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Add WebPReplaceTransparentPixels() in dsp

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with SSE2 implementation.

(Extracted from side experiment)

Change-Id: I62d457fb6643645291cffd6d2d205d4a5ffa4517
This commit is contained in:
Skal
2020-09-05 11:44:59 +02:00
parent 84739717d6
commit 55a080e50a
6 changed files with 49 additions and 22 deletions
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8
src/dsp/alpha_processing.c
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@ -359,6 +359,11 @@ static int HasAlpha32b_C(const uint8_t* src, int length) {
return 0;
}
static void AlphaReplace_C(uint32_t* src, int length, uint32_t color) {
int x;
for (x = 0; x < length; ++x) if ((src[x] >> 24) == 0) src[x] = color;
}
//------------------------------------------------------------------------------
// Simple channel manipulations.
@ -400,6 +405,7 @@ void (*WebPPackRGB)(const uint8_t* r, const uint8_t* g, const uint8_t* b,
int (*WebPHasAlpha8b)(const uint8_t* src, int length);
int (*WebPHasAlpha32b)(const uint8_t* src, int length);
void (*WebPAlphaReplace)(uint32_t* src, int length, uint32_t color);
//------------------------------------------------------------------------------
// Init function
@ -428,6 +434,7 @@ WEBP_DSP_INIT_FUNC(WebPInitAlphaProcessing) {
WebPHasAlpha8b = HasAlpha8b_C;
WebPHasAlpha32b = HasAlpha32b_C;
WebPAlphaReplace = AlphaReplace_C;
// If defined, use CPUInfo() to overwrite some pointers with faster versions.
if (VP8GetCPUInfo != NULL) {
@ -469,4 +476,5 @@ WEBP_DSP_INIT_FUNC(WebPInitAlphaProcessing) {
assert(WebPPackRGB != NULL);
assert(WebPHasAlpha8b != NULL);
assert(WebPHasAlpha32b != NULL);
assert(WebPAlphaReplace != NULL);
}