Mercurial > sdl-ios-xcode
annotate src/video/SDL_blit_A.c @ 866:0a45995a7fc3
Date: Tue, 2 Mar 2004 11:34:54 +0100
From: Bartosz Fenski aka fEnIo
Subject: outdated entry in INSTALL file
I've just found in INSTALL file:
If you are cross-compiling from Linux to Win32, you should read
the file README.Win32
But you don't shipped this file with SDL. I've found in CVS logs that
this file has been deleted and this information is now in FAQ.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 02 Mar 2004 13:01:02 +0000 |
| parents | b8d311d90021 |
| children | 9ef41050100c |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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Updated copyright information for 2004 (Happy New Year!)
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3 Copyright (C) 1997-2004 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
| 6 modify it under the terms of the GNU Library General Public | |
| 7 License as published by the Free Software Foundation; either | |
| 8 version 2 of the License, or (at your option) any later version. | |
| 9 | |
| 10 This library is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 Library General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU Library General Public | |
| 16 License along with this library; if not, write to the Free | |
| 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 | |
| 19 Sam Lantinga | |
|
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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 |