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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/src/kernel/qpaintdevice.h   2.3.1   edited 2001-01-26 $
    **
    ** 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(_WS_QWS_)
    class QWSDisplay;
    class QGfx;
    #endif

    class QIODevice;
    class QString;

    #if defined(_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;

        // Windows:   get device context
        // X-Windows: get drawable
    #if defined(_WS_WIN_)
        HDC         handle() const;
    #elif defined(_WS_X11_)
        HANDLE      handle() const;
    #elif defined(_WS_MAC_)
        HANDLE      handle() const;
    #elif defined(_WS_QWS_)
        HANDLE      handle() const;
    #endif

    #if defined(_WS_X11_)
        Display        *x11Display() const;
        int             x11Screen() const;
        int             x11Depth() const;
        int             x11Cells() const;
        HANDLE          x11Colormap() const;
        bool            x11DefaultColormap() const;
        void           *x11Visual() const;
        bool            x11DefaultVisual() const;

        static Display *x11AppDisplay();
        static int      x11AppScreen();
        static int      x11AppDepth();
        static int      x11AppCells();
        static int      x11AppDpiX();
        static int      x11AppDpiY();
        static HANDLE   x11AppColormap();
        static bool     x11AppDefaultColormap();
        static void    *x11AppVisual();
        static bool     x11AppDefaultVisual();
        static void     x11SetAppDpiX(int);
        static void     x11SetAppDpiY(int);
    #endif

    #if defined(_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
            PdcDrawQuadBezier = 14, // ptarr
            PdcDrawText = 15, // point,str
            PdcDrawTextFormatted = 16, // rect,ival,str
            PdcDrawPixmap = 17, // point,pixmap
            PdcDrawImage = 18, // point,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(_WS_WIN_)
        HDC         hdc;                            // device context
    #elif defined(_WS_X11_)
        HANDLE      hd;                             // handle to drawable
        void                 copyX11Data( const QPaintDevice * );
        virtual void         setX11Data( const QPaintDeviceX11Data* );
        QPaintDeviceX11Data* getX11Data( bool def=FALSE ) const;
    #elif defined(_WS_MAC_)
        void * hd;
        virtual void fixport();
    #elif defined(_WS_QWS_)
        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;
        friend Q_EXPORT void bitBlt( QPaintDevice *, int, int,
                                     const QPaintDevice *,
                                     int, int, int, int, Qt::RasterOp, bool );
    #if defined(_WS_X11_)
        friend void qt_init_internal( int *, char **, Display * );
    #endif

    private:
    #if defined(_WS_X11_)
        static Display *x_appdisplay;
        static int      x_appscreen;
        static int      x_appdepth;
        static int      x_appcells;
        static HANDLE   x_appcolormap;
        static bool     x_appdefcolormap;
        static void    *x_appvisual;
        static bool     x_appdefvisual;

        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(_WS_X11_)

    struct Q_EXPORT QPaintDeviceX11Data {
        Display*    x_display;
        int         x_screen;
        int         x_depth;
        int         x_cells;
        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(_WS_WIN_)
    inline HDC    QPaintDevice::handle() const { return hdc; }
    #elif defined(_WS_X11_)
    inline HANDLE QPaintDevice::handle() const { return hd; }
    #endif

    #if defined(_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 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()
    { return x_appdepth; }

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

    inline 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 // _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