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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 QtOpenVG 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 "qpixmapdata_vg_p.h"
#include "qpaintengine_vg_p.h"
#include <QtGui/private/qdrawhelper_p.h>
#if !defined(QT_NO_EGL)
#include <QtGui/private/qegl_p.h>
#endif
#include "qvg_p.h"
#include "qvgimagepool_p.h"
#include <QBuffer>
#include <QImageReader>
#include <QtGui/private/qimage_p.h>
#include <QtGui/private/qnativeimagehandleprovider_p.h>
#include <QtGui/private/qfont_p.h>
QT_BEGIN_NAMESPACE
static int qt_vg_pixmap_serial = 0;
QVGPixmapData::QVGPixmapData(PixelType type)
: QPixmapData(type, OpenVGClass)
{
Q_ASSERT(type == QPixmapData::PixmapType);
vgImage = VG_INVALID_HANDLE;
vgImageOpacity = VG_INVALID_HANDLE;
cachedOpacity = 1.0f;
recreate = true;
inImagePool = false;
inLRU = false;
#if defined(Q_OS_SYMBIAN)
nativeImageHandleProvider = 0;
nativeImageHandle = 0;
#endif
#if !defined(QT_NO_EGL)
context = 0;
qt_vg_register_pixmap(this);
#endif
updateSerial();
}
QVGPixmapData::~QVGPixmapData()
{
destroyImageAndContext();
#if !defined(QT_NO_EGL)
qt_vg_unregister_pixmap(this);
#endif
}
void QVGPixmapData::destroyImages()
{
if (inImagePool) {
QVGImagePool *pool = QVGImagePool::instance();
if (vgImage != VG_INVALID_HANDLE)
pool->releaseImage(this, vgImage);
if (vgImageOpacity != VG_INVALID_HANDLE)
pool->releaseImage(this, vgImageOpacity);
} else {
if (vgImage != VG_INVALID_HANDLE)
vgDestroyImage(vgImage);
if (vgImageOpacity != VG_INVALID_HANDLE)
vgDestroyImage(vgImageOpacity);
}
vgImage = VG_INVALID_HANDLE;
vgImageOpacity = VG_INVALID_HANDLE;
inImagePool = false;
#if defined(Q_OS_SYMBIAN)
releaseNativeImageHandle();
#endif
}
void QVGPixmapData::destroyImageAndContext()
{
if (vgImage != VG_INVALID_HANDLE) {
// We need to have a context current to destroy the image.
#if !defined(QT_NO_EGL)
if (!context)
context = qt_vg_create_context(0, QInternal::Pixmap);
if (context->isCurrent()) {
destroyImages();
} else {
// We don't currently have a widget surface active, but we
// need a surface to make the context current. So use the
// shared pbuffer surface instead.
context->makeCurrent(qt_vg_shared_surface());
destroyImages();
context->lazyDoneCurrent();
}
#else
destroyImages();
#endif
} else {
#if defined(Q_OS_SYMBIAN)
releaseNativeImageHandle();
#endif
}
#if !defined(QT_NO_EGL)
if (context) {
qt_vg_destroy_context(context, QInternal::Pixmap);
context = 0;
}
#endif
recreate = true;
}
QPixmapData *QVGPixmapData::createCompatiblePixmapData() const
{
return new QVGPixmapData(pixelType());
}
bool QVGPixmapData::isValid() const
{
return (w > 0 && h > 0);
}
void QVGPixmapData::updateSerial()
{
setSerialNumber(++qt_vg_pixmap_serial);
}
void QVGPixmapData::resize(int wid, int ht)
{
if (w == wid && h == ht) {
updateSerial();
return;
}
w = wid;
h = ht;
d = 32; // We always use ARGB_Premultiplied for VG pixmaps.
is_null = (w <= 0 || h <= 0);
source = QVolatileImage();
recreate = true;
updateSerial();
}
void QVGPixmapData::fromImage(const QImage &image, Qt::ImageConversionFlags flags)
{
if (image.isNull())
return;
QImage img = image;
createPixmapForImage(img, flags, false);
}
void QVGPixmapData::fromImageReader(QImageReader *imageReader,
Qt::ImageConversionFlags flags)
{
QImage image = imageReader->read();
if (image.isNull())
return;
createPixmapForImage(image, flags, true);
}
bool QVGPixmapData::fromFile(const QString &filename, const char *format,
Qt::ImageConversionFlags flags)
{
QImage image = QImageReader(filename, format).read();
if (image.isNull())
return false;
createPixmapForImage(image, flags, true);
return !isNull();
}
bool QVGPixmapData::fromData(const uchar *buffer, uint len, const char *format,
Qt::ImageConversionFlags flags)
{
QByteArray a = QByteArray::fromRawData(reinterpret_cast<const char *>(buffer), len);
QBuffer b(&a);
b.open(QIODevice::ReadOnly);
QImage image = QImageReader(&b, format).read();
if (image.isNull())
return false;
createPixmapForImage(image, flags, true);
return !isNull();
}
QImage::Format QVGPixmapData::idealFormat(QImage *image, Qt::ImageConversionFlags flags) const
{
QImage::Format format = sourceFormat();
int d = image->depth();
if (d == 1 || d == 16 || d == 24 || (d == 32 && !image->hasAlphaChannel()))
format = QImage::Format_RGB32;
else if (!(flags & Qt::NoOpaqueDetection) && image->data_ptr()->checkForAlphaPixels())
format = sourceFormat();
else
format = image->hasAlphaChannel() ? sourceFormat() : QImage::Format_RGB32;
return format;
}
void QVGPixmapData::createPixmapForImage(QImage &image, Qt::ImageConversionFlags flags, bool inPlace)
{
resize(image.width(), image.height());
QImage::Format format = idealFormat(&image, flags);
if (inPlace && image.data_ptr()->convertInPlace(format, flags)) {
source = QVolatileImage(image);
} else {
QImage convertedImage = image.convertToFormat(format);
// convertToFormat won't detach the image if format stays the
// same. Detaching is needed to prevent issues with painting
// onto this QPixmap later on.
convertedImage.detach();
if (convertedImage.isNull())
qWarning("QVGPixmapData: Failed to convert image data (out of memory? try increasing heap size)");
source = QVolatileImage(convertedImage);
}
recreate = true;
}
void QVGPixmapData::fill(const QColor &color)
{
if (!isValid())
return;
forceToImage();
if (source.depth() == 1) {
// Pick the best approximate color in the image's colortable.
int gray = qGray(color.rgba());
if (qAbs(qGray(source.imageRef().color(0)) - gray)
< qAbs(qGray(source.imageRef().color(1)) - gray))
source.fill(0);
else
source.fill(1);
} else {
source.fill(PREMUL(color.rgba()));
}
}
bool QVGPixmapData::hasAlphaChannel() const
{
ensureReadback(true);
if (!source.isNull())
return source.hasAlphaChannel();
else
return isValid();
}
void QVGPixmapData::setAlphaChannel(const QPixmap &alphaChannel)
{
if (!isValid())
return;
forceToImage();
source.setAlphaChannel(alphaChannel);
}
QImage QVGPixmapData::toImage() const
{
if (!isValid())
return QImage();
ensureReadback(true);
if (source.isNull()) {
source = QVolatileImage(w, h, sourceFormat());
recreate = true;
}
return source.toImage();
}
void QVGPixmapData::copy(const QPixmapData *data, const QRect &rect)
{
// toImage() is potentially expensive with QVolatileImage so provide a
// more efficient implementation of copy() that does not rely on it.
if (!data) {
return;
}
if (data->classId() != OpenVGClass) {
fromImage(data->toImage(rect), Qt::NoOpaqueDetection);
return;
}
const QVGPixmapData *pd = static_cast<const QVGPixmapData *>(data);
QRect r = rect;
if (r.isNull() || r.contains(QRect(0, 0, pd->w, pd->h))) {
r = QRect(0, 0, pd->w, pd->h);
}
resize(r.width(), r.height());
recreate = true;
if (!pd->source.isNull()) {
source = QVolatileImage(r.width(), r.height(), pd->source.format());
source.copyFrom(&pd->source, r);
}
}
QImage *QVGPixmapData::buffer()
{
// Cannot be safely implemented and QVGPixmapData is not (must not be) RasterClass anyway.
return 0;
}
QPaintEngine* QVGPixmapData::paintEngine() const
{
// If the application wants to paint into the QPixmap, we first
// force it to QImage format and then paint into that.
// This is simpler than juggling multiple VG contexts.
const_cast<QVGPixmapData *>(this)->forceToImage();
return source.paintEngine();
}
VGImage QVGPixmapData::toVGImage()
{
if (!isValid())
return VG_INVALID_HANDLE;
#if !defined(QT_NO_EGL)
// Increase the reference count on the shared context.
if (!context)
context = qt_vg_create_context(0, QInternal::Pixmap);
#endif
if (recreate && prevSize != QSize(w, h))
destroyImages();
else if (recreate)
cachedOpacity = -1.0f; // Force opacity image to be refreshed later.
#if defined(Q_OS_SYMBIAN)
if (recreate && nativeImageHandleProvider && !nativeImageHandle) {
createFromNativeImageHandleProvider();
}
#endif
if (vgImage == VG_INVALID_HANDLE) {
vgImage = QVGImagePool::instance()->createImageForPixmap
(qt_vg_image_to_vg_format(source.format()), w, h, VG_IMAGE_QUALITY_FASTER, this);
// Bail out if we run out of GPU memory - try again next time.
if (vgImage == VG_INVALID_HANDLE) {
return VG_INVALID_HANDLE;
}
inImagePool = true;
} else if (inImagePool) {
QVGImagePool::instance()->useImage(this);
}
if (!source.isNull() && (recreate || source.paintingActive())) {
source.beginDataAccess();
vgImageSubData
(vgImage,
source.constBits(), source.bytesPerLine(),
qt_vg_image_to_vg_format(source.format()), 0, 0, w, h);
source.endDataAccess(true);
}
recreate = false;
prevSize = QSize(w, h);
return vgImage;
}
VGImage QVGPixmapData::toVGImage(qreal opacity)
{
#if !defined(QT_SHIVAVG)
// Force the primary VG image to be recreated if necessary.
if (toVGImage() == VG_INVALID_HANDLE)
return VG_INVALID_HANDLE;
if (opacity == 1.0f)
return vgImage;
// Create an alternative image for the selected opacity.
if (vgImageOpacity == VG_INVALID_HANDLE || cachedOpacity != opacity) {
if (vgImageOpacity == VG_INVALID_HANDLE) {
if (inImagePool) {
vgImageOpacity = QVGImagePool::instance()->createImageForPixmap
(VG_sARGB_8888_PRE, w, h, VG_IMAGE_QUALITY_FASTER, this);
} else {
vgImageOpacity = vgCreateImage
(VG_sARGB_8888_PRE, w, h, VG_IMAGE_QUALITY_FASTER);
}
// Bail out if we run out of GPU memory - try again next time.
if (vgImageOpacity == VG_INVALID_HANDLE)
return VG_INVALID_HANDLE;
}
VGfloat matrix[20] = {
1.0f, 0.0f, 0.0f, 0.0f,
0.0f, 1.0f, 0.0f, 0.0f,
0.0f, 0.0f, 1.0f, 0.0f,
0.0f, 0.0f, 0.0f, opacity,
0.0f, 0.0f, 0.0f, 0.0f
};
vgColorMatrix(vgImageOpacity, vgImage, matrix);
cachedOpacity = opacity;
}
return vgImageOpacity;
#else
// vgColorMatrix() doesn't work with ShivaVG, so ignore the opacity.
Q_UNUSED(opacity);
return toVGImage();
#endif
}
void QVGPixmapData::detachImageFromPool()
{
if (inImagePool) {
QVGImagePool::instance()->detachImage(this);
inImagePool = false;
}
}
void QVGPixmapData::hibernate()
{
// If the image was imported (e.g, from an SgImage under Symbian), then
// skip the hibernation, there is no sense in copying it back to main
// memory because the data is most likely shared between several processes.
bool skipHibernate = (vgImage != VG_INVALID_HANDLE && source.isNull());
#if defined(Q_OS_SYMBIAN)
// However we have to proceed normally if the image was retrieved via
// a handle provider.
skipHibernate &= !nativeImageHandleProvider;
#endif
if (skipHibernate)
return;
forceToImage(false); // no readback allowed here
destroyImageAndContext();
}
void QVGPixmapData::reclaimImages()
{
if (!inImagePool)
return;
forceToImage();
destroyImages();
}
int QVGPixmapData::metric(QPaintDevice::PaintDeviceMetric metric) const
{
switch (metric) {
case QPaintDevice::PdmWidth:
return w;
case QPaintDevice::PdmHeight:
return h;
case QPaintDevice::PdmNumColors:
return 0;
case QPaintDevice::PdmDepth:
return d;
case QPaintDevice::PdmWidthMM:
return qRound(w * 25.4 / qt_defaultDpiX());
case QPaintDevice::PdmHeightMM:
return qRound(h * 25.4 / qt_defaultDpiY());
case QPaintDevice::PdmDpiX:
case QPaintDevice::PdmPhysicalDpiX:
return qt_defaultDpiX();
case QPaintDevice::PdmDpiY:
case QPaintDevice::PdmPhysicalDpiY:
return qt_defaultDpiY();
default:
qWarning("QVGPixmapData::metric(): Invalid metric");
return 0;
}
}
// Ensures that the pixmap is backed by some valid data and forces the data to
// be re-uploaded to the VGImage when toVGImage() is called next time.
void QVGPixmapData::forceToImage(bool allowReadback)
{
if (!isValid())
return;
if (allowReadback)
ensureReadback(false);
if (source.isNull())
source = QVolatileImage(w, h, sourceFormat());
recreate = true;
}
void QVGPixmapData::ensureReadback(bool readOnly) const
{
if (vgImage != VG_INVALID_HANDLE && source.isNull()) {
source = QVolatileImage(w, h, sourceFormat());
source.beginDataAccess();
vgGetImageSubData(vgImage, source.bits(), source.bytesPerLine(),
qt_vg_image_to_vg_format(source.format()),
0, 0, w, h);
source.endDataAccess();
if (readOnly) {
recreate = false;
} else {
// Once we did a readback, the original VGImage must be destroyed
// because it may be shared (e.g. created via SgImage) and a subsequent
// upload of the image data may produce unexpected results.
const_cast<QVGPixmapData *>(this)->destroyImages();
#if defined(Q_OS_SYMBIAN)
// There is now an own copy of the data so drop the handle provider,
// otherwise toVGImage() would request the handle again, which is wrong.
nativeImageHandleProvider = 0;
#endif
recreate = true;
}
}
}
QImage::Format QVGPixmapData::sourceFormat() const
{
return QImage::Format_ARGB32_Premultiplied;
}
/*
\internal
Returns the VGImage that is storing the contents of \a pixmap.
Returns VG_INVALID_HANDLE if \a pixmap is not owned by the OpenVG
graphics system or \a pixmap is invalid.
This function is typically used to access the backing store
for a pixmap when executing raw OpenVG calls. It must only
be used when a QPainter is active and the OpenVG paint engine
is in use by the QPainter.
\sa {QtOpenVG Module}
*/
Q_OPENVG_EXPORT VGImage qPixmapToVGImage(const QPixmap& pixmap)
{
QPixmapData *pd = pixmap.pixmapData();
if (!pd)
return VG_INVALID_HANDLE; // null QPixmap
if (pd->classId() == QPixmapData::OpenVGClass) {
QVGPixmapData *vgpd = static_cast<QVGPixmapData *>(pd);
if (vgpd->isValid())
return vgpd->toVGImage();
}
return VG_INVALID_HANDLE;
}
QT_END_NAMESPACE
|