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/*
* Copyright (C) 2012 Google 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 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.
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_IMAGE_FRAME_GENERATOR_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_IMAGE_FRAME_GENERATOR_H_
#include <memory>
#include "base/memory/scoped_refptr.h"
#include "third_party/blink/renderer/platform/image-decoders/image_decoder.h"
#include "third_party/blink/renderer/platform/image-decoders/segment_reader.h"
#include "third_party/blink/renderer/platform/platform_export.h"
#include "third_party/blink/renderer/platform/wtf/allocator.h"
#include "third_party/blink/renderer/platform/wtf/noncopyable.h"
#include "third_party/blink/renderer/platform/wtf/ref_counted.h"
#include "third_party/blink/renderer/platform/wtf/thread_safe_ref_counted.h"
#include "third_party/blink/renderer/platform/wtf/threading_primitives.h"
#include "third_party/blink/renderer/platform/wtf/vector.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "third_party/skia/include/core/SkSize.h"
#include "third_party/skia/include/core/SkTypes.h"
struct SkYUVSizeInfo;
namespace blink {
class ImageDecoder;
class PLATFORM_EXPORT ImageDecoderFactory {
USING_FAST_MALLOC(ImageDecoderFactory);
WTF_MAKE_NONCOPYABLE(ImageDecoderFactory);
public:
ImageDecoderFactory() = default;
virtual ~ImageDecoderFactory() = default;
virtual std::unique_ptr<ImageDecoder> Create() = 0;
};
class PLATFORM_EXPORT ImageFrameGenerator final
: public ThreadSafeRefCounted<ImageFrameGenerator> {
WTF_MAKE_NONCOPYABLE(ImageFrameGenerator);
public:
static scoped_refptr<ImageFrameGenerator> Create(
const SkISize& full_size,
bool is_multi_frame,
const ColorBehavior& color_behavior,
std::vector<SkISize> supported_sizes) {
return base::AdoptRef(new ImageFrameGenerator(
full_size, is_multi_frame, color_behavior, std::move(supported_sizes)));
}
~ImageFrameGenerator();
// Decodes and scales the specified frame at |index|. The dimensions and
// output format are given in SkImageInfo. Decoded pixels are written into
// |pixels| with a stride of |rowBytes|. Returns true if decoding was
// successful.
bool DecodeAndScale(SegmentReader*,
bool all_data_received,
size_t index,
const SkImageInfo&,
void* pixels,
size_t row_bytes,
ImageDecoder::AlphaOption);
// Decodes YUV components directly into the provided memory planes. Must not
// be called unless getYUVComponentSizes has been called and returned true.
// YUV decoding does not currently support progressive decoding. In order to
// support it, ImageDecoder needs something analagous to its ImageFrame cache
// to hold partial planes, and the GPU code needs to handle them.
bool DecodeToYUV(SegmentReader*,
size_t index,
const SkISize component_sizes[3],
void* planes[3],
const size_t row_bytes[3]);
const SkISize& GetFullSize() const { return full_size_; }
SkISize GetSupportedDecodeSize(const SkISize& requested_size) const;
bool IsMultiFrame() const { return is_multi_frame_; }
bool DecodeFailed() const { return decode_failed_; }
bool HasAlpha(size_t index);
// Must not be called unless the SkROBuffer has all the data. YUV decoding
// does not currently support progressive decoding. See comment above on
// decodeToYUV().
bool GetYUVComponentSizes(SegmentReader*, SkYUVSizeInfo*);
private:
ImageFrameGenerator(const SkISize& full_size,
bool is_multi_frame,
const ColorBehavior&,
std::vector<SkISize> supported_sizes);
friend class ImageFrameGeneratorTest;
friend class DeferredImageDecoderTest;
// For testing. |factory| will overwrite the default ImageDecoder creation
// logic if |factory->create()| returns non-zero.
void SetImageDecoderFactory(std::unique_ptr<ImageDecoderFactory> factory) {
image_decoder_factory_ = std::move(factory);
}
void SetHasAlpha(size_t index, bool has_alpha);
SkBitmap TryToResumeDecode(SegmentReader*,
bool all_data_received,
size_t index,
const SkISize& scaled_size,
SkBitmap::Allocator&,
ImageDecoder::AlphaOption);
// This method should only be called while decode_mutex_ is locked.
// Returns a pointer to frame |index|'s ImageFrame, if available.
// Sets |used_external_allocator| to true if the the image was decoded into
// |external_allocator|'s memory.
ImageFrame* Decode(SegmentReader*,
bool all_data_received,
size_t index,
ImageDecoder**,
SkBitmap::Allocator& external_allocator,
ImageDecoder::AlphaOption,
const SkISize& scaled_size,
bool& used_external_allocator);
const SkISize full_size_;
// Parameters used to create internal ImageDecoder objects.
const ColorBehavior decoder_color_behavior_;
const bool is_multi_frame_;
bool decode_failed_;
bool yuv_decoding_failed_;
size_t frame_count_;
Vector<bool> has_alpha_;
std::vector<SkISize> supported_sizes_;
std::unique_ptr<ImageDecoderFactory> image_decoder_factory_;
// Prevents multiple decode operations on the same data.
Mutex decode_mutex_;
// Protect concurrent access to has_alpha_.
Mutex alpha_mutex_;
};
} // namespace blink
#endif
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