Class DIBImageReader

java.lang.Object

javax.imageio.ImageReader

com.twelvemonkeys.imageio.ImageReaderBase

com.twelvemonkeys.imageio.plugins.bmp.DIBImageReader

Direct Known Subclasses:

CURImageReader, ICOImageReader

abstract class DIBImageReader
extends ImageReaderBase

ImageReader for Microsoft Windows ICO (icon) format. 1, 4, 8 bit palette support with bitmask transparency, and 16, 24 and 32 bit true color support with alpha. Also supports Windows Vista PNG encoded icons.

Version:

$Id: ICOImageReader.java,v 1.0 25.feb.2006 00:29:44 haku Exp$

See Also:

• BMP file format (Wikipedia)
• ICO file format (Wikipedia)

Field Summary

Fields

Modifier and Type	Field	Description
private final Map<DirectoryEntry, BitmapDescriptor>	descriptors
private Directory	directory
private final Map<DirectoryEntry, DIBHeader>	headers
private ImageReader	pngImageReader

Fields inherited from class ImageReaderBase

imageInput

Fields inherited from class ImageReader

availableLocales, ignoreMetadata, input, locale, minIndex, originatingProvider, progressListeners, seekForwardOnly, updateListeners, warningListeners, warningLocales

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	DIBImageReader(ImageReaderSpi provider)

Method Summary

Modifier and Type	Method	Description
private static void	addImage(Container parent, ImageReader reader, int imageNo)
private static int	adjustToPadding(int width)
private static JFrame	createWindow(String title)
private Directory	getDirectory()
(package private) final DirectoryEntry	getEntry(int imageIndex)
private DIBHeader	getHeader(DirectoryEntry entry)
int	getHeight(int imageIndex)
Iterator<ImageTypeSpecifier>	getImageTypes(int imageIndex)
private Iterator<ImageTypeSpecifier>	getImageTypesPNG(DirectoryEntry entry)
int	getNumImages(boolean allowSearch)	Default implementation that always returns 1.
private ImageReader	getPNGReader()
int	getWidth(int imageIndex)
private ImageReader	initPNGReader(DirectoryEntry entry)
private boolean	isPNG(DirectoryEntry entry)
static void	main(String[] args)	Test code below, ignore..
BufferedImage	read(int imageIndex, ImageReadParam param)
private BufferedImage	readBitmap(DirectoryEntry entry)
private void	readBitmap16(BitmapDescriptor bitmap)
private void	readBitmap24(BitmapDescriptor bitmap)
private void	readBitmap32(BitmapDescriptor bitmap)
private void	readBitmapIndexed(BitmapIndexed bitmap)
private void	readBitmapIndexed1(BitmapIndexed bitmap, boolean asMask)
private void	readBitmapIndexed4(BitmapIndexed bitmap)
private void	readBitmapIndexed8(BitmapIndexed bitmap)
private void	readColorMap(BitmapIndexed bitmap)
private void	readFileHeader()
private static void	readImagesInFile(String fileName, ImageReader reader, Container container)
private BufferedImage	readPNG(DirectoryEntry entry, ImageReadParam param)
protected void	resetMembers()	Resets all member variables.

Methods inherited from class ImageReaderBase

assertInput, checkBounds, dispose, fakeAOI, fakeSubsampling, getDestination, getImageMetadata, getStreamMetadata, hasExplicitDestination, reset, setInput, showIt

Methods inherited from class ImageReader

abort, abortRequested, addIIOReadProgressListener, addIIOReadUpdateListener, addIIOReadWarningListener, canReadRaster, checkReadParamBandSettings, clearAbortRequest, computeRegions, getAspectRatio, getAvailableLocales, getDefaultReadParam, getFormatName, getImageMetadata, getInput, getLocale, getMinIndex, getNumThumbnails, getOriginatingProvider, getRawImageType, getSourceRegion, getStreamMetadata, getThumbnailHeight, getThumbnailWidth, getTileGridXOffset, getTileGridYOffset, getTileHeight, getTileWidth, hasThumbnails, isIgnoringMetadata, isImageTiled, isRandomAccessEasy, isSeekForwardOnly, processImageComplete, processImageProgress, processImageStarted, processImageUpdate, processPassComplete, processPassStarted, processReadAborted, processSequenceComplete, processSequenceStarted, processThumbnailComplete, processThumbnailPassComplete, processThumbnailPassStarted, processThumbnailProgress, processThumbnailStarted, processThumbnailUpdate, processWarningOccurred, processWarningOccurred, read, readAll, readAll, readAsRenderedImage, readerSupportsThumbnails, readRaster, readThumbnail, readTile, readTileRaster, removeAllIIOReadProgressListeners, removeAllIIOReadUpdateListeners, removeAllIIOReadWarningListeners, removeIIOReadProgressListener, removeIIOReadUpdateListener, removeIIOReadWarningListener, setInput, setInput, setLocale

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

directory

private Directory directory

headers

private final Map<DirectoryEntry, DIBHeader> headers

descriptors

private final Map<DirectoryEntry, BitmapDescriptor> descriptors

pngImageReader

private ImageReader pngImageReader

Constructor Details

DIBImageReader

protected DIBImageReader(ImageReaderSpi provider)

Method Details

resetMembers

protected void resetMembers()

Description copied from class: ImageReaderBase

Resets all member variables. This method is by default invoked from:

• ImageReaderBase.setInput(Object, boolean, boolean)
• ImageReaderBase.dispose()
• ImageReaderBase.reset()

Specified by:

resetMembers in class ImageReaderBase

getImageTypes

public Iterator<ImageTypeSpecifier> getImageTypes(int imageIndex)
                                           throws IOException

Specified by:

getImageTypes in class ImageReader

Throws:

IOException

getNumImages

public int getNumImages(boolean allowSearch)
                 throws IOException

Description copied from class: ImageReaderBase

Default implementation that always returns 1.

Overrides:

getNumImages in class ImageReaderBase

Parameters:

allowSearch - ignored, unless overridden

Returns:

1, unless overridden

Throws:

IOException - never, unless overridden

getWidth

public int getWidth(int imageIndex)
             throws IOException

Specified by:

getWidth in class ImageReader

Throws:

IOException

getHeight

public int getHeight(int imageIndex)
              throws IOException

Specified by:

getHeight in class ImageReader

Throws:

IOException

read

public BufferedImage read(int imageIndex,
 ImageReadParam param)
                   throws IOException

Specified by:

read in class ImageReader

Throws:

IOException

isPNG

private boolean isPNG(DirectoryEntry entry)
               throws IOException

Throws:

IOException

readPNG

private BufferedImage readPNG(DirectoryEntry entry,
 ImageReadParam param)
                       throws IOException

Throws:

IOException

getImageTypesPNG

private Iterator<ImageTypeSpecifier> getImageTypesPNG(DirectoryEntry entry)
                                               throws IOException

Throws:

IOException

initPNGReader

private ImageReader initPNGReader(DirectoryEntry entry)
                           throws IOException

Throws:

IOException

getPNGReader

private ImageReader getPNGReader()
                          throws IIOException

Throws:

IIOException

getHeader

private DIBHeader getHeader(DirectoryEntry entry)
                     throws IOException

Throws:

IOException

readBitmap

private BufferedImage readBitmap(DirectoryEntry entry)
                          throws IOException

Throws:

IOException

readBitmapIndexed

private void readBitmapIndexed(BitmapIndexed bitmap)
                        throws IOException

Throws:

IOException

readColorMap

private void readColorMap(BitmapIndexed bitmap)
                   throws IOException

Throws:

IOException

readBitmapIndexed1

private void readBitmapIndexed1(BitmapIndexed bitmap,
 boolean asMask)
                         throws IOException

Throws:

IOException

readBitmapIndexed4

private void readBitmapIndexed4(BitmapIndexed bitmap)
                         throws IOException

Throws:

IOException

readBitmapIndexed8

private void readBitmapIndexed8(BitmapIndexed bitmap)
                         throws IOException

Throws:

IOException

adjustToPadding

private static int adjustToPadding(int width)

Parameters:

width - Bytes per scan line (i.e., 1BPP, width = 9 -> bytes = 2)

Returns:

padded width

readBitmap16

private void readBitmap16(BitmapDescriptor bitmap)
                   throws IOException

Throws:

IOException

readBitmap24

private void readBitmap24(BitmapDescriptor bitmap)
                   throws IOException

Throws:

IOException

readBitmap32

private void readBitmap32(BitmapDescriptor bitmap)
                   throws IOException

Throws:

IOException

getDirectory

private Directory getDirectory()
                        throws IOException

Throws:

IOException

readFileHeader

private void readFileHeader()
                     throws IOException

Throws:

IOException

getEntry

final DirectoryEntry getEntry(int imageIndex)
                       throws IOException

Throws:

IOException

main

public static void main(String[] args)
                 throws IOException

Test code below, ignore.. :-)

Throws:

IOException

readImagesInFile

private static void readImagesInFile(String fileName,
 ImageReader reader,
 Container container)
                              throws IOException

Throws:

IOException

createWindow

private static JFrame createWindow(String title)

addImage

private static void addImage(Container parent,
 ImageReader reader,
 int imageNo)
                      throws IOException

Throws:

IOException