QRasterPaintEngine Class Reference

The QRasterPaintEngine class enables hardware acceleration of painting operations in Qt for Embedded Linux. More...

#include <qpaintengine_raster_p.h>

Inheritance diagram for QRasterPaintEngine:

Collaboration diagram for QRasterPaintEngine:

Public Types
enum	ClipType { RectClip , ComplexClip }
Public Types inherited from QPaintEngineEx
enum	Flags { DoNotEmulate = 0x01 , IsEmulationEngine = 0x02 }
Public Types inherited from QPaintEngine
enum	PaintEngineFeature {   PrimitiveTransform = 0x00000001 , PatternTransform = 0x00000002 , PixmapTransform = 0x00000004 , PatternBrush = 0x00000008 ,   LinearGradientFill = 0x00000010 , RadialGradientFill = 0x00000020 , ConicalGradientFill = 0x00000040 , AlphaBlend = 0x00000080 ,   PorterDuff = 0x00000100 , PainterPaths = 0x00000200 , Antialiasing = 0x00000400 , BrushStroke = 0x00000800 ,   ConstantOpacity = 0x00001000 , MaskedBrush = 0x00002000 , PerspectiveTransform = 0x00004000 , BlendModes = 0x00008000 ,   ObjectBoundingModeGradients = 0x00010000 , RasterOpModes = 0x00020000 , PaintOutsidePaintEvent = 0x20000000 , AllFeatures = 0xffffffff }
enum	DirtyFlag {   DirtyPen = 0x0001 , DirtyBrush = 0x0002 , DirtyBrushOrigin = 0x0004 , DirtyFont = 0x0008 ,   DirtyBackground = 0x0010 , DirtyBackgroundMode = 0x0020 , DirtyTransform = 0x0040 , DirtyClipRegion = 0x0080 ,   DirtyClipPath = 0x0100 , DirtyHints = 0x0200 , DirtyCompositionMode = 0x0400 , DirtyClipEnabled = 0x0800 ,   DirtyOpacity = 0x1000 , AllDirty = 0xffff }
enum	PolygonDrawMode { OddEvenMode , WindingMode , ConvexMode , PolylineMode }
enum	Type {   X11 , Windows , QuickDraw , CoreGraphics ,   MacPrinter , QWindowSystem , OpenGL , Picture ,   SVG , Raster , Direct3D , Pdf ,   OpenVG , OpenGL2 , PaintBuffer , Blitter ,   Direct2D , User = 50 , MaxUser = 100 }

Public Member Functions
	QRasterPaintEngine (QPaintDevice *device)
	~QRasterPaintEngine ()
bool	begin (QPaintDevice *device) override
bool	end () override
void	penChanged () override
void	brushChanged () override
void	brushOriginChanged () override
void	opacityChanged () override
void	compositionModeChanged () override
void	renderHintsChanged () override
void	transformChanged () override
void	clipEnabledChanged () override
void	setState (QPainterState *s) override
QPainterState *	createState (QPainterState *orig) const override
QRasterPaintEngineState *	state ()
const QRasterPaintEngineState *	state () const
void	updateBrush (const QBrush &brush)
void	updatePen (const QPen &pen)
void	updateMatrix (const QTransform &matrix)
virtual void	fillPath (const QPainterPath &path, QSpanData *fillData)
virtual void	fillPolygon (const QPointF *points, int pointCount, PolygonDrawMode mode)
void	drawPolygon (const QPointF *points, int pointCount, PolygonDrawMode mode) override
void	drawPolygon (const QPoint *points, int pointCount, PolygonDrawMode mode) override
void	drawEllipse (const QRectF &rect) override
void	fillRect (const QRectF &rect, const QBrush &brush) override
void	fillRect (const QRectF &rect, const QColor &color) override
void	drawRects (const QRect *rects, int rectCount) override
void	drawRects (const QRectF *rects, int rectCount) override
void	drawPixmap (const QPointF &p, const QPixmap &pm) override
void	drawPixmap (const QRectF &r, const QPixmap &pm, const QRectF &sr) override
void	drawImage (const QPointF &p, const QImage &img) override
void	drawImage (const QRectF &r, const QImage &pm, const QRectF &sr, Qt::ImageConversionFlags flags=Qt::AutoColor) override
void	drawTiledPixmap (const QRectF &r, const QPixmap &pm, const QPointF &sr) override
void	drawTextItem (const QPointF &p, const QTextItem &textItem) override
void	drawLines (const QLine *line, int lineCount) override
void	drawLines (const QLineF *line, int lineCount) override
void	drawPoints (const QPointF *points, int pointCount) override
void	drawPoints (const QPoint *points, int pointCount) override
void	stroke (const QVectorPath &path, const QPen &pen) override
void	fill (const QVectorPath &path, const QBrush &brush) override
void	clip (const QVectorPath &path, Qt::ClipOperation op) override
void	clip (const QRect &rect, Qt::ClipOperation op) override
void	clip (const QRegion &region, Qt::ClipOperation op) override
const QClipData *	clipData () const
void	drawStaticTextItem (QStaticTextItem *textItem) override
virtual bool	drawCachedGlyphs (int numGlyphs, const glyph_t *glyphs, const QFixedPoint *positions, QFontEngine *fontEngine)
ClipType	clipType () const
QRectF	clipBoundingRect () const
QRasterBuffer *	rasterBuffer ()
void	alphaPenBlt (const void *src, int bpl, int depth, int rx, int ry, int w, int h, bool useGammaCorrection)
Type	type () const override
QPoint	coordinateOffset () const override
bool	requiresPretransformedGlyphPositions (QFontEngine *fontEngine, const QTransform &m) const override
bool	shouldDrawCachedGlyphs (QFontEngine *fontEngine, const QTransform &m) const override
Public Member Functions inherited from QPaintEngineEx
	QPaintEngineEx ()
virtual void	draw (const QVectorPath &path)
virtual void	clip (const QPainterPath &path, Qt::ClipOperation op)
virtual void	drawRoundedRect (const QRectF &rect, qreal xrad, qreal yrad, Qt::SizeMode mode)
virtual void	drawEllipse (const QRect &r) override
virtual void	drawPath (const QPainterPath &path) override
virtual void	drawPixmapFragments (const QPainter::PixmapFragment *fragments, int fragmentCount, const QPixmap &pixmap, QFlags< QPainter::PixmapFragmentHint > hints)
virtual void	updateState (const QPaintEngineState &state) override
QPainterState *	state ()
const QPainterState *	state () const
virtual void	sync ()
virtual void	beginNativePainting ()
virtual void	endNativePainting ()
virtual uint	flags () const
Public Member Functions inherited from QPaintEngine
	QPaintEngine (PaintEngineFeatures features=PaintEngineFeatures())
virtual	~QPaintEngine ()
bool	isActive () const
void	setActive (bool newState)
void	setPaintDevice (QPaintDevice *device)
QPaintDevice *	paintDevice () const
void	setSystemClip (const QRegion &baseClip)
QRegion	systemClip () const
void	setSystemRect (const QRect &rect)
QRect	systemRect () const
void	fix_neg_rect (int *x, int *y, int *w, int *h)
bool	testDirty (DirtyFlags df)
void	setDirty (DirtyFlags df)
void	clearDirty (DirtyFlags df)
bool	hasFeature (PaintEngineFeatures feature) const
QPainter *	painter () const
void	syncState ()
bool	isExtended () const
virtual QPixmap	createPixmap (QSize size)
virtual QPixmap	createPixmapFromImage (QImage image, Qt::ImageConversionFlags flags=Qt::AutoColor)

Protected Member Functions
	QRasterPaintEngine (QRasterPaintEnginePrivate &d, QPaintDevice *)
Protected Member Functions inherited from QPaintEngineEx
	QPaintEngineEx (QPaintEngineExPrivate &data)
Protected Member Functions inherited from QPaintEngine
	QPaintEngine (QPaintEnginePrivate &data, PaintEngineFeatures devcaps=PaintEngineFeatures())

Friends
struct	QSpanData
class	QBlitterPaintEngine
class	QBlitterPaintEnginePrivate

Related Functions
(Note that these are not member functions.)
	QSpan

Additional Inherited Members
Protected Attributes inherited from QPaintEngine
QPaintEngineState *	state
PaintEngineFeatures	gccaps
uint	active: 1
uint	selfDestruct: 1
uint	extended: 1
QScopedPointer< QPaintEnginePrivate >	d_ptr

Detailed Description

The QRasterPaintEngine class enables hardware acceleration of painting operations in Qt for Embedded Linux.

\preliminary

\inmodule QtGui

Since

4.2

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

Definition at line 129 of file qpaintengine_raster_p.h.

Member Enumeration Documentation

ClipType

enum QRasterPaintEngine::ClipType

Enumerator
RectClip
ComplexClip

Definition at line 202 of file qpaintengine_raster_p.h.

Constructor & Destructor Documentation

QRasterPaintEngine() [1/2]

QRasterPaintEngine::QRasterPaintEngine

(

QPaintDevice *

device

)

Since

4.5

Creates a raster based paint engine for operating on the given device, with the complete set of \l {QPaintEngine::PaintEngineFeature}{paint engine features and capabilities}.

Definition at line 332 of file qpaintengine_raster.cpp.

~QRasterPaintEngine()

QRasterPaintEngine::~QRasterPaintEngine

(

)

Destroys this paint engine.

Definition at line 422 of file qpaintengine_raster.cpp.

QRasterPaintEngine() [2/2]

QRasterPaintEngine::QRasterPaintEngine ( QRasterPaintEnginePrivate &  d, QPaintDevice *  device  )

protected

Definition at line 342 of file qpaintengine_raster.cpp.

Member Function Documentation

alphaPenBlt()

void QRasterPaintEngine::alphaPenBlt	(	const void *	src,
		int	bpl,
		int	depth,
		int	rx,
		int	ry,
		int	w,
		int	h,
		bool	useGammaCorrection
	)

Definition at line 2568 of file qpaintengine_raster.cpp.

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begin()

bool QRasterPaintEngine::begin ( QPaintDevice *  device )

overridevirtual

\reimp

Implements QPaintEngine.

Definition at line 432 of file qpaintengine_raster.cpp.

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brushChanged()

void QRasterPaintEngine::brushChanged ( )

overridevirtual

Implements QPaintEngineEx.

Definition at line 735 of file qpaintengine_raster.cpp.

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brushOriginChanged()

void QRasterPaintEngine::brushOriginChanged ( )

overridevirtual

Implements QPaintEngineEx.

Definition at line 721 of file qpaintengine_raster.cpp.

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clip() [1/3]

void QRasterPaintEngine::clip ( const QRect &  rect, Qt::ClipOperation  op  )

overridevirtual

Reimplemented from QPaintEngineEx.

Definition at line 1241 of file qpaintengine_raster.cpp.

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clip() [2/3]

void QRasterPaintEngine::clip ( const QRegion &  region, Qt::ClipOperation  op  )

overridevirtual

Reimplemented from QPaintEngineEx.

Definition at line 1317 of file qpaintengine_raster.cpp.

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clip() [3/3]

void QRasterPaintEngine::clip ( const QVectorPath &  path, Qt::ClipOperation  op  )

overridevirtual

Implements QPaintEngineEx.

Definition at line 1167 of file qpaintengine_raster.cpp.

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clipBoundingRect()

QRectF QRasterPaintEngine::clipBoundingRect

(

)

const

Definition at line 3516 of file qpaintengine_raster.cpp.

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clipData()

const QClipData * QRasterPaintEngine::clipData ( ) const

inline

Definition at line 476 of file qpaintengine_raster_p.h.

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clipEnabledChanged()

void QRasterPaintEngine::clipEnabledChanged ( )

overridevirtual

Implements QPaintEngineEx.

Definition at line 887 of file qpaintengine_raster.cpp.

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clipType()

QRasterPaintEngine::ClipType QRasterPaintEngine::clipType

(

)

const

Definition at line 3501 of file qpaintengine_raster.cpp.

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compositionModeChanged()

void QRasterPaintEngine::compositionModeChanged ( )

overridevirtual

Implements QPaintEngineEx.

Definition at line 814 of file qpaintengine_raster.cpp.

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coordinateOffset()

QPoint QRasterPaintEngine::coordinateOffset ( ) const

overridevirtual

Reimplemented from QPaintEngine.

Definition at line 3398 of file qpaintengine_raster.cpp.

createState()

QPainterState * QRasterPaintEngine::createState ( QPainterState *  orig ) const

overridevirtual

Reimplemented from QPaintEngineEx.

Definition at line 593 of file qpaintengine_raster.cpp.

drawCachedGlyphs()

bool QRasterPaintEngine::drawCachedGlyphs ( int  numGlyphs, const glyph_t *  glyphs, const QFixedPoint *  positions, QFontEngine *  fontEngine  )

virtual

Reimplemented in QBlitterPaintEngine.

Definition at line 2795 of file qpaintengine_raster.cpp.

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drawEllipse()

void QRasterPaintEngine::drawEllipse ( const QRectF &  rect )

overridevirtual

\reimp

Reimplemented from QPaintEngineEx.

Definition at line 3304 of file qpaintengine_raster.cpp.

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drawImage() [1/2]

void QRasterPaintEngine::drawImage ( const QPointF &  p, const QImage &  img  )

overridevirtual

Reimplemented from QPaintEngineEx.

Definition at line 2129 of file qpaintengine_raster.cpp.

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drawImage() [2/2]

void QRasterPaintEngine::drawImage ( const QRectF &  r, const QImage &  img, const QRectF &  sr, Qt::ImageConversionFlags  flags = Qt::AutoColor  )

overridevirtual

\reimp

Implements QPaintEngineEx.

Definition at line 2232 of file qpaintengine_raster.cpp.

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drawLines() [1/2]

void QRasterPaintEngine::drawLines ( const QLine *  lines, int  lineCount  )

overridevirtual

\reimp

Reimplemented from QPaintEngineEx.

Definition at line 3201 of file qpaintengine_raster.cpp.

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drawLines() [2/2]

void QRasterPaintEngine::drawLines ( const QLineF *  lines, int  lineCount  )

overridevirtual

\reimp

Reimplemented from QPaintEngineEx.

Definition at line 3278 of file qpaintengine_raster.cpp.

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drawPixmap() [1/2]

void QRasterPaintEngine::drawPixmap ( const QPointF &  p, const QPixmap &  pm  )

overridevirtual

Reimplemented from QPaintEngineEx.

Definition at line 2021 of file qpaintengine_raster.cpp.

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drawPixmap() [2/2]

void QRasterPaintEngine::drawPixmap ( const QRectF &  r, const QPixmap &  pixmap, const QRectF &  sr  )

overridevirtual

\reimp

Implements QPaintEngineEx.

Definition at line 2062 of file qpaintengine_raster.cpp.

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drawPoints() [1/2]

void QRasterPaintEngine::drawPoints ( const QPoint *  points, int  pointCount  )

overridevirtual

Draws the first pointCount points in the buffer points

The default implementation converts the first pointCount QPoints in points to QPointFs and calls the floating point version of drawPoints.

Reimplemented from QPaintEngineEx.

Definition at line 3180 of file qpaintengine_raster.cpp.

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drawPoints() [2/2]

void QRasterPaintEngine::drawPoints ( const QPointF *  points, int  pointCount  )

overridevirtual

\reimp

Reimplemented from QPaintEngineEx.

Definition at line 3161 of file qpaintengine_raster.cpp.

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drawPolygon() [1/2]

void QRasterPaintEngine::drawPolygon ( const QPoint *  points, int  pointCount, PolygonDrawMode  mode  )

overridevirtual

\reimp

Reimplemented from QPaintEngineEx.

Definition at line 1957 of file qpaintengine_raster.cpp.

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drawPolygon() [2/2]

void QRasterPaintEngine::drawPolygon ( const QPointF *  points, int  pointCount, PolygonDrawMode  mode  )

overridevirtual

\reimp

Reimplemented from QPaintEngineEx.

Definition at line 1916 of file qpaintengine_raster.cpp.

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drawRects() [1/2]

void QRasterPaintEngine::drawRects ( const QRect *  rects, int  rectCount  )

overridevirtual

\reimp

Reimplemented from QPaintEngineEx.

Definition at line 1482 of file qpaintengine_raster.cpp.

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drawRects() [2/2]

void QRasterPaintEngine::drawRects ( const QRectF *  rects, int  rectCount  )

overridevirtual

\reimp

Reimplemented from QPaintEngineEx.

Definition at line 1536 of file qpaintengine_raster.cpp.

drawStaticTextItem()

void QRasterPaintEngine::drawStaticTextItem ( QStaticTextItem *  textItem )

overridevirtual

\reimp

Reimplemented from QPaintEngineEx.

Definition at line 3063 of file qpaintengine_raster.cpp.

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drawTextItem()

void QRasterPaintEngine::drawTextItem ( const QPointF &  p, const QTextItem &  textItem  )

overridevirtual

\reimp

Reimplemented from QPaintEngine.

Definition at line 3099 of file qpaintengine_raster.cpp.

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drawTiledPixmap()

void QRasterPaintEngine::drawTiledPixmap ( const QRectF &  r, const QPixmap &  pixmap, const QPointF &  sr  )

overridevirtual

\reimp

Reimplemented from QPaintEngineEx.

Definition at line 2481 of file qpaintengine_raster.cpp.

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end()

bool QRasterPaintEngine::end ( )

overridevirtual

\reimp

Implements QPaintEngine.

Definition at line 508 of file qpaintengine_raster.cpp.

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fill()

void QRasterPaintEngine::fill ( const QVectorPath &  path, const QBrush &  brush  )

overridevirtual

Implements QPaintEngineEx.

Definition at line 1677 of file qpaintengine_raster.cpp.

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fillPath()

void QRasterPaintEngine::fillPath ( const QPainterPath &  path, QSpanData *  fillData  )

virtual

Reimplemented in QBlitterPaintEngine.

Definition at line 1378 of file qpaintengine_raster.cpp.

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fillPolygon()

void QRasterPaintEngine::fillPolygon ( const QPointF *  points, int  pointCount, PolygonDrawMode  mode  )

virtual

Reimplemented in QBlitterPaintEngine.

Definition at line 1882 of file qpaintengine_raster.cpp.

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fillRect() [1/2]

void QRasterPaintEngine::fillRect ( const QRectF &  r, const QBrush &  brush  )

overridevirtual

\reimp

Reimplemented from QPaintEngineEx.

Definition at line 1786 of file qpaintengine_raster.cpp.

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fillRect() [2/2]

void QRasterPaintEngine::fillRect ( const QRectF &  r, const QColor &  color  )

overridevirtual

\reimp

Reimplemented from QPaintEngineEx.

Definition at line 1803 of file qpaintengine_raster.cpp.

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opacityChanged()

void QRasterPaintEngine::opacityChanged ( )

overridevirtual

Implements QPaintEngineEx.

Definition at line 796 of file qpaintengine_raster.cpp.

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penChanged()

void QRasterPaintEngine::penChanged ( )

overridevirtual

Implements QPaintEngineEx.

Definition at line 632 of file qpaintengine_raster.cpp.

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rasterBuffer()

QRasterBuffer * QRasterPaintEngine::rasterBuffer

(

)

Definition at line 2559 of file qpaintengine_raster.cpp.

renderHintsChanged()

void QRasterPaintEngine::renderHintsChanged ( )

overridevirtual

Implements QPaintEngineEx.

Definition at line 835 of file qpaintengine_raster.cpp.

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requiresPretransformedGlyphPositions()

bool QRasterPaintEngine::requiresPretransformedGlyphPositions ( QFontEngine *  fontEngine, const QTransform &  m  ) const

overridevirtual

Reimplemented from QPaintEngineEx.

Definition at line 3364 of file qpaintengine_raster.cpp.

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setState()

void QRasterPaintEngine::setState ( QPainterState *  s )

overridevirtual

Reimplemented from QPaintEngineEx.

Definition at line 607 of file qpaintengine_raster.cpp.

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shouldDrawCachedGlyphs()

bool QRasterPaintEngine::shouldDrawCachedGlyphs ( QFontEngine *  fontEngine, const QTransform &  m  ) const

overridevirtual

Returns whether glyph caching is supported by the font engine fontEngine with the given transform m applied.

Reimplemented from QPaintEngineEx.

Definition at line 3378 of file qpaintengine_raster.cpp.

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state() [1/2]

QRasterPaintEngineState * QRasterPaintEngine::state ( )

inline

Definition at line 150 of file qpaintengine_raster_p.h.

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state() [2/2]

const QRasterPaintEngineState * QRasterPaintEngine::state ( ) const

inline

Definition at line 153 of file qpaintengine_raster_p.h.

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stroke()

void QRasterPaintEngine::stroke ( const QVectorPath &  path, const QPen &  pen  )

overridevirtual

Reimplemented from QPaintEngineEx.

Definition at line 1588 of file qpaintengine_raster.cpp.

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transformChanged()

void QRasterPaintEngine::transformChanged ( )

overridevirtual

Implements QPaintEngineEx.

Definition at line 867 of file qpaintengine_raster.cpp.

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type()

Type QRasterPaintEngine::type ( ) const

inlineoverridevirtual

Reimplement this function to return the paint engine \l{Type}.

Implements QPaintEngine.

Definition at line 219 of file qpaintengine_raster_p.h.

updateBrush()

void QRasterPaintEngine::updateBrush

(

const QBrush &

brush

)

Definition at line 750 of file qpaintengine_raster.cpp.

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updateMatrix()

void QRasterPaintEngine::updateMatrix

(

const QTransform &

matrix

)

Definition at line 524 of file qpaintengine_raster.cpp.

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updatePen()

void QRasterPaintEngine::updatePen

(

const QPen &

pen

)

Definition at line 646 of file qpaintengine_raster.cpp.

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Friends And Related Function Documentation

QBlitterPaintEngine

friend class QBlitterPaintEngine

friend

Definition at line 230 of file qpaintengine_raster_p.h.

QBlitterPaintEnginePrivate

friend class QBlitterPaintEnginePrivate

friend

Definition at line 231 of file qpaintengine_raster_p.h.

QSpan()

QSpan

related

A struct equivalent to QT_FT_Span, containing a position (x, y), the span's length in pixels and its color/coverage (a value ranging from 0 to 255).

Definition at line 97 of file qdrawhelper_p.h.

QSpanData

friend struct QSpanData

friend

Definition at line 229 of file qpaintengine_raster_p.h.

---

The documentation for this class was generated from the following files:

• src/gui/painting/qpaintengine_raster_p.h
• src/gui/painting/qpaintengine_raster.cpp