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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 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 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 "GraphicsContextGL.h"
#if ENABLE(WEBGL) && USE(CAIRO)
#include "BitmapImage.h"
#include "CairoUtilities.h"
#include "GraphicsContext.h"
#include "GraphicsContextGLImageExtractor.h"
#include "PixelBuffer.h"
#include "RefPtrCairo.h"
#include <cairo.h>
namespace WebCore {
GraphicsContextGLImageExtractor::~GraphicsContextGLImageExtractor() = default;
bool GraphicsContextGLImageExtractor::extractImage(bool premultiplyAlpha, bool ignoreGammaAndColorProfile, bool)
{
// We need this to stay in scope because the native image is just a shallow copy of the data.
AlphaOption alphaOption = premultiplyAlpha ? AlphaOption::Premultiplied : AlphaOption::NotPremultiplied;
GammaAndColorProfileOption gammaAndColorProfileOption = ignoreGammaAndColorProfile ? GammaAndColorProfileOption::Ignored : GammaAndColorProfileOption::Applied;
auto image = BitmapImage::create(nullptr, alphaOption, gammaAndColorProfileOption);
m_alphaOp = AlphaOp::DoNothing;
if (m_image->data()) {
image->setData(m_image->data(), true);
if (!image->frameCount())
return false;
m_imageSurface = image->currentNativeImage()->platformImage();
} else {
m_imageSurface = m_image->currentNativeImage()->platformImage();
// 1. For texImage2D with HTMLVideoElment input, assume no PremultiplyAlpha had been applied and the alpha value is 0xFF for each pixel,
// which is true at present and may be changed in the future and needs adjustment accordingly.
// 2. For texImage2D with HTMLCanvasElement input in which Alpha is already Premultiplied in this port,
// do AlphaDoUnmultiply if UNPACK_PREMULTIPLY_ALPHA_WEBGL is set to false.
if (!premultiplyAlpha && m_imageHtmlDomSource != DOMSource::Video)
m_alphaOp = AlphaOp::DoUnmultiply;
// if m_imageSurface is not an image, extract a copy of the surface
if (m_imageSurface && cairo_surface_get_type(m_imageSurface.get()) != CAIRO_SURFACE_TYPE_IMAGE) {
IntSize surfaceSize = cairoSurfaceSize(m_imageSurface.get());
auto tmpSurface = adoptRef(cairo_image_surface_create(CAIRO_FORMAT_ARGB32, surfaceSize.width(), surfaceSize.height()));
copyRectFromOneSurfaceToAnother(m_imageSurface.get(), tmpSurface.get(), IntSize(), IntRect(IntPoint(), surfaceSize), IntSize());
m_imageSurface = WTFMove(tmpSurface);
}
}
if (!m_imageSurface)
return false;
ASSERT(cairo_surface_get_type(m_imageSurface.get()) == CAIRO_SURFACE_TYPE_IMAGE);
IntSize imageSize = cairoSurfaceSize(m_imageSurface.get());
m_imageWidth = imageSize.width();
m_imageHeight = imageSize.height();
if (!m_imageWidth || !m_imageHeight)
return false;
if (cairo_image_surface_get_format(m_imageSurface.get()) != CAIRO_FORMAT_ARGB32)
return false;
unsigned srcUnpackAlignment = 1;
size_t bytesPerRow = cairo_image_surface_get_stride(m_imageSurface.get());
size_t bitsPerPixel = 32;
unsigned padding = bytesPerRow - bitsPerPixel / 8 * m_imageWidth;
if (padding) {
srcUnpackAlignment = padding + 1;
while (bytesPerRow % srcUnpackAlignment)
++srcUnpackAlignment;
}
m_imagePixelData = span(m_imageSurface.get());
m_imageSourceFormat = DataFormat::BGRA8;
m_imageSourceUnpackAlignment = srcUnpackAlignment;
return true;
}
RefPtr<NativeImage> GraphicsContextGL::createNativeImageFromPixelBuffer(const GraphicsContextGLAttributes& sourceContextAttributes, Ref<PixelBuffer>&& pixelBuffer)
{
ASSERT(!pixelBuffer->size().isEmpty());
// Convert RGBA to BGRA. BGRA is CAIRO_FORMAT_ARGB32 on little-endian architectures.
Ref protectedPixelBuffer = pixelBuffer;
size_t totalBytes = pixelBuffer->bytes().size();
uint8_t* pixels = pixelBuffer->bytes().data();
for (size_t i = 0; i < totalBytes; i += 4)
std::swap(pixels[i], pixels[i + 2]);
if (!sourceContextAttributes.premultipliedAlpha) {
for (size_t i = 0; i < totalBytes; i += 4) {
pixels[i + 0] = std::min(255, pixels[i + 0] * pixels[i + 3] / 255);
pixels[i + 1] = std::min(255, pixels[i + 1] * pixels[i + 3] / 255);
pixels[i + 2] = std::min(255, pixels[i + 2] * pixels[i + 3] / 255);
}
}
auto imageSize = pixelBuffer->size();
RefPtr<cairo_surface_t> imageSurface = adoptRef(cairo_image_surface_create_for_data(
pixels, CAIRO_FORMAT_ARGB32, imageSize.width(), imageSize.height(), imageSize.width() * 4));
static cairo_user_data_key_t dataKey;
cairo_surface_set_user_data(imageSurface.get(), &dataKey, &protectedPixelBuffer.leakRef(), [](void* buffer) {
static_cast<PixelBuffer*>(buffer)->deref();
});
return NativeImage::create(WTFMove(imageSurface));
}
} // namespace WebCore
#endif // ENABLE(WEBGL) && USE(CAIRO)
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