QTraceWindowSurface Class Reference

Inheritance diagram for QTraceWindowSurface:

Public Functions
void	beginPaint (const QRegion &rgn)
	This function is called before painting onto the surface begins, with the region in which the painting will occur. More...
void	endPaint (const QRegion &rgn)
	This function is called after painting onto the surface has ended, with the region in which the painting was performed. More...
QPaintDevice *	paintDevice ()
	Implement this function to return the appropriate paint device. More...
	QTraceWindowSurface (QWidget *widget)
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. More...
	~QTraceWindowSurface ()
Public Functions inherited from QRasterWindowSurface
WindowSurfaceFeatures	features () const
void	flush (QWidget *widget, const QRegion &region, const QPoint &offset)
	Flushes the given region from the specified widget onto the screen. More...
	QRasterWindowSurface (QWidget *widget, bool setDefaultSurface=true)
void	setGeometry (const QRect &rect)
	Sets the currently allocated area to be the given rect. More...
	~QRasterWindowSurface ()
Public Functions inherited from QWindowSurface
virtual QImage *	buffer (const QWidget *widget)
	Returns a QImage pointer which represents the actual buffer the widget is drawn into or 0 if this is unavailable. More...
QRect	geometry () const
	Returns the currently allocated area on the screen. More...
virtual QPixmap	grabWidget (const QWidget *widget, const QRect &rectangle=QRect()) const
	Returns a QPixmap generated from the part of the backing store corresponding to widget. More...
bool	hasFeature (WindowSurfaceFeature feature) const
virtual QPoint	offset (const QWidget *widget) const
	Returns the offset of widget in the coordinates of this window surface. More...
	QWindowSurface (QWidget *window, bool setDefaultSurface=true)
	Constructs an empty surface for the given top-level window. More...
QRect	rect (const QWidget *widget) const
	Returns the rectangle for widget in the coordinates of this window surface. More...
void	setStaticContents (const QRegion &region)
QRegion	staticContents () const
QWidget *	window () const
	Returns a pointer to the top-level window associated with this surface. More...
virtual	~QWindowSurface ()
	Destroys this surface. More...

Properties
QPaintBuffer *	buffer
QList< QRegion >	updates
qulonglong	winId

Additional Inherited Members
Public Types inherited from QWindowSurface
enum	WindowSurfaceFeature { PartialUpdates = 0x00000001, PreservedContents = 0x00000002, StaticContents = 0x00000004, AllFeatures = 0xffffffff }
Protected Functions inherited from QWindowSurface
bool	hasStaticContents () const

Detailed Description

Definition at line 53 of file qgraphicssystem_trace.cpp.

Constructors and Destructors

QTraceWindowSurface()

QTraceWindowSurface::QTraceWindowSurface

(

QWidget *

widget

)

Definition at line 72 of file qgraphicssystem_trace.cpp.

Referenced by QTraceGraphicsSystem::createWindowSurface().

    : QRasterWindowSurface(widget)
    , buffer(0)
    , winId(0)
{
}

~QTraceWindowSurface()

QTraceWindowSurface::~QTraceWindowSurface

(

)

Definition at line 79 of file qgraphicssystem_trace.cpp.

{
    if (buffer) {
        QFile outputFile(QString(QLatin1String("qtgraphics-%0.trace")).arg(winId));
        if (outputFile.open(QIODevice::WriteOnly)) {
            QDataStream out(&outputFile);
            out.setFloatingPointPrecision(QDataStream::SinglePrecision);

            out.writeBytes("qttraceV2", 9);

            uint version = 1;

            out << version << *buffer << updates;
        }
        delete buffer;
    }
}

Functions

beginPaint()

void QTraceWindowSurface::beginPaint ( const QRegion &  region )

virtual

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 QRasterWindowSurface.

Definition at line 110 of file qgraphicssystem_trace.cpp.

{
    // ensure paint buffer is created
    paintDevice();
    buffer->beginNewFrame();

    QRasterWindowSurface::beginPaint(rgn);
}

endPaint()

void QTraceWindowSurface::endPaint ( const QRegion &  region )

virtual

This function is called after painting onto the surface has ended, with the region in which the painting was performed.

See also

beginPaint(), paintDevice()

Reimplemented from QWindowSurface.

Definition at line 119 of file qgraphicssystem_trace.cpp.

{
    QPainter p(QRasterWindowSurface::paintDevice());
    buffer->draw(&p, buffer->numFrames()-1);
    p.end();

    winId = (qulonglong)window()->winId();

    updates << rgn;

    QRasterWindowSurface::endPaint(rgn);
}

paintDevice()

QPaintDevice * QTraceWindowSurface::paintDevice ( )

virtual

Implement this function to return the appropriate paint device.

Reimplemented from QRasterWindowSurface.

Definition at line 97 of file qgraphicssystem_trace.cpp.

Referenced by beginPaint().

{
    if (!buffer) {
        buffer = new QPaintBuffer;
#ifdef Q_WS_QPA
        buffer->setBoundingRect(QRect(QPoint(), size()));
#else
        buffer->setBoundingRect(geometry());
#endif
    }
    return buffer;
}

scroll()

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

virtual

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 QRasterWindowSurface.

Definition at line 132 of file qgraphicssystem_trace.cpp.

{
    // TODO: scrolling should also be streamed and replayed
    // to test scrolling performance
    return false;
}

Properties

buffer

QPaintBuffer* QTraceWindowSurface::buffer

private

Definition at line 66 of file qgraphicssystem_trace.cpp.

Referenced by beginPaint(), endPaint(), paintDevice(), and ~QTraceWindowSurface().

updates

QList<QRegion> QTraceWindowSurface::updates

private

Definition at line 67 of file qgraphicssystem_trace.cpp.

Referenced by endPaint(), and ~QTraceWindowSurface().

winId

qulonglong QTraceWindowSurface::winId

private

Definition at line 69 of file qgraphicssystem_trace.cpp.

Referenced by endPaint(), and ~QTraceWindowSurface().

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

• /src/plugins/graphicssystems/trace/qgraphicssystem_trace.cpp