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@@ -144,21 +144,11 @@ bmcr_alpha_blend_single:
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break;
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}
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case BM_TRANSPARENT: {
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/* Make the current colour a bit more black, so it looks like this image is transparent.
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* rgb = rgb * ((256/4) * 4 - (alpha/4)) / ((256/4) * 4)
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*/
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/* Make the current colour a bit more black, so it looks like this image is transparent. */
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for (uint x = (uint) bp->width / 2; x > 0; x--) {
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__m128i srcABCD = _mm_loadl_epi64((const __m128i*) src);
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__m128i dstABCD = _mm_loadl_epi64((__m128i*) dst);
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__m128i srcAB = _mm_unpacklo_epi8(srcABCD, _mm_setzero_si128());
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__m128i dstAB = _mm_unpacklo_epi8(dstABCD, _mm_setzero_si128());
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__m128i alphaAB = _mm_shufflelo_epi16(srcAB, 0x3F);
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alphaAB = _mm_shufflehi_epi16(alphaAB, 0x3F);
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alphaAB = _mm_srli_epi16(alphaAB, 2); // Reduce to 64 levels of shades so the max value fits in 16 bits.
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__m128i nom = _mm_sub_epi16(tr_nom_base, alphaAB);
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dstAB = _mm_mullo_epi16(dstAB, nom);
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dstAB = _mm_srli_epi16(dstAB, 8);
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dstAB = _mm_packus_epi16(dstAB, dstAB);
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DARKEN_2();
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_mm_storel_epi64((__m128i *) dst, dstAB);
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src += 2;
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dst += 2;
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@@ -166,15 +156,7 @@ bmcr_alpha_blend_single:
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if (bp->width & 1) {
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__m128i srcABCD = _mm_cvtsi32_si128(src->data);
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__m128i dstABCD = _mm_cvtsi32_si128(dst->data);
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__m128i srcAB = _mm_unpacklo_epi8(srcABCD, _mm_setzero_si128());
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__m128i dstAB = _mm_unpacklo_epi8(dstABCD, _mm_setzero_si128());
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__m128i alphaAB = _mm_shufflelo_epi16(srcAB, 0x3F);
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alphaAB = _mm_shufflehi_epi16(alphaAB, 0x3F);
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alphaAB = _mm_srli_epi16(alphaAB, 2);
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__m128i nom = _mm_sub_epi16(tr_nom_base, alphaAB);
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dstAB = _mm_mullo_epi16(dstAB, nom);
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dstAB = _mm_srli_epi16(dstAB, 8);
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dstAB = _mm_packus_epi16(dstAB, dstAB);
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DARKEN_2();
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dst->data = _mm_cvtsi128_si32(dstAB);
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}
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break;
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