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(svn r26250) -Codechange: deduplicate darkening (e.g. shadow) code (MJP)

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rubidium
2014-01-13 17:58:58 +00:00
parent 76661f2c56
commit 6e34672c6c
5 changed files with 24 additions and 75 deletions
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13
src/blitter/32bpp_sse2.hpp
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@@ -81,6 +81,19 @@ typedef union ALIGN(16) um128i {
PACK_AB_WITHOUT_SATURATION(srcAB, srcABCD); \
}
/* Darken 2 pixels.
* rgb = rgb * ((256/4) * 4 - (alpha/4)) / ((256/4) * 4)
*/
#define DARKEN_2() \
__m128i srcAB = _mm_unpacklo_epi8(srcABCD, _mm_setzero_si128()); \
__m128i dstAB = _mm_unpacklo_epi8(dstABCD, _mm_setzero_si128()); \
__m128i PUT_ALPHA_IN_FRONT_OF_RGB(srcAB, alphaAB); \
alphaAB = _mm_srli_epi16(alphaAB, 2); /* Reduce to 64 levels of shades so the max value fits in 16 bits. */ \
__m128i nom = _mm_sub_epi16(tr_nom_base, alphaAB); \
dstAB = _mm_mullo_epi16(dstAB, nom); \
dstAB = _mm_srli_epi16(dstAB, 8); \
dstAB = _mm_packus_epi16(dstAB, dstAB);
/** Base methods for 32bpp SSE blitters. */
class Blitter_32bppSSE_Base {
public: