Mercurial > sdl-ios-xcode
annotate src/video/SDL_blit_A.c @ 759:26ac9609211f
From: Thomas Jarosch
To: Ryan C. Gordon
Subject: SDL: DirectFB videodriver segfault
Date: Sun, 21 Dec 2003 20:40:14 +0100
Hi Ryan,
attached is a patch to fix a segfault in DirectFB_VideoQuit.
When SetVideoMode never gets called (f.e. wrong command line arguments
for "testsprite"), this->screen->hwdata is NULL.
Cheers,
Thomas
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Mon, 22 Dec 2003 01:21:20 +0000 |
| parents | 22dbf364c017 |
| children | b8d311d90021 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 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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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(__GNUC__) && defined(USE_ASMBLIT) |
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35 /* Function to check the CPU flags */ |
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36 #include "SDL_cpuinfo.h" |
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37 #include "mmx.h" |
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38 #endif |
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39 |
| 0 | 40 /* Functions to perform alpha blended blitting */ |
| 41 | |
| 42 /* N->1 blending with per-surface alpha */ | |
| 43 static void BlitNto1SurfaceAlpha(SDL_BlitInfo *info) | |
| 44 { | |
| 45 int width = info->d_width; | |
| 46 int height = info->d_height; | |
| 47 Uint8 *src = info->s_pixels; | |
| 48 int srcskip = info->s_skip; | |
| 49 Uint8 *dst = info->d_pixels; | |
| 50 int dstskip = info->d_skip; | |
| 51 Uint8 *palmap = info->table; | |
| 52 SDL_PixelFormat *srcfmt = info->src; | |
| 53 SDL_PixelFormat *dstfmt = info->dst; | |
| 54 int srcbpp = srcfmt->BytesPerPixel; | |
| 55 | |
| 56 const unsigned A = srcfmt->alpha; | |
| 57 | |
| 58 while ( height-- ) { | |
| 59 DUFFS_LOOP4( | |
| 60 { | |
| 61 Uint32 pixel; | |
| 62 unsigned sR; | |
| 63 unsigned sG; | |
| 64 unsigned sB; | |
| 65 unsigned dR; | |
| 66 unsigned dG; | |
| 67 unsigned dB; | |
| 68 DISEMBLE_RGB(src, srcbpp, srcfmt, pixel, sR, sG, sB); | |
| 69 dR = dstfmt->palette->colors[*dst].r; | |
| 70 dG = dstfmt->palette->colors[*dst].g; | |
| 71 dB = dstfmt->palette->colors[*dst].b; | |
| 72 ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB); | |
| 73 dR &= 0xff; | |
| 74 dG &= 0xff; | |
| 75 dB &= 0xff; | |
| 76 /* Pack RGB into 8bit pixel */ | |
| 77 if ( palmap == NULL ) { | |
| 78 *dst =((dR>>5)<<(3+2))| | |
| 79 ((dG>>5)<<(2))| | |
| 80 ((dB>>6)<<(0)); | |
| 81 } else { | |
| 82 *dst = palmap[((dR>>5)<<(3+2))| | |
| 83 ((dG>>5)<<(2)) | | |
| 84 ((dB>>6)<<(0))]; | |
| 85 } | |
| 86 dst++; | |
| 87 src += srcbpp; | |
| 88 }, | |
| 89 width); | |
| 90 src += srcskip; | |
| 91 dst += dstskip; | |
| 92 } | |
| 93 } | |
| 94 | |
| 95 /* N->1 blending with pixel alpha */ | |
| 96 static void BlitNto1PixelAlpha(SDL_BlitInfo *info) | |
| 97 { | |
| 98 int width = info->d_width; | |
| 99 int height = info->d_height; | |
| 100 Uint8 *src = info->s_pixels; | |
| 101 int srcskip = info->s_skip; | |
| 102 Uint8 *dst = info->d_pixels; | |
| 103 int dstskip = info->d_skip; | |
| 104 Uint8 *palmap = info->table; | |
| 105 SDL_PixelFormat *srcfmt = info->src; | |
| 106 SDL_PixelFormat *dstfmt = info->dst; | |
| 107 int srcbpp = srcfmt->BytesPerPixel; | |
| 108 | |
| 109 /* FIXME: fix alpha bit field expansion here too? */ | |
| 110 while ( height-- ) { | |
| 111 DUFFS_LOOP4( | |
| 112 { | |
| 113 Uint32 pixel; | |
| 114 unsigned sR; | |
| 115 unsigned sG; | |
| 116 unsigned sB; | |
| 117 unsigned sA; | |
| 118 unsigned dR; | |
| 119 unsigned dG; | |
| 120 unsigned dB; | |
| 121 DISEMBLE_RGBA(src,srcbpp,srcfmt,pixel,sR,sG,sB,sA); | |
| 122 dR = dstfmt->palette->colors[*dst].r; | |
| 123 dG = dstfmt->palette->colors[*dst].g; | |
| 124 dB = dstfmt->palette->colors[*dst].b; | |
| 125 ALPHA_BLEND(sR, sG, sB, sA, dR, dG, dB); | |
| 126 dR &= 0xff; | |
| 127 dG &= 0xff; | |
| 128 dB &= 0xff; | |
| 129 /* Pack RGB into 8bit pixel */ | |
| 130 if ( palmap == NULL ) { | |
| 131 *dst =((dR>>5)<<(3+2))| | |
| 132 ((dG>>5)<<(2))| | |
| 133 ((dB>>6)<<(0)); | |
| 134 } else { | |
| 135 *dst = palmap[((dR>>5)<<(3+2))| | |
| 136 ((dG>>5)<<(2)) | | |
| 137 ((dB>>6)<<(0)) ]; | |
| 138 } | |
| 139 dst++; | |
| 140 src += srcbpp; | |
| 141 }, | |
| 142 width); | |
| 143 src += srcskip; | |
| 144 dst += dstskip; | |
| 145 } | |
| 146 } | |
| 147 | |
| 148 /* colorkeyed N->1 blending with per-surface alpha */ | |
| 149 static void BlitNto1SurfaceAlphaKey(SDL_BlitInfo *info) | |
| 150 { | |
| 151 int width = info->d_width; | |
| 152 int height = info->d_height; | |
| 153 Uint8 *src = info->s_pixels; | |
| 154 int srcskip = info->s_skip; | |
| 155 Uint8 *dst = info->d_pixels; | |
| 156 int dstskip = info->d_skip; | |
| 157 Uint8 *palmap = info->table; | |
| 158 SDL_PixelFormat *srcfmt = info->src; | |
| 159 SDL_PixelFormat *dstfmt = info->dst; | |
| 160 int srcbpp = srcfmt->BytesPerPixel; | |
| 161 Uint32 ckey = srcfmt->colorkey; | |
| 162 | |
| 163 const int A = srcfmt->alpha; | |
| 164 | |
| 165 while ( height-- ) { | |
| 166 DUFFS_LOOP( | |
| 167 { | |
| 168 Uint32 pixel; | |
| 169 unsigned sR; | |
| 170 unsigned sG; | |
| 171 unsigned sB; | |
| 172 unsigned dR; | |
| 173 unsigned dG; | |
| 174 unsigned dB; | |
| 175 DISEMBLE_RGB(src, srcbpp, srcfmt, pixel, sR, sG, sB); | |
| 176 if ( pixel != ckey ) { | |
| 177 dR = dstfmt->palette->colors[*dst].r; | |
| 178 dG = dstfmt->palette->colors[*dst].g; | |
| 179 dB = dstfmt->palette->colors[*dst].b; | |
| 180 ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB); | |
| 181 dR &= 0xff; | |
| 182 dG &= 0xff; | |
| 183 dB &= 0xff; | |
| 184 /* Pack RGB into 8bit pixel */ | |
| 185 if ( palmap == NULL ) { | |
| 186 *dst =((dR>>5)<<(3+2))| | |
| 187 ((dG>>5)<<(2)) | | |
| 188 ((dB>>6)<<(0)); | |
| 189 } else { | |
| 190 *dst = palmap[((dR>>5)<<(3+2))| | |
| 191 ((dG>>5)<<(2)) | | |
| 192 ((dB>>6)<<(0)) ]; | |
| 193 } | |
| 194 } | |
| 195 dst++; | |
| 196 src += srcbpp; | |
| 197 }, | |
| 198 width); | |
| 199 src += srcskip; | |
| 200 dst += dstskip; | |
| 201 } | |
| 202 } | |
| 203 | |
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204 #if defined(i386) && defined(__GNUC__) && defined(USE_ASMBLIT) |
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205 /* fast RGB888->(A)RGB888 blending with surface alpha=128 special case */ |
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206 static void BlitRGBtoRGBSurfaceAlpha128MMX(SDL_BlitInfo *info) |
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207 { |
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208 int width = info->d_width; |
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209 int height = info->d_height; |
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210 Uint32 *srcp = (Uint32 *)info->s_pixels; |
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211 int srcskip = info->s_skip >> 2; |
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212 Uint32 *dstp = (Uint32 *)info->d_pixels; |
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213 int dstskip = info->d_skip >> 2; |
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214 Uint8 load[8]; |
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215 |
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216 *(Uint64 *)load = 0x00fefefe00fefefeULL;/* alpha128 mask */ |
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217 movq_m2r(*load, mm4); /* alpha128 mask -> mm4 */ |
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218 *(Uint64 *)load = 0x0001010100010101ULL;/* !alpha128 mask */ |
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219 movq_m2r(*load, mm3); /* !alpha128 mask -> mm3 */ |
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220 *(Uint64 *)load = 0xFF000000FF000000ULL;/* dst alpha mask */ |
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221 movq_m2r(*load, mm7); /* dst alpha mask -> mm7 */ |
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222 while(height--) { |
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223 DUFFS_LOOP_DOUBLE2( |
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224 { |
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225 Uint32 s = *srcp++; |
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226 Uint32 d = *dstp; |
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227 *dstp++ = ((((s & 0x00fefefe) + (d & 0x00fefefe)) >> 1) |
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228 + (s & d & 0x00010101)) | 0xff000000; |
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229 },{ |
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230 movq_m2r((*dstp), mm2);/* 2 x dst -> mm2(ARGBARGB) */ |
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231 movq_r2r(mm2, mm6); /* 2 x dst -> mm6(ARGBARGB) */ |
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232 |
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233 movq_m2r((*srcp), mm1);/* 2 x src -> mm1(ARGBARGB) */ |
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234 movq_r2r(mm1, mm5); /* 2 x src -> mm5(ARGBARGB) */ |
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235 |
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236 pand_r2r(mm4, mm6); /* dst & mask -> mm6 */ |
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237 pand_r2r(mm4, mm5); /* src & mask -> mm5 */ |
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238 paddd_r2r(mm6, mm5); /* mm6 + mm5 -> mm5 */ |
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239 psrld_i2r(1, mm5); /* mm5 >> 1 -> mm5 */ |
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240 |
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241 pand_r2r(mm1, mm2); /* src & dst -> mm2 */ |
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242 pand_r2r(mm3, mm2); /* mm2 & !mask -> mm2 */ |
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243 paddd_r2r(mm5, mm2); /* mm5 + mm2 -> mm2 */ |
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244 por_r2r(mm7, mm2); /* mm7(full alpha) | mm2 -> mm2 */ |
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245 movq_r2m(mm2, (*dstp));/* mm2 -> 2 x dst pixels */ |
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246 dstp += 2; |
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247 srcp += 2; |
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248 }, width); |
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249 srcp += srcskip; |
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250 dstp += dstskip; |
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251 } |
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252 emms(); |
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253 } |
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254 |
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255 /* fast RGB888->(A)RGB888 blending with surface alpha */ |
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256 static void BlitRGBtoRGBSurfaceAlphaMMX(SDL_BlitInfo *info) |
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257 { |
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258 unsigned alpha = info->src->alpha; |
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259 if(alpha == 128) { |
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260 BlitRGBtoRGBSurfaceAlpha128MMX(info); |
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261 } else { |
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262 int width = info->d_width; |
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263 int height = info->d_height; |
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264 Uint32 *srcp = (Uint32 *)info->s_pixels; |
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265 int srcskip = info->s_skip >> 2; |
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266 Uint32 *dstp = (Uint32 *)info->d_pixels; |
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267 int dstskip = info->d_skip >> 2; |
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268 Uint8 load[8] = {alpha, alpha, alpha, alpha, |
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269 alpha, alpha, alpha, alpha}; |
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270 |
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271 movq_m2r(*load, mm4); /* alpha -> mm4 */ |
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272 *(Uint64 *)load = 0x00FF00FF00FF00FFULL; |
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273 movq_m2r(*load, mm3); /* mask -> mm3 */ |
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274 pand_r2r(mm3, mm4); /* mm4 & mask -> 0A0A0A0A -> mm4 */ |
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275 *(Uint64 *)load = 0xFF000000FF000000ULL;/* dst alpha mask */ |
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276 movq_m2r(*load, mm7); /* dst alpha mask -> mm7 */ |
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277 |
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278 while(height--) { |
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279 DUFFS_LOOP_DOUBLE2({ |
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280 /* One Pixel Blend */ |
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281 movd_m2r((*srcp), mm1);/* src(ARGB) -> mm1 (0000ARGB)*/ |
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282 punpcklbw_r2r(mm1, mm1); /* AARRGGBB -> mm1 */ |
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283 pand_r2r(mm3, mm1); /* 0A0R0G0B -> mm1 */ |
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284 |
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285 movd_m2r((*dstp), mm2);/* dst(ARGB) -> mm2 (0000ARGB)*/ |
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286 movq_r2r(mm2, mm6);/* dst(ARGB) -> mm6 (0000ARGB)*/ |
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287 punpcklbw_r2r(mm2, mm2); /* AARRGGBB -> mm2 */ |
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288 pand_r2r(mm3, mm2); /* 0A0R0G0B -> mm2 */ |
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289 |
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290 psubw_r2r(mm2, mm1);/* src - dst -> mm1 */ |
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291 pmullw_r2r(mm4, mm1); /* mm1 * alpha -> mm1 */ |
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292 psrlw_i2r(8, mm1); /* mm1 >> 8 -> mm1 */ |
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293 paddw_r2r(mm1, mm2); /* mm1 + mm2(dst) -> mm2 */ |
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294 pand_r2r(mm3, mm2); /* 0A0R0G0B -> mm2 */ |
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295 packuswb_r2r(mm2, mm2); /* ARGBARGB -> mm2 */ |
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296 por_r2r(mm7, mm2); /* mm7(full alpha) | mm2 -> mm2 */ |
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297 movd_r2m(mm2, *dstp);/* mm2 -> pixel */ |
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298 ++srcp; |
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299 ++dstp; |
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300 },{ |
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301 /* Two Pixels Blend */ |
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302 movq_m2r((*srcp), mm0);/* 2 x src -> mm0(ARGBARGB)*/ |
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303 movq_r2r(mm0, mm1); /* 2 x src -> mm1(ARGBARGB) */ |
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304 punpcklbw_r2r(mm0, mm0); /* low - AARRGGBB -> mm0 */ |
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305 pand_r2r(mm3, mm0); /* 0A0R0G0B -> mm0(src1) */ |
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306 punpckhbw_r2r(mm1, mm1); /* high - AARRGGBB -> mm1 */ |
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307 pand_r2r(mm3, mm1); /* 0A0R0G0B -> mm1(src2) */ |
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308 |
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309 movq_m2r((*dstp), mm2);/* 2 x dst -> mm2(ARGBARGB) */ |
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310 movq_r2r(mm2, mm5); /* 2 x dst -> mm5(ARGBARGB) */ |
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311 movq_r2r(mm2, mm6); /* 2 x dst -> mm6(ARGBARGB) */ |
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312 punpcklbw_r2r(mm2, mm2); /* low - AARRGGBB -> mm2 */ |
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313 punpckhbw_r2r(mm6, mm6); /* high - AARRGGBB -> mm6 */ |
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314 pand_r2r(mm3, mm2); /* 0A0R0G0B -> mm2(dst1) */ |
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315 |
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316 psubw_r2r(mm2, mm0);/* src1 - dst1 -> mm0 */ |
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317 pmullw_r2r(mm4, mm0); /* mm0 * alpha -> mm0 */ |
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318 pand_r2r(mm3, mm6); /* 0A0R0G0B -> mm6(dst2) */ |
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319 psrlw_i2r(8, mm0); /* mm0 >> 8 -> mm1 */ |
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320 psubw_r2r(mm6, mm1);/* src2 - dst2 -> mm1 */ |
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321 pmullw_r2r(mm4, mm1); /* mm1 * alpha -> mm1 */ |
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322 paddw_r2r(mm0, mm2); /* mm0 + mm2(dst1) -> mm2 */ |
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323 psrlw_i2r(8, mm1); /* mm1 >> 8 -> mm0 */ |
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324 pand_r2r(mm3, mm2); /* 0A0R0G0B -> mm2 */ |
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325 paddw_r2r(mm1, mm6); /* mm1 + mm6(dst2) -> mm6 */ |
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326 pand_r2r(mm3, mm6); /* 0A0R0G0B -> mm6 */ |
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327 packuswb_r2r(mm2, mm2); /* ARGBARGB -> mm2 */ |
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328 packuswb_r2r(mm6, mm6); /* ARGBARGB -> mm6 */ |
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329 psrlq_i2r(32, mm2); /* mm2 >> 32 -> mm2 */ |
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330 psllq_i2r(32, mm6); /* mm6 << 32 -> mm6 */ |
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331 por_r2r(mm6, mm2); /* mm6 | mm2 -> mm2 */ |
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332 por_r2r(mm7, mm2); /* mm7(full alpha) | mm2 -> mm2 */ |
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333 movq_r2m(mm2, *dstp);/* mm2 -> 2 x pixel */ |
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334 srcp += 2; |
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335 dstp += 2; |
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336 }, width); |
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337 srcp += srcskip; |
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338 dstp += dstskip; |
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339 } |
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340 emms(); |
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341 } |
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342 } |
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343 |
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344 /* fast ARGB888->(A)RGB888 blending with pixel alpha */ |
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345 static void BlitRGBtoRGBPixelAlphaMMX(SDL_BlitInfo *info) |
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346 { |
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347 int width = info->d_width; |
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348 int height = info->d_height; |
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349 Uint32 *srcp = (Uint32 *)info->s_pixels; |
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350 int srcskip = info->s_skip >> 2; |
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351 Uint32 *dstp = (Uint32 *)info->d_pixels; |
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352 int dstskip = info->d_skip >> 2; |
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353 Uint32 alpha = 0; |
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354 Uint8 load[8]; |
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355 |
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356 *(Uint64 *)load = 0x00FF00FF00FF00FFULL; |
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357 movq_m2r(*load, mm3); /* mask -> mm2 */ |
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358 *(Uint64 *)load = 0x00FF000000000000ULL; |
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359 movq_m2r(*load, mm7); /* dst alpha mask -> mm2 */ |
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360 *(Uint64 *)load = 0x00FFFFFF00FFFFFFULL; |
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361 movq_m2r(*load, mm0); /* alpha 255 mask -> mm0 */ |
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362 *(Uint64 *)load = 0xFF000000FF000000ULL; |
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363 movq_m2r(*load, mm6); /* alpha 255 !mask -> mm6 */ |
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364 while(height--) { |
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365 DUFFS_LOOP4({ |
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366 alpha = *srcp; |
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367 alpha >>= 24; |
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368 /* FIXME: Here we special-case opaque alpha since the |
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369 compositioning used (>>8 instead of /255) doesn't handle |
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370 it correctly. Also special-case alpha=0 for speed? |
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371 Benchmark this! */ |
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372 if(alpha) { |
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373 if(alpha == SDL_ALPHA_OPAQUE) { |
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374 movd_m2r((*srcp), mm1);/* src(ARGB) -> mm1 (0000ARGB)*/ |
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375 movd_m2r((*dstp), mm2);/* dst(ARGB) -> mm2 (0000ARGB)*/ |
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376 pand_r2r(mm0, mm1); |
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377 pand_r2r(mm6, mm2); |
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378 por_r2r(mm1, mm2); |
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379 movd_r2m(mm2, (*dstp)); |
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380 } else { |
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381 movd_m2r((*srcp), mm1);/* src(ARGB) -> mm1 (0000ARGB)*/ |
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382 punpcklbw_r2r(mm1, mm1); /* AARRGGBB -> mm1 */ |
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383 pand_r2r(mm3, mm1); /* 0A0R0G0B -> mm1 */ |
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384 |
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385 movd_m2r((*dstp), mm2);/* dst(ARGB) -> mm2 (0000ARGB)*/ |
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386 punpcklbw_r2r(mm2, mm2); /* AARRGGBB -> mm2 */ |
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387 pand_r2r(mm3, mm2); /* 0A0R0G0B -> mm2 */ |
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388 |
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389 movq_r2r(mm2, mm5);/* mm2(0A0R0G0B) -> mm5 */ |
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390 pand_r2r(mm7, mm5); /* mm5 & dst alpha mask -> mm5(0A000000) */ |
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391 psrlq_i2r(24, mm5); /* mm5 >> 24 -> mm5 (0000A000)*/ |
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392 |
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393 movq_r2r(mm1, mm4);/* mm1(0A0R0G0B) -> mm4 */ |
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394 psrlq_i2r(48, mm4); /* mm4 >> 48 -> mm4(0000000A) */ |
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395 punpcklwd_r2r(mm4, mm4); /* 00000A0A -> mm4 */ |
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396 punpcklwd_r2r(mm4, mm4); /* 0A0A0A0A -> mm4 */ |
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397 |
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398 /* blend */ |
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399 psubw_r2r(mm2, mm1);/* src - dst -> mm1 */ |
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400 pmullw_r2r(mm4, mm1); /* mm1 * alpha -> mm1 */ |
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401 psrlw_i2r(8, mm1); /* mm1 >> 8 -> mm1 */ |
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402 paddw_r2r(mm1, mm2); /* mm1 + mm2(dst) -> mm2 */ |
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403 pand_r2r(mm3, mm2); /* 0A0R0G0B -> mm2 */ |
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404 packuswb_r2r(mm2, mm2); /* ARGBARGB -> mm2 */ |
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405 pand_r2r(mm0, mm2); /* 0RGB0RGB -> mm2 */ |
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406 por_r2r(mm5, mm2); /* dst alpha | mm2 -> mm2 */ |
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407 movd_r2m(mm2, *dstp);/* mm2 -> dst */ |
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408 } |
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409 } |
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410 ++srcp; |
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411 ++dstp; |
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412 }, width); |
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413 srcp += srcskip; |
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414 dstp += dstskip; |
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415 } |
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416 emms(); |
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417 } |
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418 #endif |
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419 |
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420 /* fast RGB888->(A)RGB888 blending with surface alpha=128 special case */ |
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421 static void BlitRGBtoRGBSurfaceAlpha128(SDL_BlitInfo *info) |
| 0 | 422 { |
| 423 int width = info->d_width; | |
| 424 int height = info->d_height; | |
| 425 Uint32 *srcp = (Uint32 *)info->s_pixels; | |
| 426 int srcskip = info->s_skip >> 2; | |
| 427 Uint32 *dstp = (Uint32 *)info->d_pixels; | |
| 428 int dstskip = info->d_skip >> 2; | |
| 429 | |
| 430 while(height--) { | |
| 431 DUFFS_LOOP4({ | |
|
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432 Uint32 s = *srcp++; |
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433 Uint32 d = *dstp; |
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434 *dstp++ = ((((s & 0x00fefefe) + (d & 0x00fefefe)) >> 1) |
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435 + (s & d & 0x00010101)) | 0xff000000; |
| 0 | 436 }, width); |
| 437 srcp += srcskip; | |
| 438 dstp += dstskip; | |
| 439 } | |
| 440 } | |
| 441 | |
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442 /* fast RGB888->(A)RGB888 blending with surface alpha */ |
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443 static void BlitRGBtoRGBSurfaceAlpha(SDL_BlitInfo *info) |
|
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444 { |
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445 unsigned alpha = info->src->alpha; |
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446 if(alpha == 128) { |
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447 BlitRGBtoRGBSurfaceAlpha128(info); |
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448 } else { |
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449 int width = info->d_width; |
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450 int height = info->d_height; |
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451 Uint32 *srcp = (Uint32 *)info->s_pixels; |
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452 int srcskip = info->s_skip >> 2; |
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453 Uint32 *dstp = (Uint32 *)info->d_pixels; |
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454 int dstskip = info->d_skip >> 2; |
|
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455 Uint32 s; |
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456 Uint32 d; |
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457 Uint32 s1; |
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458 Uint32 d1; |
|
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459 |
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460 while(height--) { |
|
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461 DUFFS_LOOP_DOUBLE2({ |
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462 /* One Pixel Blend */ |
|
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463 s = *srcp; |
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464 d = *dstp; |
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465 s1 = s & 0xff00ff; |
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466 d1 = d & 0xff00ff; |
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467 d1 = (d1 + ((s1 - d1) * alpha >> 8)) |
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468 & 0xff00ff; |
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469 s &= 0xff00; |
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470 d &= 0xff00; |
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471 d = (d + ((s - d) * alpha >> 8)) & 0xff00; |
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472 *dstp = d1 | d | 0xff000000; |
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473 ++srcp; |
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474 ++dstp; |
|
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475 },{ |
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476 /* Two Pixels Blend */ |
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477 s = *srcp; |
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478 d = *dstp; |
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479 s1 = s & 0xff00ff; |
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480 d1 = d & 0xff00ff; |
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481 d1 += (s1 - d1) * alpha >> 8; |
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482 d1 &= 0xff00ff; |
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483 |
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484 s = ((s & 0xff00) >> 8) | |
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485 ((srcp[1] & 0xff00) << 8); |
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486 d = ((d & 0xff00) >> 8) | |
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487 ((dstp[1] & 0xff00) << 8); |
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488 d += (s - d) * alpha >> 8; |
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489 d &= 0x00ff00ff; |
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490 |
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491 *dstp++ = d1 | ((d << 8) & 0xff00) | 0xff000000; |
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492 ++srcp; |
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493 |
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494 s1 = *srcp; |
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495 d1 = *dstp; |
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496 s1 &= 0xff00ff; |
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497 d1 &= 0xff00ff; |
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498 d1 += (s1 - d1) * alpha >> 8; |
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499 d1 &= 0xff00ff; |
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500 |
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501 *dstp = d1 | ((d >> 8) & 0xff00) | 0xff000000; |
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502 ++srcp; |
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503 ++dstp; |
|
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504 }, width); |
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505 srcp += srcskip; |
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506 dstp += dstskip; |
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507 } |
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508 } |
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509 } |
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510 |
| 0 | 511 /* fast ARGB888->(A)RGB888 blending with pixel alpha */ |
| 512 static void BlitRGBtoRGBPixelAlpha(SDL_BlitInfo *info) | |
| 513 { | |
| 514 int width = info->d_width; | |
| 515 int height = info->d_height; | |
| 516 Uint32 *srcp = (Uint32 *)info->s_pixels; | |
| 517 int srcskip = info->s_skip >> 2; | |
| 518 Uint32 *dstp = (Uint32 *)info->d_pixels; | |
| 519 int dstskip = info->d_skip >> 2; | |
| 520 | |
| 521 while(height--) { | |
| 522 DUFFS_LOOP4({ | |
| 523 Uint32 dalpha; | |
| 524 Uint32 d; | |
| 525 Uint32 s1; | |
| 526 Uint32 d1; | |
| 527 Uint32 s = *srcp; | |
| 528 Uint32 alpha = s >> 24; | |
| 529 /* FIXME: Here we special-case opaque alpha since the | |
| 530 compositioning used (>>8 instead of /255) doesn't handle | |
| 531 it correctly. Also special-case alpha=0 for speed? | |
| 532 Benchmark this! */ | |
|
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533 if(alpha) { |
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534 if(alpha == SDL_ALPHA_OPAQUE) { |
| 0 | 535 *dstp = (s & 0x00ffffff) | (*dstp & 0xff000000); |
|
689
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536 } else { |
| 0 | 537 /* |
| 538 * take out the middle component (green), and process | |
| 539 * the other two in parallel. One multiply less. | |
| 540 */ | |
| 541 d = *dstp; | |
| 542 dalpha = d & 0xff000000; | |
| 543 s1 = s & 0xff00ff; | |
| 544 d1 = d & 0xff00ff; | |
| 545 d1 = (d1 + ((s1 - d1) * alpha >> 8)) & 0xff00ff; | |
| 546 s &= 0xff00; | |
| 547 d &= 0xff00; | |
| 548 d = (d + ((s - d) * alpha >> 8)) & 0xff00; | |
| 549 *dstp = d1 | d | dalpha; | |
|
689
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550 } |
| 0 | 551 } |
| 552 ++srcp; | |
| 553 ++dstp; | |
| 554 }, width); | |
| 555 srcp += srcskip; | |
| 556 dstp += dstskip; | |
| 557 } | |
| 558 } | |
| 559 | |
|
689
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560 #if defined(i386) && defined(__GNUC__) && defined(USE_ASMBLIT) |
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561 /* fast (as in MMX with prefetch) ARGB888->(A)RGB888 blending with pixel alpha */ |
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562 inline static void BlitRGBtoRGBPixelAlphaMMX3DNOW(SDL_BlitInfo *info) |
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563 { |
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564 int width = info->d_width; |
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565 int height = info->d_height; |
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566 Uint32 *srcp = (Uint32 *)info->s_pixels; |
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567 int srcskip = info->s_skip >> 2; |
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568 Uint32 *dstp = (Uint32 *)info->d_pixels; |
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569 int dstskip = info->d_skip >> 2; |
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570 |
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571 Uint32 s; |
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572 Uint32 alpha; |
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573 |
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574 __asm__ ( |
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575 /* make mm6 all zeros. */ |
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576 "pxor %%mm6, %%mm6\n" |
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577 |
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578 /* Make a mask to preserve the alpha. */ |
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579 "pcmpeqb %%mm7, %%mm7\n\t" /* mm7(s) = FF FF FF FF | FF FF FF FF */ |
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580 "psrlq $16, %%mm7\n\t" /* mm7(s) = 00 00 FF FF | FF FF FF FF */ |
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581 |
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582 : ); |
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583 |
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584 while(height--) { |
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585 |
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586 DUFFS_LOOP4({ |
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587 |
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588 __asm__ ( |
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589 "prefetch 64(%0)\n" |
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590 "prefetch 64(%1)\n" |
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591 : : "r" (srcp), "r" (dstp) ); |
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592 |
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593 s = *srcp; |
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594 alpha = s >> 24; |
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595 /* FIXME: Here we special-case opaque alpha since the |
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596 compositioning used (>>8 instead of /255) doesn't handle |
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597 it correctly. Also special-case alpha=0 for speed? |
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598 Benchmark this! */ |
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599 |
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600 if(alpha == SDL_ALPHA_OPAQUE) { |
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601 *dstp = (s & 0x00ffffff) | (*dstp & 0xff000000); |
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602 } |
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603 |
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604 else { |
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605 __asm__ ( |
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606 /* load in the source, and dst. */ |
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607 "movd (%0), %%mm0\n" /* mm0(s) = 0 0 0 0 | As Rs Gs Bs */ |
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608 "movd (%1), %%mm1\n" /* mm1(d) = 0 0 0 0 | Ad Rd Gd Bd */ |
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609 |
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610 /* Move the src alpha into mm2 */ |
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611 |
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612 /* if supporting pshufw */ |
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613 /*"pshufw $0x55, %%mm0, %%mm2\n" */ /* mm2 = 0 As 0 As | 0 As 0 As */ |
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614 /*"psrlw $8, %%mm2\n" */ |
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615 |
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616 /* else: */ |
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617 "movq %%mm0, %%mm2\n" |
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618 "psrld $24, %%mm2\n" /* mm2 = 0 0 0 0 | 0 0 0 As */ |
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619 "punpcklwd %%mm2, %%mm2\n" /* mm2 = 0 0 0 0 | 0 As 0 As */ |
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620 "punpckldq %%mm2, %%mm2\n" /* mm2 = 0 As 0 As | 0 As 0 As */ |
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621 |
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622 /* move the colors into words. */ |
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623 "punpcklbw %%mm6, %%mm0\n" /* mm0 = 0 As 0 Rs | 0 Gs 0 Bs */ |
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624 "punpcklbw %%mm6, %%mm1\n" /* mm0 = 0 Ad 0 Rd | 0 Gd 0 Bd */ |
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625 |
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626 /* src - dst */ |
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627 "psubw %%mm1, %%mm0\n" /* mm0 = As-Ad Rs-Rd | Gs-Gd Bs-Bd */ |
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628 |
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629 /* A * (src-dst) */ |
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630 "pmullw %%mm2, %%mm0\n" /* mm0 = As*As-d As*Rs-d | As*Gs-d As*Bs-d */ |
|
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631 "pand %%mm7, %%mm0\n" /* to preserve dest alpha */ |
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632 "psrlw $8, %%mm0\n" /* mm0 = Ac>>8 Rc>>8 | Gc>>8 Bc>>8 */ |
|
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633 "paddb %%mm1, %%mm0\n" /* mm0 = Ac+Ad Rc+Rd | Gc+Gd Bc+Bd */ |
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634 |
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635 "packuswb %%mm0, %%mm0\n" /* mm0 = | Ac Rc Gc Bc */ |
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636 |
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637 "movd %%mm0, (%1)\n" /* result in mm0 */ |
|
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638 |
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639 : : "r" (srcp), "r" (dstp) ); |
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640 |
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641 } |
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642 ++srcp; |
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643 ++dstp; |
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644 }, width); |
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645 srcp += srcskip; |
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646 dstp += dstskip; |
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647 } |
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648 |
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649 __asm__ ( |
|
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650 "emms\n" |
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651 : ); |
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652 } |
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653 #endif |
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654 |
|
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655 /* 16bpp special case for per-surface alpha=50%: blend 2 pixels in parallel */ |
|
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656 |
|
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|
657 /* blend a single 16 bit pixel at 50% */ |
|
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658 #define BLEND16_50(d, s, mask) \ |
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659 ((((s & mask) + (d & mask)) >> 1) + (s & d & (~mask & 0xffff))) |
|
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660 |
|
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|
661 /* blend two 16 bit pixels at 50% */ |
|
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662 #define BLEND2x16_50(d, s, mask) \ |
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663 (((s & (mask | mask << 16)) >> 1) + ((d & (mask | mask << 16)) >> 1) \ |
|
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|
664 + (s & d & (~(mask | mask << 16)))) |
|
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|
665 |
|
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666 static void Blit16to16SurfaceAlpha128(SDL_BlitInfo *info, Uint16 mask) |
| 0 | 667 { |
| 668 int width = info->d_width; | |
| 669 int height = info->d_height; | |
| 670 Uint16 *srcp = (Uint16 *)info->s_pixels; | |
| 671 int srcskip = info->s_skip >> 1; | |
| 672 Uint16 *dstp = (Uint16 *)info->d_pixels; | |
| 673 int dstskip = info->d_skip >> 1; | |
| 674 | |
| 675 while(height--) { | |
|
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676 if(((unsigned long)srcp ^ (unsigned long)dstp) & 2) { |
|
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677 /* |
|
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678 * Source and destination not aligned, pipeline it. |
|
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679 * This is mostly a win for big blits but no loss for |
|
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680 * small ones |
|
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681 */ |
|
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|
682 Uint32 prev_sw; |
|
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683 int w = width; |
|
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|
684 |
|
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|
685 /* handle odd destination */ |
|
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|
686 if((unsigned long)dstp & 2) { |
|
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|
687 Uint16 d = *dstp, s = *srcp; |
|
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688 *dstp = BLEND16_50(d, s, mask); |
|
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|
689 dstp++; |
|
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|
690 srcp++; |
|
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|
691 w--; |
|
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|
692 } |
|
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|
693 srcp++; /* srcp is now 32-bit aligned */ |
|
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|
694 |
|
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|
695 /* bootstrap pipeline with first halfword */ |
|
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696 prev_sw = ((Uint32 *)srcp)[-1]; |
|
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|
697 |
|
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|
698 while(w > 1) { |
|
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|
699 Uint32 sw, dw, s; |
|
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|
700 sw = *(Uint32 *)srcp; |
|
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|
701 dw = *(Uint32 *)dstp; |
|
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|
702 if(SDL_BYTEORDER == SDL_BIG_ENDIAN) |
|
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|
703 s = (prev_sw << 16) + (sw >> 16); |
|
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|
704 else |
|
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|
705 s = (prev_sw >> 16) + (sw << 16); |
|
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|
706 prev_sw = sw; |
|
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|
707 *(Uint32 *)dstp = BLEND2x16_50(dw, s, mask); |
|
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|
708 dstp += 2; |
|
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|
709 srcp += 2; |
|
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|
710 w -= 2; |
|
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|
711 } |
|
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|
712 |
|
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|
713 /* final pixel if any */ |
|
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|
714 if(w) { |
|
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|
715 Uint16 d = *dstp, s; |
|
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|
716 if(SDL_BYTEORDER == SDL_BIG_ENDIAN) |
|
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|
717 s = prev_sw; |
|
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|
718 else |
|
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|
719 s = prev_sw >> 16; |
|
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|
720 *dstp = BLEND16_50(d, s, mask); |
|
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|
721 srcp++; |
|
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|
722 dstp++; |
|
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|
723 } |
|
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|
724 srcp += srcskip - 1; |
|
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|
725 dstp += dstskip; |
|
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|
726 } else { |
|
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|
727 /* source and destination are aligned */ |
|
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|
728 int w = width; |
|
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|
729 |
|
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|
730 /* first odd pixel? */ |
|
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|
731 if((unsigned long)srcp & 2) { |
|
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|
732 Uint16 d = *dstp, s = *srcp; |
|
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|
733 *dstp = BLEND16_50(d, s, mask); |
|
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|
734 srcp++; |
|
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|
735 dstp++; |
|
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|
736 w--; |
|
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|
737 } |
|
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|
738 /* srcp and dstp are now 32-bit aligned */ |
|
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|
739 |
|
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|
740 while(w > 1) { |
|
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|
741 Uint32 sw = *(Uint32 *)srcp; |
|
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|
742 Uint32 dw = *(Uint32 *)dstp; |
|
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|
743 *(Uint32 *)dstp = BLEND2x16_50(dw, sw, mask); |
|
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|
744 srcp += 2; |
|
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|
745 dstp += 2; |
|
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|
746 w -= 2; |
|
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|
747 } |
|
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|
748 |
|
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|
749 /* last odd pixel? */ |
|
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|
750 if(w) { |
|
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751 Uint16 d = *dstp, s = *srcp; |
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|
752 *dstp = BLEND16_50(d, s, mask); |
|
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|
753 srcp++; |
|
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|
754 dstp++; |
|
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|
755 } |
|
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|
756 srcp += srcskip; |
|
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|
757 dstp += dstskip; |
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758 } |
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759 } |
|
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|
760 } |
|
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761 |
|
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762 #if defined(i386) && defined(__GNUC__) && defined(USE_ASMBLIT) |
|
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763 /* fast RGB565->RGB565 blending with surface alpha */ |
|
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764 static void Blit565to565SurfaceAlphaMMX(SDL_BlitInfo *info) |
|
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765 { |
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766 unsigned alpha = info->src->alpha; /* downscale alpha to 5 bits */ |
|
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767 if(alpha == 128) { |
|
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768 Blit16to16SurfaceAlpha128(info, 0xf7de); |
|
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769 } else { |
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770 int width = info->d_width; |
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771 int height = info->d_height; |
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772 Uint16 *srcp = (Uint16 *)info->s_pixels; |
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773 int srcskip = info->s_skip >> 1; |
|
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774 Uint16 *dstp = (Uint16 *)info->d_pixels; |
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775 int dstskip = info->d_skip >> 1; |
|
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776 Uint32 s, d; |
|
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777 Uint8 load[8]; |
|
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778 |
|
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779 alpha &= ~(1+2+4); /* cut alpha to get the exact same behaviour */ |
|
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780 *(Uint64 *)load = alpha; |
|
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781 alpha >>= 3; /* downscale alpha to 5 bits */ |
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782 |
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783 movq_m2r(*load, mm0); /* alpha(0000000A) -> mm0 */ |
|
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784 punpcklwd_r2r(mm0, mm0); /* 00000A0A -> mm0 */ |
|
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785 punpcklwd_r2r(mm0, mm0); /* 0A0A0A0A -> mm0 */ |
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786 |
|
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787 /* Setup the 565 color channel masks */ |
|
720
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|
788 *(Uint64 *)load = 0xF800F800F800F800ULL; |
|
689
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789 movq_m2r(*load, mm1); /* MASKRED -> mm1 */ |
|
720
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|
790 *(Uint64 *)load = 0x07E007E007E007E0ULL; |
|
689
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791 movq_m2r(*load, mm4); /* MASKGREEN -> mm4 */ |
|
720
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|
792 *(Uint64 *)load = 0x001F001F001F001FULL; |
|
689
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793 movq_m2r(*load, mm7); /* MASKBLUE -> mm7 */ |
|
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794 while(height--) { |
|
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795 DUFFS_LOOP_QUATRO2( |
|
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796 { |
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797 s = *srcp++; |
|
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798 d = *dstp; |
|
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799 /* |
|
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800 * shift out the middle component (green) to |
|
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801 * the high 16 bits, and process all three RGB |
|
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|
802 * components at the same time. |
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803 */ |
|
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804 s = (s | s << 16) & 0x07e0f81f; |
|
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805 d = (d | d << 16) & 0x07e0f81f; |
|
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806 d += (s - d) * alpha >> 5; |
|
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807 d &= 0x07e0f81f; |
|
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808 *dstp++ = d | d >> 16; |
|
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809 },{ |
|
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810 s = *srcp++; |
|
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811 d = *dstp; |
|
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812 /* |
|
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813 * shift out the middle component (green) to |
|
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814 * the high 16 bits, and process all three RGB |
|
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815 * components at the same time. |
|
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|
816 */ |
|
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|
817 s = (s | s << 16) & 0x07e0f81f; |
|
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818 d = (d | d << 16) & 0x07e0f81f; |
|
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819 d += (s - d) * alpha >> 5; |
|
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820 d &= 0x07e0f81f; |
|
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821 *dstp++ = d | d >> 16; |
|
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822 s = *srcp++; |
|
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823 d = *dstp; |
|
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824 /* |
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825 * shift out the middle component (green) to |
|
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826 * the high 16 bits, and process all three RGB |
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827 * components at the same time. |
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828 */ |
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829 s = (s | s << 16) & 0x07e0f81f; |
|
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830 d = (d | d << 16) & 0x07e0f81f; |
|
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|
831 d += (s - d) * alpha >> 5; |
|
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|
832 d &= 0x07e0f81f; |
|
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|
833 *dstp++ = d | d >> 16; |
|
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834 },{ |
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|
835 movq_m2r((*dstp), mm3);/* 4 dst pixels -> mm3 */ |
|
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836 movq_m2r((*srcp), mm2);/* 4 src pixels -> mm2 */ |
|
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837 |
|
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838 /* RED */ |
|
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839 movq_r2r(mm2, mm5); /* src -> mm5 */ |
|
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840 pand_r2r(mm1 , mm5); /* src & MASKRED -> mm5 */ |
|
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841 psrlq_i2r(11, mm5); /* mm5 >> 11 -> mm5 [000r 000r 000r 000r] */ |
|
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842 |
|
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843 movq_r2r(mm3, mm6); /* dst -> mm6 */ |
|
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844 pand_r2r(mm1 , mm6); /* dst & MASKRED -> mm6 */ |
|
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845 psrlq_i2r(11, mm6); /* mm6 >> 11 -> mm6 [000r 000r 000r 000r] */ |
|
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846 |
|
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|
847 /* blend */ |
|
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848 psubw_r2r(mm6, mm5);/* src - dst -> mm5 */ |
|
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849 pmullw_r2r(mm0, mm5); /* mm5 * alpha -> mm5 */ |
|
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850 psrlw_i2r(8, mm5); /* mm5 >> 8 -> mm5 */ |
|
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851 paddw_r2r(mm5, mm6); /* mm5 + mm6(dst) -> mm6 */ |
|
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852 psllq_i2r(11, mm6); /* mm6 << 11 -> mm6 */ |
|
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853 pand_r2r(mm1, mm6); /* mm6 & MASKRED -> mm6 */ |
|
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854 |
|
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|
855 movq_r2r(mm4, mm5); /* MASKGREEN -> mm5 */ |
|
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856 por_r2r(mm7, mm5); /* MASKBLUE | mm5 -> mm5 */ |
|
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857 pand_r2r(mm5, mm3); /* mm3 & mm5(!MASKRED) -> mm3 */ |
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858 por_r2r(mm6, mm3); /* save new reds in dsts */ |
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859 |
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860 /* green */ |
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861 movq_r2r(mm2, mm5); /* src -> mm5 */ |
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862 pand_r2r(mm4 , mm5); /* src & MASKGREEN -> mm5 */ |
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863 psrlq_i2r(5, mm5); /* mm5 >> 5 -> mm5 [000g 000g 000g 000g] */ |
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864 |
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865 movq_r2r(mm3, mm6); /* dst -> mm6 */ |
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866 pand_r2r(mm4 , mm6); /* dst & MASKGREEN -> mm6 */ |
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867 psrlq_i2r(5, mm6); /* mm6 >> 5 -> mm6 [000g 000g 000g 000g] */ |
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868 |
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869 /* blend */ |
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870 psubw_r2r(mm6, mm5);/* src - dst -> mm5 */ |
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871 pmullw_r2r(mm0, mm5); /* mm5 * alpha -> mm5 */ |
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872 psrlw_i2r(8, mm5); /* mm5 >> 8 -> mm5 */ |
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873 paddw_r2r(mm5, mm6); /* mm5 + mm6(dst) -> mm6 */ |
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874 psllq_i2r(5, mm6); /* mm6 << 5 -> mm6 */ |
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875 pand_r2r(mm4, mm6); /* mm6 & MASKGREEN -> mm6 */ |
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876 |
|
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877 movq_r2r(mm1, mm5); /* MASKRED -> mm5 */ |
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878 por_r2r(mm7, mm5); /* MASKBLUE | mm5 -> mm5 */ |
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879 pand_r2r(mm5, mm3); /* mm3 & mm5(!MASKGREEN) -> mm3 */ |
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880 por_r2r(mm6, mm3); /* save new greens in dsts */ |
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881 |
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882 /* blue */ |
|
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883 movq_r2r(mm2, mm5); /* src -> mm5 */ |
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884 pand_r2r(mm7 , mm5); /* src & MASKRED -> mm5[000b 000b 000b 000b] */ |
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885 |
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886 movq_r2r(mm3, mm6); /* dst -> mm6 */ |
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887 pand_r2r(mm7 , mm6); /* dst & MASKBLUE -> mm6[000b 000b 000b 000b] */ |
|
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888 |
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889 /* blend */ |
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890 psubw_r2r(mm6, mm5);/* src - dst -> mm5 */ |
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891 pmullw_r2r(mm0, mm5); /* mm5 * alpha -> mm5 */ |
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892 psrlw_i2r(8, mm5); /* mm5 >> 8 -> mm5 */ |
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893 paddw_r2r(mm5, mm6); /* mm5 + mm6(dst) -> mm6 */ |
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894 pand_r2r(mm7, mm6); /* mm6 & MASKBLUE -> mm6 */ |
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895 |
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896 movq_r2r(mm1, mm5); /* MASKRED -> mm5 */ |
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897 por_r2r(mm4, mm5); /* MASKGREEN | mm5 -> mm5 */ |
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898 pand_r2r(mm5, mm3); /* mm3 & mm5(!MASKBLUE) -> mm3 */ |
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899 por_r2r(mm6, mm3); /* save new blues in dsts */ |
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900 |
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901 movq_r2m(mm3, *dstp);/* mm3 -> 4 dst pixels */ |
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902 |
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903 srcp += 4; |
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904 dstp += 4; |
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905 }, width); |
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906 srcp += srcskip; |
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907 dstp += dstskip; |
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908 } |
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909 emms(); |
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910 } |
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911 } |
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912 |
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913 /* fast RGB555->RGB555 blending with surface alpha */ |
|
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914 static void Blit555to555SurfaceAlphaMMX(SDL_BlitInfo *info) |
|
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915 { |
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916 unsigned alpha = info->src->alpha; /* downscale alpha to 5 bits */ |
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917 if(alpha == 128) { |
|
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918 Blit16to16SurfaceAlpha128(info, 0xfbde); |
|
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919 } else { |
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920 int width = info->d_width; |
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921 int height = info->d_height; |
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922 Uint16 *srcp = (Uint16 *)info->s_pixels; |
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923 int srcskip = info->s_skip >> 1; |
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924 Uint16 *dstp = (Uint16 *)info->d_pixels; |
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925 int dstskip = info->d_skip >> 1; |
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926 Uint32 s, d; |
|
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927 Uint8 load[8]; |
|
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928 |
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929 alpha &= ~(1+2+4); /* cut alpha to get the exact same behaviour */ |
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930 *(Uint64 *)load = alpha; |
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931 alpha >>= 3; /* downscale alpha to 5 bits */ |
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932 |
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933 movq_m2r(*load, mm0); /* alpha(0000000A) -> mm0 */ |
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934 punpcklwd_r2r(mm0, mm0); /* 00000A0A -> mm0 */ |
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935 punpcklwd_r2r(mm0, mm0); /* 0A0A0A0A -> mm0 */ |
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936 |
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937 /* Setup the 555 color channel masks */ |
|
720
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938 *(Uint64 *)load = 0x7C007C007C007C00ULL; |
|
689
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939 movq_m2r(*load, mm1); /* MASKRED -> mm1 */ |
|
720
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940 *(Uint64 *)load = 0x03E003E003E003E0ULL; |
|
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941 movq_m2r(*load, mm4); /* MASKGREEN -> mm4 */ |
|
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942 *(Uint64 *)load = 0x001F001F001F001FULL; |
|
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943 movq_m2r(*load, mm7); /* MASKBLUE -> mm7 */ |
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944 while(height--) { |
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945 DUFFS_LOOP_QUATRO2( |
|
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946 { |
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947 s = *srcp++; |
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948 d = *dstp; |
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949 /* |
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950 * shift out the middle component (green) to |
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951 * the high 16 bits, and process all three RGB |
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952 * components at the same time. |
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953 */ |
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954 s = (s | s << 16) & 0x03e07c1f; |
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955 d = (d | d << 16) & 0x03e07c1f; |
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956 d += (s - d) * alpha >> 5; |
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957 d &= 0x03e07c1f; |
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958 *dstp++ = d | d >> 16; |
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959 },{ |
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960 s = *srcp++; |
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961 d = *dstp; |
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962 /* |
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963 * shift out the middle component (green) to |
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964 * the high 16 bits, and process all three RGB |
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965 * components at the same time. |
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966 */ |
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967 s = (s | s << 16) & 0x03e07c1f; |
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968 d = (d | d << 16) & 0x03e07c1f; |
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969 d += (s - d) * alpha >> 5; |
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970 d &= 0x03e07c1f; |
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971 *dstp++ = d | d >> 16; |
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972 s = *srcp++; |
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973 d = *dstp; |
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974 /* |
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975 * shift out the middle component (green) to |
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976 * the high 16 bits, and process all three RGB |
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977 * components at the same time. |
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978 */ |
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979 s = (s | s << 16) & 0x03e07c1f; |
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980 d = (d | d << 16) & 0x03e07c1f; |
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981 d += (s - d) * alpha >> 5; |
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982 d &= 0x03e07c1f; |
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983 *dstp++ = d | d >> 16; |
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984 },{ |
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985 movq_m2r((*dstp), mm3);/* 4 dst pixels -> mm3 */ |
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986 movq_m2r((*srcp), mm2);/* 4 src pixels -> mm2 */ |
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987 |
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988 /* RED */ |
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989 movq_r2r(mm2, mm5); /* src -> mm5 */ |
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990 pand_r2r(mm1 , mm5); /* src & MASKRED -> mm5 */ |
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991 psrlq_i2r(10, mm5); /* mm5 >> 10 -> mm5 [000r 000r 000r 000r] */ |
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992 |
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993 movq_r2r(mm3, mm6); /* dst -> mm6 */ |
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994 pand_r2r(mm1 , mm6); /* dst & MASKRED -> mm6 */ |
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995 psrlq_i2r(10, mm6); /* mm6 >> 10 -> mm6 [000r 000r 000r 000r] */ |
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996 |
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997 /* blend */ |
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998 psubw_r2r(mm6, mm5);/* src - dst -> mm5 */ |
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999 pmullw_r2r(mm0, mm5); /* mm5 * alpha -> mm5 */ |
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1000 psrlw_i2r(8, mm5); /* mm5 >> 8 -> mm5 */ |
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1001 paddw_r2r(mm5, mm6); /* mm5 + mm6(dst) -> mm6 */ |
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1002 psllq_i2r(10, mm6); /* mm6 << 10 -> mm6 */ |
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1003 pand_r2r(mm1, mm6); /* mm6 & MASKRED -> mm6 */ |
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1004 |
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1005 movq_r2r(mm4, mm5); /* MASKGREEN -> mm5 */ |
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1006 por_r2r(mm7, mm5); /* MASKBLUE | mm5 -> mm5 */ |
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1007 pand_r2r(mm5, mm3); /* mm3 & mm5(!MASKRED) -> mm3 */ |
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1008 por_r2r(mm6, mm3); /* save new reds in dsts */ |
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1009 |
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1010 /* green */ |
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1011 movq_r2r(mm2, mm5); /* src -> mm5 */ |
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1012 pand_r2r(mm4 , mm5); /* src & MASKGREEN -> mm5 */ |
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1013 psrlq_i2r(5, mm5); /* mm5 >> 5 -> mm5 [000g 000g 000g 000g] */ |
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1014 |
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1015 movq_r2r(mm3, mm6); /* dst -> mm6 */ |
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1016 pand_r2r(mm4 , mm6); /* dst & MASKGREEN -> mm6 */ |
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1017 psrlq_i2r(5, mm6); /* mm6 >> 5 -> mm6 [000g 000g 000g 000g] */ |
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1018 |
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1019 /* blend */ |
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1020 psubw_r2r(mm6, mm5);/* src - dst -> mm5 */ |
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1021 pmullw_r2r(mm0, mm5); /* mm5 * alpha -> mm5 */ |
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1022 psrlw_i2r(8, mm5); /* mm5 >> 8 -> mm5 */ |
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1023 paddw_r2r(mm5, mm6); /* mm5 + mm6(dst) -> mm6 */ |
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1024 psllq_i2r(5, mm6); /* mm6 << 5 -> mm6 */ |
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1025 pand_r2r(mm4, mm6); /* mm6 & MASKGREEN -> mm6 */ |
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1026 |
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1027 movq_r2r(mm1, mm5); /* MASKRED -> mm5 */ |
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1028 por_r2r(mm7, mm5); /* MASKBLUE | mm5 -> mm5 */ |
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1029 pand_r2r(mm5, mm3); /* mm3 & mm5(!MASKGREEN) -> mm3 */ |
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1030 por_r2r(mm6, mm3); /* save new greens in dsts */ |
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1031 |
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1032 /* blue */ |
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1033 movq_r2r(mm2, mm5); /* src -> mm5 */ |
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1034 pand_r2r(mm7 , mm5); /* src & MASKRED -> mm5[000b 000b 000b 000b] */ |
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1035 |
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1036 movq_r2r(mm3, mm6); /* dst -> mm6 */ |
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1037 pand_r2r(mm7 , mm6); /* dst & MASKBLUE -> mm6[000b 000b 000b 000b] */ |
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1038 |
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1039 /* blend */ |
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1040 psubw_r2r(mm6, mm5);/* src - dst -> mm5 */ |
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1041 pmullw_r2r(mm0, mm5); /* mm5 * alpha -> mm5 */ |
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1042 psrlw_i2r(8, mm5); /* mm5 >> 8 -> mm5 */ |
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1043 paddw_r2r(mm5, mm6); /* mm5 + mm6(dst) -> mm6 */ |
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1044 pand_r2r(mm7, mm6); /* mm6 & MASKBLUE -> mm6 */ |
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1045 |
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1046 movq_r2r(mm1, mm5); /* MASKRED -> mm5 */ |
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1047 por_r2r(mm4, mm5); /* MASKGREEN | mm5 -> mm5 */ |
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1048 pand_r2r(mm5, mm3); /* mm3 & mm5(!MASKBLUE) -> mm3 */ |
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1049 por_r2r(mm6, mm3); /* save new blues in dsts */ |
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1050 |
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1051 movq_r2m(mm3, *dstp);/* mm3 -> 4 dst pixels */ |
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1052 |
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1053 srcp += 4; |
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1054 dstp += 4; |
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1055 }, width); |
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1056 srcp += srcskip; |
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1057 dstp += dstskip; |
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1058 } |
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1059 emms(); |
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1060 } |
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1061 } |
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1062 #endif |
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1063 |
|
1
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1064 /* fast RGB565->RGB565 blending with surface alpha */ |
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1065 static void Blit565to565SurfaceAlpha(SDL_BlitInfo *info) |
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1066 { |
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1067 unsigned alpha = info->src->alpha; |
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1068 if(alpha == 128) { |
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1069 Blit16to16SurfaceAlpha128(info, 0xf7de); |
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1070 } else { |
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1071 int width = info->d_width; |
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1072 int height = info->d_height; |
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1073 Uint16 *srcp = (Uint16 *)info->s_pixels; |
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1074 int srcskip = info->s_skip >> 1; |
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1075 Uint16 *dstp = (Uint16 *)info->d_pixels; |
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1076 int dstskip = info->d_skip >> 1; |
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1077 alpha >>= 3; /* downscale alpha to 5 bits */ |
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1078 |
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1079 while(height--) { |
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1080 DUFFS_LOOP4({ |
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1081 Uint32 s = *srcp++; |
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1082 Uint32 d = *dstp; |
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1083 /* |
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1084 * shift out the middle component (green) to |
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1085 * the high 16 bits, and process all three RGB |
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1086 * components at the same time. |
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1087 */ |
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1088 s = (s | s << 16) & 0x07e0f81f; |
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1089 d = (d | d << 16) & 0x07e0f81f; |
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1090 d += (s - d) * alpha >> 5; |
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1091 d &= 0x07e0f81f; |
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1092 *dstp++ = d | d >> 16; |
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1093 }, width); |
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1094 srcp += srcskip; |
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1095 dstp += dstskip; |
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1096 } |
| 0 | 1097 } |
| 1098 } | |
| 1099 | |
| 1100 /* fast RGB555->RGB555 blending with surface alpha */ | |
| 1101 static void Blit555to555SurfaceAlpha(SDL_BlitInfo *info) | |
| 1102 { | |
|
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1103 unsigned alpha = info->src->alpha; /* downscale alpha to 5 bits */ |
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1104 if(alpha == 128) { |
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1105 Blit16to16SurfaceAlpha128(info, 0xfbde); |
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1106 } else { |
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1107 int width = info->d_width; |
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1108 int height = info->d_height; |
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1109 Uint16 *srcp = (Uint16 *)info->s_pixels; |
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1110 int srcskip = info->s_skip >> 1; |
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1111 Uint16 *dstp = (Uint16 *)info->d_pixels; |
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1112 int dstskip = info->d_skip >> 1; |
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1113 alpha >>= 3; /* downscale alpha to 5 bits */ |
| 0 | 1114 |
|
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1115 while(height--) { |
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1116 DUFFS_LOOP4({ |
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1117 Uint32 s = *srcp++; |
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1118 Uint32 d = *dstp; |
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1119 /* |
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1120 * shift out the middle component (green) to |
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1121 * the high 16 bits, and process all three RGB |
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1122 * components at the same time. |
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1123 */ |
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1124 s = (s | s << 16) & 0x03e07c1f; |
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1125 d = (d | d << 16) & 0x03e07c1f; |
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1126 d += (s - d) * alpha >> 5; |
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1127 d &= 0x03e07c1f; |
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1128 *dstp++ = d | d >> 16; |
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1129 }, width); |
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1130 srcp += srcskip; |
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1131 dstp += dstskip; |
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1132 } |
| 0 | 1133 } |
| 1134 } | |
| 1135 | |
| 1136 /* fast ARGB8888->RGB565 blending with pixel alpha */ | |
| 1137 static void BlitARGBto565PixelAlpha(SDL_BlitInfo *info) | |
| 1138 { | |
| 1139 int width = info->d_width; | |
| 1140 int height = info->d_height; | |
| 1141 Uint32 *srcp = (Uint32 *)info->s_pixels; | |
| 1142 int srcskip = info->s_skip >> 2; | |
| 1143 Uint16 *dstp = (Uint16 *)info->d_pixels; | |
| 1144 int dstskip = info->d_skip >> 1; | |
| 1145 | |
| 1146 while(height--) { | |
| 1147 DUFFS_LOOP4({ | |
| 1148 Uint32 s = *srcp; | |
| 1149 unsigned alpha = s >> 27; /* downscale alpha to 5 bits */ | |
| 1150 /* FIXME: Here we special-case opaque alpha since the | |
| 1151 compositioning used (>>8 instead of /255) doesn't handle | |
| 1152 it correctly. Also special-case alpha=0 for speed? | |
| 1153 Benchmark this! */ | |
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1154 if(alpha) { |
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1155 if(alpha == (SDL_ALPHA_OPAQUE >> 3)) { |
| 0 | 1156 *dstp = (s >> 8 & 0xf800) + (s >> 5 & 0x7e0) |
| 1157 + (s >> 3 & 0x1f); | |
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1158 } else { |
| 0 | 1159 Uint32 d = *dstp; |
| 1160 /* | |
| 1161 * convert source and destination to G0RAB65565 | |
| 1162 * and blend all components at the same time | |
| 1163 */ | |
| 1164 s = ((s & 0xfc00) << 11) + (s >> 8 & 0xf800) | |
| 1165 + (s >> 3 & 0x1f); | |
| 1166 d = (d | d << 16) & 0x07e0f81f; | |
| 1167 d += (s - d) * alpha >> 5; | |
| 1168 d &= 0x07e0f81f; | |
| 1169 *dstp = d | d >> 16; | |
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1170 } |
| 0 | 1171 } |
| 1172 srcp++; | |
| 1173 dstp++; | |
| 1174 }, width); | |
| 1175 srcp += srcskip; | |
| 1176 dstp += dstskip; | |
| 1177 } | |
| 1178 } | |
| 1179 | |
| 1180 /* fast ARGB8888->RGB555 blending with pixel alpha */ | |
| 1181 static void BlitARGBto555PixelAlpha(SDL_BlitInfo *info) | |
| 1182 { | |
| 1183 int width = info->d_width; | |
| 1184 int height = info->d_height; | |
| 1185 Uint32 *srcp = (Uint32 *)info->s_pixels; | |
| 1186 int srcskip = info->s_skip >> 2; | |
| 1187 Uint16 *dstp = (Uint16 *)info->d_pixels; | |
| 1188 int dstskip = info->d_skip >> 1; | |
| 1189 | |
| 1190 while(height--) { | |
| 1191 DUFFS_LOOP4({ | |
| 1192 unsigned alpha; | |
| 1193 Uint32 s = *srcp; | |
| 1194 alpha = s >> 27; /* downscale alpha to 5 bits */ | |
| 1195 /* FIXME: Here we special-case opaque alpha since the | |
| 1196 compositioning used (>>8 instead of /255) doesn't handle | |
| 1197 it correctly. Also special-case alpha=0 for speed? | |
| 1198 Benchmark this! */ | |
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1199 if(alpha) { |
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1200 if(alpha == (SDL_ALPHA_OPAQUE >> 3)) { |
| 0 | 1201 *dstp = (s >> 9 & 0x7c00) + (s >> 6 & 0x3e0) |
| 1202 + (s >> 3 & 0x1f); | |
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1203 } else { |
| 0 | 1204 Uint32 d = *dstp; |
| 1205 /* | |
| 1206 * convert source and destination to G0RAB65565 | |
| 1207 * and blend all components at the same time | |
| 1208 */ | |
| 1209 s = ((s & 0xf800) << 10) + (s >> 9 & 0x7c00) | |
| 1210 + (s >> 3 & 0x1f); | |
| 1211 d = (d | d << 16) & 0x03e07c1f; | |
| 1212 d += (s - d) * alpha >> 5; | |
| 1213 d &= 0x03e07c1f; | |
| 1214 *dstp = d | d >> 16; | |
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1215 } |
| 0 | 1216 } |
| 1217 srcp++; | |
| 1218 dstp++; | |
| 1219 }, width); | |
| 1220 srcp += srcskip; | |
| 1221 dstp += dstskip; | |
| 1222 } | |
| 1223 } | |
| 1224 | |
| 1225 /* General (slow) N->N blending with per-surface alpha */ | |
| 1226 static void BlitNtoNSurfaceAlpha(SDL_BlitInfo *info) | |
| 1227 { | |
| 1228 int width = info->d_width; | |
| 1229 int height = info->d_height; | |
| 1230 Uint8 *src = info->s_pixels; | |
| 1231 int srcskip = info->s_skip; | |
| 1232 Uint8 *dst = info->d_pixels; | |
| 1233 int dstskip = info->d_skip; | |
| 1234 SDL_PixelFormat *srcfmt = info->src; | |
| 1235 SDL_PixelFormat *dstfmt = info->dst; | |
| 1236 int srcbpp = srcfmt->BytesPerPixel; | |
| 1237 int dstbpp = dstfmt->BytesPerPixel; | |
| 1238 unsigned sA = srcfmt->alpha; | |
| 1239 unsigned dA = dstfmt->Amask ? SDL_ALPHA_OPAQUE : 0; | |
| 1240 | |
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1241 if(sA) { |
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1242 while ( height-- ) { |
| 0 | 1243 DUFFS_LOOP4( |
| 1244 { | |
| 1245 Uint32 pixel; | |
| 1246 unsigned sR; | |
| 1247 unsigned sG; | |
| 1248 unsigned sB; | |
| 1249 unsigned dR; | |
| 1250 unsigned dG; | |
| 1251 unsigned dB; | |
| 1252 DISEMBLE_RGB(src, srcbpp, srcfmt, pixel, sR, sG, sB); | |
| 1253 DISEMBLE_RGB(dst, dstbpp, dstfmt, pixel, dR, dG, dB); | |
| 1254 ALPHA_BLEND(sR, sG, sB, sA, dR, dG, dB); | |
| 1255 ASSEMBLE_RGBA(dst, dstbpp, dstfmt, dR, dG, dB, dA); | |
| 1256 src += srcbpp; | |
| 1257 dst += dstbpp; | |
| 1258 }, | |
| 1259 width); | |
| 1260 src += srcskip; | |
| 1261 dst += dstskip; | |
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1262 } |
| 0 | 1263 } |
| 1264 } | |
| 1265 | |
| 1266 /* General (slow) colorkeyed N->N blending with per-surface alpha */ | |
| 1267 static void BlitNtoNSurfaceAlphaKey(SDL_BlitInfo *info) | |
| 1268 { | |
| 1269 int width = info->d_width; | |
| 1270 int height = info->d_height; | |
| 1271 Uint8 *src = info->s_pixels; | |
| 1272 int srcskip = info->s_skip; | |
| 1273 Uint8 *dst = info->d_pixels; | |
| 1274 int dstskip = info->d_skip; | |
| 1275 SDL_PixelFormat *srcfmt = info->src; | |
| 1276 SDL_PixelFormat *dstfmt = info->dst; | |
| 1277 Uint32 ckey = srcfmt->colorkey; | |
| 1278 int srcbpp = srcfmt->BytesPerPixel; | |
| 1279 int dstbpp = dstfmt->BytesPerPixel; | |
| 1280 unsigned sA = srcfmt->alpha; | |
| 1281 unsigned dA = dstfmt->Amask ? SDL_ALPHA_OPAQUE : 0; | |
| 1282 | |
| 1283 while ( height-- ) { | |
| 1284 DUFFS_LOOP4( | |
| 1285 { | |
| 1286 Uint32 pixel; | |
| 1287 unsigned sR; | |
| 1288 unsigned sG; | |
| 1289 unsigned sB; | |
| 1290 unsigned dR; | |
| 1291 unsigned dG; | |
| 1292 unsigned dB; | |
| 1293 RETRIEVE_RGB_PIXEL(src, srcbpp, pixel); | |
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1294 if(sA && pixel != ckey) { |
| 0 | 1295 RGB_FROM_PIXEL(pixel, srcfmt, sR, sG, sB); |
| 1296 DISEMBLE_RGB(dst, dstbpp, dstfmt, pixel, dR, dG, dB); | |
| 1297 ALPHA_BLEND(sR, sG, sB, sA, dR, dG, dB); | |
| 1298 ASSEMBLE_RGBA(dst, dstbpp, dstfmt, dR, dG, dB, dA); | |
| 1299 } | |
| 1300 src += srcbpp; | |
| 1301 dst += dstbpp; | |
| 1302 }, | |
| 1303 width); | |
| 1304 src += srcskip; | |
| 1305 dst += dstskip; | |
| 1306 } | |
| 1307 } | |
| 1308 | |
| 1309 /* General (slow) N->N blending with pixel alpha */ | |
| 1310 static void BlitNtoNPixelAlpha(SDL_BlitInfo *info) | |
| 1311 { | |
| 1312 int width = info->d_width; | |
| 1313 int height = info->d_height; | |
| 1314 Uint8 *src = info->s_pixels; | |
| 1315 int srcskip = info->s_skip; | |
| 1316 Uint8 *dst = info->d_pixels; | |
| 1317 int dstskip = info->d_skip; | |
| 1318 SDL_PixelFormat *srcfmt = info->src; | |
| 1319 SDL_PixelFormat *dstfmt = info->dst; | |
| 1320 | |
| 1321 int srcbpp; | |
| 1322 int dstbpp; | |
| 1323 | |
| 1324 /* Set up some basic variables */ | |
| 1325 srcbpp = srcfmt->BytesPerPixel; | |
| 1326 dstbpp = dstfmt->BytesPerPixel; | |
| 1327 | |
| 1328 /* FIXME: for 8bpp source alpha, this doesn't get opaque values | |
| 1329 quite right. for <8bpp source alpha, it gets them very wrong | |
| 1330 (check all macros!) | |
| 1331 It is unclear whether there is a good general solution that doesn't | |
| 1332 need a branch (or a divide). */ | |
| 1333 while ( height-- ) { | |
| 1334 DUFFS_LOOP4( | |
| 1335 { | |
| 1336 Uint32 pixel; | |
| 1337 unsigned sR; | |
| 1338 unsigned sG; | |
| 1339 unsigned sB; | |
| 1340 unsigned dR; | |
| 1341 unsigned dG; | |
| 1342 unsigned dB; | |
| 1343 unsigned sA; | |
| 1344 unsigned dA; | |
| 1345 DISEMBLE_RGBA(src, srcbpp, srcfmt, pixel, sR, sG, sB, sA); | |
|
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1346 if(sA) { |
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1347 DISEMBLE_RGBA(dst, dstbpp, dstfmt, pixel, dR, dG, dB, dA); |
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1348 ALPHA_BLEND(sR, sG, sB, sA, dR, dG, dB); |
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1349 ASSEMBLE_RGBA(dst, dstbpp, dstfmt, dR, dG, dB, dA); |
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1350 } |
| 0 | 1351 src += srcbpp; |
| 1352 dst += dstbpp; | |
| 1353 }, | |
| 1354 width); | |
| 1355 src += srcskip; | |
| 1356 dst += dstskip; | |
| 1357 } | |
| 1358 } | |
| 1359 | |
| 1360 | |
| 1361 SDL_loblit SDL_CalculateAlphaBlit(SDL_Surface *surface, int blit_index) | |
| 1362 { | |
| 1363 SDL_PixelFormat *sf = surface->format; | |
| 1364 SDL_PixelFormat *df = surface->map->dst->format; | |
| 1365 | |
| 1366 if(sf->Amask == 0) { | |
| 1367 if((surface->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY) { | |
| 1368 if(df->BytesPerPixel == 1) | |
| 1369 return BlitNto1SurfaceAlphaKey; | |
| 1370 else | |
| 1371 return BlitNtoNSurfaceAlphaKey; | |
| 1372 } else { | |
| 1373 /* Per-surface alpha blits */ | |
| 1374 switch(df->BytesPerPixel) { | |
| 1375 case 1: | |
| 1376 return BlitNto1SurfaceAlpha; | |
| 1377 | |
| 1378 case 2: | |
| 1379 if(surface->map->identity) { | |
| 1380 if(df->Gmask == 0x7e0) | |
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1381 { |
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1382 #if defined(i386) && defined(__GNUC__) && defined(USE_ASMBLIT) |
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1383 if(SDL_HasMMX()) |
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1384 return Blit565to565SurfaceAlphaMMX; |
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1385 else |
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1386 #endif |
| 0 | 1387 return Blit565to565SurfaceAlpha; |
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1388 } |
| 0 | 1389 else if(df->Gmask == 0x3e0) |
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1390 { |
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1391 #if defined(i386) && defined(__GNUC__) && defined(USE_ASMBLIT) |
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1392 if(SDL_HasMMX()) |
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1393 return Blit555to555SurfaceAlphaMMX; |
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1394 else |
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1395 #endif |
| 0 | 1396 return Blit555to555SurfaceAlpha; |
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1397 } |
| 0 | 1398 } |
| 1399 return BlitNtoNSurfaceAlpha; | |
| 1400 | |
| 1401 case 4: | |
| 1402 if(sf->Rmask == df->Rmask | |
| 1403 && sf->Gmask == df->Gmask | |
| 1404 && sf->Bmask == df->Bmask | |
| 1405 && (sf->Rmask | sf->Gmask | sf->Bmask) == 0xffffff | |
| 1406 && sf->BytesPerPixel == 4) | |
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1407 { |
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1408 #if defined(i386) && defined(__GNUC__) && defined(USE_ASMBLIT) |
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1409 if(SDL_HasMMX()) |
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1410 return BlitRGBtoRGBSurfaceAlphaMMX; |
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1411 else |
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1412 #endif |
| 0 | 1413 return BlitRGBtoRGBSurfaceAlpha; |
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1414 } |
| 0 | 1415 else |
| 1416 return BlitNtoNSurfaceAlpha; | |
| 1417 | |
| 1418 case 3: | |
| 1419 default: | |
| 1420 return BlitNtoNSurfaceAlpha; | |
| 1421 } | |
| 1422 } | |
| 1423 } else { | |
| 1424 /* Per-pixel alpha blits */ | |
| 1425 switch(df->BytesPerPixel) { | |
| 1426 case 1: | |
| 1427 return BlitNto1PixelAlpha; | |
| 1428 | |
| 1429 case 2: | |
| 1430 if(sf->BytesPerPixel == 4 && sf->Amask == 0xff000000 | |
| 1431 && sf->Gmask == 0xff00 | |
| 1432 && ((sf->Rmask == 0xff && df->Rmask == 0x1f) | |
| 1433 || (sf->Bmask == 0xff && df->Bmask == 0x1f))) { | |
| 1434 if(df->Gmask == 0x7e0) | |
| 1435 return BlitARGBto565PixelAlpha; | |
| 1436 else if(df->Gmask == 0x3e0) | |
| 1437 return BlitARGBto555PixelAlpha; | |
| 1438 } | |
| 1439 return BlitNtoNPixelAlpha; | |
| 1440 | |
| 1441 case 4: | |
| 1442 if(sf->Amask == 0xff000000 | |
| 1443 && sf->Rmask == df->Rmask | |
| 1444 && sf->Gmask == df->Gmask | |
| 1445 && sf->Bmask == df->Bmask | |
| 1446 && sf->BytesPerPixel == 4) | |
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1447 { |
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1448 #if defined(i386) && defined(__GNUC__) && defined(USE_ASMBLIT) |
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1449 if(SDL_Has3DNow()) |
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1450 return BlitRGBtoRGBPixelAlphaMMX3DNOW; |
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1451 else |
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1452 if(SDL_HasMMX()) |
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1453 return BlitRGBtoRGBPixelAlphaMMX; |
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1454 else |
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1455 #endif |
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1456 return BlitRGBtoRGBPixelAlpha; |
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1457 } |
| 0 | 1458 return BlitNtoNPixelAlpha; |
| 1459 | |
| 1460 case 3: | |
| 1461 default: | |
| 1462 return BlitNtoNPixelAlpha; | |
| 1463 } | |
| 1464 } | |
| 1465 } | |
| 1466 |