QPaintEngine Class Reference

The QPaintEngine class provides an abstract definition of how QPainter draws to a given device on a given platform. More...

#include <qpaintengine.h>

Inheritance diagram for QPaintEngine:

Collaboration diagram for QPaintEngine:

Public Types
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
	QPaintEngine (PaintEngineFeatures features=PaintEngineFeatures())
virtual	~QPaintEngine ()
bool	isActive () const
void	setActive (bool newState)
virtual bool	begin (QPaintDevice *pdev)=0
virtual bool	end ()=0
virtual void	updateState (const QPaintEngineState &state)=0
virtual void	drawRects (const QRect *rects, int rectCount)
virtual void	drawRects (const QRectF *rects, int rectCount)
virtual void	drawLines (const QLine *lines, int lineCount)
virtual void	drawLines (const QLineF *lines, int lineCount)
virtual void	drawEllipse (const QRectF &r)
virtual void	drawEllipse (const QRect &r)
virtual void	drawPath (const QPainterPath &path)
virtual void	drawPoints (const QPointF *points, int pointCount)
virtual void	drawPoints (const QPoint *points, int pointCount)
virtual void	drawPolygon (const QPointF *points, int pointCount, PolygonDrawMode mode)
virtual void	drawPolygon (const QPoint *points, int pointCount, PolygonDrawMode mode)
virtual void	drawPixmap (const QRectF &r, const QPixmap &pm, const QRectF &sr)=0
virtual void	drawTextItem (const QPointF &p, const QTextItem &textItem)
virtual void	drawTiledPixmap (const QRectF &r, const QPixmap &pixmap, const QPointF &s)
virtual void	drawImage (const QRectF &r, const QImage &pm, const QRectF &sr, Qt::ImageConversionFlags flags=Qt::AutoColor)
void	setPaintDevice (QPaintDevice *device)
QPaintDevice *	paintDevice () const
void	setSystemClip (const QRegion &baseClip)
QRegion	systemClip () const
void	setSystemRect (const QRect &rect)
QRect	systemRect () const
virtual QPoint	coordinateOffset () const
virtual Type	type () const =0
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
	QPaintEngine (QPaintEnginePrivate &data, PaintEngineFeatures devcaps=PaintEngineFeatures())

Protected Attributes
QPaintEngineState *	state
PaintEngineFeatures	gccaps
uint	active: 1
uint	selfDestruct: 1
uint	extended: 1
QScopedPointer< QPaintEnginePrivate >	d_ptr

Friends
class	QPainterReplayer
class	QFontEngineBox
class	QFontEngineMac
class	QFontEngineWin
class	QMacPrintEngine
class	QMacPrintEnginePrivate
class	QFontEngineQPF2
class	QPainter
class	QPainterPrivate
class	QWidget
class	QWidgetPrivate
class	QWin32PaintEngine
class	QWin32PaintEnginePrivate
class	QMacCGContext
class	QPreviewPaintEngine
class	QX11GLPlatformPixmap

Detailed Description

The QPaintEngine class provides an abstract definition of how QPainter draws to a given device on a given platform.

\inmodule QtGui

Qt provides several premade implementations of QPaintEngine for the different painter backends we support. The primary paint engine provided is the raster paint engine, which contains a software rasterizer which supports the full feature set on all supported platforms. This is the default for painting on QWidget-based classes in e.g. on Windows, X11 and \macos, it is the backend for painting on QImage and it is used as a fallback for paint engines that do not support a certain capability. In addition we provide QPaintEngine implementations for OpenGL (accessible through QOpenGLWidget) and printing (which allows using QPainter to draw on a QPrinter object).

If one wants to use QPainter to draw to a different backend, one must subclass QPaintEngine and reimplement all its virtual functions. The QPaintEngine implementation is then made available by subclassing QPaintDevice and reimplementing the virtual function QPaintDevice::paintEngine().

QPaintEngine is created and owned by the QPaintDevice that created it.

See also

QPainter, QPaintDevice::paintEngine(), {Paint System}

Definition at line 86 of file qpaintengine.h.

Member Enumeration Documentation

DirtyFlag

enum QPaintEngine::DirtyFlag

\value DirtyPen The pen is dirty and needs to be updated.

\value DirtyBrush The brush is dirty and needs to be updated.

\value DirtyBrushOrigin The brush origin is dirty and needs to updated.

\value DirtyFont The font is dirty and needs to be updated.

\value DirtyBackground The background is dirty and needs to be updated.

\value DirtyBackgroundMode The background mode is dirty and needs to be updated.

\value DirtyTransform The transform is dirty and needs to be updated.

\value DirtyClipRegion The clip region is dirty and needs to be updated.

\value DirtyClipPath The clip path is dirty and needs to be updated.

\value DirtyHints The render hints is dirty and needs to be updated.

\value DirtyCompositionMode The composition mode is dirty and needs to be updated.

\value DirtyClipEnabled Whether clipping is enabled or not is dirty and needs to be updated.

\value DirtyOpacity The constant opacity has changed and needs to be updated as part of the state change in QPaintEngine::updateState().

\value AllDirty Convenience enum used internally.

These types are used by QPainter to trigger lazy updates of the various states in the QPaintEngine using QPaintEngine::updateState().

A paint engine must update every dirty state.

Enumerator
DirtyPen
DirtyBrush
DirtyBrushOrigin
DirtyFont
DirtyBackground
DirtyBackgroundMode
DirtyTransform
DirtyClipRegion
DirtyClipPath
DirtyHints
DirtyCompositionMode
DirtyClipEnabled
DirtyOpacity
AllDirty

Definition at line 121 of file qpaintengine.h.

PaintEngineFeature

enum QPaintEngine::PaintEngineFeature

This enum is used to describe the features or capabilities that the paint engine has. If a feature is not supported by the engine, QPainter will do a best effort to emulate that feature through other means and pass on an alpha blended QImage to the engine with the emulated results. Some features cannot be emulated: AlphaBlend and PorterDuff.

\value AlphaBlend The engine can alpha blend primitives. \value Antialiasing The engine can use antialiasing to improve the appearance of rendered primitives. \value BlendModes The engine supports blending modes. \value BrushStroke The engine supports drawing strokes that contain brushes as fills, not just solid colors (e.g. a dashed gradient line of width 2). \value ConicalGradientFill The engine supports conical gradient fills. \value ConstantOpacity The engine supports the feature provided by QPainter::setOpacity(). \value LinearGradientFill The engine supports linear gradient fills. \value MaskedBrush The engine is capable of rendering brushes that has a texture with an alpha channel or a mask. \value ObjectBoundingModeGradients The engine has native support for gradients with coordinate mode QGradient::ObjectBoundingMode. Otherwise, if QPaintEngine::PatternTransform is supported, object bounding mode gradients are converted to gradients with coordinate mode QGradient::LogicalMode and a brush transform for the coordinate mapping. \value PainterPaths The engine has path support. \value PaintOutsidePaintEvent The engine is capable of painting outside of paint events. \value PatternBrush The engine is capable of rendering brushes with the brush patterns specified in Qt::BrushStyle. \value PatternTransform The engine has support for transforming brush patterns. \value PerspectiveTransform The engine has support for performing perspective transformations on primitives. \value PixmapTransform The engine can transform pixmaps, including rotation and shearing. \value PorterDuff The engine supports Porter-Duff operations \value PrimitiveTransform The engine has support for transforming drawing primitives. \value RadialGradientFill The engine supports radial gradient fills. \value RasterOpModes The engine supports bitwise raster operations. \value AllFeatures All of the above features. This enum value is usually used as a bit mask.

Enumerator
PrimitiveTransform
PatternTransform
PixmapTransform
PatternBrush
LinearGradientFill
RadialGradientFill
ConicalGradientFill
AlphaBlend
PorterDuff
PainterPaths
Antialiasing
BrushStroke
ConstantOpacity
MaskedBrush
PerspectiveTransform
BlendModes
ObjectBoundingModeGradients
RasterOpModes
PaintOutsidePaintEvent
AllFeatures

Definition at line 90 of file qpaintengine.h.

PolygonDrawMode

enum QPaintEngine::PolygonDrawMode

\value OddEvenMode The polygon should be drawn using OddEven fill rule.

\value WindingMode The polygon should be drawn using Winding fill rule.

\value ConvexMode The polygon is a convex polygon and can be drawn using specialized algorithms where available.

\value PolylineMode Only the outline of the polygon should be drawn.

Enumerator
OddEvenMode
WindingMode
ConvexMode
PolylineMode

Definition at line 140 of file qpaintengine.h.

Type

enum QPaintEngine::Type

\value X11 \value Windows \value MacPrinter \value CoreGraphics \macos's Quartz2D (CoreGraphics) \value QuickDraw \macos's QuickDraw \value QWindowSystem Qt for Embedded Linux \value OpenGL \value Picture QPicture format \value SVG Scalable Vector Graphics XML format \value Raster \value Direct3D Windows only, Direct3D based engine \value Pdf Portable Document Format \value OpenVG \value User First user type ID \value MaxUser Last user type ID \value OpenGL2 \value PaintBuffer \value Blitter \value Direct2D Windows only, Direct2D based engine

Enumerator
X11
Windows
QuickDraw
CoreGraphics
MacPrinter
QWindowSystem
OpenGL
Picture
SVG
Raster
Direct3D
Pdf
OpenVG
OpenGL2
PaintBuffer
Blitter
Direct2D
User
MaxUser

Definition at line 193 of file qpaintengine.h.

Constructor & Destructor Documentation

QPaintEngine() [1/2]

QPaintEngine::QPaintEngine ( PaintEngineFeatures  caps = PaintEngineFeatures() )

explicit

Creates a paint engine with the featureset specified by caps.

Definition at line 696 of file qpaintengine.cpp.

~QPaintEngine()

QPaintEngine::~QPaintEngine ( )

virtual

Destroys the paint engine.

Definition at line 725 of file qpaintengine.cpp.

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QPaintEngine() [2/2]

QPaintEngine::QPaintEngine ( QPaintEnginePrivate &  data, PaintEngineFeatures  devcaps = PaintEngineFeatures()  )

protected

Definition at line 711 of file qpaintengine.cpp.

Member Function Documentation

begin()

bool QPaintEngine::begin ( QPaintDevice *  pdev )

pure virtual

Reimplement this function to initialise your paint engine when painting is to start on the paint device pdev. Return true if the initialization was successful; otherwise return false.

See also

end(), isActive()

Implemented in QPdfPrintEngine, QAlphaPaintEngine, QX11PaintEngine, QWindowsDirect2DPaintEngine, QPdfEngine, QBlitterPaintEngine, QEmulationPaintEngine, QPicturePaintEngine, QCoreGraphicsPaintEngine, QOpenGL2PaintEngineEx, QRasterPaintEngine, QWin32PrintEngine, QPreviewPaintEngine, QMacPrintEngine, TestPaintEngine, DummyPaintEngine, MyPaintEngine, and PaintEngine.

clearDirty()

void QPaintEngine::clearDirty ( DirtyFlags  df )

inline

Definition at line 331 of file qpaintengine.h.

coordinateOffset()

QPoint QPaintEngine::coordinateOffset ( ) const

virtual

Reimplemented in QRasterPaintEngine.

Definition at line 936 of file qpaintengine.cpp.

createPixmap()

QPixmap QPaintEngine::createPixmap ( QSize  size )

virtual

Definition at line 1006 of file qpaintengine.cpp.

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createPixmapFromImage()

QPixmap QPaintEngine::createPixmapFromImage ( QImage  image, Qt::ImageConversionFlags  flags = Qt::AutoColor  )

virtual

Definition at line 1023 of file qpaintengine.cpp.

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drawEllipse() [1/2]

void QPaintEngine::drawEllipse ( const QRect &  rect )

virtual

The default implementation of this function calls the floating point version of this function

Reimplemented in QX11PaintEngine, QWindowsDirect2DPaintEngine, QPaintEngineEx, and QCoreGraphicsPaintEngine.

Definition at line 523 of file qpaintengine.cpp.

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drawEllipse() [2/2]

void QPaintEngine::drawEllipse ( const QRectF &  rect )

virtual

Reimplement this function to draw the largest ellipse that can be contained within rectangle rect.

The default implementation calls drawPolygon().

Reimplemented in QRasterPaintEngine, QBlitterPaintEngine, QPicturePaintEngine, QX11PaintEngine, QWindowsDirect2DPaintEngine, QPaintEngineEx, QMacPrintEngine, and QCoreGraphicsPaintEngine.

Definition at line 507 of file qpaintengine.cpp.

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drawImage()

void QPaintEngine::drawImage ( const QRectF &  rectangle, const QImage &  image, const QRectF &  sr, Qt::ImageConversionFlags  flags = Qt::AutoColor  )

virtual

Reimplement this function to draw the part of the image specified by the sr rectangle in the given rectangle using the given conversion flags flags, to convert it to a pixmap.

Reimplemented in QWindowsDirect2DPaintEngine, QPaintEngineEx, QOpenGL2PaintEngineEx, QPdfEngine, QRasterPaintEngine, QBlitterPaintEngine, QCoreGraphicsPaintEngine, QEmulationPaintEngine, QMacPrintEngine, QX11PaintEngine, and QPicturePaintEngine.

Definition at line 620 of file qpaintengine.cpp.

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drawLines() [1/2]

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

virtual

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

The default implementation converts the first lineCount lines in lines to a QLineF and calls the floating point version of this function.

Reimplemented in QX11PaintEngine, QPaintEngineEx, QCoreGraphicsPaintEngine, and QRasterPaintEngine.

Definition at line 818 of file qpaintengine.cpp.

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drawLines() [2/2]

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

virtual

The default implementation splits the list of lines in lines into lineCount separate calls to drawPath() or drawPolygon() depending on the feature set of the paint engine.

Reimplemented in QX11PaintEngine, QPdfEngine, QPaintEngineEx, QMacPrintEngine, QCoreGraphicsPaintEngine, and QRasterPaintEngine.

Definition at line 796 of file qpaintengine.cpp.

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drawPath()

void QPaintEngine::drawPath ( const QPainterPath &  path )

virtual

The default implementation ignores the path and does nothing.

Reimplemented in QWin32PrintEngine, QPreviewPaintEngine, QAlphaPaintEngine, QX11PaintEngine, QPdfEngine, QPaintEngineEx, QPicturePaintEngine, QCoreGraphicsPaintEngine, and QMacPrintEngine.

Definition at line 741 of file qpaintengine.cpp.

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drawPixmap()

void QPaintEngine::drawPixmap ( const QRectF &  r, const QPixmap &  pm, const QRectF &  sr  )

pure virtual

Reimplement this function to draw the part of the pm specified by the sr rectangle in the given r.

Implemented in QPdfEngine, QPaintEngineEx, QWin32PrintEngine, QPreviewPaintEngine, QAlphaPaintEngine, QX11PaintEngine, QWindowsDirect2DPaintEngine, QOpenGL2PaintEngineEx, QRasterPaintEngine, QBlitterPaintEngine, QEmulationPaintEngine, QPicturePaintEngine, QMacPrintEngine, QCoreGraphicsPaintEngine, TestPaintEngine, DummyPaintEngine, MyPaintEngine, and PaintEngine.

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drawPoints() [1/2]

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

virtual

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 in QX11PaintEngine, QPaintEngineEx, QRasterPaintEngine, QBlitterPaintEngine, and QCoreGraphicsPaintEngine.

Definition at line 482 of file qpaintengine.cpp.

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drawPoints() [2/2]

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

virtual

Draws the first pointCount points in the buffer points

Reimplemented in QX11PaintEngine, QPdfEngine, QPaintEngineEx, QRasterPaintEngine, QBlitterPaintEngine, QMacPrintEngine, and QCoreGraphicsPaintEngine.

Definition at line 438 of file qpaintengine.cpp.

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drawPolygon() [1/2]

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

virtual

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Reimplement this virtual function to draw the polygon defined by the pointCount first points in points, using mode mode.

Note

At least one of the drawPolygon() functions must be reimplemented.

Reimplemented in QX11PaintEngine, QPaintEngineEx, QRasterPaintEngine, QBlitterPaintEngine, and QCoreGraphicsPaintEngine.

Definition at line 358 of file qpaintengine.cpp.

drawPolygon() [2/2]

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

virtual

Reimplement this virtual function to draw the polygon defined by the pointCount first points in points, using mode mode.

Note

At least one of the drawPolygon() functions must be reimplemented.

Reimplemented in QWin32PrintEngine, QPreviewPaintEngine, QAlphaPaintEngine, QX11PaintEngine, QPdfEngine, QPaintEngineEx, QRasterPaintEngine, QBlitterPaintEngine, QMacPrintEngine, QCoreGraphicsPaintEngine, QPicturePaintEngine, and TestPaintEngine.

Definition at line 329 of file qpaintengine.cpp.

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drawRects() [1/2]

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

virtual

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

The default implementation converts the first rectCount rectangles in the buffer rects to a QRectF and calls the floating point version of this function.

Reimplemented in QX11PaintEngine, QWindowsDirect2DPaintEngine, QPaintEngineEx, QRasterPaintEngine, QBlitterPaintEngine, and QCoreGraphicsPaintEngine.

Definition at line 854 of file qpaintengine.cpp.

drawRects() [2/2]

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

virtual

Draws the first rectCount rectangles in the buffer rects. The default implementation of this function calls drawPath() or drawPolygon() depending on the feature set of the paint engine.

Reimplemented in QX11PaintEngine, QWindowsDirect2DPaintEngine, QPdfEngine, QPaintEngineEx, QRasterPaintEngine, QBlitterPaintEngine, QCoreGraphicsPaintEngine, and QMacPrintEngine.

Definition at line 884 of file qpaintengine.cpp.

drawTextItem()

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

virtual

This function draws the text item textItem at position p. The default implementation of this function converts the text to a QPainterPath and paints the resulting path.

Reimplemented in QCoreGraphicsPaintEngine, QPicturePaintEngine, QMacPrintEngine, QWin32PrintEngine, QPreviewPaintEngine, QAlphaPaintEngine, QX11PaintEngine, QWindowsDirect2DPaintEngine, QOpenGL2PaintEngineEx, QPdfEngine, QRasterPaintEngine, QBlitterPaintEngine, QEmulationPaintEngine, and TestPaintEngine.

Definition at line 754 of file qpaintengine.cpp.

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drawTiledPixmap()

void QPaintEngine::drawTiledPixmap ( const QRectF &  rect, const QPixmap &  pixmap, const QPointF &  p  )

virtual

Reimplement this function to draw the pixmap in the given rect, starting at the given p. The pixmap will be drawn repeatedly until the rect is filled.

Reimplemented in QPdfEngine, QRasterPaintEngine, QBlitterPaintEngine, QWin32PrintEngine, QPreviewPaintEngine, QAlphaPaintEngine, QX11PaintEngine, QPaintEngineEx, QEmulationPaintEngine, QPicturePaintEngine, QMacPrintEngine, and QCoreGraphicsPaintEngine.

Definition at line 585 of file qpaintengine.cpp.

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end()

bool QPaintEngine::end ( )

pure virtual

Reimplement this function to finish painting on the current paint device. Return true if painting was finished successfully; otherwise return false.

See also

begin(), isActive()

Implemented in TestPaintEngine, DummyPaintEngine, MyPaintEngine, PaintEngine, QWin32PrintEngine, QPdfPrintEngine, QPreviewPaintEngine, QAlphaPaintEngine, QX11PaintEngine, QWindowsDirect2DPaintEngine, QOpenGL2PaintEngineEx, QPdfEngine, QRasterPaintEngine, QBlitterPaintEngine, QEmulationPaintEngine, QPicturePaintEngine, QMacPrintEngine, and QCoreGraphicsPaintEngine.

fix_neg_rect()

void QPaintEngine::fix_neg_rect ( int *  x, int *  y, int *  w, int *  h  )

inline

Definition at line 309 of file qpaintengine.h.

hasFeature()

bool QPaintEngine::hasFeature ( PaintEngineFeatures  feature ) const

inline

Returns true if the paint engine supports the specified feature; otherwise returns false.

Definition at line 221 of file qpaintengine.h.

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isActive()

bool QPaintEngine::isActive ( ) const

inline

Returns true if the paint engine is actively drawing; otherwise returns false.

See also

setActive()

Definition at line 150 of file qpaintengine.h.

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isExtended()

bool QPaintEngine::isExtended ( ) const

inline

Definition at line 226 of file qpaintengine.h.

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paintDevice()

QPaintDevice * QPaintEngine::paintDevice

(

)

const

Returns the device that this engine is painting on, if painting is active; otherwise returns \nullptr.

Definition at line 921 of file qpaintengine.cpp.

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painter()

QPainter * QPaintEngine::painter

(

)

const

Returns the paint engine's painter.

Definition at line 732 of file qpaintengine.cpp.

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setActive()

void QPaintEngine::setActive ( bool  state )

inline

Sets the active state of the paint engine to state.

See also

isActive()

Definition at line 151 of file qpaintengine.h.

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setDirty()

void QPaintEngine::setDirty ( DirtyFlags  df )

inline

Definition at line 326 of file qpaintengine.h.

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setPaintDevice()

void QPaintEngine::setPaintDevice

(

QPaintDevice *

device

)

Definition at line 912 of file qpaintengine.cpp.

setSystemClip()

void QPaintEngine::setSystemClip

(

const QRegion &

baseClip

)

Definition at line 950 of file qpaintengine.cpp.

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setSystemRect()

void QPaintEngine::setSystemRect

(

const QRect &

rect

)

Definition at line 981 of file qpaintengine.cpp.

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syncState()

void QPaintEngine::syncState

(

)

Definition at line 303 of file qpaintengine.cpp.

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systemClip()

QRegion QPaintEngine::systemClip

(

)

const

Definition at line 970 of file qpaintengine.cpp.

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systemRect()

QRect QPaintEngine::systemRect

(

)

const

Definition at line 996 of file qpaintengine.cpp.

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testDirty()

bool QPaintEngine::testDirty ( DirtyFlags  df )

inline

Definition at line 321 of file qpaintengine.h.

type()

Type QPaintEngine::type ( ) const

pure virtual

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

Implemented in TestPaintEngine, DummyPaintEngine, MyPaintEngine, PaintEngine, QWin32PrintEngine, QPreviewPaintEngine, QX11PaintEngine, QWindowsDirect2DPaintEngine, QOpenGL2PaintEngineEx, QPdfEngine, QRasterPaintEngine, QBlitterPaintEngine, QEmulationPaintEngine, QPicturePaintEngine, QMacPrintEngine, and QCoreGraphicsPaintEngine.

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updateState()

void QPaintEngine::updateState ( const QPaintEngineState &  state )

pure virtual

Reimplement this function to update the state of a paint engine.

When implemented, this function is responsible for checking the paint engine's current state and update the properties that are changed. Use the QPaintEngineState::state() function to find out which properties that must be updated, then use the corresponding \l {GetFunction}{get function} to retrieve the current values for the given properties.

See also

QPaintEngineState

Implemented in QWin32PrintEngine, QPreviewPaintEngine, QAlphaPaintEngine, QX11PaintEngine, QPdfEngine, QPaintEngineEx, QPicturePaintEngine, QMacPrintEngine, QCoreGraphicsPaintEngine, TestPaintEngine, DummyPaintEngine, MyPaintEngine, and PaintEngine.

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Friends And Related Function Documentation

QFontEngineBox

friend class QFontEngineBox

friend

Definition at line 249 of file qpaintengine.h.

QFontEngineMac

friend class QFontEngineMac

friend

Definition at line 250 of file qpaintengine.h.

QFontEngineQPF2

friend class QFontEngineQPF2

friend

Definition at line 254 of file qpaintengine.h.

QFontEngineWin

friend class QFontEngineWin

friend

Definition at line 251 of file qpaintengine.h.

QMacCGContext

friend class QMacCGContext

friend

Definition at line 261 of file qpaintengine.h.

QMacPrintEngine

friend class QMacPrintEngine

friend

Definition at line 252 of file qpaintengine.h.

QMacPrintEnginePrivate

friend class QMacPrintEnginePrivate

friend

Definition at line 253 of file qpaintengine.h.

QPainter

friend class QPainter

friend

Definition at line 255 of file qpaintengine.h.

QPainterPrivate

friend class QPainterPrivate

friend

Definition at line 256 of file qpaintengine.h.

QPainterReplayer

friend class QPainterReplayer

friend

Definition at line 248 of file qpaintengine.h.

QPreviewPaintEngine

friend class QPreviewPaintEngine

friend

Definition at line 262 of file qpaintengine.h.

QWidget

friend class QWidget

friend

Definition at line 257 of file qpaintengine.h.

QWidgetPrivate

friend class QWidgetPrivate

friend

Definition at line 258 of file qpaintengine.h.

QWin32PaintEngine

friend class QWin32PaintEngine

friend

Definition at line 259 of file qpaintengine.h.

QWin32PaintEnginePrivate

friend class QWin32PaintEnginePrivate

friend

Definition at line 260 of file qpaintengine.h.

QX11GLPlatformPixmap

friend class QX11GLPlatformPixmap

friend

Definition at line 263 of file qpaintengine.h.

Member Data Documentation

active

uint QPaintEngine::active

protected

Definition at line 237 of file qpaintengine.h.

d_ptr

QScopedPointer<QPaintEnginePrivate> QPaintEngine::d_ptr

protected

Definition at line 241 of file qpaintengine.h.

extended

uint QPaintEngine::extended

protected

Definition at line 239 of file qpaintengine.h.

gccaps

PaintEngineFeatures QPaintEngine::gccaps

protected

Definition at line 235 of file qpaintengine.h.

selfDestruct

uint QPaintEngine::selfDestruct

protected

Definition at line 238 of file qpaintengine.h.

state

QPaintEngineState* QPaintEngine::state

protected

Definition at line 234 of file qpaintengine.h.

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

• src/gui/painting/qpaintengine.h
• src/gui/painting/qpaintengine.cpp