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/*
* Copyright (C) 2020 Apple Inc. 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 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.
*/
#pragma once
#if ENABLE(WEBGL)
#include "GraphicsContextGL.h"
#include <wtf/MallocSpan.h>
namespace WebCore {
class GraphicsContextGLImageExtractor {
public:
using DOMSource = GraphicsContextGL::DOMSource;
using DataFormat = GraphicsContextGL::DataFormat;
using AlphaOp = GraphicsContextGL::AlphaOp;
GraphicsContextGLImageExtractor(Image&, DOMSource, bool premultiplyAlpha, bool ignoreGammaAndColorProfile, bool ignoreNativeImageAlphaPremultiplication);
// Each platform must provide an implementation of this method to deallocate or release resources
// associated with the image if needed.
~GraphicsContextGLImageExtractor();
bool extractSucceeded() { return m_extractSucceeded; }
std::span<const uint8_t> imagePixelData() { return m_imagePixelData; }
unsigned imageWidth() { return m_imageWidth; }
unsigned imageHeight() { return m_imageHeight; }
DataFormat imageSourceFormat() { return m_imageSourceFormat; }
AlphaOp imageAlphaOp() { return m_alphaOp; }
unsigned imageSourceUnpackAlignment() { return m_imageSourceUnpackAlignment; }
DOMSource imageHtmlDomSource() { return m_imageHtmlDomSource; }
private:
// Each platform must provide an implementation of this method.
// Extracts the image and keeps track of its status, such as width, height, Source Alignment, format and AlphaOp etc,
// needs to lock the resources or relevant data if needed and returns true upon success
bool extractImage(bool premultiplyAlpha, bool ignoreGammaAndColorProfile, bool ignoreNativeImageAlphaPremultiplication);
#if USE(CAIRO)
RefPtr<cairo_surface_t> m_imageSurface;
#elif USE(CG)
RetainPtr<CFDataRef> m_pixelData;
MallocSpan<uint8_t> m_formalizedRGBA8Data;
#elif USE(SKIA)
sk_sp<SkData> m_pixelData;
sk_sp<SkImage> m_skImage;
#endif
Ref<Image> m_image;
DOMSource m_imageHtmlDomSource;
bool m_extractSucceeded;
std::span<const uint8_t> m_imagePixelData;
unsigned m_imageWidth;
unsigned m_imageHeight;
DataFormat m_imageSourceFormat;
AlphaOp m_alphaOp;
unsigned m_imageSourceUnpackAlignment;
};
}
#endif
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