QDirectFBPaintDevice Class Reference

#include <qdirectfbpaintdevice.h>

Inheritance diagram for QDirectFBPaintDevice:

Public Functions
int	bytesPerLine () const
	Returns the number of bytes per line in the framebuffer. More...
virtual IDirectFBSurface *	directFBSurface () const
QImage::Format	format () const
	Returns the format of the device's memory buffet. More...
DFBSurfaceLockFlags	lockFlags () const
bool	lockSurface (DFBSurfaceLockFlags lockFlags)
void *	memory () const
	Returns a pointer to the paint device's memory buffer, or 0 if no such buffer exists. More...
int	metric (QPaintDevice::PaintDeviceMetric metric) const
	Reimplemented Function More...
QPaintEngine *	paintEngine () const
QSize	size () const
void	unlockSurface ()
	~QDirectFBPaintDevice ()
Public Functions inherited from QCustomRasterPaintDevice
int	devType () const
	QCustomRasterPaintDevice (QWidget *w)
	Constructs a custom raster based paint device for the given top-level widget. More...
Public Functions inherited from QPaintDevice
int	colorCount () const
int	depth () const
virtual HDC	getDC () const
int	height () const
int	heightMM () const
int	logicalDpiX () const
int	logicalDpiY () const
QT_DEPRECATED int	numColors () const
bool	paintingActive () const
int	physicalDpiX () const
int	physicalDpiY () const
virtual void	releaseDC (HDC hdc) const
int	width () const
int	widthMM () const
virtual	~QPaintDevice ()

Protected Functions
int	dotsPerMeterX () const
int	dotsPerMeterY () const
	QDirectFBPaintDevice (QDirectFBScreen *scr)
Protected Functions inherited from QPaintDevice
	QPaintDevice ()

Protected Variables
int	bpl
IDirectFBSurface *	dfbSurface
QDirectFBPaintEngine *	engine
QImage::Format	imageFormat
QImage	lockedImage
DFBSurfaceLockFlags	lockFlgs
uchar *	mem
QDirectFBScreen *	screen
Protected Variables inherited from QPaintDevice
ushort	painters

Additional Inherited Members
Public Types inherited from QPaintDevice
enum	PaintDeviceMetric {   PdmWidth = 1, PdmHeight, PdmWidthMM, PdmHeightMM,   PdmNumColors, PdmDepth, PdmDpiX, PdmDpiY,   PdmPhysicalDpiX, PdmPhysicalDpiY }
Static Public Functions inherited from QPaintDevice
static QWSDisplay *	qwsDisplay ()
Related Functions inherited from QPaintDevice
const Q_GUI_EXPORT QX11Info *	qt_x11Info (const QPaintDevice *pd)
	Returns the QX11Info structure for the pd paint device. More...

Detailed Description

Definition at line 58 of file qdirectfbpaintdevice.h.

Constructors and Destructors

~QDirectFBPaintDevice()

QDirectFBPaintDevice::~QDirectFBPaintDevice

(

)

Definition at line 60 of file qdirectfbpaintdevice.cpp.

{
    if (QDirectFBScreen::instance()) {
        unlockSurface();
#ifdef QT_DIRECTFB_SUBSURFACE
        releaseSubSurface();
#endif
        if (dfbSurface) {
            screen->releaseDFBSurface(dfbSurface);
        }
    }
    delete engine;
}

QDirectFBPaintDevice()

QDirectFBPaintDevice::QDirectFBPaintDevice ( QDirectFBScreen *  scr )

protected

Definition at line 50 of file qdirectfbpaintdevice.cpp.

Referenced by lockFlags().

    : QCustomRasterPaintDevice(0), dfbSurface(0), screen(scr),
      bpl(-1), lockFlgs(DFBSurfaceLockFlags(0)), mem(0), engine(0), imageFormat(QImage::Format_Invalid)
{
#ifdef QT_DIRECTFB_SUBSURFACE
    subSurface = 0;
    syncPending = false;
#endif
}

Functions

bytesPerLine()

int QDirectFBPaintDevice::bytesPerLine ( ) const

virtual

Returns the number of bytes per line in the framebuffer.

Note that this number might be larger than the framebuffer width.

Reimplemented from QCustomRasterPaintDevice.

Definition at line 143 of file qdirectfbpaintdevice.cpp.

{
    Q_ASSERT(!mem || bpl != -1);
    return bpl;
}

directFBSurface()

IDirectFBSurface * QDirectFBPaintDevice::directFBSurface ( ) const

virtual

Reimplemented in QDirectFBWindowSurface.

Definition at line 74 of file qdirectfbpaintdevice.cpp.

Referenced by QDirectFBPixmapData::copy(), QDirectFBPaintEnginePrivate::drawTiledPixmap(), and qt_directfb_surface_for_pixmap().

{
    return dfbSurface;
}

dotsPerMeterX()

int QDirectFBPaintDevice::dotsPerMeterX ( ) const

inlineprotected

Definition at line 78 of file qdirectfbpaintdevice.h.

Referenced by metric().

    {
        return (screen->deviceWidth() * 1000) / screen->physicalWidth();
    }

dotsPerMeterY()

int QDirectFBPaintDevice::dotsPerMeterY ( ) const

inlineprotected

Definition at line 82 of file qdirectfbpaintdevice.h.

Referenced by metric().

    {
        return (screen->deviceHeight() * 1000) / screen->physicalHeight();
    }

format()

QImage::Format QDirectFBPaintDevice::format ( ) const

virtual

Returns the format of the device's memory buffet.

The default format is QImage::Format_ARGB32_Premultiplied. The only other valid format is QImage::Format_RGB16.

Reimplemented from QCustomRasterPaintDevice.

Definition at line 138 of file qdirectfbpaintdevice.cpp.

Referenced by QDirectFBPixmapData::fromFile().

{
    return imageFormat;
}

lockFlags()

DFBSurfaceLockFlags QDirectFBPaintDevice::lockFlags ( ) const

inline

Definition at line 74 of file qdirectfbpaintdevice.h.

Referenced by QDirectFBPixmapData::copy(), lockSurface(), and QDirectFBPixmapData::transformed().

{ return lockFlgs; }

lockSurface()

bool QDirectFBPaintDevice::lockSurface

(

DFBSurfaceLockFlags

lockFlags

)

Definition at line 79 of file qdirectfbpaintdevice.cpp.

Referenced by QDirectFBPixmapData::buffer(), and QDirectFBPaintEnginePrivate::lock().

{
    if (lockFlgs && (lockFlags & ~lockFlgs))
        unlockSurface();
    if (!mem) {
        Q_ASSERT(dfbSurface);
#ifdef QT_DIRECTFB_SUBSURFACE
        if (!subSurface) {
            DFBResult result;
            subSurface = screen->getSubSurface(dfbSurface, QRect(), QDirectFBScreen::TrackSurface, &result);
            if (result != DFB_OK || !subSurface) {
                DirectFBError("Couldn't create sub surface", result);
                return false;
            }
        }
        IDirectFBSurface *surface = subSurface;
#else
        IDirectFBSurface *surface = dfbSurface;
#endif
        Q_ASSERT(surface);
        mem = QDirectFBScreen::lockSurface(surface, lockFlags, &bpl);
        lockFlgs = lockFlags;
        Q_ASSERT(mem);
        Q_ASSERT(bpl > 0);
        const QSize s = size();
        lockedImage = QImage(mem, s.width(), s.height(), bpl,
                             QDirectFBScreen::getImageFormat(dfbSurface));
        return true;
    }
#ifdef QT_DIRECTFB_SUBSURFACE
    if (syncPending) {
        syncPending = false;
        screen->waitIdle();
    }
#endif
    return false;
}

memory()

void * QDirectFBPaintDevice::memory ( ) const

virtual

Returns a pointer to the paint device's memory buffer, or 0 if no such buffer exists.

Reimplemented from QCustomRasterPaintDevice.

Definition at line 133 of file qdirectfbpaintdevice.cpp.

{
    return mem;
}

metric()

int QDirectFBPaintDevice::metric ( QPaintDevice::PaintDeviceMetric  m ) const

virtual

Reimplemented Function

Reimplemented from QCustomRasterPaintDevice.

Reimplemented in QDirectFBPixmapData.

Definition at line 156 of file qdirectfbpaintdevice.cpp.

Referenced by QDirectFBPixmapData::metric().

{
    if (!dfbSurface)
        return 0;

    switch (metric) {
    case QPaintDevice::PdmWidth:
    case QPaintDevice::PdmHeight:
        return (metric == PdmWidth ? size().width() : size().height());
    case QPaintDevice::PdmWidthMM:
        return (size().width() * 1000) / dotsPerMeterX();
    case QPaintDevice::PdmHeightMM:
        return (size().height() * 1000) / dotsPerMeterY();
    case QPaintDevice::PdmPhysicalDpiX:
    case QPaintDevice::PdmDpiX:
        return (dotsPerMeterX() * 254) / 10000; // 0.0254 meters-per-inch
    case QPaintDevice::PdmPhysicalDpiY:
    case QPaintDevice::PdmDpiY:
        return (dotsPerMeterY() * 254) / 10000; // 0.0254 meters-per-inch
    case QPaintDevice::PdmDepth:
        return QDirectFBScreen::depth(imageFormat);
    case QPaintDevice::PdmNumColors: {
        if (!lockedImage.isNull())
            return lockedImage.colorCount();

        DFBResult result;
        IDirectFBPalette *palette = 0;
        unsigned int numColors = 0;

        result = dfbSurface->GetPalette(dfbSurface, &palette);
        if ((result != DFB_OK) || !palette)
            return 0;

        result = palette->GetSize(palette, &numColors);
        palette->Release(palette);
        if (result != DFB_OK)
            return 0;

        return numColors;
    }
    default:
        qCritical("QDirectFBPaintDevice::metric(): Unhandled metric!");
        return 0;
    }
}

paintEngine()

QPaintEngine * QDirectFBPaintDevice::paintEngine ( ) const

virtual

Implements QPaintDevice.

Reimplemented in QDirectFBPixmapData.

Definition at line 202 of file qdirectfbpaintdevice.cpp.

Referenced by lockFlags().

{
    return engine;
}

size()

QSize QDirectFBPaintDevice::size ( ) const

virtual

Warning

This function is not part of the public interface.

Reimplemented from QCustomRasterPaintDevice.

Definition at line 149 of file qdirectfbpaintdevice.cpp.

Referenced by QDirectFBPixmapData::fill(), lockSurface(), metric(), and QDirectFBPixmapData::transformed().

{
    int w, h;
    dfbSurface->GetSize(dfbSurface, &w, &h);
    return QSize(w, h);
}

unlockSurface()

void QDirectFBPaintDevice::unlockSurface

(

)

Definition at line 117 of file qdirectfbpaintdevice.cpp.

Referenced by QDirectFBPixmapData::copy(), QDirectFBWindowSurface::endPaint(), lockSurface(), paintEngine(), QDirectFBWindowSurface::releaseSurface(), QDirectFBPixmapData::scroll(), QDirectFBPixmapData::transformed(), QDirectFBPaintEnginePrivate::unlock(), and ~QDirectFBPaintDevice().

{
    if (QDirectFBScreen::instance() && lockFlgs) {
#ifdef QT_DIRECTFB_SUBSURFACE
        IDirectFBSurface *surface = subSurface;
#else
        IDirectFBSurface *surface = dfbSurface;
#endif
        if (surface) {
            surface->Unlock(surface);
            lockFlgs = static_cast<DFBSurfaceLockFlags>(0);
            mem = 0;
        }
    }
}

Properties

bpl

int QDirectFBPaintDevice::bpl

protected

Definition at line 96 of file qdirectfbpaintdevice.h.

Referenced by bytesPerLine(), and lockSurface().

dfbSurface

IDirectFBSurface* QDirectFBPaintDevice::dfbSurface

protected

Definition at line 87 of file qdirectfbpaintdevice.h.

Referenced by QDirectFBWindowSurface::beginPaint(), QDirectFBPixmapData::copy(), QDirectFBWindowSurface::createWindow(), directFBSurface(), QDirectFBWindowSurface::directFBSurface(), QDirectFBPixmapData::fill(), QDirectFBWindowSurface::flush(), QDirectFBPixmapData::fromDataBufferDescription(), QDirectFBPixmapData::fromImage(), QDirectFBPixmapData::invalidate(), lockSurface(), metric(), QDirectFBWindowSurface::releaseSurface(), QDirectFBPixmapData::resize(), QDirectFBWindowSurface::scroll(), QDirectFBPixmapData::scroll(), QDirectFBWindowSurface::setGeometry(), QDirectFBWindowSurface::setPermanentState(), size(), QDirectFBWindowSurface::surfaceForWidget(), QDirectFBPixmapData::toImage(), QDirectFBPixmapData::transformed(), unlockSurface(), and ~QDirectFBPaintDevice().

engine

QDirectFBPaintEngine* QDirectFBPaintDevice::engine

protected

Definition at line 99 of file qdirectfbpaintdevice.h.

Referenced by QDirectFBWindowSurface::beginPaint(), paintEngine(), QDirectFBPixmapData::paintEngine(), QDirectFBWindowSurface::setGeometry(), and ~QDirectFBPaintDevice().

imageFormat

QImage::Format QDirectFBPaintDevice::imageFormat

protected

Definition at line 100 of file qdirectfbpaintdevice.h.

Referenced by QDirectFBPixmapData::copy(), QDirectFBWindowSurface::createWindow(), QDirectFBPixmapData::fill(), format(), QDirectFBPixmapData::fromDataBufferDescription(), QDirectFBPixmapData::fromImage(), QDirectFBPixmapData::invalidate(), metric(), QDirectFBPixmapData::pixelFormat(), QDirectFBPixmapData::resize(), QDirectFBWindowSurface::setGeometry(), and QDirectFBPixmapData::transformed().

lockedImage

QImage QDirectFBPaintDevice::lockedImage

protected

Definition at line 94 of file qdirectfbpaintdevice.h.

Referenced by QDirectFBPixmapData::buffer(), lockSurface(), and metric().

lockFlgs

DFBSurfaceLockFlags QDirectFBPaintDevice::lockFlgs

protected

Definition at line 97 of file qdirectfbpaintdevice.h.

Referenced by QDirectFBPixmapData::buffer(), lockFlags(), lockSurface(), and unlockSurface().

mem

uchar* QDirectFBPaintDevice::mem

protected

Definition at line 98 of file qdirectfbpaintdevice.h.

Referenced by bytesPerLine(), lockSurface(), memory(), and unlockSurface().

screen

QDirectFBScreen* QDirectFBPaintDevice::screen

protected

Definition at line 95 of file qdirectfbpaintdevice.h.

Referenced by QDirectFBPixmapData::copy(), QDirectFBWindowSurface::createWindow(), dotsPerMeterX(), dotsPerMeterY(), QDirectFBPixmapData::fill(), QDirectFBWindowSurface::flush(), QDirectFBPixmapData::fromDataBufferDescription(), QDirectFBPixmapData::fromImage(), QDirectFBPixmapData::invalidate(), lockSurface(), paintEngine(), QDirectFBWindowSurface::releaseSurface(), QDirectFBPixmapData::resize(), QDirectFBWindowSurface::setGeometry(), QDirectFBWindowSurface::setPermanentState(), QDirectFBPixmapData::toImage(), QDirectFBPixmapData::transformed(), and ~QDirectFBPaintDevice().

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

• /src/plugins/gfxdrivers/directfb/qdirectfbpaintdevice.h
• /src/plugins/gfxdrivers/directfb/qdirectfbpaintdevice.cpp