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Some bug-fixes for images with alpha.

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- Fix the off-by-one diff when cropping with simple-filter.
- Fix a bug in incremental decoding in case of alpha.
- In VP8FinishRow(), do not decode alpha when y_start > y_end.
- Correct output of alpha channel for MODE_ARGB.
- Correct output of alpha channel for MODE_RGBA_4444.

Change-Id: I785763a2a704b973cc742ad93ffbb53699d1fc0a
This commit is contained in:
Urvang Joshi
2011-12-07 15:01:35 +05:30
parent 273a12a013
commit 8666a93aae
5 changed files with 84 additions and 10 deletions
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src/dsp/dsp.h
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@ -155,6 +155,7 @@ typedef void (*WebPSampleLinePairFunc)(
uint8_t* top_dst, uint8_t* bottom_dst, int len);
extern const WebPSampleLinePairFunc WebPSamplers[/* MODE_LAST */];
extern const WebPSampleLinePairFunc WebPSamplersKeepAlpha[/* MODE_LAST */];
// YUV444->RGB converters
typedef void (*WebPYUV444Converter)(const uint8_t* y,