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SDL_blit_A.c
2269 lines (2033 loc) · 73.1 KB
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2009 Sam Lantinga
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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Sam Lantinga
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slouken@libsdl.org
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*/
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#include "SDL_config.h"
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#include "SDL_video.h"
#include "SDL_blit.h"
/* Functions to perform alpha blended blitting */
/* N->1 blending with per-surface alpha */
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static void
BlitNto1SurfaceAlpha(SDL_BlitInfo * info)
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{
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int width = info->dst_w;
int height = info->dst_h;
Uint8 *src = info->src;
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int srcskip = info->src_skip;
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Uint8 *dst = info->dst;
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int dstskip = info->dst_skip;
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Uint8 *palmap = info->table;
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SDL_PixelFormat *srcfmt = info->src_fmt;
SDL_PixelFormat *dstfmt = info->dst_fmt;
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int srcbpp = srcfmt->BytesPerPixel;
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const unsigned A = info->a;
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while (height--) {
/* *INDENT-OFF* */
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DUFFS_LOOP4(
{
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Uint32 Pixel;
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unsigned sR;
unsigned sG;
unsigned sB;
unsigned dR;
unsigned dG;
unsigned dB;
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DISEMBLE_RGB(src, srcbpp, srcfmt, Pixel, sR, sG, sB);
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dR = dstfmt->palette->colors[*dst].r;
dG = dstfmt->palette->colors[*dst].g;
dB = dstfmt->palette->colors[*dst].b;
ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB);
dR &= 0xff;
dG &= 0xff;
dB &= 0xff;
/* Pack RGB into 8bit pixel */
if ( palmap == NULL ) {
*dst =((dR>>5)<<(3+2))|
((dG>>5)<<(2))|
((dB>>6)<<(0));
} else {
*dst = palmap[((dR>>5)<<(3+2))|
((dG>>5)<<(2)) |
((dB>>6)<<(0))];
}
dst++;
src += srcbpp;
},
width);
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/* *INDENT-ON* */
src += srcskip;
dst += dstskip;
}
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}
/* N->1 blending with pixel alpha */
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static void
BlitNto1PixelAlpha(SDL_BlitInfo * info)
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{
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int width = info->dst_w;
int height = info->dst_h;
Uint8 *src = info->src;
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int srcskip = info->src_skip;
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Uint8 *dst = info->dst;
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int dstskip = info->dst_skip;
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Uint8 *palmap = info->table;
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SDL_PixelFormat *srcfmt = info->src_fmt;
SDL_PixelFormat *dstfmt = info->dst_fmt;
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int srcbpp = srcfmt->BytesPerPixel;
/* FIXME: fix alpha bit field expansion here too? */
while (height--) {
/* *INDENT-OFF* */
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DUFFS_LOOP4(
{
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Uint32 Pixel;
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unsigned sR;
unsigned sG;
unsigned sB;
unsigned sA;
unsigned dR;
unsigned dG;
unsigned dB;
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DISEMBLE_RGBA(src,srcbpp,srcfmt,Pixel,sR,sG,sB,sA);
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dR = dstfmt->palette->colors[*dst].r;
dG = dstfmt->palette->colors[*dst].g;
dB = dstfmt->palette->colors[*dst].b;
ALPHA_BLEND(sR, sG, sB, sA, dR, dG, dB);
dR &= 0xff;
dG &= 0xff;
dB &= 0xff;
/* Pack RGB into 8bit pixel */
if ( palmap == NULL ) {
*dst =((dR>>5)<<(3+2))|
((dG>>5)<<(2))|
((dB>>6)<<(0));
} else {
*dst = palmap[((dR>>5)<<(3+2))|
((dG>>5)<<(2)) |
((dB>>6)<<(0)) ];
}
dst++;
src += srcbpp;
},
width);
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/* *INDENT-ON* */
src += srcskip;
dst += dstskip;
}
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}
/* colorkeyed N->1 blending with per-surface alpha */
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static void
BlitNto1SurfaceAlphaKey(SDL_BlitInfo * info)
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{
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int width = info->dst_w;
int height = info->dst_h;
Uint8 *src = info->src;
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int srcskip = info->src_skip;
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Uint8 *dst = info->dst;
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int dstskip = info->dst_skip;
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Uint8 *palmap = info->table;
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SDL_PixelFormat *srcfmt = info->src_fmt;
SDL_PixelFormat *dstfmt = info->dst_fmt;
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int srcbpp = srcfmt->BytesPerPixel;
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Uint32 ckey = info->colorkey;
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const int A = info->a;
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while (height--) {
/* *INDENT-OFF* */
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DUFFS_LOOP(
{
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Uint32 Pixel;
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unsigned sR;
unsigned sG;
unsigned sB;
unsigned dR;
unsigned dG;
unsigned dB;
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DISEMBLE_RGB(src, srcbpp, srcfmt, Pixel, sR, sG, sB);
if ( Pixel != ckey ) {
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dR = dstfmt->palette->colors[*dst].r;
dG = dstfmt->palette->colors[*dst].g;
dB = dstfmt->palette->colors[*dst].b;
ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB);
dR &= 0xff;
dG &= 0xff;
dB &= 0xff;
/* Pack RGB into 8bit pixel */
if ( palmap == NULL ) {
*dst =((dR>>5)<<(3+2))|
((dG>>5)<<(2)) |
((dB>>6)<<(0));
} else {
*dst = palmap[((dR>>5)<<(3+2))|
((dG>>5)<<(2)) |
((dB>>6)<<(0)) ];
}
}
dst++;
src += srcbpp;
},
width);
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/* *INDENT-ON* */
src += srcskip;
dst += dstskip;
}
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}
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#ifdef __MMX__
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/* fast RGB888->(A)RGB888 blending with surface alpha=128 special case */
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static void
BlitRGBtoRGBSurfaceAlpha128MMX(SDL_BlitInfo * info)
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{
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int width = info->dst_w;
int height = info->dst_h;
Uint32 *srcp = (Uint32 *) info->src;
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int srcskip = info->src_skip >> 2;
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Uint32 *dstp = (Uint32 *) info->dst;
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int dstskip = info->dst_skip >> 2;
Uint32 dalpha = info->dst_fmt->Amask;
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__m64 src1, src2, dst1, dst2, lmask, hmask, dsta;
hmask = _mm_set_pi32(0x00fefefe, 0x00fefefe); /* alpha128 mask -> hmask */
lmask = _mm_set_pi32(0x00010101, 0x00010101); /* !alpha128 mask -> lmask */
dsta = _mm_set_pi32(dalpha, dalpha); /* dst alpha mask -> dsta */
while (height--) {
int n = width;
if (n & 1) {
Uint32 s = *srcp++;
Uint32 d = *dstp;
*dstp++ = ((((s & 0x00fefefe) + (d & 0x00fefefe)) >> 1)
+ (s & d & 0x00010101)) | dalpha;
n--;
}
for (n >>= 1; n > 0; --n) {
dst1 = *(__m64 *) dstp; /* 2 x dst -> dst1(ARGBARGB) */
dst2 = dst1; /* 2 x dst -> dst2(ARGBARGB) */
src1 = *(__m64 *) srcp; /* 2 x src -> src1(ARGBARGB) */
src2 = src1; /* 2 x src -> src2(ARGBARGB) */
dst2 = _mm_and_si64(dst2, hmask); /* dst & mask -> dst2 */
src2 = _mm_and_si64(src2, hmask); /* src & mask -> src2 */
src2 = _mm_add_pi32(src2, dst2); /* dst2 + src2 -> src2 */
src2 = _mm_srli_pi32(src2, 1); /* src2 >> 1 -> src2 */
dst1 = _mm_and_si64(dst1, src1); /* src & dst -> dst1 */
dst1 = _mm_and_si64(dst1, lmask); /* dst1 & !mask -> dst1 */
dst1 = _mm_add_pi32(dst1, src2); /* src2 + dst1 -> dst1 */
dst1 = _mm_or_si64(dst1, dsta); /* dsta(full alpha) | dst1 -> dst1 */
*(__m64 *) dstp = dst1; /* dst1 -> 2 x dst pixels */
dstp += 2;
srcp += 2;
}
srcp += srcskip;
dstp += dstskip;
}
_mm_empty();
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}
/* fast RGB888->(A)RGB888 blending with surface alpha */
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static void
BlitRGBtoRGBSurfaceAlphaMMX(SDL_BlitInfo * info)
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{
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SDL_PixelFormat *df = info->dst_fmt;
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Uint32 chanmask = df->Rmask | df->Gmask | df->Bmask;
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unsigned alpha = info->a;
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if (alpha == 128 && (df->Rmask | df->Gmask | df->Bmask) == 0x00FFFFFF) {
/* only call a128 version when R,G,B occupy lower bits */
BlitRGBtoRGBSurfaceAlpha128MMX(info);
} else {
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int width = info->dst_w;
int height = info->dst_h;
Uint32 *srcp = (Uint32 *) info->src;
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int srcskip = info->src_skip >> 2;
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Uint32 *dstp = (Uint32 *) info->dst;
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int dstskip = info->dst_skip >> 2;
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Uint32 dalpha = df->Amask;
Uint32 amult;
__m64 src1, src2, dst1, dst2, mm_alpha, mm_zero, dsta;
mm_zero = _mm_setzero_si64(); /* 0 -> mm_zero */
/* form the alpha mult */
amult = alpha | (alpha << 8);
amult = amult | (amult << 16);
chanmask =
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(0xff << df->Rshift) | (0xff << df->
Gshift) | (0xff << df->Bshift);
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mm_alpha = _mm_set_pi32(0, amult & chanmask); /* 0000AAAA -> mm_alpha, minus 1 chan */
mm_alpha = _mm_unpacklo_pi8(mm_alpha, mm_zero); /* 0A0A0A0A -> mm_alpha, minus 1 chan */
/* at this point mm_alpha can be 000A0A0A or 0A0A0A00 or another combo */
dsta = _mm_set_pi32(dalpha, dalpha); /* dst alpha mask -> dsta */
while (height--) {
int n = width;
if (n & 1) {
/* One Pixel Blend */
src2 = _mm_cvtsi32_si64(*srcp); /* src(ARGB) -> src2 (0000ARGB) */
src2 = _mm_unpacklo_pi8(src2, mm_zero); /* 0A0R0G0B -> src2 */
dst1 = _mm_cvtsi32_si64(*dstp); /* dst(ARGB) -> dst1 (0000ARGB) */
dst1 = _mm_unpacklo_pi8(dst1, mm_zero); /* 0A0R0G0B -> dst1 */
src2 = _mm_sub_pi16(src2, dst1); /* src2 - dst2 -> src2 */
src2 = _mm_mullo_pi16(src2, mm_alpha); /* src2 * alpha -> src2 */
src2 = _mm_srli_pi16(src2, 8); /* src2 >> 8 -> src2 */
dst1 = _mm_add_pi8(src2, dst1); /* src2 + dst1 -> dst1 */
dst1 = _mm_packs_pu16(dst1, mm_zero); /* 0000ARGB -> dst1 */
dst1 = _mm_or_si64(dst1, dsta); /* dsta | dst1 -> dst1 */
*dstp = _mm_cvtsi64_si32(dst1); /* dst1 -> pixel */
++srcp;
++dstp;
n--;
}
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for (n >>= 1; n > 0; --n) {
/* Two Pixels Blend */
src1 = *(__m64 *) srcp; /* 2 x src -> src1(ARGBARGB) */
src2 = src1; /* 2 x src -> src2(ARGBARGB) */
src1 = _mm_unpacklo_pi8(src1, mm_zero); /* low - 0A0R0G0B -> src1 */
src2 = _mm_unpackhi_pi8(src2, mm_zero); /* high - 0A0R0G0B -> src2 */
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dst1 = *(__m64 *) dstp; /* 2 x dst -> dst1(ARGBARGB) */
dst2 = dst1; /* 2 x dst -> dst2(ARGBARGB) */
dst1 = _mm_unpacklo_pi8(dst1, mm_zero); /* low - 0A0R0G0B -> dst1 */
dst2 = _mm_unpackhi_pi8(dst2, mm_zero); /* high - 0A0R0G0B -> dst2 */
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src1 = _mm_sub_pi16(src1, dst1); /* src1 - dst1 -> src1 */
src1 = _mm_mullo_pi16(src1, mm_alpha); /* src1 * alpha -> src1 */
src1 = _mm_srli_pi16(src1, 8); /* src1 >> 8 -> src1 */
dst1 = _mm_add_pi8(src1, dst1); /* src1 + dst1(dst1) -> dst1 */
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src2 = _mm_sub_pi16(src2, dst2); /* src2 - dst2 -> src2 */
src2 = _mm_mullo_pi16(src2, mm_alpha); /* src2 * alpha -> src2 */
src2 = _mm_srli_pi16(src2, 8); /* src2 >> 8 -> src2 */
dst2 = _mm_add_pi8(src2, dst2); /* src2 + dst2(dst2) -> dst2 */
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dst1 = _mm_packs_pu16(dst1, dst2); /* 0A0R0G0B(res1), 0A0R0G0B(res2) -> dst1(ARGBARGB) */
dst1 = _mm_or_si64(dst1, dsta); /* dsta | dst1 -> dst1 */
*(__m64 *) dstp = dst1; /* dst1 -> 2 x pixel */
srcp += 2;
dstp += 2;
}
srcp += srcskip;
dstp += dstskip;
}
_mm_empty();
}
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}
/* fast ARGB888->(A)RGB888 blending with pixel alpha */
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static void
BlitRGBtoRGBPixelAlphaMMX(SDL_BlitInfo * info)
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{
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int width = info->dst_w;
int height = info->dst_h;
Uint32 *srcp = (Uint32 *) info->src;
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int srcskip = info->src_skip >> 2;
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Uint32 *dstp = (Uint32 *) info->dst;
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int dstskip = info->dst_skip >> 2;
SDL_PixelFormat *sf = info->src_fmt;
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Uint32 chanmask = sf->Rmask | sf->Gmask | sf->Bmask;
Uint32 amask = sf->Amask;
Uint32 ashift = sf->Ashift;
Uint64 multmask;
__m64 src1, dst1, mm_alpha, mm_zero, dmask;
mm_zero = _mm_setzero_si64(); /* 0 -> mm_zero */
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multmask = 0xFFFF;
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multmask <<= (ashift * 2);
multmask = ~multmask;
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dmask = *(__m64 *) & multmask; /* dst alpha mask -> dmask */
while (height--) {
/* *INDENT-OFF* */
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DUFFS_LOOP4({
Uint32 alpha = *srcp & amask;
if (alpha == 0) {
/* do nothing */
} else if (alpha == amask) {
/* opaque alpha -- copy RGB, keep dst alpha */
*dstp = (*srcp & chanmask) | (*dstp & ~chanmask);
} else {
src1 = _mm_cvtsi32_si64(*srcp); /* src(ARGB) -> src1 (0000ARGB)*/
src1 = _mm_unpacklo_pi8(src1, mm_zero); /* 0A0R0G0B -> src1 */
dst1 = _mm_cvtsi32_si64(*dstp); /* dst(ARGB) -> dst1 (0000ARGB)*/
dst1 = _mm_unpacklo_pi8(dst1, mm_zero); /* 0A0R0G0B -> dst1 */
mm_alpha = _mm_cvtsi32_si64(alpha); /* alpha -> mm_alpha (0000000A) */
mm_alpha = _mm_srli_si64(mm_alpha, ashift); /* mm_alpha >> ashift -> mm_alpha(0000000A) */
mm_alpha = _mm_unpacklo_pi16(mm_alpha, mm_alpha); /* 00000A0A -> mm_alpha */
mm_alpha = _mm_unpacklo_pi32(mm_alpha, mm_alpha); /* 0A0A0A0A -> mm_alpha */
mm_alpha = _mm_and_si64(mm_alpha, dmask); /* 000A0A0A -> mm_alpha, preserve dst alpha on add */
/* blend */
src1 = _mm_sub_pi16(src1, dst1);/* src1 - dst1 -> src1 */
src1 = _mm_mullo_pi16(src1, mm_alpha); /* (src1 - dst1) * alpha -> src1 */
src1 = _mm_srli_pi16(src1, 8); /* src1 >> 8 -> src1(000R0G0B) */
dst1 = _mm_add_pi8(src1, dst1); /* src1 + dst1 -> dst1(0A0R0G0B) */
dst1 = _mm_packs_pu16(dst1, mm_zero); /* 0000ARGB -> dst1 */
*dstp = _mm_cvtsi64_si32(dst1); /* dst1 -> pixel */
}
++srcp;
++dstp;
}, width);
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/* *INDENT-ON* */
srcp += srcskip;
dstp += dstskip;
}
_mm_empty();
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}
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#endif /* __MMX__ */
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#if SDL_ALTIVEC_BLITTERS
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#if __MWERKS__
#pragma altivec_model on
#endif
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#if HAVE_ALTIVEC_H
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#include <altivec.h>
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#endif
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#include <assert.h>
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#if (defined(__MACOSX__) && (__GNUC__ < 4))
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#define VECUINT8_LITERAL(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p) \
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(vector unsigned char) ( a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p )
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#define VECUINT16_LITERAL(a,b,c,d,e,f,g,h) \
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(vector unsigned short) ( a,b,c,d,e,f,g,h )
#else
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#define VECUINT8_LITERAL(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p) \
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(vector unsigned char) { a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p }
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#define VECUINT16_LITERAL(a,b,c,d,e,f,g,h) \
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(vector unsigned short) { a,b,c,d,e,f,g,h }
#endif
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#define UNALIGNED_PTR(x) (((size_t) x) & 0x0000000F)
#define VECPRINT(msg, v) do { \
vector unsigned int tmpvec = (vector unsigned int)(v); \
unsigned int *vp = (unsigned int *)&tmpvec; \
printf("%s = %08X %08X %08X %08X\n", msg, vp[0], vp[1], vp[2], vp[3]); \
} while (0)
/* the permuation vector that takes the high bytes out of all the appropriate shorts
(vector unsigned char)(
0x00, 0x10, 0x02, 0x12,
0x04, 0x14, 0x06, 0x16,
0x08, 0x18, 0x0A, 0x1A,
0x0C, 0x1C, 0x0E, 0x1E );
*/
#define VEC_MERGE_PERMUTE() (vec_add(vec_lvsl(0, (int*)NULL), (vector unsigned char)vec_splat_u16(0x0F)))
#define VEC_U32_24() (vec_add(vec_splat_u32(12), vec_splat_u32(12)))
#define VEC_ALPHA_MASK() ((vector unsigned char)vec_sl((vector unsigned int)vec_splat_s8(-1), VEC_U32_24()))
#define VEC_ALIGNER(src) ((UNALIGNED_PTR(src)) \
? vec_lvsl(0, src) \
: vec_add(vec_lvsl(8, src), vec_splat_u8(8)))
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#define VEC_MULTIPLY_ALPHA(vs, vd, valpha, mergePermute, v1_16, v8_16) do { \
/* vtemp1 contains source AAGGAAGGAAGGAAGG */ \
vector unsigned short vtemp1 = vec_mule(vs, valpha); \
/* vtemp2 contains source RRBBRRBBRRBBRRBB */ \
vector unsigned short vtemp2 = vec_mulo(vs, valpha); \
/* valpha2 is 255-alpha */ \
vector unsigned char valpha2 = vec_nor(valpha, valpha); \
/* vtemp3 contains dest AAGGAAGGAAGGAAGG */ \
vector unsigned short vtemp3 = vec_mule(vd, valpha2); \
/* vtemp4 contains dest RRBBRRBBRRBBRRBB */ \
vector unsigned short vtemp4 = vec_mulo(vd, valpha2); \
/* add source and dest */ \
vtemp1 = vec_add(vtemp1, vtemp3); \
vtemp2 = vec_add(vtemp2, vtemp4); \
/* vtemp1 = (vtemp1 + 1) + ((vtemp1 + 1) >> 8) */ \
vtemp1 = vec_add(vtemp1, v1_16); \
vtemp3 = vec_sr(vtemp1, v8_16); \
vtemp1 = vec_add(vtemp1, vtemp3); \
/* vtemp2 = (vtemp2 + 1) + ((vtemp2 + 1) >> 8) */ \
vtemp2 = vec_add(vtemp2, v1_16); \
vtemp4 = vec_sr(vtemp2, v8_16); \
vtemp2 = vec_add(vtemp2, vtemp4); \
/* (>>8) and get ARGBARGBARGBARGB */ \
vd = (vector unsigned char)vec_perm(vtemp1, vtemp2, mergePermute); \
} while (0)
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/* Calculate the permute vector used for 32->32 swizzling */
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static vector unsigned char
calc_swizzle32(const SDL_PixelFormat * srcfmt, const SDL_PixelFormat * dstfmt)
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{
/*
* We have to assume that the bits that aren't used by other
* colors is alpha, and it's one complete byte, since some formats
* leave alpha with a zero mask, but we should still swizzle the bits.
*/
/* ARGB */
const static struct SDL_PixelFormat default_pixel_format = {
NULL, 0, 0,
0, 0, 0, 0,
16, 8, 0, 24,
505
0x00FF0000, 0x0000FF00, 0x000000FF, 0xFF000000
506
};
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if (!srcfmt) {
srcfmt = &default_pixel_format;
}
if (!dstfmt) {
dstfmt = &default_pixel_format;
}
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const vector unsigned char plus = VECUINT8_LITERAL(0x00, 0x00, 0x00, 0x00,
0x04, 0x04, 0x04, 0x04,
0x08, 0x08, 0x08, 0x08,
0x0C, 0x0C, 0x0C,
0x0C);
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vector unsigned char vswiz;
vector unsigned int srcvec;
#define RESHIFT(X) (3 - ((X) >> 3))
Uint32 rmask = RESHIFT(srcfmt->Rshift) << (dstfmt->Rshift);
Uint32 gmask = RESHIFT(srcfmt->Gshift) << (dstfmt->Gshift);
Uint32 bmask = RESHIFT(srcfmt->Bshift) << (dstfmt->Bshift);
Uint32 amask;
/* Use zero for alpha if either surface doesn't have alpha */
if (dstfmt->Amask) {
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amask =
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((srcfmt->Amask) ? RESHIFT(srcfmt->
Ashift) : 0x10) << (dstfmt->Ashift);
530
} else {
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amask =
0x10101010 & ((dstfmt->Rmask | dstfmt->Gmask | dstfmt->Bmask) ^
0xFFFFFFFF);
534
}
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#undef RESHIFT
((unsigned int *) (char *) &srcvec)[0] = (rmask | gmask | bmask | amask);
vswiz = vec_add(plus, (vector unsigned char) vec_splat(srcvec, 0));
return (vswiz);
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}
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static void
Blit32to565PixelAlphaAltivec(SDL_BlitInfo * info)
543
{
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int height = info->dst_h;
Uint8 *src = (Uint8 *) info->src;
546
int srcskip = info->src_skip;
547
Uint8 *dst = (Uint8 *) info->dst;
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int dstskip = info->dst_skip;
SDL_PixelFormat *srcfmt = info->src_fmt;
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vector unsigned char v0 = vec_splat_u8(0);
vector unsigned short v8_16 = vec_splat_u16(8);
vector unsigned short v1_16 = vec_splat_u16(1);
vector unsigned short v2_16 = vec_splat_u16(2);
vector unsigned short v3_16 = vec_splat_u16(3);
vector unsigned int v8_32 = vec_splat_u32(8);
vector unsigned int v16_32 = vec_add(v8_32, v8_32);
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vector unsigned short v3f =
VECUINT16_LITERAL(0x003f, 0x003f, 0x003f, 0x003f,
0x003f, 0x003f, 0x003f, 0x003f);
vector unsigned short vfc =
VECUINT16_LITERAL(0x00fc, 0x00fc, 0x00fc, 0x00fc,
0x00fc, 0x00fc, 0x00fc, 0x00fc);
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/*
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0x10 - 0x1f is the alpha
0x00 - 0x0e evens are the red
0x01 - 0x0f odds are zero
*/
vector unsigned char vredalpha1 = VECUINT8_LITERAL(0x10, 0x00, 0x01, 0x01,
0x10, 0x02, 0x01, 0x01,
0x10, 0x04, 0x01, 0x01,
0x10, 0x06, 0x01,
0x01);
vector unsigned char vredalpha2 =
(vector unsigned char) (vec_add((vector unsigned int) vredalpha1,
vec_sl(v8_32, v16_32))
);
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/*
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0x00 - 0x0f is ARxx ARxx ARxx ARxx
0x11 - 0x0f odds are blue
*/
vector unsigned char vblue1 = VECUINT8_LITERAL(0x00, 0x01, 0x02, 0x11,
0x04, 0x05, 0x06, 0x13,
0x08, 0x09, 0x0a, 0x15,
0x0c, 0x0d, 0x0e, 0x17);
vector unsigned char vblue2 =
(vector unsigned char) (vec_add((vector unsigned int) vblue1, v8_32)
);
590
/*
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0x00 - 0x0f is ARxB ARxB ARxB ARxB
0x10 - 0x0e evens are green
*/
vector unsigned char vgreen1 = VECUINT8_LITERAL(0x00, 0x01, 0x10, 0x03,
0x04, 0x05, 0x12, 0x07,
0x08, 0x09, 0x14, 0x0b,
0x0c, 0x0d, 0x16, 0x0f);
vector unsigned char vgreen2 =
(vector unsigned
char) (vec_add((vector unsigned int) vgreen1, vec_sl(v8_32, v8_32))
);
vector unsigned char vgmerge = VECUINT8_LITERAL(0x00, 0x02, 0x00, 0x06,
0x00, 0x0a, 0x00, 0x0e,
0x00, 0x12, 0x00, 0x16,
0x00, 0x1a, 0x00, 0x1e);
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vector unsigned char mergePermute = VEC_MERGE_PERMUTE();
vector unsigned char vpermute = calc_swizzle32(srcfmt, NULL);
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vector unsigned char valphaPermute =
vec_and(vec_lvsl(0, (int *) NULL), vec_splat_u8(0xC));
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vector unsigned short vf800 = (vector unsigned short) vec_splat_u8(-7);
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vf800 = vec_sl(vf800, vec_splat_u16(8));
614
while (height--) {
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int extrawidth;
vector unsigned char valigner;
vector unsigned char vsrc;
vector unsigned char voverflow;
619
int width = info->dst_w;
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#define ONE_PIXEL_BLEND(condition, widthvar) \
while (condition) { \
623
Uint32 Pixel; \
624
unsigned sR, sG, sB, dR, dG, dB, sA; \
625
DISEMBLE_RGBA(src, 4, srcfmt, Pixel, sR, sG, sB, sA); \
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if(sA) { \
unsigned short dstpixel = *((unsigned short *)dst); \
dR = (dstpixel >> 8) & 0xf8; \
dG = (dstpixel >> 3) & 0xfc; \
dB = (dstpixel << 3) & 0xf8; \
631
ALPHA_BLEND(sR, sG, sB, sA, dR, dG, dB); \
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*((unsigned short *)dst) = ( \
((dR & 0xf8) << 8) | ((dG & 0xfc) << 3) | (dB >> 3) \
); \
} \
src += 4; \
dst += 2; \
widthvar--; \
}
ONE_PIXEL_BLEND((UNALIGNED_PTR(dst)) && (width), width);
extrawidth = (width % 8);
valigner = VEC_ALIGNER(src);
643
vsrc = (vector unsigned char) vec_ld(0, src);
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width -= extrawidth;
while (width) {
vector unsigned char valpha;
vector unsigned char vsrc1, vsrc2;
vector unsigned char vdst1, vdst2;
vector unsigned short vR, vG, vB;
vector unsigned short vpixel, vrpixel, vgpixel, vbpixel;
/* Load 8 pixels from src as ARGB */
653
voverflow = (vector unsigned char) vec_ld(15, src);
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vsrc = vec_perm(vsrc, voverflow, valigner);
vsrc1 = vec_perm(vsrc, vsrc, vpermute);
src += 16;
657
vsrc = (vector unsigned char) vec_ld(15, src);
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voverflow = vec_perm(voverflow, vsrc, valigner);
vsrc2 = vec_perm(voverflow, voverflow, vpermute);
src += 16;
/* Load 8 pixels from dst as XRGB */
voverflow = vec_ld(0, dst);
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vR = vec_and((vector unsigned short) voverflow, vf800);
vB = vec_sl((vector unsigned short) voverflow, v3_16);
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vG = vec_sl(vB, v2_16);
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vdst1 =
(vector unsigned char) vec_perm((vector unsigned char) vR,
(vector unsigned char) vR,
vredalpha1);
vdst1 = vec_perm(vdst1, (vector unsigned char) vB, vblue1);
vdst1 = vec_perm(vdst1, (vector unsigned char) vG, vgreen1);
vdst2 =
(vector unsigned char) vec_perm((vector unsigned char) vR,
(vector unsigned char) vR,
vredalpha2);
vdst2 = vec_perm(vdst2, (vector unsigned char) vB, vblue2);
vdst2 = vec_perm(vdst2, (vector unsigned char) vG, vgreen2);
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/* Alpha blend 8 pixels as ARGB */
valpha = vec_perm(vsrc1, v0, valphaPermute);
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683
VEC_MULTIPLY_ALPHA(vsrc1, vdst1, valpha, mergePermute, v1_16,
v8_16);
684
valpha = vec_perm(vsrc2, v0, valphaPermute);
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686
VEC_MULTIPLY_ALPHA(vsrc2, vdst2, valpha, mergePermute, v1_16,
v8_16);
687
688
/* Convert 8 pixels to 565 */
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693
vpixel = (vector unsigned short) vec_packpx((vector unsigned int)
vdst1,
(vector unsigned int)
vdst2);
vgpixel = (vector unsigned short) vec_perm(vdst1, vdst2, vgmerge);
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vgpixel = vec_and(vgpixel, vfc);
vgpixel = vec_sl(vgpixel, v3_16);
vrpixel = vec_sl(vpixel, v1_16);
vrpixel = vec_and(vrpixel, vf800);
vbpixel = vec_and(vpixel, v3f);
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vdst1 =
vec_or((vector unsigned char) vrpixel,
(vector unsigned char) vgpixel);
vdst1 = vec_or(vdst1, (vector unsigned char) vbpixel);
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716
/* Store 8 pixels */
vec_st(vdst1, 0, dst);
width -= 8;
dst += 16;
}
ONE_PIXEL_BLEND((extrawidth), extrawidth);
#undef ONE_PIXEL_BLEND
src += srcskip;
dst += dstskip;
}
}
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718
static void
Blit32to32SurfaceAlphaKeyAltivec(SDL_BlitInfo * info)
719
{
720
721
int height = info->dst_h;
Uint32 *srcp = (Uint32 *) info->src;
722
int srcskip = info->src_skip >> 2;
723
Uint32 *dstp = (Uint32 *) info->dst;
724
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727
int dstskip = info->dst_skip >> 2;
SDL_PixelFormat *srcfmt = info->src_fmt;
SDL_PixelFormat *dstfmt = info->dst_fmt;
unsigned sA = info->a;
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unsigned dA = dstfmt->Amask ? SDL_ALPHA_OPAQUE : 0;
Uint32 rgbmask = srcfmt->Rmask | srcfmt->Gmask | srcfmt->Bmask;
730
Uint32 ckey = info->colorkey;
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vector unsigned char mergePermute;
vector unsigned char vsrcPermute;
vector unsigned char vdstPermute;
vector unsigned char vsdstPermute;
vector unsigned char valpha;
vector unsigned char valphamask;
vector unsigned char vbits;
vector unsigned char v0;
vector unsigned short v1;
vector unsigned short v8;
vector unsigned int vckey;
vector unsigned int vrgbmask;
mergePermute = VEC_MERGE_PERMUTE();
v0 = vec_splat_u8(0);
v1 = vec_splat_u16(1);
v8 = vec_splat_u16(8);
/* set the alpha to 255 on the destination surf */
valphamask = VEC_ALPHA_MASK();
vsrcPermute = calc_swizzle32(srcfmt, NULL);
vdstPermute = calc_swizzle32(NULL, dstfmt);
vsdstPermute = calc_swizzle32(dstfmt, NULL);
/* set a vector full of alpha and 255-alpha */
757
((unsigned char *) &valpha)[0] = sA;
758
valpha = vec_splat(valpha, 0);
759
vbits = (vector unsigned char) vec_splat_s8(-1);
760
761
ckey &= rgbmask;
762
((unsigned int *) (char *) &vckey)[0] = ckey;
763
vckey = vec_splat(vckey, 0);
764
((unsigned int *) (char *) &vrgbmask)[0] = rgbmask;
765
766
vrgbmask = vec_splat(vrgbmask, 0);
767
while (height--) {
768
int width = info->dst_w;
769
770
#define ONE_PIXEL_BLEND(condition, widthvar) \
while (condition) { \
771
Uint32 Pixel; \
772
unsigned sR, sG, sB, dR, dG, dB; \
773
774
775
776
RETRIEVE_RGB_PIXEL(((Uint8 *)srcp), 4, Pixel); \
if(sA && Pixel != ckey) { \
RGB_FROM_PIXEL(Pixel, srcfmt, sR, sG, sB); \
DISEMBLE_RGB(((Uint8 *)dstp), 4, dstfmt, Pixel, dR, dG, dB); \
777
ALPHA_BLEND(sR, sG, sB, sA, dR, dG, dB); \
778
779
ASSEMBLE_RGBA(((Uint8 *)dstp), 4, dstfmt, dR, dG, dB, dA); \
} \
780
781
dstp++; \
srcp++; \
782
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784
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786
787
widthvar--; \
}
ONE_PIXEL_BLEND((UNALIGNED_PTR(dstp)) && (width), width);
if (width > 0) {
int extrawidth = (width % 4);
vector unsigned char valigner = VEC_ALIGNER(srcp);
788
vector unsigned char vs = (vector unsigned char) vec_ld(0, srcp);
789
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791
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795
796
width -= extrawidth;
while (width) {
vector unsigned char vsel;
vector unsigned char voverflow;
vector unsigned char vd;
vector unsigned char vd_orig;
/* s = *srcp */
797
voverflow = (vector unsigned char) vec_ld(15, srcp);
798
vs = vec_perm(vs, voverflow, valigner);
799
800
/* vsel is set for items that match the key */
801
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803
804
805
vsel =
(vector unsigned char) vec_and((vector unsigned int) vs,
vrgbmask);
vsel = (vector unsigned char) vec_cmpeq((vector unsigned int)
vsel, vckey);
806
807
808
809
810
/* permute to source format */
vs = vec_perm(vs, valpha, vsrcPermute);
/* d = *dstp */
811
vd = (vector unsigned char) vec_ld(0, dstp);
812
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814
815
816
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819
820
vd_orig = vd = vec_perm(vd, v0, vsdstPermute);
VEC_MULTIPLY_ALPHA(vs, vd, valpha, mergePermute, v1, v8);
/* set the alpha channel to full on */
vd = vec_or(vd, valphamask);
/* mask out color key */
vd = vec_sel(vd, vd_orig, vsel);
821
822
823
824
825
/* permute to dest format */
vd = vec_perm(vd, vbits, vdstPermute);
/* *dstp = res */
826
827
vec_st((vector unsigned int) vd, 0, dstp);
828
829
830
831
832
833
834
835
srcp += 4;
dstp += 4;
width -= 4;
vs = voverflow;
}
ONE_PIXEL_BLEND((extrawidth), extrawidth);
}
#undef ONE_PIXEL_BLEND
836
837
838
839
840
841
842
srcp += srcskip;
dstp += dstskip;
}
}
843
844
static void
Blit32to32PixelAlphaAltivec(SDL_BlitInfo * info)
845
{
846
847
848
int width = info->dst_w;
int height = info->dst_h;
Uint32 *srcp = (Uint32 *) info->src;
849
int srcskip = info->src_skip >> 2;
850
Uint32 *dstp = (Uint32 *) info->dst;
851
852
853
int dstskip = info->dst_skip >> 2;
SDL_PixelFormat *srcfmt = info->src_fmt;
SDL_PixelFormat *dstfmt = info->dst_fmt;
854
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856
857
858
859
860
861
862
863
864
865
866
867
868
869
vector unsigned char mergePermute;
vector unsigned char valphaPermute;
vector unsigned char vsrcPermute;
vector unsigned char vdstPermute;
vector unsigned char vsdstPermute;
vector unsigned char valphamask;
vector unsigned char vpixelmask;
vector unsigned char v0;
vector unsigned short v1;
vector unsigned short v8;
v0 = vec_splat_u8(0);
v1 = vec_splat_u16(1);
v8 = vec_splat_u16(8);
mergePermute = VEC_MERGE_PERMUTE();
valphamask = VEC_ALPHA_MASK();
870
valphaPermute = vec_and(vec_lvsl(0, (int *) NULL), vec_splat_u8(0xC));
871
872
873
874
875
vpixelmask = vec_nor(valphamask, v0);
vsrcPermute = calc_swizzle32(srcfmt, NULL);
vdstPermute = calc_swizzle32(NULL, dstfmt);
vsdstPermute = calc_swizzle32(dstfmt, NULL);
876
while (height--) {
877
width = info->dst_w;
878
#define ONE_PIXEL_BLEND(condition, widthvar) while ((condition)) { \
879
Uint32 Pixel; \
880
unsigned sR, sG, sB, dR, dG, dB, sA, dA; \
881
DISEMBLE_RGBA((Uint8 *)srcp, 4, srcfmt, Pixel, sR, sG, sB, sA); \
882
if(sA) { \
883
DISEMBLE_RGBA((Uint8 *)dstp, 4, dstfmt, Pixel, dR, dG, dB, dA); \
884
ALPHA_BLEND(sR, sG, sB, sA, dR, dG, dB); \
885
886
887
888
889
890
891
892
ASSEMBLE_RGBA((Uint8 *)dstp, 4, dstfmt, dR, dG, dB, dA); \
} \
++srcp; \
++dstp; \
widthvar--; \
}
ONE_PIXEL_BLEND((UNALIGNED_PTR(dstp)) && (width), width);
if (width > 0) {
893
894
/* vsrcPermute */
/* vdstPermute */
895
896
int extrawidth = (width % 4);
vector unsigned char valigner = VEC_ALIGNER(srcp);
897
vector unsigned char vs = (vector unsigned char) vec_ld(0, srcp);
898
899
900
901
902
903
904
width -= extrawidth;
while (width) {
vector unsigned char voverflow;
vector unsigned char vd;
vector unsigned char valpha;
vector unsigned char vdstalpha;
/* s = *srcp */
905
voverflow = (vector unsigned char) vec_ld(15, srcp);
906
907
908
909
vs = vec_perm(vs, voverflow, valigner);
vs = vec_perm(vs, v0, vsrcPermute);
valpha = vec_perm(vs, v0, valphaPermute);
910
911
/* d = *dstp */
912
vd = (vector unsigned char) vec_ld(0, dstp);
913
914
915
916
917
918
919
920
921
922
923
vd = vec_perm(vd, v0, vsdstPermute);
vdstalpha = vec_and(vd, valphamask);
VEC_MULTIPLY_ALPHA(vs, vd, valpha, mergePermute, v1, v8);
/* set the alpha to the dest alpha */
vd = vec_and(vd, vpixelmask);
vd = vec_or(vd, vdstalpha);
vd = vec_perm(vd, v0, vdstPermute);
/* *dstp = res */
924
925
vec_st((vector unsigned int) vd, 0, dstp);
926
927
928
929
930
931
932
933
srcp += 4;
dstp += 4;
width -= 4;
vs = voverflow;
}
ONE_PIXEL_BLEND((extrawidth), extrawidth);
}
934
935
srcp += srcskip;
dstp += dstskip;
936
#undef ONE_PIXEL_BLEND
937
}
938
939
940
}
/* fast ARGB888->(A)RGB888 blending with pixel alpha */
941
942
static void
BlitRGBtoRGBPixelAlphaAltivec(SDL_BlitInfo * info)
943
{
944
945
946
int width = info->dst_w;
int height = info->dst_h;
Uint32 *srcp = (Uint32 *) info->src;
947
int srcskip = info->src_skip >> 2;
948
Uint32 *dstp = (Uint32 *) info->dst;
949
int dstskip = info->dst_skip >> 2;
950
951
952
953
954
955
956
957
958
959
960
961
vector unsigned char mergePermute;
vector unsigned char valphaPermute;
vector unsigned char valphamask;
vector unsigned char vpixelmask;
vector unsigned char v0;
vector unsigned short v1;
vector unsigned short v8;
v0 = vec_splat_u8(0);
v1 = vec_splat_u16(1);
v8 = vec_splat_u16(8);
mergePermute = VEC_MERGE_PERMUTE();
valphamask = VEC_ALPHA_MASK();
962
963
964
valphaPermute = vec_and(vec_lvsl(0, (int *) NULL), vec_splat_u8(0xC));
965
vpixelmask = vec_nor(valphamask, v0);
966
while (height--) {
967
width = info->dst_w;
968
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970
971
972
973
974
975
976
977
978
979
980
981
982
983
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985
986
987
988
989
990
991
992
993
994
995
996
997
998
#define ONE_PIXEL_BLEND(condition, widthvar) \
while ((condition)) { \
Uint32 dalpha; \
Uint32 d; \
Uint32 s1; \
Uint32 d1; \
Uint32 s = *srcp; \
Uint32 alpha = s >> 24; \
if(alpha) { \
if(alpha == SDL_ALPHA_OPAQUE) { \
*dstp = (s & 0x00ffffff) | (*dstp & 0xff000000); \
} else { \
d = *dstp; \
dalpha = d & 0xff000000; \
s1 = s & 0xff00ff; \
d1 = d & 0xff00ff; \
d1 = (d1 + ((s1 - d1) * alpha >> 8)) & 0xff00ff; \
s &= 0xff00; \
d &= 0xff00; \
d = (d + ((s - d) * alpha >> 8)) & 0xff00; \
*dstp = d1 | d | dalpha; \
} \
} \
++srcp; \
++dstp; \
widthvar--; \
}
ONE_PIXEL_BLEND((UNALIGNED_PTR(dstp)) && (width), width);
if (width > 0) {
int extrawidth = (width % 4);
vector unsigned char valigner = VEC_ALIGNER(srcp);
999
vector unsigned char vs = (vector unsigned char) vec_ld(0, srcp);
1000
width -= extrawidth;