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Diffstat (limited to 'src/plugins/gfxdrivers/directfb/qdirectfbpaintdevice.cpp')
| -rw-r--r-- | src/plugins/gfxdrivers/directfb/qdirectfbpaintdevice.cpp | 201 |
1 files changed, 201 insertions, 0 deletions
diff --git a/src/plugins/gfxdrivers/directfb/qdirectfbpaintdevice.cpp b/src/plugins/gfxdrivers/directfb/qdirectfbpaintdevice.cpp new file mode 100644 index 0000000..6a41a24 --- /dev/null +++ b/src/plugins/gfxdrivers/directfb/qdirectfbpaintdevice.cpp @@ -0,0 +1,201 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the plugins of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain +** additional rights. These rights are described in the Nokia Qt LGPL +** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this +** package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef QT_NO_DIRECTFB + +#include "qdirectfbscreen.h" +#include "qdirectfbpaintdevice.h" + +QDirectFBPaintDevice::~QDirectFBPaintDevice() +{ + delete lockedImage; +} + + +IDirectFBSurface *QDirectFBPaintDevice::directFbSurface() const +{ + return dfbSurface; +} + + +// Locks the dfb surface and creates a QImage (lockedImage) from the pointer +void QDirectFBPaintDevice::lockDirectFB() { + + if (lockedImage) + return; // Already locked + + void *mem; + int w, h; + int bpl; + DFBSurfacePixelFormat format; + + DFBResult result = dfbSurface->Lock(dfbSurface, DSLF_WRITE, &mem, &bpl); + if (result != DFB_OK || !mem) { + DirectFBError("QDirectFBPixmapData::buffer()", result); + return; + } + + dfbSurface->GetSize(dfbSurface, &w, &h); + dfbSurface->GetPixelFormat(dfbSurface, &format); + + lockedImage = new QImage(static_cast<uchar*>(mem), w, h, bpl, + QDirectFBScreen::getImageFormat(format)); +} + + +void QDirectFBPaintDevice::unlockDirectFB() +{ + if (!lockedImage || !QDirectFBScreen::instance()) + return; + + dfbSurface->Unlock(dfbSurface); + delete lockedImage; + lockedImage = 0; +} + + +void* QDirectFBPaintDevice::memory() const +{ + QDirectFBPaintDevice* that = const_cast<QDirectFBPaintDevice*>(this); + that->lockDirectFB(); + Q_ASSERT(that->lockedImage); + return that->lockedImage->bits(); +} + + +QImage::Format QDirectFBPaintDevice::format() const +{ + DFBSurfacePixelFormat dfbFormat; + dfbSurface->GetPixelFormat(dfbSurface, &dfbFormat); + return QDirectFBScreen::getImageFormat(dfbFormat); +} + + +int QDirectFBPaintDevice::bytesPerLine() const +{ + // Can only get the stride when we lock the surface + QDirectFBPaintDevice* that = const_cast<QDirectFBPaintDevice*>(this); + that->lockDirectFB(); + Q_ASSERT(that->lockedImage); + return that->lockedImage->bytesPerLine(); +} + + +QSize QDirectFBPaintDevice::size() const +{ + int w, h; + dfbSurface->GetSize(dfbSurface, &w, &h); + return QSize(w, h); +} + + +int QDirectFBPaintDevice::metric(QPaintDevice::PaintDeviceMetric metric) const +{ + if (!dfbSurface) + return 0; + + int w, h; + dfbSurface->GetSize(dfbSurface, &w, &h); + + int dpmX, dpmY; // Dots-per-meter ;-) + + // Do some common calculations: + switch (metric) { + case QPaintDevice::PdmWidthMM: + case QPaintDevice::PdmPhysicalDpiX: + case QPaintDevice::PdmDpiX: + dpmX = (screen->deviceWidth() * 1000) / screen->physicalWidth(); + break; + case QPaintDevice::PdmHeightMM: + case QPaintDevice::PdmPhysicalDpiY: + case QPaintDevice::PdmDpiY: + dpmY = (screen->deviceHeight() * 1000) / screen->physicalHeight(); + break; + default: + break; + } + + // Now use those calculations + switch (metric) { + case QPaintDevice::PdmWidth: + return w; + case QPaintDevice::PdmHeight: + return h; + case QPaintDevice::PdmWidthMM: + return (w * 1000) / dpmX; + case QPaintDevice::PdmHeightMM: + return (h * 1000) / dpmY; + case QPaintDevice::PdmPhysicalDpiX: + case QPaintDevice::PdmDpiX: + return (dpmX * 254) / 10000; // 0.0254 meters-per-inch + case QPaintDevice::PdmPhysicalDpiY: + case QPaintDevice::PdmDpiY: + return (dpmY * 254) / 10000; // 0.0254 meters-per-inch + case QPaintDevice::PdmDepth: + DFBSurfacePixelFormat format; + dfbSurface->GetPixelFormat(dfbSurface, &format); + return QDirectFBScreen::depth(format); + case QPaintDevice::PdmNumColors: { + if (lockedImage) + return lockedImage->numColors(); + + 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; + } +} + +#endif |