#include <qfbbackingstore_p.h>

Inheritance diagram for QFbBackingStore:

Collaboration diagram for QFbBackingStore:

Public Member Functions
	QFbBackingStore (QWindow *window)

	~QFbBackingStore ()

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

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

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

const QImage	image ()

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

void	lock ()

void	unlock ()

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

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

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 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 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 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.

void	setRhiConfig (const QPlatformBackingStoreRhiConfig &config)

QRhi *	rhi () const

void	surfaceAboutToBeDestroyed ()

void	graphicsDeviceReportedLost ()

Protected Attributes
QImage	mImage

QMutex	mImageMutex

Friends
class	QFbWindow

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 28 of file qfbbackingstore_p.h.

Constructor & Destructor Documentation

◆ QFbBackingStore()

QT_BEGIN_NAMESPACE QFbBackingStore::QFbBackingStore ( QWindow * window )

Definition at line 14 of file qfbbackingstore.cpp.

References QScreen::handle(), and QPlatformBackingStore::window().

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◆ ~QFbBackingStore()

QFbBackingStore::~QFbBackingStore ( )

Definition at line 23 of file qfbbackingstore.cpp.

Member Function Documentation

◆ beginPaint()

void QFbBackingStore::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 64 of file qfbbackingstore.cpp.

References QPainter::CompositionMode_Source, QImage::hasAlphaChannel(), lock(), mImage, and Qt::transparent.

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◆ endPaint()

void QFbBackingStore::endPaint ( )

overridevirtual

This function is called after painting onto the surface has ended.

See also: beginPaint(), paintDevice()

Reimplemented from QPlatformBackingStore.

Definition at line 76 of file qfbbackingstore.cpp.

References unlock().

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◆ flush()

void QFbBackingStore::flush	(	QWindow *	window,
		const QRegion &	region,
		const QPoint &	offset )

overridevirtual

Flushes the given region from the specified window.

Note: region is relative to the window which may not be top-level in case window corresponds to a native child widget. offset is the position of the native child relative to the top-level window.

Unlike rhiFlush(), this function's default implementation does nothing. It is expected that subclasses provide a platform-specific (non-QRhi-based) implementation, if applicable on the given platform.

See also: rhiFlush()

Reimplemented from QPlatformBackingStore.

Definition at line 27 of file qfbbackingstore.cpp.

References Q_UNUSED, and QPlatformBackingStore::window().

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◆ image()

const QImage QFbBackingStore::image ( )

Definition at line 43 of file qfbbackingstore.cpp.

References mImage.

Referenced by QFbScreen::doRedraw().

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◆ lock()

void QFbBackingStore::lock ( )

Definition at line 54 of file qfbbackingstore.cpp.

References QMutex::lock(), and mImageMutex.

Referenced by beginPaint(), and QFbScreen::doRedraw().

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◆ paintDevice()

QPaintDevice * QFbBackingStore::paintDevice ( )

inlineoverridevirtual

Implement this function to return the appropriate paint device.

Implements QPlatformBackingStore.

Definition at line 34 of file qfbbackingstore_p.h.

References mImage.

◆ resize()

void QFbBackingStore::resize	(	const QSize &	size,
		const QRegion &	region )

overridevirtual

Implements QPlatformBackingStore.

Definition at line 35 of file qfbbackingstore.cpp.

References mImage, Q_UNUSED, screen, QImage::size(), and QPlatformBackingStore::window().

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◆ toImage()

QImage QFbBackingStore::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 49 of file qfbbackingstore.cpp.

References mImage.

◆ unlock()

void QFbBackingStore::unlock ( )

Definition at line 59 of file qfbbackingstore.cpp.

References mImageMutex, and QMutex::unlock().

Referenced by QFbScreen::doRedraw(), and endPaint().

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Friends And Related Symbol Documentation

◆ QFbWindow

friend class QFbWindow

friend

Definition at line 49 of file qfbbackingstore_p.h.

Member Data Documentation

◆ mImage

QImage QFbBackingStore::mImage

protected

Definition at line 51 of file qfbbackingstore_p.h.

Referenced by beginPaint(), image(), paintDevice(), resize(), and toImage().

◆ mImageMutex

QMutex QFbBackingStore::mImageMutex

protected

Definition at line 52 of file qfbbackingstore_p.h.

Referenced by lock(), and unlock().

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

qtbase/src/platformsupport/fbconvenience/qfbbackingstore_p.h (05fc3aef53348fb58be6308076e000825b704e58)
qtbase/src/platformsupport/fbconvenience/qfbbackingstore.cpp (05fc3aef53348fb58be6308076e000825b704e58)

Public Member Functions

Protected Attributes

Friends

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QFbBackingStore()

◆ ~QFbBackingStore()

Member Function Documentation

◆ beginPaint()

◆ endPaint()

◆ flush()

◆ image()

◆ lock()

◆ paintDevice()

◆ resize()

◆ toImage()

◆ unlock()

Friends And Related Symbol Documentation

◆ QFbWindow

Member Data Documentation

◆ mImage

◆ mImageMutex