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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** 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, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, 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.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#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);
const TSize size = bitmap->SizeInPixels();
TInt err = newBitmap->Create(size, newMode);
if (err != KErrNone) {
qWarning("QVolatileImage: Failed to create new bitmap (w %d h %d dispmode %d err %d)",
size.iWidth, size.iHeight, newMode, err);
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:
qWarning("QVolatileImage: Unknown image format %d", format);
mode = ENone;
break;
}
return mode;
}
static CFbsBitmap *imageToBitmap(const QImage &image)
{
if (image.isNull()) {
return 0;
}
CFbsBitmap *bitmap = new CFbsBitmap;
TInt err = bitmap->Create(TSize(image.width(), image.height()),
format2TDisplayMode(image.format()));
if (err == 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 (w %d h %d fmt %d err %d)",
image.width(), image.height(), image.format(), err);
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;
TInt err = bitmap->Duplicate(sourceBitmap.Handle());
if (err != KErrNone) {
qWarning("QVolatileImage: Failed to duplicate source bitmap (%d)", err);
delete bitmap;
bitmap = 0;
}
return bitmap;
}
static CFbsBitmap *createBitmap(int w, int h, QImage::Format format)
{
CFbsBitmap *bitmap = new CFbsBitmap;
TInt err = bitmap->Create(TSize(w, h), format2TDisplayMode(format));
if (err != KErrNone) {
qWarning("QVolatileImage: Failed to create source bitmap (w %d h %d fmt %d err %d)",
w, h, format, err);
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);
image = sourceImage;
// The following is not mandatory, but we do it here to have a bitmap
// created always in order to reduce local heap usage.
ensureBitmap();
}
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 if (source->DisplayMode() == EGray2) {
// The pixels will be inverted, must make a copy.
bitmap = rasterizeBitmap(source, source->DisplayMode());
} 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()
{
if (!bitmap && !image.isNull()) {
bitmap = imageToBitmap(image);
updateImage();
}
}
QT_END_NAMESPACE
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