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# qpaintdevice.h

This is the verbatim text of the qpaintdevice.h include file. It is provided only for illustration; the copyright remains with Trolltech.

    /****************************************************************************
    ** $Id:  qt/qpaintdevice.h   3.1.0-b1   edited Apr 24 00:55 $
    **
    ** Definition of QPaintDevice class
    **
    ** Created : 940721
    **
    ** Copyright (C) 1992-2000 Trolltech AS.  All rights reserved.
    **
    ** This file is part of the kernel module of the Qt GUI Toolkit.
    **
    ** This file may be distributed under the terms of the Q Public License
    ** as defined by Trolltech AS of Norway and appearing in the file
    ** LICENSE.QPL included in the packaging of this file.
    **
    ** This file may be distributed and/or modified under the terms of the
    ** GNU General Public License version 2 as published by the Free Software
    ** Foundation and appearing in the file LICENSE.GPL included in the
    ** packaging of this file.
    **
    ** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
    ** licenses may use this file in accordance with the Qt Commercial License
    ** Agreement provided with the Software.
    **
    ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
    ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
    **
    ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
    **   information about Qt Commercial License Agreements.
    ** See http://www.trolltech.com/qpl/ for QPL licensing information.
    ** See http://www.trolltech.com/gpl/ for GPL licensing information.
    **
    ** Contact info@trolltech.com if any conditions of this licensing are
    ** not clear to you.
    **
    **********************************************************************/

    #ifndef QPAINTDEVICE_H
    #define QPAINTDEVICE_H

    #ifndef QT_H
    #include "qwindowdefs.h"
    #include "qrect.h"
    #endif // QT_H

    #if defined(Q_WS_QWS)
    class QWSDisplay;
    class QGfx;
    #endif

    class QIODevice;
    class QString;

    #if defined(Q_WS_X11)
    struct QPaintDeviceX11Data;
    #endif

    union QPDevCmdParam {
        int			 ival;
        int			*ivec;
        QString	        *str;
        const QPoint	*point;
        const QRect		*rect;
        const QPointArray	*ptarr;
        const QPixmap	*pixmap;
        const QImage	*image;
        const QColor	*color;
        const QFont		*font;
        const QPen		*pen;
        const QBrush	*brush;
        const QRegion	*rgn;
        const QWMatrix	*matrix;
        QIODevice		*device;
    };

    class Q_EXPORT QPaintDevice				// device for QPainter
    {
    public:
        virtual ~QPaintDevice();

        int		devType() const;
        bool	isExtDev() const;
        bool	paintingActive() const;

        virtual void setResolution( int );
        virtual int resolution() const;

        // Windows:	  get device context
        // X-Windows: get drawable
    #if defined(Q_WS_WIN)
        virtual HDC		handle() const;
    #elif defined(Q_WS_X11)
        virtual Qt::HANDLE	handle() const;
        virtual Qt::HANDLE  x11RenderHandle() const;
    #elif defined(Q_WS_MAC)
        virtual Qt::HANDLE      handle() const;
    #elif defined(Q_WS_QWS)
        virtual Qt::HANDLE	handle() const;
    #endif

    #if defined(Q_WS_X11)
        Display 	   *x11Display() const;
        int		    x11Screen() const;
        int		    x11Depth() const;
        int		    x11Cells() const;
        Qt::HANDLE	    x11Colormap() const;
        bool	    x11DefaultColormap() const;
        void	   *x11Visual() const;
        bool	    x11DefaultVisual() const;

        static Display *x11AppDisplay();
        static int	    x11AppScreen();

        static int      x11AppDpiX();
        static int      x11AppDpiY();
        static void     x11SetAppDpiX(int);
        static void     x11SetAppDpiY(int);
        static int	    x11AppDepth();
        static int	    x11AppCells();
        static Qt::HANDLE   x11AppRootWindow();
        static Qt::HANDLE   x11AppColormap();
        static bool     x11AppDefaultColormap();
        static void    *x11AppVisual();
        static bool	    x11AppDefaultVisual();

        // ### in 4.0, the above need to go away, the below needs to take a -1 default
        // argument, signifying the default screen...
        static int	    x11AppDepth( int screen );
        static int	    x11AppCells( int screen );
        static Qt::HANDLE   x11AppRootWindow( int screen );
        static Qt::HANDLE   x11AppColormap( int screen );
        static void    *x11AppVisual( int screen );
        static bool     x11AppDefaultColormap( int screen );
        static bool	    x11AppDefaultVisual( int screen );
        static int      x11AppDpiX( int );
        static int      x11AppDpiY( int );
        static void     x11SetAppDpiX( int, int );
        static void     x11SetAppDpiY( int, int );
    #endif

    #if defined(Q_WS_QWS)
        static QWSDisplay *qwsDisplay();
        virtual unsigned char * scanLine(int) const;
        virtual int bytesPerLine() const;
        virtual QGfx * graphicsContext(bool clip_children=TRUE) const;
    #endif

        enum PDevCmd {
    	PdcNOP = 0, //  <void>
    	PdcDrawPoint = 1, // point
    	PdcDrawFirst = PdcDrawPoint,
    	PdcMoveTo = 2, // point
    	PdcLineTo = 3, // point
    	PdcDrawLine = 4, // point,point
    	PdcDrawRect = 5, // rect
    	PdcDrawRoundRect = 6, // rect,ival,ival
    	PdcDrawEllipse = 7, // rect
    	PdcDrawArc = 8, // rect,ival,ival
    	PdcDrawPie = 9, // rect,ival,ival
    	PdcDrawChord = 10, // rect,ival,ival
    	PdcDrawLineSegments = 11, // ptarr
    	PdcDrawPolyline = 12, // ptarr
    	PdcDrawPolygon = 13, // ptarr,ival
    	PdcDrawCubicBezier = 14, // ptarr
    	PdcDrawText = 15, // point,str
    	PdcDrawTextFormatted = 16, // rect,ival,str
    	PdcDrawPixmap = 17, // rect,pixmap
    	PdcDrawImage = 18, // rect,image
    	PdcDrawText2 = 19, // point,str
    	PdcDrawText2Formatted = 20, // rect,ival,str
    	PdcDrawLast = PdcDrawText2Formatted,

    	// no painting commands below PdcDrawLast.

    	PdcBegin = 30, //  <void>
    	PdcEnd = 31, //  <void>
    	PdcSave = 32, //  <void>
    	PdcRestore = 33, //  <void>
    	PdcSetdev = 34, // device - PRIVATE
    	PdcSetBkColor = 40, // color
    	PdcSetBkMode = 41, // ival
    	PdcSetROP = 42, // ival
    	PdcSetBrushOrigin = 43, // point
    	PdcSetFont = 45, // font
    	PdcSetPen = 46, // pen
    	PdcSetBrush = 47, // brush
    	PdcSetTabStops = 48, // ival
    	PdcSetTabArray = 49, // ival,ivec
    	PdcSetUnit = 50, // ival
    	PdcSetVXform = 51, // ival
    	PdcSetWindow = 52, // rect
    	PdcSetViewport = 53, // rect
    	PdcSetWXform = 54, // ival
    	PdcSetWMatrix = 55, // matrix,ival
    	PdcSaveWMatrix = 56,
    	PdcRestoreWMatrix = 57,
    	PdcSetClip = 60, // ival
    	PdcSetClipRegion = 61, // rgn

    	PdcReservedStart = 0, // codes 0-199 are reserved
    	PdcReservedStop = 199 //   for Qt
        };

    protected:
        QPaintDevice( uint devflags );

    #if defined(Q_WS_WIN)
        HDC		hdc;				// device context
    #elif defined(Q_WS_X11)
        Qt::HANDLE	hd;				// handle to drawable
        Qt::HANDLE  rendhd;                         // handle to RENDER pict

        void		 copyX11Data( const QPaintDevice * );
        void		 cloneX11Data( const QPaintDevice * );
        virtual void	 setX11Data( const QPaintDeviceX11Data* );
        QPaintDeviceX11Data* getX11Data( bool def=FALSE ) const;
    #elif defined(Q_WS_MAC)
    #if !defined( QMAC_NO_QUARTZ )
        CGContextRef ctx;
    #endif
        void * hd;
    #elif defined(Q_WS_QWS)
        Qt::HANDLE hd;
    #endif

        virtual bool cmd( int, QPainter *, QPDevCmdParam * );
        virtual int	 metric( int ) const;
        virtual int	 fontMet( QFont *, int, const char * = 0, int = 0 ) const;
        virtual int	 fontInf( QFont *, int ) const;

        ushort	devFlags;			// device flags
        ushort	painters;			// refcount

        friend class QPainter;
        friend class QPaintDeviceMetrics;
    #if defined(Q_WS_MAC)
    #ifndef QMAC_NO_QUARTZ
        virtual CGContextRef macCGContext(bool clipped=TRUE) const;
    #endif
        friend Q_EXPORT void unclippedScaledBitBlt( QPaintDevice *, int, int, int, int,
    						const QPaintDevice *, int, int, int, int, Qt::RasterOp, bool, bool );
    #else
        friend Q_EXPORT void bitBlt( QPaintDevice *, int, int,
    				 const QPaintDevice *,
    				 int, int, int, int, Qt::RasterOp, bool );
    #endif
    #if defined(Q_WS_X11)
        friend void qt_init_internal( int *, char **, Display *, Qt::HANDLE, Qt::HANDLE );
        friend void qt_cleanup();
    #endif

    private:
    #if defined(Q_WS_X11)
        static Display *x_appdisplay;
        static int	    x_appscreen;

        static int	    x_appdepth;
        static int	    x_appcells;
        static Qt::HANDLE   x_approotwindow;
        static Qt::HANDLE   x_appcolormap;
        static bool	    x_appdefcolormap;
        static void	   *x_appvisual;
        static bool     x_appdefvisual;

        // ### in 4.0, remove the above, and replace with the below
        static int	      *x_appdepth_arr;
        static int	      *x_appcells_arr;
        static Qt::HANDLE *x_approotwindow_arr;
        static Qt::HANDLE *x_appcolormap_arr;
        static bool	      *x_appdefcolormap_arr;
        static void	     **x_appvisual_arr;
        static bool       *x_appdefvisual_arr;

        QPaintDeviceX11Data* x11Data;
    #endif

    private:	// Disabled copy constructor and operator=
    #if defined(Q_DISABLE_COPY)
        QPaintDevice( const QPaintDevice & );
        QPaintDevice &operator=( const QPaintDevice & );
    #endif
    };

    Q_EXPORT
    void bitBlt( QPaintDevice *dst, int dx, int dy,
    	     const QPaintDevice *src, int sx=0, int sy=0, int sw=-1, int sh=-1,
    	     Qt::RasterOp = Qt::CopyROP, bool ignoreMask=FALSE );

    Q_EXPORT
    void bitBlt( QPaintDevice *dst, int dx, int dy,
    	     const QImage *src, int sx=0, int sy=0, int sw=-1, int sh=-1,
    	     int conversion_flags=0 );

    #if defined(Q_WS_X11)

    struct Q_EXPORT QPaintDeviceX11Data : public QShared {
        Display*	x_display;
        int		x_screen;
        int		x_depth;
        int		x_cells;
        Qt::HANDLE	x_colormap;
        bool	x_defcolormap;
        void*	x_visual;
        bool	x_defvisual;
    };

    #endif

    /*****************************************************************************
      Inline functions
     *****************************************************************************/

    inline int QPaintDevice::devType() const
    { return devFlags & QInternal::DeviceTypeMask; }

    inline bool QPaintDevice::isExtDev() const
    { return (devFlags & QInternal::ExternalDevice) != 0; }

    inline bool QPaintDevice::paintingActive() const
    { return painters != 0; }

    #if defined(Q_WS_X11)
    inline Display *QPaintDevice::x11Display() const
    { return x11Data ? x11Data->x_display : x_appdisplay; }

    inline int QPaintDevice::x11Screen() const
    { return x11Data ? x11Data->x_screen : x_appscreen; }

    inline int QPaintDevice::x11Depth() const
    { return x11Data ? x11Data->x_depth : x_appdepth; }

    inline int QPaintDevice::x11Cells() const
    { return x11Data ? x11Data->x_cells : x_appcells; }

    inline Qt::HANDLE QPaintDevice::x11Colormap() const
    { return x11Data ? x11Data->x_colormap : x_appcolormap; }

    inline bool QPaintDevice::x11DefaultColormap() const
    { return x11Data ? x11Data->x_defcolormap : x_appdefcolormap; }

    inline void *QPaintDevice::x11Visual() const
    { return x11Data ? x11Data->x_visual : x_appvisual; }

    inline bool QPaintDevice::x11DefaultVisual() const
    { return x11Data ? x11Data->x_defvisual : x_appdefvisual; }

    inline Display *QPaintDevice::x11AppDisplay()
    { return x_appdisplay; }

    inline int QPaintDevice::x11AppScreen()
    { return x_appscreen; }

    inline int QPaintDevice::x11AppDepth( int screen )
    { return x_appdepth_arr[ screen == -1 ? x_appscreen : screen ]; }

    inline int QPaintDevice::x11AppCells( int screen )
    { return x_appcells_arr[ screen == -1 ? x_appscreen : screen ]; }

    inline Qt::HANDLE QPaintDevice::x11AppRootWindow( int screen )
    { return x_approotwindow_arr[ screen == -1 ? x_appscreen : screen ]; }

    inline Qt::HANDLE QPaintDevice::x11AppColormap( int screen )
    { return x_appcolormap_arr[ screen == -1 ? x_appscreen : screen ]; }

    inline bool QPaintDevice::x11AppDefaultColormap( int screen )
    { return x_appdefcolormap_arr[ screen == -1 ? x_appscreen : screen ]; }

    inline void *QPaintDevice::x11AppVisual( int screen )
    { return x_appvisual_arr[ screen == -1 ? x_appscreen : screen ]; }

    inline bool QPaintDevice::x11AppDefaultVisual( int screen )
    { return x_appdefvisual_arr[ screen == -1 ? x_appscreen : screen ]; }

    inline int QPaintDevice::x11AppDepth()
    { return x_appdepth; }

    inline int QPaintDevice::x11AppCells()
    { return x_appcells; }

    inline Qt::HANDLE QPaintDevice::x11AppRootWindow()
    { return x_approotwindow; }

    inline Qt::HANDLE QPaintDevice::x11AppColormap()
    { return x_appcolormap; }

    inline bool QPaintDevice::x11AppDefaultColormap()
    { return x_appdefcolormap; }

    inline void *QPaintDevice::x11AppVisual()
    { return x_appvisual; }

    inline bool QPaintDevice::x11AppDefaultVisual()
    { return x_appdefvisual; }

    #endif // Q_WS_X11

    Q_EXPORT
    inline void bitBlt( QPaintDevice *dst, const QPoint &dp,
    		    const QPaintDevice *src, const QRect &sr =QRect(0,0,-1,-1),
    		    Qt::RasterOp rop=Qt::CopyROP, bool ignoreMask=FALSE )
    {
        bitBlt( dst, dp.x(), dp.y(), src, sr.x(), sr.y(), sr.width(), sr.height(),
    	    rop, ignoreMask );
    }

    #endif // QPAINTDEVICE_H