QRasterPaintEngine Class
The QRasterPaintEngine class enables hardware acceleration of painting operations in Qt for Embedded Linux. More...
Header: | #include <QRasterPaintEngine> |
qmake: | QT += gui |
Since: | Qt 4.2 |
Inherits: | QPaintEngineEx |
This class is under development and is subject to change.
Public Functions
QRasterPaintEngine(QPaintDevice *device) | |
virtual | ~QRasterPaintEngine() |
void | alphaPenBlt(const void *src, int bpl, int depth, int rx, int ry, int w, int h, bool useGammaCorrection) |
QRect | clipBoundingRect() const |
const QClipData * | clipData() const |
QRasterPaintEngine::ClipType | clipType() const |
virtual bool | drawCachedGlyphs(int numGlyphs, const glyph_t *glyphs, const QFixedPoint *positions, QFontEngine *fontEngine) |
virtual void | fillPath(const QPainterPath &path, QSpanData *fillData) |
virtual void | fillPolygon(const QPointF *points, int pointCount, QPaintEngine::PolygonDrawMode mode) |
QRasterBuffer * | rasterBuffer() |
void | releaseBuffer() |
void | saveBuffer(const QString &s) const |
QSize | size() const |
QRasterPaintEngineState * | state() |
const QRasterPaintEngineState * | state() const |
void | updateBrush(const QBrush &brush) |
void | updateMatrix(const QTransform &matrix) |
void | updatePen(const QPen &pen) |
Reimplemented Public Functions
virtual bool | begin(QPaintDevice *device) override |
virtual void | brushChanged() override |
virtual void | brushOriginChanged() override |
virtual void | clip(const QVectorPath &path, Qt::ClipOperation op) override |
virtual void | clip(const QRect &rect, Qt::ClipOperation op) override |
virtual void | clip(const QRegion ®ion, Qt::ClipOperation op) override |
virtual void | clipEnabledChanged() override |
virtual void | compositionModeChanged() override |
virtual QPoint | coordinateOffset() const override |
virtual QPainterState * | createState(QPainterState *orig) const override |
virtual void | drawEllipse(const QRectF &rect) override |
virtual void | drawImage(const QPointF &p, const QImage &img) override |
virtual void | drawImage(const QRectF &r, const QImage &pm, const QRectF &sr, Qt::ImageConversionFlags flags = Qt::AutoColor) override |
virtual void | drawLines(const QLine *line, int lineCount) override |
virtual void | drawLines(const QLineF *line, int lineCount) override |
virtual void | drawPixmap(const QPointF &p, const QPixmap &pm) override |
virtual void | drawPixmap(const QRectF &r, const QPixmap &pm, const QRectF &sr) override |
virtual void | drawPoints(const QPointF *points, int pointCount) override |
virtual void | drawPoints(const QPoint *points, int pointCount) override |
virtual void | drawPolygon(const QPointF *points, int pointCount, QPaintEngine::PolygonDrawMode mode) override |
virtual void | drawPolygon(const QPoint *points, int pointCount, QPaintEngine::PolygonDrawMode mode) override |
virtual void | drawRects(const QRect *rects, int rectCount) override |
virtual void | drawRects(const QRectF *rects, int rectCount) override |
virtual void | drawStaticTextItem(QStaticTextItem *textItem) override |
virtual void | drawTextItem(const QPointF &p, const QTextItem &textItem) override |
virtual void | drawTiledPixmap(const QRectF &r, const QPixmap &pm, const QPointF &sr) override |
virtual bool | end() override |
virtual void | fill(const QVectorPath &path, const QBrush &brush) override |
virtual void | fillRect(const QRectF &rect, const QBrush &brush) override |
virtual void | fillRect(const QRectF &rect, const QColor &color) override |
virtual void | opacityChanged() override |
virtual void | penChanged() override |
virtual void | renderHintsChanged() override |
virtual bool | requiresPretransformedGlyphPositions(QFontEngine *fontEngine, const QTransform &m) const override |
virtual void | setState(QPainterState *s) override |
virtual bool | shouldDrawCachedGlyphs(QFontEngine *fontEngine, const QTransform &m) const override |
virtual void | stroke(const QVectorPath &path, const QPen &pen) override |
virtual void | transformChanged() override |
virtual QPaintEngine::Type | type() const override |
- 30 public functions inherited from QPaintEngine
Protected Functions
QRasterPaintEngine(QRasterPaintEnginePrivate &d, QPaintDevice *) |
Related Non-Members
typedef | QSpan |
Detailed Description
The QRasterPaintEngine class enables hardware acceleration of painting operations in Qt for Embedded Linux.
Note that this functionality is only available in Qt for Embedded Linux.
In Qt for Embedded Linux, painting is a pure software implementation. But starting with Qt 4.2, it is possible to add an accelerated graphics driver to take advantage of available hardware resources.
Hardware acceleration is accomplished by creating a custom screen driver, accelerating the copying from memory to the screen, and implementing a custom paint engine accelerating the various painting operations. Then a custom paint device and a custom window surface must be implemented to make Qt for Embedded Linux aware of the accelerated driver.
Note: The QRasterPaintEngine class does not support 8-bit images. Instead, they need to be converted to a supported format, such as QImage::Format_ARGB32_Premultiplied.
See also QPaintEngine.
Member Function Documentation
QRasterPaintEngine::QRasterPaintEngine(QPaintDevice *device)
Default constructs an instance of QRasterPaintEngine.
[protected]
QRasterPaintEngine::QRasterPaintEngine(QRasterPaintEnginePrivate &d, QPaintDevice *)
Default constructs an instance of QRasterPaintEngine.
[virtual]
QRasterPaintEngine::~QRasterPaintEngine()
Destroys the instance of QRasterPaintEngine. The destructor is virtual.
void QRasterPaintEngine::alphaPenBlt(const void *src, int bpl, int depth, int rx, int ry, int w, int h, bool useGammaCorrection)
[override virtual]
bool QRasterPaintEngine::begin(QPaintDevice *device)
[override virtual]
void QRasterPaintEngine::brushChanged()
[override virtual]
void QRasterPaintEngine::brushOriginChanged()
[override virtual]
void QRasterPaintEngine::clip(const QVectorPath &path, Qt::ClipOperation op)
[override virtual]
void QRasterPaintEngine::clip(const QRect &rect, Qt::ClipOperation op)
[override virtual]
void QRasterPaintEngine::clip(const QRegion ®ion, Qt::ClipOperation op)
QRect QRasterPaintEngine::clipBoundingRect() const
const QClipData *QRasterPaintEngine::clipData() const
[override virtual]
void QRasterPaintEngine::clipEnabledChanged()
QRasterPaintEngine::ClipType QRasterPaintEngine::clipType() const
[override virtual]
void QRasterPaintEngine::compositionModeChanged()
[override virtual]
QPoint QRasterPaintEngine::coordinateOffset() const
[override virtual]
QPainterState *QRasterPaintEngine::createState(QPainterState *orig) const
[virtual]
bool QRasterPaintEngine::drawCachedGlyphs(int numGlyphs, const glyph_t *glyphs, const QFixedPoint *positions, QFontEngine *fontEngine)
[override virtual]
void QRasterPaintEngine::drawEllipse(const QRectF &rect)
[override virtual]
void QRasterPaintEngine::drawImage(const QPointF &p, const QImage &img)
[override virtual]
void QRasterPaintEngine::drawImage(const QRectF &r, const QImage &pm, const QRectF &sr, Qt::ImageConversionFlags flags = Qt::AutoColor)
[override virtual]
void QRasterPaintEngine::drawLines(const QLine *line, int lineCount)
[override virtual]
void QRasterPaintEngine::drawLines(const QLineF *line, int lineCount)
[override virtual]
void QRasterPaintEngine::drawPixmap(const QPointF &p, const QPixmap &pm)
[override virtual]
void QRasterPaintEngine::drawPixmap(const QRectF &r, const QPixmap &pm, const QRectF &sr)
[override virtual]
void QRasterPaintEngine::drawPoints(const QPointF *points, int pointCount)
[override virtual]
void QRasterPaintEngine::drawPoints(const QPoint *points, int pointCount)
[override virtual]
void QRasterPaintEngine::drawPolygon(const QPointF *points, int pointCount, QPaintEngine::PolygonDrawMode mode)
[override virtual]
void QRasterPaintEngine::drawPolygon(const QPoint *points, int pointCount, QPaintEngine::PolygonDrawMode mode)
[override virtual]
void QRasterPaintEngine::drawRects(const QRect *rects, int rectCount)
[override virtual]
void QRasterPaintEngine::drawRects(const QRectF *rects, int rectCount)
[override virtual]
void QRasterPaintEngine::drawStaticTextItem(QStaticTextItem *textItem)
[override virtual]
void QRasterPaintEngine::drawTextItem(const QPointF &p, const QTextItem &textItem)
[override virtual]
void QRasterPaintEngine::drawTiledPixmap(const QRectF &r, const QPixmap &pm, const QPointF &sr)
[override virtual]
bool QRasterPaintEngine::end()
[override virtual]
void QRasterPaintEngine::fill(const QVectorPath &path, const QBrush &brush)
[virtual]
void QRasterPaintEngine::fillPath(const QPainterPath &path, QSpanData *fillData)
[virtual]
void QRasterPaintEngine::fillPolygon(const QPointF *points, int pointCount, QPaintEngine::PolygonDrawMode mode)
[override virtual]
void QRasterPaintEngine::fillRect(const QRectF &rect, const QBrush &brush)
[override virtual]
void QRasterPaintEngine::fillRect(const QRectF &rect, const QColor &color)
[override virtual]
void QRasterPaintEngine::opacityChanged()
[override virtual]
void QRasterPaintEngine::penChanged()
QRasterBuffer *QRasterPaintEngine::rasterBuffer()
void QRasterPaintEngine::releaseBuffer()
[override virtual]
void QRasterPaintEngine::renderHintsChanged()
[override virtual]
bool QRasterPaintEngine::requiresPretransformedGlyphPositions(QFontEngine *fontEngine, const QTransform &m) const
void QRasterPaintEngine::saveBuffer(const QString &s) const
[override virtual]
void QRasterPaintEngine::setState(QPainterState *s)
See also state().
[override virtual]
bool QRasterPaintEngine::shouldDrawCachedGlyphs(QFontEngine *fontEngine, const QTransform &m) const
QSize QRasterPaintEngine::size() const
QRasterPaintEngineState *QRasterPaintEngine::state()
See also setState().