Mercurial > sdl-ios-xcode
annotate src/video/SDL_blit_A.c @ 880:9ef41050100c
Date: Tue, 30 Mar 2004 21:26:47 -0600
From: Tyler Montbriand
Subject: [SDL] Opteron MMX patches for SDL_blit.c and SDL_blit_A.c
The inline MMX assembly in SDL_blit.c and SDL_blit_A.c compiles and runs fine
unmodified under AMD Opteron. The inline assembly in SDL_yuv_mmx.c and
SDL_blit_N.c unfortunately isn't directly compatible.
I've included diffs from SDL_blit.c and SDL_blit_A.c that allow the MMX
assembly to be compiled when USE_ASMBLIT, __x86_64__, and __GNUC__ are all
defined. All I had to modify was typedefs, the inline assembly itself wasn't
touched.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sun, 11 Apr 2004 19:47:28 +0000 |
| parents | b8d311d90021 |
| children | ffaaf7ecf685 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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Updated copyright information for 2004 (Happy New Year!)
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3 Copyright (C) 1997-2004 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
| 6 modify it under the terms of the GNU Library General Public | |
| 7 License as published by the Free Software Foundation; either | |
| 8 version 2 of the License, or (at your option) any later version. | |
| 9 | |
| 10 This library is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 Library General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU Library General Public | |
| 16 License along with this library; if not, write to the Free | |
| 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 | |
| 19 Sam Lantinga | |
|
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Updated the source with the correct e-mail address
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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 #ifdef SAVE_RCSID | |
| 24 static char rcsid = | |
| 25 "@(#) $Id$"; | |
| 26 #endif | |
| 27 | |
| 28 #include <stdio.h> | |
| 29 | |
| 30 #include "SDL_types.h" | |
| 31 #include "SDL_video.h" | |
| 32 #include "SDL_blit.h" | |
| 33 | |
|
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34 #if (defined(i386) || defined(__x86_64__)) && defined(__GNUC__) && defined(USE_ASMBLIT) |
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35 #define MMX_ASMBLIT |
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36 #endif |
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37 |
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38 #ifdef MMX_ASMBLIT |
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39 /* Function to check the CPU flags */ |
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40 #include "SDL_cpuinfo.h" |
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41 #include "mmx.h" |
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42 #endif |
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43 |
| 0 | 44 /* Functions to perform alpha blended blitting */ |
| 45 | |
| 46 /* N->1 blending with per-surface alpha */ | |
| 47 static void BlitNto1SurfaceAlpha(SDL_BlitInfo *info) | |
| 48 { | |
| 49 int width = info->d_width; | |
| 50 int height = info->d_height; | |
| 51 Uint8 *src = info->s_pixels; | |
| 52 int srcskip = info->s_skip; | |
| 53 Uint8 *dst = info->d_pixels; | |
| 54 int dstskip = info->d_skip; | |
| 55 Uint8 *palmap = info->table; | |
| 56 SDL_PixelFormat *srcfmt = info->src; | |
| 57 SDL_PixelFormat *dstfmt = info->dst; | |
| 58 int srcbpp = srcfmt->BytesPerPixel; | |
| 59 | |
| 60 const unsigned A = srcfmt->alpha; | |
| 61 | |
| 62 while ( height-- ) { | |
| 63 DUFFS_LOOP4( | |
| 64 { | |
| 65 Uint32 pixel; | |
| 66 unsigned sR; | |
| 67 unsigned sG; | |
| 68 unsigned sB; | |
| 69 unsigned dR; | |
| 70 unsigned dG; | |
| 71 unsigned dB; | |
| 72 DISEMBLE_RGB(src, srcbpp, srcfmt, pixel, sR, sG, sB); | |
| 73 dR = dstfmt->palette->colors[*dst].r; | |
| 74 dG = dstfmt->palette->colors[*dst].g; | |
| 75 dB = dstfmt->palette->colors[*dst].b; | |
| 76 ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB); | |
| 77 dR &= 0xff; | |
| 78 dG &= 0xff; | |
| 79 dB &= 0xff; | |
| 80 /* Pack RGB into 8bit pixel */ | |
| 81 if ( palmap == NULL ) { | |
| 82 *dst =((dR>>5)<<(3+2))| | |
| 83 ((dG>>5)<<(2))| | |
| 84 ((dB>>6)<<(0)); | |
| 85 } else { | |
| 86 *dst = palmap[((dR>>5)<<(3+2))| | |
| 87 ((dG>>5)<<(2)) | | |
| 88 ((dB>>6)<<(0))]; | |
| 89 } | |
| 90 dst++; | |
| 91 src += srcbpp; | |
| 92 }, | |
| 93 width); | |
| 94 src += srcskip; | |
| 95 dst += dstskip; | |
| 96 } | |
| 97 } | |
| 98 | |
| 99 /* N->1 blending with pixel alpha */ | |
| 100 static void BlitNto1PixelAlpha(SDL_BlitInfo *info) | |
| 101 { | |
| 102 int width = info->d_width; | |
| 103 int height = info->d_height; | |
| 104 Uint8 *src = info->s_pixels; | |
| 105 int srcskip = info->s_skip; | |
| 106 Uint8 *dst = info->d_pixels; | |
| 107 int dstskip = info->d_skip; | |
| 108 Uint8 *palmap = info->table; | |
| 109 SDL_PixelFormat *srcfmt = info->src; | |
| 110 SDL_PixelFormat *dstfmt = info->dst; | |
| 111 int srcbpp = srcfmt->BytesPerPixel; | |
| 112 | |
| 113 /* FIXME: fix alpha bit field expansion here too? */ | |
| 114 while ( height-- ) { | |
| 115 DUFFS_LOOP4( | |
| 116 { | |
| 117 Uint32 pixel; | |
| 118 unsigned sR; | |
| 119 unsigned sG; | |
| 120 unsigned sB; | |
| 121 unsigned sA; | |
| 122 unsigned dR; | |
| 123 unsigned dG; | |
| 124 unsigned dB; | |
| 125 DISEMBLE_RGBA(src,srcbpp,srcfmt,pixel,sR,sG,sB,sA); | |
| 126 dR = dstfmt->palette->colors[*dst].r; | |
| 127 dG = dstfmt->palette->colors[*dst].g; | |
| 128 dB = dstfmt->palette->colors[*dst].b; | |
| 129 ALPHA_BLEND(sR, sG, sB, sA, dR, dG, dB); | |
| 130 dR &= 0xff; | |
| 131 dG &= 0xff; | |
| 132 dB &= 0xff; | |
| 133 /* Pack RGB into 8bit pixel */ | |
| 134 if ( palmap == NULL ) { | |
| 135 *dst =((dR>>5)<<(3+2))| | |
| 136 ((dG>>5)<<(2))| | |
| 137 ((dB>>6)<<(0)); | |
| 138 } else { | |
| 139 *dst = palmap[((dR>>5)<<(3+2))| | |
| 140 ((dG>>5)<<(2)) | | |
| 141 ((dB>>6)<<(0)) ]; | |
| 142 } | |
| 143 dst++; | |
| 144 src += srcbpp; | |
| 145 }, | |
| 146 width); | |
| 147 src += srcskip; | |
| 148 dst += dstskip; | |
| 149 } | |
| 150 } | |
| 151 | |
| 152 /* colorkeyed N->1 blending with per-surface alpha */ | |
| 153 static void BlitNto1SurfaceAlphaKey(SDL_BlitInfo *info) | |
| 154 { | |
| 155 int width = info->d_width; | |
| 156 int height = info->d_height; | |
| 157 Uint8 *src = info->s_pixels; | |
| 158 int srcskip = info->s_skip; | |
| 159 Uint8 *dst = info->d_pixels; | |
| 160 int dstskip = info->d_skip; | |
| 161 Uint8 *palmap = info->table; | |
| 162 SDL_PixelFormat *srcfmt = info->src; | |
| 163 SDL_PixelFormat *dstfmt = info->dst; | |
| 164 int srcbpp = srcfmt->BytesPerPixel; | |
| 165 Uint32 ckey = srcfmt->colorkey; | |
| 166 | |
| 167 const int A = srcfmt->alpha; | |
| 168 | |
| 169 while ( height-- ) { | |
| 170 DUFFS_LOOP( | |
| 171 { | |
| 172 Uint32 pixel; | |
| 173 unsigned sR; | |
| 174 unsigned sG; | |
| 175 unsigned sB; | |
| 176 unsigned dR; | |
| 177 unsigned dG; | |
| 178 unsigned dB; | |
| 179 DISEMBLE_RGB(src, srcbpp, srcfmt, pixel, sR, sG, sB); | |
| 180 if ( pixel != ckey ) { | |
| 181 dR = dstfmt->palette->colors[*dst].r; | |
| 182 dG = dstfmt->palette->colors[*dst].g; | |
| 183 dB = dstfmt->palette->colors[*dst].b; | |
| 184 ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB); | |
| 185 dR &= 0xff; | |
| 186 dG &= 0xff; | |
| 187 dB &= 0xff; | |
| 188 /* Pack RGB into 8bit pixel */ | |
| 189 if ( palmap == NULL ) { | |
| 190 *dst =((dR>>5)<<(3+2))| | |
| 191 ((dG>>5)<<(2)) | | |
| 192 ((dB>>6)<<(0)); | |
| 193 } else { | |
| 194 *dst = palmap[((dR>>5)<<(3+2))| | |
| 195 ((dG>>5)<<(2)) | | |
| 196 ((dB>>6)<<(0)) ]; | |
| 197 } | |
| 198 } | |
| 199 dst++; | |
| 200 src += srcbpp; | |
| 201 }, | |
| 202 width); | |
| 203 src += srcskip; | |
| 204 dst += dstskip; | |
| 205 } | |
| 206 } | |
| 207 | |
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208 #ifdef MMX_ASMBLIT |
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209 /* fast RGB888->(A)RGB888 blending with surface alpha=128 special case */ |
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210 static void BlitRGBtoRGBSurfaceAlpha128MMX(SDL_BlitInfo *info) |
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211 { |
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212 int width = info->d_width; |
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213 int height = info->d_height; |
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214 Uint32 *srcp = (Uint32 *)info->s_pixels; |
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215 int srcskip = info->s_skip >> 2; |
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216 Uint32 *dstp = (Uint32 *)info->d_pixels; |
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217 int dstskip = info->d_skip >> 2; |
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218 Uint8 load[8]; |
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219 |
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220 *(Uint64 *)load = 0x00fefefe00fefefeULL;/* alpha128 mask */ |
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221 movq_m2r(*load, mm4); /* alpha128 mask -> mm4 */ |
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222 *(Uint64 *)load = 0x0001010100010101ULL;/* !alpha128 mask */ |
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223 movq_m2r(*load, mm3); /* !alpha128 mask -> mm3 */ |
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224 *(Uint64 *)load = 0xFF000000FF000000ULL;/* dst alpha mask */ |
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225 movq_m2r(*load, mm7); /* dst alpha mask -> mm7 */ |
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226 while(height--) { |
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227 DUFFS_LOOP_DOUBLE2( |
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228 { |
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229 Uint32 s = *srcp++; |
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230 Uint32 d = *dstp; |
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231 *dstp++ = ((((s & 0x00fefefe) + (d & 0x00fefefe)) >> 1) |
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232 + (s & d & 0x00010101)) | 0xff000000; |
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233 },{ |
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234 movq_m2r((*dstp), mm2);/* 2 x dst -> mm2(ARGBARGB) */ |
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235 movq_r2r(mm2, mm6); /* 2 x dst -> mm6(ARGBARGB) */ |
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236 |
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237 movq_m2r((*srcp), mm1);/* 2 x src -> mm1(ARGBARGB) */ |
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238 movq_r2r(mm1, mm5); /* 2 x src -> mm5(ARGBARGB) */ |
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239 |
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240 pand_r2r(mm4, mm6); /* dst & mask -> mm6 */ |
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241 pand_r2r(mm4, mm5); /* src & mask -> mm5 */ |
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242 paddd_r2r(mm6, mm5); /* mm6 + mm5 -> mm5 */ |
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243 psrld_i2r(1, mm5); /* mm5 >> 1 -> mm5 */ |
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244 |
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245 pand_r2r(mm1, mm2); /* src & dst -> mm2 */ |
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246 pand_r2r(mm3, mm2); /* mm2 & !mask -> mm2 */ |
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247 paddd_r2r(mm5, mm2); /* mm5 + mm2 -> mm2 */ |
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248 por_r2r(mm7, mm2); /* mm7(full alpha) | mm2 -> mm2 */ |
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249 movq_r2m(mm2, (*dstp));/* mm2 -> 2 x dst pixels */ |
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250 dstp += 2; |
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251 srcp += 2; |
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252 }, width); |
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253 srcp += srcskip; |
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254 dstp += dstskip; |
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255 } |
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256 emms(); |
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257 } |
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258 |
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259 /* fast RGB888->(A)RGB888 blending with surface alpha */ |
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260 static void BlitRGBtoRGBSurfaceAlphaMMX(SDL_BlitInfo *info) |
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261 { |
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262 unsigned alpha = info->src->alpha; |
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263 if(alpha == 128) { |
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264 BlitRGBtoRGBSurfaceAlpha128MMX(info); |
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265 } else { |
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266 int width = info->d_width; |
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267 int height = info->d_height; |
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268 Uint32 *srcp = (Uint32 *)info->s_pixels; |
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269 int srcskip = info->s_skip >> 2; |
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270 Uint32 *dstp = (Uint32 *)info->d_pixels; |
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271 int dstskip = info->d_skip >> 2; |
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272 Uint8 load[8] = {alpha, alpha, alpha, alpha, |
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273 alpha, alpha, alpha, alpha}; |
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274 |
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275 movq_m2r(*load, mm4); /* alpha -> mm4 */ |
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276 *(Uint64 *)load = 0x00FF00FF00FF00FFULL; |
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277 movq_m2r(*load, mm3); /* mask -> mm3 */ |
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278 pand_r2r(mm3, mm4); /* mm4 & mask -> 0A0A0A0A -> mm4 */ |
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279 *(Uint64 *)load = 0xFF000000FF000000ULL;/* dst alpha mask */ |
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280 movq_m2r(*load, mm7); /* dst alpha mask -> mm7 */ |
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281 |
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282 while(height--) { |
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283 DUFFS_LOOP_DOUBLE2({ |
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284 /* One Pixel Blend */ |
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285 movd_m2r((*srcp), mm1);/* src(ARGB) -> mm1 (0000ARGB)*/ |
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286 punpcklbw_r2r(mm1, mm1); /* AARRGGBB -> mm1 */ |
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287 pand_r2r(mm3, mm1); /* 0A0R0G0B -> mm1 */ |
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288 |
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289 movd_m2r((*dstp), mm2);/* dst(ARGB) -> mm2 (0000ARGB)*/ |
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290 movq_r2r(mm2, mm6);/* dst(ARGB) -> mm6 (0000ARGB)*/ |
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291 punpcklbw_r2r(mm2, mm2); /* AARRGGBB -> mm2 */ |
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292 pand_r2r(mm3, mm2); /* 0A0R0G0B -> mm2 */ |
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293 |
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294 psubw_r2r(mm2, mm1);/* src - dst -> mm1 */ |
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295 pmullw_r2r(mm4, mm1); /* mm1 * alpha -> mm1 */ |
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296 psrlw_i2r(8, mm1); /* mm1 >> 8 -> mm1 */ |
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297 paddw_r2r(mm1, mm2); /* mm1 + mm2(dst) -> mm2 */ |
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298 pand_r2r(mm3, mm2); /* 0A0R0G0B -> mm2 */ |
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299 packuswb_r2r(mm2, mm2); /* ARGBARGB -> mm2 */ |
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300 por_r2r(mm7, mm2); /* mm7(full alpha) | mm2 -> mm2 */ |
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301 movd_r2m(mm2, *dstp);/* mm2 -> pixel */ |
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302 ++srcp; |
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303 ++dstp; |
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304 },{ |
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305 /* Two Pixels Blend */ |
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306 movq_m2r((*srcp), mm0);/* 2 x src -> mm0(ARGBARGB)*/ |
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307 movq_r2r(mm0, mm1); /* 2 x src -> mm1(ARGBARGB) */ |
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308 punpcklbw_r2r(mm0, mm0); /* low - AARRGGBB -> mm0 */ |
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309 pand_r2r(mm3, mm0); /* 0A0R0G0B -> mm0(src1) */ |
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310 punpckhbw_r2r(mm1, mm1); /* high - AARRGGBB -> mm1 */ |
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311 pand_r2r(mm3, mm1); /* 0A0R0G0B -> mm1(src2) */ |
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312 |
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313 movq_m2r((*dstp), mm2);/* 2 x dst -> mm2(ARGBARGB) */ |
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314 movq_r2r(mm2, mm5); /* 2 x dst -> mm5(ARGBARGB) */ |
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315 movq_r2r(mm2, mm6); /* 2 x dst -> mm6(ARGBARGB) */ |
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316 punpcklbw_r2r(mm2, mm2); /* low - AARRGGBB -> mm2 */ |
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317 punpckhbw_r2r(mm6, mm6); /* high - AARRGGBB -> mm6 */ |
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318 pand_r2r(mm3, mm2); /* 0A0R0G0B -> mm2(dst1) */ |
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319 |
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320 psubw_r2r(mm2, mm0);/* src1 - dst1 -> mm0 */ |
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321 pmullw_r2r(mm4, mm0); /* mm0 * alpha -> mm0 */ |
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322 pand_r2r(mm3, mm6); /* 0A0R0G0B -> mm6(dst2) */ |
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323 psrlw_i2r(8, mm0); /* mm0 >> 8 -> mm1 */ |
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324 psubw_r2r(mm6, mm1);/* src2 - dst2 -> mm1 */ |
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325 pmullw_r2r(mm4, mm1); /* mm1 * alpha -> mm1 */ |
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326 paddw_r2r(mm0, mm2); /* mm0 + mm2(dst1) -> mm2 */ |
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327 psrlw_i2r(8, mm1); /* mm1 >> 8 -> mm0 */ |
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328 pand_r2r(mm3, mm2); /* 0A0R0G0B -> mm2 */ |
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329 paddw_r2r(mm1, mm6); /* mm1 + mm6(dst2) -> mm6 */ |
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330 pand_r2r(mm3, mm6); /* 0A0R0G0B -> mm6 */ |
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331 packuswb_r2r(mm2, mm2); /* ARGBARGB -> mm2 */ |
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332 packuswb_r2r(mm6, mm6); /* ARGBARGB -> mm6 */ |
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333 psrlq_i2r(32, mm2); /* mm2 >> 32 -> mm2 */ |
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334 psllq_i2r(32, mm6); /* mm6 << 32 -> mm6 */ |
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335 por_r2r(mm6, mm2); /* mm6 | mm2 -> mm2 */ |
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336 por_r2r(mm7, mm2); /* mm7(full alpha) | mm2 -> mm2 */ |
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337 movq_r2m(mm2, *dstp);/* mm2 -> 2 x pixel */ |
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338 srcp += 2; |
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339 dstp += 2; |
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340 }, width); |
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341 srcp += srcskip; |
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342 dstp += dstskip; |
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343 } |
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344 emms(); |
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345 } |
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346 } |
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347 |
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348 /* fast ARGB888->(A)RGB888 blending with pixel alpha */ |
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349 static void BlitRGBtoRGBPixelAlphaMMX(SDL_BlitInfo *info) |
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350 { |
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351 int width = info->d_width; |
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352 int height = info->d_height; |
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353 Uint32 *srcp = (Uint32 *)info->s_pixels; |
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354 int srcskip = info->s_skip >> 2; |
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355 Uint32 *dstp = (Uint32 *)info->d_pixels; |
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356 int dstskip = info->d_skip >> 2; |
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357 Uint32 alpha = 0; |
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358 Uint8 load[8]; |
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359 |
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360 *(Uint64 *)load = 0x00FF00FF00FF00FFULL; |
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361 movq_m2r(*load, mm3); /* mask -> mm2 */ |
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362 *(Uint64 *)load = 0x00FF000000000000ULL; |
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363 movq_m2r(*load, mm7); /* dst alpha mask -> mm2 */ |
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364 *(Uint64 *)load = 0x00FFFFFF00FFFFFFULL; |
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365 movq_m2r(*load, mm0); /* alpha 255 mask -> mm0 */ |
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366 *(Uint64 *)load = 0xFF000000FF000000ULL; |
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367 movq_m2r(*load, mm6); /* alpha 255 !mask -> mm6 */ |
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368 while(height--) { |
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369 DUFFS_LOOP4({ |
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370 alpha = *srcp; |
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371 alpha >>= 24; |
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372 /* FIXME: Here we special-case opaque alpha since the |
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373 compositioning used (>>8 instead of /255) doesn't handle |
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374 it correctly. Also special-case alpha=0 for speed? |
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375 Benchmark this! */ |
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376 if(alpha) { |
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377 if(alpha == SDL_ALPHA_OPAQUE) { |
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378 movd_m2r((*srcp), mm1);/* src(ARGB) -> mm1 (0000ARGB)*/ |
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379 movd_m2r((*dstp), mm2);/* dst(ARGB) -> mm2 (0000ARGB)*/ |
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380 pand_r2r(mm0, mm1); |
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381 pand_r2r(mm6, mm2); |
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382 por_r2r(mm1, mm2); |
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383 movd_r2m(mm2, (*dstp)); |
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384 } else { |
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385 movd_m2r((*srcp), mm1);/* src(ARGB) -> mm1 (0000ARGB)*/ |
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386 punpcklbw_r2r(mm1, mm1); /* AARRGGBB -> mm1 */ |
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387 pand_r2r(mm3, mm1); /* 0A0R0G0B -> mm1 */ |
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388 |
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389 movd_m2r((*dstp), mm2);/* dst(ARGB) -> mm2 (0000ARGB)*/ |
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390 punpcklbw_r2r(mm2, mm2); /* AARRGGBB -> mm2 */ |
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391 pand_r2r(mm3, mm2); /* 0A0R0G0B -> mm2 */ |
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392 |
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393 movq_r2r(mm2, mm5);/* mm2(0A0R0G0B) -> mm5 */ |
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394 pand_r2r(mm7, mm5); /* mm5 & dst alpha mask -> mm5(0A000000) */ |
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395 psrlq_i2r(24, mm5); /* mm5 >> 24 -> mm5 (0000A000)*/ |
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396 |
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397 movq_r2r(mm1, mm4);/* mm1(0A0R0G0B) -> mm4 */ |
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398 psrlq_i2r(48, mm4); /* mm4 >> 48 -> mm4(0000000A) */ |
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399 punpcklwd_r2r(mm4, mm4); /* 00000A0A -> mm4 */ |
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400 punpcklwd_r2r(mm4, mm4); /* 0A0A0A0A -> mm4 */ |
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401 |
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402 /* blend */ |
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403 psubw_r2r(mm2, mm1);/* src - dst -> mm1 */ |
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404 pmullw_r2r(mm4, mm1); /* mm1 * alpha -> mm1 */ |
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405 psrlw_i2r(8, mm1); /* mm1 >> 8 -> mm1 */ |
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406 paddw_r2r(mm1, mm2); /* mm1 + mm2(dst) -> mm2 */ |
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407 pand_r2r(mm3, mm2); /* 0A0R0G0B -> mm2 */ |
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408 packuswb_r2r(mm2, mm2); /* ARGBARGB -> mm2 */ |
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409 pand_r2r(mm0, mm2); /* 0RGB0RGB -> mm2 */ |
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410 por_r2r(mm5, mm2); /* dst alpha | mm2 -> mm2 */ |
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411 movd_r2m(mm2, *dstp);/* mm2 -> dst */ |
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412 } |
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413 } |
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414 ++srcp; |
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415 ++dstp; |
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416 }, width); |
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417 srcp += srcskip; |
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418 dstp += dstskip; |
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419 } |
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420 emms(); |
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421 } |
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422 #endif |
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423 |
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424 /* fast RGB888->(A)RGB888 blending with surface alpha=128 special case */ |
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425 static void BlitRGBtoRGBSurfaceAlpha128(SDL_BlitInfo *info) |
| 0 | 426 { |
| 427 int width = info->d_width; | |
| 428 int height = info->d_height; | |
| 429 Uint32 *srcp = (Uint32 *)info->s_pixels; | |
| 430 int srcskip = info->s_skip >> 2; | |
| 431 Uint32 *dstp = (Uint32 *)info->d_pixels; | |
| 432 int dstskip = info->d_skip >> 2; | |
| 433 | |
| 434 while(height--) { | |
| 435 DUFFS_LOOP4({ | |
|
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436 Uint32 s = *srcp++; |
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437 Uint32 d = *dstp; |
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438 *dstp++ = ((((s & 0x00fefefe) + (d & 0x00fefefe)) >> 1) |
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439 + (s & d & 0x00010101)) | 0xff000000; |
| 0 | 440 }, width); |
| 441 srcp += srcskip; | |
| 442 dstp += dstskip; | |
| 443 } | |
| 444 } | |
| 445 | |
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446 /* fast RGB888->(A)RGB888 blending with surface alpha */ |
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447 static void BlitRGBtoRGBSurfaceAlpha(SDL_BlitInfo *info) |
|
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448 { |
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449 unsigned alpha = info->src->alpha; |
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450 if(alpha == 128) { |
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451 BlitRGBtoRGBSurfaceAlpha128(info); |
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452 } else { |
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453 int width = info->d_width; |
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454 int height = info->d_height; |
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455 Uint32 *srcp = (Uint32 *)info->s_pixels; |
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456 int srcskip = info->s_skip >> 2; |
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457 Uint32 *dstp = (Uint32 *)info->d_pixels; |
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458 int dstskip = info->d_skip >> 2; |
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459 Uint32 s; |
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460 Uint32 d; |
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461 Uint32 s1; |
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462 Uint32 d1; |
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463 |
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464 while(height--) { |
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465 DUFFS_LOOP_DOUBLE2({ |
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466 /* One Pixel Blend */ |
|
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467 s = *srcp; |
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468 d = *dstp; |
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469 s1 = s & 0xff00ff; |
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470 d1 = d & 0xff00ff; |
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471 d1 = (d1 + ((s1 - d1) * alpha >> 8)) |
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472 & 0xff00ff; |
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473 s &= 0xff00; |
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474 d &= 0xff00; |
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475 d = (d + ((s - d) * alpha >> 8)) & 0xff00; |
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476 *dstp = d1 | d | 0xff000000; |
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477 ++srcp; |
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478 ++dstp; |
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479 },{ |
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480 /* Two Pixels Blend */ |
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481 s = *srcp; |
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482 d = *dstp; |
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483 s1 = s & 0xff00ff; |
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484 d1 = d & 0xff00ff; |
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485 d1 += (s1 - d1) * alpha >> 8; |
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486 d1 &= 0xff00ff; |
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487 |
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488 s = ((s & 0xff00) >> 8) | |
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489 ((srcp[1] & 0xff00) << 8); |
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490 d = ((d & 0xff00) >> 8) | |
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491 ((dstp[1] & 0xff00) << 8); |
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492 d += (s - d) * alpha >> 8; |
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493 d &= 0x00ff00ff; |
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494 |
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495 *dstp++ = d1 | ((d << 8) & 0xff00) | 0xff000000; |
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496 ++srcp; |
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497 |
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498 s1 = *srcp; |
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499 d1 = *dstp; |
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500 s1 &= 0xff00ff; |
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501 d1 &= 0xff00ff; |
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502 d1 += (s1 - d1) * alpha >> 8; |
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503 d1 &= 0xff00ff; |
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504 |
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505 *dstp = d1 | ((d >> 8) & 0xff00) | 0xff000000; |
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506 ++srcp; |
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507 ++dstp; |
|
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508 }, width); |
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509 srcp += srcskip; |
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510 dstp += dstskip; |
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511 } |
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512 } |
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513 } |
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514 |
| 0 | 515 /* fast ARGB888->(A)RGB888 blending with pixel alpha */ |
| 516 static void BlitRGBtoRGBPixelAlpha(SDL_BlitInfo *info) | |
| 517 { | |
| 518 int width = info->d_width; | |
| 519 int height = info->d_height; | |
| 520 Uint32 *srcp = (Uint32 *)info->s_pixels; | |
| 521 int srcskip = info->s_skip >> 2; | |
| 522 Uint32 *dstp = (Uint32 *)info->d_pixels; | |
| 523 int dstskip = info->d_skip >> 2; | |
| 524 | |
| 525 while(height--) { | |
| 526 DUFFS_LOOP4({ | |
| 527 Uint32 dalpha; | |
| 528 Uint32 d; | |
| 529 Uint32 s1; | |
| 530 Uint32 d1; | |
| 531 Uint32 s = *srcp; | |
| 532 Uint32 alpha = s >> 24; | |
| 533 /* FIXME: Here we special-case opaque alpha since the | |
| 534 compositioning used (>>8 instead of /255) doesn't handle | |
| 535 it correctly. Also special-case alpha=0 for speed? | |
| 536 Benchmark this! */ | |
|
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537 if(alpha) { |
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538 if(alpha == SDL_ALPHA_OPAQUE) { |
| 0 | 539 *dstp = (s & 0x00ffffff) | (*dstp & 0xff000000); |
|
689
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540 } else { |
| 0 | 541 /* |
| 542 * take out the middle component (green), and process | |
| 543 * the other two in parallel. One multiply less. | |
| 544 */ | |
| 545 d = *dstp; | |
| 546 dalpha = d & 0xff000000; | |
| 547 s1 = s & 0xff00ff; | |
| 548 d1 = d & 0xff00ff; | |
| 549 d1 = (d1 + ((s1 - d1) * alpha >> 8)) & 0xff00ff; | |
| 550 s &= 0xff00; | |
| 551 d &= 0xff00; | |
| 552 d = (d + ((s - d) * alpha >> 8)) & 0xff00; | |
| 553 *dstp = d1 | d | dalpha; | |
|
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554 } |
| 0 | 555 } |
| 556 ++srcp; | |
| 557 ++dstp; | |
| 558 }, width); | |
| 559 srcp += srcskip; | |
| 560 dstp += dstskip; | |
| 561 } | |
| 562 } | |
| 563 | |
|
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564 #ifdef MMX_ASMBLIT |
|
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565 /* fast (as in MMX with prefetch) ARGB888->(A)RGB888 blending with pixel alpha */ |
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566 inline static void BlitRGBtoRGBPixelAlphaMMX3DNOW(SDL_BlitInfo *info) |
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567 { |
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568 int width = info->d_width; |
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569 int height = info->d_height; |
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570 Uint32 *srcp = (Uint32 *)info->s_pixels; |
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571 int srcskip = info->s_skip >> 2; |
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572 Uint32 *dstp = (Uint32 *)info->d_pixels; |
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573 int dstskip = info->d_skip >> 2; |
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574 |
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575 Uint32 s; |
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576 Uint32 alpha; |
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577 |
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578 __asm__ ( |
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579 /* make mm6 all zeros. */ |
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580 "pxor %%mm6, %%mm6\n" |
|
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581 |
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582 /* Make a mask to preserve the alpha. */ |
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583 "pcmpeqb %%mm7, %%mm7\n\t" /* mm7(s) = FF FF FF FF | FF FF FF FF */ |
|
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584 "psrlq $16, %%mm7\n\t" /* mm7(s) = 00 00 FF FF | FF FF FF FF */ |
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585 |
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586 : ); |
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587 |
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588 while(height--) { |
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589 |
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590 DUFFS_LOOP4({ |
|
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591 |
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592 __asm__ ( |
|
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593 "prefetch 64(%0)\n" |
|
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594 "prefetch 64(%1)\n" |
|
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595 : : "r" (srcp), "r" (dstp) ); |
|
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596 |
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597 s = *srcp; |
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598 alpha = s >> 24; |
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599 /* FIXME: Here we special-case opaque alpha since the |
|
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600 compositioning used (>>8 instead of /255) doesn't handle |
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601 it correctly. Also special-case alpha=0 for speed? |
|
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602 Benchmark this! */ |
|
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603 |
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604 if(alpha == SDL_ALPHA_OPAQUE) { |
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605 *dstp = (s & 0x00ffffff) | (*dstp & 0xff000000); |
|
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606 } |
|
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607 |
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608 else { |
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609 __asm__ ( |
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610 /* load in the source, and dst. */ |
|
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611 "movd (%0), %%mm0\n" /* mm0(s) = 0 0 0 0 | As Rs Gs Bs */ |
|
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612 "movd (%1), %%mm1\n" /* mm1(d) = 0 0 0 0 | Ad Rd Gd Bd */ |
|
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613 |
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614 /* Move the src alpha into mm2 */ |
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615 |
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616 /* if supporting pshufw */ |
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617 /*"pshufw $0x55, %%mm0, %%mm2\n" */ /* mm2 = 0 As 0 As | 0 As 0 As */ |
|
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618 /*"psrlw $8, %%mm2\n" */ |
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619 |
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620 /* else: */ |
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621 "movq %%mm0, %%mm2\n" |
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622 "psrld $24, %%mm2\n" /* mm2 = 0 0 0 0 | 0 0 0 As */ |
|
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623 "punpcklwd %%mm2, %%mm2\n" /* mm2 = 0 0 0 0 | 0 As 0 As */ |
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624 "punpckldq %%mm2, %%mm2\n" /* mm2 = 0 As 0 As | 0 As 0 As */ |
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625 |
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626 /* move the colors into words. */ |
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627 "punpcklbw %%mm6, %%mm0\n" /* mm0 = 0 As 0 Rs | 0 Gs 0 Bs */ |
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628 "punpcklbw %%mm6, %%mm1\n" /* mm0 = 0 Ad 0 Rd | 0 Gd 0 Bd */ |
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629 |
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630 /* src - dst */ |
|
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631 "psubw %%mm1, %%mm0\n" /* mm0 = As-Ad Rs-Rd | Gs-Gd Bs-Bd */ |
|
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632 |
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633 /* A * (src-dst) */ |
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634 "pmullw %%mm2, %%mm0\n" /* mm0 = As*As-d As*Rs-d | As*Gs-d As*Bs-d */ |
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635 "pand %%mm7, %%mm0\n" /* to preserve dest alpha */ |
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636 "psrlw $8, %%mm0\n" /* mm0 = Ac>>8 Rc>>8 | Gc>>8 Bc>>8 */ |
|
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637 "paddb %%mm1, %%mm0\n" /* mm0 = Ac+Ad Rc+Rd | Gc+Gd Bc+Bd */ |
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638 |
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639 "packuswb %%mm0, %%mm0\n" /* mm0 = | Ac Rc Gc Bc */ |
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640 |
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641 "movd %%mm0, (%1)\n" /* result in mm0 */ |
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642 |
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643 : : "r" (srcp), "r" (dstp) ); |
|
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644 |
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645 } |
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646 ++srcp; |
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647 ++dstp; |
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648 }, width); |
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649 srcp += srcskip; |
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650 dstp += dstskip; |
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651 } |
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652 |
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653 __asm__ ( |
|
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654 "emms\n" |
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655 : ); |
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656 } |
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657 #endif |
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658 |
|
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659 /* 16bpp special case for per-surface alpha=50%: blend 2 pixels in parallel */ |
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660 |
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661 /* blend a single 16 bit pixel at 50% */ |
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662 #define BLEND16_50(d, s, mask) \ |
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663 ((((s & mask) + (d & mask)) >> 1) + (s & d & (~mask & 0xffff))) |
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664 |
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665 /* blend two 16 bit pixels at 50% */ |
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666 #define BLEND2x16_50(d, s, mask) \ |
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667 (((s & (mask | mask << 16)) >> 1) + ((d & (mask | mask << 16)) >> 1) \ |
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668 + (s & d & (~(mask | mask << 16)))) |
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669 |
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670 static void Blit16to16SurfaceAlpha128(SDL_BlitInfo *info, Uint16 mask) |
| 0 | 671 { |
| 672 int width = info->d_width; | |
| 673 int height = info->d_height; | |
| 674 Uint16 *srcp = (Uint16 *)info->s_pixels; | |
| 675 int srcskip = info->s_skip >> 1; | |
| 676 Uint16 *dstp = (Uint16 *)info->d_pixels; | |
| 677 int dstskip = info->d_skip >> 1; | |
| 678 | |
| 679 while(height--) { | |
|
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680 if(((unsigned long)srcp ^ (unsigned long)dstp) & 2) { |
|
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681 /* |
|
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682 * Source and destination not aligned, pipeline it. |
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683 * This is mostly a win for big blits but no loss for |
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684 * small ones |
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685 */ |
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686 Uint32 prev_sw; |
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687 int w = width; |
|
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688 |
|
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689 /* handle odd destination */ |
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690 if((unsigned long)dstp & 2) { |
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691 Uint16 d = *dstp, s = *srcp; |
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692 *dstp = BLEND16_50(d, s, mask); |
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693 dstp++; |
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694 srcp++; |
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695 w--; |
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696 } |
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697 srcp++; /* srcp is now 32-bit aligned */ |
|
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698 |
|
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699 /* bootstrap pipeline with first halfword */ |
|
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700 prev_sw = ((Uint32 *)srcp)[-1]; |
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|
701 |
|
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702 while(w > 1) { |
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703 Uint32 sw, dw, s; |
|
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704 sw = *(Uint32 *)srcp; |
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705 dw = *(Uint32 *)dstp; |
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706 if(SDL_BYTEORDER == SDL_BIG_ENDIAN) |
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707 s = (prev_sw << 16) + (sw >> 16); |
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|
708 else |
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709 s = (prev_sw >> 16) + (sw << 16); |
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710 prev_sw = sw; |
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711 *(Uint32 *)dstp = BLEND2x16_50(dw, s, mask); |
|
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712 dstp += 2; |
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713 srcp += 2; |
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714 w -= 2; |
|
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715 } |
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|
716 |
|
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|
717 /* final pixel if any */ |
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718 if(w) { |
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|
719 Uint16 d = *dstp, s; |
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720 if(SDL_BYTEORDER == SDL_BIG_ENDIAN) |
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721 s = prev_sw; |
|
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|
722 else |
|
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723 s = prev_sw >> 16; |
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724 *dstp = BLEND16_50(d, s, mask); |
|
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|
725 srcp++; |
|
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|
726 dstp++; |
|
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727 } |
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728 srcp += srcskip - 1; |
|
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729 dstp += dstskip; |
|
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730 } else { |
|
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|
731 /* source and destination are aligned */ |
|
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732 int w = width; |
|
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|
733 |
|
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|
734 /* first odd pixel? */ |
|
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|
735 if((unsigned long)srcp & 2) { |
|
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|
736 Uint16 d = *dstp, s = *srcp; |
|
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737 *dstp = BLEND16_50(d, s, mask); |
|
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|
738 srcp++; |
|
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|
739 dstp++; |
|
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|
740 w--; |
|
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|
741 } |
|
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|
742 /* srcp and dstp are now 32-bit aligned */ |
|
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|
743 |
|
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|
744 while(w > 1) { |
|
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|
745 Uint32 sw = *(Uint32 *)srcp; |
|
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|
746 Uint32 dw = *(Uint32 *)dstp; |
|
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|
747 *(Uint32 *)dstp = BLEND2x16_50(dw, sw, mask); |
|
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|
748 srcp += 2; |
|
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|
749 dstp += 2; |
|
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|
750 w -= 2; |
|
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|
751 } |
|
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|
752 |
|
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|
753 /* last odd pixel? */ |
|
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diff
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|
754 if(w) { |
|
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|
755 Uint16 d = *dstp, s = *srcp; |
|
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|
756 *dstp = BLEND16_50(d, s, mask); |
|
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diff
changeset
|
757 srcp++; |
|
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changeset
|
758 dstp++; |
|
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|
759 } |
|
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changeset
|
760 srcp += srcskip; |
|
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|
761 dstp += dstskip; |
|
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|
762 } |
|
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|
763 } |
|
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|
764 } |
|
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|
765 |
|
880
9ef41050100c
Date: Tue, 30 Mar 2004 21:26:47 -0600
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parents:
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diff
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|
766 #ifdef MMX_ASMBLIT |
|
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|
767 /* fast RGB565->RGB565 blending with surface alpha */ |
|
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|
768 static void Blit565to565SurfaceAlphaMMX(SDL_BlitInfo *info) |
|
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769 { |
|
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770 unsigned alpha = info->src->alpha; /* downscale alpha to 5 bits */ |
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771 if(alpha == 128) { |
|
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|
772 Blit16to16SurfaceAlpha128(info, 0xf7de); |
|
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773 } else { |
|
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774 int width = info->d_width; |
|
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775 int height = info->d_height; |
|
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776 Uint16 *srcp = (Uint16 *)info->s_pixels; |
|
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777 int srcskip = info->s_skip >> 1; |
|
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|
778 Uint16 *dstp = (Uint16 *)info->d_pixels; |
|
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779 int dstskip = info->d_skip >> 1; |
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780 Uint32 s, d; |
|
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781 Uint8 load[8]; |
|
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782 |
|
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|
783 alpha &= ~(1+2+4); /* cut alpha to get the exact same behaviour */ |
|
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784 *(Uint64 *)load = alpha; |
|
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785 alpha >>= 3; /* downscale alpha to 5 bits */ |
|
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786 |
|
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787 movq_m2r(*load, mm0); /* alpha(0000000A) -> mm0 */ |
|
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|
788 punpcklwd_r2r(mm0, mm0); /* 00000A0A -> mm0 */ |
|
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789 punpcklwd_r2r(mm0, mm0); /* 0A0A0A0A -> mm0 */ |
|
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790 |
|
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|
791 /* Setup the 565 color channel masks */ |
|
720
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|
792 *(Uint64 *)load = 0xF800F800F800F800ULL; |
|
689
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793 movq_m2r(*load, mm1); /* MASKRED -> mm1 */ |
|
720
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|
794 *(Uint64 *)load = 0x07E007E007E007E0ULL; |
|
689
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|
795 movq_m2r(*load, mm4); /* MASKGREEN -> mm4 */ |
|
720
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|
796 *(Uint64 *)load = 0x001F001F001F001FULL; |
|
689
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|
797 movq_m2r(*load, mm7); /* MASKBLUE -> mm7 */ |
|
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798 while(height--) { |
|
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|
799 DUFFS_LOOP_QUATRO2( |
|
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800 { |
|
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|
801 s = *srcp++; |
|
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802 d = *dstp; |
|
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803 /* |
|
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804 * shift out the middle component (green) to |
|
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|
805 * the high 16 bits, and process all three RGB |
|
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|
806 * components at the same time. |
|
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807 */ |
|
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808 s = (s | s << 16) & 0x07e0f81f; |
|
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809 d = (d | d << 16) & 0x07e0f81f; |
|
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|
810 d += (s - d) * alpha >> 5; |
|
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|
811 d &= 0x07e0f81f; |
|
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|
812 *dstp++ = d | d >> 16; |
|
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813 },{ |
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814 s = *srcp++; |
|
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|
815 d = *dstp; |
|
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|
816 /* |
|
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|
817 * shift out the middle component (green) to |
|
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|
818 * the high 16 bits, and process all three RGB |
|
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|
819 * components at the same time. |
|
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820 */ |
|
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|
821 s = (s | s << 16) & 0x07e0f81f; |
|
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822 d = (d | d << 16) & 0x07e0f81f; |
|
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823 d += (s - d) * alpha >> 5; |
|
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|
824 d &= 0x07e0f81f; |
|
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825 *dstp++ = d | d >> 16; |
|
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826 s = *srcp++; |
|
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|
827 d = *dstp; |
|
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828 /* |
|
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829 * shift out the middle component (green) to |
|
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|
830 * the high 16 bits, and process all three RGB |
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831 * components at the same time. |
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832 */ |
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|
833 s = (s | s << 16) & 0x07e0f81f; |
|
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834 d = (d | d << 16) & 0x07e0f81f; |
|
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|
835 d += (s - d) * alpha >> 5; |
|
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|
836 d &= 0x07e0f81f; |
|
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|
837 *dstp++ = d | d >> 16; |
|
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838 },{ |
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|
839 movq_m2r((*dstp), mm3);/* 4 dst pixels -> mm3 */ |
|
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840 movq_m2r((*srcp), mm2);/* 4 src pixels -> mm2 */ |
|
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841 |
|
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|
842 /* RED */ |
|
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843 movq_r2r(mm2, mm5); /* src -> mm5 */ |
|
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|
844 pand_r2r(mm1 , mm5); /* src & MASKRED -> mm5 */ |
|
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845 psrlq_i2r(11, mm5); /* mm5 >> 11 -> mm5 [000r 000r 000r 000r] */ |
|
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846 |
|
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847 movq_r2r(mm3, mm6); /* dst -> mm6 */ |
|
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848 pand_r2r(mm1 , mm6); /* dst & MASKRED -> mm6 */ |
|
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849 psrlq_i2r(11, mm6); /* mm6 >> 11 -> mm6 [000r 000r 000r 000r] */ |
|
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850 |
|
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851 /* blend */ |
|
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|
852 psubw_r2r(mm6, mm5);/* src - dst -> mm5 */ |
|
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|
853 pmullw_r2r(mm0, mm5); /* mm5 * alpha -> mm5 */ |
|
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|
854 psrlw_i2r(8, mm5); /* mm5 >> 8 -> mm5 */ |
|
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855 paddw_r2r(mm5, mm6); /* mm5 + mm6(dst) -> mm6 */ |
|
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856 psllq_i2r(11, mm6); /* mm6 << 11 -> mm6 */ |
|
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857 pand_r2r(mm1, mm6); /* mm6 & MASKRED -> mm6 */ |
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858 |
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859 movq_r2r(mm4, mm5); /* MASKGREEN -> mm5 */ |
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860 por_r2r(mm7, mm5); /* MASKBLUE | mm5 -> mm5 */ |
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861 pand_r2r(mm5, mm3); /* mm3 & mm5(!MASKRED) -> mm3 */ |
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862 por_r2r(mm6, mm3); /* save new reds in dsts */ |
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863 |
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864 /* green */ |
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865 movq_r2r(mm2, mm5); /* src -> mm5 */ |
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866 pand_r2r(mm4 , mm5); /* src & MASKGREEN -> mm5 */ |
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867 psrlq_i2r(5, mm5); /* mm5 >> 5 -> mm5 [000g 000g 000g 000g] */ |
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868 |
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869 movq_r2r(mm3, mm6); /* dst -> mm6 */ |
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870 pand_r2r(mm4 , mm6); /* dst & MASKGREEN -> mm6 */ |
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871 psrlq_i2r(5, mm6); /* mm6 >> 5 -> mm6 [000g 000g 000g 000g] */ |
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872 |
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873 /* blend */ |
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874 psubw_r2r(mm6, mm5);/* src - dst -> mm5 */ |
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875 pmullw_r2r(mm0, mm5); /* mm5 * alpha -> mm5 */ |
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876 psrlw_i2r(8, mm5); /* mm5 >> 8 -> mm5 */ |
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877 paddw_r2r(mm5, mm6); /* mm5 + mm6(dst) -> mm6 */ |
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878 psllq_i2r(5, mm6); /* mm6 << 5 -> mm6 */ |
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879 pand_r2r(mm4, mm6); /* mm6 & MASKGREEN -> mm6 */ |
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880 |
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881 movq_r2r(mm1, mm5); /* MASKRED -> mm5 */ |
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882 por_r2r(mm7, mm5); /* MASKBLUE | mm5 -> mm5 */ |
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883 pand_r2r(mm5, mm3); /* mm3 & mm5(!MASKGREEN) -> mm3 */ |
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884 por_r2r(mm6, mm3); /* save new greens in dsts */ |
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885 |
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886 /* blue */ |
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887 movq_r2r(mm2, mm5); /* src -> mm5 */ |
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888 pand_r2r(mm7 , mm5); /* src & MASKRED -> mm5[000b 000b 000b 000b] */ |
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889 |
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890 movq_r2r(mm3, mm6); /* dst -> mm6 */ |
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891 pand_r2r(mm7 , mm6); /* dst & MASKBLUE -> mm6[000b 000b 000b 000b] */ |
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892 |
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893 /* blend */ |
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894 psubw_r2r(mm6, mm5);/* src - dst -> mm5 */ |
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895 pmullw_r2r(mm0, mm5); /* mm5 * alpha -> mm5 */ |
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896 psrlw_i2r(8, mm5); /* mm5 >> 8 -> mm5 */ |
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897 paddw_r2r(mm5, mm6); /* mm5 + mm6(dst) -> mm6 */ |
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898 pand_r2r(mm7, mm6); /* mm6 & MASKBLUE -> mm6 */ |
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899 |
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900 movq_r2r(mm1, mm5); /* MASKRED -> mm5 */ |
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901 por_r2r(mm4, mm5); /* MASKGREEN | mm5 -> mm5 */ |
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902 pand_r2r(mm5, mm3); /* mm3 & mm5(!MASKBLUE) -> mm3 */ |
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903 por_r2r(mm6, mm3); /* save new blues in dsts */ |
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904 |
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905 movq_r2m(mm3, *dstp);/* mm3 -> 4 dst pixels */ |
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906 |
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907 srcp += 4; |
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908 dstp += 4; |
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909 }, width); |
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910 srcp += srcskip; |
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911 dstp += dstskip; |
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912 } |
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913 emms(); |
|
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914 } |
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915 } |
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916 |
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917 /* fast RGB555->RGB555 blending with surface alpha */ |
|
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918 static void Blit555to555SurfaceAlphaMMX(SDL_BlitInfo *info) |
|
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919 { |
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920 unsigned alpha = info->src->alpha; /* downscale alpha to 5 bits */ |
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921 if(alpha == 128) { |
|
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922 Blit16to16SurfaceAlpha128(info, 0xfbde); |
|
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923 } else { |
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924 int width = info->d_width; |
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925 int height = info->d_height; |
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926 Uint16 *srcp = (Uint16 *)info->s_pixels; |
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927 int srcskip = info->s_skip >> 1; |
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928 Uint16 *dstp = (Uint16 *)info->d_pixels; |
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929 int dstskip = info->d_skip >> 1; |
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930 Uint32 s, d; |
|
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931 Uint8 load[8]; |
|
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932 |
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933 alpha &= ~(1+2+4); /* cut alpha to get the exact same behaviour */ |
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934 *(Uint64 *)load = alpha; |
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935 alpha >>= 3; /* downscale alpha to 5 bits */ |
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936 |
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937 movq_m2r(*load, mm0); /* alpha(0000000A) -> mm0 */ |
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938 punpcklwd_r2r(mm0, mm0); /* 00000A0A -> mm0 */ |
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939 punpcklwd_r2r(mm0, mm0); /* 0A0A0A0A -> mm0 */ |
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940 |
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941 /* Setup the 555 color channel masks */ |
|
720
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942 *(Uint64 *)load = 0x7C007C007C007C00ULL; |
|
689
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943 movq_m2r(*load, mm1); /* MASKRED -> mm1 */ |
|
720
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944 *(Uint64 *)load = 0x03E003E003E003E0ULL; |
|
689
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945 movq_m2r(*load, mm4); /* MASKGREEN -> mm4 */ |
|
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946 *(Uint64 *)load = 0x001F001F001F001FULL; |
|
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947 movq_m2r(*load, mm7); /* MASKBLUE -> mm7 */ |
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948 while(height--) { |
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949 DUFFS_LOOP_QUATRO2( |
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950 { |
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951 s = *srcp++; |
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952 d = *dstp; |
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953 /* |
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954 * shift out the middle component (green) to |
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955 * the high 16 bits, and process all three RGB |
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956 * components at the same time. |
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957 */ |
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958 s = (s | s << 16) & 0x03e07c1f; |
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959 d = (d | d << 16) & 0x03e07c1f; |
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960 d += (s - d) * alpha >> 5; |
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961 d &= 0x03e07c1f; |
|
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962 *dstp++ = d | d >> 16; |
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963 },{ |
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964 s = *srcp++; |
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965 d = *dstp; |
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966 /* |
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967 * shift out the middle component (green) to |
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968 * the high 16 bits, and process all three RGB |
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969 * components at the same time. |
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970 */ |
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971 s = (s | s << 16) & 0x03e07c1f; |
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972 d = (d | d << 16) & 0x03e07c1f; |
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973 d += (s - d) * alpha >> 5; |
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974 d &= 0x03e07c1f; |
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975 *dstp++ = d | d >> 16; |
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976 s = *srcp++; |
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977 d = *dstp; |
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978 /* |
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979 * shift out the middle component (green) to |
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980 * the high 16 bits, and process all three RGB |
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981 * components at the same time. |
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982 */ |
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983 s = (s | s << 16) & 0x03e07c1f; |
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984 d = (d | d << 16) & 0x03e07c1f; |
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985 d += (s - d) * alpha >> 5; |
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986 d &= 0x03e07c1f; |
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987 *dstp++ = d | d >> 16; |
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988 },{ |
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989 movq_m2r((*dstp), mm3);/* 4 dst pixels -> mm3 */ |
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990 movq_m2r((*srcp), mm2);/* 4 src pixels -> mm2 */ |
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991 |
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992 /* RED */ |
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993 movq_r2r(mm2, mm5); /* src -> mm5 */ |
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994 pand_r2r(mm1 , mm5); /* src & MASKRED -> mm5 */ |
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995 psrlq_i2r(10, mm5); /* mm5 >> 10 -> mm5 [000r 000r 000r 000r] */ |
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996 |
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997 movq_r2r(mm3, mm6); /* dst -> mm6 */ |
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998 pand_r2r(mm1 , mm6); /* dst & MASKRED -> mm6 */ |
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999 psrlq_i2r(10, mm6); /* mm6 >> 10 -> mm6 [000r 000r 000r 000r] */ |
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1000 |
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1001 /* blend */ |
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1002 psubw_r2r(mm6, mm5);/* src - dst -> mm5 */ |
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1003 pmullw_r2r(mm0, mm5); /* mm5 * alpha -> mm5 */ |
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1004 psrlw_i2r(8, mm5); /* mm5 >> 8 -> mm5 */ |
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1005 paddw_r2r(mm5, mm6); /* mm5 + mm6(dst) -> mm6 */ |
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1006 psllq_i2r(10, mm6); /* mm6 << 10 -> mm6 */ |
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1007 pand_r2r(mm1, mm6); /* mm6 & MASKRED -> mm6 */ |
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1008 |
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1009 movq_r2r(mm4, mm5); /* MASKGREEN -> mm5 */ |
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1010 por_r2r(mm7, mm5); /* MASKBLUE | mm5 -> mm5 */ |
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1011 pand_r2r(mm5, mm3); /* mm3 & mm5(!MASKRED) -> mm3 */ |
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1012 por_r2r(mm6, mm3); /* save new reds in dsts */ |
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1013 |
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1014 /* green */ |
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1015 movq_r2r(mm2, mm5); /* src -> mm5 */ |
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1016 pand_r2r(mm4 , mm5); /* src & MASKGREEN -> mm5 */ |
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1017 psrlq_i2r(5, mm5); /* mm5 >> 5 -> mm5 [000g 000g 000g 000g] */ |
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1018 |
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1019 movq_r2r(mm3, mm6); /* dst -> mm6 */ |
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1020 pand_r2r(mm4 , mm6); /* dst & MASKGREEN -> mm6 */ |
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1021 psrlq_i2r(5, mm6); /* mm6 >> 5 -> mm6 [000g 000g 000g 000g] */ |
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1022 |
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1023 /* blend */ |
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1024 psubw_r2r(mm6, mm5);/* src - dst -> mm5 */ |
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1025 pmullw_r2r(mm0, mm5); /* mm5 * alpha -> mm5 */ |
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1026 psrlw_i2r(8, mm5); /* mm5 >> 8 -> mm5 */ |
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1027 paddw_r2r(mm5, mm6); /* mm5 + mm6(dst) -> mm6 */ |
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1028 psllq_i2r(5, mm6); /* mm6 << 5 -> mm6 */ |
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1029 pand_r2r(mm4, mm6); /* mm6 & MASKGREEN -> mm6 */ |
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1030 |
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1031 movq_r2r(mm1, mm5); /* MASKRED -> mm5 */ |
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1032 por_r2r(mm7, mm5); /* MASKBLUE | mm5 -> mm5 */ |
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1033 pand_r2r(mm5, mm3); /* mm3 & mm5(!MASKGREEN) -> mm3 */ |
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1034 por_r2r(mm6, mm3); /* save new greens in dsts */ |
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1035 |
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1036 /* blue */ |
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1037 movq_r2r(mm2, mm5); /* src -> mm5 */ |
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1038 pand_r2r(mm7 , mm5); /* src & MASKRED -> mm5[000b 000b 000b 000b] */ |
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1039 |
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1040 movq_r2r(mm3, mm6); /* dst -> mm6 */ |
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1041 pand_r2r(mm7 , mm6); /* dst & MASKBLUE -> mm6[000b 000b 000b 000b] */ |
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1042 |
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1043 /* blend */ |
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1044 psubw_r2r(mm6, mm5);/* src - dst -> mm5 */ |
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1045 pmullw_r2r(mm0, mm5); /* mm5 * alpha -> mm5 */ |
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1046 psrlw_i2r(8, mm5); /* mm5 >> 8 -> mm5 */ |
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1047 paddw_r2r(mm5, mm6); /* mm5 + mm6(dst) -> mm6 */ |
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1048 pand_r2r(mm7, mm6); /* mm6 & MASKBLUE -> mm6 */ |
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1049 |
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1050 movq_r2r(mm1, mm5); /* MASKRED -> mm5 */ |
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1051 por_r2r(mm4, mm5); /* MASKGREEN | mm5 -> mm5 */ |
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1052 pand_r2r(mm5, mm3); /* mm3 & mm5(!MASKBLUE) -> mm3 */ |
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1053 por_r2r(mm6, mm3); /* save new blues in dsts */ |
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1054 |
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1055 movq_r2m(mm3, *dstp);/* mm3 -> 4 dst pixels */ |
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1056 |
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1057 srcp += 4; |
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1058 dstp += 4; |
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1059 }, width); |
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1060 srcp += srcskip; |
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1061 dstp += dstskip; |
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1062 } |
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1063 emms(); |
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1064 } |
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1065 } |
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1066 #endif |
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1067 |
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1068 /* fast RGB565->RGB565 blending with surface alpha */ |
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1069 static void Blit565to565SurfaceAlpha(SDL_BlitInfo *info) |
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1070 { |
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1071 unsigned alpha = info->src->alpha; |
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1072 if(alpha == 128) { |
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1073 Blit16to16SurfaceAlpha128(info, 0xf7de); |
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1074 } else { |
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1075 int width = info->d_width; |
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1076 int height = info->d_height; |
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1077 Uint16 *srcp = (Uint16 *)info->s_pixels; |
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1078 int srcskip = info->s_skip >> 1; |
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1079 Uint16 *dstp = (Uint16 *)info->d_pixels; |
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1080 int dstskip = info->d_skip >> 1; |
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1081 alpha >>= 3; /* downscale alpha to 5 bits */ |
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1082 |
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1083 while(height--) { |
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1084 DUFFS_LOOP4({ |
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1085 Uint32 s = *srcp++; |
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1086 Uint32 d = *dstp; |
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1087 /* |
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1088 * shift out the middle component (green) to |
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1089 * the high 16 bits, and process all three RGB |
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1090 * components at the same time. |
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1091 */ |
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1092 s = (s | s << 16) & 0x07e0f81f; |
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1093 d = (d | d << 16) & 0x07e0f81f; |
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1094 d += (s - d) * alpha >> 5; |
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1095 d &= 0x07e0f81f; |
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1096 *dstp++ = d | d >> 16; |
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1097 }, width); |
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1098 srcp += srcskip; |
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1099 dstp += dstskip; |
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1100 } |
| 0 | 1101 } |
| 1102 } | |
| 1103 | |
| 1104 /* fast RGB555->RGB555 blending with surface alpha */ | |
| 1105 static void Blit555to555SurfaceAlpha(SDL_BlitInfo *info) | |
| 1106 { | |
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1107 unsigned alpha = info->src->alpha; /* downscale alpha to 5 bits */ |
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1108 if(alpha == 128) { |
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1109 Blit16to16SurfaceAlpha128(info, 0xfbde); |
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1110 } else { |
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1111 int width = info->d_width; |
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1112 int height = info->d_height; |
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1113 Uint16 *srcp = (Uint16 *)info->s_pixels; |
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1114 int srcskip = info->s_skip >> 1; |
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1115 Uint16 *dstp = (Uint16 *)info->d_pixels; |
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1116 int dstskip = info->d_skip >> 1; |
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1117 alpha >>= 3; /* downscale alpha to 5 bits */ |
| 0 | 1118 |
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1119 while(height--) { |
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1120 DUFFS_LOOP4({ |
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1121 Uint32 s = *srcp++; |
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1122 Uint32 d = *dstp; |
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1123 /* |
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1124 * shift out the middle component (green) to |
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1125 * the high 16 bits, and process all three RGB |
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1126 * components at the same time. |
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1127 */ |
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1128 s = (s | s << 16) & 0x03e07c1f; |
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1129 d = (d | d << 16) & 0x03e07c1f; |
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1130 d += (s - d) * alpha >> 5; |
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1131 d &= 0x03e07c1f; |
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1132 *dstp++ = d | d >> 16; |
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1133 }, width); |
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1134 srcp += srcskip; |
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1135 dstp += dstskip; |
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1136 } |
| 0 | 1137 } |
| 1138 } | |
| 1139 | |
| 1140 /* fast ARGB8888->RGB565 blending with pixel alpha */ | |
| 1141 static void BlitARGBto565PixelAlpha(SDL_BlitInfo *info) | |
| 1142 { | |
| 1143 int width = info->d_width; | |
| 1144 int height = info->d_height; | |
| 1145 Uint32 *srcp = (Uint32 *)info->s_pixels; | |
| 1146 int srcskip = info->s_skip >> 2; | |
| 1147 Uint16 *dstp = (Uint16 *)info->d_pixels; | |
| 1148 int dstskip = info->d_skip >> 1; | |
| 1149 | |
| 1150 while(height--) { | |
| 1151 DUFFS_LOOP4({ | |
| 1152 Uint32 s = *srcp; | |
| 1153 unsigned alpha = s >> 27; /* downscale alpha to 5 bits */ | |
| 1154 /* FIXME: Here we special-case opaque alpha since the | |
| 1155 compositioning used (>>8 instead of /255) doesn't handle | |
| 1156 it correctly. Also special-case alpha=0 for speed? | |
| 1157 Benchmark this! */ | |
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1158 if(alpha) { |
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1159 if(alpha == (SDL_ALPHA_OPAQUE >> 3)) { |
| 0 | 1160 *dstp = (s >> 8 & 0xf800) + (s >> 5 & 0x7e0) |
| 1161 + (s >> 3 & 0x1f); | |
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1162 } else { |
| 0 | 1163 Uint32 d = *dstp; |
| 1164 /* | |
| 1165 * convert source and destination to G0RAB65565 | |
| 1166 * and blend all components at the same time | |
| 1167 */ | |
| 1168 s = ((s & 0xfc00) << 11) + (s >> 8 & 0xf800) | |
| 1169 + (s >> 3 & 0x1f); | |
| 1170 d = (d | d << 16) & 0x07e0f81f; | |
| 1171 d += (s - d) * alpha >> 5; | |
| 1172 d &= 0x07e0f81f; | |
| 1173 *dstp = d | d >> 16; | |
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1174 } |
| 0 | 1175 } |
| 1176 srcp++; | |
| 1177 dstp++; | |
| 1178 }, width); | |
| 1179 srcp += srcskip; | |
| 1180 dstp += dstskip; | |
| 1181 } | |
| 1182 } | |
| 1183 | |
| 1184 /* fast ARGB8888->RGB555 blending with pixel alpha */ | |
| 1185 static void BlitARGBto555PixelAlpha(SDL_BlitInfo *info) | |
| 1186 { | |
| 1187 int width = info->d_width; | |
| 1188 int height = info->d_height; | |
| 1189 Uint32 *srcp = (Uint32 *)info->s_pixels; | |
| 1190 int srcskip = info->s_skip >> 2; | |
| 1191 Uint16 *dstp = (Uint16 *)info->d_pixels; | |
| 1192 int dstskip = info->d_skip >> 1; | |
| 1193 | |
| 1194 while(height--) { | |
| 1195 DUFFS_LOOP4({ | |
| 1196 unsigned alpha; | |
| 1197 Uint32 s = *srcp; | |
| 1198 alpha = s >> 27; /* downscale alpha to 5 bits */ | |
| 1199 /* FIXME: Here we special-case opaque alpha since the | |
| 1200 compositioning used (>>8 instead of /255) doesn't handle | |
| 1201 it correctly. Also special-case alpha=0 for speed? | |
| 1202 Benchmark this! */ | |
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1203 if(alpha) { |
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1204 if(alpha == (SDL_ALPHA_OPAQUE >> 3)) { |
| 0 | 1205 *dstp = (s >> 9 & 0x7c00) + (s >> 6 & 0x3e0) |
| 1206 + (s >> 3 & 0x1f); | |
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1207 } else { |
| 0 | 1208 Uint32 d = *dstp; |
| 1209 /* | |
| 1210 * convert source and destination to G0RAB65565 | |
| 1211 * and blend all components at the same time | |
| 1212 */ | |
| 1213 s = ((s & 0xf800) << 10) + (s >> 9 & 0x7c00) | |
| 1214 + (s >> 3 & 0x1f); | |
| 1215 d = (d | d << 16) & 0x03e07c1f; | |
| 1216 d += (s - d) * alpha >> 5; | |
| 1217 d &= 0x03e07c1f; | |
| 1218 *dstp = d | d >> 16; | |
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1219 } |
| 0 | 1220 } |
| 1221 srcp++; | |
| 1222 dstp++; | |
| 1223 }, width); | |
| 1224 srcp += srcskip; | |
| 1225 dstp += dstskip; | |
| 1226 } | |
| 1227 } | |
| 1228 | |
| 1229 /* General (slow) N->N blending with per-surface alpha */ | |
| 1230 static void BlitNtoNSurfaceAlpha(SDL_BlitInfo *info) | |
| 1231 { | |
| 1232 int width = info->d_width; | |
| 1233 int height = info->d_height; | |
| 1234 Uint8 *src = info->s_pixels; | |
| 1235 int srcskip = info->s_skip; | |
| 1236 Uint8 *dst = info->d_pixels; | |
| 1237 int dstskip = info->d_skip; | |
| 1238 SDL_PixelFormat *srcfmt = info->src; | |
| 1239 SDL_PixelFormat *dstfmt = info->dst; | |
| 1240 int srcbpp = srcfmt->BytesPerPixel; | |
| 1241 int dstbpp = dstfmt->BytesPerPixel; | |
| 1242 unsigned sA = srcfmt->alpha; | |
| 1243 unsigned dA = dstfmt->Amask ? SDL_ALPHA_OPAQUE : 0; | |
| 1244 | |
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1245 if(sA) { |
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1246 while ( height-- ) { |
| 0 | 1247 DUFFS_LOOP4( |
| 1248 { | |
| 1249 Uint32 pixel; | |
| 1250 unsigned sR; | |
| 1251 unsigned sG; | |
| 1252 unsigned sB; | |
| 1253 unsigned dR; | |
| 1254 unsigned dG; | |
| 1255 unsigned dB; | |
| 1256 DISEMBLE_RGB(src, srcbpp, srcfmt, pixel, sR, sG, sB); | |
| 1257 DISEMBLE_RGB(dst, dstbpp, dstfmt, pixel, dR, dG, dB); | |
| 1258 ALPHA_BLEND(sR, sG, sB, sA, dR, dG, dB); | |
| 1259 ASSEMBLE_RGBA(dst, dstbpp, dstfmt, dR, dG, dB, dA); | |
| 1260 src += srcbpp; | |
| 1261 dst += dstbpp; | |
| 1262 }, | |
| 1263 width); | |
| 1264 src += srcskip; | |
| 1265 dst += dstskip; | |
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1266 } |
| 0 | 1267 } |
| 1268 } | |
| 1269 | |
| 1270 /* General (slow) colorkeyed N->N blending with per-surface alpha */ | |
| 1271 static void BlitNtoNSurfaceAlphaKey(SDL_BlitInfo *info) | |
| 1272 { | |
| 1273 int width = info->d_width; | |
| 1274 int height = info->d_height; | |
| 1275 Uint8 *src = info->s_pixels; | |
| 1276 int srcskip = info->s_skip; | |
| 1277 Uint8 *dst = info->d_pixels; | |
| 1278 int dstskip = info->d_skip; | |
| 1279 SDL_PixelFormat *srcfmt = info->src; | |
| 1280 SDL_PixelFormat *dstfmt = info->dst; | |
| 1281 Uint32 ckey = srcfmt->colorkey; | |
| 1282 int srcbpp = srcfmt->BytesPerPixel; | |
| 1283 int dstbpp = dstfmt->BytesPerPixel; | |
| 1284 unsigned sA = srcfmt->alpha; | |
| 1285 unsigned dA = dstfmt->Amask ? SDL_ALPHA_OPAQUE : 0; | |
| 1286 | |
| 1287 while ( height-- ) { | |
| 1288 DUFFS_LOOP4( | |
| 1289 { | |
| 1290 Uint32 pixel; | |
| 1291 unsigned sR; | |
| 1292 unsigned sG; | |
| 1293 unsigned sB; | |
| 1294 unsigned dR; | |
| 1295 unsigned dG; | |
| 1296 unsigned dB; | |
| 1297 RETRIEVE_RGB_PIXEL(src, srcbpp, pixel); | |
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1298 if(sA && pixel != ckey) { |
| 0 | 1299 RGB_FROM_PIXEL(pixel, srcfmt, sR, sG, sB); |
| 1300 DISEMBLE_RGB(dst, dstbpp, dstfmt, pixel, dR, dG, dB); | |
| 1301 ALPHA_BLEND(sR, sG, sB, sA, dR, dG, dB); | |
| 1302 ASSEMBLE_RGBA(dst, dstbpp, dstfmt, dR, dG, dB, dA); | |
| 1303 } | |
| 1304 src += srcbpp; | |
| 1305 dst += dstbpp; | |
| 1306 }, | |
| 1307 width); | |
| 1308 src += srcskip; | |
| 1309 dst += dstskip; | |
| 1310 } | |
| 1311 } | |
| 1312 | |
| 1313 /* General (slow) N->N blending with pixel alpha */ | |
| 1314 static void BlitNtoNPixelAlpha(SDL_BlitInfo *info) | |
| 1315 { | |
| 1316 int width = info->d_width; | |
| 1317 int height = info->d_height; | |
| 1318 Uint8 *src = info->s_pixels; | |
| 1319 int srcskip = info->s_skip; | |
| 1320 Uint8 *dst = info->d_pixels; | |
| 1321 int dstskip = info->d_skip; | |
| 1322 SDL_PixelFormat *srcfmt = info->src; | |
| 1323 SDL_PixelFormat *dstfmt = info->dst; | |
| 1324 | |
| 1325 int srcbpp; | |
| 1326 int dstbpp; | |
| 1327 | |
| 1328 /* Set up some basic variables */ | |
| 1329 srcbpp = srcfmt->BytesPerPixel; | |
| 1330 dstbpp = dstfmt->BytesPerPixel; | |
| 1331 | |
| 1332 /* FIXME: for 8bpp source alpha, this doesn't get opaque values | |
| 1333 quite right. for <8bpp source alpha, it gets them very wrong | |
| 1334 (check all macros!) | |
| 1335 It is unclear whether there is a good general solution that doesn't | |
| 1336 need a branch (or a divide). */ | |
| 1337 while ( height-- ) { | |
| 1338 DUFFS_LOOP4( | |
| 1339 { | |
| 1340 Uint32 pixel; | |
| 1341 unsigned sR; | |
| 1342 unsigned sG; | |
| 1343 unsigned sB; | |
| 1344 unsigned dR; | |
| 1345 unsigned dG; | |
| 1346 unsigned dB; | |
| 1347 unsigned sA; | |
| 1348 unsigned dA; | |
| 1349 DISEMBLE_RGBA(src, srcbpp, srcfmt, pixel, sR, sG, sB, sA); | |
|
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1350 if(sA) { |
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1351 DISEMBLE_RGBA(dst, dstbpp, dstfmt, pixel, dR, dG, dB, dA); |
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1352 ALPHA_BLEND(sR, sG, sB, sA, dR, dG, dB); |
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1353 ASSEMBLE_RGBA(dst, dstbpp, dstfmt, dR, dG, dB, dA); |
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1354 } |
| 0 | 1355 src += srcbpp; |
| 1356 dst += dstbpp; | |
| 1357 }, | |
| 1358 width); | |
| 1359 src += srcskip; | |
| 1360 dst += dstskip; | |
| 1361 } | |
| 1362 } | |
| 1363 | |
| 1364 | |
| 1365 SDL_loblit SDL_CalculateAlphaBlit(SDL_Surface *surface, int blit_index) | |
| 1366 { | |
| 1367 SDL_PixelFormat *sf = surface->format; | |
| 1368 SDL_PixelFormat *df = surface->map->dst->format; | |
| 1369 | |
| 1370 if(sf->Amask == 0) { | |
| 1371 if((surface->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY) { | |
| 1372 if(df->BytesPerPixel == 1) | |
| 1373 return BlitNto1SurfaceAlphaKey; | |
| 1374 else | |
| 1375 return BlitNtoNSurfaceAlphaKey; | |
| 1376 } else { | |
| 1377 /* Per-surface alpha blits */ | |
| 1378 switch(df->BytesPerPixel) { | |
| 1379 case 1: | |
| 1380 return BlitNto1SurfaceAlpha; | |
| 1381 | |
| 1382 case 2: | |
| 1383 if(surface->map->identity) { | |
| 1384 if(df->Gmask == 0x7e0) | |
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1385 { |
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1386 #ifdef MMX_ASMBLIT |
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1387 if(SDL_HasMMX()) |
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1388 return Blit565to565SurfaceAlphaMMX; |
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1389 else |
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1390 #endif |
| 0 | 1391 return Blit565to565SurfaceAlpha; |
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1392 } |
| 0 | 1393 else if(df->Gmask == 0x3e0) |
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1394 { |
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1395 #ifdef MMX_ASMBLIT |
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1396 if(SDL_HasMMX()) |
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1397 return Blit555to555SurfaceAlphaMMX; |
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1398 else |
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1399 #endif |
| 0 | 1400 return Blit555to555SurfaceAlpha; |
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1401 } |
| 0 | 1402 } |
| 1403 return BlitNtoNSurfaceAlpha; | |
| 1404 | |
| 1405 case 4: | |
| 1406 if(sf->Rmask == df->Rmask | |
| 1407 && sf->Gmask == df->Gmask | |
| 1408 && sf->Bmask == df->Bmask | |
| 1409 && (sf->Rmask | sf->Gmask | sf->Bmask) == 0xffffff | |
| 1410 && sf->BytesPerPixel == 4) | |
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1411 { |
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1412 #ifdef MMX_ASMBLIT |
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1413 if(SDL_HasMMX()) |
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1414 return BlitRGBtoRGBSurfaceAlphaMMX; |
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1415 else |
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1416 #endif |
| 0 | 1417 return BlitRGBtoRGBSurfaceAlpha; |
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1418 } |
| 0 | 1419 else |
| 1420 return BlitNtoNSurfaceAlpha; | |
| 1421 | |
| 1422 case 3: | |
| 1423 default: | |
| 1424 return BlitNtoNSurfaceAlpha; | |
| 1425 } | |
| 1426 } | |
| 1427 } else { | |
| 1428 /* Per-pixel alpha blits */ | |
| 1429 switch(df->BytesPerPixel) { | |
| 1430 case 1: | |
| 1431 return BlitNto1PixelAlpha; | |
| 1432 | |
| 1433 case 2: | |
| 1434 if(sf->BytesPerPixel == 4 && sf->Amask == 0xff000000 | |
| 1435 && sf->Gmask == 0xff00 | |
| 1436 && ((sf->Rmask == 0xff && df->Rmask == 0x1f) | |
| 1437 || (sf->Bmask == 0xff && df->Bmask == 0x1f))) { | |
| 1438 if(df->Gmask == 0x7e0) | |
| 1439 return BlitARGBto565PixelAlpha; | |
| 1440 else if(df->Gmask == 0x3e0) | |
| 1441 return BlitARGBto555PixelAlpha; | |
| 1442 } | |
| 1443 return BlitNtoNPixelAlpha; | |
| 1444 | |
| 1445 case 4: | |
| 1446 if(sf->Amask == 0xff000000 | |
| 1447 && sf->Rmask == df->Rmask | |
| 1448 && sf->Gmask == df->Gmask | |
| 1449 && sf->Bmask == df->Bmask | |
| 1450 && sf->BytesPerPixel == 4) | |
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1451 { |
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1452 #ifdef MMX_ASMBLIT |
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1453 if(SDL_Has3DNow()) |
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1454 return BlitRGBtoRGBPixelAlphaMMX3DNOW; |
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1455 else |
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1456 if(SDL_HasMMX()) |
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1457 return BlitRGBtoRGBPixelAlphaMMX; |
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1458 else |
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1459 #endif |
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1460 return BlitRGBtoRGBPixelAlpha; |
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1461 } |
| 0 | 1462 return BlitNtoNPixelAlpha; |
| 1463 | |
| 1464 case 3: | |
| 1465 default: | |
| 1466 return BlitNtoNPixelAlpha; | |
| 1467 } | |
| 1468 } | |
| 1469 } | |
| 1470 |