#include <qrasterbackingstore_p.h>

Inheritance diagram for QRasterBackingStore:

Collaboration diagram for QRasterBackingStore:

Public Member Functions
	QRasterBackingStore (QWindow *window)

	~QRasterBackingStore ()

void	resize (const QSize &size, const QRegion &staticContents) override

bool	scroll (const QRegion &area, int dx, int dy) override
	Scrolls the given area dx pixels to the right and dy downward; both dx and dy may be negative.

void	beginPaint (const QRegion &region) override
	This function is called before painting onto the surface begins, with the region in which the painting will occur.

QPaintDevice *	paintDevice () override
	Implement this function to return the appropriate paint device.

QImage	toImage () const override
	Implemented in subclasses to return the content of the backingstore as a QImage.

Public Member Functions inherited from QPlatformBackingStore
	QPlatformBackingStore (QWindow *window)
	Constructs an empty surface for the given top-level window.

virtual	~QPlatformBackingStore ()
	Destroys this surface.

QWindow *	window () const
	Returns a pointer to the top-level window associated with this surface.

QBackingStore *	backingStore () const
	Returns a pointer to the backing store associated with this surface.

virtual QPaintDevice *	paintDevice ()=0
	Implement this function to return the appropriate paint device.

virtual void	flush (QWindow *window, const QRegion &region, const QPoint &offset)
	Flushes the given region from the specified window.

virtual FlushResult	rhiFlush (QWindow window, qreal sourceDevicePixelRatio, const QRegion &region, const QPoint &offset, QPlatformTextureList textures, bool translucentBackground)
	Flushes the given region from the specified window, and compositing it with the specified textures list.

virtual QImage	toImage () const
	Implemented in subclasses to return the content of the backingstore as a QImage.

virtual QRhiTexture *	toTexture (QRhiResourceUpdateBatch resourceUpdates, const QRegion &dirtyRegion, TextureFlags flags) const
	May be reimplemented in subclasses to return the content of the backingstore as an QRhiTexture.

virtual QPlatformGraphicsBuffer *	graphicsBuffer () const
	Accessor for a backingstores graphics buffer abstraction.

virtual void	resize (const QSize &size, const QRegion &staticContents)=0

virtual bool	scroll (const QRegion &area, int dx, int dy)
	Scrolls the given area dx pixels to the right and dy downward; both dx and dy may be negative.

virtual void	beginPaint (const QRegion &)
	This function is called before painting onto the surface begins, with the region in which the painting will occur.

virtual void	endPaint ()
	This function is called after painting onto the surface has ended.

void	setRhiConfig (const QPlatformBackingStoreRhiConfig &config)

QRhi *	rhi () const

QRhiSwapChain *	rhiSwapChain () const

void	surfaceAboutToBeDestroyed ()

void	graphicsDeviceReportedLost ()

Protected Member Functions
virtual QImage::Format	format () const

Protected Attributes
QImage	m_image

QSize	m_requestedSize

Additional Inherited Members
Public Types inherited from QPlatformBackingStore
enum	FlushResult { FlushSuccess , FlushFailed , FlushFailedDueToLostDevice }

enum	TextureFlag { TextureSwizzle = 0x01 , TextureFlip = 0x02 , TexturePremultiplied = 0x04 }

Detailed Description

Definition at line 24 of file qrasterbackingstore_p.h.

Constructor & Destructor Documentation

◆ QRasterBackingStore()

QT_BEGIN_NAMESPACE QRasterBackingStore::QRasterBackingStore ( QWindow * window )

Definition at line 14 of file qrasterbackingstore.cpp.

◆ ~QRasterBackingStore()

QRasterBackingStore::~QRasterBackingStore ( )

Definition at line 19 of file qrasterbackingstore.cpp.

Member Function Documentation

◆ beginPaint()

void QRasterBackingStore::beginPaint ( const QRegion & )

overridevirtual

This function is called before painting onto the surface begins, with the region in which the painting will occur.

See also: endPaint(), paintDevice()

Reimplemented from QPlatformBackingStore.

Definition at line 63 of file qrasterbackingstore.cpp.

References QPainter::CompositionMode_Source, QImage::devicePixelRatio(), QPlatformWindow::devicePixelRatio(), QImage::fill(), QPainter::fillRect(), QImage::format(), format(), QImage::Format_ARGB32_Premultiplied, QImage::hasAlphaChannel(), m_image, m_requestedSize, painter, rect, QPainter::setCompositionMode(), QImage::setDevicePixelRatio(), QImage::size(), Qt::transparent, and QPlatformBackingStore::window().

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◆ format()

QImage::Format QRasterBackingStore::format ( ) const

protectedvirtual

Definition at line 29 of file qrasterbackingstore.cpp.

References format(), QImage::Format_ARGB32_Premultiplied, QImage::Format_RGB32, hasAlpha(), and QPlatformBackingStore::window().

Referenced by beginPaint(), and format().

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◆ paintDevice()

QPaintDevice * QRasterBackingStore::paintDevice ( )

overridevirtual

Implement this function to return the appropriate paint device.

Implements QPlatformBackingStore.

Definition at line 37 of file qrasterbackingstore.cpp.

References m_image.

◆ resize()

void QRasterBackingStore::resize	(	const QSize &	size,
		const QRegion &	staticContents
	)

overridevirtual

Implements QPlatformBackingStore.

Definition at line 23 of file qrasterbackingstore.cpp.

References m_requestedSize, and Q_UNUSED.

◆ scroll()

bool QRasterBackingStore::scroll	(	const QRegion &	area,
		int	dx,
		int	dy
	)

overridevirtual

Scrolls the given area dx pixels to the right and dy downward; both dx and dy may be negative.

Returns true if the area was scrolled successfully; false otherwise.

Reimplemented from QPlatformBackingStore.

Definition at line 47 of file qrasterbackingstore.cpp.

References QRegion::boundingRect(), QImage::devicePixelRatio(), QPlatformSurface::isRasterSurface(), m_image, qt_scrollRectInImage(), rect, and QPlatformBackingStore::window().

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◆ toImage()

QImage QRasterBackingStore::toImage ( ) const

overridevirtual

Implemented in subclasses to return the content of the backingstore as a QImage.

If composition via a 3D graphics API is supported, either this function or toTexture() must be implemented.

The returned image is only valid until the next operation (resize, paint, scroll, or flush) on the backingstore. The caller must not store the return value between calls, but instead call this function before each use, or make an explicit copy.

See also: toTexture()

Reimplemented from QPlatformBackingStore.

Definition at line 42 of file qrasterbackingstore.cpp.

References m_image.

Member Data Documentation

◆ m_image

QImage QRasterBackingStore::m_image

protected

Definition at line 40 of file qrasterbackingstore_p.h.

Referenced by beginPaint(), QRhiBackingStore::flush(), paintDevice(), scroll(), and toImage().

◆ m_requestedSize

QSize QRasterBackingStore::m_requestedSize

protected

Definition at line 41 of file qrasterbackingstore_p.h.

Referenced by beginPaint(), and resize().

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

qtbase/src/gui/painting/qrasterbackingstore_p.h
qtbase/src/gui/painting/qrasterbackingstore.cpp

Public Member Functions

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QRasterBackingStore()

◆ ~QRasterBackingStore()

Member Function Documentation

◆ beginPaint()

◆ format()

◆ paintDevice()

◆ resize()

◆ scroll()

◆ toImage()

Member Data Documentation

◆ m_image

◆ m_requestedSize