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fix rounding and speedup a bit

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Alexander 2017-08-10 01:23:32 +03:00
parent 7c7d7018b1
commit ca27f8197b
1 changed files with 4 additions and 4 deletions
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8
src/libImaging/Convert.c
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@ -547,8 +547,8 @@ rgba2rgbA(UINT8* out, const UINT8* in, int xsize)
0xff,0,0,0, 0xff,0,0,0, 0xff,0,0,0, 0xff,0,0,0));
mmaf = _mm256_cvtepi32_ps(_mm256_srli_epi32(source, 24));
mmaf = _mm256_mul_ps(_mm256_set1_ps(255 * 256), _mm256_rcp_ps(mmaf));
mma1 = _mm256_cvtps_epi32(_mm256_add_ps(_mm256_set1_ps(0.5), mmaf));
mmaf = _mm256_mul_ps(_mm256_set1_ps(255.5 * 256), _mm256_rcp_ps(mmaf));
mma1 = _mm256_cvtps_epi32(mmaf);
mma0 = _mm256_shuffle_epi8(mma1, _mm256_set_epi8(
5,4,5,4, 5,4,5,4, 1,0,1,0, 1,0,1,0,
@ -582,8 +582,8 @@ rgba2rgbA(UINT8* out, const UINT8* in, int xsize)
0xff,0,0,0, 0xff,0,0,0, 0xff,0,0,0, 0xff,0,0,0));
mmaf = _mm_cvtepi32_ps(_mm_srli_epi32(source, 24));
mmaf = _mm_mul_ps(_mm_set1_ps(255 * 256), _mm_rcp_ps(mmaf));
mma1 = _mm_cvtps_epi32(_mm_add_ps(_mm_set1_ps(0.5), mmaf));
mmaf = _mm_mul_ps(_mm_set1_ps(255.5 * 256), _mm_rcp_ps(mmaf));
mma1 = _mm_cvtps_epi32(mmaf);
mma0 = _mm_shuffle_epi8(mma1, _mm_set_epi8(
5,4,5,4, 5,4,5,4, 1,0,1,0, 1,0,1,0));