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(svn r26249) -Codechange: simplify/cleanup ALPHA_BLEND macro (MJP)

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rubidium
2014-01-13 17:57:30 +00:00
parent 31c6e33878
commit 76661f2c56
6 changed files with 49 additions and 52 deletions
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35
src/blitter/32bpp_ssse3.hpp
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@@ -17,37 +17,26 @@
#include "32bpp_sse2.hpp"
#include "tmmintrin.h"
/* Alpha blend 2 pixels. */
#undef ALPHA_BLEND_2
#define ALPHA_BLEND_2(m_pack_mask) { \
__m128i srcAB = _mm_unpacklo_epi8(srcABCD, _mm_setzero_si128()); /* PUNPCKLBW, expand each uint8 into uint16 */ \
__m128i dstAB = _mm_unpacklo_epi8(dstABCD, _mm_setzero_si128()); \
\
__m128i alphaAB = _mm_cmpgt_epi16(srcAB, _mm_setzero_si128()); /* PCMPGTW, if (alpha > 0) a++; */ \
alphaAB = _mm_srli_epi16(alphaAB, 15); \
alphaAB = _mm_add_epi16(alphaAB, srcAB); \
alphaAB = _mm_shuffle_epi8(alphaAB, a_cm); /* PSHUFB, put alpha in front of each rgb */ \
\
srcAB = _mm_sub_epi16(srcAB, dstAB); /* PSUBW, (r - Cr) */ \
srcAB = _mm_mullo_epi16(srcAB, alphaAB); /* PMULLW, a*(r - Cr) */ \
srcAB = _mm_srli_epi16(srcAB, 8); /* PSRLW, a*(r - Cr)/256 */ \
srcAB = _mm_add_epi16(srcAB, dstAB); /* PADDW, a*(r - Cr)/256 + Cr */ \
srcABCD = _mm_shuffle_epi8(srcAB, m_pack_mask); /* PSHUFB, pack 2 Colour (without saturation) */ \
}
/* Use PSHUFB instead of PSHUFHW+PSHUFLW. */
#undef PUT_ALPHA_IN_FRONT_OF_RGB
#define PUT_ALPHA_IN_FRONT_OF_RGB(m_from, m_into) m_into = _mm_shuffle_epi8(m_from, a_cm);
#undef PACK_AB_WITHOUT_SATURATION
#define PACK_AB_WITHOUT_SATURATION(m_from, m_into) m_into = _mm_shuffle_epi8(m_from, pack_low_cm);
/* Adjust brightness of 2 pixels. */
#define ADJUST_BRIGHTNESS_2(colourX2, brightnessX2) \
#define ADJUST_BRIGHTNESS_2(m_colourX2, m_brightnessX2) \
/* The following dataflow differs from the one of AdjustBrightness() only for alpha.
* In order to keep alpha in colAB, insert a 1 in a unused brightness byte (a*1->a).
* OK, not a 1 but DEFAULT_BRIGHTNESS to compensate the div.
*/ \
brightnessX2 &= 0xFF00FF00; \
brightnessX2 += DEFAULT_BRIGHTNESS; \
m_brightnessX2 &= 0xFF00FF00; \
m_brightnessX2 += DEFAULT_BRIGHTNESS; \
\
__m128i zero = _mm_setzero_si128(); \
__m128i colAB = _mm_unpacklo_epi8(colourX2, zero); \
__m128i colAB = _mm_unpacklo_epi8(m_colourX2, zero); \
\
__m128i briAB = _mm_cvtsi32_si128(brightnessX2); \
__m128i briAB = _mm_cvtsi32_si128(m_brightnessX2); \
briAB = _mm_shuffle_epi8(briAB, briAB_cm); /* DEFAULT_BRIGHTNESS in 0, 0x00 in 2. */ \
colAB = _mm_mullo_epi16(colAB, briAB); \
__m128i colAB_ob = _mm_srli_epi16(colAB, 8+7); \
@@ -71,7 +60,7 @@
retAB = _mm_srli_epi16(retAB, 8); /* ob*(255 - rgb)/256 */ \
retAB = _mm_add_epi16(retAB, colAB); /* ob*(255 - rgb)/256 + rgb */ \
\
colourX2 = _mm_packus_epi16(retAB, retAB);
m_colourX2 = _mm_packus_epi16(retAB, retAB);
/** The SSSE3 32 bpp blitter (without palette animation). */
class Blitter_32bppSSSE3 : public Blitter_32bppSSE2 {