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/*
* Copyright (C) 2017-2018 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. AND ITS CONTRIBUTORS ``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 ITS 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
#include "DecodingOptions.h"
#include "ImageOrientation.h"
#include "ImageTypes.h"
#include "IntPoint.h"
#include "IntSize.h"
#include "PlatformImage.h"
#include <wtf/Seconds.h>
#include <wtf/text/WTFString.h>
#include <wtf/ThreadSafeRefCounted.h>
namespace WebCore {
class FragmentedSharedBuffer;
class ImageDecoder : public ThreadSafeRefCounted<ImageDecoder> {
WTF_MAKE_FAST_ALLOCATED;
public:
static RefPtr<ImageDecoder> create(FragmentedSharedBuffer&, const String& mimeType, AlphaOption, GammaAndColorProfileOption);
virtual ~ImageDecoder() = default;
enum class MediaType {
Image,
Video,
};
struct FrameMetadata {
ImageOrientation orientation;
std::optional<IntSize> densityCorrectedSize;
};
struct FrameInfo {
bool hasAlpha;
Seconds duration;
template<class Encoder>
void encode(Encoder& encoder) const
{
encoder << hasAlpha;
encoder << duration;
}
template<class Decoder>
static std::optional<FrameInfo> decode(Decoder& decoder)
{
std::optional<bool> hasAlpha;
decoder >> hasAlpha;
if (!hasAlpha)
return std::nullopt;
std::optional<Seconds> duration;
decoder >> duration;
if (!duration)
return std::nullopt;
return {{
*hasAlpha,
*duration
}};
}
};
static bool supportsMediaType(MediaType);
#if ENABLE(GPU_PROCESS)
using SupportsMediaTypeFunc = Function<bool(MediaType)>;
using CanDecodeTypeFunc = Function<bool(const String&)>;
using CreateImageDecoderFunc = Function<RefPtr<ImageDecoder>(FragmentedSharedBuffer&, const String&, AlphaOption, GammaAndColorProfileOption)>;
struct ImageDecoderFactory {
SupportsMediaTypeFunc supportsMediaType;
CanDecodeTypeFunc canDecodeType;
CreateImageDecoderFunc createImageDecoder;
};
WEBCORE_EXPORT static void installFactory(ImageDecoderFactory&&);
WEBCORE_EXPORT static void resetFactories();
WEBCORE_EXPORT static void clearFactories();
#endif
virtual size_t bytesDecodedToDetermineProperties() const = 0;
virtual EncodedDataStatus encodedDataStatus() const = 0;
virtual void setEncodedDataStatusChangeCallback(Function<void(EncodedDataStatus)>&&) { }
virtual bool isSizeAvailable() const { return encodedDataStatus() >= EncodedDataStatus::SizeAvailable; }
virtual IntSize size() const = 0;
virtual size_t frameCount() const = 0;
virtual RepetitionCount repetitionCount() const = 0;
virtual String uti() const { return emptyString(); }
virtual String filenameExtension() const = 0;
virtual String accessibilityDescription() const { return emptyString(); };
virtual std::optional<IntPoint> hotSpot() const = 0;
virtual IntSize frameSizeAtIndex(size_t, SubsamplingLevel = SubsamplingLevel::Default) const = 0;
virtual bool frameIsCompleteAtIndex(size_t) const = 0;
virtual FrameMetadata frameMetadataAtIndex(size_t) const = 0;
virtual Seconds frameDurationAtIndex(size_t) const = 0;
virtual bool frameHasAlphaAtIndex(size_t) const = 0;
virtual bool frameAllowSubsamplingAtIndex(size_t) const = 0;
virtual unsigned frameBytesAtIndex(size_t, SubsamplingLevel = SubsamplingLevel::Default) const = 0;
virtual PlatformImagePtr createFrameImageAtIndex(size_t, SubsamplingLevel = SubsamplingLevel::Default, const DecodingOptions& = DecodingOptions(DecodingMode::Synchronous)) = 0;
virtual void setExpectedContentSize(long long) { }
virtual void setData(const FragmentedSharedBuffer&, bool allDataReceived) = 0;
virtual bool isAllDataReceived() const = 0;
virtual void clearFrameBufferCache(size_t) = 0;
protected:
ImageDecoder() = default;
};
}
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