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Port WebP decoder changes.

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This breaks animated WebP for the moment, but adds QCMS color management and lexer changes.
Tag #831
This commit is contained in:
wolfbeast 2018-11-20 19:59:25 +01:00 • committed by Roy Tam
commit dfe6efae2f
2 changed files with 408 additions and 273 deletions
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56
image/decoders/nsWebPDecoder.h
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@ -16,7 +16,7 @@ namespace mozilla {
namespace image {
class RasterImage;
class nsWebPDecoder : public Decoder
class nsWebPDecoder final : public Decoder
{
public:
virtual ~nsWebPDecoder();
@ -31,34 +31,28 @@ private:
// Decoders should only be instantiated via DecoderFactory.
explicit nsWebPDecoder(RasterImage* aImage);
enum class State
{
WEBP_DATA,
FINISHED_WEBP_DATA
};
void ApplyColorProfile(const char* aProfile, size_t aLength);
LexerTransition<State> ReadHeader(const char* aData, size_t aLength);
LexerTransition<State> ReadPayload(const char* aData, size_t aLength);
LexerTransition<State> FinishedData();
LexerResult UpdateBuffer(SourceBufferIterator& aIterator,
SourceBufferIterator::State aState);
LexerResult ReadData();
LexerResult ReadHeader(WebPDemuxer* aDemuxer, bool aIsComplete);
LexerResult ReadPayload(WebPDemuxer* aDemuxer, bool aIsComplete);
nsresult CreateFrame(const nsIntRect& aFrameRect);
void EndFrame();
nsresult GetDataBuffer(const uint8_t*& aData, size_t& aLength);
nsresult SaveDataBuffer(const uint8_t* aData, size_t aLength);
LexerResult ReadSingle(const uint8_t* aData, size_t aLength,
const IntRect& aFrameRect);
LexerTransition<State> ReadSingle(const uint8_t* aData, size_t aLength,
bool aAppend, const IntRect& aFrameRect);
LexerTransition<State> ReadMultiple(const uint8_t* aData, size_t aLength);
StreamingLexer<State> mLexer;
LexerResult ReadMultiple(WebPDemuxer* aDemuxer, bool aIsComplete);
/// The SurfacePipe used to write to the output surface.
SurfacePipe mPipe;
/// The buffer used to accumulate data until the complete WebP header is received.
Vector<uint8_t> mData;
/// The buffer used to accumulate data until the complete WebP header is
/// received, if and only if the iterator is discontiguous.
Vector<uint8_t> mBufferedData;
/// The libwebp output buffer descriptor pointing to the decoded data.
WebPDecBuffer mBuffer;
@ -78,11 +72,35 @@ private:
/// Surface format for the current frame.
gfx::SurfaceFormat mFormat;
/// Frame rect for the current frame.
IntRect mFrameRect;
/// The last row of decoded pixels written to mPipe.
int mLastRow;
/// Number of decoded frames.
uint32_t mCurrentFrame;
/// Pointer to the start of the contiguous encoded image data.
const uint8_t* mData;
/// Length of data pointed to by mData.
size_t mLength;
/// True if the iterator has reached its end.
bool mIteratorComplete;
/// True if this decoding pass requires a WebPDemuxer.
bool mNeedDemuxer;
/// True if we have setup the color profile for the image.
bool mGotColorProfile;
/// Color management profile from the ICCP chunk in the image.
qcms_profile* mInProfile;
/// Color management transform to apply to image data.
qcms_transform* mTransform;
};
} // namespace image