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/*
* Copyright (C) 2006 Nikolas Zimmermann <zimmermann@kde.org>
* Copyright (C) 2008 Holger Hans Peter Freyther
* Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
* Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. All rights reserved.
* Copyright (C) 2014 Digia Plc. and/or its subsidiary(-ies)
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "ImageBuffer.h"
#include "GraphicsContext.h"
#include "ImageData.h"
#include "MIMETypeRegistry.h"
#include "StillImageQt.h"
#include "TransparencyLayer.h"
#include <wtf/text/CString.h>
#include <wtf/text/WTFString.h>
#include <QBuffer>
#include <QImage>
#include <QImageWriter>
#include <QPainter>
#include <QPixmap>
#include <math.h>
namespace WebCore {
#if ENABLE(ACCELERATED_2D_CANVAS)
ImageBuffer::ImageBuffer(const IntSize& size, float /* resolutionScale */, ColorSpace, QOpenGLContext* compatibleContext, bool& success)
: m_data(size, compatibleContext)
, m_size(size)
, m_logicalSize(size)
{
success = m_data.m_painter && m_data.m_painter->isActive();
if (!success)
return;
m_context = adoptPtr(new GraphicsContext(m_data.m_painter));
}
#endif
ImageBuffer::ImageBuffer(const IntSize& size, float /* resolutionScale */, ColorSpace, RenderingMode /*renderingMode*/, bool& success)
: m_data(size)
, m_size(size)
, m_logicalSize(size)
{
success = m_data.m_painter && m_data.m_painter->isActive();
if (!success)
return;
m_context = adoptPtr(new GraphicsContext(m_data.m_painter));
}
ImageBuffer::~ImageBuffer()
{
}
#if ENABLE(ACCELERATED_2D_CANVAS)
PassOwnPtr<ImageBuffer> ImageBuffer::createCompatibleBuffer(const IntSize& size, float resolutionScale, ColorSpace colorSpace, QOpenGLContext* context)
{
bool success = false;
OwnPtr<ImageBuffer> buf = adoptPtr(new ImageBuffer(size, resolutionScale, colorSpace, context, success));
if (!success)
return nullptr;
return buf.release();
}
#endif
GraphicsContext* ImageBuffer::context() const
{
ASSERT(m_data.m_painter->isActive());
return m_context.get();
}
PassRefPtr<Image> ImageBuffer::copyImage(BackingStoreCopy copyBehavior, ScaleBehavior) const
{
if (copyBehavior == CopyBackingStore)
return m_data.m_impl->copyImage();
return m_data.m_impl->image();
}
BackingStoreCopy ImageBuffer::fastCopyImageMode()
{
return DontCopyBackingStore;
}
void ImageBuffer::draw(GraphicsContext* destContext, ColorSpace styleColorSpace, const FloatRect& destRect, const FloatRect& srcRect,
CompositeOperator op, BlendMode blendMode, bool useLowQualityScale)
{
m_data.m_impl->draw(destContext, styleColorSpace, destRect, srcRect, op, blendMode, useLowQualityScale, destContext == context());
}
void ImageBuffer::drawPattern(GraphicsContext* destContext, const FloatRect& srcRect, const AffineTransform& patternTransform,
const FloatPoint& phase, ColorSpace styleColorSpace, CompositeOperator op, const FloatRect& destRect)
{
m_data.m_impl->drawPattern(destContext, srcRect, patternTransform, phase, styleColorSpace, op, destRect, destContext == context());
}
void ImageBuffer::clip(GraphicsContext* context, const FloatRect& floatRect) const
{
m_data.m_impl->clip(context, floatRect);
}
void ImageBuffer::platformTransformColorSpace(const Vector<int>& lookUpTable)
{
m_data.m_impl->platformTransformColorSpace(lookUpTable);
}
template <Multiply multiplied>
PassRefPtr<Uint8ClampedArray> getImageData(const IntRect& rect, const ImageBufferData& imageData, const IntSize& size)
{
float area = 4.0f * rect.width() * rect.height();
if (area > static_cast<float>(std::numeric_limits<int>::max()))
return 0;
RefPtr<Uint8ClampedArray> result = Uint8ClampedArray::createUninitialized(rect.width() * rect.height() * 4);
QImage::Format format = (multiplied == Unmultiplied) ? QImage::Format_RGBA8888 : QImage::Format_RGBA8888_Premultiplied;
QImage image(result->data(), rect.width(), rect.height(), format);
if (rect.x() < 0 || rect.y() < 0 || rect.maxX() > size.width() || rect.maxY() > size.height())
image.fill(0);
// Let drawImage deal with the conversion.
// FIXME: This is inefficient for accelerated ImageBuffers when only part of the imageData is read.
QPainter painter(&image);
painter.setCompositionMode(QPainter::CompositionMode_Source);
painter.drawImage(QPoint(0,0), imageData.m_impl->toQImage(), rect);
painter.end();
return result.release();
}
PassRefPtr<Uint8ClampedArray> ImageBuffer::getUnmultipliedImageData(const IntRect& rect, CoordinateSystem) const
{
return getImageData<Unmultiplied>(rect, m_data, m_size);
}
PassRefPtr<Uint8ClampedArray> ImageBuffer::getPremultipliedImageData(const IntRect& rect, CoordinateSystem) const
{
return getImageData<Premultiplied>(rect, m_data, m_size);
}
void ImageBuffer::putByteArray(Multiply multiplied, Uint8ClampedArray* source, const IntSize& sourceSize, const IntRect& sourceRect, const IntPoint& destPoint, CoordinateSystem)
{
ASSERT(sourceRect.width() > 0);
ASSERT(sourceRect.height() > 0);
bool isPainting = m_data.m_painter->isActive();
if (!isPainting)
m_data.m_painter->begin(m_data.m_impl->paintDevice());
else {
m_data.m_painter->save();
// putImageData() should be unaffected by painter state
m_data.m_painter->resetTransform();
m_data.m_painter->setOpacity(1.0);
m_data.m_painter->setClipping(false);
}
// Let drawImage deal with the conversion.
QImage::Format format = (multiplied == Unmultiplied) ? QImage::Format_RGBA8888 : QImage::Format_RGBA8888_Premultiplied;
QImage image(source->data(), sourceSize.width(), sourceSize.height(), format);
m_data.m_painter->setCompositionMode(QPainter::CompositionMode_Source);
m_data.m_painter->drawImage(destPoint + sourceRect.location(), image, sourceRect);
if (!isPainting)
m_data.m_painter->end();
else
m_data.m_painter->restore();
}
static bool encodeImage(const QPixmap& pixmap, const String& format, const double* quality, QByteArray& data)
{
int compressionQuality = 100;
if (quality && *quality >= 0.0 && *quality <= 1.0)
compressionQuality = static_cast<int>(*quality * 100 + 0.5);
QBuffer buffer(&data);
buffer.open(QBuffer::WriteOnly);
bool success = pixmap.save(&buffer, format.utf8().data(), compressionQuality);
buffer.close();
return success;
}
String ImageBuffer::toDataURL(const String& mimeType, const double* quality, CoordinateSystem) const
{
ASSERT(MIMETypeRegistry::isSupportedImageMIMETypeForEncoding(mimeType));
// QImageWriter does not support mimetypes. It does support Qt image formats (png,
// gif, jpeg..., xpm) so skip the image/ to get the Qt image format used to encode
// the m_pixmap image.
RefPtr<Image> image = copyImage(DontCopyBackingStore);
QByteArray data;
if (!encodeImage(*image->nativeImageForCurrentFrame(), mimeType.substring(sizeof "image"), quality, data))
return "data:,";
return "data:" + mimeType + ";base64," + data.toBase64().data();
}
PlatformLayer* ImageBuffer::platformLayer() const
{
return m_data.m_impl->platformLayer();
}
}
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