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26 #ifndef DecodingImageGenerator_h
27 #define DecodingImageGenerator_h
29 #include "SkImageGenerator.h"
30 #include "SkImageInfo.h"
32 #include "wtf/RefPtr.h"
38 class ImageFrameGenerator;
40 // Implements SkImageGenerator and used by SkPixelRef to populate a discardable
41 // memory with decoded pixels.
43 // This class does not own an ImageDecode. It does not own encoded data. It serves
44 // as and adapter to ImageFrameGenerator which actually performs decoding.
45 class DecodingImageGenerator FINAL : public SkImageGenerator {
47 DecodingImageGenerator(PassRefPtr<ImageFrameGenerator>, const SkImageInfo&, size_t index);
48 virtual ~DecodingImageGenerator();
50 void setGenerationId(size_t id) { m_generationId = id; }
53 virtual SkData* onRefEncodedData() OVERRIDE;
54 virtual bool onGetInfo(SkImageInfo*) OVERRIDE;
55 virtual bool onGetPixels(const SkImageInfo&, void* pixels, size_t rowBytes, SkPMColor ctable[], int* ctableCount) OVERRIDE;
58 RefPtr<ImageFrameGenerator> m_frameGenerator;
59 SkImageInfo m_imageInfo;
61 size_t m_generationId;
66 #endif // DecodingImageGenerator_h_