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(svn r26222) -Codechange: use SSE instructions for transparent colour "remap" in the SSE2/SSSE3 blitters as well

This commit is contained in:
rubidium 2014-01-03 18:03:14 +00:00
parent 613fb9c6ef
commit 115c712f4e
2 changed files with 73 additions and 21 deletions
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49
src/blitter/32bpp_sse2.cpp
View File

@ -44,7 +44,8 @@ inline void Blitter_32bppSSE2::Draw(const Blitter::BlitterParams *bp, ZoomLevel
}
/* Load these variables into register before loop. */
const __m128i clear_hi = CLEAR_HIGH_BYTE_MASK;
const __m128i clear_hi = CLEAR_HIGH_BYTE_MASK;
const __m128i tr_nom_base = TRANSPARENT_NOM_BASE;
for (int y = bp->height; y != 0; y--) {
Colour *dst = dst_line;
@ -143,18 +144,44 @@ inline void Blitter_32bppSSE2::Draw(const Blitter::BlitterParams *bp, ZoomLevel
src_mv_line += si->sprite_width;
break;
}
case BM_TRANSPARENT:
/* Make the current colour a bit more black, so it looks like this image is transparent */
for (int x = bp->width; x != 0; x--) {
if (src->a == 255) {
*dst = MakeTransparent(*dst, 3, 4);
} else {
*dst = MakeTransparent(*dst, (256 * 4 - src->a), 256 * 4);
}
dst++;
src++;
case BM_TRANSPARENT: {
/* Make the current colour a bit more black, so it looks like this image is transparent.
* rgb = rgb * ((256/4) * 4 - (alpha/4)) / ((256/4) * 4)
*/
__m128i srcABCD = _mm_loadu_si128((const __m128i*) src);
__m128i dstABCD = _mm_loadu_si128((__m128i*) dst);
for (uint x = (uint) bp->width / 2; x > 0; x--) {
__m128i srcAB = _mm_unpacklo_epi8(srcABCD, _mm_setzero_si128());
__m128i dstAB = _mm_unpacklo_epi8(dstABCD, _mm_setzero_si128());
__m128i dstCD = _mm_unpackhi_epi8(dstABCD, _mm_setzero_si128());
__m128i alphaAB = _mm_shufflelo_epi16(srcAB, 0x3F);
alphaAB = _mm_shufflehi_epi16(alphaAB, 0x3F);
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, dstCD);
Colour *old_dst = dst;
src += 2;
dst += 2;
dstABCD = _mm_loadu_si128((__m128i*) dst);
_mm_storeu_si128((__m128i *) old_dst, dstAB);
srcABCD = _mm_loadu_si128((const __m128i*) src);
}
if (bp->width & 1) {
__m128i srcAB = _mm_unpacklo_epi8(srcABCD, _mm_setzero_si128());
__m128i dstAB = _mm_unpacklo_epi8(dstABCD, _mm_setzero_si128());
__m128i alphaAB = _mm_shufflelo_epi16(srcAB, 0x3F);
alphaAB = _mm_shufflehi_epi16(alphaAB, 0x3F);
alphaAB = _mm_srli_epi16(alphaAB, 2);
__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);
(*dst).data = EXTR32(dstAB, 0);
}
break;
}
}
src_rgba_line = (const Colour*) ((const byte*) src_rgba_line + si->sprite_line_size);

45
src/blitter/32bpp_ssse3.cpp
View File

@ -56,6 +56,7 @@ inline void Blitter_32bppSSSE3::Draw(const Blitter::BlitterParams *bp, ZoomLevel
const __m128i ob_check = OVERBRIGHT_PRESENCE_MASK;
const __m128i ob_mask = OVERBRIGHT_VALUE_MASK;
const __m128i ob_cm = OVERBRIGHT_CONTROL_MASK;
const __m128i tr_nom_base = TRANSPARENT_NOM_BASE;
for (int y = bp->height; y != 0; y--) {
Colour *dst = dst_line;
@ -199,18 +200,42 @@ inline void Blitter_32bppSSSE3::Draw(const Blitter::BlitterParams *bp, ZoomLevel
src_mv_line += si->sprite_width;
break;
}
case BM_TRANSPARENT:
/* Make the current colour a bit more black, so it looks like this image is transparent */
for (int x = bp->width; x != 0; x--) {
if (src->a == 255) {
*dst = MakeTransparent(*dst, 3, 4);
} else {
*dst = MakeTransparent(*dst, (256 * 4 - src->a), 256 * 4);
}
dst++;
src++;
case BM_TRANSPARENT: {
/* Make the current colour a bit more black, so it looks like this image is transparent.
* rgb = rgb * ((256/4) * 4 - (alpha/4)) / ((256/4) * 4)
*/
__m128i srcABCD = _mm_loadu_si128((const __m128i*) src);
__m128i dstABCD = _mm_loadu_si128((__m128i*) dst);
for (uint x = (uint) bp->width / 2; x > 0; x--) {
__m128i srcAB = _mm_unpacklo_epi8(srcABCD, _mm_setzero_si128());
__m128i dstAB = _mm_unpacklo_epi8(dstABCD, _mm_setzero_si128());
__m128i dstCD = _mm_unpackhi_epi8(dstABCD, _mm_setzero_si128());
__m128i alphaAB = _mm_shuffle_epi8(srcAB, a_cm);
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, dstCD);
Colour *old_dst = dst;
src += 2;
dst += 2;
dstABCD = _mm_loadu_si128((__m128i*) dst);
_mm_storeu_si128((__m128i *) old_dst, dstAB);
srcABCD = _mm_loadu_si128((const __m128i*) src);
}
if (bp->width & 1) {
__m128i srcAB = _mm_unpacklo_epi8(srcABCD, _mm_setzero_si128());
__m128i dstAB = _mm_unpacklo_epi8(dstABCD, _mm_setzero_si128());
__m128i alphaAB = _mm_shuffle_epi8(srcAB, a_cm);
alphaAB = _mm_srli_epi16(alphaAB, 2);
__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);
(*dst).data = EXTR32(dstAB, 0);
}
break;
}
}
src_rgba_line = (const Colour*) ((const byte*) src_rgba_line + si->sprite_line_size);