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/*
* Copyright (C) 2024 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(SKIA)
#include "BitmapImage.h"
#include "GLContext.h"
#include "GraphicsContextGLImageExtractor.h"
#include "NotImplemented.h"
#include "PixelBuffer.h"
#include "PlatformDisplay.h"
#include "SharedBuffer.h"
#include "SkiaSpanExtras.h"
#include <skia/core/SkData.h>
WTF_IGNORE_WARNINGS_IN_THIRD_PARTY_CODE_BEGIN
#include <skia/core/SkImage.h>
#include <skia/core/SkPixmap.h>
WTF_IGNORE_WARNINGS_IN_THIRD_PARTY_CODE_END
namespace WebCore {
GraphicsContextGLImageExtractor::~GraphicsContextGLImageExtractor() = default;
bool GraphicsContextGLImageExtractor::extractImage(bool premultiplyAlpha, bool ignoreGammaAndColorProfile, bool ignoreNativeImageAlphaPremultiplication)
{
PlatformImagePtr platformImage;
bool hasAlpha = !m_image->currentFrameKnownToBeOpaque();
if ((ignoreGammaAndColorProfile || (hasAlpha && !premultiplyAlpha)) && m_image->data()) {
auto image = BitmapImage::create(nullptr, AlphaOption::NotPremultiplied, ignoreGammaAndColorProfile ? GammaAndColorProfileOption::Ignored : GammaAndColorProfileOption::Applied);
image->setData(m_image->data(), true);
if (!image->frameCount())
return false;
platformImage = image->currentNativeImage()->platformImage();
} else
platformImage = m_image->currentNativeImage()->platformImage();
if (!platformImage)
return false;
m_imageWidth = platformImage->width();
m_imageHeight = platformImage->height();
if (!m_imageWidth || !m_imageHeight)
return false;
const auto& imageInfo = platformImage->imageInfo();
m_alphaOp = AlphaOp::DoNothing;
switch (imageInfo.alphaType()) {
case kUnknown_SkAlphaType:
case kOpaque_SkAlphaType:
break;
case kPremul_SkAlphaType:
if (!premultiplyAlpha)
m_alphaOp = AlphaOp::DoUnmultiply;
else if (ignoreNativeImageAlphaPremultiplication)
m_alphaOp = AlphaOp::DoPremultiply;
break;
case kUnpremul_SkAlphaType:
if (premultiplyAlpha)
m_alphaOp = AlphaOp::DoPremultiply;
break;
}
unsigned srcUnpackAlignment = 1;
size_t bytesPerRow = imageInfo.minRowBytes();
size_t bytesPerPixel = imageInfo.bytesPerPixel();
unsigned padding = bytesPerRow - bytesPerPixel * m_imageWidth;
if (padding) {
srcUnpackAlignment = padding + 1;
while (bytesPerRow % srcUnpackAlignment)
++srcUnpackAlignment;
}
if (platformImage->isTextureBacked()) {
auto data = SkData::MakeUninitialized(imageInfo.computeMinByteSize());
if (!PlatformDisplay::sharedDisplay().skiaGLContext()->makeContextCurrent())
return false;
GrDirectContext* grContext = PlatformDisplay::sharedDisplay().skiaGrContext();
if (!platformImage->readPixels(grContext, imageInfo, static_cast<uint8_t*>(data->writable_data()), bytesPerRow, 0, 0))
return false;
m_pixelData = WTFMove(data);
m_imagePixelData = span(m_pixelData.get());
// SkSurfaces backed by textures have RGBA format.
m_imageSourceFormat = DataFormat::RGBA8;
} else {
SkPixmap pixmap;
if (!platformImage->peekPixels(&pixmap))
return false;
m_skImage = WTFMove(platformImage);
m_imagePixelData = span(pixmap);
// Raster SkSurfaces have BGRA format.
m_imageSourceFormat = DataFormat::BGRA8;
}
m_imageSourceUnpackAlignment = srcUnpackAlignment;
return true;
}
RefPtr<NativeImage> GraphicsContextGL::createNativeImageFromPixelBuffer(const GraphicsContextGLAttributes& sourceContextAttributes, Ref<PixelBuffer>&& pixelBuffer)
{
ASSERT(!pixelBuffer->size().isEmpty());
auto imageSize = pixelBuffer->size();
SkAlphaType alphaType = kUnpremul_SkAlphaType;
if (!sourceContextAttributes.alpha)
alphaType = kOpaque_SkAlphaType;
else if (sourceContextAttributes.premultipliedAlpha)
alphaType = kPremul_SkAlphaType;
auto imageInfo = SkImageInfo::Make(imageSize.width(), imageSize.height(), kRGBA_8888_SkColorType, alphaType, SkColorSpace::MakeSRGB());
Ref protectedPixelBuffer = pixelBuffer;
SkPixmap pixmap(imageInfo, pixelBuffer->bytes().data(), imageInfo.minRowBytes());
auto image = SkImages::RasterFromPixmap(pixmap, [](const void*, void* context) {
static_cast<PixelBuffer*>(context)->deref();
}, &protectedPixelBuffer.leakRef());
return NativeImage::create(WTFMove(image));
}
} // namespace WebCore
#endif // ENABLE(WEBGL) && USE(SKIA)
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