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Diffstat (limited to 'src/gui/image/qvolatileimage.cpp')
| -rw-r--r-- | src/gui/image/qvolatileimage.cpp | 318 |
1 files changed, 318 insertions, 0 deletions
diff --git a/src/gui/image/qvolatileimage.cpp b/src/gui/image/qvolatileimage.cpp new file mode 100644 index 0000000..098e9a1 --- /dev/null +++ b/src/gui/image/qvolatileimage.cpp @@ -0,0 +1,318 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QtGui module 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 Technology Preview License Agreement accompanying +** this package. +** +** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qvolatileimage_p.h" +#include "qvolatileimagedata_p.h" +#include <QtGui/private/qpaintengine_raster_p.h> +#include <QtGui/private/qpixmapdata_p.h> + +QT_BEGIN_NAMESPACE + +class QVolatileImagePaintEnginePrivate : public QRasterPaintEnginePrivate +{ +public: + QVolatileImagePaintEnginePrivate() { } + QVolatileImage *img; +}; + +class QVolatileImagePaintEngine : public QRasterPaintEngine +{ + Q_DECLARE_PRIVATE(QVolatileImagePaintEngine) + +public: + QVolatileImagePaintEngine(QPaintDevice *device, QVolatileImage *img); + bool begin(QPaintDevice *device); + bool end(); + void drawPixmap(const QPointF &p, const QPixmap &pm); + void drawPixmap(const QRectF &r, const QPixmap &pm, const QRectF &sr); +}; + +QVolatileImage::QVolatileImage() + : d(new QVolatileImageData) +{ +} + +QVolatileImage::QVolatileImage(int w, int h, QImage::Format format) + : d(new QVolatileImageData(w, h, format)) +{ +} + +QVolatileImage::QVolatileImage(const QImage &sourceImage) + : d(new QVolatileImageData(sourceImage)) +{ +} + +QVolatileImage::QVolatileImage(void *nativeImage, void *nativeMask) + : d(new QVolatileImageData(nativeImage, nativeMask)) +{ +} + +// Need non-inline, non-autogenerated copy ctor, dtor, op= to keep the +// fwd declared QSharedData working. + +QVolatileImage::QVolatileImage(const QVolatileImage &other) + : d(other.d) +{ +} + +QVolatileImage::~QVolatileImage() +{ +} + +QVolatileImage &QVolatileImage::operator=(const QVolatileImage &rhs) +{ + d = rhs.d; + return *this; +} + +bool QVolatileImage::isNull() const +{ + return d->image.isNull(); +} + +QImage::Format QVolatileImage::format() const +{ + return d->image.format(); +} + +int QVolatileImage::width() const +{ + return d->image.width(); +} + +int QVolatileImage::height() const +{ + return d->image.height(); +} + +int QVolatileImage::bytesPerLine() const +{ + return d->image.bytesPerLine(); +} + +int QVolatileImage::byteCount() const +{ + return d->image.byteCount(); +} + +int QVolatileImage::depth() const +{ + return d->image.depth(); +} + +bool QVolatileImage::hasAlphaChannel() const +{ + return d->image.hasAlphaChannel(); +} + +void QVolatileImage::beginDataAccess() const +{ + d->beginDataAccess(); +} + +void QVolatileImage::endDataAccess(bool readOnly) const +{ + d->endDataAccess(readOnly); +} + +/*! + Access to pixel data via bits() or constBits() should be guarded by + begin/endDataAccess(). + */ +uchar *QVolatileImage::bits() +{ + return d->image.bits(); +} + +const uchar *QVolatileImage::constBits() const +{ + return d->image.constBits(); +} + +bool QVolatileImage::ensureFormat(QImage::Format format) +{ + return d->ensureFormat(format); +} + +/*! + This will always perform a copy of the pixel data. + */ +QImage QVolatileImage::toImage() const +{ + d->beginDataAccess(); + QImage newImage = d->image.copy(); // no sharing allowed + d->endDataAccess(true); + return newImage; +} + +/*! + Returns a reference to the image that is potentially using some native + buffer internally. Access to the image's pixel data should be guarded by + begin/endDataAccess(). Use it when there is a need for QImage APIs not provided + by this class. The returned QImage must never be shared or assigned to. + */ +QImage &QVolatileImage::imageRef() // non-const, in order to cause a detach +{ + d->ensureImage(); + return d->image; +} + +void *QVolatileImage::duplicateNativeImage() const +{ + return d->duplicateNativeImage(); +} + +void QVolatileImage::setAlphaChannel(const QPixmap &alphaChannel) +{ + ensureFormat(QImage::Format_ARGB32_Premultiplied); + beginDataAccess(); + imageRef().setAlphaChannel(alphaChannel.toImage()); + endDataAccess(); + d->ensureImage(); +} + +void QVolatileImage::fill(uint pixelValue) +{ + beginDataAccess(); + imageRef().fill(pixelValue); + endDataAccess(); + d->ensureImage(); +} + +void QVolatileImage::copyFrom(QVolatileImage *source, const QRect &rect) +{ + if (source->isNull()) { + return; + } + QRect r = rect; + if (rect.isNull()) { + r = QRect(0, 0, source->width(), source->height()); + } + source->beginDataAccess(); + QImage &srcImgRef(source->imageRef()); + int srcbpl = srcImgRef.bytesPerLine(); + int srcbpp = srcImgRef.depth() / 8; + const uchar *sptr = srcImgRef.constBits() + r.y() * srcbpl; + beginDataAccess(); + QImage &dstImgRef(imageRef()); + int dstbpl = dstImgRef.bytesPerLine(); + uchar *dptr = dstImgRef.bits(); + for (int y = 0; y < r.height(); ++y) { + qMemCopy(dptr, sptr + r.x() * srcbpp, r.width() * srcbpp); + sptr += srcbpl; + dptr += dstbpl; + } + endDataAccess(); + source->endDataAccess(true); +} + +/*! + To be called from the PixmapData's paintEngine(). + */ +QPaintEngine *QVolatileImage::paintEngine() +{ + if (!d->pengine) { + d->pengine = new QVolatileImagePaintEngine(&imageRef(), this); + } + return d->pengine; +} + +QVolatileImagePaintEngine::QVolatileImagePaintEngine(QPaintDevice *device, + QVolatileImage *img) + : QRasterPaintEngine(*(new QVolatileImagePaintEnginePrivate), device) +{ + Q_D(QVolatileImagePaintEngine); + d->img = img; +} + +bool QVolatileImagePaintEngine::begin(QPaintDevice *device) +{ + Q_D(QVolatileImagePaintEngine); + d->img->beginDataAccess(); + return QRasterPaintEngine::begin(device); +} + +bool QVolatileImagePaintEngine::end() +{ + Q_D(QVolatileImagePaintEngine); + bool ret = QRasterPaintEngine::end(); + d->img->endDataAccess(); + return ret; +} + +// For non-RasterClass pixmaps drawPixmap() would call toImage() which is slow in +// our case. Therefore drawPixmap() is rerouted to drawImage(). + +void QVolatileImagePaintEngine::drawPixmap(const QPointF &p, const QPixmap &pm) +{ +#ifdef Q_OS_SYMBIAN + void *nativeData = pm.pixmapData()->toNativeType(QPixmapData::VolatileImage); + if (nativeData) { + QVolatileImage *img = static_cast<QVolatileImage *>(nativeData); + img->beginDataAccess(); + QRasterPaintEngine::drawImage(p, img->imageRef()); + img->endDataAccess(true); + } else { + QRasterPaintEngine::drawPixmap(p, pm); + } +#else + QRasterPaintEngine::drawPixmap(p, pm); +#endif +} + +void QVolatileImagePaintEngine::drawPixmap(const QRectF &r, const QPixmap &pm, const QRectF &sr) +{ +#ifdef Q_OS_SYMBIAN + void *nativeData = pm.pixmapData()->toNativeType(QPixmapData::VolatileImage); + if (nativeData) { + QVolatileImage *img = static_cast<QVolatileImage *>(nativeData); + img->beginDataAccess(); + QRasterPaintEngine::drawImage(r, img->imageRef(), sr); + img->endDataAccess(true); + } else { + QRasterPaintEngine::drawPixmap(r, pm, sr); + } +#else + QRasterPaintEngine::drawPixmap(r, pm, sr); +#endif +} + +QT_END_NAMESPACE |