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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (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 http://www.qtsoftware.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qdirectfbpixmap.h"
#include "qdirectfbscreen.h"
#include "qdirectfbpaintengine.h"
#include <QtGui/qbitmap.h>
#include <directfb.h>
static int global_ser_no = 0;
QDirectFBPixmapData::QDirectFBPixmapData(PixelType pixelType)
: QPixmapData(pixelType, DirectFBClass),
engine(0), format(QImage::Format_Invalid), alpha(false)
{
setSerialNumber(0);
}
QDirectFBPixmapData::~QDirectFBPixmapData()
{
unlockDirectFB();
if (dfbSurface && QDirectFBScreen::instance())
screen->releaseDFBSurface(dfbSurface);
delete engine;
}
void QDirectFBPixmapData::resize(int width, int height)
{
if (width <= 0 || height <= 0) {
invalidate();
return;
}
format = screen->pixelFormat();
dfbSurface = QDirectFBScreen::instance()->createDFBSurface(QSize(width, height),
format,
QDirectFBScreen::TrackSurface);
alpha = false;
if (!dfbSurface) {
invalidate();
qWarning("QDirectFBPixmapData::resize(): Unable to allocate surface");
return;
}
setSerialNumber(++global_ser_no);
}
// mostly duplicated from qimage.cpp (QImageData::checkForAlphaPixels)
static bool checkForAlphaPixels(const QImage &img)
{
const uchar *bits = img.bits();
const int bytes_per_line = img.bytesPerLine();
const uchar *end_bits = bits + bytes_per_line;
const int width = img.width();
const int height = img.height();
switch (img.format()) {
case QImage::Format_Indexed8:
return img.hasAlphaChannel();
case QImage::Format_ARGB32:
case QImage::Format_ARGB32_Premultiplied:
for (int y=0; y<height; ++y) {
for (int x=0; x<width; ++x) {
if ((((uint *)bits)[x] & 0xff000000) != 0xff000000) {
return true;
}
}
bits += bytes_per_line;
}
break;
case QImage::Format_ARGB8555_Premultiplied:
case QImage::Format_ARGB8565_Premultiplied:
for (int y=0; y<height; ++y) {
while (bits < end_bits) {
if (bits[0] != 0) {
return true;
}
bits += 3;
}
bits = end_bits;
end_bits += bytes_per_line;
}
break;
case QImage::Format_ARGB6666_Premultiplied:
for (int y=0; y<height; ++y) {
while (bits < end_bits) {
if ((bits[0] & 0xfc) != 0) {
return true;
}
bits += 3;
}
bits = end_bits;
end_bits += bytes_per_line;
}
break;
case QImage::Format_ARGB4444_Premultiplied:
for (int y=0; y<height; ++y) {
while (bits < end_bits) {
if ((bits[0] & 0xf0) != 0) {
return true;
}
bits += 2;
}
bits = end_bits;
end_bits += bytes_per_line;
}
break;
default:
break;
}
return false;
}
bool QDirectFBPixmapData::hasAlphaChannel(const QImage &img)
{
#ifndef QT_NO_DIRECTFB_OPAQUE_DETECTION
return ::checkForAlphaPixels(img);
#else
return img.hasAlphaChannel();
#endif
}
void QDirectFBPixmapData::fromImage(const QImage &i,
Qt::ImageConversionFlags flags)
{
#ifdef QT_NO_DIRECTFB_OPAQUE_DETECTION
Q_UNUSED(flags);
#endif
const QImage img = (i.depth() == 1 ? i.convertToFormat(screen->alphaPixmapFormat()) : i);
if (img.hasAlphaChannel()
#ifndef QT_NO_DIRECTFB_OPAQUE_DETECTION
&& (flags & Qt::NoOpaqueDetection || QDirectFBPixmapData::hasAlphaChannel(img))
#endif
) {
alpha = true;
format = screen->alphaPixmapFormat();
} else {
alpha = false;
format = screen->pixelFormat();
}
dfbSurface = screen->copyToDFBSurface(img, format,
QDirectFBScreen::TrackSurface);
if (!dfbSurface) {
qWarning("QDirectFBPixmapData::fromImage()");
invalidate();
return;
}
setSerialNumber(++global_ser_no);
}
void QDirectFBPixmapData::copy(const QPixmapData *data, const QRect &rect)
{
if (data->classId() != DirectFBClass) {
QPixmapData::copy(data, rect);
return;
}
unlockDirectFB();
IDirectFBSurface *src = static_cast<const QDirectFBPixmapData*>(data)->directFBSurface();
alpha = data->hasAlphaChannel();
format = (alpha
? QDirectFBScreen::instance()->alphaPixmapFormat()
: QDirectFBScreen::instance()->pixelFormat());
dfbSurface = screen->createDFBSurface(rect.size(), format,
QDirectFBScreen::TrackSurface);
if (!dfbSurface) {
qWarning("QDirectFBPixmapData::copy()");
invalidate();
return;
}
if (alpha) {
dfbSurface->Clear(dfbSurface, 0, 0, 0, 0);
dfbSurface->SetBlittingFlags(dfbSurface, DSBLIT_BLEND_ALPHACHANNEL);
} else {
dfbSurface->SetBlittingFlags(dfbSurface, DSBLIT_NOFX);
}
const DFBRectangle blitRect = { rect.x(), rect.y(),
rect.width(), rect.height() };
DFBResult result = dfbSurface->Blit(dfbSurface, src, &blitRect, 0, 0);
#if (Q_DIRECTFB_VERSION >= 0x010000)
dfbSurface->ReleaseSource(dfbSurface);
#endif
if (result != DFB_OK) {
DirectFBError("QDirectFBPixmapData::copy()", result);
invalidate();
return;
}
setSerialNumber(++global_ser_no);
}
static inline bool isOpaqueFormat(QImage::Format format)
{
switch (format) {
case QImage::Format_RGB32:
case QImage::Format_RGB16:
case QImage::Format_RGB666:
case QImage::Format_RGB555:
case QImage::Format_RGB888:
case QImage::Format_RGB444:
return true;
default:
break;
}
return false;
}
void QDirectFBPixmapData::fill(const QColor &color)
{
if (!serialNumber())
return;
Q_ASSERT(dfbSurface);
alpha = (color.alpha() < 255);
if (alpha && ::isOpaqueFormat(format)) {
QSize size;
dfbSurface->GetSize(dfbSurface, &size.rwidth(), &size.rheight());
screen->releaseDFBSurface(dfbSurface);
format = screen->alphaPixmapFormat();
dfbSurface = screen->createDFBSurface(size, screen->alphaPixmapFormat(), QDirectFBScreen::TrackSurface);
setSerialNumber(++global_ser_no);
if (!dfbSurface) {
qWarning("QDirectFBPixmapData::fill()");
invalidate();
return;
}
}
dfbSurface->Clear(dfbSurface, color.red(), color.green(), color.blue(), color.alpha());
}
QPixmap QDirectFBPixmapData::transformed(const QTransform &transform,
Qt::TransformationMode mode) const
{
QDirectFBPixmapData *that = const_cast<QDirectFBPixmapData*>(this);
if (!dfbSurface || transform.type() != QTransform::TxScale
|| mode != Qt::FastTransformation)
{
const QImage *image = that->buffer();
Q_ASSERT(image);
const QImage transformed = image->transformed(transform, mode);
that->unlockDirectFB();
QDirectFBPixmapData *data = new QDirectFBPixmapData(QPixmapData::PixmapType);
data->fromImage(transformed, Qt::AutoColor);
return QPixmap(data);
}
that->unlockDirectFB();
int w, h;
dfbSurface->GetSize(dfbSurface, &w, &h);
const QSize size = transform.mapRect(QRect(0, 0, w, h)).size();
if (size.isEmpty())
return QPixmap();
QDirectFBPixmapData *data = new QDirectFBPixmapData(QPixmapData::PixmapType);
DFBSurfaceBlittingFlags flags = DSBLIT_NOFX;
data->alpha = alpha;
if (alpha) {
flags = DSBLIT_BLEND_ALPHACHANNEL;
}
data->dfbSurface = screen->createDFBSurface(size,
format,
QDirectFBScreen::TrackSurface);
if (flags & DSBLIT_BLEND_ALPHACHANNEL) {
data->dfbSurface->Clear(data->dfbSurface, 0, 0, 0, 0);
}
data->dfbSurface->SetBlittingFlags(data->dfbSurface, flags);
const DFBRectangle destRect = { 0, 0, size.width(), size.height() };
data->dfbSurface->StretchBlit(data->dfbSurface, dfbSurface, 0, &destRect);
#if (Q_DIRECTFB_VERSION >= 0x010000)
data->dfbSurface->ReleaseSource(data->dfbSurface);
#endif
return QPixmap(data);
}
QImage QDirectFBPixmapData::toImage() const
{
if (!dfbSurface)
return QImage();
#if 0
// In later versions of DirectFB one can set a flag to tell
// DirectFB not to move the surface to videomemory. When that
// happens we can use this (hopefully faster) codepath
#ifndef QT_NO_DIRECTFB_PREALLOCATED
QImage ret(size(), QDirectFBScreen::getImageFormat(dfbSurface));
if (IDirectFBSurface *imgSurface = screen->createDFBSurface(ret, QDirectFBScreen::DontTrackSurface)) {
if (hasAlphaChannel()) {
imgSurface->SetBlittingFlags(imgSurface, DSBLIT_BLEND_ALPHACHANNEL);
imgSurface->Clear(imgSurface, 0, 0, 0, 0);
} else {
imgSurface->SetBlittingFlags(imgSurface, DSBLIT_NOFX);
}
imgSurface->Blit(imgSurface, dfbSurface, 0, 0, 0);
#if (Q_DIRECTFB_VERSION >= 0x010000)
imgSurface->ReleaseSource(imgSurface);
#endif
imgSurface->Release(imgSurface);
return ret;
}
#endif
#endif
QDirectFBPixmapData *that = const_cast<QDirectFBPixmapData*>(this);
const QImage *img = that->buffer();
return img->copy();
}
QPaintEngine *QDirectFBPixmapData::paintEngine() const
{
if (!engine) {
// QDirectFBPixmapData is also a QCustomRasterPaintDevice, so pass
// that to the paint engine:
QDirectFBPixmapData *that = const_cast<QDirectFBPixmapData*>(this);
that->engine = new QDirectFBPaintEngine(that);
}
return engine;
}
QImage *QDirectFBPixmapData::buffer()
{
lockDirectFB(DSLF_READ|DSLF_WRITE);
return lockedImage;
}
QImage * QDirectFBPixmapData::buffer(DFBSurfaceLockFlags lockFlags)
{
lockDirectFB(lockFlags);
return lockedImage;
}
void QDirectFBPixmapData::invalidate()
{
setSerialNumber(0);
alpha = false;
format = QImage::Format_Invalid;
}
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