QDirectFbBackingStore Class Reference

#include <qdirectfbbackingstore.h>

Inheritance diagram for QDirectFbBackingStore:

Collaboration diagram for QDirectFbBackingStore:

Public Member Functions
	QDirectFbBackingStore (QWindow *window)
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 &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.
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 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 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
void	surfaceAboutToBeDestroyed ()
void	graphicsDeviceReportedLost ()

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 16 of file qdirectfbbackingstore.h.

Constructor & Destructor Documentation

QDirectFbBackingStore()

QT_BEGIN_NAMESPACE QDirectFbBackingStore::QDirectFbBackingStore

(

QWindow *

window

)

Definition at line 15 of file qdirectfbbackingstore.cpp.

References QScopedPointer< T, Cleanup >::data(), QDirectFBPointer< T >::outPtr(), QScopedPointer< T, Cleanup >::reset(), QBlittablePlatformPixmap::setBlittable(), QWindow::size(), and QPlatformBackingStore::window().

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Member Function Documentation

flush()

void QDirectFbBackingStore::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 33 of file qdirectfbbackingstore.cpp.

References QBlittablePlatformPixmap::blittable(), QScopedPointer< T, Cleanup >::data(), rect, and QBlittable::unlock().

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paintDevice()

QPaintDevice * QDirectFbBackingStore::paintDevice ( )

overridevirtual

Implement this function to return the appropriate paint device.

Implements QPlatformBackingStore.

Definition at line 28 of file qdirectfbbackingstore.cpp.

References QScopedPointer< T, Cleanup >::data().

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resize()

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

overridevirtual

Implements QPlatformBackingStore.

Definition at line 43 of file qdirectfbbackingstore.cpp.

References QScopedPointer< T, Cleanup >::data(), QPlatformPixmap::height(), Q_UNUSED, QBlittablePlatformPixmap::setBlittable(), and QPlatformPixmap::width().

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scroll()

bool QDirectFbBackingStore::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 63 of file qdirectfbbackingstore.cpp.

References area(), QBlittablePlatformPixmap::blittable(), QScopedPointer< T, Cleanup >::data(), rect, scrollSurface(), and QBlittable::unlock().

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toImage()

QImage QDirectFbBackingStore::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 79 of file qdirectfbbackingstore.cpp.

References QScopedPointer< T, Cleanup >::data(), and QPixmap::toImage().

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

• qtbase/src/plugins/platforms/directfb/qdirectfbbackingstore.h (d86ab16a86ec4d6fb92855a3c9913b6b74b6bb0f)
• qtbase/src/plugins/platforms/directfb/qdirectfbbackingstore.cpp (05fc3aef53348fb58be6308076e000825b704e58)