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MIPS: dspr2: added optimization for EmitAlphaRGB

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New dsp function: WebPDispatchAlpha()

Change-Id: I48e539d22471279ec75185759bc68d18b127f716
This commit is contained in:
Djordje Pesut
2014-08-21 19:26:18 +02:00
committed by skal
parent 953acd56a4
commit 0b21c30b1a
8 changed files with 131 additions and 13 deletions
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7
src/dsp/dsp.h
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@ -251,6 +251,13 @@ extern void (*WebPApplyAlphaMultiply)(
extern void (*WebPApplyAlphaMultiply4444)(
uint8_t* rgba4444, int w, int h, int stride);
// Dispatch the values from alpha[] plane to the ARGB destination 'dst'.
// Returns true if alpha[] plane has non-trivial values different from 0xff.
extern int (*WebPDispatchAlpha)(const uint8_t* alpha, int alpha_stride,
int width, int height,
uint8_t* dst, int dst_stride);
// Pre-Multiply operation transforms x into x * A / 255 (where x=Y,R,G or B).
// Un-Multiply operation transforms x into x * 255 / A.