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/*
* Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
* Copyright (C) Research In Motion Limited 2011. All rights reserved.
*
* 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 "IntRect.h"
#include "PlatformMemoryInstrumentation.h"
#include <wtf/MathExtras.h>
namespace WebCore {
#if !USE(CG)
void ImageBuffer::transformColorSpace(ColorSpace srcColorSpace, ColorSpace dstColorSpace)
{
DEFINE_STATIC_LOCAL(Vector<int>, deviceRgbLUT, ());
DEFINE_STATIC_LOCAL(Vector<int>, linearRgbLUT, ());
if (srcColorSpace == dstColorSpace)
return;
// only sRGB <-> linearRGB are supported at the moment
if ((srcColorSpace != ColorSpaceLinearRGB && srcColorSpace != ColorSpaceDeviceRGB)
|| (dstColorSpace != ColorSpaceLinearRGB && dstColorSpace != ColorSpaceDeviceRGB))
return;
if (dstColorSpace == ColorSpaceLinearRGB) {
if (linearRgbLUT.isEmpty()) {
for (unsigned i = 0; i < 256; i++) {
float color = i / 255.0f;
color = (color <= 0.04045f ? color / 12.92f : pow((color + 0.055f) / 1.055f, 2.4f));
color = std::max(0.0f, color);
color = std::min(1.0f, color);
linearRgbLUT.append(static_cast<int>(round(color * 255)));
}
}
platformTransformColorSpace(linearRgbLUT);
} else if (dstColorSpace == ColorSpaceDeviceRGB) {
if (deviceRgbLUT.isEmpty()) {
for (unsigned i = 0; i < 256; i++) {
float color = i / 255.0f;
color = (powf(color, 1.0f / 2.4f) * 1.055f) - 0.055f;
color = std::max(0.0f, color);
color = std::min(1.0f, color);
deviceRgbLUT.append(static_cast<int>(round(color * 255)));
}
}
platformTransformColorSpace(deviceRgbLUT);
}
}
#endif // USE(CG)
inline void ImageBuffer::genericConvertToLuminanceMask()
{
IntRect luminanceRect(IntPoint(), internalSize());
RefPtr<Uint8ClampedArray> srcPixelArray = getUnmultipliedImageData(luminanceRect);
unsigned pixelArrayLength = srcPixelArray->length();
for (unsigned pixelOffset = 0; pixelOffset < pixelArrayLength; pixelOffset += 4) {
unsigned char a = srcPixelArray->item(pixelOffset + 3);
if (!a)
continue;
unsigned char r = srcPixelArray->item(pixelOffset);
unsigned char g = srcPixelArray->item(pixelOffset + 1);
unsigned char b = srcPixelArray->item(pixelOffset + 2);
double luma = (r * 0.2125 + g * 0.7154 + b * 0.0721) * ((double)a / 255.0);
srcPixelArray->set(pixelOffset + 3, luma);
}
putByteArray(Unmultiplied, srcPixelArray.get(), luminanceRect.size(), luminanceRect, IntPoint());
}
void ImageBuffer::convertToLuminanceMask()
{
// Add platform specific functions with platformConvertToLuminanceMask here later.
genericConvertToLuminanceMask();
}
#if USE(ACCELERATED_COMPOSITING) && !USE(SKIA)
PlatformLayer* ImageBuffer::platformLayer() const
{
return 0;
}
#endif
#if !USE(SKIA)
bool ImageBuffer::copyToPlatformTexture(GraphicsContext3D&, Platform3DObject, GC3Denum, bool, bool)
{
return false;
}
#endif
void ImageBuffer::reportMemoryUsage(MemoryObjectInfo* memoryObjectInfo) const
{
MemoryClassInfo info(memoryObjectInfo, this, PlatformMemoryTypes::Image);
info.addMember(m_data);
info.addMember(m_context);
}
}
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