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/*
* Copyright (C) 2004, 2005, 2006 Apple Computer, 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 ImageSource_h
#define ImageSource_h
#include "platform/PlatformExport.h"
#include "platform/graphics/ColorBehavior.h"
#include "platform/graphics/DeferredImageDecoder.h"
#include "platform/graphics/ImageOrientation.h"
#include "third_party/skia/include/core/SkRefCnt.h"
#include "wtf/Forward.h"
#include "wtf/Noncopyable.h"
#include <memory>
class SkImage;
namespace blink {
class ImageOrientation;
class IntPoint;
class IntSize;
class SharedBuffer;
class PLATFORM_EXPORT ImageSource final {
USING_FAST_MALLOC(ImageSource);
WTF_MAKE_NONCOPYABLE(ImageSource);
public:
ImageSource();
~ImageSource();
// Tells the ImageSource that the Image no longer cares about decoded frame
// data except for the specified frame. Callers may pass WTF::kNotFound to
// clear all frames.
//
// In response, the ImageSource should delete cached decoded data for other
// frames where possible to keep memory use low. The expectation is that in
// the future, the caller may call createFrameAtIndex() with an index larger
// than the one passed to this function, and the implementation may then
// make use of the preserved frame data here in decoding that frame.
// By contrast, callers who call this function and then later ask for an
// earlier frame may require more work to be done, e.g. redecoding the image
// from the beginning.
//
// Implementations may elect to preserve more frames than the one requested
// here if doing so is likely to save CPU time in the future, but will pay
// an increased memory cost to do so.
//
// Returns the number of bytes of frame data actually cleared.
size_t clearCacheExceptFrame(size_t);
PassRefPtr<SharedBuffer> data();
// Returns false when the decoder layer rejects the data.
bool setData(PassRefPtr<SharedBuffer> data, bool allDataReceived);
String filenameExtension() const;
bool isSizeAvailable();
bool hasColorProfile() const;
IntSize size(
RespectImageOrientationEnum = DoNotRespectImageOrientation) const;
IntSize frameSizeAtIndex(
size_t,
RespectImageOrientationEnum = DoNotRespectImageOrientation) const;
bool getHotSpot(IntPoint&) const;
int repetitionCount();
size_t frameCount() const;
// Attempts to create the requested frame.
sk_sp<SkImage> createFrameAtIndex(size_t, const ColorBehavior&);
float frameDurationAtIndex(size_t) const;
bool frameHasAlphaAtIndex(
size_t) const; // Whether or not the frame actually used any alpha.
bool frameIsCompleteAtIndex(
size_t) const; // Whether or not the frame is fully received.
ImageOrientation orientationAtIndex(size_t) const; // EXIF image orientation
// Returns the number of bytes in the decoded frame. May return 0 if the
// frame has not yet begun to decode.
size_t frameBytesAtIndex(size_t) const;
private:
std::unique_ptr<DeferredImageDecoder> m_decoder;
ColorBehavior m_decoderColorBehavior;
bool m_allDataReceived = false;
};
} // namespace blink
#endif
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