qgfx_qws.h
This is the verbatim text of the qgfx_qws.h include file. It is provided only for illustration; the copyright remains with Trolltech.
/****************************************************************************
** $Id: qt/qgfx_qws.h 3.3.8 edited Jan 11 14:38 $
**
** Definition of QGfx (graphics context) class
**
** Created : 940721
**
** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
**
** This file is part of the kernel module of the Qt GUI Toolkit.
**
** This file may be used under the terms of the GNU General Public
** License versions 2.0 or 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Alternatively you may (at your option) use any
** later version of the GNU General Public License if such license has
** been publicly approved by Trolltech ASA (or its successors, if any)
** and the KDE Free Qt Foundation.
**
** Please review the following information to ensure GNU General
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** If you are unsure which license is appropriate for your use, please
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**********************************************************************/
#ifndef QGFX_QWS_H
#define QGFX_QWS_H
#ifndef QT_H
#include "qwidget.h"
#include "qnamespace.h"
#include "qimage.h"
#include "qfontmanager_qws.h"
#include "qmemorymanager_qws.h"
#include "qpoint.h"
#endif // QT_H
#include <private/qtextengine_p.h>
class QScreenCursor;
#if !defined( QT_NO_IMAGE_16_BIT ) || !defined( QT_NO_QWS_DEPTH_16 )
# ifndef QT_QWS_DEPTH16_RGB
# define QT_QWS_DEPTH16_RGB 565
# endif
static const int qt_rbits = (QT_QWS_DEPTH16_RGB/100);
static const int qt_gbits = (QT_QWS_DEPTH16_RGB/10%10);
static const int qt_bbits = (QT_QWS_DEPTH16_RGB%10);
static const int qt_red_shift = qt_bbits+qt_gbits-(8-qt_rbits);
static const int qt_green_shift = qt_bbits-(8-qt_gbits);
static const int qt_neg_blue_shift = 8-qt_bbits;
static const int qt_blue_mask = (1<<qt_bbits)-1;
static const int qt_green_mask = (1<<(qt_gbits+qt_bbits))-((1<<qt_bbits)-1);
static const int qt_red_mask = (1<<(qt_rbits+qt_gbits+qt_bbits))-(1<<(qt_gbits+qt_bbits));
inline ushort qt_convRgbTo16( const int r, const int g, const int b )
{
const int tr = r << qt_red_shift;
const int tg = g << qt_green_shift;
const int tb = b >> qt_neg_blue_shift;
return (tb & qt_blue_mask) | (tg & qt_green_mask) | (tr & qt_red_mask);
}
inline ushort qt_convRgbTo16( QRgb c )
{
const int tr = qRed(c) << qt_red_shift;
const int tg = qGreen(c) << qt_green_shift;
const int tb = qBlue(c) >> qt_neg_blue_shift;
return (tb & qt_blue_mask) | (tg & qt_green_mask) | (tr & qt_red_mask);
}
inline QRgb qt_conv16ToRgb( ushort c )
{
const int r=(c & qt_red_mask);
const int g=(c & qt_green_mask);
const int b=(c & qt_blue_mask);
const int tr = r >> qt_red_shift;
const int tg = g >> qt_green_shift;
const int tb = b << qt_neg_blue_shift;
return qRgb(tr,tg,tb);
}
inline void qt_conv16ToRgb( ushort c, int& r, int& g, int& b )
{
const int tr=(c & qt_red_mask);
const int tg=(c & qt_green_mask);
const int tb=(c & qt_blue_mask);
r = tr >> qt_red_shift;
g = tg >> qt_green_shift;
b = tb << qt_neg_blue_shift;
}
#endif
const int SourceSolid=0;
const int SourcePixmap=1;
#ifndef QT_NO_QWS_CURSOR
extern bool qt_sw_cursor;
class QGfxRasterBase;
#define SW_CURSOR_DATA_SIZE 4096 // 64x64 8-bit cursor
struct SWCursorData {
unsigned char cursor[SW_CURSOR_DATA_SIZE];
unsigned char under[SW_CURSOR_DATA_SIZE*4]; // room for 32bpp display
QRgb clut[256];
unsigned char translut[256];
int colors;
int width;
int height;
int x;
int y;
int hotx;
int hoty;
bool enable;
QRect bound;
};
class QScreenCursor
{
public:
QScreenCursor( );
virtual ~QScreenCursor();
virtual void init(SWCursorData *da, bool init = FALSE);
virtual void set( const QImage &image, int hotx, int hoty );
virtual void move( int x, int y );
virtual void show();
virtual void hide();
virtual bool restoreUnder( const QRect &r, QGfxRasterBase *g = 0 );
virtual void saveUnder();
virtual void drawCursor();
//void draw();
virtual bool supportsAlphaCursor();
static bool enabled() { return qt_sw_cursor; }
protected:
QGfxRasterBase *gfx;
QGfxRasterBase *gfxunder;
QImage *imgunder;
QImage *cursor;
uchar *fb_start;
uchar *fb_end;
bool save_under;
SWCursorData *data;
int clipWidth;
int clipHeight;
int myoffset;
};
extern QScreenCursor * qt_screencursor;
#endif // QT_NO_QWS_CURSOR
struct fb_cmap;
// A (used) chunk of offscreen memory
class QPoolEntry
{
public:
unsigned int start;
unsigned int end;
int clientId;
};
class QScreen;
typedef void(*ClearCacheFunc)(QScreen *obj, int);
class QScreen {
public:
QScreen( int display_id );
virtual ~QScreen();
virtual bool initDevice() = 0;
virtual bool connect( const QString &displaySpec ) = 0;
virtual void disconnect() = 0;
virtual int initCursor(void *, bool=FALSE);
virtual void shutdownDevice();
virtual void setMode(int,int,int) = 0;
virtual bool supportsDepth(int) const;
virtual QGfx * createGfx(unsigned char *,int,int,int,int);
virtual QGfx * screenGfx();
virtual void save();
virtual void restore();
virtual void blank(bool on);
virtual int pixmapOffsetAlignment() { return 64; }
virtual int pixmapLinestepAlignment() { return 64; }
virtual int sharedRamSize(void *) { return 0; }
virtual bool onCard(unsigned char *) const;
virtual bool onCard(unsigned char *, ulong& out_offset) const;
// sets a single color in the colormap
virtual void set(unsigned int,unsigned int,unsigned int,unsigned int);
// allocates a color
virtual int alloc(unsigned int,unsigned int,unsigned int);
int width() const { return w; }
int height() const { return h; }
int depth() const { return d; }
virtual int pixmapDepth() const;
int pixelType() const { return pixeltype; }
int linestep() const { return lstep; }
int deviceWidth() const { return dw; }
int deviceHeight() const { return dh; }
uchar * base() const { return data; }
// Ask for memory from card cache with alignment
virtual uchar * cache(int,int) { return 0; }
virtual void uncache(uchar *) {}
int screenSize() const { return size; }
int totalSize() const { return mapsize; }
QRgb * clut() { return screenclut; }
int numCols() { return screencols; }
virtual QSize mapToDevice( const QSize & ) const;
virtual QSize mapFromDevice( const QSize & ) const;
virtual QPoint mapToDevice( const QPoint &, const QSize & ) const;
virtual QPoint mapFromDevice( const QPoint &, const QSize & ) const;
virtual QRect mapToDevice( const QRect &, const QSize & ) const;
virtual QRect mapFromDevice( const QRect &, const QSize & ) const;
virtual QImage mapToDevice( const QImage & ) const;
virtual QImage mapFromDevice( const QImage & ) const;
virtual QRegion mapToDevice( const QRegion &, const QSize & ) const;
virtual QRegion mapFromDevice( const QRegion &, const QSize & ) const;
virtual int transformOrientation() const;
virtual bool isTransformed() const;
virtual bool isInterlaced() const;
virtual void setDirty( const QRect& );
virtual int memoryNeeded(const QString&);
int * opType() { return screen_optype; }
int * lastOp() { return screen_lastop; }
virtual void haltUpdates();
virtual void resumeUpdates();
protected:
// Only used without QT_NO_QWS_REPEATER, but included so that
// it's binary compatible regardless.
int * screen_optype;
int * screen_lastop;
QRgb screenclut[256];
int screencols;
bool initted;
uchar * data;
// Table of allocated lumps, kept in sorted highest-to-lowest order
// The table itself is allocated at the bottom of offscreen memory
// i.e. it's similar to having a stack (the table) and a heap
// (the allocated blocks). Freed space is implicitly described
// by the gaps between the allocated lumps (this saves entries and
// means we don't need to worry about coalescing freed lumps)
QPoolEntry * entries;
int * entryp;
unsigned int * lowest;
int w;
int lstep;
int h;
int d;
int pixeltype;
bool grayscale;
int dw;
int dh;
int hotx;
int hoty;
QImage cursor;
int size; // Screen size
int mapsize; // Total mapped memory
int displayId;
friend class QWSServer;
static ClearCacheFunc clearCacheFunc;
};
extern QScreen * qt_screen;
class Q_EXPORT QGfx : public Qt {
public:
// With loadable drivers, do probe here
static QGfx *createGfx( int depth, unsigned char *buffer,
int w, int h, int linestep );
virtual ~QGfx() {}
virtual void setPen( const QPen & )=0;
virtual void setBrush( const QBrush & )=0;
virtual void setBrushPixmap( const QPixmap * )=0;
virtual void setBrushOffset( int, int ) = 0;
virtual void setClipRect( int,int,int,int )=0;
virtual void setClipRegion( const QRegion & )=0;
virtual void setClipDeviceRegion( const QRegion & )=0;
virtual void setClipping (bool)=0;
// These will be called from qwidget_qws or qwidget_mac
// to update the drawing area when a widget is moved
virtual void setOffset( int,int )=0;
virtual void setWidgetRect( int,int,int,int )=0;
virtual void setWidgetRegion( const QRegion & )=0;
virtual void setWidgetDeviceRegion( const QRegion & )=0;
virtual void setSourceWidgetOffset(int x, int y) = 0;
virtual void setGlobalRegionIndex( int idx ) = 0;
virtual void setDashedLines(bool d) = 0;
virtual void setDashes(char *, int) = 0;
virtual void setOpaqueBackground(bool b)=0;
virtual void setBackgroundColor(QColor c)=0;
// Drawing operations
virtual void drawPoint( int,int )=0;
virtual void drawPoints( const QPointArray &,int,int )=0;
virtual void moveTo( int,int )=0;
virtual void lineTo( int,int )=0;
virtual void drawLine( int,int,int,int )=0;
virtual void drawPolyline( const QPointArray &,int,int )=0;
// current position
virtual QPoint pos() const = 0;
// Fill operations - these use the current source (pixmap,
// color, etc), and draws outline
virtual void fillRect( int,int,int,int )=0;
virtual void drawPolygon( const QPointArray &,bool,int,int )=0;
virtual void setLineStep(int)=0;
// Special case of rect-with-pixmap-fill for speed/hardware acceleration
virtual void blt( int,int,int,int,int,int )=0;
virtual void scroll( int,int,int,int,int,int )=0;
#if !defined(QT_NO_MOVIE) || !defined(QT_NO_TRANSFORMATIONS) || !defined(QT_NO_PIXMAP_TRANSFORMATION)
virtual void stretchBlt( int,int,int,int,int,int )=0;
#endif
virtual void tiledBlt( int,int,int,int )=0;
enum SourceType { SourcePen, SourceImage, SourceAccel };
enum PixelType { NormalPixel, BGRPixel };
// Setting up source data - can be solid color or pixmap data
virtual void setSource(const QPaintDevice *)=0;
virtual void setSource(const QImage *)=0;
virtual void setSource(unsigned char *,int,int,int,int,QRgb *,int);
// This one is pen
virtual void setSourcePen()=0;
virtual void drawAlpha(int,int,int,int,int,int,int,int) {}
virtual void hsync(int) {}
// These apply only to blt's. For alpha values for general
// drawing operations we should probably have a separate QGfx
// class. It's not a high priority though.
// Enum values: Ignore alpha information, alpha information encoded in
// 32-bit rgba along with colors, alpha information in 8bpp
// format in alphabits
enum AlphaType { IgnoreAlpha, InlineAlpha, SeparateAlpha,
LittleEndianMask, BigEndianMask, SolidAlpha };
// Can be no alpha, inline (32bit data), separate (for images),
// LittleEndianMask/BigEndianMask 1bpp masks, constant alpha
// value
virtual void setAlphaType(AlphaType)=0;
// Pointer to data, linestep
virtual void setAlphaSource(unsigned char *,int)=0;
virtual void setAlphaSource(int,int=-1,int=-1,int=-1)=0;
virtual void drawGlyphs( QMemoryManager::FontID font, glyph_t *glyphs, QPoint *positions, int num_glyphs ) = 0;
virtual void setClut(QRgb *,int)=0;
// Save and restore pen and brush state - necessary when setting
// up a bitBlt for example
virtual void save()=0;
virtual void restore()=0;
virtual void setRop(RasterOp)=0;
virtual void setScreen(QScreen *,QScreenCursor *,bool,int *,int *);
void setShared(void * v) { shared_data=v; }
bool isScreenGfx() { return is_screen_gfx; } //for cursor..
protected:
bool is_screen_gfx;
void * shared_data;
};
// This lives in loadable modules
#ifndef QT_LOADABLE_MODULES
extern "C" QScreen * qt_get_screen( int display_id, const char* spec );
#endif
// This is in main lib, loads the right module, calls qt_get_screen
// In non-loadable cases just aliases to qt_get_screen
const unsigned char * qt_probe_bus();
#endif // QGFX_QWS_H
