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/*
* Copyright (C) 2010 Apple Inc. All rights reserved.
* Copyright (C) 2010 Google Inc. All rights reserved.
* Copyright (C) 2011 Igalia S.L.
*
* 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 "GraphicsContext3D.h"
#include "PlatformContextCairo.h"
#if ENABLE(WEBGL)
#include "Image.h"
#include "RefPtrCairo.h"
#include <cairo.h>
#include <wtf/PassOwnPtr.h>
namespace WebCore {
bool GraphicsContext3D::getImageData(Image* image, unsigned int format, unsigned int type, bool premultiplyAlpha, bool ignoreGammaAndColorProfile, Vector<uint8_t>& outputVector)
{
if (!image)
return false;
// We need this to stay in scope because the native image is just a shallow copy of the data.
ImageSource decoder(premultiplyAlpha ? ImageSource::AlphaPremultiplied : ImageSource::AlphaNotPremultiplied,
ignoreGammaAndColorProfile ? ImageSource::GammaAndColorProfileIgnored : ImageSource::GammaAndColorProfileApplied);
AlphaOp alphaOp = AlphaDoNothing;
RefPtr<cairo_surface_t> imageSurface;
if (image->data()) {
decoder.setData(image->data(), true);
if (!decoder.frameCount() || !decoder.frameIsCompleteAtIndex(0))
return false;
imageSurface = decoder.createFrameAtIndex(0);
} else {
imageSurface = image->nativeImageForCurrentFrame();
if (!premultiplyAlpha)
alphaOp = AlphaDoUnmultiply;
}
if (!imageSurface)
return false;
int width = cairo_image_surface_get_width(imageSurface.get());
int height = cairo_image_surface_get_height(imageSurface.get());
if (!width || !height)
return false;
if (cairo_image_surface_get_format(imageSurface.get()) != CAIRO_FORMAT_ARGB32)
return false;
unsigned int srcUnpackAlignment = 1;
size_t bytesPerRow = cairo_image_surface_get_stride(imageSurface.get());
size_t bitsPerPixel = 32;
unsigned int padding = bytesPerRow - bitsPerPixel / 8 * width;
if (padding) {
srcUnpackAlignment = padding + 1;
while (bytesPerRow % srcUnpackAlignment)
++srcUnpackAlignment;
}
outputVector.resize(width * height * 4);
return packPixels(cairo_image_surface_get_data(imageSurface.get()), SourceFormatBGRA8,
width, height, srcUnpackAlignment, format, type, alphaOp, outputVector.data());
}
void GraphicsContext3D::paintToCanvas(const unsigned char* imagePixels, int imageWidth, int imageHeight, int canvasWidth, int canvasHeight, PlatformContextCairo* context)
{
if (!imagePixels || imageWidth <= 0 || imageHeight <= 0 || canvasWidth <= 0 || canvasHeight <= 0 || !context)
return;
cairo_t *cr = context->cr();
context->save();
cairo_rectangle(cr, 0, 0, canvasWidth, canvasHeight);
cairo_set_operator(cr, CAIRO_OPERATOR_CLEAR);
cairo_paint(cr);
RefPtr<cairo_surface_t> imageSurface = adoptRef(cairo_image_surface_create_for_data(
const_cast<unsigned char*>(imagePixels), CAIRO_FORMAT_ARGB32, imageWidth, imageHeight, imageWidth * 4));
// OpenGL keeps the pixels stored bottom up, so we need to flip the image here.
cairo_translate(cr, 0, imageHeight);
cairo_scale(cr, 1, -1);
cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
cairo_set_source_surface(cr, imageSurface.get(), 0, 0);
cairo_rectangle(cr, 0, 0, canvasWidth, -canvasHeight);
cairo_fill(cr);
context->restore();
}
void GraphicsContext3D::setContextLostCallback(PassOwnPtr<ContextLostCallback>)
{
}
void GraphicsContext3D::setErrorMessageCallback(PassOwnPtr<ErrorMessageCallback>)
{
}
#if USE(ACCELERATED_COMPOSITING)
PlatformLayer* GraphicsContext3D::platformLayer() const
{
return 0;
}
#endif
} // namespace WebCore
#endif // ENABLE(WEBGL)
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