diff options
Diffstat (limited to 'src/gui/image/qvolatileimagedata_symbian.cpp')
| -rw-r--r-- | src/gui/image/qvolatileimagedata_symbian.cpp | 473 |
1 files changed, 473 insertions, 0 deletions
diff --git a/src/gui/image/qvolatileimagedata_symbian.cpp b/src/gui/image/qvolatileimagedata_symbian.cpp new file mode 100644 index 0000000..d9c2ad4 --- /dev/null +++ b/src/gui/image/qvolatileimagedata_symbian.cpp @@ -0,0 +1,473 @@ +/**************************************************************************** +** +** 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 "qvolatileimagedata_p.h" +#include <fbs.h> +#include <QtGui/private/qt_s60_p.h> +#include <QtGui/qpaintengine.h> +#include <QtGui/private/qimage_p.h> + +QT_BEGIN_NAMESPACE + +static CFbsBitmap *rasterizeBitmap(CFbsBitmap *bitmap, TDisplayMode newMode) +{ + if (!bitmap) { + return 0; + } + QScopedPointer<CFbsBitmap> newBitmap(new CFbsBitmap); + if (newBitmap->Create(bitmap->SizeInPixels(), newMode) != KErrNone) { + qWarning("QVolatileImage: Failed to create new bitmap"); + return 0; + } + CFbsBitmapDevice *bitmapDevice = 0; + CFbsBitGc *bitmapGc = 0; + QT_TRAP_THROWING(bitmapDevice = CFbsBitmapDevice::NewL(newBitmap.data())); + QScopedPointer<CFbsBitmapDevice> bitmapDevicePtr(bitmapDevice); + QT_TRAP_THROWING(bitmapGc = CFbsBitGc::NewL()); + bitmapGc->Activate(bitmapDevice); + bitmapGc->BitBlt(TPoint(), bitmap); + delete bitmapGc; + return newBitmap.take(); +} + +static inline TDisplayMode format2TDisplayMode(QImage::Format format) +{ + TDisplayMode mode; + switch (format) { + case QImage::Format_MonoLSB: + mode = EGray2; + break; + case QImage::Format_Indexed8: + mode = EColor256; + break; + case QImage::Format_RGB444: + mode = EColor4K; + break; + case QImage::Format_RGB16: + mode = EColor64K; + break; + case QImage::Format_RGB888: + mode = EColor16M; + break; + case QImage::Format_RGB32: + mode = EColor16MU; + break; + case QImage::Format_ARGB32: + mode = EColor16MA; + break; + case QImage::Format_ARGB32_Premultiplied: + mode = Q_SYMBIAN_ECOLOR16MAP; + break; + default: + mode = ENone; + break; + } + return mode; +} + +static CFbsBitmap *imageToBitmap(const QImage &image) +{ + if (image.isNull()) { + return 0; + } + CFbsBitmap *bitmap = new CFbsBitmap; + if (bitmap->Create(TSize(image.width(), image.height()), + format2TDisplayMode(image.format())) == KErrNone) { + bitmap->BeginDataAccess(); + uchar *dptr = reinterpret_cast<uchar *>(bitmap->DataAddress()); + int bmpLineLen = bitmap->DataStride(); + int imgLineLen = image.bytesPerLine(); + if (bmpLineLen == imgLineLen) { + qMemCopy(dptr, image.constBits(), image.byteCount()); + } else { + int len = qMin(bmpLineLen, imgLineLen); + const uchar *sptr = image.constBits(); + for (int y = 0; y < image.height(); ++y) { + qMemCopy(dptr, sptr, len); + dptr += bmpLineLen; + sptr += imgLineLen; + } + } + bitmap->EndDataAccess(); + } else { + qWarning("QVolatileImage: Failed to create source bitmap"); + delete bitmap; + bitmap = 0; + } + return bitmap; +} + +static CFbsBitmap *copyData(const QVolatileImageData &source) +{ + source.beginDataAccess(); + CFbsBitmap *bmp = imageToBitmap(source.image); + source.endDataAccess(); + return bmp; +} + +static CFbsBitmap *convertData(const QVolatileImageData &source, QImage::Format newFormat) +{ + source.beginDataAccess(); + QImage img = source.image.convertToFormat(newFormat); + CFbsBitmap *bmp = imageToBitmap(img); + source.endDataAccess(); + return bmp; +} + +static CFbsBitmap *duplicateBitmap(const CFbsBitmap &sourceBitmap) +{ + CFbsBitmap *bitmap = new CFbsBitmap; + if (bitmap->Duplicate(sourceBitmap.Handle()) != KErrNone) { + qWarning("QVolatileImage: Failed to duplicate source bitmap"); + delete bitmap; + bitmap = 0; + } + return bitmap; +} + +static CFbsBitmap *createBitmap(int w, int h, QImage::Format format) +{ + CFbsBitmap *bitmap = new CFbsBitmap; + if (bitmap->Create(TSize(w, h), format2TDisplayMode(format)) != KErrNone) { + qWarning("QVolatileImage: Failed to create source bitmap %d,%d (%d)", w, h, format); + delete bitmap; + bitmap = 0; + } + return bitmap; +} + +static inline bool bitmapNeedsCopy(CFbsBitmap *bitmap) +{ + bool needsCopy = bitmap->IsCompressedInRAM(); +#ifdef Q_SYMBIAN_HAS_EXTENDED_BITMAP_TYPE + needsCopy |= (bitmap->ExtendedBitmapType() != KNullUid); +#endif + return needsCopy; +} + +static bool cleanup_function_registered = false; +static QVolatileImageData *firstImageData = 0; + +static void cleanup() +{ + if (RFbsSession::GetSession()) { + QVolatileImageData *imageData = firstImageData; + while (imageData) { + imageData->release(); + imageData = imageData->next; + } + } +} + +static void ensureCleanup() +{ + // Destroy all underlying bitmaps in a post routine to prevent panics. + // This is a must because CFbsBitmap destructor needs the fbs session, + // that was used to create the bitmap, to be open still. + if (!cleanup_function_registered) { + qAddPostRoutine(cleanup); + cleanup_function_registered = true; + } +} + +static void registerImageData(QVolatileImageData *imageData) +{ + ensureCleanup(); + imageData->next = firstImageData; + if (firstImageData) { + firstImageData->prev = imageData; + } + firstImageData = imageData; +} + +static void unregisterImageData(QVolatileImageData *imageData) +{ + if (imageData->prev) { + imageData->prev->next = imageData->next; + } else { + firstImageData = imageData->next; + } + if (imageData->next) { + imageData->next->prev = imageData->prev; + } +} + +QVolatileImageData::QVolatileImageData() + : next(0), prev(0), bitmap(0), pengine(0) +{ + registerImageData(this); +} + +QVolatileImageData::QVolatileImageData(int w, int h, QImage::Format format) + : next(0), prev(0), bitmap(0), pengine(0) +{ + registerImageData(this); + bitmap = createBitmap(w, h, format); + updateImage(); +} + +QVolatileImageData::QVolatileImageData(const QImage &sourceImage) + : next(0), prev(0), bitmap(0), pengine(0) +{ + registerImageData(this); + // Try being optimal: Defer the bitmap creation and pixel data copying + // to ensureBitmap() which will be called when there is a real need for + // the bitmap. + image = sourceImage; +} + +QVolatileImageData::QVolatileImageData(void *nativeImage, void *nativeMask) + : next(0), prev(0), bitmap(0), pengine(0) +{ + registerImageData(this); + if (nativeImage) { + CFbsBitmap *source = static_cast<CFbsBitmap *>(nativeImage); + CFbsBitmap *mask = static_cast<CFbsBitmap *>(nativeMask); + initWithBitmap(source); + if (mask) { + applyMask(mask); + } + } +} + +QVolatileImageData::QVolatileImageData(const QVolatileImageData &other) +{ + bitmap = 0; + pengine = 0; + next = prev = 0; + registerImageData(this); + if (!other.image.isNull()) { + bitmap = copyData(other); + updateImage(); + } +} + +QVolatileImageData::~QVolatileImageData() +{ + release(); + unregisterImageData(this); +} + +void QVolatileImageData::release() +{ + delete bitmap; + bitmap = 0; + delete pengine; + pengine = 0; +} + +void QVolatileImageData::beginDataAccess() const +{ + if (bitmap) { + bitmap->BeginDataAccess(); + } +} + +void QVolatileImageData::endDataAccess(bool readOnly) const +{ + if (bitmap) { + bitmap->EndDataAccess(readOnly); + } +} + +bool QVolatileImageData::ensureFormat(QImage::Format format) +{ + if (image.isNull()) { + return false; + } + if (image.format() != format) { + CFbsBitmap *newBitmap = convertData(*this, format); + if (newBitmap && newBitmap != bitmap) { + delete bitmap; + bitmap = newBitmap; + updateImage(); + } else { + return false; + } + } + return true; +} + +void *QVolatileImageData::duplicateNativeImage() const +{ + const_cast<QVolatileImageData *>(this)->ensureBitmap(); + if (bitmap) { + if (bitmap->DisplayMode() == EColor16M) { + // slow path: needs rgb swapping + beginDataAccess(); + QImage tmp = image.rgbSwapped(); + endDataAccess(true); + return imageToBitmap(tmp); + } else if (bitmap->DisplayMode() == EGray2) { + // slow path: needs inverting pixels + beginDataAccess(); + QImage tmp = image.copy(); + endDataAccess(true); + tmp.invertPixels(); + return imageToBitmap(tmp); + } else { + // fast path: just duplicate the bitmap + return duplicateBitmap(*bitmap); + } + } + return 0; +} + +void QVolatileImageData::updateImage() +{ + if (bitmap) { + TSize size = bitmap->SizeInPixels(); + beginDataAccess(); + // Use existing buffer, no copy. The data address never changes so it + // is enough to do this whenever we have a new CFbsBitmap. N.B. never + // use const uchar* here, that would create a read-only image data which + // would make a copy in detach() even when refcount is 1. + image = QImage(reinterpret_cast<uchar *>(bitmap->DataAddress()), + size.iWidth, size.iHeight, bitmap->DataStride(), + qt_TDisplayMode2Format(bitmap->DisplayMode())); + endDataAccess(true); + } else { + image = QImage(); + } +} + +void QVolatileImageData::initWithBitmap(CFbsBitmap *source) +{ + bool needsCopy = bitmapNeedsCopy(source); + if (source->DisplayMode() == EColor16M) { + // EColor16M is BGR + CFbsBitmap *unswappedBmp = source; + if (needsCopy) { + unswappedBmp = rasterizeBitmap(source, source->DisplayMode()); + } + unswappedBmp->BeginDataAccess(); + TSize sourceSize = unswappedBmp->SizeInPixels(); + QImage img((uchar *) unswappedBmp->DataAddress(), + sourceSize.iWidth, sourceSize.iHeight, unswappedBmp->DataStride(), + qt_TDisplayMode2Format(unswappedBmp->DisplayMode())); + img = img.rgbSwapped(); + unswappedBmp->EndDataAccess(true); + bitmap = imageToBitmap(img); + if (needsCopy) { + delete unswappedBmp; + } + } else if (needsCopy) { + // Rasterize extended and compressed bitmaps. + bitmap = rasterizeBitmap(source, EColor16MAP); + } else { + // Efficient path: no pixel data copying. Just duplicate. This of course + // means the original bitmap's data may get modified, but that's fine + // and is in accordance with the QPixmap::fromSymbianCFbsBitmap() docs. + bitmap = duplicateBitmap(*source); + } + updateImage(); + if (bitmap && bitmap->DisplayMode() == EGray2) { + // Symbian thinks set pixels are white/transparent, Qt thinks they are + // foreground/solid. Invert mono bitmaps so that masks work correctly. + beginDataAccess(); + image.invertPixels(); + endDataAccess(); + } +} + +void QVolatileImageData::applyMask(CFbsBitmap *mask) +{ + ensureFormat(QImage::Format_ARGB32_Premultiplied); + bool destroyMask = false; + if (bitmapNeedsCopy(mask)) { + mask = rasterizeBitmap(mask, EColor16MU); + if (!mask) { + return; + } + destroyMask = true; + } + mask->BeginDataAccess(); + TSize maskSize = mask->SizeInPixels(); + QImage maskImg((const uchar *) mask->DataAddress(), maskSize.iWidth, maskSize.iHeight, + mask->DataStride(), qt_TDisplayMode2Format(mask->DisplayMode())); + if (mask->DisplayMode() == EGray2) { + maskImg = maskImg.copy(); + maskImg.invertPixels(); + } + beginDataAccess(); + image.setAlphaChannel(maskImg); + endDataAccess(); + mask->EndDataAccess(true); + ensureImage(); + if (destroyMask) { + delete mask; + } +} + +void QVolatileImageData::ensureImage() +{ + if (bitmap && !image.isNull()) { + QImageData *imaged = image.data_ptr(); + if (imaged->ref != 1 || imaged->ro_data) { + // This is bad, the imagedata got shared somehow. Detach, in order to + // have the next check fail and thus have 'image' recreated. + beginDataAccess(); + image.detach(); + endDataAccess(true); + } + } + if (bitmap && image.constBits() != reinterpret_cast<const uchar *>(bitmap->DataAddress())) { + // Should not ever get here. If we do it means that either 'image' has + // been replaced with a copy (e.g. because some QImage API assigned a + // new, regular QImage to *this) or the bitmap's data address changed + // unexpectedly. + qWarning("QVolatileImageData: Ptr mismatch"); + // Recover by recreating the image so that it uses the bitmap as its buffer. + updateImage(); + } +} + +void QVolatileImageData::ensureBitmap() +{ + // Creates the bitmap from the image if not yet done. This case can happen + // only if we were constructed from a QImage. Otherwise this is a no-op. + if (!bitmap && !image.isNull()) { + bitmap = imageToBitmap(image); + updateImage(); + } +} + +QT_END_NAMESPACE |