc.c)

    Adds some new macros to make defining new kinds of fixed-format structures
    simpler.  (gsstruct.h)

    Replaces the text processing restart procedure with a more general resync
    procedure, which can be used to restart partway through a string.  We retain
    gs_text_restart for backward compatibility and general usefulness.
    (gstext.h, gxtext.h, gdevbbox.c, gstext.c, gxchar.c)

    Adds the Adobe Latin glyph sets as pseudo-encodings.  (gsccode.h)

    Version 5.88 (tester) (8/3/99)

    This fileset adds the ability to reference and embed TrueType fonts in PDF
    output.  Unfortunately, even though the resulting PDF files work fine with
    Ghostscript itself, Acrobat Reader apparently can't handle embedded TrueType
    fonts with non-standard Encodings.  We hope to fix this problem during the
    6.0 beta test period.

    This fileset also adds the ability to buffer X Windows output in a
    client-side bitmap.  This is typically more efficient than trying to push
    many small commands through the X client/server knothole, especially if
    bitmap images or RasterOp are involved.

    Some reported problems have been deliberately left unfixed: we will need
    every minute of the 13 days before the start of the 6.0 beta test period to
    implement the last few items of functionality scheduled for the 6.0 release,
    and we can fix problems (but not add functionality) during the beta test
    period.

    Incompatible changes

    (Library)
    	- The box_device member of the bbox device is replaced by the
    box_data member, with a different meaning.
    	- The x_rect structure is removed; all uses are changed to
    gs_int_rect.
    	- gdevpstr.h is renamed spprint.h.
    	- The parameter printing procedures are moved from gdevpsdf.[hc] to
    spsdf.[hc].
    	- Clients must now allocate gs_font* objects using gs_font_alloc or
    gs_font_base_alloc, not directly with gs_alloc_struct.
    	- The first (vptr) argument of enum_ptrs procedures is now const *.
    EV_CONST is no longer defined.
    	- The pep argument of enum_ptrs procedures is now enum_ptr_t *
    rather than const void **.
    	- The font glyph_pieces procedure is replaced with an option for
    glyph_info.
    	- The font encode_char procedure now takes an additional glyph_space
    argument.
    	- The o_large flag in object headers is renamed o_alone; o_lmark and
    o_lsize no longer exist.  The DO_LARGE and DO_SMALL macros for enumerating
    objects in a chunk are also removed.

    Documentation

    Fixes problems:
    	- News entries since 5.72 had a missing <li> in the table of
    contents entry.  (doc/News.htm)
    	- gs_text_params_t still referred to REPLACE_X_WIDTHS and
    REPLACE_Y_WIDTHS rather than REPLACE_WIDTHS.  (gstext.h)

    Clarifies that the font glyph_outline procedure must append a final moveto
    for the advance width.  (gxfont.h)

    Clarifies that the font enumerate_glyph procedure enumerates glyphs in an
    unpredictable order.  (gxfont.h)

    Documents that reference counted freeing procedures for structures with
    finalization must free the structure itself first rather than last.
    (gsrefct.h)

    Updates documentation on building Ghostscript on MS-DOS and MS Windows.
    (doc/Make.htm)

    Adds some documentation on how the makefiles are / should be structured.
    (doc/Source.htm)

    Documents the new parameters for the X driver.  (doc/Use.htm)

    Updates the language documentation to refer properly to PostScript
    LanguageLevel 3 and PDF 1.3. (doc/Language.htm)

    Procedures

    Fixes problems:
    	- An omitted space in a makefile caused an incompatibility with the
    VMS build utilities.  (lib.mak)
    	- The gsindent script was omitted from the fileset.  (gsindent)
    	- The core library didn't include stream.c, which is now required.
    (lib.mak)
    	- The workaround for the peculiarities of the Watcom compiler's
    command line syntax didn't work.  (zlib.mak)
    	- A DOS command line overflowed in the makefile.  We patched this by
    deleting the bmpgray device from the Borland Windows platform.
    (bcwin32.mak)

    Provides a .lnk file required by the revised linking procedures on MS
    Windows.  (gsdll32w.lnk)

    Straightens out the Watcom makefiles so that it is possible to build a
    Windows executable and DLL using the Watcom compiler.  This required moving
    some parameters around in the other PC makefiles.  (bcwin32.mak,
    msvccmd.mak, watc.mak, watcw32.mak, wccommon.mak, winint.mak, winlib.mak)

    Drivers

    Fixes problems:
    	- The X driver reported the wrong parameter name for errors in the
    value of the WindowID or .IsPageDevice parameter.  (gdevxini.c)
    	- The X driver calculated the Y window dimension incorrectly when
    resizing the window if X and Y resolutions were different.  (Never happens
    in practice.)  (gdevxini.c)
    	- The bmpasep8 device was defined as gx_device_printer rather than
    gx_device_async.  (gdevbmpa.c)
    	- Some casts between signed and unsigned char * were missing.
    (gdevpdff.c, gdevpdft.c)
    	- The PDF writer didn't handle reencoded characters properly in
    non-embedded fonts.  (gdevpdfx.h)
    	- The PDF writer allocated new structures while being closed,
    causing memory corruption if the close procedure was called for
    finalization.  (gdevpdff.c, gdevpsd1.c)
    	- The PDF writer tried to close the resource file twice.  (bug
    introduced since 5.50) (gdevpdf.c)
    	- The PDF writer failed to work around a bug in Acrobat 3 Reader's
    Print function related to re-encoded fonts.  (gdevpdft.c)
    	- The PDF writer incorrectly specified ASCII85Encode rather than
    ASCII85Decode for non-binary embedded fonts.  (gdevpdff.c)
    	- The PDF writer didn't handle embedded fonts with a non-standard
    FontMatrix correctly.  (gdevpdft.c)
    	- The PDF writer didn't handle reassigned characters correctly.
    (gdevpdft.c)
    	- When embedding a Type 1 font, the PDF writer didn't check that the
    font contains only CharStrings (no PostScript procedures), no non-standard
    OtherSubrs, and no CDevProc.  (gdevpsd1.c)
    	- There was an unused label in the mswinpr2 driver.  (gdevwpr2.c)
    	- The X driver didn't flush buffered output before reading back
    bits from the display.  (gdevx.c)
    	- The X driver still didn't set up the color mapping tables
    correctly -- in particular, it didn't initialize cman.color_to_rgb before
    setting up the dither ramp or cube.  This is at least the third time we have
    "fixed" this problem.  (gdevxcmp.c)

    Removes the remaining uses of gs_malloc, gs_free, and gs_memory_default from
    Aladdin's non-display drivers.  (gdevbit.c, gdevbmp.c, gdevbmpa.c,
    gdevcgm.c, gdevclj.c, gdevcljc.c, gdevdjet.c, gdevlj56.c, gdevmiff.c,
    gdevpbm.c, gdevpcx.c, gdevpng.c, gdevpsim.c, gdevtfax.c, gdevtfnx.c,
    gdevxalt.c)

    Adds a MaxBitmap parameter to the X driver: the driver will maintain a
    full-window pixmap in memory if it requires no more space than MaxBitmap.
    The default value of this parameter is 0, meaning never use a client-side
    bitmap.  (gdevx.h, gdevx.c, gdevxini.c, gdevxxf.c)

    Moves the X device closing and get/put parameters procedures from gdevx.c to
    gdevxini.c.  (gdevx.c, gdevxini.c)

    Removes some remaining uses of gs_malloc and gs_free from the X driver.
    Note that this requires making the X device structure properly
    garbage-collectable.  (gdevx.h, gsstruct.h, gdevxini.c)

    Removes the remaining uses of 'register' from the X driver.  (gdevx.c,
    gdevxini.c)

    Removes the remaining uses of the obsolete far_data keyword from Aladdin's
    non-PC drivers.  (gdevbmp.c, gdevbmpa.c, gdevcgm.c, gdevlj56.c, gdevmiff.c,
    gdevp2up.c)

    Improves the X driver's algorithm for deciding when to update the screen,
    and makes its parameters available for reading and setting.  (gdevx.h,
    gdevx.c, gdevxini.c)

    In the X driver's color mapper, improves performance slightly by replacing
    multiplies and divides with shifts and table lookups in the normal case of
    standard color maps.  (gdevxcmp.h, gdevxcmp.c)

    Moves some filter-related code from the driver level to the stream level.
    (gdevpsdf.c)

    Moves some utilities for printing values in ASCII form from the driver level
    to the stream level.  (devs.mak, gdevpdfx.h, gdevpstr.h [deleted], gdevps.c,
    gdevpsde.c, gdevpsdf.c, gdevpsdp.c, gdevpstr.c [deleted])

    Upgrades the PDF writer to handle TrueType fonts as well as Type 1.
    (gdevpdfx.h, gdevpsdf.h, gdevpdff.c, gdevpdft.c, gdevpsde.c => gdevpsd1.c,
    gdevpsdt.c)

    Starts to implement font subsetting in the PDF writer. (gdevpdfx.h,
    gdevpsdf.h, gdevpdff.c, gdevpsd1.c, gdevpsdt.c)

    Partially implements WMode when writing font descriptors.  (gdevpdff.c)

    Changes psdf_binary_writer so that adding the ASCII85 filter in
    psdf_begin_binary doesn't require allocating any memory.  (gdevpsdf.h,
    gdevpsdf.c)

    Makes the PDF writer guess the Ascent and StemV values for embedded fonts
    when it can't determine them by examining the font.  (gdevpdff.c)

    Makes the PDF writer able to handle xshow and yshow (TEXT_REPLACE_WIDTHS).
    (gdevpdft.c)

    Updates code to reflect the addition of glyph_space to the font encode_char
    and enumerate_glyph procedures.  (gdevpsdf.h, gdevpdff.c, gdevpdft.c,
    gdevpsd1.c, gdevpsdf.c, gdevpsdt.c)

    Removes some unnecessary #includes.  (gdevxres.c)

    Removes the sample driver-based CRD from the variant X drivers, since this
    created a pointless dependency.  (The `bit' drivers still provide this
    feature, for testing.)  (gdevxalt.c)

    Changes the default compatibility level of PDF output from 1.2 (Acrobat 3)
    to 1.3 (Acrobat 4).  (gdevpdf.c)

    Platforms

    Fixes problems:
    	- A comment included an extra /*.  (gp_mswin.c)
    	- The definitions for min and max in a couple of files disagreed
    with the ones typically provided in system header files.  (dwimg.cpp,
    dwtext.cpp)

    Removes some unnecessary code related to generating temporary file names.
    (gp_iwatc.c)

    Fonts

    Changes the loader for TrueType fonts to keep the 'instructions', which are
    required if the font is going to be written out in a PDF file.
    (lib/gs_ttf.ps)

    Adds some more debugging output to the TrueType font loader.
    (lib/gs_ttf.ps)

    Registers the MacGlyphEncoding so it can be made available to the PDF
    writer.  (lib/gs_mgl_e.ps, lib/gs_ttf.ps, unixinst.mak, gsccode.h, ifont.h)

    Interpreter (PDF)

    Fixes problems:
    	- The serif and small-caps flags in the FontDescriptor were ignored
    when doing font substitution.  (lib/gs_fonts.ps, lib/pdf_font.ps)
    	- The ri operator was undefined.  We added a dummy definition.
    (lib/pdf_ops.ps)
    	- The redefinitions of restore could cause a recursion loop.
    (lib/gs_fform.ps, lib/gs_lev2.ps)
    	- There was an extra gsave executed for each page, causing the
    graphics state stack to grow deeper and deeper, which caused problems when
    wrapping up at the end of execution.  (lib/pdf_main.ps)

    Implements the sh operator.  (lib/pdf_draw.ps)

    Works around a bug in some PDF files generated by Adobe's PDF library (?),
    which attempt to create a font Encoding array with more than 256 elements.
    (lib/pdf_font.ps)

    Interpreter

    Fixes problems:
    	- The GNU readline completion code (which Aladdin did not write) was
    completely wrong.  (gp_gnrdl.c)
    	- The top-level restore sometimes tried to restore global VM an
    extra time, leading to memory corruption.  (bug probably introduced in 5.85)
    (isave.c)
    	- The glyph_ref procedure was defined in two different places
    (inconsistently).  (ichar.h, zchar.c, zchar1.c)

    Restructures the name table to improve cache coherence and to make it
    possible to store initial name strings in ROM.  (iname.h, inamedef.h,
    inames.h, inamestr.h, igc.c, iname.c, isave.c)

    Changes the scanner so it doesn't copy name strings when scanning a compiled
    init string.  This reduces RAM requirements by about 20K when using compiled
    initialization.  (iscan.c)

    Removes redundant FontBBox correction code, since this is now handled by the
    library.  (zfont42.c)

    Updates the Type 1 and Type 42 font code to implement the new font
    procedures.  (icharout.h, zcharout.c, zchar1.c, zchar42.c, zfont1.c,
    zfont42.c)

    Simplifies the code that checks whether a grestore needs to do a
    setpagedevice.  (zdevice2.c)

    Updates code to reflect the change of the vptr argument of enum_ptrs
    procedures to const *.  (igcref.c)

    Updates code to reflect the change in the pep argument of enum_ptrs
    procedures to enum_ptr_t *.  (igc.h, iscan.h, istruct.h, igc.c, igcref.c,
    ilocate.c, iscan.c)

    Updates code to reflect the addition of glyph_space to the font encode_char
    and enumerate_glyph procedures.  (bfont.h, ifont.h, zbfont.c, zfont1.c,
    zfont32.c, zfont42.c)

    Cleans up some code details.  (idebug.h, ifunc.h, iparray.h, istream.h,
    zfunc.c)

    Removes some no longer needed test code.  (zfont1.c)

    Updates memory manager code to reflect the change from o_large to o_alone.
    (igc.c, igcref.c, ilocate.c, isave.c)

    Changes the printed font substitution message to be closer to what some
    Adobe products print if SHORTERRORS is defined.  (Thanks to Andrew Chilvers
    for the suggestion.)  (lib/gs_fonts.ps)

    Streams

    Fixes problems:
    	- The fix in 5.85 for ASCII85Encode EOLs was wrong and caused a word
    of data to be dropped occasionally.  (sfilter2.c)

    Moves some filter-related code from the driver level to the stream level.
    (stream.h, stream.c)

    Moves some utilities for printing values in ASCII form from the driver level
    to the stream level.  (lib.mak, spprint.h, spsdf.h, spprint.c, spsdf.c)

    Adds some more tracing output for image scaling.  (siscale.c)

    Library

    Fixes problems:
    	- The bbox device's check for whether a rectangle filled the entire
    page was wrong.  (gdevbbox.c)
    	- The bbox device didn't correctly handle parallelograms, triangles,
    or thin lines with points specified in other than ascending order.
    (gdevbbox.c)
    	- The bbox device smashed the reference count of the text enumerator
    it created, causing a memory leak.  (gdevbbox.c)
    	- The bbox device didn't copy back all the dynamic information from
    a subsidiary text enumerator, with unpredictable results.  (gxtext.h,
    gdevbbox.c, gstext.c)
    	- The default implementation of glyph_info for fonts incorrectly
    reported that it returned values for all members, not just the ones it knew
    about.  (gsfont.c)
    	- The profiling implementation of memset was incorrect, leading to
    memory smashing.  (gsmisc.c)
    	- The default implementation of glyph_info had a memory leak.
    (gsfont.c)
    	- The default implementation of character rendering didn't correctly
    handle the case where the character was in the cache and only the character
    width was requested.  (gxchar.c)
    	- Text processing didn't correctly handle REPLACE_WIDTHS if the X
    and Y width arrays were different.  (The PostScript interpreter never does
    this.)  (gstext.h, gstext.c, gxchar.c)
    	- Compositing devices weren't initialized properly, leading to
    invalid accesses.  This is the last (?) bit of the device reference counting
    bug tail.  (gsalphac.c, gsropc.c)

    Changes the bbox device to make the procedures for managing the bounding box
    virtual, so the X device can be a subclass.  (gdevbbox.h, gdevbbox.c)

    Changes the bbox device so it always adds the bounding box after doing the
    drawing operation rather than before, for the benefit of the buffering X
    device.  (gdevbbox.c)

    Removes some remaining uses of gs_memory_default.  (gdevdrop.c)

    Removes all uses of the obsolete far_data keyword from the library.
    (gconf.c, gdevbbox.c)

    Changes the bbox device so it doesn't run drawing algorithms twice if it has
    a target that uses the default implementation.  (gdevbbox.c)

    Speeds up the implementation of fill_rectangle for 16-bit memory devices.
    (gdevm16.c)

    Makes TrueType fonts implement the new font procedures.  (gxfont42.h,
    gxmatrix.h, gsmatrix.c, gstype42.c)

    Adds a gs_id to gs_font objects, so that fonts with the same name can be
    distinguished reliably without relying on the address.  (gxfont.h, gsfont.c)

    Makes the vptr argument of enum_ptrs procedures be const *.  This is a
    long-overdue change.  (gsstype.h, gxxfont.h, gsalloc.c, gsfont.c,
    gsmemory.c) ****** REDO THE CONST-BREAKING CASTS IN gsfont.c ******

    Changes the pep argument of enum_ptrs from const void ** to enum_ptr_t *, to
    get rid of some hacks in enum_ptrs implementations that had to construct
    temporary gs_strings.  (gsstruct.h, gsstype.h, gstext.h, gsalloc.c,
    gscolor2.c, gsfont.c, gsmemory.c, gstext.c)

    Adds a general mechanism that provides for an arbitrary number of clients to
    be notified when an event occurs.  For the moment, we only use it to notify
    PDF writers when a font is about to be freed.  (gsnotify.h, gsnotify.c)

    Makes fonts use the new notification mechanism to notify clients when the
    font is about to be freed.  (gxfont.h, gsfont.c)

    Adds a gs_text_set_cache procedure to parallel restart and retry.
    (gstext.h, gxtext.h, gstext.c)

    Adds a glyph_space argument to the font encode_char and enumerate_glyph
    procedures, so that clients can choose between glyph names and glyph indices
    in environments that use both.  (gsccode.h, gxchar.h, gxfont.h, gxfont42.h,
    gsfont.c, gstype42.c, gxchar.c)

    Changes the bbox device so it optionally considers white to be opaque.
    (gdevbbox.h, gdevbbox.c)

    Cleans up some code details.  (gshsb.h)

    Adds a hack to suppress warning messages from the Watcom compiler about
    testing constant values.  (stdpre.h)

    Replaces the glyph_pieces font procedure with a GLYPH_INFO_PIECES option for
    glyph_info.  (gxfont.h, gxfont42.h, gsfont.c, gstype42.c)

    Adds a font_info font procedure, similar to glyph_info but giving
    information about the font as a whole.  (gxfont.h)

    In order to fix a bug in resizing large objects, gets rid of the concept of
    large objects entirely, replacing it with the concept of an 'alone' object
    that is guaranteed to be the only object in its chunk.  (gxalloc.h, gxobj.h,
    gsalloc.c)

    Adds some more tracing output for interpolated images.  (gxiscale.c)

    Adds a _long parameter setting procedure to parallel _bool, _enum, and _int.
    (gsparamx.h, gsparamx.c)

    Version 5.87 (tester) (6/29/99)

    In this fileset, the pdfwrite device finally handles general Type 1 fonts,
    and can write them in both embedded and non-embedded form.  This fileset
    also contains a few more changes to the text API, and some incompatible
    changes to the gs_font procedure vector: more such changes are likely.  It
    also fixes a couple of long-standing pdfmark bugs.

    NOTE: there are known problems in PDF output with non-embedded fonts (fonts
    represented only by a descriptor): some characters will be missing, and
    because of bugs in Acrobat's Print function, even more characters will be
    missing or wrong when printing from Acrobat.  We will fix our problems, and
    work around Acrobat's bugs, in the next couple of filesets.

    Incompatible changes

    (Library)
    	- Text enumerators now have a release procedure.
    	- gx_device_text_begin no longer stores its arguments into the
    enumerator: the driver text_begin procedure must do this.
    	- The argument list for the font encode_char procedure no longer
    includes the enumerator, and the second argument is now a gs_char rather
    than a gs_char *.
    	- The font next_char procedure is removed.  (It has been obsolete
    for a while.)  The next_glyph procedure is renamed next_char_glyph.
    	- The first argument of the font init_fstack, build_char, and
    next_glyph procedures is changed from gs_show_enum * to gs_text_enum_t *.
    	- gx_font_stack[_item] is renamed gx_font_stack[_item]_t.
    	- New font procedures have been added, of which two (enumerate_glyph
    and glyph_outline) are required.  The font procedure vector has been
    reorganized.
    	- The Type 1 font next_glyph procedure is replaced by the gs_font
    enumerate_glyph procedure.
    	- psdf_embed_type1_font is renamed psdf_write_type1_font, and has
    an additional argument.
    	- psdf_alloc_param_printer takes slightly different arguments;
    print_binary_ok and print_ASCII85_ok are now upper-case.

    Documentation

    Reorganizes the driver API documentation slightly, documents the fact that
    get_alpha_bits and draw_line are obsolete, and documents the driver text
    API.  (doc/Drivers.htm)

    Documents an additional Irix configuration where the compiler doesn't work.
    (doc/Make.htm)

    Procedures

    Moves the %pipe% IODevice into lib.mak, since it is now included on Windows
    as well as Unix.  (lib.mak, unix-aux.mak)

    Adds the bmpgray driver to all platforms that include the other BMP drivers.
    (bcwin32.mak, msvc32.mak, os2.mak, unix-gcc.mak, watc.mak, watcw32.mak)

    Drivers

    Fixes problems:
    	- The PS and PDF writers didn't maintain the font embedding lists
    correctly.  (gdevpsdp.c)
    	- The CreationDate in PDF output was always set to the current date,
    and couldn't be set with a pdfmark.  We now don't set CreationDate at all,
    since it is supposed to be the creation date of the original document, not
    of the PDF file.  (gdevpdfm.c, gdevpdfu.c)
    	- The Producer in PDF output couldn't be set with a pdfmark.
    (gdevpdfx.h, gdevpdf.c, gdevpdfm.c, gdevpdfu.c)
    	- pdfmarks with /Action /GoTo incorrectly retained the Action key.
    (gdevpdfm.c)
    	- pdfmarks didn't substitute /Dest => /D or /File => /F correctly.
    (gdevpdfm.c)

    Updates the PDF writer to use the new text API rather than the show
    pseudo-parameter.  (gdevpdfx.h, gdevpdf.c, gdevpdfp.c, gdevpdft.c)

    Changes pdf_open_document so that it opens the document even if some
    resources have been allocated.  (gdevpdf.c)

    Splits off pdfwrite utilities from top-level control, since the file was
    getting too big.  (gdevpdfx.h, gdevpdf.c, gdevpdfu.c)

    When writing PDF, avoids resetting the word spacing parameter if the string
    doesn't contain any spaces, and the character spacing parameter if the
    string has no more than 1 character.  (gdevpdft.c)

    Splits off PDF font handling from text handling, since the file was getting
    too big.  (gdevpdfx.h, gdevpdff.c, gdevpdft.c)

    Implement both embedded and non-embedded fonts beyond the base 14 in the PDF
    writer.  This code doesn't work very reliably yet.  (gdevpdfx.h, gdevpdff.c,
    gdevpdft.c)

    Adds a bmpgray driver that produces 8-bit gray-scale output.  (devs.mak,
    gdevbmp.c)

    Updates the PDF writer for changes in the gs_font procedure vector.
    (gdevpdff.c, gdevpdft.c)

    Updates the Type 1 font writer for changes in the gs_font procedure vector,
    and adds some output options.  (gdevpsdf.h, gdevpsde.c)

    Changes the printing parameter list implementation to take all of its
    parametric arguments in the params structure, and changes the names of the
    options.  (gdevpsdf.h, gdevpsde.c, gdevpsdf.c, gdevpdff.c, gdevpdfi.c,
    gdevpdfu.c)

    Interpreter (PDF)

    Fixes problems:
    	- Indexed color spaces didn't allow the base space to be an indirect
    reference.  (lib/pdf_draw.ps)
    	- The CS and cs operators didn't accept a literal color space name
    (as opposed to a color space resource name).  (lib/pdf_draw.ps)
    	- Some PDF 1.2 files had a SM entry in graphics state dictionaries,
    even though this is not documented and requires a LL3 interpreter.
    (lib/pdf_draw.ps)
    	- Generated font names included a % character, which could cause
    problems for ps2pdf.  (lib/pdf_font.ps)

    Interpreter

    Fixes problems:
    	- The calculation of the final index when enumerating the pointers
    in a context state was incorrect.  (source bug only, no effect on execution)
    (icontext.c)

    Updates the interpreter's glue code for the changes in the PDF writer.
    (lib/gs_pdfwr.ps)

    Updates a client to use gs_font_alloc.  (zbfont.c)

    Updates clients for changes in the gs_font procedure vector.  (zbfont.c,
    zchar1.c, zfont0.c, zfont1.c, zfont32.c)

    Updates a client for the change to psdf_write_type1_font.  (zfont1.c)

    Library

    Fixes problems:
    	- Some code used rc_decrement_only instead of gx_device_retain.
    (Stylistic bug only.)  (gschar.c)
    	- The finalize procedure for the character cache device could get
    unset and/or the retained flag cleared, leading to a reference count not
    getting decremented.  (gxccman.c)
    	- Allocating a show enumerator didn't clear the show_gstate member.
    (Probably no effect in practice.)  (gschar.c)
    	- Cleaning up at the end of text processing was not consistent and
    sometimes didn't get done. The old API used explicit and separate client
    allocation (gs_show_enum_alloc), release (gs_show_enum_release), and freeing
    (gs_free_object); release, but not free, was automatic at the end of
    processing (in show_finish).  The new API has allocation in gs_text_begin or
    gx_device_text_begin, no implicit release or free, and a single
    gs_text_release call to handle both release and free.  Reconciling these
    required adding an auto_release flag in the gs_show_enum structure to
    indicate which API was used to create it, and a release procedure.  (The
    auto_release flag is only needed for backward compatibility with clients
    that use the old API.  Ghostscript itself no longer has such clients, but
    the PCL interpreters do.)  (gxchar.h, gxtext.h, gdevbbox.c, gschar.c,
    gstext.c, gxchar.c)
    	- We were burned once again by gcc's acceptance of private/public
    procedure mismatches.  (gxchar.c)
    	- A line break was missing between the return type and a procedure
    name.  (gsstate.c)
    	- Show enumerators had an incorrect GC descriptor.  (gxchar.c)
    	- Text enumerators didn't terminate their list properly.  (gstext.c)

    Adds a debugging procedure that finds all the pointers to an object.  This
    uses the GC's pointer enumeration procedures, so it will only work if all
    structures have correct GC descriptors.  (Of course, we think this is true
    of all of Ghostscript.)  The current implementation doesn't trace refs.
    (gsalloc.c)

    Removes remaining references from gxchar.c to procedures defined in
    gschar.c.  The standard Ghostscript build now no longer needs gschar.c,
    although we will keep it for the moment for backward compatibility.
    (gschar.c, gxchar.c)

    Removes an obsolete reference to gs_show_enum.  (gstype1.h)

    Adds definitions for the built-in encoding indices.  (gsccode.h, gxfont.h,
    gxxfont.h)

    To make text_begin implementations callable, requires them, rather than
    gx_device_text_begin, to save their parameters in the enumerator structure.
    (gxtext.h, gstext.c, gxchar.c)

    Adds a TEXT_DO_CHARWIDTH alternative to the text operation, to just advance
    the current point by the character width (stringwidth rmoveto).  (gscpm.h,
    gstext.h, gxchar.c, gxpath.c)

    Adds procedures to allocate and initialize fonts.  (gxfont.h, gsfont.c)

    Starts to revise the gs_font procedure vector to create a real "font socket"
    API, adding several new procedures.  This is a NON-BACKWARD-COMPATIBLE
    change, and there probably are more to come.  (gxchar.h, gxfont.h, gsfont.c,
    gstext.c, gxchar.c)

    Moves the Type 0 font stack from gs_show_enum to gs_text_enum_t, and renames
    its types to gx_font_stack_[item_]t.  Also moves cmap_code.  (gxchar.h,
    gxtext.h, gschar0.c, gstext.c, gxchar.c)

    Moves the glyph enumeration procedure from Type 1 fonts to general fonts,
    changing its name to enumerate_glyph.  (gxfont1.h)

    Changes the debugging code for reference counting to call procedures, to
    allow better breakpointing.  (gsrefct.h, gsmemory.c)

    Version 5.86 (tester) (6/14/99)

    This fileset includes the first batch of changes for the new driver-based
    text API.  Unfortunately, a few of them are non-backward-compatible.
    WARNING: This API is UNSTABLE and should not be used yet.  This includes the
    APIs and structures in gxtext.h, and to a lesser extent those in gstext.h.

    Incompatible changes

    (Interpreter)
    	- The default initialization of fonts now sets next_glyph rather
    than next_char.
    (Library)
    	- The font argument of the driver text_begin procedure is no
    longer declared as const.
    	- Text enumerators now have a is_width_only and current_width
    procedures; the restart procedure is renamed retry, and there is a new
    restart procedure that does something different.
    	- The scale member of gs_text_enum_t is renamed log2_scale.
    	- gs_show_restore_font is removed.
    	- The current_char, current_glyph, width, and log2_current_scale
    members of gs_show_enum are removed (replaced by members of gs_text_enum_t).
    	- The current_width member of gs_text_enum_t is removed.
    	- Replaces TEXT_REPLACE_{X,Y}_WIDTHS with a single
    TEXT_REPLACE_WIDTHS.

    Documentation

    Fixes a number of outdated URLs.  (doc/Devices.htm, doc/Fonts.htm,
    doc/Install.htm, doc/Language.htm, doc/Make.htm, doc/New-user.htm)

    Documents the name change from gs_iso_e.ps to gs_il1_e.ps.
    (doc/Psfiles.htm)

    Documents the fact that a double % may be needed on MS systems.
    (doc/Use.htm)

    Documents that reversepath discards a trailing moveto, for compatibility
    with Adobe implementations.  (gxpath2.c)

    Procedures

    Fixes problems:
    	- Some punctuation was omitted that affects builds on VMS systems.
    (gs.mak)
    	- 'make install' didn't install doc/History5.htm.  (unixinst.mak)
    	- The Borland makefile put some generated files in the top-level
    directory rather than the build directory.  (bcwin32.mak)

    Updates the Unix install script for the name change of gs_iso_e.ps.
    (unixinst.mak)

    Moves the GNU-licensed drivers to a separate makefile.  (contrib.mak,
    gnu/src/gnudevs.mak)

    Adds pipe.dev to the BC++, MSVC++, and OS/2 (GCC/EMX) platforms.
    (bcwin32.mak, dvx-gcc.mak, msvc32.mak, msvclib.mak)

    Utilities

    Fixes problems: - The usage message for pdf2ps was incorrect.  (lib/pdf2ps,
    	lib/pdf2ps.bat)

    Drivers

    Removes all remaining uses of #define'd casts in connection with ENUM_PTRS
    and RELOC_PTRS procedures.  (gdevpdf.c, gdevpdfo.c)

    Adds a user-contributed driver for the Oki Data OkiPage 4w+ LED printer.
    This is a GPL'ed driver.  (contrib.mak, gnu/src/gdevop4w.c)

    Platforms

    Adds a %handle% IODevice (mshandle.dev) to recognize file names of the form
    %handle%NNNNNNNN under MS Windows.  GSview uses this feature in place of
    pipes, which are an open industry standard not supported by MS Windows.
    (msvc32.mak, winlib.mak, gp_mshdl.c)

    Fonts

    Adds the ISO 8859-2 encoding to the stock of built-in encodings.
    (lib/gs_il2_e.ps, lib/gs_iso_e.ps => lib/gs_il1_e.ps)

    Interpreter (PDF)

    Fixes problems:
    	- Using a colored pattern with an uncolored Pattern color space
    caused an error.  (lib/pdf_draw.ps)
    	- Embedded CIDFontType 2 fonts didn't work, and embedded TrueType
    fonts did an extra definefont.  (lib/gs_ttf.ps, lib/pdf_font.ps,
    lib/pdf_ops.ps) ****** IN PROGRESS ******

    Interpreter

    Fixes problems:
    	- Some files hadn't been updated for the removal of the gs_imemory
    static.  (int.mak, gp_gnrdl.c, imain.c, ztrap.c)
    	- %statementedit could append a spurious character if the last
    character of the statement was not whitespace.  (bug probably introduced in
    5.8x) (ziodev.c)
    	- The show operators didn't properly handle the special case of
    executing within a cshow procedure for a non-CID font.  (zchar.c)
    	- cshow applied to a composite font didn't scale the current font
    correctly (in fact, at all).  (zcfont.c)
    	- If an error occurred within the procedure called by
    resourceforall, it wasn't reported.  (lib/gs_res.ps)
    	- flushfile and closefile didn't correctly handle filters that only
    write a fixed amount of data.  (zfileio.c)
    	- cshow didn't restore the font reliably after executing the
    procedure.  (ichar.h, zcfont.c, zchar.c)
    	- An execstackoverflow error might temporarily leave the execution
    stack in an invalid state.  (interp.c)

    Cleans up some macros.  (iname.c, isave.c, iscan.c)

    Removes all remaining uses of #define'd casts in connection with ENUM_PTRS
    and RELOC_PTRS procedures.  (icontext.c, iname.c, isave.c, iscan.c,
    istack.c, zcontext.c, zfproc.c)

    Adds a run-time warning message if gp_gnrdl.c is included in a non-GNU
    build.  (gp_gnrdl.c)

    Converts clients to use the gs_text procedures that replace the gs_show
    procedures, and to use gs_text_enum_t rather than gs_show_enum as the
    enumerator type.  (ichar.h, zbfont.c, zcfont.c, zchar.c, zchar1.c,
    zchar32.c, zchar42.c, zcharout.c, zcharx.c, zfont.c, zfont0.c, zfont1.c,
    zfont32.c, zimage.c, zimage2.c)

    Updates the initialization code for the name change of gs_iso_e.ps.
    (lib/gs_init.ps)

    Splits off the definitions relating to name indices, in anticipation of
    defining some name indices statically.  (inamedef.h, inameidx.h, iname.c)

    Streams

    Fixes problems:
    	- The pixel-difference filters didn't initialize the previous sample
    to 0 at the beginning of each row.  (spdiff.c)
    	- The CCITTFaxDecode filter didn't correctly handle the case where
    the last code of a row occurred less than 7 or 8 bits before the end of the
    input stream.  (scf.h, shc.h, scfd.c)
    	- Flushing filters didn't work.  (stream.c)
    	- The DCTEncode filter gave an error if asked to write to a string
    with less than 100 bytes of free space left when the end of the input data
    was reached.  (sdct.h, sdcte.c)

    Removes all remaining uses of #define'd casts in connection with ENUM_PTRS
    and RELOC_PTRS procedures.  (stream.c)

    Changes the ASCII85Encode stream to reliably insert a newline at least once
    every 80 characters, rather than unreliably after at most 80 characters of
    data.  (sfilter2.c)

    Cleans up some formatting.  (stream.c)

    Library

    Fixes problems:
    	- A client wasn't updated for the change in the declaration of
    gx_dht_proc.  (bug introduced in 5.84) (genht.c)
    	- When rendering a 12-bit-per-sample color image, the device color
    wasn't initialized, possibly causing a memory access error when comparing
    the current color with the previous one.  (gxi12bit.c)
    	- arch_floats_are_IEEE was incorrectly defined as
    arch_floats_are_ieee.  (bug introduced in 5.83) (std.h)
    	- Decoding of IEEE floats on non-IEEE systems was wrong.  (ibnum.c)
    	- The fast case of masked images in Pattern color spaces didn't
    work.  (bug introduced since 5.50) (gxifast.c)
    	- cshow gave an error if there was no current point.  (gxchar.c)

    Replaces TEXT_REPLACE_{X,Y}_WIDTHS with a single TEXT_REPLACE_WIDTHS.
    (gstext.h, gstext.c)

    Cleans up some macros.  (gdevddrw.c, gsfont.c, gsht1.c)

    Removes all remaining uses of #define'd casts in connection with ENUM_PTRS
    and RELOC_PTRS procedures.  (gdevddrw.c, gdevplnx.c, gsalloc.c, gschar.c,
    gscolor.c, gscolor2.c, gscrd.c, gscsepr.c, gscspace.c, gsdevice.c, gsdsrc.c,
    gsfcmap.c, gsfont.c, gsfont0.c, gsht1.c, gshtscr.c, gsimage.c, gspcolor.c,
    gsptype1.c, gsstate.c, gstext.c, gxcmap.c, gxht.c, gxipixel.c, gxmclip.c,
    gxtype1.c)

    Adds gs_c_param_list_write_more, to switch a C parameter list back to write
    mode without clearing it.  (gsparam.h, gscparam.c)

    Adds gs_grestore_only, to do a grestore without requiring 2 entries on the
    graphics state stack.  (gsstate.h, gsstate.c)

    Completes a first bridge between the new driver text_begin procedure and the
    existing text API defined in gschar.h.  The changes are backward-compatible
    for both clients of the APIs and (the few) implementors of text_begin,
    except that the font argument of text_begin is no longer const.  Note that
    gschar.h is no longer used by any client, and in fact is deprecated.
    (gschar.h, gstext.h, gxfcache.h, gxtext.h, gzstate.h, gdevbbox.c,
    gdevnfwd.c, gschar.c, gsfont.c, gsfont0.c, gstext.c)

    Mostly splits off the existing text procedures from the default
    implementation of the new text facilities.  (lib.mak, gxchar.h, gschar.c,
    gxchar.c)

    Makes the structure descriptor for gs_state public, for testing in gxchar.c.
    (gzstate.h, gsstate.c)

    Adds is_width_only and current_width procedures to the text enumerator;
    renames restart as retry, and adds a restart procedure for restarting with
    different parameters.  (gstext.h, gxtext.h, gdevbbox.c, gschar.c, gstext.c,
    gxchar.c)

    Makes the masks for the subgroups of text operation parameters public.
    (gstext.h)

    Removes members of gs_show_enum that are superseded by members of
    gs_text_enum_t: current_char, current_glyph, width, and log2_current_scale.
    (gxchar.h, gxchar.c)

    Adds aliases for popen and pclose under WIN32.  (pipe_.h)

    Moves gs_incachedevice from gschar.h to gsstate.h.  (gschar.h, gsstate.h)

    Version 5.85 (tester) (5/29/99)

    This fileset removes a few more writable statics, and adds uniform support
    for %filedevice%filename syntax in OutputFile.  Unfortunately, removing the
    static that held the interpreter's allocator group was almost as much of an
    upheaval as removing the statics for the interpreter stacks.

    Incompatible changes

    (Interpreter)
    	- context_state_alloc now takes an additional parameter, as do
    obj_cvp, make_packed_array, parse_real_file_name, ref_stack_store,
    sread/write_proc, terminate_file_name, and a number of other internal
    interpreter procedures.
    	- scan_number now does not mark the result as new.
    	- The _param_list_read/write procedures now take an additional
    gs_ref_memory_t * parameter.
    	- It is no longer possible to store pointers to the interpreter's
    allocator group (gs_dual_memory_t) in structures or variables across a
    garbage collection.
    	- The save_level instance variable is moved from gs_dual_memory_t
    to gs_ref_memory_t.
    	- op_show_finish_setup can now fail.
    	- fname.h is renamed gsfname.h; the procedure names and parameters
    for %device%name file names are changed.
    	- gx_imager_stroke_add now takes an additional argument; a NULL
    value for the device argument of gx_stroke_path_only is no longer valid.
    	- gx_make_clip_translate_device now takes a memory parameter, and no
    container parameter; gx_make_clip_device no longer takes a container
    parameter; gx_mask_clip_initialize and tile_clip_initialize now take a
    memory parameter.

    Documentation

    Fixes problems:
    	- The language documentation still referred to outside clipping.
    (doc/Language.htm)

    Documents the new curve join graphics state parameter.  (doc/Language.htm)

    Documents the fact that the OutputFile device parameter now supports the
    %device%file syntax.  (gp.h, doc/Use.htm)

    Documents the licensing problems related to GNU readline.  (int.mak,
    unix-gcc.mak, gp_gnrdl.c)

    Procedures

    Fixes problems:
    	- The bmpa devices needed gdevppla.  (bug introduced in 5.84)
    (devs.mak)
    	- The bmpa devices were accidentally included in the DEVICE_DEVS
    setting in the distributed fileset.  (unix-gcc.mak)
    	- msvclib.mak was missing some definitions.  (msvclib.mak)

    Adds a CC_NO_WARN macro for those few files that produce tons of warnings
    that we can't work around.  (bcwin32.mak, dvx-gcc.mak, msvccmd.mak,
    openvms.mak, openvms.mmk, os2.mak, ugcclib.mak, unix-gcc.mak, unixansi.mak,
    unixtrad.mak, watcw32.mak, wccommon.mak, devs.mak, lib.mak, zlib.mak)

    Adds version.mak to msvclib.mak, so library clients can track the version.
    (msvclib.mak)

    Utilities

    Fixes problems:
    	- -replace didn't work if it was the last item of a module
    description.  (genconf.c)

    Drivers

    Fixes problems:
    	- CCITTFax-compressed bitmaps sometimes used both a Rows value and
    an end-of-block indicator, which some PostScript implementations don't
    handle properly.  (gdevpsdf.h, gdevps.c, gdevpsdf.c)

    Removes an unused procedure and macro.  (gdevlj56.c)

    Interpreter (PDF)

    Fixes problems:
    	- The interpreter cached objects even if the reference had the wrong
    generation number, causing errors if a correct reference occurred later.
    (lib/pdf_base.ps)
    	- Embedded TrueType fonts using the Macintosh encoding sometimes
    caused an error.  (lib/gs_ttf.ps)

    Interpreter

    Fixes problems:
    	- Multiple contexts were broken (probably since 5.80).  Fixing this
    required adding a parameter to context_state_alloc, to provide systemdict.
    (icontext.h, icontext.c, interp.c)
    	- setpagedevice didn't accept the 4-element PageSize values that
    appear in the InputAttributes dictionary.  (zmedia2.c)
    	- BuildChar/BuildGlyph was "short circuited" even in some cases
    where it wasn't safe to do so.  (ichar.h, zchar.c, zcharout.c)
    	- The show operators didn't properly handle the special case of
    executing within a cshow procedure.  (ichar.h, zcfont.c, zchar.c, zcharx.c)
    	- The -dDOINTERPOLATE switch had gotten broken somehow.
    (lib/gs_init.ps)
    	- The is_identity flag wasn't properly cleared when loading cached
    CIE mapping values, causing incorrect output.  (zcie.c)

    Removes the writable static for the context scheduler.  (zcontext.c)

    Removes the writable static for the interpreter's group of allocators
    (gs_imemory).  This too turned out to be a massive change with many
    NON-BACKWARD-COMPATIBLE changes required in internal procedures.  (bfont.h,
    files.h, fname.h, ialloc.h, ifunc.h, imemory.h, interp.h, iparam.h,
    iparray.h, ipcolor.h, isave.h, iscannum.h, istack.h, istream.h, iutil.h,
    store.h, ialloc.c, icontext.c, idebug.c, idict.c, iinit.c, imain.c,
    imainarg.c, interp.c, iparam.c, ireclaim.c, isave.c, iscan.c, iscanbin.c,
    iscannum.c, isstate.h, istack.c, iutil.c, zarray.c, zbfont.c, zcontext.c,
    zdict.c, zfname.c, zdps.c, zdps1.c, zfcmap.c, zdict.c, zfile.c, zfilter.c,
    zfont.c, zfont0.c, zfproc.c, zfreuse.c, zfunc.c, zfunc0.c, zfunc3.c,
    zgeneric.c, zht2.c, ziodev.c, ziodev2.c, zpacked.c, zpcolor.c, zshade.c,
    zupath.c, zvmem.c)

    Adds a gs_memory_t * argument to obj_cvp.  This is part of the work for
    removing the gs_imemory static: we note it separately because it affects
    code beyond the interpreter.  (iutil.h, gp_gnrdl.c, iutil.c, zfileio.c)

    Updates interpreter code for the addition of new_mask, test_mask, and
    save_level to gs_ref_memory_t, and the removal of save_level from
    gs_dual_memory_t.  (ialloc.h, ialloc.c, isave.c)

    Adds a gs_ref_memory_t * argument to all the _param_list_read/write
    procedures.  (iparam.h, iparam.c, zcrd.c, zdevice.c, zfdctd.c, zfdcte.c,
    zfdecode.c, zfilter2.c, ziodev2.c, zusparam.c)

    Changes the hack in file_alloc_stream that determines whether a gs_memory_t
    * is actually a gs_ref_memory_t *.  The former code tested specifically
    whether the allocator was one of the current interpreter allocators; the new
    code simply tests the procedure vector.  We aren't 100% sure that this
    change will work reliably.  (zfile.c)

    Factors common code out of isave.h and store.h.  (idosave.h, isave.h,
    store.h)

    Removes the reclaim_data member of gs_dual_memory_t, since it is no longer
    useful.  (imemory.h, ialloc.c, ireclaim.c)

    Makes the default InputAttributes and OutputAttributes elements of page
    device dictionaries writable and (if possible) allocated in local VM, to
    work around bugs in the output of Word Perfect.  (lib/gs_setpd.ps)

    Modifies the interpreter's error printout to indicate whether dictionaries
    on the stack(s) are writable.  (lib/gs_init.ps)

    Moves support for %device%name file naming into the library.  (fname.h,
    zfile.c, zfname.c [deleted])

    Adds interpreter support for the new curve join graphics state parameter.
    (zgstate.c)

    Library

    Fixes problems:
    	- bbox_fill_path device didn't interact with compositors correctly.
    (This problem had no practical effect.)  (gdevbbox.c)
    	- kshow didn't check for CID fonts.  (gschar.c)
    	- The bbox and ImageType 3 image enumerators had incorrect GC
    descriptors, possibly causing memory-related crashes.  (gsstruct.h,
    gdevbbox.c, gximage3.c)
    	- gx_make_clip_[translate_]device took an obsolete container
    parameter.  (gxcpath.h, gsshade.c, gxccache.c, gxfill.c, gxstroke.c)
    	- Non-transient clipping devices were used for image clipping, but
    the API didn't support creating them.  (gxcpath.h, gxclip.c, gximage3.c,
    gxipixel.c)
    	- Some devices were created without setting their memory member,
    which caused the GC not to trace pointers to them.  (gxmclip.h, gxclip2.h,
    gxclip2.c, gximage3.c, gxmclip.c, gxp1fill.c)
    	- The bbox device didn't handle ImageType 3 images correctly.
    (gdevbbox.c)
    	- When the bbox device passed a stroke operation to the library, it
    didn't pass the device, causing absolute-length dots to render incorrectly.
    Fixing this required adding a device parameter to the gx_imager_stroke_add
    procedure.  (gxpaint.h, gdevbbox.c, gxpaint.c)
    	- The counter control OtherSubrs (12 and 13) weren't implemented.
    (This probably had no effect.)  (gstype1.c)
    	- Type 1 stem hints with negative widths didn't work properly.
    (gxhint2.c)
    	- The debugging output for hintmask and cntrmask printed the vstem
    and hstem counts in the wrong order.  (gstype2.c)
    	- If the value of the OutputFile device parameter was too long,
    the result could be memory corruption rather than a rangecheck error.
    (gsdevice.c)
    	- The dash pattern pointer in the saved imager state of a band list
    writer could point inside the writer structure, confusing the garbage
    collector.  (gxclist.h, gxclpath.c)

    Adds new_mask, test_mask, and save_level instance variables to
    gs_ref_memory_t.  This too is part of the gs_imemory work: we note it
    separately because it is the only piece of this work that affects the
    library.  (gxalloc.h, gsalloc.c)

    Makes cntrmask at the beginning of a charstring act like vstemhm + cntrmask,
    as with hintmask.  This is not documented, but we see it used this way in
    Type 2 CharStrings.  (gstype2.c)

    Cleans up formatting and macros.  (gp.h)

    Speeds up the bounding box device by skipping path filling if the entire
    path falls within the already-accumulated bounding box, and by defining the
    device as 8-bit gray to avoid halftone computation.  (gdevbbox.c)

    Adds a procedure, gs_show_use_glyph, for implementing the show-in-cshow
    hack.  (gschar.h, gschar.c)

    Moves support for %device%file file naming into the library.  (lib.mak,
    gsfname.h, gxiodev.h, gdevpipe.c, gsfname.c)

    Makes the OutputFile device parameter recognize %device%file syntax, as well
    as "-" and (on platforms that support pipes) |command.  (gp.h, gxdevice.h,
    gdevprn.c, gsdevice.c, gp_unix.c)

    Adds a separate graphics state parameter to indicate how to treat joins
    between segments of a flattened curve, for compatibility with Adobe
    interpreters (which apparently always use bevel joins).  (gsline.h,
    gxclpath.h, gxline.h, gsline.c, gsstate.c, gxclpath.c, gxclrast.c,
    gxstroke.c)

    Changes code slightly, introducing an unnecessary assignment, in order to
    suppress a compiler warning.  (gxclpath.c)

    Tweaks the CIE_LOAD_CACHE_BODY macro slightly.  (gscie.c)

    Version 5.84 (tester) (5/19/99)

    This fileset completes the implementation of planar rendering, and fixes a
    few more bugs, some of them surprisingly old.

    Incompatible changes

    (Drivers)
    	- The dopath vector device implementation procedure was changed to
    take an optional matrix argument.
    (Library)
    	- The internal memory__need_ macros are changed to upper case.

    Procedures

    Fixes problems:
    	- There was a duplicate entry for GENINIT_XE in the Watcom makefile.
    (wctail.mak)

    Adds the duplex-capable LaserJet drivers (ljet3d and ljet4d) to all standard
    configurations.  (bcwin32.mak, dvx-gcc.mak, msvc32.mak, openvms.mak,
    openvms.mmk, os2.mak, unix-gcc.mak, unixansi.mak, unixtrad.mak, watc.mak,
    watcw32.mak)

    Adds a PROFILE compilation switch, similar to DEBUG, to work around the fact
    that gprof under Linux doesn't count time in memset, memcpy, or other C
    library procedures.  PROFILE will substitute our own versions of memset,
    memcpy, and memmove.  Currently, this switch is supported only on Unix.
    (unix-end.mak)

    Defines a new makefile macro, SYNC, that gives the module name for thread /
    synchronization facilities; makes async.dev include this module.  This is
    posync on Unix and VMS platforms, winsync on MS Windows and OS/2 platforms.
    (bcwin32.mak, dvx-gcc.mak, lib.mak, msvc32.mak, msvclib.mak, openvms.mak,
    openvms.mmk, os2.mak, ugcclib.mak, unix-gcc.mak, unixansi.mak, unixtrad.mak,
    watc.mak, watclib.mak, watcw32.mak)

    Splits off the rules common to the 3 Windows makefiles (watc, watclib,
    winlib) into a separate file, defining new modules winplat.dev and
    winsync.dev.  (watc.mak, watclib.mak, winlib.mak, winplat.mak)

    Removes -Wcast-align from the gcc switches, since this produces huge numbers
    of warnings that we will certainly never get rid of.  (unix-gcc.mak)

    Utilities

    Enhances the ps2pdf script with a patch contributed by Jim Avera
    (avera@fjst.com) so that it can be used as a pipe by specifying "-" for the
    input and/or output file.  (lib/ps2pdf)

    Modifies ps2ascii to handle landscape pages better.  (lib/ps2ascii.ps)

    Drivers

    Fixes problems:
    	- PDF output that used Pattern colors on more than one page failed
    to include the color space resource in the resource dictionaries of pages
    other than the first.  (gdevpdf.c)
    	- The PDF writer emitted bitmap patterns inverted in Y.
    (gdevpdfi.c)
    	- The PCL XL driver's GC descriptor had become incorrect, causing
    crashes.  (gdevpx.c)
    	- The pdfwrite driver could still emit coordinates too large for
    Acrobat Reader to handle, for stroked lines with an unusual CTM.
    (gdevpdfd.c)
    	- The pxl drivers emitted invalid output for dashed lines.
    (gdevpx.c)
    	- The [e]pswrite and pxl drivers scaled line widths and dash
    patterns incorrectly.  Fixing this properly involved refactoring the
    handling of scaling for paths, and removing gdev_vector_stroke_path.
    (gdevpsdf.h, gdevvec.h, gdevpdfd.c, gdevps.c, gdevpsdf.c, gdevpx.c,
    gdevvec.c)
    	- The lj5 drivers didn't pad images to a multiple of 4 bytes per
    scan line, producing invalid PCL XL output.  (We don't see how they could
    ever have worked, in fact.)  (gdevpcl.h, gdevlj56.c, gdevpcl.c)

    Adds a user-contributed driver for the DEClaser 2100.  This is a GPL'ed
    driver.  (contrib.mak, gnu/src/gdevln03.c)

    Makes the UsePlanarBuffer parameter, and planar buffering capability, from
    the PPM devices available to general printer devices, but in a separate
    module to avoid making all printer devices require gdevmpla.c.  (gdevppla.h,
    gdevpbm.c, gdevppla.c)

    Adds a UsePlanarBuffer parameter to the async BMP drivers, for testing.
    (gdevbmpa.c)

    Removes the comment about the instability of the "vector" driver interface.
    (gdevvec.h, gdevvec.c)

    Platforms

    Splits off the Windows thread and synchronization primitives into a new file
    and a new module, winsync.dev.  (watc.mak, watclib.mak, winlib.mak,
    gp_win32.c, gp_wsync.c)

    Interpreter

    Fixes problems:
    	- As usual, gcc failed to flag some signed/unsigned char mismatches.
    (gp_gnrdl.c, iutil.c)

    Moves the indexed color space cache lookup procedure from the interpreter to
    the library.  (zcsindex.c)

    Streams

    Fixes problems:
    	- If a 2-D CCITTFax stream ended with 1 or 2 "vertical 0" codes,
    those codes would be ignored.  (scfd.c)

    Library

    Fixes problems:
    	- gsnogc.h contained an extern for gs_gc_reclaim rather than for
    gs_nogc_reclaim.  (gsnogc.h)
    	- Banded images in Indexed color spaces rendered incorrectly.
    (gximage.c)
    	- A function declared some arguments as float rather than floatp.
    (gshtx.h, gshtx.c)
    	- As usual, gcc failed to flag some public/private mismatches.
    (gdevmrun.c)
    	- The tracing output for monobit images printed 8 bits per pixel
    rather than 1 bit per pixel.  (gxidata.c)
    	- A Pn macro was used in a header file that didn't include stdpre.h.
    (gscdefs.h, gconf.c, genht.c, gxhtbit.c, gxclrast.c)
    	- get_bits_rectangle for the planar memory device didn't flush the
    last byte of each row.  (gdevmpla.c)
    	- When banding, Indexed color spaces using a procedure rather than a
    lookup table caused a crash.  (gxcolor2.h, gscolor2.c, gxclrast.c)
    	- When filling a region with a Pattern with a rotated matrix, some
    parts of the region could be missed.  (bug introduced by a fix in 5.38)
    (gxp1fill.c)

    When compiling with gcc, replaces inline with __inline__ to get rid of a
    potential warning.  (stdpre.h)

    Adds our own implementations of memset, memcpy, and memmove, to work around
    the fact that gprof under Linux doesn't count time in C library procedures.
    (memory_.h, string_.h, gsmisc.c)

    Finishes implementing planar rendering for printer / banded devices.
    (gdevprn.h, gxclist.h, gxdevbuf.h, gdevprn.c, gxclread.c)

    Version 5.83 (tester) (5/13/99)

    This fileset was driven mostly by commercial licensee demands; it doesn't
    fix most of the problems reported in 5.82.  It features smaller threshold
    halftones, the ability to store halftones in ROM, and a nearly complete
    implementation of a planar memory device.

    Items pushed off to the next fileset:
    	- Finish multi-planar band buffers (requires changing
    gdev_prn_render_lines to be based on memory devices rather than buffer
    pointers).
    	- For Adobe compatibility, change stroking so that it always uses
    bevel joins between the segments of a curve (this directly contradicts the
    Red Book, but it's what Adobe interpreters do).
    	- Implement an IdiomSet for Corel Draw fountain fills? (idioms.ps)
    	- Change shading so it doesn't install a clip device (make this a
    driver procedure instead), because that prevents clist_fill_path from being
    called.

    Incompatible changes

    (Interpreter)
    	- The spaces.indexed member of a vm_spaces structure has been
    renamed spaces_indexed (a macro).
    	- The gs_reclaim procedure is changed to a macro, GS_RECLAIM.
    (Library)
    	- The bits member of a halftone order is now called bit_data, and is
    opaque; halftone orders are now "objects"; gx_ht_alloc_[ht_]order now take
    an additional argument.
    	- The architectural values in arch.h are now all upper-case.
    (std.h defines lower-case synonyms for backward compatibility.)
    	- The buffer device procedures for printer devices are now collected
    in a structure; this also changes the parameters of clist_init_params.
    	- The parameters of the buffered device setup_buf_device procedure
    are changed.
    	- gx_path_copy_reducing now takes an additional argument, an imager
    state, for flattening stroked paths.
    	- Memory devices now must be created by copying a prototype device,
    rather than by initializing individual members, even if they are only being
    used for limited purposes.

    Documentation

    Documents the new facility for compiled halftones, and the old one for
    compiling initialization files.  (doc/Make.htm)

    Utilities

    Adds a utility for compiling halftones into the executable.  Also defines
    the dependency lists for the auxiliary programs in lib.mak and int.mak,
    rather than replicating them for every platform.  (bcwin32.mak,
    dvx-tail.mak, gs.mak, int.mak, lib.mak, msvctail.mak, openvms.mak,
    openvms.mmk, os2.mak, unix-aux.mak, wctail.mak, genht.c)

    Adds support for halftone "resources" in the makefile.  (genconf.c)

    Adds code to determine the primary and secondary CPU cache sizes
    empirically.  (genarch.c)

    Changes the architecture definition macros from lower to upper case, with
    lower-case synonyms in std.h for backward compatibility.  (gsjconf.h, std.h,
    genarch.c)

    Changes the ps2ai utility so that jtxt3 can be set from the command line, to
    allow pstoedit to generate AI3-compatible output.  (lib/ps2ai.ps)

    Procedures

    Adds some optional library modules to the base library compilation list, so
    that compilation errors won't slip through.  (lib.mak)

    Interpreter

    Fixes problems:
    	- A change from char to byte needed to be undone (gcc didn't catch
    this).  (iutil.c)

    Adds a 167x167 stochastic halftone that CalComp put in the public domain.
    (lib/ht_ccbnm.ps, int.mak, unixinst.mak)

    Updates the interpreter for the change to per-VM-spaces garbage collection.
    (igc.h, ialloc.c, icontext.c, igc.c, ilocate.c, imain.c, interp.c,
    ireclaim.c, isave.c, zfile.c, zht.c, zht1.c, zht2.c)

    Updates places that only use gsstruct.h for extern_st to use gsstype.h
    instead.  (icontext.h, ifont.h)

    Library

    Fixes problems:
    	- Some types needed updating to reflect the change in the string
    freelists.  (gsalloc.c, gsnogc.c)
    	- clip_copy_color didn't initialize some variables in the fastest
    case. (bug probably introduced in 5.83) (gxclip.c)
    	- The fit_fill_ and fit_copy_ macros didn't always parenthesize
    their dev argument.  (gxdevice.h)
    	- The sample_load macros returned the wrong results for depth 1 and
    2.  Amazingly enough, it appears that this case had never been used.
    (gsbitops.h)
    	- The standard allocator would free chunks even if is_controlled was
    true.  (gsalloc.c)
    	- Stroking drew semicircles rather than full circles for round
    joins.  (gxstroke.c)
    	- The calculation of how finely to sample a curve to achieve a
    particular flatness didn't take line width into account when stroking (the
    flatness has to apply to the outside of the stroked curve).  (gxpath.h,
    gxpcopy.c, gxstroke.c)

    Speeds up the bbox device a little.  (gdevbbox.c)

    Speeds up the most common cases of clipping a little.  (gxclip.h,
    gxacpath.c, gxclip.c)

    Makes halftone orders more "object-oriented", so we can use an alternate
    representation that trades time for space.  This requires a
    NON-BACKWARD-COMPATIBLE CHANGE in the gx_ht_order structure and the
    arguments of gx_ht_alloc_[ht_]order.  (gxcldev.h, gxdht.h, gzht.h, gsht.c,
    gsht1.c, gshtscr.c, gshtx.c, gsistate.c, gxcht.c, gxclimag.c, gxclrast.c,
    gxht.c, gxhtbit.c)

    Makes it possible to compile-in halftone threshold arrays and orders (e.g.,
    in ROM) so they don't take up RAM at execution time.  (gscdefs.h, gxdht.h,
    gxdhtres.h, gzht.h, gconf.c, gsht.c, gsht1.c, gxclrast.c, gxhtbit.c)

    Adds some statistics to the 24-bit memory device (in DEBUG mode only, as
    usual).  (gdevm24.c)

    Makes the 24-bit memory device optionally use memcpy for wide rectangle
    fills.  We thought this got us a factor of 3 speedup on a Pentium with gcc's
    library, but it turned out to be a profiler artifact.  (gdevm24.c)

    Cleans up some formatting.  (gxclip.h)

    Dusts off the run-length-encoded memory device, changing it so it reverts to
    the unencoded representation when necessary.  This code hasn't been tested,
    and is not currently used.  (gdevmrun.h, gdevrun.c [deleted], gdevmrun.c)

    Adds more statistics to the clipping device.  (gxclip.c)

    Adds an implementation of the MD5 Algorithm defined in RFC 1321, derived
    directly from the text of the RFC and not from the reference implementation.
    This code uses the zlib license, which is more liberal than the Aladdin or
    GNU licenses.  (md5.h, md5.c)

    Finishes implementing the planar memory device, including generalizing it to
    store varying numbers of bits per plane rather than 1 bit per plane.
    (gdevmem.h, gdevmpla.h, gxdevmem.h, gdevmem.c, gdevmpla.c)

    Updates clients to initialize memory devices more fully, now required to
    distinguish chunky from planar devices.  (gxpcmap.c)

    Mostly implements enhancing printer / banded devices so they can use a
    planar memory device for rendering and/or band buffering.  The code
    currently works only in the non-banded case.  (gdevprn.h, gxclist.h,
    gxdevbuf.h, gxdevcli.h, gdevprn.c, gxclist.c, gxclread.c)

    For testing, adds a -dUsePlanarBuffer=<boolean> parameter to the PPM devices
    to make them use a planar memory device.  (gdevpbm.c)

    Cleans up some code formatting.  (gdevmem.c)

    Makes the garbage collection procedure separately settable for each group of
    VM spaces.  (In an environment with "async" rendering, the renderer has its
    owm VM space group.)  Unfortunately, this involved a NON-BACKWARD-COMPATIBLE
    change in the vm_spaces structure.  (gsgc.h, gsnogc.h, gsnogc.c)

    Updates a client for the change in gs_reclaim; also makes the renderer
    thread use the non-tracing garbage collector.  (gdevprna.c)

    Updates the non-tracing GC to reflect its role as a garbage collection
    procedure in a vm_spaces.  (gsnogc.c)

    Enhances the non-tracing GC so that if a chunk ever contains no strings, the
    string marking area reserved for the tracing GC is added to free space.
    (gxalloc.h, gsalloc.c, gsnogc.c)

    Changes the font cache allocator to use a different structure descriptor for
    its data so that memory dumps will show "font cache bytes" rather than just
    "bytes".  (gxccman.c)

    Splits gsstruct.h into gsstype.h, which contains enough of the definition of
    structure type descriptors to support extern_st, and gsstruct.h, which is
    needed to actually define structure types.  (gsstruct.h, gsstype.h,
    gxfmap.h)

    Updates places that only use gsstruct.h for extern_st to use gsstype.h
    instead.  (gsbitmap.h, gsccolor.h, gscie.h, gxfont.h, gzpath.h, scommon.h,
    gscdevn.c, gscrd.c, gscrdp.c, gsshade.c, gxpath2.c)

    Version 5.82 (tester) (4/24/99)

    This fileset fixes a few odds and ends, removes a couple more writable
    statics, and improves performance in a couple of areas.

    Incompatible changes

    (Interpreter)
    	- dict_uid_param now takes an additional argument, the interpreter
    context pointer.
    	- obj_cvp now takes a stream rather than a string.

    Documentation

    Documents the -dGraphicsAlphaBits and -dTextAlphaBits switches; reorganizes
    the documentation of the -d/-s switches by function.  (doc/Use.htm)

    Procedures

    Fixes problems:
    	- Building with MSVC didn't work if COMPILE_INITS was selected.
    (msvctail.mak)
    	- The cp script didn't work on all MS-DOS systems, since the systems
    are incompatible with each other in undocumented ways.  (cp.bat)
    	- Using ^ in a command line failed on Windows 98.  (wccommon.mak)
    	- Watcom compilation under Windows NT didn't include some needed
    headers.  (wccommon.mak)
    	- The Watcom compiler's quoting requirements were inconsistent.
    (gs.mak)
    	- GLCCWIN was used without being defined.  The MS DOS/Windows
    makefiles really are a tangled mess....  (watc.mak)
    	- The build directories didn't get created automatically when
    compiling with the Watcom compiler.  (watc.mak)

    Adds more optimization switches for Watcom compilation.  (wccommon.mak)

    Utilities

    Adds a pfbtopfa script.  (unixinst.mak, lib/pfbtopfa, lib/pfbtopfa.bat,
    lib/pfbtopfa.ps)

    Drivers

    Fixes problems:
    	- "Vector" drivers (currently only the PCL XL driver) filled
    polygons incorrectly.  (gdevvec.c)
    	- The PCL XL drivers produced incorrect output for images.  (We
    can't understand how they ever could have worked.)  (gdevpx.c)
    	- The PCL XL drivers skipped blank pages.  (gdevpx.c)
    	- The page origin for the clj driver was set incorrectly.  (fix from
    Artifex) (gdevclj.c)
    	- The map_color_rgb procedure for the 32-bit CMYK bmp device was
    wrong, causing RasterOps to produce incorrect output.  (fix from Artifex)
    (gdevbmp.c)

    Works around a bug in Acrobat Reader's Print command, by changing the
    scaling for bitmap patterns.  (gdevpdfi.c)

    Cleans up some formatting and macros.  (gdevpx.c)

    Factors out some common parameter-putting utilities.  (gdevpsdf.h,
    gdevpdfp.c, gdevpsdp.c)

    Platforms

    Fixes problems:
    	- The DLL code "knew" it could only be compiled on Windows and OS/2
    platforms.  (gsdll.c)

    Removes a Mac-specific file that is now moved to the Mac-specific archive.
    (gsdllmac.h [deleted])

    Interpreter (PDF)

    Fixes problems:
    	- An invalidaccess could occur when repositioning the file after
    executing an image XObject.  (lib/pdf_draw.ps)
    	- Indexed color spaces gave an error if the underlying space was
    represented as a name rather than an array.  (bug introduced in 5.80)
    (lib/pdf_draw.ps)

    Interpreter

    Fixes problems:
    	- The interpreter reentrancy changes broke the GNU readline
    interface.  (gp_gnrdl.c, ziodev.c)
    	- The TrappingType resource category wasn't defined.
    (lib/gs_res.ps, lib/gs_trap.ps)
    	- CIE color spaces in shading patterns didn't work.  (lib/gs_ll3.ps)
    	- Printing a string of more than 200 characters with == was broken.
    Fixing this required a NON-BACKWARD-COMPATIBLE change in the argument list
    of obj_cvp.  (bug introduced in 5.80) (iutil.h, gp_gnrdl.c, idebug.c,
    iutil.c, zfileio.c)

    Changes the interpreter trace output to be somewhat more readable.
    (interp.c)

    Makes the linking of the binary token scanning procedure static rather than
    dynamic.  (int.mak, inobtokn.c, iscan.c, zbseq.c)

    Makes the language level a property of the context, eliminating a writable
    static.  (icstate.h, idparam.h, ilevel.h, icontext.c, idparam.c, iinit.c,
    interp.c, zcontext.c, zmisc2.c)

    Updates clients for the change in dict_uid_param.  (zbfont.c, zfcmap.c,
    zpcolor.c, zshade.c)

    Library

    Fixes problems:
    	- There was a signed/unsigned char * mismatch.  (sfxfd.c)
    	- Some very picky compilers complained inappropriately about a
    const/non-const mismatch.  (gxcht.c)
    	- The format of the string freelists didn't allow chunks with more
    than 64K bytes of string area.  (gxalloc.h, gsnogc.c)

    Moves the interface definitions for the memory dump debugging code into a
    header file.  (gxalloc.h, gsalloc.c)

    Makes the standard memory manager recognize more effectively when it can
    reset the high-water mark for occupied space in the current chunk.  This
    turns out to make a big difference in preventing sandbars.  (gxalloc.h,
    gsalloc.c)

    Makes clipping lists keep track of their minimum and maximum X values, so
    that they can return accurate outer clipping boxes, which in turn allows
    more effective pre-clipping of filled regions.  (gxcpath.h, gxacpath.c,
    gxclip.c, gxcpath.c)

    Makes clipping devices cache their clipping box, so they can return it
    quickly.  (gxcpath.h, gxclip.c)

    Makes the colored halftone logic check bounding boxes before running the
    expensive algorithms.  This improves performance dramatically for some files
    without costing much for the rest.  (gxcht.c)

    Adds some more debugging printout for clipping lists.  (gxcpath.c)

    Cleans up formatting and macros.  (gdevdflt.c, gdevhit.c, gdevnfwd.c)

    Factors out some common parameter-putting utilities.  (gsparamx.h,
    gsparamx.c, gstrap.c)

    Adds some more tracing output for images.  (gxidata.c)

    Version 5.81 (tester) (4/14/99)

    This fileset cleans up most of the bug tail from 5.80, but it doesn't fix
    all the reported problems.  It also factors out the platform-specific DLL
    calls, and extends the DLL API to the Mac.

    Incompatible changes

    (Platforms)
    	- gsdll_get_bitmap is now defined in gsdllos2.h; gsdll_copy_dib,
    _copy_palette, _draw, and _get_bitmap_row are now defined in gsdllwin.h.

    (Interpreter)
    	- zcolor_remap_one may return 0 rather than o_push_estack.  (This
    change actually occurred in 5.80, but was not documented.)

    (Library)
    	- The initialized parameters of an image scaling filter are now
    stored in a subsidiary structure.
    	- The names max_support and log2_max_support are changed to
    MAX_ISCALE_SUPPORT and LOG2_MAX_ISCALE_SUPPORT.
    	- The structure definition for the smoothed image scaling filter is
    now private, although its descriptor remains public.
    	- The criteria for when to use Interpolate are now more stringent.

    Procedures

    Fixes problems:
    	- gs_trap.ps wasn't installed by `make install'.  (unixinst.mak)
    	- A semicolon was missing in one definition of GS_LIB_DEFAULT.
    (watc.mak)
    	- ll.tr and _temp_.tr weren't created in the obj directory.
    (watc.mak, wctail.mak)
    	- RM_ was defined incorrectly on one platform.  (wccommon.mak)

    Utilities

    Makes some minor edits in ansi2knr, contributed by a user, to remove gcc
    warnings.  (ansi2knr.c)

    Drivers

    Fixes problems:
    	- There was an int/uint mismatch.  (gdevbmpa.c)
    	- There was a const/non-const mismatch.  (gdevbmpa.c)

    Changes the p*m drivers so that they use the default color mapper when
    possible, speeding up execution.  (gdevpbm.c)

    Fonts

    Adds Black as indicating that a bold font should be substituted if
    necessary.  (lib/gs_fonts.ps)

    Platforms

    Fixes problems:
    	- The Watcom NT compiler implements setmode and fileno but not
    _setmode and _fileno.  (gp_ntfs.c)
    	- The procedure parameter passed to the Windows _beginthread
    procedure had the wrong prototype.  (gp_win32.c)
    	- Watcom's _beginthread procedure takes an extra argument.
    (windows_.h, gp_win32.c)

    Extends the DLL API to work on the Mac.  This required some restructuring of
    the code, and some NON-BACKWARD-COMPATIBLE changes to move
    environment-specific calls into environment-specific header files.
    (pcwin.mak, os2.mak, winint.mak, dwdll.h, gsdll.h, gsdllmac.h, gsdllos2.h,
    gsdllwin.h, dpmainc.c, dwdll.cpp, dwnodll.cpp, gdevmswn.c, gdevpm.c,
    gdevwdib.c, gsdll.c)

    Interpreter (PDF)

    Changes the interpreter to handle two more specification-violating
    conditions that Adobe Acrobat accepts: truncation of %%EOF to %%EO, and use
    of Dest links with no Dests dictionary.  (lib/pdf_main.ps)

    Interpreter

    Fixes problems:
    	- gcc failed to flag initialization of an automatic aggregate, which
    is allowed in neither ANSI nor traditional C.  (iutil.c)
    	- The system name table lacked the last 3 entries.
    (lib/gs_btokn.ps)
    	- Interpolated images always wound up at (0, 0).  (bug introduced in
    5.80) (gxipixel.c)
    	- The Watcom compiler didn't consider "const uint" and "const
    unsigned" to be compatible.  (ifunc.h)
    	- The code to detect identity transfer functions could cause
    transfer functions not to be processed at all.  (icolor.h, zcolor.c,
    zcolor1.c, zht2.c)
    	- The Level 2 redefinition of restore could do an extra grestore,
    possibly creating a temporary reference to a freed object.  (zdevice2.c)

    Adds more tracing for undo-saves, and changes a macro to a procedure.
    (isave.c)

    Removes some #define'd casts.  (isave.c)

    Library

    Fixes problems:
    	- When banding, the color space wasn't reinitialized for each page.
    (gxclist.c)
    	- The criterion for allowing image interpolation still produced
    "mush" for some important classes of image.  (gxiscale.c)
    	- The Watcom compiler didn't consider "const uint" and "const
    unsigned" to be compatible.  (gscdefs.h, gconf.c)
    	- Identity black generation and undercolor removal functions weren't
    passed through the band list correctly.  (gxcldev.h, gxclbits.c, gxclrast.c)
    	- Once again, gcc failed to give a warning for extern followed by
    private.  (gxcdevn.h)
    	- glyphshow set up the text operation in a way that created a
    garbage collector error.  (gschar.c)

    Makes gs_opendevice complete the device procedure vector if the device
    wasn't already open.  (gsdevice.c)

    Factors out the image scaling filter so that we can use either Adobe's
    algorithm or the Mitchell filter.  This involves a NON-BACKWARD-COMPATIBLE
    CHANGE in the way the filter parameters are defined.  (gximage.h, siscale.h,
    sisparam.h, gxclimag.c, gxidata.c, gxiscale.c, siscale.c)

    Makes the criteria for when to use interpolation stricter, since we are
    still using the Mitchell filter.  (gxiscale.c)

    Starts to implement Adobe's image interpolation algorithm.  (siinterp.h,
    siinterp.c, gxiscale.c)

    Speeds up RGB interpolated images by detecting runs of output color.
    (gxiscale.c)

    Makes the default RGB color mapper a "known" mapper that can be propagated
    through device pipelines.  (gxdevice.h, gsdevice.c)

    Version 5.80 (tester) (4/6/99)

    This version contains the first, and, we hope, largest wave of changes in
    the interpreter required to make the interpreter fully reentrant.
    Unfortunately, many externally visible APIs, including the argument list for
    operator procedures, required changes.

    Because of the magnitude of the change, we incremented the version number to
    5.80.

    The non-backward-compatible API changes were confined to the interpreter:
    the (very minor) changes to the library required to support interpreter
    reentrancy are fully backward-compatible.

    This fileset also implements DeviceN color spaces (always using the
    alternate space), including Indexed spaces over DeviceN spaces, for all uses
    except smooth shading.

    Incompatible changes

    (Interpreter)
    	- names_init now takes a gs_ref_memory_t * rather than a gs_memory_t
    *.
    	- type_print_strings, type_name_strings, and
    ref_type_properties_data are now REF_TYPE_DEBUG_PRINT_STRINGS,
    REF_TYPE_NAME_STRINGS, and REF_TYPE_PROPERTIES_DATA.
    	- The undocumented .writecvp operator, and obj_cvp, now take an
    integer instead of a Boolean to define the type of output desired.
    	- The argument list for operators is changed from os_ptr to
    i_ctx_t *.  Many internal interpreter APIs have changed.
    	- The typedef name for operator procedures is changed from op_proc_p
    to op_proc_t.
    	- gs_interpret now takes an additional context (i_ctx_t **)
    argument.
    	- The interpreter's rescheduling and time-slicing procedures,
    gs_interp_reschedule_proc and gs_interp_time_slice_proc, now take a context
    (i_ctx_t **) argument.
    	- The Type 1 interpreter push_value callback is renamed push_values;
    the first argument of push_values and pop_value has changed from
    gs_font_type1 * to void *.
    	- dict_put*, dict_copy*, dict_undef, dict_resize, dict_grow, and
    dict_unpack now take an additional argument, a dictionary stack where the
    dictionary may be present.

    Procedures

    Fixes problems:
    	- The dependency list for the (dummy) trapping feature was wrong.
    (int.mak)
    	- The directory for jerror_.h was incorrect.  (jpeg.mak)

    Removes the never-used -header switch from genconf.  (genconf.c)

    Adds priority-sorted resources to genconf, currently used only for image
    classes.  (genconf.c)

    Adds an imageclass resource to genconf, for what used to be called image
    strategies.  (genconf.c)

    Utilities

    Fixes problems:
    	- ansi2knr didn't recognize id1(id2, xxxxx) as not being a function.
    (ansi2knr.c)
    	- viewpcx still referred to the deleted PCXDecode filter.
    (lib/viewpcx.ps)
    	- strlen was called without being declared.  (genarch.c)

    Drivers

    Fixes problems:
    	- Some drivers that called gdev_prn_open_printer didn't check the
    return code for errors.  (gdevdjet.c, gdevhl7x.c)
    	- The cljet5 driver didn't handle long-edge feed properly.  (from
    Artifex) (gdevclj.c)
    	- The [e]pswrite driver could produce incorrect output if the input
    file had zero-length lines.  (gdevps.c)
    	- The X driver didn't handle byte-swapped 16-bit displays.
    (gdevx.c)
    	- There was an int/uint mismatch.  (gdevbmp.c)
    	- Some needed headers weren't included.  (gdevdcrd.c, gdevpdfo.c)
    	- The updated mswinpr2 driver wouldn't compile with older Windows
    header files.  (gdevwpr2.c)

    Removes some unnecessary #includes.  (gdevps.c)

    Adds user-contributed drivers for the CoStar LabelWriter II Plus and XL
    label printers.  (gdevcslw.c)

    Speeds up color mapping for the bitrgb driver a little, by using the default
    procedure.  (gdevbit.c)

    Fonts

    Fixes problems:
    	- TrueType fonts with odd-length glyf definitions caused an
    invalidfont error.  (lib/gs_ttf.ps)

    Changes the font substitution mechanism slightly to be more useful to the
    PDF interpreter.  (lib/gs_fonts.ps)

    Platforms

    Fixes problems:
    	- Some needed headers weren't included.  (watc.mak, watclib.mak,
    winlib.mak, gp_win32.c)

    Interpreter

    Fixes problems:
    	- There were many signed/unsigned char type errors that gcc didn't
    catch.  (gp_gnrdl.c)
    	- The operator definition list for zdouble was too long.  (int.mak,
    zdouble.c)

    Removes some unnecessary #includes.  (zchar.c)

    Speeds up names_string_ref.  (inamedef.h, inames.h, imain.c, iname.c)

    Speeds up reading string/name array parameters.  (iparam.c)

    Refactors the implementation of ==, so that all types other than arrays and
    dictionaries are handled in C code.  (lib/gs_init.ps, iutil.h, iref.h,
    gp_gnrdl.c, idebug.c, iutil.c, zfileio.c, ztype.c)

    Changes the type name for operator procedures from op_proc_p to op_proc_t,
    for consistency and also to help detect places that need the argument list
    changed.  (ichar.h, interp.h, iref.h, opdef.h, interp.c, iutil.c, zchar.c,
    zcharx.c, zcontrol.c, zupath.c)

    Changes the argument type for operators from os_ptr to i_ctx_t *.  (i_ctx_t
    is an alias for gs_context_state_t.)  This also requires adding a context
    pointer to many internal procedures, or changing an os_ptr argument to
    i_ctx_t *.  This is a MASSIVE NON-BACKWARD-COMPATIBLE change which we simply
    saw no way to avoid if the interpreter was to be made fully re-entrant.  See
    "Incompatible changes" above for externally visible changes.
    (lib/gs_init.ps, bfont.h, btoken.h, dstack.h, estack.h, files.h, ichar.h,
    ichar1.h, icharout.h, icie.h, icolor.h, icontext.h, icsmap.h, ifilter.h,
    ifont1.h, igstate.h, iht.h, iimage.h, iimage2.h, imain.h, imemory.h,
    interp.h, ipacked.h, iref.h, iscan.h, istream.h, opdef.h, oper.h,
    opextern.h, ostack.h, ialloc.c, icontext.c, iinit.c, imain.c, inouparm.c,
    interp.c, ireclaim.c, iscan.c, iscanbin.c, zarith.c, zarray.c, zbfont.c,
    zbseq.c, zcfont.c, zchar.c, zchar1.c, zchar2.c, zchar32.c, zchar42.c,
    zcharout.c, zcharx.c, zcid.c, zcie.c, zcolor.c, zcolor1.c, zcolor2.c,
    zcontext.c, zcontrol.c, zcrd.c, zcsdevn.c, zcsindex.c, zcspixel.c,
    zcssepr.c, zdevice.c, zdevice2.c, zdict.c, zdosio.c, zdouble.c, zdpnext.c,
    zdps.c, zdps1.c, zfbcp.c, zfcmap.c, zfdctd.c, zfdcte.c, zfdecode.c, zfile.c,
    zfileio.c, zfilter.c, zfilter2.c, zfilterx.c, zfont.c, zfont0.c, zfont1.c,
    zfont2.c, zfont32.c, zfont42.c, zfproc.c, zfreuse.c, zfunc.c, zfzlib.c,
    zgeneric.c, zgstate.c, zhsb.c, zht.c, zht1.c, zht2.c, zimage.c, zimage2.c,
    zimage3.c, ziodev.c, ziodev2.c, zmath.c, zmatrix.c, zmedia2.c, zmisc.c,
    zmisc1.c, zmisc2.c, zmisc3.c, zpacked.c, zpaint.c, zpath.c, zpath1.c,
    zpcolor.c, zrelbit.c, zrop.c, zshade.c, zstack.c, zstring.c, zsysvm.c,
    ztoken.c, ztrap.c, ztype.c, zupath.c, zusparam.c, zvmem.c, zvmem2.c)

    Changes caching for the interpreter's CIE color spaces so that instead of
    changing the color space installation procedure to one that schedules the
    sampling of the procedures though a back door, it leaves the installation
    procedure alone and schedules the sampling in the color-space-specific
    setcolorspace operator.  This is needed for interpreter reentrancy.
    (icie.h, zcie.c, zcrd.c)

    Makes the linkage from the dictionary machinery to the cached values in the
    dictionary stack and the name table explicit, by adding a dstack pointer to
    all the relevant dict_* procedures.  This is needed for interpreter
    reentrancy.  (iddstack.h, idict.h, idstack.h, idict.c)

    Updates clients for the change in the dictionary API.  For each changed
    dict_ procedure, we add an idict_ procedure that uses i_ctx_p->dict_stack as
    the additional argument.  (iddict.h, icontext.c, iinit.c, interp.c,
    iparam.c, iscanbin.c, zdps.c, zfcmap.c, zdict.c, zfont.c, zfont0.c,
    zgeneric.c, zht2.c, zmisc2.c)

    Changes Pattern color remapping so that it saves information in the
    interpreter's part of the graphics state, rather than manipulating the
    e-stack directly.  This is needed for interpreter reentrancy.  (errors.h,
    icremap.h, igstate.h, interp.c, zgstate.c, zpcolor.c)

    Adds to the "main instance" structure a pointer to the currently executing
    context.  This is needed for interpreter reentrancy.  (imain.h, iminst.h,
    main.h, imain.c, imainarg.c)

    Changes the argument list for operator initialization procedures from void
    to i_ctx_t *.  (opdef.h, ireclaim.c, zbfont.c, zbseq.c, zcontext.c, zfile.c,
    zfont.c, zpcolor.c)

    Changes the initialization of the interpreter's allocators so it doesn't
    presume the allocator structure is global.  (ialloc.h, ialloc.c, imain.c)

    Factors out the structure definition of the stacks, which is needed for
    defining the state of a context, from the API, which is only needed by
    actual clients.  (icstate.h, idsdata.h, idstack.h, iesdata.h, iestack.h,
    iosdata.h, iostack.h, isdata.h, istack.h)

    Changes filter error reporting so that the report_error procedure doesn't
    need access to the interpreter.  (interp.h, interp.c, zfile.c, zfileio.c)

    Completes the implementation of DeviceN color spaces at the interpreter
    level.  (lib/gs_res.ps, lib/gs_lev2.ps, lib/gs_ll3.ps, icsmap.h, zcsdevn.c,
    zcsindex.c, zcssepr.c, zimage.c)

    Speeds up color mapping for identity transfer, BG, or UCR functions.
    (zcolor.c)

    Interpreter (PDF)

    Fixes problems:
    	- The L range for Lab color spaces was wrong.  (lib/pdf_draw.ps)
    	- Images in Lab color spaces came out all black.  (lib/pdf_draw.ps)

    Improves the font substitution mechanism slightly.  (lib/pdf_font.ps)

    Streams

    Adds an error string to the stream state structure, which stream
    implementations can set when returning an error.  The motivation is to allow
    the PostScript interpreter to put this into $error.errorinfo.  (scommon.h,
    stream.c)

    Library

    Fixes problems:
    	- The S_ISCHR fix in 5.73 had a typo.  (stat_.h)
    	- The garbage collector traced dash pattern pointers even if the
    pattern had no elements.  (gzline.h, gsistate.c)
    	- Always tracing the clip_path element of gx_device_clist for
    garbage collection could cause crashes, because this pointer could be stale.
    However, we have to trace this pointer if an image is being processed.
    (gxclist.c)
    	- A close-brace was positioned incorrectly.  (No effect on the
    working of the code.)  (gximage3.c)
    	- Some macros caused some compilers to complain about functions that
    didn't return values.  (gsmemlok.c)
    	- A procedure vector wasn't declared const.  (gsmemlok.c)
    	- Some needed headers weren't included.  (gscrdp.c)
    	- A const pointer was being treated as non-const.  (gxcpath.c)
    	- The algorithm for choosing halftone cell dimensions required an
    unreasonably close angle tolerance (0.01 degrees, rather than 1% of a
    90-degree possible difference).  (gshtscr.c)

    Speeds up arcs a little more.  (gspath1.c)

    Removes some unnecessary #includes.  (gxclpath.h, gxcpath.h, gzcpath.h,
    gxccman.c, gxclip.c, gxcpath.c, gxi12bit.c, gxicolor.c, gxifast.c,
    gximono.c, gxiscale.c, gxpcmap.c)

    Cleans up some formatting.  (gxpath.c)

    Re-enables image interpolation for images that have at least 8 bits of input
    data per pixel.  This is still a compromise....  (gxiscale.c)

    Enhances the default implementation of parameter lists so that a C parameter
    list can forward unrecognized param_read calls to another parameter list.
    This allows constructing incrementally modified parameter lists for internal
    purposes.  (gsparam.h, gscparam.c)

    Changes the first argument of the Type 1 charstring interpreter push_value
    (which is renamed push_values) and pop_value callbacks from the font pointer
    to an arbitrary pointer passed in to the interpreter.  This is needed for
    PostScript interpreter reentrancy.  (gstype1.h, gxfont1.h, gxtype1.h,
    gstype1.c, gxtype1.c)

    Adds an allocator wrapper that calls a closure to attempt to free up memory
    if an allocation fails.  This is used for asynchronous operation (waiting
    for the page queue to empty) and operation with an optional disk for the
    band list.  (gsmemret.h, gsmemret.c)

    Adds the retrying wrapper to the malloc allocator.  (gsmalloc.c)

    Makes "async" printer devices use the retrying wrapper.  (gdevprna.c)

    Makes clist_fill_parallelogram recognize rectangles.  This makes a big
    difference for images rotated 90 degrees.  (gsrect.h, gdevddrw.c,
    gxclpath.c)

    Arranges to construct the list of image classes (formerly called strategies)
    statically rather than dynamically.  (lib.mak, gscdefs.h, gxiclass.h,
    gximage.h, gconf.c, gxi12bit.c, gxicolor.c, gxifast.c, gximono.c,
    gxipixel.c, gxiscale.c)

    Implements Indexed color spaces for high-level image banding.  (gxclist.h,
    gxclpath.h, gxclimag.c, gxclrast.c)

    Arranges to construct the blank bitmap for colored patterns statically
    rather than dynamically.  (gsbitmap.h, gxbitmap.h, gxcht.c)

    Changes FORCE_STRIP_HALFTONES from a #define to a static Boolean.
    (gshtscr.c)

    Implements alternate-space DeviceN color spaces.  (gscspace.h, gxcdevn.h,
    gscdevn.c)

    Implements DeviceN color spaces for images.  (gximage.h, gsimage.c,
    gxi12bit.c, gxicolor.c, gxidata.c, gximage3.c, gximono.c, gxipixel.c)

    Speeds up color mapping a bit.  (gxfmap.h, gsdevice.c, gsstate.c,
    gxclbits.c, gxclrast.c, gxcmap.c)

    Version 5.73 (tester) (3/19/99)

    This fileset fixes a few bugs and adds a couple of minor performance
    improvements.  Its purpose is to fix a fairly serious memory management bug
    and a Microsoft-platform compilation problem, both introduced in 5.72.

    Incompatible changes

    (Library)
    	- Removes the restriction on device registration that was introduced
    in 5.72.
    	- gx_[c]path_scale_exp2 are replaced by gx_[c]path_scale_exp2_shared.

    Documentation

    Identifies GNU readline support as user-contributed, and adds the author's
    name.  (int.mak, unix-gcc.mak, gp_gnrdl.c)

    Notes that an edit is required for GNU readline for AIX.  (doc/Make.htm)

    Changes the bug reporting e-mail address to bug-gs@aladdin.com.
    (doc/Bug-form.htm, doc/New-user.htm, doc/Use.htm, imainarg.c)

    Procedures

    Adds FEATURE_DEVS_EXTRA and DEVICE_DEVS_EXTRA, reserved for setting from the
    command line.  (gs.mak)

    Drivers

    Fixes problems:
    	- A needed cast was missing.  (gdevx.c)

    Interpreter

    Fixes problems:
    	- A needed cast was missing.  (zfname.c)
    	- The CFF loader didn't handle empty subsections correctly.
    (lib/gs_cff.ps)
    	- GNU readline gave an error, rather than expanding the input
    buffer, when called in response to %lineedit.  (files.h, zfileio.c,
    ziodev.c)
    	- GNU readline wasn't always initialized, causing a crash when an
    attempt was made to shut it down.  (iminst.h, imain.c)

    Adds more tracing to the CFF loader.  (lib/gs_cff.ps)

    Adds some deconstifying casts to compensate for broken headers in the GNU
    readline package.  (gp_gnrdl.c)

    Library

    Fixes problems:
    	- The bounding box device didn't ignore filling paths consisting
    only of a moveto.  (gdevbbox.c)
    	- Some systems have S_IFCHR but not S_ISCHR.  (stat_.h)
    	- The clipping list accumulator didn't merge single rectangles
    correctly.  (gxacpath.c)
    	- The clipping list accumulator wasn't aggressive enough about
    merging rectangles.  (Performance effect only.)  (gxacpath.c)
    	- The page wasn't cleared when installing a new device. (bug
    introduced in 5.72) (gsdevice.c)
    	- With graphics anti-aliasing enabled, executing clip or eoclip
    followed by fill or stroke produced incorrect output.  (bug introduced
    between 5.10 and 5.50) (gxpath.h, gspaint.c, gxcpath.c, gxpath2.c)
    	- The garbage collector could crash if any banded devices were
    active.  (bug introduced in 5.72) (gdevprn.c)

    Changes memory management for device instances to allocate the structure
    type objects dynamically.  This gets rid of a static, and also gets rid of
    the requirement that device prototypes be registered, at the expense of an
    extra copy of the (small) structure type object per instance of certain
    devices.  (gscdefs.h, gxdevcli.h, gxdevice.h, gconf.c, gsdevice.c)

    Disables image interpolation for all high-resolution images, not just
    black-and-white, since this produces better-looking output.  (gxiscale.c)

    Speeds up path bounding box computation a little.  (gxpath2.c)

    Speeds up clipping a little.  (gxclip.c)

    Cleans up formatting a bit.  (gxacpath.c)

    Adds support for libpng version 1.0.3, but (for now) updates only the
    OpenVMS and Unix makefiles to use it.  (libpng.mak, openvms.mak,
    openvms.mmk, ugcclib.mak, unix-gcc.mak, unixansi.mak, unixtrad.mak)

    Attempts to work around picky compilers that don't allow assigning T[M][N]
    to const T[M][N].  (gxcht.c)

    Version 5.72 (tester) (3/17/99)

    This fileset finally gets rid of the need to have jpeg, libpng, or zlib
    source code on Unix systems that already have these libraries available.  It
    also starts to add support for general DeviceN color spaces.

    Works in progress:
    	- Fix Fontmap -> Fontmap.GS link, which VMS can't handle.
    	- Make x11alpha do real alpha blending.
    	- spdiff.c is unfinished, partly wrong.
    	- DeviceN support is in progress.  In gxcht.c, set_ht_colors_le_4
    and set_color_ht_gt_4 don't have any way to color-map >4 planes.

    Incompatible changes

    (Interpreter)
    	- The str argument of arg_push_memory_string is no longer const.
    	- The last argument of print_reloc is now const.

    (Library)
    	- Clients should never call the device open_device or close_device
    procedure directly: they should call gs_opendevice or gs_closedevice.
    	- The fn_free_functions procedure has been made private.
    	- The first argument of gs_currentpoint is no longer const.
    	- References to header files in the third-party libraries must now
    include a trailing _, i.e.: jerror_.h jmorecf_.h jpeglib_.h png_.h zconf_.h
    	- IJG JPEG library versions before v5a are no longer supported.
    	- ilog2 replaces small_exact_log2.
    	- Support for "outside" clipping has been removed.
    	- Clients that define their own devices now must either register
    them in the makefile (using the SET[P]DEV[2] macros) or set the stype
    pointer in the static prototype to the correct structure type (or at least a
    structure type with the correct procedures).

    Documentation

    Clarifies the fact that clients should never call the device open_device or
    close_device procedure directly.  (doc/Drivers.htm)

    Updates contact information for Artifex Software.  (doc/Commprod.htm,
    doc/New-user.htm)

    Clarifies the fact that Aladdin did not write gdevcdj.c.  (gdevcdj.c)

    Documents the new -TTYPAUSE switch.  (doc/Use.htm)

    Adds SCO OpenServer 5.0.5 to the list of systems where Ghostscript is known
    to build.  (doc/Make.htm)

    Notes that the MIPSpro 7.2.1.3m compiler produces incorrect output.
    (doc/Make.htm)

    Procedures

    Fixes problems:
    	- The Unix install directory ($(gsdatadir)) and the Unix default
    search path ($(gsdatadir)/lib) weren't compatible.  (bug introduced since
    5.50) (unixinst.mak)
    	- The compilation rule for echogs omitted a dependency and also
    failed to specify a directory for header files.  (unix-aux.mak)
    	- Third-party library source code was required even if the
    corresponding SHARE_xxx option was set to 1.  (devs.mak, gs.mak, int.mak,
    lib.mak, jpeg.mak)

    Adds a -dTTYPAUSE switch to cause .confirm to read from /dev/tty instead of
    stdin, useful when the data input is a pipe.  (lib/gs_init.ps)

    Utilities

    Fixes problems:
    	- Some preprocessor macros were defined twice on VMS.  (echogs.c)
    	- traceop.ps didn't build operator-tracing procedures in global VM.
    (This didn't matter before we introduced local pseudo-operators.)
    (lib/traceop.ps)
    	- geninit produced invalid output or hung if the input files didn't
    have the correct EOL representation for the platform.  (geninit.c)

    Updates a (probably otherwise obsolete) file for the deletion of the private
    JPEG library error message table.  (bughunt.sh)

    Drivers

    Fixes problems:
    	- A procedure returning void tried to return a value.  (gdevtfax.c)
    	- For 24-bit displays, XGetImage can return an image in which
    bits_per_pixel is 32 rather than 24, which is not at all obvious from the
    documentation; also, the bit and byte ordering may not be MSBFirst.
    (gdevx.c)
    	- XFree takes a char *, not a void *.  (gdevx.c)
    	- The fix in 5.71 to adjust the width of TIFF images introduced
    another bug.  (gdevtfax.c)
    	- If the X driver used a standard colormap, pixel values 255 and
    less didn't map back to RGB properly. (bug introduced in 5.71) (gdevxcmp.c)
    	- The ForceMono addition to gdevbit.c (in 5.71) was incorrect.
    (gdevbit.c)
    	- There was a const mismatch in an extern.  (gdevxalt.c)
    	- Third-party library source code was required even if the
    corresponding SHARE_xxx option was set to 1.  Fixing this required
    referencing all third-party library header files through *_.h files.
    (gdevjpeg.c, gdevpdfi.c, gdevpng.c, gdevpsdi.c, gdevpsdp.c)
    	- There was no way to cause the bounding box device to give up its
    reference to the target.  (gdevbbox.h, gdevbbox.c)
    	- pdfwrite crashed if given a 12-bit-per-sample CMYK image when
    ConvertCMYKImagesToRGB was true, and produced invalid output for other
    12-bit-per-sample images (PDF limits bits-per-sample to 8).  (gdevpsdi.c)
    	- pdfwrite mangled planar images if bits-per-sample was other than
    8.  (bug introduced since 5.50) (gdevpdfi.c)

    Changes some code to reduce compiler warnings about casts discarding const.
    (gdevxalt.c)

    Removes a test that allowed referencing the statically allocated instance of
    the alternative X drivers.  (gdevxalt.c)

    Changes a reference to small_exact_log2.  (gdevsvga.c)

    Greatly improves the PDF writer's handling of simple pattern fills, by
    retaining them as pattern fills.  (gdevpdfx.h, gdevpdf.c, gdevpdfi.c)

    Fonts

    Fixes problems:
    	- Cn in a font name wasn't recognized as indicating a condensed
    font.  (lib/gs_fonts.ps)

    Interpreter

    Fixes problems:
    	- Third-party library source code was required even if the
    corresponding SHARE_xxx option was set to 1.  Fixing this required
    referencing all third-party library header files through *_.h files.
    (zfdctd.c, zfdcte.c)
    	- An /undefined error occurred on floating point numbers whose
    integer part exceeded the size of a long (normally 31 bits) and that also
    included a fraction.  (iscannum.c)
    	- ialloc.c included gxarith.h unnecessarily.  (ialloc.c)

    When opening a terminal for reading, always sets the buffer size to 1.  This
    does not apply to %stdin, %lineedit, or %statementedit.  (zfile.c)

    Changes code to use the new deconstifying freeing procedures, to remove
    deconstifying casts.  (gsargs.h, ialloc.h, gsargs.c, zfname.c, zfunc.c)

    Adds a writable packed ref pointer variant to ref.value, to remove compiler
    warnings about casts discarding const.  (igc.h, iref.h, idict.c, igc.c,
    igcref.c)

    Changes the help printouts to use the new printf_program_ident procedure.
    (imainarg.c)

    Generalizes clients to handle color spaces that may have more than 4
    components.  (zcsdevn.c, zcsindex.c, zcssepr.c, zdpnext.c, zfdecode.c)

    Removes support for outside clipping, which we implemented only because we
    misinterpreted a requirement.  (zpath.c)

    Interpreter (PDF)

    Fixes problems:
    	- Selecting a colored Pattern color space caused an error.
    (lib/pdf_draw.ps, lib/pdf_ops.ps)
    	- Reading data from a subfile with no filter caused an error.
    (lib/pdf_base.ps)

    Allows mask images to omit BitsPerComponent: Acrobat Reader accepts this
    even though the PDF specification requires it to be present (with value =
    1).  (lib/pdf_draw.ps)

    Streams

    Fixes problems:
    	- The PixelDifference filters didn't propagate leftover bits in the
    last byte of a row. (bug probably introduced in 5.60) (spdiff.c)
    	- The 1- and 2-bit-per-pixel PixelDifferenceEncode filters were
    broken.  (spdiff.c)

    Changes code slightly to remove a warning about an uninitialized variable.
    (spdiff.c)

    Extends the PixelDifference filters to handle more than 4 Colors.
    s_PDiff_max_Colors is the maximum value.  (spdiffx.h, spdiff.c)

    Adds a stream for converting 12-bit samples to 8-bit.  (gdevpsds.h,
    gdevpsds.c)

    Gets rid of the no longer needed private copy of the JPEG error message
    table.  (sdcte.c, sdeparam.c, sjpegerr.c [deleted], sjpegc.c)

    Library

    Fixes problems:
    	- If a 1-bit-per-pixel image terminated early, the last few scan
    lines might not be written out.  (gxidata.c)
    	- The bbox device could leave its target in a half-open state,
    because it called the open/close_device procedures directly rather than
    going through gs_open/closedevice.  We "fixed" this by making this device
    forward open and close, but conditionally, so that clients can choose.
    (gdevbbox.c)
    	- Third-party library source code was required even if the
    corresponding SHARE_xxx option was set to 1.  Fixing this required
    referencing all third-party library header files through *_.h files.
    (sdcparam.c, sdctc.c, sdctd.c, sddparam.c, sjpegc.c, sjpegd.c, sjpege.c,
    sjpegerr.c)
    	- Low-memory recovery in the band list writer sometimes didn't work,
    because a test was backwards.  (gxcldev.h, gxclist.c)
    	- Executing a put_params during band rasterizing didn't update
    cached values in the imager state.  This was probably not a problem in
    practice, since the only parameters that affect cached values (device color
    space, depth, and color mapping) were very rarely set.  (gxclrast.c)
    	- Converting 12-bit planar images to chunky format could store
    beyond the end of the output area and corrupt memory.  (gsflip.h, gsflip.c)
    	- The algorithms for converting 4-plane, 1- and 2-bit planar images
    to chunky format were wrong.  (gsflip.c)
    	- Images that lay entirely outside the page could cause a memory
    access error.  (gxclimag.c)
    	- The bbox device could return excessively conservative values for
    stroked paths.  (gxpaint.h, gdevbbox.c, gxpaint.c, gxstroke.c)
    	- Banding devices now include some pointers that the garbage
    collector must trace.  (gdevprn.h, gxclist.h, gxdevice.h, gdevprn.c,
    gsdevice.c, gxclist.c)

    Adds a gs_opendevice procedure to mirror gs_closedevice.  (gsdevice.h,
    gsdevice.c)

    Adds deconstifying freeing procedures to the memory manager.  This allows us
    to have pointers as structure members that should be const * for all
    ordinary clients, and still be able to free the referenced objects without a
    compiler warning.  (gsmemory.h, gsmemory.c)

    Changes code, often to use the new deconstifying freeing procedures, to
    remove deconstifying casts.  (gspath.h, gxfunc.h, gsfunc.c, gsfunc0.c,
    gsfunc3.c, gspath.c, gsptype1.c)

    Changes the eprintf macros so they print the version as well as the program
    name.  (std.h, gscdef.c, gsmisc.c)

    Adds procedures that update cached values in graphics or imager states after
    setting device parameters.  Clients should use these when setting parameters
    of devices that may be current in graphics or imager states.  Note that this
    is only a partial solution for a much deeper problem, and may even have to
    be replaced at some point.  (gsdevice.h, gsdevice.c)

    Defines GS_CLIENT_COLOR_MAX_COMPONENTS (in gsccolor.h),
    GX_DEVICE_COLOR_MAX_COMPONENTS (in gxcindex.h), and GS_IMAGE_MAX_COMPONENTS,
    and starts to use them where needed, in anticipation of implementing DeviceN
    color spaces.  (gsccolor.h, gsdcolor.h, gsiparam.h, gsiparm4.h, gxcindex.h,
    gxctable.h, gximage.h, gxshade.h, gdevplnx.c, gscdevn.c, gscolor2.c,
    gxcht.c, gxclimag.c, gxcmap.c, gxicolor.c, gxctable.c, gxi12bit.c)

    Replaces small_exact_log2 by a procedure ilog2 that computes floor(log2(n)).
    (gxarith.h, gsmisc.c, gspaint.c, gxccman.c, gxclimag.c, gxclrect.c)

    Upgrades gsflip.c to handle >4 planes.  (gsbitops.h, gsflip.h, gsflip.c)

    Speeds up getting and testing memory device prototypes a little.  (gdevmem.c)

    Speeds up adding arcs to a path a little.  (gspath1.c)

    Increases the precision of a precomputed constant from float to double.
    (gxpath.h)

    Adds a new band list operation to make circles smaller and faster.
    (gxclpath.h, gxclpath.c, gxclrast.c)

    Adds an accessor procedure for the start point of the current subpath.
    (gxpath.h, gxpath2.c)

    Removes support for outside clipping, which we implemented only because we
    misinterpreted a requirement.  (gspath.h, gxcldev.h, gxcpath.h, gxpath.h,
    gspath.c, gxacpath.c, gxclip.c, gxclpath.c, gxclrast.c, gxcpath.c)

    Changes gs_copydevice to require that static prototypes either be registered
    in gx_device_list or have a correct stype pointer.  (This is already the
    case for all devices in code we distribute.)  (gsdevice.c)

    Adds ENUM_PTRS_PROC and RELOC_PTRS_PROC macros for giving a name to the
    typed pointer to the object being processed.  (gsstruct.h)

    Version 5.71 (tester) (3/3/99)

    This fileset reinstates support for TrueColor X displays, and adds optional
    support for GNU readline.  It also includes a little more work on the new
    driver text API.

    Incompatible changes

    (Library)
    	- The *line_accum* macros are now capitalized; declare_line_accum is
    renamed DECLARE_LINE_ACCUM_COPY, and DECLARE_LINE_ACCUM is new.

    Documentation

    Documents the CIE joint cache invariant more accurately.  (gscie.h)

    Adds a request for xdpyinfo/xwininfo output to the problem reporting form.
    (doc/Bug-form.htm)

    Procedures

    Fixes problems:
    	- The default search path was missing the lib subdirectory on many
    platforms.  (dvx-gcc.mak, os2.mak, ugcclib.mak, unix-gcc.mak, unixansi.mak,
    unixtrad.mak, watc.mak, watclib.mak, watcw32.mak)
    	- The dependency list for the X Windows drivers was incorrect,
    sometimes causing needed recompilation to be omitted.  (devs.mak)

    Utilities

    Fixes problems:
    	- The representation of maximum unsigned values produced warnings on
    some compilers (specifically, gcc with -Wtraditional).  (genarch.c)
    	- Some string variables weren't declared const.  (echogs.c,
    genarch.c)
    	- The viewpbm utility was broken for pgm and ppm (but not pbm).
    (bug introduced in 5.66) (lib/viewpbm.ps)

    Drivers

    Fixes problems:
    	- The X driver didn't handle TrueColor displays properly.
    (gdevxcmp.h, gdevxcmp.c)
    	- The alternative X drivers didn't implement get_bits properly.
    (gdevxalt.c)
    	- The X driver specified the byte order incorrectly for displays
    with more than 8 bits per pixel.  (gdevx.c)
    	- The X driver used the wrong number of bits for comparing colors on
    visuals with fixed color maps.  (gdevxcmp.h, gdevxcmp.c)
    	- Some symbols were multiply defined with -DNOPRIVATE.  (gdevbit.c)
    	- If a file specified a paper size, rather than using the default,
    the G3/G4 fax output drivers didn't adjust the width to a legal one for fax
    systems.  (gdevtfax.c)

    Segregates the resource lists, for which warnings about casting of const to
    non-const string types should be suppressed, into a separate file.
    (devs.mak, gdevx.h, gdevxini.c, gdevxres.c)

    Splits off the code related to color mapping for X Windows, for greater
    understandability.  (devs.mak, gdevx.h, gdevxcmp.h, gdevx.c, gdevxcmp.c,
    gdevxini.c)

    Changes code slightly to remove warnings about signed/unsigned integer
    constants.  (gdevxalt.c)

    Changes code to remove unused variables.  (gdevx.c, gdevxalt.c)

    Adds a user-contributed driver for the H-P LaserJet 4D.  (devs.mak,
    gdevdjet.c)

    Makes the bitcmyk driver reset its map_cmyk_color procedure dynamically
    according to the depth, allowing more efficient execution in the 1- and
    8-bit cases.  (gdevbit.c)

    Adds a settable option, AdjustWidth, to control whether the fax-format
    drivers (faxg*, tiffcrle, tiffg*) adjust the page width to legal fax values.
    Its default value is 1 (do adjust).  (devs.mak, gdevtfax.c)

    Adds a ForceMono parameter to the bitcmyk/bitrgb devices to implement a
    special monochrome-in-CMYK mode requested by a customer.  (gdevbit.c)

    Removes the TRIM_ and EXPAND_BITS_TO_BYTES options from the bit devices,
    since they are no longer needed.  (gdevbit.c)

    Fonts

    Changes the substitution mechanism for condensed / narrow fonts, so that the
    PDF interpreter can use it.  (lib/gs_fonts.ps)

    Interpreter

    Fixes problems:
    	- The bind operator generated unaligned accesses and might not
    operate reliably. (bug introduced in 5.70) (zmisc.c)
    	- If the BuildChar procedure of a font included an image or
    imagemask operator, charpath would (incorrectly) display the character.
    (zimage.c)

    Adds a bogus return statement to suppress a compiler warning.  (gs.c)

    Changes code slightly to remove warnings about signed/unsigned integer
    constants.  (store.h, ibnum.c)

    Changes the build date format to %d-%02d-%02d.  (lib/gs_init.ps, imainarg.c)

    Rearranges some code to add readline support.  (files.h, imain.c, zfileio.c,
    ziodev.c)

    Adds support for GNU readline, with several completion keys, contributed by
    a user.  (int.mak, gs_rdlin.ps, gp_gnrdl.c)

    Changes the font substitution machinery slightly so the PDF interpreter can
    use it.  (lib/gs_fonts.ps)

    Interpreter (PDF)

    Fixes problems:
    	- In-line images caused a syntaxerror or stackunderflow.
    (lib/pdf_draw.ps)
    	- The font substitution mechanism didn't detect Condensed fonts.
    (lib/pdf_font.ps)
    	- The font substitution mechanism didn't use the intelligent
    algorithm used for PostScript files.  (lib/pdf_font.ps)

    Prints a message when substituting for a font on the basis of its
    descriptor.  (lib/pdf_font.ps)

    Streams

    Adds an interface and default implementation for readline.  (srdline.h,
    stream.h, stream.c)

    Library

    Fixes problems:
    	- A void procedure attempted to return a value.  (stream.c)
    	- A pointer was declared with an extra *.  (gsmemory.c)
    	- An argument would be stringified with traditional C.  (gdevdbit.c)
    	- The check for validity of the CIE joint caches was wrong, leading
    to incorrect output in some obscure cases.  (gsciemap.c)
    	- A tiny rounding inaccuracy could cause an occasional blank line
    when rendering adjacent images.  (gxipixel.c)
    	- Some symbols were multiply defined with -DNOPRIVATE.  (gsptype2.h)
    	- If a character was too large to be cached, it didn't use
    anti-aliasing, even if TextAlphaBits was >1.  (gspaint.c)

    Changes code slightly to remove warnings about signed/unsigned integer
    constants.  (gsccode.h, gsmisc.c, gxcht.c)

    Changes code to remove a warning about an unhandled case in a switch.
    (gsstruct.h, gsmemory.c)

    Changes code to remove unused variables.  (gxcindex.h, gdevdbit.c,
    gdevprn.c, gxiscale.c)

    Restructures the header files for the new text API, adding the SINGLE
    options in text_params, enough new elements in text_enum to store all the
    arguments of text_begin, and new elements in text_enum to hold results
    returned by text_process.  This code is no longer "subject to [arbitrary]
    change without notice", although it is still not very stable.  (gstext.h,
    gxtext.h, gstext.c)

    Changes code to remove warnings about uninitialized variables.  (gxipixel.c)

    Changes the syntactic form of some constants yet again to suppress a
    different set of compiler warnings.  (gxsample.c)

    Adds a procedure to fix the charpath-in-BuildChar problem.  (gsimage.h,
    gsimage.c, gsptype1.c)

    Speeds up the handling of certain RasterOp cases for CMYK devices.
    (gxdevice.h, gxdevmem.h, gdevdrop.c, gdevmem.c, gdevmr8n.c, gdevrops.c)

    Adds a platform-specific interface for reading lines from stdin.  This is
    intended primarily to support GNU readline.  (lib.mak, gp.h, gp_strdl.c)

    Version 5.70 (internal) (2/20/99)

    This fileset includes substantial changes to the interpreter in support of
    making it fully reentrant (eliminating writable globals).

    Incompatible changes

    (Interpreter)
    	- The ref_stack structure has been renamed ref_stack_t, and has been
    changed substantially.  Clients should now access all of its members, other
    than the pointers to the current block, through the macros or procedures
    defined in istack.h.  The STACK_LOOP_{BEGIN,END} macros have been removed.
    	- The argument of context_state_load is no longer const.
    	- Each file's table of operator definitions is now limited to 16
    entries.  op_def_table[] no longer exists: use op_index_def() instead.
    	- invalid_file_entry now has an associated VM space,
    avm_invalid_file_entry, that must be used in constructing invalid file refs.
    	- restore will now undo binding of pseudo-operators.  Attempting to
    bind a local pseudo-operator into a global procedure will cause an
    invalidaccess error.

    Documentation

    Updates the driver documentation a bit.  It probably still includes a lot of
    out-of-date text.  (doc/Drivers.htm)

    Improves the problem reporting form to make it absolutely clear that test
    data are required, and that the problem must be reproducible without using a
    viewer.  (doc/Bug-form.htm)

    Documents the -dDOINTERPOLATE switch.  (doc/Use.htm)

    Documents the difference between public and tester releases, in connection
    with making tester releases available to everyone.  (doc/New-user.htm)

    Updates the list of history files.  (doc/Readme.htm)

    Adds a questionnaire for people who want to be notified of new test
    releases.  (doc/Readme.htm, doc/Tester.htm)

    Procedures

    Fixes problems:
    	- A ! was missing before an include.  (bcwin32.mak, msvc32.mak)
    	- A trailing \ in some macro definitions was quoted incorrectly.
    (bcwin32.mak, msvc32.mak)
    	- An editing error prevented a makefile from working.  (bcwin32.mak)
    	- The 16-bit spooler executable didn't reference its icon correctly.
    (gs16spl.rc)
    	- The Watcom makefiles had gotten badly out of date.  (watc.mak,
    watclib.mak, wccommon.mak)
    	- Some DEVICE_DEVS lines were too long for the shell to handle.
    (openvms.mmk)
    	- A space was missing before a colon.  (openvms.mmk)

    Updates MSVC support to handle version 6.  (msvc32.mak)

    Extends genconf to handle function types as well as image types, and changes
    the output for image types.  (genconf.c)

    Desupports the use of CONFIG for selecting between multiple configurations,
    since parameterized output directories do this better.  (bcwin32.mak,
    dvx-gcc.mak, gs.mak, int.mak, lib.mak, msvc32.mak, msvclib.mak, openvms.mak,
    openvms.mmk, os2.mak, ugcclib.mak, unix-gcc.mak, unixansi.mak, unixtrad.mak,
    watc.mak, watclib.mak, watcw32.mak)

    Adds a -dDOINTERPOLATE switch to force Interpolate in all images.
    (lib/gs_init.ps)

    Utilities

    Rewrites viewpcx to eliminate dependence on a special filter.
    (lib/viewpcx.ps)

    Drivers

    Fixes problems:
    	- The [e]pswrite and pdfwrite drivers wrote out clipping paths using
    the winding number rule even if the path had been set with eoclip.
    (gdevpdfd.c, gdevvec.c)
    	- Some occurrences of ushort should have been gx_color_value.
    (gdevpbm.c)
    	- A comment was accidentally left outside comment quotes.
    (gdev3852.c)
    	- There was a char/byte mismatch not covered by a cast.
    (gdevdcrd.c)
    	- There were still some references to the 'huge' keyword, which has
    been superseded by FAR.  (gdevwdib.c)
    	- Some obsolete references to which_colors hadn't been removed.
    (gdevwdib.c)
    	- The [e]pswrite driver produced incorrect output for a curveto or
    closepath followed by a lineto and then a moveto.  (gdevps.c)
    	- The [e]pswrite driver could produce incorrect output for paths
    ending with a lineto.  (gdevps.c)
    	- The name paper_sizes was used both by a driver and by other code,
    causing a problem when building with -dNOPRIVATE.  (gdevclj.c)

    Consolidates the X error handling statics into a structure.  (gdevxini.c)

    Updates the pdfwrite driver to reflect the addition of state to the
    ASCII85Encode filter.  (gdevpsdf.c)

    Adds a user-contributed driver for the Lexmark 5700 printer (black-and-white
    only).  (contrib.mak, gdevlxm.c)

    Updates the mswinpr2 driver with a new, user-contributed one that includes
    interaction with the user.  (gdevwpr2.c)

    Fonts

    Fixes problems:
    	- When TrueType support was present, the FONTPATH scanner didn't
    recognize TrueType fonts whose 'type' was "true" rather than the documented
    <00 01 00 00>.  (lib/gs_ttf.ps)
    	- When DEBUG was set, loading a TrueType font could cause an
    /undefined error.  (lib/gs_ttf.ps)

    Interpreter

    Fixes problems:
    	- Local (pseudo-)operators could get bound into global procedures
    with 'bind', causing dangling references.  Attempting this now causes an
    invalidaccess error.  Fixing this also required making restore undo binding
    of pseudo-operators.  (zmisc.c)
    	- A harmless dictfull error occurring during language level
    switching caused an error.  (zmisc2.c)
    	- If given a closed input file, flushfile caused an error, rather
    than doing nothing.  (zfileio.c)

    Renames the ref_stack structure as ref_stack_t, and factors it so that the
    parts set only at initialization are separated from the dynamic parts, in
    support of moving the stacks from static to dynamic storage.  (icstate.h,
    idebug.h, idstack.h, iestack.h, iostack.h, iparam.h, iparray.h, istack.h,
    idebug.c, interp.c, iparam.c, istack.c, zcontext.c, zpacked.c, zvmem.c)

    Moves the dynamic part of the stacks in-line in the context structure; gets
    rid of the statically allocated stacks.  (dstack.h, estack.h, icontext.h,
    icstate.h, idstack.h, iestack.h, interp.h, iostack.h, ostack.h, icontext.c,
    iinit.c, interp.c, zcontext.c)

    Packages the dictionary lookup statistics in a structure, like the other
    statistics.  (idict.c)

    Changes from dynamic to static initialization of the function type table.
    (int.mak, ifunc.h, iconf.c, zfunc.c, zfunc0.c, zfunc3.c)

    Removes the PCXDecode filter.  (zfilterx.c)

    Removes more writable statics.  (int.mak, btoken.h, files.h, icstate.h,
    igstate.h, ipacked.h, iscan.h, icontext.c, imain.c, iscan.c, iscanbin.c,
    zbseq.c, zcolor2.c, zcontext.c, zgstate.c, ziodev.c, zmath.c, zpcolor.c,
    zpacked.c)

    Changes the representation of the operator table to avoid allocating a
    dynamic copy.  This introduces a limit of 16 entries per definition set.
    (int.mak, opdef.h, iconf.c, idebug.c, iinit.c, interp.c, iutil.c,
    zcontext.c, zcontrol.c, zdict.c, zfileio.c, zgstate.c, ztype.c)

    Includes the ASCII85Decode filter in all configurations, for simplicity.
    (iscan.c, zfdecode.c)

    Makes the invalid file reference point to a static object.  (files.h,
    icontext.c, zfile.c, ziodev.c)

    Changes all dictfull error returns from the dictionary code to use
    return_error.  This should have been done a long time ago!  (idict.c)

    Increases the predefined size of systemdict a little more because .upp files
    may define a lot of new entries.  (iinit.c)

    Adds a few more interpreter statistics.  (interp.c)

    Interpreter (PDF)

    Fixes problems:
    	- Images never closed the data stream, placing a heavy load on the
    garbage collector to clean up streams and stream states.  (lib/pdf_draw.ps)
    	- Streams stored on external files didn't work.  (lib/pdf_base.ps)

    Reorganizes code slightly to allocate less memory for in-line images.
    (lib/pdf_draw.ps)

    Speeds up some common operations a little.  (lib/pdf_base.ps)

    Streams

    Removes the PCXDecode filter.  (spcxx.h [deleted], spcxd.c [deleted])

    Changes the name of a variable for greater clarity.  (stream.c)

    Splits off the ASCII85Decode filter into a separate file, since it turns out
    to be convenient to include it in all configurations.  (sa85d.h, sa85x.h,
    sa85d.c, sfilter2.c)

    Makes an initialization entry point available for non-heap-allocated
    streams.  (stream.h, stream.c)

    Changes the ASCII85Encode filter so it always produces lines of at most 80
    characters, not counting the EOD marker.  THIS IS A NON-BACKWARD-COMPATIBLE
    CHANGE, because this filter now needs a state structure, which it didn't
    before.  (sa85x.h, sfilter2.c)

    Library

    Fixes problems:
    	- Reference counting of graphics state elements was wrong when
    creating multiple contexts, causing memory corruption. (bug probably
    introduced in 5.68) (gsstate.c)
    	- If CIE joint caches were created because the reference count of
    the existing caches was >1, the new caches weren't initialized correctly.
    (bug introduced in 5.60, found by Ray Johnston.)  (gscie.c)
    	- If Margins are set so that part of the default clipping region
    lies outside the ((0,0),(width,height)) device coordinate space, the fast
    case of images could cause a memory access error.  (gxifast.c)
    	- In the case of a halftone with more bits than levels,
    gx_check_tile_cache could incorrectly return false, causing images to render
    more slowly than they should.  (gzht.h, gxht.c)
    	- There was a const mismatch between an argument and the formal
    parameter.  (gdevprn.h, gdevprn.c, gxclread.c)
    	- An error in the definition of st_imager_state_num_ptrs caused the
    garbage collector to omit marking one pointer in imager states, possibly
    causing memory corruption.  (gxistate.h)
    	- The bbox device, used with no target, didn't properly handle
    images where more data was provided than needed.  (gdevbbox.c)

    Removes any pretense of supporting multiple threads in a single-threaded
    environment.  Dummy synchronization primitives, however, are still provided.
    (gp_nsync.c)

    Removes more writable statics.  (gximage.h, gxi12bit.c, gxino12b.c,
    gxipixel.c)

    Changes the handling of image types, and adds similar handling for function
    types.  (gscdefs.h, gconf.c)

    Consolidates the gs_std* files into a structure.  (gsio.h, gsmisc.c)

    Speeds up the fastest (common) case of clipping fill_rectangle and copy_mono
    operations.  We could do the same for the other operations if we wanted.
    (gxclip.c)

    Identifies this fileset as a tester release.  (gscdef.c)

    Version 5.69 (internal) (2/4/99)

    This incremental fileset fixes minor compilation problems, as well as many
    problems with driver-based CRDs (not used by PostScript or PDF).

    Procedures

    Fixes problems:
    	- The OpenVMS makefile had not been updated properly to reflect the
    division of files into subdirectories.  (openvms.mak)
    	- A space was missing before a :.  (devs.mak)
    	- The MMK makefile had not been updated to reflect the renaming of
    the psm[raw] devices to pksm[raw].  (openvms.mmk)

    Changes the default name of the build directory for the library test program
    from debugobj to libobj, so that one can work with both library and
    interpreter builds without interference.  (ugcclib.mak)

    Adds -fno-builtin to the gcc switches, to detect failure to declare
    functions like memcpy, at a small cost in performance.  (ugcclib.mak,
    unix-gcc.mak)

    Utilities

    Makes a couple of minor fixes to ansi2knr, suggested by users.  (ansi2knr.c)

    Updates ps2ai.ps with an improved version from its author.  (lib/ps2ai.ps)

    Drivers

    Fixes problems:
    	- The 32-bit CMYK "async" BMP driver was declared incorrectly as a
    non-async device.  (gdevbmpa.c)
    	- Some #includes were missing, because gcc didn't warn about
    failures to declare certain standard functions.  (x_.h, gdevdcrd.c, gdevx.c)
    	- The PC frame buffer device still referred to _ss and near.
    (gdevpcfb.c)
    	- The [e]pswrite driver didn't handle bitmaps with a non-zero X bit
    offset correctly.  (gdevps.c)
    	- The pdfwrite driver wrote all clipping paths with the winding
    number rule, even if they were established by eoclip.  (gdevpdfd.c)
    	- "Vector" drivers wrote all clipping paths with the winding number
    rule, even if they were established by eoclip.  (gdevvec.c)

    Adds the CRDName parameter to the sample driver-based CRD.  (gdevdcrd.c)

    Tweaks the sample driver-based CRD to make it a more realistic (closer to
    the PostScript default).  (gdevdcrd.c)

    Adds the sample driver-based CRD to the modified X drivers.  (devs.mak,
    gdevxalt.c)

    Interpreter

    Fixes problems:
    	- Some #includes were missing, because gcc didn't warn about
    failures to declare certain standard functions.  (zchar1.c)
    	- Driver CRDs were not supported properly.  (zcrd.c, lib/gs_lev2.ps)

    Changes some code because non-int switch expressions are not handled
    correctly in pre-ANSI C.  (igcref.c, zdevice.c)

    Adds the ability to set the orientation of zero-length "dots".  (zgstate.c)

    Adds comments on an alternative shallow-binding design.  (dstack.h)

    Changes the threshold for repeatedly rescanning change lists so that it is
    based on the cumulative amount of rescanning and not the amount in a single
    pass.  (isave.c)

    Streams

    Changes some code because non-int switch expressions are not handled
    correctly in pre-ANSI C.  (sfilter1.c)

    Library

    Fixes problems:
    	- Some casts to (gx_device *) were missing.  (gschar.c)
    	- Some #includes were missing, because gcc doesn't warn about
    failures to declare certain standard functions.  (gdevdgbr.c, gscie.c,
    gsmatrix.c, gxshade1.c)
    	- gxclread.c now needs gdevprn.h to declare certain procedures.  We
    tried very hard to make the command list machinery not depend on anything
    related to printer devices, but at this point we have not succeeded.
    (gxclread.c)
    	- For CRDs set by library clients, the is_identity flags in the
    caches were set incorrectly, producing incorrect output.  (gscie.h, gscie.c,
    gscrd.c, gscrdp.c)
    	- For CRDs set by library clients, the EncodeABC and RenderTable T
    procedures were sampled incorrectly.  (gsciemap.c, gscrd.c)
    	- The interpreter tried to sample the TransformPQR functions in the
    PostScript CRD even for driver CRDs.  (gscie.h, gscie.c)
    	- Library assistance was needed for the interpreter to support
    driver CRDs properly.  (gscrdp.h, gscrdp.c)
    	- The procedures that accessed cached CIE values didn't round the
    index, so accessing already-cached values could wipe out the cache.
    (gscie.c)
    	- The procedure that accessed cached RenderTable.T values simply
    wasn't implemented.  (gscrd.c)

    Adds an "if (1)" to a macro to suppress "statement not reached" warnings
    from stupid compilers.  (gsmemlok.c)

    Changes the syntactic form of some constant tables to suppress
    signed/unsigned warning messages.  (gsbitops.c, gxsample.c)

    Changes some switch statements to if/else because non-int switch expressions
    are not handled correctly in pre-ANSI C.  (gdevmr8n.c, gxdcolor.c)

    Adds the ability to set the orientation of zero-length "dots".  (gsline.h,
    gxline.h, gsline.c, gsstate.c, gxstroke.c)

    Adds an allocator state variable to support the change in the rescanning
    algorithm.  (gxalloc.h)

    Version 5.68 (internal) (1/29/99)

    This fileset implements PatternType 2 (gradient fill) Patterns.  All
    significant PostScript LanguageLevel 3 features are now implemented, except
    for DeviceN color spaces.  We have also verified that the MMK script for
    OpenVMS also works with MMS.

    Note that there are significant non-backward compatible changes to memory
    management for device instances: we are sorry about this, but just as with
    paths in 5.22, we had to fix this design problem at some point.

    Incompatible changes

    (Procedures)
    	- A new makefile, unix-aux.mak, must be included in all Unix
    top-level makefiles.  (It is included in the ones we distribute.)
    unixtail.mak is renamed unixlink.mak.

    (Library)
    	- The names of the anti-aliasing parameters in the device color_info
    structure have been changed.
    	- Dummy definitions for PC-specific C keywords (_cs, _ds, _ss, near,
    far, huge) are no longer provided: these keywords should be removed from
    non-PC-specific code.
    	- The names of the alignment_mod, ptr_le, ptr_lt, ptr_ge, ptr_gt,
    and ptr_between macros have been changed to upper case (ALIGNMENT_MOD etc.)
    	- gs_make_null_device now takes an additional argument.
    	- The ccolor member of a gx_device_color is no longer inside a
    substructure.
    	- Clients now must initialize Pattern templates with
    gs_patternN_init, where N is the PatternType (normally 1), before filling in
    the members.
    	- gs_pattern_instance_common_t is renamed gs_pattern_instance_t;
    gs_pattern_instance is renamed gs_pattern1_instance.
    	- To set the target of a forwarding device, you must now use
    gx_device_set_target rather than setting the target member directly.
    	- Memory management for devices has changed substantially, and in a
    subtle way.  If you have code that calls the library, please read the
    documentation in gxdevcli.h.
    	- Callers of the driver create_buf_device procedure must always call
    it through gdev_create_buf_device, never directly.
    	- For composite and CID-keyed fonts, the character code returned by
    gs_show_current_char and gs_kshow_previous_char is now the full multi-byte
    character code rather than just the last byte of the code.
    	- gdev_cmap_set_method has been replaced by a device parameter,
    ColorMappingMethod.
    	- The CRD pointer parameter for param_write_cie_render1 and
    param_put_cie_render1 is no longer const.

    Documentation

    Fixes problems:
    	- The documentation for resize_object and resize_string didn't allow
    the new size to be the same as the old size, didn't describe what data was
    preserved, and didn't guarantee to return the same object if the new size
    was the same as the old size.  (gsmemraw.h, gsmemory.h)
    	- The documentation for the value returned by the internal
    .getmetrics32 operator was incorrect.  (zchar32.c)
    	- The documentation for the special color mapping device didn't say
    that the caller had to call gs_setdevice_no_init to update graphics states.
    (gdevcmap.h)

    Notes that OPENVMS.MMK works with both MMK and MMS.  (doc/Make.htm)

    Adds a note to the C style guide about nested vs. multi-branch 'if'
    statements.  (doc/C-style.htm)

    Notes that the multi-threaded ("async") drivers require libc version 6 or
    higher under Linux.  (doc/Make.htm)

    Notes additional Irix/MIPSpro combinations that compile idict.c incorrectly,
    and gives a workaround.  (doc/Make.htm)

    Adds a couple more acknowledgements.  (doc/Helpers.htm)

    Documents the new -Z^ switch.  (doc/Use.htm)

    Documents the new rules about memory management for device instances
    (gxdevcli.h, gxdevice.h)

    Procedures

    Fixes problems:
    	- The "async" BMP devices were accidentally included in the default
    list for Unix, leading to a requirement for the POSIX thread package, which
    is not available on all systems.  (unix-gcc.mak)
    	- There was a minor typo in the new MMK script.  (openvms.mmk)
    	- The MMK script redefines macros, which MMS does not allow.
    (openvms.mmk)
    	- The gcc version test used gcc rather than $(CC) for the compiler
    name.  (unix-gcc.mak)
    	- There was a minor typo in the pcx2up device makefile entry.
    (devs.mak)
    	- Some commands in the Unix install rules referenced sh rather than
    $(SHELL).  (unixinst.mak)

    Makes (dummy) in-RIP trapping an optional feature, and removes it from the
    default configuration.  (int.mak, lib.mak)

    Splits off the build rules for the Unix auxiliary programs, so they can be
    shared between interpreter and library configurations.  (ugcclib.mak,
    unix-aux.mak, unix-gcc.mak, unixansi.mak, unixtail.mak [deleted],
    unixlink.mak, unixtrad.mak)

    Adds the bitcmyk device to the list of devices for the library test program.
    (ugcclib.mak)

    Utilities

    Fixes problems:
    	- ansi2knr didn't handle occurrences of '/' or quoted strings inside
    an argument list correctly.  (ansi2knr.c)

    At the suggestion of a GNU person, makes ansi2knr check for output errors.
    (ansi2knr.c)

    Drivers

    Fixes problems:
    	- Setting the resolution on the SPARCprinter didn't work.
    (gdevsppr.c)
    	- Even in PDF 1.1 compatibility mode, the PDF writer used a
    predictor to compress images.  (gdevpsdi.c)
    	- Reference counting for devices was not implemented consistently.
    (gdevxalt.c)
    	- gcc (again) missed some static / non-static inconsistencies.
    (gdevbmpa.c, gdevifno.c)

    Removes all remaining uses of segment identifiers (_cs, _ds, _ss) from
    non-PC-specific code.  (gdev3852.c, gdevcdj.c, gdevhl7x.c, gdevl256.c,
    gdevmgr.c, gdevsgi.c, gdevsppr.c, gdevvglb.c)

    Removes all remaining uses of the 'near' keyword from non-PC-specific code.
    (gdevcd8.c, gdevcdj.c, gdevcgm.c)

    Changes uses of round_up to ROUND_UP.  (gdevmsxf.c, gdevpcx.c, gdevpx.c,
    gdevxxf.c)

    Adds user-contributed support for 16-bit displays to the MS Windows driver.
    (gdevmswn.c, gdevwdib.c)

    Adds a user-contributed driver (sunhmono) for the Harlequin variant of 1-bit
    Sun raster files.  We expect to add other varieties of Sun Raster file
    eventually as well.  (contrib.mak, gdevsunr.c)

    Adds a user-contributed driver (fs600) for the Kyocera FS-600 laser printer.
    (devs.mak, gdevdjet.c)

    Replaces the sample device CRD with a slightly hacked version of the default
    PostScript CRD, and moves it to a separate file for greater flexibility in
    testing.  (gdevdcrd.h, gdevbit.c, gdevdcrd.c)

    Adds standard and "async" 32-bit CMYK BMP drivers (even though this is
    outside the published BMP format).  (gdevbmp.c, gdevbmpa.c)

    Changes the names of the separated-CMYK PBM drivers from psm to pksm, to be
    more descriptive.  (devs.mak, openvms.mak, unix-gcc.mak, gdevpbm.c)

    Platforms

    Fixes problems:
    	- On MS Windows and OS/2, "(%stdin) (r) file bytesavailable" caused
    a crash.  (gp_msio.c, gp_os2.c)

    Fonts

    Fixes problems:
    	- TrueType fonts with fewer glyph names in post than entries in loca
    caused an error.  (gs_ttf.ps)

    Adds additional tracing to the TrueType font loader.  (lib/gs_ttf.ps)

    Per Adobe, adds the Euro symbol under the name /Euro (capitalized) to
    various built-in Encodings.  (lib/gs_mro_e.ps, lib/gs_pdf_e.ps,
    lib/gs_sym_e.ps, lib/gs_wan_e.ps)

    Interpreter

    Fixes problems:
    	- An extraneous file got left in the fileset.  (lib/pdf_main.ps.sav
    [deleted])
    	- The number of required arguments for .pathbbox was incorrectly
    specified as 0 rather than 1.  (zpath1.c)
    	- Opening a ReusableStreamDecode filter with a string source and no
    decoding filters left an extra value on the stack.  (lib/gs_ll3.ps)
    	- Type 32 fonts sometimes didn't display the characters, or
    displayed them offset.  (lib/gs_typ32.ps)
    	- In LanguageLevel 3, copypage still called EndPage with 1 rather
    than 0.  (lib/gs_init.ps)
    	- The HalftoneName parameter was missing from the trapping parameter
    set.  (lib/gs_ll3.ps)
    	- CMap character entries were processed in the wrong order.
    (lib/gs_cmap.ps)
    	- CMap'ed non-CID fonts didn't work properly, because they called
    BuildChar with the original character code rather than BuildGlyph with the
    mapped glyph.  (zchar.c)
    	- Using an out-of-range CID value with a CIDFont caused an error
    rather than substituting a notdef.  (lib/gs_cidfn.ps)
    	- CIDFontType 0 fonts with a GlyphDirectory didn't fall back to the
    indexed character data if the CID wasn't in the GlyphDirectory.
    (lib/gs_cidfn.ps)
    	- CIDFontType 0 fonts didn't substitute a notdef at all.
    (lib/gs_cidfn.ps)

    Changes uses of round_up to ROUND_UP.  (igcstr.c)

    Updates clients for the object-oriented changes to Patterns.  (zcolor2.c,
    zpcolor.c)

    Implements the rest of PatternType 2.  (ipcolor.h, zpcolor.c, zshade.c)

    Makes in-RIP trapping an optional feature.  (lib/gs_ll3.ps, lib/gs_trap.ps)

    Updates clients for the change in gs_show_current_char.  (zcfont.c, zchar.c)

    Changes the dict_*_param macros to procedures, for easier tracing.  This
    includes a change in the return value of dict_matrix3_param.  (icie.h,
    zcie.c, zcrd.c)

    Streams

    Changes uses of round_up to ROUND_UP.  (scfd.c, scfe.c)

    Library

    Fixes problems:
    	- Once again, gcc failed to flag a static procedure declaration
    followed by a non-static definition.  (gdevprna.c, gximage3.c)
    	- Anti-aliasing no longer worked for the x11alpha device.  To fix
    this, we factored out the anti-aliasing information in the
    gx_device_color_info structure.  (bug introduced in 5.65) (gxdevcli.h,
    gdevabuf.c, gdevdflt.c, gdevxalt.c, gsdparam.c)
    	- An empty declaration generated an extraneous semicolon.
    (gxclip2.h)
    	- Some macros that generated an if-else construct didn't enclose it
    in BEGIN/END, possibly leading to incorrect parsing.  (gxobj.h)
    	- A comment was missing a closing */.  (gxpageq.h)
    	- The handling of the phase in Pattern filling was broken again.  We
    probably broke it with the "fix" introduced in 5.24.  (gxp1fill.c)
    	- Looking up an undefined IODevice name caused a memory access
    error.  (bug claimed to be fixed in 5.24) (gsiodev.c)
    	- The null device installed for stringwidth didn't copy the color
    mapping information from its target, causing confusion if the current device
    was a pattern accumulator.  (gxdevcli.h, gxdevice.h, gschar.c, gsdevice.c,
    gxpcmap.c)
    	- mem_mapped2_copy_mono produced incorrect results for byte-aligned
    rectangles exactly 1 byte wide (fix from John D.), and could also access
    data 1 byte beyond the end of each source row.  (gdevm2.c)
    	- In the case of a masked image or a RasterOp involving a Pattern,
    the garbage collector could fail to follow a pointer, possibly causing
    memory corruption.  (gsdcolor.h)
    	- Assigning a double value to a float variable caused an infinite
    recursion.  (gxshade1.c)
    	- Failure to detect when the region being filled had become very
    small caused excessive recursion.  (gxshade4.c)
    	- The default implementations of resize_object didn't always return
    the old object if the old and new sizes were the same.  (gsalloc.c,
    gsmalloc.c)
    	- The left side bearing of TrueType characters was sometimes
    calculated incorrectly.  (gstype42.c)
    	- The TrueType renderer disregarded the left side bearing values.
    We aren't sure that the change we made is right, but it seems to produce
    better output.  (gstype42.c)
    	- Shadings used the first Decode entry for both X and Y values.
    (gxshade.c)
    	- Function-based Shadings sometimes omitted part of their output.
    (gxshade1.c)
    	- Function-based Shadings didn't access 4-bit-per-sample data
    correctly.  (gsfunc0.c)
    	- The malloc/free-based allocator didn't finalize objects when
    freeing them.  (gsmalloc.c)
    	- Reference counting for device instances was not implemented even
    close to consistently.  THIS IS THE BUG TAIL WE WORRIED ABOUT IN 5.24.
    (gxdevcli.h, gxdevice.h, gdevbbox.c, gdevcmap.c, gdevmem.c, gdevnfwd.c,
    gdevplnx.c, gdevprn.c, gdevrops.c, gsalphac.c, gschar.c, gsdevice.c,
    gsropc.c, gxidata.c, gxmclip.c, gxipixel.c, gxpcmap.c)
    	- Some device structure definitions failed to include finalization.
    (gdevmrop.h, gsstruct.h, gxclip2.h, gxcpath.h, gxdevmem.h, gxmclip.h)
    	- Reference counting for the device halftone wasn't correct in the
    band rasterizer.  This must be a recently introduced bug, because otherwise
    banding couldn't have worked.  (gxclrast.c)
    	- When banding, high-level images that extended off the page in the
    Y direction caused memory access errors.  (gxclimag.c)
    	- [a]widthshow didn't use the correct value for comparison for
    composite fonts with FMapType 9 (CMap).  (gxchar.h, gschar.c, gschar0.c,
    gsfcmap.c)
    	- The special color mapping device only worked for
    device_cmap_monochrome.  (gdevcmap.h, gdevcmap.c)
    	- The definition of gs_memory_locked_release was wrong.
    (gsmemlok.h, gsmemlok.c)
    	- An opaque structure definition (for gx_device) was missing,
    creating a need for an otherwise unnecessary #include. (gscrdp.h)
    	- Certain cached values weren't computed when needed.  Fixing this
    required removing 'const' from a parameter type.  (gscrdp.h, gscrdp.c)
    	- gxclmem.c #included "gsmalloc.h", which is no longer needed.
    (gxclmem.c)
    	- Memory management for device halftones was incorrect, leading to
    objects being freed twice or other memory corruption during band rendering.
    (gzht.h, gsht.c, gsstate.c, gxclrast.c, gxistate.c)
    	- Setting a driver-originated CRD didn't invalidate cached
    information, leading to incorrect output.  (gscrdp.c)
    	- A consistency check on driver-originated CRDs was incorrect,
    causing valid CRDs to be rejected.  (gscrdp.c)

    Removes dummy definitions for old PC-specific language extensions.
    (stdpre.h)

    Removes uses of the PC-specific 'huge' keyword.  (gdevmem.c)

    Removes uses of the PC-specific 'near' keyword.  (gdevabuf.c, gdevbbox.c)

    Changes the pointer comparison macros to upper-case names.  (gxalloc.h,
    stdpre.h, gsalloc.c, gsmisc.c)

    Changes the alignment_mod macro to upper case.  (stdpre.h, gdevdbit.c,
    gdevdgbr.c, gsparams.c, gxifast.c)

    Changes the round_up and round_down macros to upper case.  We retain the
    lower-case definitions for the sake of the PCL code.  (gxfcache.h, gxobj.h,
    stdpre.h, gdevalph.c, gdevmem.c, gsalloc.c, gspath1.c, gxccman.c,
    gxclimag.c, gxifast.c)

    Makes Pattern colors more object-oriented, to support PatternType 2,
    splitting gsptype1.c off from gspcolor.c in the process.  (gsccolor.h,
    gsdcolor.h, gspcolor.h, gsptype1.h, gsptype2.h, gxcolor2.h, gxpcolor.h,
    gspcolor.c, gsptype1.c, gxpcmap.c)

    Implements PatternType 2.  (gspcolor.h, gsptype1.h, gsptype2.h, gxcolor2.h,
    gxpcolor.h, gxshade.h, gspcolor.c, gsptype2.c)

    Changes the interface to shaded filling to make filling rectangles more
    efficient.  (gsshade.h, gscolor3.c, gsshade.c)

    Improves some macros that didn't handle expressions as arguments.
    (gsrect.h)

    Improves tracing of loading the CIE caches.  (gscie.c)

    Cleans up some formatting, and replaces some floating point divides with
    multiplies.  (gstype42.c)

    Adds default values for the MaxSeparations (1), Separations (false), and
    SeparationColorNames (empty array) device parameters.  (gsdparam.c)

    Adds -Z^ to trace reference counting.  (gsrefct.h, gsmemory.c)

    Changes the definition of finalization so that finalization procedures *can*
    assume that objects they reference still exist.  This is necessary so that
    forwarding devices can decrement the reference counts of their targets.
    Fortunately, all invocations of finalization (in 'restore', the garbage
    collector, and freeing) already have this property.  (gsstruct.h)

    Extends CRD initialization so that cached values may be copied from an
    existing CRD.  (gscrd.h, gscrd.c)

    Adds a wrapper to the driver create_buf_device procedure to increment the
    reference count, so that buffer devices can be freely used in graphics
    states and as a target.  (gxdevcli.h, gdevprn.c, gxclread.c)

    Removes recursion from the shading rendering code, in preparation for making
    it interruptible (required for DeviceN color mapping callouts).
    (gxshade4.h, gxshade1.c, gxshade4.c, gxshade6.c)

    Monitor-locks the default allocator based on the C heap, if multi-threading
    is being supported at all.  (lib.mak, gsmalloc.h, gsmalloc.c)

    Speeds up the implementation of mem_true32_copy_mono for the common case.
    (gdevm32.c)

    Adds a (disabled) option for defining gx_color_index as a pointer or a
    structure, for testing.  (gxcindex.h)

    Makes the library test program test the special color mapper more
    thoroughly.  (gslib.c)

    Version 5.67 (internal) (1/8/99)

    This fileset adds more PostScript LanguageLevel 3 capability:
    	- Complete implementation of shfill.
    	- Most of the expanded CMap capabilities.
    	- ReusableStreamDecode filter.
    	- FontType 2 for CFFs (formerly done in an incompatible way).
    	- HalftoneMode user parameter.
    	- HalftoneTypes 6, 10, and 16.
    	- ImageType 3 images.
    	- UseCIEColor device parameter.
    It also adds a build script for MMK (which may also work with MMS) under
    OpenVMS, and Uli Wortmann's drivers for the H-P color inkjet printers.
    Among other bug fixes, it eliminates about half the "possibly uninitialized
    variable" compiler warnings.

    Incompatible changes

    (Library)
    	- The default UCR and BG functions are now f(k) = k rather than f(k)
    = 0.
    	- The set_[d]fmul2fixed_vars macros have been removed from
    gxfixed.h.  Clients must use the new CHECK/FINISH_[D]FMUL2FIXED_VARS macros.
    (We don't think there are any such clients outside Ghostscript itself.)
    	- The internal procedure gx_cpath_intersect_slow is replaced with
    gx_cpath_intersect_path_slow, with different arguments.
    	- gs_color_space_type_Device{Gray,RGB,CMYK} are now private.
    Clients should use the gs_cspace_Device{Gray,RGB,CMYK} access procedures in
    gscspace.h to obtain device color space objects.
    	- FontType 2 was renamed from ft_CFF to ft_encrypted2.
    	- FontType 2 fonts now have FontType = ft_encrypted2, rather than
    ft_encrypted with CharstringType = 2.  CharstringType no longer exists.
    	- Type 1 / Type 2 fonts now have an additional member, interpret,
    that must be initialized.
    	- gdev_prn_render_lines and gdev_prn_get_band_buffer replace
    gdev_prn_locate_overlay_buffer and gdev_prn_get_overlay_bits.  "Async"
    drivers must now use the new procedures to implement partial-page rendering
    recovery.
    	- Clients that pass ImageType 3 images where the mask and the image
    are not scaled identically, or that call image_plane_data without knowing
    the image type, must now call gs_image_planes_wanted or
    gx_image_planes_wanted in order to find out which subset of the data planes
    to pass to the next call of image_plane_data.
    	- gx_image_enum_common_init now takes slightly different arguments.
    	- gs_imager_state_initialize now initializes the entire imager
    state, including halftone, dev_ht, and ht_cache.
    	- The argument lists for the plane_data and end_image procedures in
    image enumerators have changed.

    Documentation

    Fixes problems:
    	- The 5.66 News mentioned the non-existent WAITFILE macro, and had
    another minor typo.  (doc/News.htm)
    	- The URL for the user-contributed H-P 850c driver was incorrect.
    (doc/Devices.htm, contrib.mak)
    	- The documentation for the driver image API had gotten out of date.
    (doc/Drivers.htm)

    Greatly improves documentation for the page queue.  (from Artifex 5.50c)
    (gxpageq.h)

    Documents the fact that Solaris builds now need -lposix4 for <semaphore.h>.
    (doc/Make.htm)

    Adds a stack status comment in .pdfshow.  (lib/gs_pdfwr.ps)

    Documents the new -Z` debugging switch.  (doc/Use.htm)

    Touches up some formatting in the C style guide, and adds a mention of the
    space-before-: rule for makefiles.  (doc/C-style.htm)

    Adds documentation for the new H-P 8xx drivers.  (doc/Devices.htm)

    Splits off news for versions 5.0 - 5.50 into a separate file.
    (doc/History5.htm)

    Procedures

    Fixes problems:
    	- On MS Windows platforms, the DLL object file wasn't created in the
    proper directory.  (from Artifex 5.55) (msvc32.mak)
    	- cfonts.mak didn't have no-op commands for rules that didn't
    contain any commands.  (cfonts.mak)
    	- The version number for libpng was different from libpng's own
    version numbering system.  (libpng.mak)
    	- Solaris builds now need -lposix4 for <semaphore.h>.
    (unix-gcc.mak, unixansi.mak, unixtrad.mak)
    	- The makefiles redefined a number of macros, which MMS doesn't
    allow.  (bcwin32.mak, gs.mak, int.mak, lib.mak, libpng.mak, msvc32.mak,
    openvms.mak, openvms.mmk, unix-gcc.mak, unixansi.mak, unixtrad.mak,
    version.mak)

    Changes cp.bat and rm.bat to eliminate "File not found" messages.  (from
    Artifex 5.55) (cp.bat, rm.bat)

    Changes all platform-independent makefiles to add a space before the : that
    separates the targets from the dependencies, to allow the makefiles to be
    used with MMS/MMK.  (cfonts.mak, contrib.mak, devs.mak, gs.mak, int.mak,
    jpeg.mak, lib.mak, libpng.mak, zlib.mak)

    Adds a script for compiling Ghostscript on OpenVMS systems with MMK.  This
    has not been tested extensively.  (doc/Make.htm, openvms.mmk)

    Changes the set of optimization switches for MSVC++.  We believe the new
    switches produce working executables, which /O2 didn't.  (msvc32.mak,
    msvccmd.mak)

    Updates the default expected libpng version to 1.0.2.  (bcwin32.mak,
    dvx-gcc.mak, msvc32.mak, msvclib.mak, openvms.mak, os2.mak, ugcclib.mak,
    unix-gcc.mak, unixansi.mak, unixtrad.mak, watc.mak, watclib.mak,
    watcw32.mak)

    Utilities

    Fixes problems:
    	- Default scaling in viewcmyk.ps was broken.  (lib/viewcmyk.ps)

    Updates pdf2dsc.ps with a newer (user-contributed) version that generates
    DocumentMedia and PageMedia comments.  (lib/pdf2dsc.ps)

    Drivers

    Fixes problems:
    	- An int * was provided where a uint * was required.  (gdevpbm.c)
    	- ps2ps -dLanguageLevel=1 generated invalid output.  (gdevps.c)
    	- The X drivers crashed on gray-scale displays.  (bug probably
    introduced in 5.61)  (gdevx.c)
    	- The width and height of the cljet5 device were interchanged.
    (from Artifex) (gdevclj.c)
    	- The PDF writer didn't clip cached characters properly.  (bug
    introduced somewhere between 3.51 and 5.10) (gdevpdfi.c)
    	- For stroked paths with a non-uniform CTM, the PDF writer could
    emit coordinates larger than 32K, which Acrobat handles incorrectly.
    (gdevpdfd.c)

    Restructures some code to suppress bogus "possibly uninitialized variable"
    warnings.  (gdevpdfm.c, gdevps.c)

    Adds some unnecessary initializations to suppress bogus "possibly
    uninitialized variable" warnings.  (gdevpbm.c, gdevpdfd.c, gdevvec.c,
    gdevxalt.c)

    Rewrites the (contributed) X11 xfont code to remove code duplication.
    (gdevx.h, gdevx.c, gdevxini.c, gdevxxf.c)

    Adds a user-contributed driver for the H-P LaserJet 3100 with H-P software.
    (gdevmeds.h, gdevl31s.c, gdevmeds.c)

    Adds a user-contributed option for 600 dpi output on H-P DesignJet
    650C-compatible printers.  (gdevcdj.c)

    Removes unnecessary references to device color spaces.  (gdevpdfi.c)

    Changes the [e]pswrite and pdfwrite drivers to use EndOfBlock rather than
    Rows for CCITTFax image encoding, producing slightly smaller output.
    (gdevpsdf.c)

    Changes the sample async driver to use gdev_prn_render_lines and
    gdev_prn_get_band_buffer instead of locate_overlay_buffer and
    get_overlay_bits.  Unfortunately, because "async" memory management is
    broken, we have no way to test the code.  (gdevbmpa.c)

    Updates clients for the change in gx_image_enum_common_init.  (gdevpdfi.c,
    gdevvec.c)

    Adds Uli Wortmann's drivers for the H-P color inkjet printers.
    (contrib.mak, gdevcd8.c)

    Adds mode 9 compression to the PCL printer utilities.  (gdevpcl.h,
    gdevcdj.c, gdevpcl.c)

    Updates implementors for the change in the plane_data and image_end image
    processing procedures.  (gdevpdfi.c, gdevps.c, gdevpx.c)

    Fonts

    Fixes problems:
    	- The PFM files for URW Grotesk and Antiqua had some extraneous ^M
    characters inserted before ^J characters.  (fonts/u003043t.pfm,
    fonts/u004006t.pfm)
    	- CID-keyed fonts didn't handle GlyphDirectory correctly.
    (lib/gs_cidfn.ps)
    	- CIDFontType 0 fonts with 0-length Subrs caused an error.
    (lib/gs_cidfn.ps)
    	- Malformed TrueType fonts with overlapping tables (which are
    nevertheless apparently acceptable to Windows) caused an error.
    (lib/gs_ttf.ps)
    	- The Hershey font repairs documented in fileset 5.24 apparently
    never happened: the makeher.ps program was fixed, but the derived fonts were
    still broken.  (fonts/h*.ps)
    	- In some Fontmaps, the /Charter-* font names were linked directly
    to the Bitstream fonts, rather than being aliases for /CharterBT-*.
    (lib/Fontmap.GS, lib/Fontmap.Sol, lib/Fontmap.Ult)

    Makes undefined fonts execute the SubstituteFont procedure in $error, per a
    posting by Stephen Zisk of Adobe on pdf-prepress-l on 10/8/97.
    (lib/gs_fonts.ps)

    Changes the interpreter-level CIE color space install procedures to reflect
    the addition of const to the color space argument. (zcie.c)

    Interpreter

    Fixes problems:
    	- The interpreter appeared to be a distiller even when the current
    device was not pdfwrite.  We fixed this by patching 'where' to make the
    distiller operators visible iff the current device is pdfwrite.  We also
    moved the setcolor hack in 'where' into PostScript code.  (lib/gs_init.ps,
    lib/gs_lev2.ps, lib/gs_pdfwr.ps, zmisc2.c)
    	- The current color space for shfill wasn't identically the same
    color space as the one in the shading.  (gs_ll3.ps)

    Changes the default UCR and BG functions from f(k) = 0 to f(k) = k.
    (lib/gs_init.ps)

    Adds some unnecessary initializations to suppress bogus "possibly
    uninitialized variable" warnings.  (igc.c, zcie.c)

    Restructures some code slightly to suppress a bogus "possibly uninitialized
    variable" warning.  (zdevice.c)

    Brings the CMap machinery up to LL3, by allowing a single CMap to reference
    multiple fonts (usefont, usematrix, and array CIDSystemInfo).
    (lib/gs_cmap.ps, zfcmap.c)

    Finishes implementing ReusableStreamDecode.  The implementation is very
    inefficient -- it reads the entire contents into a string -- but it passes
    the Genoa FTS.  (lib/gs_ll3.ps, lib/gs_res.ps, zfreuse.c)

    Changes CFFs with CharstringType = 2 to generate FontType 2 fonts, rather
    than FontType 1 with CharstringType = 2, for compatibility with Adobe's LL3
    implementations.  (lib/gs_cff.ps, lib/gs_type1.ps, lib/type1ops.ps, bfont.h,
    ichar1.h, ifont.h, ifont1.h, zbfont.c, zchar1.c, zchar2.c, zcharx.c,
    zfont.c, zfont1.c, zfont2.c)

    Adds the ability to create (with .bytestring) and do a few operations
    (currently only length, put, putinterval) on byte arrays.  This is needed
    for implementing ReusableStringDecode filters with >64K bytes of data, and
    for the LL3 halftone types.  (zgeneric.c, zstring.c)

    Implements HalftoneMode, and HalftoneTypes 6, 10, and 16.  To do this, we
    introduce an internal HalftoneType 7.  (lib/gs_dps2.ps, lib/gs_init.ps,
    lib/gs_ll3.ps, lib/gs_res.ps, zht2.c)

    Finishes implementing ImageType 3 images.  (zimage.c, zimage3.c)

    Adds the hooks in ColorSpace defineresource and undefineresource for
    detecting definitions that interact with UseCIEColor.  (gs_res.ps)

    Implements UseCIEColor at the interpreter level.  (lib/gs_dps1.ps,
    lib/gs_ll3.ps, zcolor1.c, zcolor2.c, zimage.c, zmisc3.c)

    Touches up some formatting.  (igstate.h)

    Interpreter (PDF)

    Fixes problems:
    	- A MediaBox with a non-zero llx or lly would produce incorrect
    output.  The way we fixed this doesn't exactly match Acrobat, but it
    produces reasonable output.  (based on a change from Artifex 5.55)
    (lib/pdf_main.ps)
    	- Colored patterns didn't work properly.  (lib/pdf_draw.ps)
    	- The resources in a Pattern dictionary weren't made available
    during the execution of the PaintProc.  (fix from Artifex) (lib/pdf_draw.ps)

    Streams

    Adds a flag to the ASCIIHexEncode filter to indicate whether or not to write
    an EOD, required for Level 1 output from the pswrite device.  (sstring.h,
    sstring.c)

    Adds a close_at_eod flag to the stream state, for implementing reusable
    streams; also cleans up some formatting.  (stream.h, stream.c)

    Library

    Fixes problems:
    	- Black-and-white images with Interpolate = true produced
    undesirable artifacts if the image resolution was close to that of the
    device.  We now disable Interpolate in this case.  (gxiscale.c)
    	- In "async" mode, get_hardware_params did an unnecessary flush and
    reopen.  (from Artifex 5.50c) (gdevprna.c)
    	- The computation of the minimum band height for the "async" reader
    was incorrect. (from Artifex 5.50c) (gdevbmpa.c)
    	- The "fix" for reallocating async buffer memory in 5.50 was
    incorrect. (from Artifex 5.55) (gdevprn.c)
    	- The "async" reader called clist_finish_page, which it shouldn't.
    (from Artifex 5.50c) (gdevprn.c)
    	- The image enumeration procedures for ImageType 4 were unnecessary,
    since the ImageType 1 code now handles ImageType 4 as well.  (gximage4.c)
    	- The structure descriptor for tile clipping devices was
    unnecessary, since these are the same as mask clipping devices.  (gxclip2.h)
    	- There was a trailing comma in an enumeration list.  (gsbitops.c)
    	- Some compilers didn't like initializing a uint with ~0.
    (gdevm1.c)
    	- shfill unnecessarily saved, reset, and restored the graphics
    state.  (gscolor3.c)
    	- Radial shadings always extended the shading to radius = 0.
    (gxshade1.c)
    	- An identifier exceeded VMS's limit of 31 characters.  (gdevprn.h,
    gdevprn.c)
    	- A header file didn't #include enough of its prerequisites.
    (gxpcolor.h)
    	- Images with non-default ImageMatrix weren't written correctly in
    the band list. (bug introduced in 5.60)  (gximage1.c)
    	- Banded images that had to use the default implementation incurred
    an extra level of procedure call for each block of data.  (gxclimag.c)
    	- Images rotated by other than a multiple of 90 degrees produced
    incorrect output, because pie->rect.p.y was updated after each block of
    data, causing image_band_box to produce inconsistent results.  (bug
    introduced by async changes in 5.50) (gxclimag.c)
    	- The client_data pointer in client_order halftones wasn't traced
    correctly, possibly causing memory corruption if this type of halftone was
    used.  (These are not currently used by the PostScript interpreter.)
    (gsht.c, gsht1.c)
    	- ImageType 3 images didn't handle subrectangles.  (Not a problem
    for PostScript, which doesn't generate subrectangles, or for PCL, which
    doesn't use them.)  (gximage3.c)
    	- If a VMerror occurred when setting up an ImageType 3 image. an
    attempt could be made to free an uninitialized pointer.  (gximage3.c)
    	- ImageType 4 images with 1 to 8 bits per sample and Decode = [1 0]
    didn't test transparency correctly. (bug introduced in 5.60) (gximage.h,
    gxicolor.c, gximono.c, gxipixel.c)
    	- setgray, setrgbcolor, sethsbcolor, and setcmykcolor didn't use
    gs_cspace_assign, causing code duplication.  After this fix, we made the
    device color space types private, since there are no longer any references
    to them outside gscspace.c.  (gxcspace.h, gscolor.c, gscolor1.c, gscspace.c)
    	- gs_cspace_assign was misspelled cs_cspace_assign.  (gscspace.h)
    	- setgray didn't set the pattern pointer of the current color to 0,
    possibly causing the GC to retain patterns it shouldn't.  (gscolor.c)
    	- The dev_ht member of an imager (or graphics) state wasn't included
    in the macro that enumerates reference-counted pointers.  This probably had
    no effect, since the macro isn't used.  (gxistate.h)
    	- When the band rasterizer freed its imager state, the halftone and
    device halftone structures weren't freed, possibly causing memory leakage.
    (gsistate.c)

    Changes the default UCR and BG functions from f(k) = 0 to f(k) = k, per a
    user's suggestion.  We aren't sure which matches the Adobe implementations
    on color devices.  (gxdcconv.c)

    Conditionally removes some variables that are not needed on big-endian
    systems.  (gdevm1.c)

    Restructures some code to suppress bogus "possibly uninitialized variable"
    warnings.  (gxfixed.h, gdevddrw.c, gsmatrix.c, gsmisc.c, gxclimag.c)

    Adds a couple of unnecessary initializations to suppress bogus "possibly
    uninitialized variable" warnings.  (gsbitops.c)

    Implements BBox, Background, and Extend for shadings.  (Background isn't
    tested yet, because it only takes effect for pattern shading, which isn't
    implemented yet.)  (gsshade.h, gxacpath.h, gxistate.h, gxpath.h, gscolor3.c,
    gsshade.c, gxacpath.c, gxacpath.c, gxcpath.c)

    Brings the CMap machinery up to LL3, by allowing a single CMap to reference
    multiple fonts (usefont, usematrix, and array CIDSystemInfo).  (gsfcmap.h,
    gxfcmap.h, gsfcmap.c)

    Adds more tracing output to the band list reader.  (gxclrast.c)

    Cleans up some formatting.  (gstext.h, gxtext.h)

    Replaces FontType = 1, CharstringType = 2 with FontType = 2, to match the
    Adobe implementations.  (gxfont1.h, gxftype.h, gxtype1.h, gstype1.c,
    gstype2.c, gxtype1.c)

    Adds new gs_bytestring and gs_const_bytestring structures that may reference
    either string or (byte) object storage.  (gsstruct.h, gstypes.h, gsmemory.c)

    Implements an additional halftone type (ht_type_threshold2) needed for
    HalftoneTypes 6, 10, and 16.  We don't extend gshtx.[hc] to deal with this
    at this time, since the new type is only needed for the PostScript
    interpreter.  (gxht.h, gxhttype.h, gzht.h, gsht.c, gsht1.c, gshtscr.c)

    Adds a procedure for division mod M, possibly needed for halftones.
    (gxarith.h, gsmisc.c)

    Adds a -Z` debugging switch to turn off high-level images in the band list.
    (gxclimag.c)

    Implements gdev_prn_render_lines, as the lowest-level external API for
    rendering lines in a banded device.  This call replaces the "overlay" calls
    for async rendering.  (gdevprn.h, gdevprna.h, gxclist.h, gdevprn.c,
    gxclread.c)

    Extends the image enumeration API so that the enumerator can indicate what
    subset of the input planes it wants delivered on the next call to
    image_plane_data.  Currently this is only needed for ImageType 3.
    (gsimage.h, gxdevcli.h, gxiparam.h, gdevddrw.c, gsimage.c, gximage.c,
    gximage3.c)

    Extends the image enumeration structures to handle images that require a
    different amount of data for plane N than Width * plane_depths[N].  This
    requires a NON-BACKWARD-COMPATIBLE change to the argument list of the
    gx_image_enum_common_init procedure.  (gxiparam.h, gdevbbox.c, gsimage.c,
    gxclimag.c, gximage.c, gximage2.c, gximage3.c, gxipixel.c)

    Updates the copyright date to 1999.  (gscdef.c)

    Cleans up formatting, capitalizes macro names, etc.  (gximage.h, gxsample.h,
    gxipixel.c)

    Adds the UseCIEColor device parameter.  (gxdevcli.h, gxdevice.h, gsdparam.c)

    Implements color space substitution (UseCIEColor).  (gscolor2.h, gscspace.h,
    gscssub.h, gxistate.h, gzstate.h, gscolor.c, gscolor1.c, gscolor2.c,
    gscolor3.c, gscssub.c, gslib.c, gspcolor.c, gsstate.c)

    Changes the color space install procedure so that its color space argument
    is const.  Now all color space implementation procedures take a const
    argument.  (gscie.h, gxcspace.h, gscdevn.c, gscolor2.c, gscscie.c,
    gscspace.c, gscsepr.c, gspcolor.c)

    Changes gs_setcolorspace so its color space argument is const.  (gscolor2.h,
    gscolor2.c)

    Splits imager state procedures out of gsstate.c, which was getting too
    large.  (gxistate.h, gsstate.c, gsistate.c)

    Changes gs_imager_state_initialize so it really initializes the whole imager
    state.  (gsistate.c, gxclrast.c)

    Removes the now-redundant first (device) argument from the plane_data and
    end_image procedures in image enumerators.  Implementors of these procedures
    must now get the device from the enumerator structure.  This is a
    NON-BACKWARD-COMPATIBLE design cleanup that we have been putting off for
    most of a year.  Also adds an argument to plane_data so it can tell its
    client how many rows of data was used: this is needed for the implementation
    of ImageType 3.  (gxdevcli.h, gxiparam.h, gdevbbox.c, gdevplnx.c, gsimage.c,
    gxclimag.c, gxidata.c, gximage.c, gximage3.c)

    Changes CFFs with CharstringType = 2 to FontType 2 fonts, rather than
    FontType 1 with CharstringType = 2, for compatibility with Adobe's LL3
    implementations.  (gstype1.h)

    Version 5.66 (internal) (11/25/98)

    This fileset includes the ability to efficiently and conveniently obtain
    planar rather than chunky raster output.  It also fixes a large number of
    minor compilation problems on non-ANSI compilers, and a small number of real
    problems.  It also implements the PostScript LanguageLevel 3 clipsave and
    cliprestore operators.  Unfortunately, because of fragility in third-party
    code changes that we were forced to include in the base graphics library,
    overlapped rasterizing ("async mode") fails:

    	- At 300 dpi, for 4-bit planar devices in the low-memory ("partial
    	page") condition, and always for 32-bit planar devices.

    	- At 600 dpi, for all devices other than monochrome.

    Incompatible changes

    (Procedures)
    	- Every platform-specific makefile must now define _D_, the internal
    separator for defining preprocessor macros.
    	- Every platform-specific makefile must now define PSLIBDIR, the
    directory holding the PS initialization files at build time.  (This need not
    be the same as where these files are stored at run time.)

    (Library)
    	- New elements arch_float_mantissa_bits and
    arch_double_mantissa_bits have been added to arch.h.  Cross-build
    environments that supply arch.h rather than generating it at build time must
    add these elements.
    	- A new GB_SELECT_PLANES option has been added to the options mask
    for the get_bits_rectangle driver procedure.  Implementations of this
    procedure must take this option into account (although they do not have to
    implement it).
    	- The make_buffer_device printer device procedure has been replaced
    with create_buf_device, setup_buf_device, and destroy_buf_device.  All
    clients and implementors of make_buffer_device must be changed, including
    users of the clist_init_params macro.
    	- The gx_device_cmap_procs procedure has been replaced with
    gx_get_cmap_procs, which also take an imager state as an argument.  Callers
    of gx_device_cmap_procs must be changed.

    Documentation

    Updates Make.htm to clarify the standard directory structure.
    (doc/Make.htm)

    Adds a note about DEC C vs. VAX C for remapping of exit codes.
    (doc/Make.htm)

    Clarifies that the end_image procedure frees the enumerator.  (gxiparam.h)

    Procedures

    Fixes problems:
    	- The genxxx utilities didn't compile properly on systems where the
    C compiler doesn't automatically search for .h files in the directory of the
    .c file.  (unixtail.mak)
    	- Preprocessor definitions require special quoting with Watcom C.
    Fixing this required adding a _D_ macro similar to II.  This is a
    NON-BACKWARD-COMPATIBLE change, since this definition is now required in
    each platform-specific makefile.  (dvx-head.mak, openvms.mak, os2.mak,
    unixhead.mak, wccommon.mak, winlib.mak, zlib.mak)
    	- The VMS subdirectories didn't include the "." to make the
    directory name relative.  (openvms.mak)
    	- Some of the OpenVMS command files were omitted from the
    distribution.  (copy_one.com, rm_one.com, rm_all.com)
    	- MMK interprets a final - on a command line as a continuation
    marker.  (gs.mak)
    	- gsiparm4_h was used before being defined.  (lib.mak)
    	- Compiled initialization code (COMPILE_INITS=1) was broken because
    of the introduction of subdirectories.  (bcwin32.mak, dvx-gcc.mak,
    msvc32.mak, openvms.mak, os2.mak, unix-gcc.mak, unixansi.mak, unixtrad.mak,
    watc.mak, watcw32.mak, int.mak, geninit.c)
    	- Level 1 configurations would no longer build with the standard set
    of drivers.  (devs.mak)
    	- wmake interpreted "&" in a rule command line as calling for
    background execution.  (wccommon.mak)

    Makes the standard set of features the same on all platforms, namely, psl3
    (PostScript LanguageLevel 3) + pdf (PDF 1.2/1.3) + dpsnext (DPS with NeXT
    extensions) + ttfont (ability to load TrueType fonts directly).  Unix
    platforms add pipe (recognition of %pipe% file names).  (bcwin32.mak,
    dvx-gcc.mak, msvc32.mak, openvms.mak, os2.mak, unix-gcc.mak, unixansi.mak,
    unixtrad.mak, watc.mak, watcw32.mak)

    Adds minimal support for Windows 95/NT compiler versions.  (wccommon.mak)

    Notes a set of switches that may work around the optimizer bug in MSVC++
    5.0.  (msvccmd.mak)

    Utilities

    Adds a switch to genconf to set the escape character, since wmake interprets
    "&" in a rule command line as calling for background execution.  (genconf.c)

    Makes echogs recognize -+ alone as equivalent to - alone, for the sake of
    VMS systems, which interpret a final - as a line continuation marker.
    (echogs.c)

    Adds a viewpsm procedure to viewpbm.ps, for reassembling plane-separated
    files.  (lib/viewpbm.ps)

    Drivers

    Fixes problems:
    	- There were places where the code assumed that void * could be
    coerced to byte *, which not all C compilers support.  (gdevpdfx.h,
    gdevpdfo.c)
    	- The name put_bytes was defined in two places, causing an error
    when linking with NOPRIVATE=1.  (gdevpx.c)
    	- The minimum space computation for high-level images and for the
    scan line length for the sample async driver was slightly too small.
    (gdevbmpa.c)

    Improves the tracing output from the psm driver.  (gdevpbm.c)

    Rewrites some macros to eliminate "statement not reached" compiler warnings.
    (gdevpx.c)

    Revises the (only) client for changes in the plane-extraction device API.
    (gdevpbm.c)

    Adds plane-separated BMP drivers, primarily for testing but also as an
    example.  bmp[a]sep1 and bmp[a]sep8 produce 1- and 8-bit-per-pixel separated
    CMYK.  (gdevbmp.h, gdevbmp.c, gdevbmpa.c, gdevbmpc.c)

    Platforms

    Fixes problems:
    	- The Watcom environment doesn't provide the st_blocks member of the
    stat structure.  (stat_.h)
    	- In its standard configuration, the Watcom environment doesn't
    provide stdprn.  (gp_iwatc.c)
    	- Newer versions of DEC C on OpenVMS don't require the remapping
    of the exit codes.  (stdpre.h)

    Revises the dummy implementation of semaphores, monitors, and threads in an
    attempt to make async rendering (just barely) work for the non-overlay case.
    Unfortunately, this turned out not to be feasible.  (gp_nsync.c)

    Interpreter

    Fixes problems:
    	- Certain DEC compilers assume that a pointer is aligned even if it
    is cast to a pointer whose target type has weaker alignment; this produced
    "unaligned access" errors in the interpreter.  (interp.c)
    	- A necessary cast was omitted.  (zcrd.c)
    	- Level 1 configurations would no longer run.  (lib/gs_init.ps)

    Updates clients to set mask image fattening properly.  (zimage.c, zimage2.c)

    Rewrites some macros to eliminate "statement not reached" compiler warnings.
    (files.h, istruct.h)

    Interpreter (PDF)

    Fixes problems:
    	- The test for whether to honor the Rotate key was backwards.  (bug
    probably introduced in 5.24) (lib/pdf_main.ps)

    Updates the code to handle improper PDF files in which the startxref and the
    following file position appear on the same line rather than (as required by
    the spec) two successive lines.  (lib/pdf_main.ps)

    Streams

    Notes a bug in s_DCT_get_quantization_tables.  (sdcparam.c)

    Library

    Fixes problems:
    	- The algorithm for reducing 4-bit chunky to 1-bit separated colors
    didn't handle the trailing pixels of a transfer correctly.  (gdevplnx.c)
    	- Banding for RGB devices with multi-plane halftones was broken.
    (bug introduced recently) (gxdcolor.c)
    	- Mask images were written in the band list with inverted polarity.
    (bug introduced in 5.60) (gximage1.c)
    	- Mask images were always fattened.  Fixing this required extending
    the API, since gs_image_t_init_mask set adjust = true by default (a bad
    decision) and we didn't want to change it.  (gschar.h, gscpm.h, gsiparam.h,
    gzstate.h, gschar.c, gximage1.c)
    	- The member names push and pop caused problems for compilers whose
    preprocessors consider it an error to use a macro defined with arguments as
    a name without arguments.  (gxfont1.h, gstype1.c)
    	- Once again, gcc didn't detect some private/non-private mismatches.
    (gdevplnx.c, gsalphac.c, gximage2.c, gximage4.c)
    	- & was used with an array (which gcc doesn't complain about).
    (gxshade6.c)
    	- There were several uses of automatic aggregate initialization,
    which not all C compilers support.  (gdevprn.c, gdevps.c)
    	- There were places where the code assumed that void * could be
    coerced to byte *, which not all C compilers support.  (gdevprn.c)
    	- Some \ line continuation characters were used inappropriately
    (in a macro argument list).  (gxclimag.c)
    	- Some function prototypes didn't use the Pn macros.  (gsalloc.c)
    	- A function definition not at the left margin confused ansi2knr.
    (gsfont.c)
    	- A cast for the result of malloc, needed on systems where malloc
    returns a char * rather than a void *, was missing.  (gsmalloc.c)
    	- An occurrence of dev should be pdev.  (I can't understand how we
    missed this in 5.65.)  (gdevprna.c)
    	- A value was missing from a list of initial structure values,
    causing mismatches between subsequent values and the members they
    initialized.  (gcc treated this as a warning: it should have given an
    error.)  (gxband.h)
    	- When setting the tile phase during banding, the old value of the
    tile phase was written out rather than the new one.  (gxclutil.c)
    	- The definition of fixed_mult_quo wasn't consistent between systems
    with FPU (where it took the floor, and might be slightly inaccurate) and
    systems without FPU (where it truncated towards zero, and was accurate).
    (gxfixed.h, genarch.c, gsmisc.c)
    	- Banding devices using multi-screen halftones didn't set the
    halftone phase correctly.  We have now "fixed" this problem at least 4
    times.  (gxclrast.c)
    	- The name put_bytes was defined in two places, causing an error
    when linking with NOPRIVATE=1.  (gsparams.c)
    	- For [x][y]show, the pointers to the width arrays weren't
    initialized, causing memory access errors when checking or garbage
    collecting.  (gschar.c)
    	- Due to a typo, bitmap characters were fattened too much.
    (gximage1.c)
    	- Some identifiers exceeded VMS's limit of 31 characters.
    (gdevprn.h, gscsepr.h, gsdevice.h, gxdevice.h, gdevdflt.c, gdevprn.c,
    gscsepr.c, gsdparam.c)
    	- The device halftone parameter was declared const inappropriately
    in some places.  (gsdcolor.h, gxdither.h, gxdcolor.c, gxdither.c)
    	- gdev_mem_raster was used (misleadingly, even though it happened to
    produce the correct result) on possibly non-memory devices.  (gxclread.c)
    	- Pure Level 1 configurations had some undefined procedures.
    (gscolor1.c, gscspace.c)
    	- Indexed color images could incorrectly conclude that they didn't
    need to re-render halftones, producing incorrect output.  (gximono.c)
    	- gs_device_is_memory returned false for non-banding printer
    devices: this didn't used to matter, but it matters now.  We changed it to
    test the procedures rather than the device name.  (gdevmem.c)
    	- The plane extraction device didn't handle halftoned colors
    correctly.  (gdevplnx.c)
    	- If an error occurred while building a Function object, a crash
    could occur while freeing the partially built object.  (gsfunc.c)
    	- The plane extraction device didn't handle RasterOps correctly.
    (gdevplnx.c)
    	- The colors-used mask could include some additional, invalid bits.
    (gxclrect.c)
    	- The colors-used mask was updated incorrectly for RasterOps on
    subtractive-color devices.  (gxclrect.c)
    	- Memory devices didn't set enough option bits for the case where
    get_bits_rectangle had to do conversion.  (gdevmem.c)
    	- The TrueType font rasterizer didn't accept fonts whose 'type' was
    "true" rather than the documented <00 01 00 00>.  (gstype42.c)
    	- A bug in the Watcom compiler caused two conditional expressions to
    execute incorrectly.  (gstype42.c)
    	- When a page queue was freed, it attempted to free the page_info
    resource in the reserve entry, which is actually unused.  (gxpageq.c)
    	- A necessary #include was missing.  (gdevmr2n.c)

    Reduces the size of band list entries for halftoned colors somewhat.
    (gxclpath.h, gxclpath.c, gxclrast.c)

    Increases the number of saved band color masks per page, mostly for testing.
    (gxband.h)

    Rewrites some macros, and one 'for' statement, to eliminate "statement not
    reached" compiler warnings.  (gxcldev.h, gxpath2.c)

    Corrects a tiny inaccuracy in the computation of trapezoid coordinates.
    (gdevddrw.c)

    Edits the trapezoid fill code for greater readability and better
    documentation of its functioning.  The new code runs a little slower on
    compilers that don't support 'inline'.  (gdevddrw.c)

    Improves the documentation of the tile phase bookkeeping.  (gxclrast.c)

    Documents the fact that fixed_mult_quo takes the floor if the first argument
    is negative.  (gxfixed.h)

    Finishes implementing clipsave and cliprestore.  (gxclipsr.h, gxistate.h,
    gzstate.h, gsclipsr.c, gsstate.c)

    Implements driver access to planar, rather than chunky, banding.
    (gdevplnx.h, gdevprn.h, gxclist.h, gxdevcli.h, gxrplane.h, gdevplnx.c,
    gdevprn.c, gxclread.c)

    Makes it possible to set up memory devices that allocate just the line
    pointer table (but not the bitmap), or neither the line pointers nor the
    bitmap.  (gxdevmem.h, gdevmem.c)

    Moves gx_device_white/black to a more appropriate header file.  (gxdcolor.h)

    Moves gx_default_make_buffer_device to a more appropriate file.
    (gdevdflt.c, gdevprn.c)

    Adds plane extraction and expansion utility procedures, required for the
    extended capability of get_bits_rectangle.  (gsbitops.h, gsbitops.c)

    Extends get_bits_rectangle so it can return individual planes rather than
    all planes.  (gdevplnx.h, gsbittab.h, gxbitfmt.h, gxgetbit.h, gdevdgbr.c,
    gdevdrop.c, gdevmem.c, gdevplnx.c, gsalphac.c, gsbittab.c)

    Factors out the two more complex cases of gx_get_bits_copy into single-use
    procedures for readability.  (gdevdgbr.c)

    Makes public the procedure for reducing a colored halftone to a pure or
    binary halftone, needed for planar rendering.  (gxdither.h, gxdither.c)

    Moves the client_data pointer from gs_state to gs_imager_state.
    (gxistate.h, gzstate.h, gsstate.c)

    Extends the plane extraction device to handle fill_mask and images
    efficiently.  (gxcmap.h, gdevplnx.h, gdevplnx.c)

    Creates a procedure to make a temporary copy of a gs_imager_state, needed
    for planar image processing.  (gxistate.h, gsstate.c)

    Makes getting the color mapping procedures for a device a virtual procedure
    of the imager state, needed for planar image processing.  (gxcmap.h,
    gxistate.h, gxcmap.c, gxicolor.c, gximono.c, gxi12bit.c)

    Increases the amount of memory allocated to the asynchronous rasterizer,
    since we now may need a dynamically allocated line pointer table for the
    target (plane) memory device.  (gdevprna.c)

    Adds a record of which bands have "difficult" RasterOps -- RasterOps that
    can't be executed, even in principle, in CMYK space.  We don't do anything
    with this information yet, but we will have to.  (gsropt.h, gxband.h,
    gxcldev.h, gxclpath.h, gxclist.c, gxclpath.c, gxclrect.c)

    Makes conversion from render_plane indices to bit ranges the responsibility
    of the device, not the client.  (gxrplane.h)

    Version 5.65 (internal) (11/13/98)

    The main purpose of this fileset is to fix the MS Windows and OpenVMS build
    procedures, which have been broken since 5.60.  It also adds the ability for
    a driver to determine efficiently which colors are used in a given page or
    band, which is important for separated color printing, and contains some
    early support for plane-separated color printing.

    Incompatible changes

    (Procedures)
    	- Every platform-specific makefile must now define D_ and _D, the
    brackets for defining preprocessor macros.
    	- The unix-cc.mak makefile has been renamed unixtrad.mak, since it
    only applies to "traditional C" compilers.

    (Drivers, Library)
    	- Devices now store their TextAlphaBits and GraphicsAlphaBits values
    explicitly.  The former get_alpha_bits procedure is obsoleted, and no
    longer implemented or called by any code we distribute.
    	- gx_device_color_info now has additional fields.  Code that
    constructed gx_color_info_values in any way other than by using the dci_
    macros will no longer work.

    Documentation

    Fixes problems:
    	- The -sPSFile= switch was still documented, even though it no
    longer exists.  (doc/Use.htm)
    	- The - "switch" wasn't documented in the list of switches,
    although it was documented elsewhere.  (doc/Use.htm)
    	- The documentation for the PC environments was out of date -- it
    didn't mention the use of subdirectories.  (doc/Make.htm)

    Updates the documentation on PostScript files to indicate in what directory
    the files are distributed.  (doc/Psfiles.htm)

    Documents more of the utility procedures used by printer drivers.
    (gdevprn.h)

    Notes that the public tar archives may not be compatible with the tar
    program in SunOS 4.1.3.  (doc/Make.htm)

    Adds documentation on the Unix "make pg" target.  (doc/Make.htm)

    Updates documentation to reflect the name change from unix-cc.mak to
    unixtrad.mak.  (doc/Make.htm)

    Adds some links for the benefit of people who have built Ghostscript before
    and therefore skip reading the initial sections of the documentation.
    (doc/Make.htm)

    Documents the new -_ switch.  (doc/Use.htm)

    Updates the documentation to mention PostScript LanguageLevel 3 and to
    remove many references to 16-bit systems.  (doc/Language.htm)

    Procedures

    Fixes problems:
    	- A cast discarded `const' needlessly.  (genconf.c)
    	- Upper-case echogs switches were getting converted to lower case
    on VMS.  (jpeg.mak)
    	- $(EXP) was missing before some invocations of executables.
    (gs.mak, jpeg.mak, lib.mak)
    	- Some dependencies in the Unix install script were incorrect.
    (unixinst.mak)
    	- Because of differences between shells, putting *.upp in the list
    of files to be installed didn't work with some shells.  (unixinst.mak)
    	- The PC makefiles were out of date.  (bcwin32.mak, pcwin.mak,
    winint.mak, winlib.mak, dwmain.rc, gsdll32.rc)
    	- Some makefiles still used $(DEV) instead of dev.  (dvx-tail.mak,
    msvclib.mak, openvms.mak, os2.mak, pcwin.mak, watclib.mak, winlib.mak)
    	- The DEVICE_DEVSn lists overflowed the DOS 120-character command
    line limit again.  We had to add DEVICE_DEVS16 through 20 to work around
    this.  (*.mak)
    	- Preprocessor definitions have a different syntax on VMS.  Fixing
    this required adding D_ and _D macros, similar to I_ and _I.  This is a
    NON-BACKWARD-COMPATIBLE change, since these definitions are now required in
    each platform-specific makefile.  (dvx-head.mak, openvms.mak, os2.mak,
    unixhead.mak, wccommon.mak, winlib.mak, zlib.mak)

    Adds command line switches to generate additional warnings when compiling
    the auxiliary programs with gcc.  (unix-gcc.mak)

    Gets rid of the EXPP and SHP macros, since they aren't used or needed any
    longer.  (gs.mak, bcwin32.mak, dvx-head.mak, msvccmd.mak, openvms.mak,
    os2.mak, unixhead.mak, watcw32.mak, wccommon.mak)

    Changes the Unix EXP to null, since all executables now use an explicit
    directory prefix.  (unixhead.mak)

    Renames unix-cc.mak as unixtrad.mak, since people with ANSI-compatible cc
    were getting confused.  (unix-cc.mak [deleted], unixtrad.mak)

    Adds a -_ switch, for piped execution with buffering.  (iminst.h,
    imainarg.c)

    Utilities

    Fixes problems:
    	- The revised ansi2knr didn't recognize "foo(void)" as a procedure
    definition.  (ansi2knr.c)
    	- ansi2knr didn't handle function definitions where the last
    formal parameter was a procedure parameter.  (ansi2knr.c)

    Adds a utility for printing an informative error page if a PostScript job
    fails.  (lib/errpage.ps, doc/Psfiles.htm, unixinst.mak)

    Drivers

    Fixes problems:
    	- The [e]pswrite drivers produced incorrect output for images in
    non-Device color spaces.  We fixed this by causing all other images to be
    handled as rectangles.  This is clearly not satisfactory: we need to unify
    the PS and PDF writers in this area.  (gdevps.c)
    	- The CCITTFaxEncoded data produced by the [e]pswrite driver had
    both a Rows value and an EndOfBlock marker, which wasn't compatible with
    some Adobe interpreters.  (gdevpsdf.c)
    	- X devices couldn't be copied, because the copy didn't clear the
    list of X fonts and therefore tried to free it a second time.  (gdevx.c,
    gdevxini.c)
    	- gdevx.h declared a type called rect, conflicting with variables
    named rect.  (gdevx.h, gdevx.c)
    	- A function definition wasn't formatted properly to be
    recognized by ansi2knr.  (gdevupd.c)
    	- The PCL XL drivers crashed if given a masked image.  (gdevpx.c)

    Adds a PBM driver that writes separated CMYK, using the colors-used masks to
    skip bands.  (devs.mak, gdevpbm.c)

    Updates drivers that formerly supported the TextAlphaBits and
    GraphicsAlphaBits parameters themselves.  (gdevmswn.h, gdevsvga.h,
    gdevpbm.c, gdevmswn.c, gdevpm.c, gdevwdib.c, gdevsvga.c, gdevxalt.c)

    Platforms

    Fixes problems:
    	- The stack size on the Watcom platform was set too small.
    (watc.mak)
    	- The OpenVMS platform code and makefiles had gotten out of date.
    (gp_vms.c, openvms.mak)

    Interpreter

    Fixes problems:
    	- The size of Indexed color space lookup tables wasn't set, possibly
    causing them to be corrupted during garbage collection.  (zcsindex.c)
    	- A function definition wasn't formatted properly to be
    recognized by ansi2knr.  (icontext.c)
    	- quit was only rebound to stop in encapsulated jobs, rather than in
    any context under control of a job server.  Since we don't currently have
    any explicit way to indicate whether execution is under control of a job
    server, we consider that it is under a job server iff startjob has ever been
    executed.  (lib/gs_lev2.ps)

    Adds tracing output for removing an entry from a dictionary.  (idict.c)

    Slightly improves dictionary deletion so that it can replace a run of
    deleted keys with empty keys.  (idict.c)

    Adds statistics-gathering to the interpreter.  (interp.c)

    Adds more statistics-gathering to the dictionary stack search.  (idstack.c)

    Improves the debugging printout of packed arrays.  (idebug.c)

    Increases the name table allocation increment from 128 names (1.5K) to 256
    names (3K), to provide better scattering of name indices.  (inamedef.h)

    Changes the name count / index mapping to provide better scattering.
    (inamedef.h)

    Interpreter (PDF)

    Fixes problems:
    	- If a font other than the base 14 wasn't embedded and lacked a
    descriptor, an error occurred.  (The PDF specification explicitly prohibits
    this, but Acrobat PDFWriter 3.02 for Windows produces PDF files with
    TrueType fonts that lack a descriptor.)  (lib/pdf_font.ps)

    Library

    Fixes problems:
    	- The computation of colors used by CMYK halftones was incorrect.
    (gxclpath.c)
    	- Some header files had preprocessor directives with a space before
    the #, which pre-ANSI compilers don't accept.  (gpsync.h, gsjconf.h,
    gsmemlok.h, gxsync.h, gxxfont.h)
    	- A number of prototypes didn't use the Pn macros.  (gscolor2.h,
    gscsepr.h, gsptype1.h, gspcolor.c)
    	- A function definition wasn't formatted properly to be
    recognized by ansi2knr.  (gxcht.c)
    	- The algorithm for reducing single-plane CMYK halftones to binary
    halftones was incorrect (bug introduced in 5.60).  (gxdither.c)
    	- Writing a degenerate triangle or parallelogram in the band list
    could cause a memory access error when rasterizing.  (gxclrast.c)

    Adds per-band "colors used" information to the information for a saved page,
    and procedures (gdev_prn_colors_used and gx_page_info_colors_used, defined
    in gdevprn.h) for accessing it.  (gdevprn.h, gxband.h, gxclist.h, gdevprn.c,
    gxclist.c)

    Adds an internal device that appears to clients as a multi-plane color
    device, and extracts a single plane for actual rendering.  This device will
    be used to support planar output devices.  (gdevplnx.h, gsbitops.h,
    gdevplnx.c)

    Adds explicit color_info.text_anti_alias_bits and graphics_anti_alias_bits
    values in the device state, obsoleting the get_alpha_bits procedure, and
    makes them settable for all devices.  (gxdevcli.h, gxdevice.h, gdevabuf.c,
    gdevdflt.c, gdevnfwd.c, gdevprn.c, gsdparam.c)

    Reformats some code for readability.  (gxdither.c)

    Adds a tentative API for a procedure that allows band rasterizing directly
    into client's memory.  This is tentative because we may need to add the
    ability to select an individual plane.  (gdevprn.h)

    Version 5.64 (internal) (11/5/98)

    This is another incremental fileset to fix problems for an external
    customer.

    Incompatible changes

    (Drivers)
    	- The output_page procedure of all drivers now must call
    gx_finish_output_page as its last action.  (This doesn't affect ordinary
    printer or raster file drivers, which already call a common procedure.)

    Documentation

    Fixes problems:
    	- The instructions for creating 'makefile' on Unix systems were
    out of date.  (doc/Make.htm)

    Procedures

    Fixes problems:
    	- An omitted return statement caused genconf to malfunction on some
    platforms.  (genconf.c)
    	- The replacement of MAKEFILES by TOP_MAKEFILES accidentally changed
    some comments that should not have been changed.  (bcwin32.mak, gs.mak,
    msvctail.mak, openvms.mak, os2.mak, watcw32.mak, wctail.mak, winlib.mak)

    Drivers

    Updates drivers to call gx_finish_output_page where needed.  (gdev3b1.c,
    gdevcgm.c, gdevcp50.c, gdevpdf.c, gdevmswn.c, gdevpm.c, gdevps.c, gdevpx.c,
    gdevsnfb.c, gdevwprn.c, gdevx.c)

    Library

    Fixes problems:
    	- The FontBBox workaround introduced in 5.63 didn't work properly.
    (zchar1.c)
    	- PageCount was getting incremented in the first device of a device
    pipeline, rather than in the last one and being propagated back.
    (gxdevice.h, gdevbbox.c, gdevdflt.c, gdevnfwd.c, gdevprn.c, gdevprna.c,
    gsdevice.c)

    Version 5.63 (internal) (11/4/98)

    This fileset was driven by the development needs of an external customer,
    primarily related to asynchronous rendering.  It includes a few bug fixes as
    well.

    Incompatible changes

    (Procedures)
    	- In the makefiles, changes the name MAKEFILES to TOP_MAKEFILES.

    (Library)
    	- The pis member of the Type 1 interpreter state was renamed in
    order to catch places that assumed it was set.  (It may now be 0.)  This
    should not affect any client code.
    	- gx_page_queue_dnit and gx_page_queue_finish_dequeue now free the
    band list information associated with the page_info in the queue entry.  An
    explicit call of gx_page_queue_entry_free_page_info is now required to free
    this information before any other call of gx_page_queue_entry_free.

    Documentation

    Fixes problems:
    	- devs.mak incorrectly referred to msdevs.mak rather than pcwin.mak.
    (devs.mak)

    Procedures

    Fixes problems:
    	- There was a $ in the makefile that wasn't quoted.  (unix-gcc.mak)
    	- The name MAKEFILES has a special meaning in GNU make which only be
    disabled by using a directive that is a syntactic error for standard 'make'
    implementations.  We had to work around this by changing all occurrences of
    MAKEFILES to TOP_MAKEFILES.  (*.mak)
    	- genconf did the wrong thing for modules with names shorter than
    5 characters.  (genconf.c)

    Drivers

    Updates the Canon BJC library, changing the names of the files.  This code
    is still very preliminary.  (gdevbjcl.h, gdevbjcl.c)

    Interpreter

    Fixes problems:
    	- Some Type 1 fonts have a plausible but incorrect (too-small)
    FontBBox, causing some characters to be clipped.  We work around this by
    enlarging the FontBBox and restarting the rasterization if the outline goes
    outside the FontBBox.  (zchar1.c)

    Library

    Fixes problems:
    	- gx_default_strip_copy_rop didn't check for zero width before
    dividing by it.  (gdevdrop.c)
    	- Some places that called a procedure returning void tried to use
    the return value.  (gximage.c, gximage1.c, gximage4.c)
    	- The flatness for rendering Type 1 characters was set incorrectly
    (always set to 0, producing best accuracy at extra cost) for characters not
    in portrait orientation.  (gxtype1.c)
    	- clist_begin_typed_image incorrectly used the memory manager client
    name "clist_begin_image".  (gxclimag.c)
    	- If a page queue entry was created without a page_info, the entry's
    page_info wasn't initialized, probably causing a crash when attempting to
    free the (nonexistent) associated band files later.  (gxpageq.c)

    More fully supports the use of saved page_info objects for decoupling banded
    rendering from band list construction:
    	- Adds the ability to close and free the command list associated
    with a saved page.  (gxclist.h, gxclist.c)
    	- Separates freeing of the band list information associated with a
    page queue entry from freeing the entry itself.  (gxpageq.h, gxpageq.c)
    	- Changes the rendering thread for asynchronous band rendering so
    that it doesn't try to free the band list information twice.  (gdevprna.c)

    Implements triangles and parallelograms in the band list, primarily for the
    sake of smooth shading.  (gxclpath.h, gxclist.c, gxclpath.c, gxclrast.c)

    Adds a rectangle merging procedure, parallel to rectangle intersection.
    This is needed for the FontBBox fix.  (gsrect.h)

    Adds logic for keeping track of what pixel values are used in which bands.
    Currently this information is not used for anything.  (gdevmrop.h, gsropt.h,
    gxcldev.h, gxclpath.h, gxclrect.c, gxclpath.c, gxclimag.c)

    Updates a few more files for readability and coding conventions.
    (gxband.h, gxpageq.c)

    Updates users of gxband.h and gxpageq.h.  (gdevprn.h, gxclist.h, gxpageq.h,
    gdevprna.c, gxclpage.c, gxclread.c)

    Moves the definition of the page queue into the (private) implementation
    file.  (gxpageq.h, gxpageq.c)

    Version 5.62 (internal) (10/31/98)

    This fileset concludes this round of work on (primarily color) performance
    improvement.  It contains almost no new bug fixes.

    Incompatible changes

    (Library)
    	- Clients that load the CIE caches themselves must now reset the
    procedures to the _from_cache values.  (This affects the PostScript
    interpreter, but no ordinary library clients.)
    	- gs_cie_compute_wbsd (an internal procedure) was changed to
    gs_cie_compute_points_sd, with different parameters.

    Documentation

    Adds information about problems with PDF files copied from Macintosh
    environments.  (doc/Use.htm)

    Drivers

    Adds a library for generating Canon BJC commands.  This code is subject to
    change without notice!  (gdevcbjc.h, gdevcbjc.c)

    Interpreter

    Fixes problems:
    	- The structures allocated for CIE RenderTables weren't marked
    correctly for garbage collection, possibly mangling the output.  (zcie.c)
    	- The CIE color space procedures weren't reset after the cache was
    loaded, producing incorrect output now that it matters.  (zcie.c, zcrd.c)

    Library

    Fixes problems:
    	- Under some circumstances, a setbbox didn't take effect.
    (gxpcopy.c)
    	- The last step of CIE color mapping didn't clamp the very top end
    of the range correctly.  (gsciemap.c)

    Speeds up bits_replicate_horizontally a bit more.  (gsbitops.c)

    Separates the CIE color mapping code from CIE cache loading, since the file
    was getting too big.  (gscie.h, gscie.c, gsciemap.c)

    Finishes adding the hooks for skipping steps during CIE color mapping when
    possible, and implements one case of step-skipping.  (gscie.h, gscie.c,
    gsciemap.c, gscrd.c)

    Adds more tracing to the CIE color machinery.  (gscie.c)

    Changes the default number of tiles for the colored halftone screen caches
    from 1 to 4, substantially reducing cache turnover.  (gsht1.c, gshtx.c,
    gxclrast.c)

    Version 5.61 (internal) (10/28/98)

    More rendering speedups, and fixes for many of the minor problems reported
    in 5.50.

    Docmentation

    Fixes problems:
    	- There were still some incorrect references to .txt files.
    (gs.mak, libpng.mak)
    	- Two references to libpng should have referred to libjpeg.
    (gs.mak)

    Procedures

    Fixes problems:
    	- GNU 'make' treats the name MAKEFILES specially.  (unix-gcc.mak)
    	- genconf didn't sort libraries in the right order.  (genconf.c)
    	- The dependency for ansi2knr, and the invocation of ccgs, didn't
    include the directory name.  (ccgs, unix-cc.mak)
    	- The CC_ and CCAUX rules didn't invoke the new ccgs correctly.
    (unix-cc.mak)
    	- There was a typo in a comment.  (unixtail.mak)
    	- gcc versions of the form 2.7.2.f.1 weren't recognized as having
    the const-related code generation bug.  (unix-gcc.mak)

    Documents workaround for bugs in newer IRIX compilers.  (doc/Make.htm)

    Utilities

    Fixes problems:
    	- ansi2knr didn't understand the new formatting of the enum_ptrs and
    reloc_ptrs procedures, which now don't have a left brace on the same line as
    the macro call that defines the procedure.  (ansi2knr.c)

    Adds a utility for viewing MIFF files.  (lib/viewmiff.ps)

    Drivers

    Fixes problems:
    	- The X driver could report a depth (e.g., 15 bits) that caused
    problems elsewhere.  (gdevxini.c)
    	- With the X driver, if the display is grey-scale or does not have
    enough colors to allocate a color ramp, Ghostscript crashed in
    x_map_color_rgb due to an array index overflow.  (gdevx.c)
    	- The PDF writer used the X scaling of fonts to determine the point
    size rather than the Y scaling, which gives the wrong result for synthetic
    condensed fonts.  (gdevpdft.c)
    	- If the last thing written before a flushpage was text, the X
    driver might fail to display it.  (gdevx.c)
    	- The PDF writer didn't free the streams created for image
    compression, causing a memory leak.  (gdevpsdf.c)
    	- pswrite didn't output a command to set the page size.  (gdevps.c)

    Removes an obsolete comment and commented-out line.  (gdevxalt.c)

    Interpreter (PDF)

    Fixes problems:
    	- Explicit (not resource) Indexed color spaces caused an error.
    (lib/pdf_draw.ps)

    Streams

    Fixes problems:
    	- The PNGPredictor filters didn't free their row buffer.  (spngp.c)
    	- The PNGPredictor filters didn't handle end-of-data correctly.
    (spngp.c)

    Changes the eexec filter to ignore % characters when reading
    ASCIIHex-encoded data.  This is contrary to the Adobe documentation, but one
    badly coded prologue requires it.  (seexec.c)

    Library

    Fixes problems:
    	- The definition of TRANSPARENCY_PER_H_P was in the wrong module,
    causing it to be ignored.  (gdevmrop.h, gdevdrop.c)
    	- There was a typo in the tracing output for init_tile_cursor.
    (gxcht.c)
    	- gx_get_bits_copy computed the standard raster incorrectly if
    the destination used a different color representation from the source,
    causing multi-line transfers to be done incorrectly.  (gdevdgbr.c)
    	- Parentheses were missing around the use of width_bits in the
    definition of bitmap_raster, possibly causing incorrect computation.
    (gxbitmap.h)
    	- When rendering a Pattern, a singular CTM caused an error even if
    the Pattern was empty.  (gspcolor.c)
    	- The lookup table wasn't allocated for device-originated CRDs.
    (gscrdp.c)
    	- If an error occurred when setting up to rasterize a band,
    data_bits could be freed without ever having been initialized.  (gxclrast.c)
    	- Processing a CIE-color image with a color space different from the
    current color space caused an error.  (gscie.c)
    	- The speedup for bits_replicate_horizontally had an algorithm
    error, producing incorrect output.  (gsbitops.c)

    Splits up the memory device implementation of RasterOp, since the file was
    getting too large.  (gdevmem.h, gdevm1.c, gdevm8.c, gdevm16.c, gdevm24.c,
    gdevm32.c, gdevmrop.c [deleted], gdevmr1.c, gdevmr2n.c, gdevmr8n.c,
    gsnorop.c)

    Cleans up a little formatting.  (gsbittab.h)

    Speeds up the default RasterOp implementation some more.  (gdevdgbr.c,
    gdevdrop.c, gdevmem.c)

    Speeds up testing whether a given halftone level is already present in its
    cache.  (gzht.h, gxht.c)

    Speeds up 1-bit CMYK halftones a bit more.  (gxcht.c)

    Makes filling always use the (much faster) trapezoid-based algorithm if the
    region being filled is a rectangle.  (gxfill.c)

    Version 5.60 (internal) (10/18/98)

    This fileset incorporates many performance enhancements for 1-bit CMYK
    devices, especially for PCL 5c interpretation.

    This fileset divides the files into subdirectories.  In the lists of changed
    files, files with no explicit subdirectory name are in the src subdirectory.
    The revised OpenVMS and OS/2 makefiles have not been tested.

    Incompatible changes

    (Procedures)
    	- The instructions for font compilation in doc/Fonts.htm are
    different.
    	- The fileset has been split into multiple directories; the source
    code and makefiles are now in src/.
    	- The top-level makefile requires a definition for BINDIR for the
    directory to hold the final executable.
    	- Every .dev rule of the form
    		xxx.dev: <list>
    			$(SETyyy) xxx <items>
    			$(ADDMOD) xxx <items>
    must be changed to
    		$(DD)xxx.dev: <list>
    			$(SETyyy) $(DD)xxx <items>
    			$(ADDMOD) $(DD)xxx <items>
    (DD for drivers, PSD for PostScript/PDF-interpreter features, GLD for
    graphics library features).  Every -include and -replace option in the
    makefiles rules, and every element of FEATURE_DEVS and DEVICE_DEVS*, must be
    changed similarly.  This is very unfortunate, especially since people
    editing FEATURE_DEVS and DEVICE_DEVS* must now know which subsystem
    implements a particular feature; but we tried 3 different ways to get the
    generated .dev files out of the top-level directory, and this was the only
    one we could make work.
    	- Top-level makefiles must define both MAKEFILE and MAKEFILES,
    the latter to include any subsidiary makefiles that define configuration
    parameters.  Dependencies on $(MAKEFILE) must be changed to $(MAKEFILES).
    	- Color space objects now must either be allocated with the
    gs_cspace_build_ procedures or initialized with the gs_cspace_init_
    procedures: building color spaces "by hand" is no longer allowed.

    (Library)
    	- There are new required elements of the gs_image_type_t structure.
    	- The binary and colored variants of gx_device_halftone have
    changed.  (No APIs are affected.)
    	- If a device changes its (effective) color mapping algorithm other
    than as a side effect of put_params, it must call
    gx_device_decache_colors(dev).

    Documentation

    Fixes problems:
    	- Some files still referred to .doc files rather than .htm.
    (gsiparam.h, imain.h)
    	- Version 5.50 was incorrectly identified as a beta version.
    (doc/News.htm)
    	- The instructions for cross-compilation were seriously
    incomplete.  (doc/Make.htm)

    Adds a text-only README file.  (doc/README)

    Updates the instructions for font compilation.  (doc/Fonts.htm)

    Updates the instructions for device and feature selection.  (doc/Make.htm)

    Adds material on 8.3 file names, compiler warning messages, and graphics
    library error codes to the C style guide.  (doc/C-style.htm)

    Adds a note about gx_device_decache_colors.  (doc/Drivers.htm)

    Improves formatting slightly.  (doc/Install.htm, doc/Use.htm)

    Procedures

    Fixes problems:
    	- The Unix install script referred to an obsolete ps2image.ps file.
    (unixinst.mak)
    	- The Unix CC script had some duplicated definitions.  (unix-cc.mak)
    	- The DVX makefile referred to int.mak in GLSRC rather than PSSRC.
    (dvx-gcc.mak)
    	- rollconv.ps wasn't installed with the other utilities.
    (unixinst.mak)
    	- Some definitions of MAKEFILE lacked a directory name.  (os2.mak,
    unix-cc.mak, unixansi.mak, watclib.mak)
    	- There were inappropriate dependencies on a file with the literal
    name `makefile'.  (bcwin32.mak, gs.mak, watc32.mak)
    	- Unix systems didn't use -fomit-frame-pointer when possible.
    (unix-cc.mak, unix-gcc.mak, unixansi.mak, unix-end.mak)

    Restructures the source files into multiple subdirectories:
    	src/ - files needed at build time: *.mak, *.h, *.c, *.cpp, *.icx, *.rc,
    		*.cmd, ??.bat, *.com, *.rps, *.dif, *.cfg
    	lib/ - files needed at run time: *_*.ps, *.ppd, *.upp, *.bat
    	doc/ - documentation other than man pages: *.htm, *.txt
    	man/ - man pages: *.1
    	examples/ - sample input data: *.ps, *.eps, *.pdf
    Also incorporates the font compilation makefile into the main makefile,
    since the former now depends on parameters defined in the latter.  (*.mak)

    ****** HAVEN'T SETTLED HOW TO HANDLE .ico FILES ******

    NOTE: Still need to update: openvms.mak, os2.mak.

    Updates the Unix install script for the directory split.  (unixinst.mak)

    Updates the font compilation makefile rules to handle alternate directories.
    (cfonts.mak, int.mak)

    ****** PROBLEM: cfonts.mak NEEDS CCFONT, BUT int.mak NEEDS CF* FOR ADDING
    ONE'S OWN FONTS ******

    Removes useless dependencies on gs_*.ps files.  (int.mak)

    Moves the .dev files into the GEN directories where they belong.  (gs.mak,
    dvx-tail.mak, msvclib.mak, openvms.mak, os2.mak, pcwin.mak, ugcclib.mak,
    unixhead.mak, unixtail.mak, unix-end.mak, watc.mak, watclib.mak, winlib.mak,
    echogs.c, genconf.c) ****** NO_OP FOR dvx HASN'T BEEN VERIFIED ******
    NOTE: Still to do:
    src/bcwin32.mak
    src/dvx-gcc.mak
    src/dvx-head.mak
    src/dvx-tail.mak
    src/msvc32.mak
    src/msvccmd.mak
    src/msvclib.mak
    src/msvctail.mak
    src/openvms.mak
    src/os2.mak
    src/pcwin.mak
    src/ugcclib.mak
    src/watc.mak
    src/watclib.mak
    src/watcw32.mak
    src/wccommon.mak
    src/wctail.mak
    src/winint.mak
    src/winlib.mak

    Adds a new BINDIR directory for the final executable (and associated files
    like resource files).  After building, only the contents of BINDIR and lib
    are needed for execution.  (gs.mak, unix-end.mak) ****** NEED TO DO
    openvms.mak, os2.mak, OTHER PC MAKEFILES ******

    Updates libpng to version 1.0.2.  (libpng.mak)

    Utilities

    Adds a new switch, -b, to echogs.  (echogs.c)

    Drivers

    Updates the PDF writer for the change in color space initialization.
    (gdevpdfi.c)

    Speeds up the pkmraw driver a bit more.  (gdevpbm.c)

    Updates some drivers to use the new CMYK color mapping procedures.
    (gdevpbm.c, gdevpcx.c, gdevxalt.c)

    Updates one driver that maintained its own color cache.  (gdevxalt.c)

    Removes some compiler warnings (mostly about "uninitialized" variables).
    (gdevpdfo.c, gdevpdft.c, gdevpx.c)

    Adds another driver for the H-P Color LaserJet 5/5M.  (gdevcljc.c)

    Platforms

    Fixes problems:
    	- A change in the MetroWerks C compiler caused the hypot function
    to become declared.  (math_.h)

    Interpreter

    Updates the compiled font code for updates in the type declarations.
    (iccfont.c, icfontab.c)

    Cleans up some more formatting and macros.  (ccfont.h, errors.h, icfontab.c,
    interp.c)

    Updates clients for the change in color space initialization.  (zcsdevn.c,
    zcsindex.c, zcspixel.c, zcssepr.c, zpcolor.c)

    Updates the memory validator for the addition of the large-block freelist.
    (ilocate.c)

    Interpreter (PDF)

    Fixes problems:
    	- If the final %%EOF was followed by any blanks before the newline,
    an error would occur.  (lib/pdf_main.ps)

    Streams

    Fixes problems:
    	- The LZWDecode filter wouldn't handle a file that had 4096-256-2+1
    data items before the reset.  (We think this is a bug in the file, but
    Acrobat accepts it.)  (slzwx.h, slzwd.c)

    Rearranges code slightly to improve readability.  (spdiff.c)

    Library

    Fixes problems:
    	- Changing the resolution (or any other parameter) of the bbox
    device from the command line caused an invalid memory access.  (gdevbbox.c)
    	- When banding, if the very first drawing operation involved a
    halftone with non-zero phase, an arithmetic exception occurred.
    (gxclpath.c)
    	- When banding, the X offset of the band was negated, producing
    incorrect output when placing multiple source pages on a single output page.
    (gxclread.c)
    	- When banding, rotated images crossing band boundaries produced
    incorrect output, because the subrectangle X value was inconsistent with the
    amount of data transmitted.  (gxclimag.c)
    	- When banding, the clipping check didn't take interpolation support
    into account.  (gxclimag.c)
    	- The clipping check for banding used (int) to take the floor of
    floating point values, which is wrong for negative values.  (gxclimag.c)
    	- The bounding box device didn't return an empty bounding
    rectangle if nothing had been written to it.  (gdevbbox.c)
    	- A value was conditional on a debugging switch even if DEBUG wasn't
    defined.  (gxcht.c)
    	- Filling a region with a large colored halftone, a non-default
    RasterOp, and a non-null RasterOp source could cause only part of the region
    to be filled.  (gxcht.c) ****** NOT FIXED YET ******
    	- Type 1 fonts that used very large numbers (>= 2^19) caused a
    rangecheck.  We've fixed this for the only case that seems to matter, namely
    <very-large-number> <number> div.  (gxtype1.h, gstype1.c)
    	- The memory-based band list allocator failed to return an error
    code from memfile_next_blk.  (gxclmem.c)
    	- When recovering from a low-band-list-memory condition while
    writing an image, the record of the current image enumeration
    (cdev->image_enum_id) wasn't updated.  (gxclimag.c)
    	- The estimated memory requirement for the band list rasterizer was
    too small.  (gdevprna.c)

    Adds some tracing to mask clipping.  (gxclipm.c)

    Speeds up masked images by doing mask clipping before halftoning, using a
    more efficient mask scanning algorithm, and checking for vertical blocks of
    1s.  (gxclipm.c)

    Speeds up ImageType 4 images greatly by incorporating the color-key check
    into the ImageType 1 rendering code.  NOTE: the 12-bit case has not been
    tested.  (gxcpath.h, gximage.h, gxi12bit.c, gxicolor.c, gxifast.c,
    gxiinit.c, gximage4.c, gximono.c, gxiscale.c)

    Implements passing ImageType 4 images (and potentially others) through the
    band list.  This involves adding image parameter writing and reading
    procedures to the image type structure.  (gscdefs.h, gsiparam.h, gsiparm2.h,
    gsiparm4.h, gsmatrix.h, gxclpath.h, gxiparam.h, gconf.c, genconf.c,
    gsmatrix.c, gxclimag.c, gxclist.c, gxclpath.c, gxclrast.c, gxiinit.c,
    gximage2.c, gximage3.c, gximage4.c)

    Splits off the generic image support code from the ImageType 1 code.
    (gxiinit.c [deleted], gximage.c, gximage1.c, gxipixel.c)

    Removes some vestiges of support for 16-bit environments.  (gsmisc.c)

    Implements bit-planar images, important for PCL interpretation.
    (gsiparam.h, gximage.h, gxiparam.h, gdevddrw.c, gdevpdfi.c, gdevps.c,
    gsimage.c, gxclimag.c, gxidata.c, gximage.c, gxipixel.c) ****** NOT TESTED
    YET ******

    Makes closing a memory device that owns its bitmap set the bitmap pointer to
    0, for the sake of an application that doesn't handle is_open properly.
    (gdevmem.c)

    Speeds up floating-point emulation for single-precision add, subtract, and
    multiply.  (gsfemu.c)

    Speeds up sampling of transfer functions.  (gshtx.c)

    Makes the CIE cache used fixed-point values if the CPU has slow floating
    point.  (gscie.h)

    Adds a unique ID to color spaces to allow fast detection of reselecting the
    same color space.  This matters for certain client code that repeatedly
    reselects the same color space, since selecting certain color spaces is
    expensive.  (gscpixel.h, gscspace.h, gxcspace.h, gscolor2.c, gscpixel.c,
    gscscie.c, gscspace.c, gspcolor.c, gsstate.c, gximage2.c) ****** NEED TO FIX
    gxclrast.c TO ALLOC INDEXED COLOR SPACE ******

    Speeds up setting Pattern color spaces, by bypassing the install code for
    the base space.  (gspcolor.c)

    Adds a unique ID to CRDs to allow fast detection of reselecting the same
    CRD.  This matters for certain client code that does this repeatedly.
    (gscie.h, gscrd.h, gscrd.c)

    Detects setting the CRD to one with identical PQR components, and bypasses
    an expensive setup step.  (gscie.c)

    Speeds up converting pixels between representations (gx_get_bits_copy) for
    devices with up to 4 bits per pixel, by caching the pixel values.
    (gdevdgbr.c)

    Speeds up the slow default RasterOp algorithm a little.  (gdevdrop.c)

    Defines standard mapping procedures for 1-bit-per-component CMYK colors.
    Other code can then test for the presence of these procedures and use more
    efficient algorithms.  (gxdevice.h, gxcmap.c)

    Speeds up some algorithms in the bbox device by making some recursive calls
    use a pure color rather than a client-supplied one.  (gdevbbox.h, gdevbbox.c)

    Adds a cache for the black and white pixel values to the device structure.
    (gxdevcli.h, gxdevice.h, gdevalph.c, gdevnfwd.c, gsdparam.c, gxdcolor.c)

    Makes the code for colored halftones a little more readable.  (gxcht.c)

    Speeds up color mapping for CMYK devices by copying the color mapping
    procedures into forwarding devices, when applicable.  (gdevcmap.c,
    gdevmem.c, gsdevice.c, gxclip.c)

    Removes some compiler warnings (mostly about "uninitialized" variables).
    (gxcldev.h, gsdevmem.c, gsshade.c, gstype42.c, gxclpath.c, gxfill.c,
    gximage3.c, gxpath2.c, gxpcopy.c)

    For the benefit of certain client code that commonly sets a CRD and then
    doesn't use it, makes loading of the joint CIE caches lazy (at the library
    level).  (gscie.h, gscie.c)

    Changes CIE color restriction from a macro to a procedure, since it is
    rarely used.  (gscie.c)

    Adds code and structures for detecting when CIE Decode and/or Encode
    procedures are simply linear transformations, which would allow collapsing
    them into the adjacent matrix, but doesn't actually do the collapsing.
    (gscie.h, gscie.c)

    Speeds up color halftoning by pre-computing the mask of planes that need to
    be halftoned, and preconverting multi-plane halftones to binary or solid
    colors when possible.  (gsdcolor.h, gxcht.c, gxdcolor.c, gxdither.c, gxht.c)

    Optimizes color mapping for 1-bit-per-component CMYK halftones.  (gxcht.c)

    Optimizes null RasterOp sources for black = 1 as well as black = 0.
    (gxdcolor.c)

    Modifies the standard allocator so it keeps track of large free blocks as
    well as small ones, and uses them to satisfy requests when appropriate.
    (gxalloc.h, gsalloc.c)

    Speeds up the horizontal bitmap replication code a bit.  (Much more is
    possible.)  (gsbitops.c)

    Changes gs_image_max_planes to gs_image_max_components to reflect its
    function more accurately.  (gdevddrw.c)

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Ghostscript version 6.0, 3 February 2000