#include <qpaintengine_alpha_p.h>

Inheritance diagram for QAlphaPaintEngine:

Collaboration diagram for QAlphaPaintEngine:

Public Member Functions
	~QAlphaPaintEngine ()

bool	begin (QPaintDevice *pdev) override
	Reimplement this function to initialise your paint engine when painting is to start on the paint device pdev.

bool	end () override
	Reimplement this function to finish painting on the current paint device.

void	updateState (const QPaintEngineState &state) override
	Reimplement this function to update the state of a paint engine.

void	drawPath (const QPainterPath &path) override
	The default implementation ignores the path and does nothing.

void	drawPolygon (const QPointF *points, int pointCount, PolygonDrawMode mode) override
	Reimplement this virtual function to draw the polygon defined by the pointCount first points in points, using mode mode.

void	drawPixmap (const QRectF &r, const QPixmap &pm, const QRectF &sr) override
	Reimplement this function to draw the part of the pm specified by the sr rectangle in the given r.

void	drawTextItem (const QPointF &p, const QTextItem &textItem) override
	This function draws the text item textItem at position p.

void	drawTiledPixmap (const QRectF &r, const QPixmap &pixmap, const QPointF &s) override
	Reimplement this function to draw the pixmap in the given rect, starting at the given p.

Public Member Functions inherited from QPaintEngine
	QPaintEngine (PaintEngineFeatures features=PaintEngineFeatures())
	Creates a paint engine with the featureset specified by caps.

virtual	~QPaintEngine ()
	Destroys the paint engine.

bool	isActive () const
	Returns `true` if the paint engine is actively drawing; otherwise returns `false`.

void	setActive (bool newState)
	Sets the active state of the paint engine to state.

virtual void	drawRects (const QRect *rects, int rectCount)
	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.

virtual void	drawRects (const QRectF *rects, int rectCount)
	Draws the first rectCount rectangles in the buffer rects.

virtual void	drawLines (const QLine *lines, int lineCount)
	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.

virtual void	drawLines (const QLineF *lines, int lineCount)
	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.

virtual void	drawEllipse (const QRectF &r)
	Reimplement this function to draw the largest ellipse that can be contained within rectangle rect.

virtual void	drawEllipse (const QRect &r)
	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 of this function calls the floating point version of this function.

virtual void	drawPoints (const QPointF *points, int pointCount)
	Draws the first pointCount points in the buffer points.

virtual void	drawPoints (const QPoint *points, int pointCount)
	Draws the first pointCount points in the buffer points.

virtual void	drawPolygon (const QPoint *points, int pointCount, PolygonDrawMode mode)
	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.

virtual void	drawImage (const QRectF &r, const QImage &pm, const QRectF &sr, Qt::ImageConversionFlags flags=Qt::AutoColor)
	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.

void	setPaintDevice (QPaintDevice *device)

QPaintDevice *	paintDevice () const
	Returns the device that this engine is painting on, if painting is active; otherwise returns \nullptr.

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

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

QPainter *	painter () const
	Returns the paint engine's painter.

void	syncState ()

bool	isExtended () const

virtual QPixmap	createPixmap (QSize size)

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

Protected Member Functions
	QAlphaPaintEngine (QAlphaPaintEnginePrivate &data, PaintEngineFeatures devcaps={ })

QRegion	alphaClipping () const

bool	continueCall () const

void	flushAndInit (bool init=true)

void	cleanUp ()

Protected Member Functions inherited from QPaintEngine
	QPaintEngine (QPaintEnginePrivate &data, PaintEngineFeatures devcaps=PaintEngineFeatures())

Additional Inherited Members
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 }
	This enum is used to describe the features or capabilities that the paint engine has. More...

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

enum	PolygonDrawMode { OddEvenMode , WindingMode , ConvexMode , PolylineMode }
	\value OddEvenMode The polygon should be drawn using OddEven fill rule. More...

enum	Type { X11 , Windows , QuickDraw , CoreGraphics , MacPrinter , QWindowSystem , OpenGL , Picture , SVG , Raster , Direct3D , Pdf , OpenVG , OpenGL2 , PaintBuffer , Blitter , Direct2D , User = 50 , MaxUser = 100 }
	\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 More...

Protected Attributes inherited from QPaintEngine
QPaintEngineState *	state

PaintEngineFeatures	gccaps

uint	active: 1

uint	selfDestruct: 1

uint	extended: 1

QScopedPointer< QPaintEnginePrivate >	d_ptr

Detailed Description

Definition at line 28 of file qpaintengine_alpha_p.h.

Constructor & Destructor Documentation

◆ ~QAlphaPaintEngine()

QAlphaPaintEngine::~QAlphaPaintEngine ( )

Definition at line 23 of file qpaintengine_alpha.cpp.

◆ QAlphaPaintEngine()

QT_BEGIN_NAMESPACE QAlphaPaintEngine::QAlphaPaintEngine	(	QAlphaPaintEnginePrivate &	data,
		PaintEngineFeatures	devcaps = { } )

protected

Definition at line 17 of file qpaintengine_alpha.cpp.

Member Function Documentation

◆ alphaClipping()

QRegion QAlphaPaintEngine::alphaClipping ( ) const

protected

Definition at line 249 of file qpaintengine_alpha.cpp.

References d.

Referenced by QWin32PrintEngine::updateClipPath().

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◆ begin()

bool QAlphaPaintEngine::begin ( QPaintDevice * pdev )

overridevirtual

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()

Implements QPaintEngine.

Reimplemented in QWin32PrintEngine.

Definition at line 28 of file qpaintengine_alpha.cpp.

References d, flushAndInit(), and QPaintEngine::gccaps.

Referenced by QWin32PrintEngine::begin().

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◆ cleanUp()

void QAlphaPaintEngine::cleanUp ( )

protected

Definition at line 337 of file qpaintengine_alpha.cpp.

References d.

Referenced by QWin32PrintEngine::begin(), QWin32PrintEngine::end(), and flushAndInit().

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◆ continueCall()

bool QAlphaPaintEngine::continueCall ( ) const

protected

Definition at line 255 of file qpaintengine_alpha.cpp.

References d.

Referenced by QWin32PrintEngine::begin(), QWin32PrintEngine::drawPath(), QWin32PrintEngine::drawPixmap(), QWin32PrintEngine::drawPolygon(), QWin32PrintEngine::drawTextItem(), QWin32PrintEngine::drawTiledPixmap(), QWin32PrintEngine::end(), and QWin32PrintEngine::updateState().

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◆ drawPath()

void QAlphaPaintEngine::drawPath ( const QPainterPath & path )

overridevirtual

The default implementation ignores the path and does nothing.

Reimplemented from QPaintEngine.

Reimplemented in QWin32PrintEngine.

Definition at line 131 of file qpaintengine_alpha.cpp.

References d, and tr.

Referenced by QWin32PrintEngine::drawPath().

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◆ drawPixmap()

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

overridevirtual

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

Implements QPaintEngine.

Reimplemented in QWin32PrintEngine.

Definition at line 184 of file qpaintengine_alpha.cpp.

References d, QPixmap::hasAlpha(), QPixmap::isQBitmap(), and tr.

Referenced by QWin32PrintEngine::drawPixmap().

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◆ drawPolygon()

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

overridevirtual

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 from QPaintEngine.

Reimplemented in QWin32PrintEngine.

Definition at line 154 of file qpaintengine_alpha.cpp.

References d, i, QList< T >::reserve(), and tr.

Referenced by QWin32PrintEngine::drawPolygon().

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◆ drawTextItem()

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

overridevirtual

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 from QPaintEngine.

Reimplemented in QWin32PrintEngine.

Definition at line 205 of file qpaintengine_alpha.cpp.

References d, and tr.

Referenced by QWin32PrintEngine::drawTextItem().

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◆ drawTiledPixmap()

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

overridevirtual

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 from QPaintEngine.

Reimplemented in QWin32PrintEngine.

Definition at line 228 of file qpaintengine_alpha.cpp.

References d, and pixmap.

Referenced by QWin32PrintEngine::drawTiledPixmap().

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◆ end()

bool QAlphaPaintEngine::end ( )

overridevirtual

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()

Implements QPaintEngine.

Reimplemented in QWin32PrintEngine.

Definition at line 60 of file qpaintengine_alpha.cpp.

References d, and flushAndInit().

Referenced by QWin32PrintEngine::end().

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◆ flushAndInit()

void QAlphaPaintEngine::flushAndInit ( bool init = true )

protected

Definition at line 261 of file qpaintengine_alpha.cpp.

References QPaintEngine::AllFeatures, cleanUp(), d, QPainter::drawPicture(), font, QPaintEngine::gccaps, init(), QPaintEngine::ObjectBoundingModeGradients, QPaintEngine::painter(), QPaintEngineState::painter(), Q_ASSERT, QPaintEngine::QPainter, qt_defaultDpiX(), qt_defaultDpiY(), rect, QPainter::restore(), QPainter::save(), QTransform::scale(), QPainter::setTransform(), QPaintEngine::state, and QPaintEngineState::state().

Referenced by begin(), end(), and QWin32PrintEngine::newPage().

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◆ updateState()

void QAlphaPaintEngine::updateState ( const QPaintEngineState & state )

overridevirtual

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.