Index: third_party/WebKit/Source/platform/image-decoders/gif/GIFImageDecoder.h |
diff --git a/third_party/WebKit/Source/platform/image-decoders/gif/GIFImageDecoder.h b/third_party/WebKit/Source/platform/image-decoders/gif/GIFImageDecoder.h |
index 54069d7b98c417e78eff4839e65c62644015efac..8a7e129ee20d7e5342cc6cac5228c852000d8673 100644 |
--- a/third_party/WebKit/Source/platform/image-decoders/gif/GIFImageDecoder.h |
+++ b/third_party/WebKit/Source/platform/image-decoders/gif/GIFImageDecoder.h |
@@ -29,12 +29,12 @@ |
#include <memory> |
#include "platform/image-decoders/ImageDecoder.h" |
#include "platform/wtf/Noncopyable.h" |
+#include "platform/wtf/RefPtr.h" |
+#include "third_party/skia/include/codec/SkCodec.h" |
namespace blink { |
-class GIFImageReader; |
- |
-using GIFRow = Vector<unsigned char>; |
+class SegmentStream; |
// This class decodes the GIF image format. |
class PLATFORM_EXPORT GIFImageDecoder final : public ImageDecoder { |
@@ -44,56 +44,42 @@ class PLATFORM_EXPORT GIFImageDecoder final : public ImageDecoder { |
GIFImageDecoder(AlphaOption, const ColorBehavior&, size_t max_decoded_bytes); |
~GIFImageDecoder() override; |
- enum GIFParseQuery { kGIFSizeQuery, kGIFFrameCountQuery }; |
- |
// ImageDecoder: |
String FilenameExtension() const override { return "gif"; } |
void OnSetData(SegmentReader* data) override; |
int RepetitionCount() const override; |
bool FrameIsReceivedAtIndex(size_t) const override; |
float FrameDurationAtIndex(size_t) const override; |
- // CAUTION: SetFailed() deletes |reader_|. Be careful to avoid |
- // accessing deleted memory, especially when calling this from inside |
- // GIFImageReader! |
+ // CAUTION: SetFailed() deletes |codec_|. Be careful to avoid |
+ // accessing deleted memory. |
bool SetFailed() override; |
- // Callbacks from the GIF reader. |
- bool HaveDecodedRow(size_t frame_index, |
- GIFRow::const_iterator row_begin, |
- size_t width, |
- size_t row_number, |
- unsigned repeat_count, |
- bool write_transparent_pixels); |
- bool FrameComplete(size_t frame_index); |
- |
- // For testing. |
- bool ParseCompleted() const; |
+ size_t ClearCacheExceptFrame(size_t) override; |
private: |
// ImageDecoder: |
- void ClearFrameBuffer(size_t frame_index) override; |
- virtual void DecodeSize() { Parse(kGIFSizeQuery); } |
+ void DecodeSize() override {} |
size_t DecodeFrameCount() override; |
void InitializeNewFrame(size_t) override; |
void Decode(size_t) override; |
- |
- // Parses as much as is needed to answer the query, ignoring bitmap |
- // data. If parsing fails, sets the "decode failure" flag. |
- void Parse(GIFParseQuery); |
- |
- // Reset the alpha tracker for this frame. Before calling this method, the |
- // caller must verify that the frame exists. |
- void OnInitFrameBuffer(size_t) override; |
- |
// When the disposal method of the frame is DisposeOverWritePrevious, the |
- // next frame will use the previous frame's buffer as its starting state, so |
+ // next frame will use a previous frame's buffer as its starting state, so |
// we can't take over the data in that case. Before calling this method, the |
// caller must verify that the frame exists. |
bool CanReusePreviousFrameBuffer(size_t) const override; |
- bool current_buffer_saw_alpha_; |
- mutable int repetition_count_; |
- std::unique_ptr<GIFImageReader> reader_; |
+ // When a frame depends on a previous frame's content, there is a list of |
+ // candidate reference frames. This function will find a previous frame from |
+ // that list which satisfies the requirements of being a reference frame |
+ // (kFrameComplete, not kDisposeOverwritePrevious). |
+ // If no frame is found, it returns kNotFound. |
+ size_t GetViableReferenceFrameIndex(size_t) const; |
+ |
+ std::unique_ptr<SkCodec> codec_; |
+ // |codec_| owns the SegmentStream, but we need access to it to append more |
+ // data as it arrives. |
+ SegmentStream* segment_stream_; |
+ mutable int repetition_count_ = kAnimationLoopOnce; |
}; |
} // namespace blink |