Mercurial > sdl-ios-xcode
annotate src/video/SDL_blit_A.c @ 689:5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
From: Stephane Marchesin
Subject: Re: [SDL] [patch] MMX alpha blit patches with MMX detection
I think everything is correct now. I've done as much testing as I could,
but some real-world testing wouldn't hurt, I think.
The patch is here : http://icps.u-strasbg.fr/~marchesin/sdl_mmxblit.patch
If you do byte-by-byte comparison of the output between C and MMX
functions, you'll notice that the results for 555 and 565 RGB alpha
blits aren't exactly the same. This is because MMX functions for 555 and
565 RGB have an higher accuracy. If you want the exact same behaviour
that's possible by masking the three lower alpha bits in the MMX
functions. Just ask !
I removed one MMX function because after I fixed it to match its C
equivalent, it revealed to be slower than the C version on a PIII
(although a bit faster on an Athlon XP).
I've also added MMX and PIII replacements for SDL_memcpy. Those provide
some speed up in testvidinfo -benchmark (at least for me, under linux &
X11).
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Fri, 22 Aug 2003 05:51:19 +0000 |
| parents | f6ffac90895c |
| children | f90d80d68071 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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Updated copyright information for 2002
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
| 6 modify it under the terms of the GNU Library General Public | |
| 7 License as published by the Free Software Foundation; either | |
| 8 version 2 of the License, or (at your option) any later version. | |
| 9 | |
| 10 This library is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 Library General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU Library General Public | |
| 16 License along with this library; if not, write to the Free | |
| 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 | |
| 19 Sam Lantinga | |
|
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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 #ifdef SAVE_RCSID | |
| 24 static char rcsid = | |
| 25 "@(#) $Id$"; | |
| 26 #endif | |
| 27 | |
| 28 #include <stdio.h> | |
| 29 | |
| 30 #include "SDL_types.h" | |
| 31 #include "SDL_video.h" | |
| 32 #include "SDL_blit.h" | |
| 33 | |
|
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34 #if defined(i386) && defined(__GNUC__) && defined(USE_ASMBLIT) |
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35 #include "mmx.h" |
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36 /* Function to check the CPU flags */ |
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37 #define MMX_CPU 0x800000 |
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38 #define TDNOW_CPU 0x80000000 |
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39 #define CPU_Flags() Hermes_X86_CPU() |
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40 #define X86_ASSEMBLER |
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41 #define HermesConverterInterface void |
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42 #define HermesClearInterface void |
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43 #define STACKCALL |
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44 #include "HeadX86.h" |
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45 #endif |
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46 |
| 0 | 47 /* Functions to perform alpha blended blitting */ |
| 48 | |
| 49 /* N->1 blending with per-surface alpha */ | |
| 50 static void BlitNto1SurfaceAlpha(SDL_BlitInfo *info) | |
| 51 { | |
| 52 int width = info->d_width; | |
| 53 int height = info->d_height; | |
| 54 Uint8 *src = info->s_pixels; | |
| 55 int srcskip = info->s_skip; | |
| 56 Uint8 *dst = info->d_pixels; | |
| 57 int dstskip = info->d_skip; | |
| 58 Uint8 *palmap = info->table; | |
| 59 SDL_PixelFormat *srcfmt = info->src; | |
| 60 SDL_PixelFormat *dstfmt = info->dst; | |
| 61 int srcbpp = srcfmt->BytesPerPixel; | |
| 62 | |
| 63 const unsigned A = srcfmt->alpha; | |
| 64 | |
| 65 while ( height-- ) { | |
| 66 DUFFS_LOOP4( | |
| 67 { | |
| 68 Uint32 pixel; | |
| 69 unsigned sR; | |
| 70 unsigned sG; | |
| 71 unsigned sB; | |
| 72 unsigned dR; | |
| 73 unsigned dG; | |
| 74 unsigned dB; | |
| 75 DISEMBLE_RGB(src, srcbpp, srcfmt, pixel, sR, sG, sB); | |
| 76 dR = dstfmt->palette->colors[*dst].r; | |
| 77 dG = dstfmt->palette->colors[*dst].g; | |
| 78 dB = dstfmt->palette->colors[*dst].b; | |
| 79 ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB); | |
| 80 dR &= 0xff; | |
| 81 dG &= 0xff; | |
| 82 dB &= 0xff; | |
| 83 /* Pack RGB into 8bit pixel */ | |
| 84 if ( palmap == NULL ) { | |
| 85 *dst =((dR>>5)<<(3+2))| | |
| 86 ((dG>>5)<<(2))| | |
| 87 ((dB>>6)<<(0)); | |
| 88 } else { | |
| 89 *dst = palmap[((dR>>5)<<(3+2))| | |
| 90 ((dG>>5)<<(2)) | | |
| 91 ((dB>>6)<<(0))]; | |
| 92 } | |
| 93 dst++; | |
| 94 src += srcbpp; | |
| 95 }, | |
| 96 width); | |
| 97 src += srcskip; | |
| 98 dst += dstskip; | |
| 99 } | |
| 100 } | |
| 101 | |
| 102 /* N->1 blending with pixel alpha */ | |
| 103 static void BlitNto1PixelAlpha(SDL_BlitInfo *info) | |
| 104 { | |
| 105 int width = info->d_width; | |
| 106 int height = info->d_height; | |
| 107 Uint8 *src = info->s_pixels; | |
| 108 int srcskip = info->s_skip; | |
| 109 Uint8 *dst = info->d_pixels; | |
| 110 int dstskip = info->d_skip; | |
| 111 Uint8 *palmap = info->table; | |
| 112 SDL_PixelFormat *srcfmt = info->src; | |
| 113 SDL_PixelFormat *dstfmt = info->dst; | |
| 114 int srcbpp = srcfmt->BytesPerPixel; | |
| 115 | |
| 116 /* FIXME: fix alpha bit field expansion here too? */ | |
| 117 while ( height-- ) { | |
| 118 DUFFS_LOOP4( | |
| 119 { | |
| 120 Uint32 pixel; | |
| 121 unsigned sR; | |
| 122 unsigned sG; | |
| 123 unsigned sB; | |
| 124 unsigned sA; | |
| 125 unsigned dR; | |
| 126 unsigned dG; | |
| 127 unsigned dB; | |
| 128 DISEMBLE_RGBA(src,srcbpp,srcfmt,pixel,sR,sG,sB,sA); | |
| 129 dR = dstfmt->palette->colors[*dst].r; | |
| 130 dG = dstfmt->palette->colors[*dst].g; | |
| 131 dB = dstfmt->palette->colors[*dst].b; | |
| 132 ALPHA_BLEND(sR, sG, sB, sA, dR, dG, dB); | |
| 133 dR &= 0xff; | |
| 134 dG &= 0xff; | |
| 135 dB &= 0xff; | |
| 136 /* Pack RGB into 8bit pixel */ | |
| 137 if ( palmap == NULL ) { | |
| 138 *dst =((dR>>5)<<(3+2))| | |
| 139 ((dG>>5)<<(2))| | |
| 140 ((dB>>6)<<(0)); | |
| 141 } else { | |
| 142 *dst = palmap[((dR>>5)<<(3+2))| | |
| 143 ((dG>>5)<<(2)) | | |
| 144 ((dB>>6)<<(0)) ]; | |
| 145 } | |
| 146 dst++; | |
| 147 src += srcbpp; | |
| 148 }, | |
| 149 width); | |
| 150 src += srcskip; | |
| 151 dst += dstskip; | |
| 152 } | |
| 153 } | |
| 154 | |
| 155 /* colorkeyed N->1 blending with per-surface alpha */ | |
| 156 static void BlitNto1SurfaceAlphaKey(SDL_BlitInfo *info) | |
| 157 { | |
| 158 int width = info->d_width; | |
| 159 int height = info->d_height; | |
| 160 Uint8 *src = info->s_pixels; | |
| 161 int srcskip = info->s_skip; | |
| 162 Uint8 *dst = info->d_pixels; | |
| 163 int dstskip = info->d_skip; | |
| 164 Uint8 *palmap = info->table; | |
| 165 SDL_PixelFormat *srcfmt = info->src; | |
| 166 SDL_PixelFormat *dstfmt = info->dst; | |
| 167 int srcbpp = srcfmt->BytesPerPixel; | |
| 168 Uint32 ckey = srcfmt->colorkey; | |
| 169 | |
| 170 const int A = srcfmt->alpha; | |
| 171 | |
| 172 while ( height-- ) { | |
| 173 DUFFS_LOOP( | |
| 174 { | |
| 175 Uint32 pixel; | |
| 176 unsigned sR; | |
| 177 unsigned sG; | |
| 178 unsigned sB; | |
| 179 unsigned dR; | |
| 180 unsigned dG; | |
| 181 unsigned dB; | |
| 182 DISEMBLE_RGB(src, srcbpp, srcfmt, pixel, sR, sG, sB); | |
| 183 if ( pixel != ckey ) { | |
| 184 dR = dstfmt->palette->colors[*dst].r; | |
| 185 dG = dstfmt->palette->colors[*dst].g; | |
| 186 dB = dstfmt->palette->colors[*dst].b; | |
| 187 ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB); | |
| 188 dR &= 0xff; | |
| 189 dG &= 0xff; | |
| 190 dB &= 0xff; | |
| 191 /* Pack RGB into 8bit pixel */ | |
| 192 if ( palmap == NULL ) { | |
| 193 *dst =((dR>>5)<<(3+2))| | |
| 194 ((dG>>5)<<(2)) | | |
| 195 ((dB>>6)<<(0)); | |
| 196 } else { | |
| 197 *dst = palmap[((dR>>5)<<(3+2))| | |
| 198 ((dG>>5)<<(2)) | | |
| 199 ((dB>>6)<<(0)) ]; | |
| 200 } | |
| 201 } | |
| 202 dst++; | |
| 203 src += srcbpp; | |
| 204 }, | |
| 205 width); | |
| 206 src += srcskip; | |
| 207 dst += dstskip; | |
| 208 } | |
| 209 } | |
| 210 | |
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211 #if defined(i386) && defined(__GNUC__) && defined(USE_ASMBLIT) |
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212 /* fast RGB888->(A)RGB888 blending with surface alpha=128 special case */ |
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213 static void BlitRGBtoRGBSurfaceAlpha128MMX(SDL_BlitInfo *info) |
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214 { |
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215 int width = info->d_width; |
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216 int height = info->d_height; |
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217 Uint32 *srcp = (Uint32 *)info->s_pixels; |
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218 int srcskip = info->s_skip >> 2; |
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219 Uint32 *dstp = (Uint32 *)info->d_pixels; |
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220 int dstskip = info->d_skip >> 2; |
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221 Uint8 load[8]; |
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222 |
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223 *(Uint64 *)load = 0x00fefefe00fefefe;/* alpha128 mask */ |
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224 movq_m2r(*load, mm4); /* alpha128 mask -> mm4 */ |
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225 *(Uint64 *)load = 0x0001010100010101;/* !alpha128 mask */ |
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226 movq_m2r(*load, mm3); /* !alpha128 mask -> mm3 */ |
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227 *(Uint64 *)load = 0xFF000000FF000000;/* dst alpha mask */ |
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228 movq_m2r(*load, mm7); /* dst alpha mask -> mm7 */ |
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229 while(height--) { |
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230 DUFFS_LOOP_DOUBLE2( |
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231 { |
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232 Uint32 s = *srcp++; |
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233 Uint32 d = *dstp; |
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234 *dstp++ = ((((s & 0x00fefefe) + (d & 0x00fefefe)) >> 1) |
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235 + (s & d & 0x00010101)) | 0xff000000; |
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236 },{ |
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237 movq_m2r((*dstp), mm2);/* 2 x dst -> mm2(ARGBARGB) */ |
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238 movq_r2r(mm2, mm6); /* 2 x dst -> mm6(ARGBARGB) */ |
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239 |
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240 movq_m2r((*srcp), mm1);/* 2 x src -> mm1(ARGBARGB) */ |
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241 movq_r2r(mm1, mm5); /* 2 x src -> mm5(ARGBARGB) */ |
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242 |
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243 pand_r2r(mm4, mm6); /* dst & mask -> mm6 */ |
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244 pand_r2r(mm4, mm5); /* src & mask -> mm5 */ |
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245 paddd_r2r(mm6, mm5); /* mm6 + mm5 -> mm5 */ |
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246 psrld_i2r(1, mm5); /* mm5 >> 1 -> mm5 */ |
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247 |
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248 pand_r2r(mm1, mm2); /* src & dst -> mm2 */ |
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249 pand_r2r(mm3, mm2); /* mm2 & !mask -> mm2 */ |
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250 paddd_r2r(mm5, mm2); /* mm5 + mm2 -> mm2 */ |
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251 por_r2r(mm7, mm2); /* mm7(full alpha) | mm2 -> mm2 */ |
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252 movq_r2m(mm2, (*dstp));/* mm2 -> 2 x dst pixels */ |
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253 dstp += 2; |
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254 srcp += 2; |
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255 }, width); |
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256 srcp += srcskip; |
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257 dstp += dstskip; |
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258 } |
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259 emms(); |
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260 } |
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261 |
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262 /* fast RGB888->(A)RGB888 blending with surface alpha */ |
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263 static void BlitRGBtoRGBSurfaceAlphaMMX(SDL_BlitInfo *info) |
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264 { |
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265 unsigned alpha = info->src->alpha; |
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266 if(alpha == 128) { |
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267 BlitRGBtoRGBSurfaceAlpha128MMX(info); |
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268 } else { |
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269 int width = info->d_width; |
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270 int height = info->d_height; |
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271 Uint32 *srcp = (Uint32 *)info->s_pixels; |
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272 int srcskip = info->s_skip >> 2; |
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273 Uint32 *dstp = (Uint32 *)info->d_pixels; |
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274 int dstskip = info->d_skip >> 2; |
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275 Uint8 load[8] = {alpha, alpha, alpha, alpha, |
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276 alpha, alpha, alpha, alpha}; |
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277 |
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278 movq_m2r(*load, mm4); /* alpha -> mm4 */ |
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279 *(Uint64 *)load = 0x00FF00FF00FF00FF; |
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280 movq_m2r(*load, mm3); /* mask -> mm3 */ |
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281 pand_r2r(mm3, mm4); /* mm4 & mask -> 0A0A0A0A -> mm4 */ |
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282 *(Uint64 *)load = 0xFF000000FF000000;/* dst alpha mask */ |
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283 movq_m2r(*load, mm7); /* dst alpha mask -> mm7 */ |
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284 |
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285 while(height--) { |
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286 DUFFS_LOOP_DOUBLE2({ |
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287 /* One Pixel Blend */ |
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288 movd_m2r((*srcp), mm1);/* src(ARGB) -> mm1 (0000ARGB)*/ |
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289 punpcklbw_r2r(mm1, mm1); /* AARRGGBB -> mm1 */ |
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290 pand_r2r(mm3, mm1); /* 0A0R0G0B -> mm1 */ |
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291 |
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292 movd_m2r((*dstp), mm2);/* dst(ARGB) -> mm2 (0000ARGB)*/ |
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293 movq_r2r(mm2, mm6);/* dst(ARGB) -> mm6 (0000ARGB)*/ |
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294 punpcklbw_r2r(mm2, mm2); /* AARRGGBB -> mm2 */ |
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295 pand_r2r(mm3, mm2); /* 0A0R0G0B -> mm2 */ |
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296 |
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297 psubw_r2r(mm2, mm1);/* src - dst -> mm1 */ |
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298 pmullw_r2r(mm4, mm1); /* mm1 * alpha -> mm1 */ |
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299 psrlw_i2r(8, mm1); /* mm1 >> 8 -> mm1 */ |
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300 paddw_r2r(mm1, mm2); /* mm1 + mm2(dst) -> mm2 */ |
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301 pand_r2r(mm3, mm2); /* 0A0R0G0B -> mm2 */ |
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302 packuswb_r2r(mm2, mm2); /* ARGBARGB -> mm2 */ |
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303 por_r2r(mm7, mm2); /* mm7(full alpha) | mm2 -> mm2 */ |
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304 movd_r2m(mm2, *dstp);/* mm2 -> pixel */ |
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305 ++srcp; |
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306 ++dstp; |
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307 },{ |
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308 /* Two Pixels Blend */ |
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309 movq_m2r((*srcp), mm0);/* 2 x src -> mm0(ARGBARGB)*/ |
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310 movq_r2r(mm0, mm1); /* 2 x src -> mm1(ARGBARGB) */ |
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311 punpcklbw_r2r(mm0, mm0); /* low - AARRGGBB -> mm0 */ |
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312 pand_r2r(mm3, mm0); /* 0A0R0G0B -> mm0(src1) */ |
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313 punpckhbw_r2r(mm1, mm1); /* high - AARRGGBB -> mm1 */ |
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314 pand_r2r(mm3, mm1); /* 0A0R0G0B -> mm1(src2) */ |
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315 |
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316 movq_m2r((*dstp), mm2);/* 2 x dst -> mm2(ARGBARGB) */ |
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317 movq_r2r(mm2, mm5); /* 2 x dst -> mm5(ARGBARGB) */ |
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318 movq_r2r(mm2, mm6); /* 2 x dst -> mm6(ARGBARGB) */ |
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319 punpcklbw_r2r(mm2, mm2); /* low - AARRGGBB -> mm2 */ |
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320 punpckhbw_r2r(mm6, mm6); /* high - AARRGGBB -> mm6 */ |
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321 pand_r2r(mm3, mm2); /* 0A0R0G0B -> mm2(dst1) */ |
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322 |
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323 psubw_r2r(mm2, mm0);/* src1 - dst1 -> mm0 */ |
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324 pmullw_r2r(mm4, mm0); /* mm0 * alpha -> mm0 */ |
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325 pand_r2r(mm3, mm6); /* 0A0R0G0B -> mm6(dst2) */ |
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326 psrlw_i2r(8, mm0); /* mm0 >> 8 -> mm1 */ |
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327 psubw_r2r(mm6, mm1);/* src2 - dst2 -> mm1 */ |
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328 pmullw_r2r(mm4, mm1); /* mm1 * alpha -> mm1 */ |
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329 paddw_r2r(mm0, mm2); /* mm0 + mm2(dst1) -> mm2 */ |
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330 psrlw_i2r(8, mm1); /* mm1 >> 8 -> mm0 */ |
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331 pand_r2r(mm3, mm2); /* 0A0R0G0B -> mm2 */ |
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332 paddw_r2r(mm1, mm6); /* mm1 + mm6(dst2) -> mm6 */ |
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333 pand_r2r(mm3, mm6); /* 0A0R0G0B -> mm6 */ |
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334 packuswb_r2r(mm2, mm2); /* ARGBARGB -> mm2 */ |
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335 packuswb_r2r(mm6, mm6); /* ARGBARGB -> mm6 */ |
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336 psrlq_i2r(32, mm2); /* mm2 >> 32 -> mm2 */ |
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337 psllq_i2r(32, mm6); /* mm6 << 32 -> mm6 */ |
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338 por_r2r(mm6, mm2); /* mm6 | mm2 -> mm2 */ |
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339 por_r2r(mm7, mm2); /* mm7(full alpha) | mm2 -> mm2 */ |
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340 movq_r2m(mm2, *dstp);/* mm2 -> 2 x pixel */ |
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341 srcp += 2; |
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342 dstp += 2; |
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343 }, width); |
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344 srcp += srcskip; |
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345 dstp += dstskip; |
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346 } |
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347 emms(); |
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348 } |
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349 } |
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350 |
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351 /* fast ARGB888->(A)RGB888 blending with pixel alpha */ |
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352 static void BlitRGBtoRGBPixelAlphaMMX(SDL_BlitInfo *info) |
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353 { |
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354 int width = info->d_width; |
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355 int height = info->d_height; |
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356 Uint32 *srcp = (Uint32 *)info->s_pixels; |
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357 int srcskip = info->s_skip >> 2; |
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358 Uint32 *dstp = (Uint32 *)info->d_pixels; |
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359 int dstskip = info->d_skip >> 2; |
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360 Uint32 alpha = 0; |
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361 Uint8 load[8]; |
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362 |
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363 *(Uint64 *)load = 0x00FF00FF00FF00FF; |
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364 movq_m2r(*load, mm3); /* mask -> mm2 */ |
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365 *(Uint64 *)load = 0x00FF000000000000; |
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366 movq_m2r(*load, mm7); /* dst alpha mask -> mm2 */ |
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367 *(Uint64 *)load = 0x00FFFFFF00FFFFFF; |
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368 movq_m2r(*load, mm0); /* alpha 255 mask -> mm0 */ |
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369 *(Uint64 *)load = 0xFF000000FF000000; |
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370 movq_m2r(*load, mm6); /* alpha 255 !mask -> mm6 */ |
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371 while(height--) { |
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372 DUFFS_LOOP4({ |
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373 alpha = *srcp; |
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374 alpha >>= 24; |
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375 /* FIXME: Here we special-case opaque alpha since the |
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376 compositioning used (>>8 instead of /255) doesn't handle |
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377 it correctly. Also special-case alpha=0 for speed? |
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378 Benchmark this! */ |
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379 if(alpha) { |
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380 if(alpha == SDL_ALPHA_OPAQUE) { |
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381 movd_m2r((*srcp), mm1);/* src(ARGB) -> mm1 (0000ARGB)*/ |
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382 movd_m2r((*dstp), mm2);/* dst(ARGB) -> mm2 (0000ARGB)*/ |
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383 pand_r2r(mm0, mm1); |
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384 pand_r2r(mm6, mm2); |
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385 por_r2r(mm1, mm2); |
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386 movd_r2m(mm2, (*dstp)); |
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387 } else { |
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388 movd_m2r((*srcp), mm1);/* src(ARGB) -> mm1 (0000ARGB)*/ |
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389 punpcklbw_r2r(mm1, mm1); /* AARRGGBB -> mm1 */ |
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390 pand_r2r(mm3, mm1); /* 0A0R0G0B -> mm1 */ |
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391 |
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392 movd_m2r((*dstp), mm2);/* dst(ARGB) -> mm2 (0000ARGB)*/ |
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393 punpcklbw_r2r(mm2, mm2); /* AARRGGBB -> mm2 */ |
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394 pand_r2r(mm3, mm2); /* 0A0R0G0B -> mm2 */ |
|
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395 |
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396 movq_r2r(mm2, mm5);/* mm2(0A0R0G0B) -> mm5 */ |
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397 pand_r2r(mm7, mm5); /* mm5 & dst alpha mask -> mm5(0A000000) */ |
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398 psrlq_i2r(24, mm5); /* mm5 >> 24 -> mm5 (0000A000)*/ |
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399 |
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400 movq_r2r(mm1, mm4);/* mm1(0A0R0G0B) -> mm4 */ |
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401 psrlq_i2r(48, mm4); /* mm4 >> 48 -> mm4(0000000A) */ |
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402 punpcklwd_r2r(mm4, mm4); /* 00000A0A -> mm4 */ |
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403 punpcklwd_r2r(mm4, mm4); /* 0A0A0A0A -> mm4 */ |
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404 |
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405 /* blend */ |
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406 psubw_r2r(mm2, mm1);/* src - dst -> mm1 */ |
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407 pmullw_r2r(mm4, mm1); /* mm1 * alpha -> mm1 */ |
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408 psrlw_i2r(8, mm1); /* mm1 >> 8 -> mm1 */ |
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409 paddw_r2r(mm1, mm2); /* mm1 + mm2(dst) -> mm2 */ |
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410 pand_r2r(mm3, mm2); /* 0A0R0G0B -> mm2 */ |
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411 packuswb_r2r(mm2, mm2); /* ARGBARGB -> mm2 */ |
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412 pand_r2r(mm0, mm2); /* 0RGB0RGB -> mm2 */ |
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413 por_r2r(mm5, mm2); /* dst alpha | mm2 -> mm2 */ |
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414 movd_r2m(mm2, *dstp);/* mm2 -> dst */ |
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415 } |
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416 } |
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417 ++srcp; |
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418 ++dstp; |
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419 }, width); |
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420 srcp += srcskip; |
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421 dstp += dstskip; |
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422 } |
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423 emms(); |
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424 } |
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425 #endif |
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426 |
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427 /* fast RGB888->(A)RGB888 blending with surface alpha=128 special case */ |
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428 static void BlitRGBtoRGBSurfaceAlpha128(SDL_BlitInfo *info) |
| 0 | 429 { |
| 430 int width = info->d_width; | |
| 431 int height = info->d_height; | |
| 432 Uint32 *srcp = (Uint32 *)info->s_pixels; | |
| 433 int srcskip = info->s_skip >> 2; | |
| 434 Uint32 *dstp = (Uint32 *)info->d_pixels; | |
| 435 int dstskip = info->d_skip >> 2; | |
| 436 | |
| 437 while(height--) { | |
| 438 DUFFS_LOOP4({ | |
|
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439 Uint32 s = *srcp++; |
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440 Uint32 d = *dstp; |
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441 *dstp++ = ((((s & 0x00fefefe) + (d & 0x00fefefe)) >> 1) |
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442 + (s & d & 0x00010101)) | 0xff000000; |
| 0 | 443 }, width); |
| 444 srcp += srcskip; | |
| 445 dstp += dstskip; | |
| 446 } | |
| 447 } | |
| 448 | |
|
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449 /* fast RGB888->(A)RGB888 blending with surface alpha */ |
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450 static void BlitRGBtoRGBSurfaceAlpha(SDL_BlitInfo *info) |
|
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451 { |
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452 unsigned alpha = info->src->alpha; |
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453 if(alpha == 128) { |
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454 BlitRGBtoRGBSurfaceAlpha128(info); |
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455 } else { |
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456 int width = info->d_width; |
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457 int height = info->d_height; |
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458 Uint32 *srcp = (Uint32 *)info->s_pixels; |
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459 int srcskip = info->s_skip >> 2; |
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460 Uint32 *dstp = (Uint32 *)info->d_pixels; |
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461 int dstskip = info->d_skip >> 2; |
|
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462 Uint32 s; |
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463 Uint32 d; |
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464 Uint32 s1; |
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465 Uint32 d1; |
|
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466 |
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467 while(height--) { |
|
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468 DUFFS_LOOP_DOUBLE2({ |
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469 /* One Pixel Blend */ |
|
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470 s = *srcp; |
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471 d = *dstp; |
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472 s1 = s & 0xff00ff; |
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473 d1 = d & 0xff00ff; |
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474 d1 = (d1 + ((s1 - d1) * alpha >> 8)) |
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475 & 0xff00ff; |
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476 s &= 0xff00; |
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477 d &= 0xff00; |
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478 d = (d + ((s - d) * alpha >> 8)) & 0xff00; |
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479 *dstp = d1 | d | 0xff000000; |
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480 ++srcp; |
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481 ++dstp; |
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482 },{ |
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483 /* Two Pixels Blend */ |
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484 s = *srcp; |
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485 d = *dstp; |
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486 s1 = s & 0xff00ff; |
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487 d1 = d & 0xff00ff; |
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488 d1 += (s1 - d1) * alpha >> 8; |
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489 d1 &= 0xff00ff; |
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490 |
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491 s = ((s & 0xff00) >> 8) | |
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492 ((srcp[1] & 0xff00) << 8); |
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493 d = ((d & 0xff00) >> 8) | |
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494 ((dstp[1] & 0xff00) << 8); |
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495 d += (s - d) * alpha >> 8; |
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496 d &= 0x00ff00ff; |
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497 |
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498 *dstp++ = d1 | ((d << 8) & 0xff00) | 0xff000000; |
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499 ++srcp; |
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500 |
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501 s1 = *srcp; |
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502 d1 = *dstp; |
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503 s1 &= 0xff00ff; |
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504 d1 &= 0xff00ff; |
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505 d1 += (s1 - d1) * alpha >> 8; |
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506 d1 &= 0xff00ff; |
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507 |
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508 *dstp = d1 | ((d >> 8) & 0xff00) | 0xff000000; |
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509 ++srcp; |
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510 ++dstp; |
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511 }, width); |
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512 srcp += srcskip; |
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513 dstp += dstskip; |
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514 } |
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515 } |
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516 } |
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517 |
| 0 | 518 /* fast ARGB888->(A)RGB888 blending with pixel alpha */ |
| 519 static void BlitRGBtoRGBPixelAlpha(SDL_BlitInfo *info) | |
| 520 { | |
| 521 int width = info->d_width; | |
| 522 int height = info->d_height; | |
| 523 Uint32 *srcp = (Uint32 *)info->s_pixels; | |
| 524 int srcskip = info->s_skip >> 2; | |
| 525 Uint32 *dstp = (Uint32 *)info->d_pixels; | |
| 526 int dstskip = info->d_skip >> 2; | |
| 527 | |
| 528 while(height--) { | |
| 529 DUFFS_LOOP4({ | |
| 530 Uint32 dalpha; | |
| 531 Uint32 d; | |
| 532 Uint32 s1; | |
| 533 Uint32 d1; | |
| 534 Uint32 s = *srcp; | |
| 535 Uint32 alpha = s >> 24; | |
| 536 /* FIXME: Here we special-case opaque alpha since the | |
| 537 compositioning used (>>8 instead of /255) doesn't handle | |
| 538 it correctly. Also special-case alpha=0 for speed? | |
| 539 Benchmark this! */ | |
|
689
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540 if(alpha) { |
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541 if(alpha == SDL_ALPHA_OPAQUE) { |
| 0 | 542 *dstp = (s & 0x00ffffff) | (*dstp & 0xff000000); |
|
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543 } else { |
| 0 | 544 /* |
| 545 * take out the middle component (green), and process | |
| 546 * the other two in parallel. One multiply less. | |
| 547 */ | |
| 548 d = *dstp; | |
| 549 dalpha = d & 0xff000000; | |
| 550 s1 = s & 0xff00ff; | |
| 551 d1 = d & 0xff00ff; | |
| 552 d1 = (d1 + ((s1 - d1) * alpha >> 8)) & 0xff00ff; | |
| 553 s &= 0xff00; | |
| 554 d &= 0xff00; | |
| 555 d = (d + ((s - d) * alpha >> 8)) & 0xff00; | |
| 556 *dstp = d1 | d | dalpha; | |
|
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557 } |
| 0 | 558 } |
| 559 ++srcp; | |
| 560 ++dstp; | |
| 561 }, width); | |
| 562 srcp += srcskip; | |
| 563 dstp += dstskip; | |
| 564 } | |
| 565 } | |
| 566 | |
|
689
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567 #if defined(i386) && defined(__GNUC__) && defined(USE_ASMBLIT) |
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568 /* fast (as in MMX with prefetch) ARGB888->(A)RGB888 blending with pixel alpha */ |
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569 inline static void BlitRGBtoRGBPixelAlphaMMX3DNOW(SDL_BlitInfo *info) |
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570 { |
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571 int width = info->d_width; |
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572 int height = info->d_height; |
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573 Uint32 *srcp = (Uint32 *)info->s_pixels; |
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574 int srcskip = info->s_skip >> 2; |
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575 Uint32 *dstp = (Uint32 *)info->d_pixels; |
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576 int dstskip = info->d_skip >> 2; |
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577 |
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578 Uint32 s; |
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579 Uint32 alpha; |
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580 |
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581 __asm__ ( |
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582 /* make mm6 all zeros. */ |
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583 "pxor %%mm6, %%mm6\n" |
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584 |
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585 /* Make a mask to preserve the alpha. */ |
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586 "pcmpeqb %%mm7, %%mm7\n\t" /* mm7(s) = FF FF FF FF | FF FF FF FF */ |
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587 "psrlq $16, %%mm7\n\t" /* mm7(s) = 00 00 FF FF | FF FF FF FF */ |
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588 |
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589 : ); |
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590 |
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591 while(height--) { |
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592 |
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593 DUFFS_LOOP4({ |
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594 |
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595 __asm__ ( |
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596 "prefetch 64(%0)\n" |
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597 "prefetch 64(%1)\n" |
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598 : : "r" (srcp), "r" (dstp) ); |
|
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599 |
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600 s = *srcp; |
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601 alpha = s >> 24; |
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602 /* FIXME: Here we special-case opaque alpha since the |
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603 compositioning used (>>8 instead of /255) doesn't handle |
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604 it correctly. Also special-case alpha=0 for speed? |
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605 Benchmark this! */ |
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606 |
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607 if(alpha == SDL_ALPHA_OPAQUE) { |
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608 *dstp = (s & 0x00ffffff) | (*dstp & 0xff000000); |
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609 } |
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610 |
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611 else { |
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612 __asm__ ( |
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613 /* load in the source, and dst. */ |
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614 "movd (%0), %%mm0\n" /* mm0(s) = 0 0 0 0 | As Rs Gs Bs */ |
|
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615 "movd (%1), %%mm1\n" /* mm1(d) = 0 0 0 0 | Ad Rd Gd Bd */ |
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616 |
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617 /* Move the src alpha into mm2 */ |
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618 |
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619 /* if supporting pshufw */ |
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620 /*"pshufw $0x55, %%mm0, %%mm2\n" */ /* mm2 = 0 As 0 As | 0 As 0 As */ |
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621 /*"psrlw $8, %%mm2\n" */ |
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622 |
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623 /* else: */ |
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624 "movq %%mm0, %%mm2\n" |
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625 "psrld $24, %%mm2\n" /* mm2 = 0 0 0 0 | 0 0 0 As */ |
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626 "punpcklwd %%mm2, %%mm2\n" /* mm2 = 0 0 0 0 | 0 As 0 As */ |
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627 "punpckldq %%mm2, %%mm2\n" /* mm2 = 0 As 0 As | 0 As 0 As */ |
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628 |
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629 /* move the colors into words. */ |
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630 "punpcklbw %%mm6, %%mm0\n" /* mm0 = 0 As 0 Rs | 0 Gs 0 Bs */ |
|
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631 "punpcklbw %%mm6, %%mm1\n" /* mm0 = 0 Ad 0 Rd | 0 Gd 0 Bd */ |
|
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632 |
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633 /* src - dst */ |
|
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634 "psubw %%mm1, %%mm0\n" /* mm0 = As-Ad Rs-Rd | Gs-Gd Bs-Bd */ |
|
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635 |
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636 /* A * (src-dst) */ |
|
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637 "pmullw %%mm2, %%mm0\n" /* mm0 = As*As-d As*Rs-d | As*Gs-d As*Bs-d */ |
|
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638 "pand %%mm7, %%mm0\n" /* to preserve dest alpha */ |
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639 "psrlw $8, %%mm0\n" /* mm0 = Ac>>8 Rc>>8 | Gc>>8 Bc>>8 */ |
|
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640 "paddb %%mm1, %%mm0\n" /* mm0 = Ac+Ad Rc+Rd | Gc+Gd Bc+Bd */ |
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641 |
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642 "packuswb %%mm0, %%mm0\n" /* mm0 = | Ac Rc Gc Bc */ |
|
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643 |
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644 "movd %%mm0, (%1)\n" /* result in mm0 */ |
|
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645 |
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646 : : "r" (srcp), "r" (dstp) ); |
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647 |
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648 } |
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649 ++srcp; |
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650 ++dstp; |
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651 }, width); |
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652 srcp += srcskip; |
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653 dstp += dstskip; |
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654 } |
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655 |
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656 __asm__ ( |
|
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657 "emms\n" |
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658 : ); |
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659 } |
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660 #endif |
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661 |
|
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662 /* 16bpp special case for per-surface alpha=50%: blend 2 pixels in parallel */ |
|
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663 |
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|
664 /* blend a single 16 bit pixel at 50% */ |
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665 #define BLEND16_50(d, s, mask) \ |
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666 ((((s & mask) + (d & mask)) >> 1) + (s & d & (~mask & 0xffff))) |
|
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667 |
|
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|
668 /* blend two 16 bit pixels at 50% */ |
|
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669 #define BLEND2x16_50(d, s, mask) \ |
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670 (((s & (mask | mask << 16)) >> 1) + ((d & (mask | mask << 16)) >> 1) \ |
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671 + (s & d & (~(mask | mask << 16)))) |
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|
672 |
|
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673 static void Blit16to16SurfaceAlpha128(SDL_BlitInfo *info, Uint16 mask) |
| 0 | 674 { |
| 675 int width = info->d_width; | |
| 676 int height = info->d_height; | |
| 677 Uint16 *srcp = (Uint16 *)info->s_pixels; | |
| 678 int srcskip = info->s_skip >> 1; | |
| 679 Uint16 *dstp = (Uint16 *)info->d_pixels; | |
| 680 int dstskip = info->d_skip >> 1; | |
| 681 | |
| 682 while(height--) { | |
|
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683 if(((unsigned long)srcp ^ (unsigned long)dstp) & 2) { |
|
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684 /* |
|
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685 * Source and destination not aligned, pipeline it. |
|
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686 * This is mostly a win for big blits but no loss for |
|
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687 * small ones |
|
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688 */ |
|
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|
689 Uint32 prev_sw; |
|
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690 int w = width; |
|
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|
691 |
|
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|
692 /* handle odd destination */ |
|
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|
693 if((unsigned long)dstp & 2) { |
|
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694 Uint16 d = *dstp, s = *srcp; |
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|
695 *dstp = BLEND16_50(d, s, mask); |
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696 dstp++; |
|
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697 srcp++; |
|
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698 w--; |
|
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|
699 } |
|
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|
700 srcp++; /* srcp is now 32-bit aligned */ |
|
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|
701 |
|
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|
702 /* bootstrap pipeline with first halfword */ |
|
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703 prev_sw = ((Uint32 *)srcp)[-1]; |
|
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|
704 |
|
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|
705 while(w > 1) { |
|
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|
706 Uint32 sw, dw, s; |
|
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|
707 sw = *(Uint32 *)srcp; |
|
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|
708 dw = *(Uint32 *)dstp; |
|
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|
709 if(SDL_BYTEORDER == SDL_BIG_ENDIAN) |
|
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|
710 s = (prev_sw << 16) + (sw >> 16); |
|
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|
711 else |
|
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|
712 s = (prev_sw >> 16) + (sw << 16); |
|
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|
713 prev_sw = sw; |
|
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|
714 *(Uint32 *)dstp = BLEND2x16_50(dw, s, mask); |
|
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|
715 dstp += 2; |
|
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|
716 srcp += 2; |
|
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|
717 w -= 2; |
|
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|
718 } |
|
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|
719 |
|
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|
720 /* final pixel if any */ |
|
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|
721 if(w) { |
|
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|
722 Uint16 d = *dstp, s; |
|
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|
723 if(SDL_BYTEORDER == SDL_BIG_ENDIAN) |
|
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|
724 s = prev_sw; |
|
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|
725 else |
|
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|
726 s = prev_sw >> 16; |
|
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|
727 *dstp = BLEND16_50(d, s, mask); |
|
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|
728 srcp++; |
|
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|
729 dstp++; |
|
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|
730 } |
|
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|
731 srcp += srcskip - 1; |
|
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|
732 dstp += dstskip; |
|
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|
733 } else { |
|
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|
734 /* source and destination are aligned */ |
|
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|
735 int w = width; |
|
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|
736 |
|
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|
737 /* first odd pixel? */ |
|
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|
738 if((unsigned long)srcp & 2) { |
|
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|
739 Uint16 d = *dstp, s = *srcp; |
|
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|
740 *dstp = BLEND16_50(d, s, mask); |
|
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|
741 srcp++; |
|
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|
742 dstp++; |
|
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|
743 w--; |
|
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|
744 } |
|
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|
745 /* srcp and dstp are now 32-bit aligned */ |
|
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|
746 |
|
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|
747 while(w > 1) { |
|
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|
748 Uint32 sw = *(Uint32 *)srcp; |
|
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|
749 Uint32 dw = *(Uint32 *)dstp; |
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750 *(Uint32 *)dstp = BLEND2x16_50(dw, sw, mask); |
|
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|
751 srcp += 2; |
|
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|
752 dstp += 2; |
|
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|
753 w -= 2; |
|
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|
754 } |
|
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|
755 |
|
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|
756 /* last odd pixel? */ |
|
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|
757 if(w) { |
|
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|
758 Uint16 d = *dstp, s = *srcp; |
|
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|
759 *dstp = BLEND16_50(d, s, mask); |
|
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|
760 srcp++; |
|
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|
761 dstp++; |
|
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|
762 } |
|
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|
763 srcp += srcskip; |
|
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|
764 dstp += dstskip; |
|
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|
765 } |
|
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|
766 } |
|
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|
767 } |
|
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|
768 |
|
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769 #if defined(i386) && defined(__GNUC__) && defined(USE_ASMBLIT) |
|
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770 /* fast RGB565->RGB565 blending with surface alpha */ |
|
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771 static void Blit565to565SurfaceAlphaMMX(SDL_BlitInfo *info) |
|
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772 { |
|
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773 unsigned alpha = info->src->alpha; /* downscale alpha to 5 bits */ |
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774 if(alpha == 128) { |
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775 Blit16to16SurfaceAlpha128(info, 0xf7de); |
|
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776 } else { |
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777 int width = info->d_width; |
|
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778 int height = info->d_height; |
|
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779 Uint16 *srcp = (Uint16 *)info->s_pixels; |
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780 int srcskip = info->s_skip >> 1; |
|
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781 Uint16 *dstp = (Uint16 *)info->d_pixels; |
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782 int dstskip = info->d_skip >> 1; |
|
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783 Uint32 s, d; |
|
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784 Uint8 load[8]; |
|
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785 |
|
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786 alpha &= ~(1+2+4); /* cut alpha to get the exact same behaviour */ |
|
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787 *(Uint64 *)load = alpha; |
|
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788 alpha >>= 3; /* downscale alpha to 5 bits */ |
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789 |
|
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790 movq_m2r(*load, mm0); /* alpha(0000000A) -> mm0 */ |
|
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791 punpcklwd_r2r(mm0, mm0); /* 00000A0A -> mm0 */ |
|
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792 punpcklwd_r2r(mm0, mm0); /* 0A0A0A0A -> mm0 */ |
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793 |
|
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794 /* Setup the 565 color channel masks */ |
|
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795 *(Uint64 *)load = 0xF800F800F800F800; |
|
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796 movq_m2r(*load, mm1); /* MASKRED -> mm1 */ |
|
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797 *(Uint64 *)load = 0x07E007E007E007E0; |
|
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798 movq_m2r(*load, mm4); /* MASKGREEN -> mm4 */ |
|
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799 *(Uint64 *)load = 0x001F001F001F001F; |
|
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800 movq_m2r(*load, mm7); /* MASKBLUE -> mm7 */ |
|
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801 while(height--) { |
|
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802 DUFFS_LOOP_QUATRO2( |
|
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803 { |
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804 s = *srcp++; |
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805 d = *dstp; |
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806 /* |
|
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807 * shift out the middle component (green) to |
|
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|
808 * the high 16 bits, and process all three RGB |
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809 * components at the same time. |
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810 */ |
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811 s = (s | s << 16) & 0x07e0f81f; |
|
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812 d = (d | d << 16) & 0x07e0f81f; |
|
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813 d += (s - d) * alpha >> 5; |
|
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814 d &= 0x07e0f81f; |
|
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815 *dstp++ = d | d >> 16; |
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816 },{ |
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817 s = *srcp++; |
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818 d = *dstp; |
|
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819 /* |
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820 * shift out the middle component (green) to |
|
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821 * the high 16 bits, and process all three RGB |
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822 * components at the same time. |
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823 */ |
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824 s = (s | s << 16) & 0x07e0f81f; |
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825 d = (d | d << 16) & 0x07e0f81f; |
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826 d += (s - d) * alpha >> 5; |
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827 d &= 0x07e0f81f; |
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828 *dstp++ = d | d >> 16; |
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829 s = *srcp++; |
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830 d = *dstp; |
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831 /* |
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832 * shift out the middle component (green) to |
|
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833 * the high 16 bits, and process all three RGB |
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834 * components at the same time. |
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835 */ |
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836 s = (s | s << 16) & 0x07e0f81f; |
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837 d = (d | d << 16) & 0x07e0f81f; |
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838 d += (s - d) * alpha >> 5; |
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839 d &= 0x07e0f81f; |
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840 *dstp++ = d | d >> 16; |
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841 },{ |
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842 movq_m2r((*dstp), mm3);/* 4 dst pixels -> mm3 */ |
|
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843 movq_m2r((*srcp), mm2);/* 4 src pixels -> mm2 */ |
|
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844 |
|
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845 /* RED */ |
|
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846 movq_r2r(mm2, mm5); /* src -> mm5 */ |
|
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|
847 pand_r2r(mm1 , mm5); /* src & MASKRED -> mm5 */ |
|
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|
848 psrlq_i2r(11, mm5); /* mm5 >> 11 -> mm5 [000r 000r 000r 000r] */ |
|
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849 |
|
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850 movq_r2r(mm3, mm6); /* dst -> mm6 */ |
|
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851 pand_r2r(mm1 , mm6); /* dst & MASKRED -> mm6 */ |
|
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852 psrlq_i2r(11, mm6); /* mm6 >> 11 -> mm6 [000r 000r 000r 000r] */ |
|
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853 |
|
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|
854 /* blend */ |
|
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|
855 psubw_r2r(mm6, mm5);/* src - dst -> mm5 */ |
|
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856 pmullw_r2r(mm0, mm5); /* mm5 * alpha -> mm5 */ |
|
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|
857 psrlw_i2r(8, mm5); /* mm5 >> 8 -> mm5 */ |
|
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858 paddw_r2r(mm5, mm6); /* mm5 + mm6(dst) -> mm6 */ |
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859 psllq_i2r(11, mm6); /* mm6 << 11 -> mm6 */ |
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860 pand_r2r(mm1, mm6); /* mm6 & MASKRED -> mm6 */ |
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861 |
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862 movq_r2r(mm4, mm5); /* MASKGREEN -> mm5 */ |
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863 por_r2r(mm7, mm5); /* MASKBLUE | mm5 -> mm5 */ |
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864 pand_r2r(mm5, mm3); /* mm3 & mm5(!MASKRED) -> mm3 */ |
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865 por_r2r(mm6, mm3); /* save new reds in dsts */ |
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866 |
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867 /* green */ |
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868 movq_r2r(mm2, mm5); /* src -> mm5 */ |
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869 pand_r2r(mm4 , mm5); /* src & MASKGREEN -> mm5 */ |
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870 psrlq_i2r(5, mm5); /* mm5 >> 5 -> mm5 [000g 000g 000g 000g] */ |
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871 |
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872 movq_r2r(mm3, mm6); /* dst -> mm6 */ |
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873 pand_r2r(mm4 , mm6); /* dst & MASKGREEN -> mm6 */ |
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874 psrlq_i2r(5, mm6); /* mm6 >> 5 -> mm6 [000g 000g 000g 000g] */ |
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875 |
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876 /* blend */ |
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877 psubw_r2r(mm6, mm5);/* src - dst -> mm5 */ |
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878 pmullw_r2r(mm0, mm5); /* mm5 * alpha -> mm5 */ |
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879 psrlw_i2r(8, mm5); /* mm5 >> 8 -> mm5 */ |
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880 paddw_r2r(mm5, mm6); /* mm5 + mm6(dst) -> mm6 */ |
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881 psllq_i2r(5, mm6); /* mm6 << 5 -> mm6 */ |
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882 pand_r2r(mm4, mm6); /* mm6 & MASKGREEN -> mm6 */ |
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883 |
|
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884 movq_r2r(mm1, mm5); /* MASKRED -> mm5 */ |
|
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885 por_r2r(mm7, mm5); /* MASKBLUE | mm5 -> mm5 */ |
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886 pand_r2r(mm5, mm3); /* mm3 & mm5(!MASKGREEN) -> mm3 */ |
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887 por_r2r(mm6, mm3); /* save new greens in dsts */ |
|
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888 |
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889 /* blue */ |
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890 movq_r2r(mm2, mm5); /* src -> mm5 */ |
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891 pand_r2r(mm7 , mm5); /* src & MASKRED -> mm5[000b 000b 000b 000b] */ |
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892 |
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893 movq_r2r(mm3, mm6); /* dst -> mm6 */ |
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894 pand_r2r(mm7 , mm6); /* dst & MASKBLUE -> mm6[000b 000b 000b 000b] */ |
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895 |
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896 /* blend */ |
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897 psubw_r2r(mm6, mm5);/* src - dst -> mm5 */ |
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898 pmullw_r2r(mm0, mm5); /* mm5 * alpha -> mm5 */ |
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899 psrlw_i2r(8, mm5); /* mm5 >> 8 -> mm5 */ |
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900 paddw_r2r(mm5, mm6); /* mm5 + mm6(dst) -> mm6 */ |
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901 pand_r2r(mm7, mm6); /* mm6 & MASKBLUE -> mm6 */ |
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902 |
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903 movq_r2r(mm1, mm5); /* MASKRED -> mm5 */ |
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904 por_r2r(mm4, mm5); /* MASKGREEN | mm5 -> mm5 */ |
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905 pand_r2r(mm5, mm3); /* mm3 & mm5(!MASKBLUE) -> mm3 */ |
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906 por_r2r(mm6, mm3); /* save new blues in dsts */ |
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907 |
|
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908 movq_r2m(mm3, *dstp);/* mm3 -> 4 dst pixels */ |
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909 |
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910 srcp += 4; |
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911 dstp += 4; |
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912 }, width); |
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913 srcp += srcskip; |
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914 dstp += dstskip; |
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915 } |
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916 emms(); |
|
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917 } |
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918 } |
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919 |
|
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920 /* fast RGB555->RGB555 blending with surface alpha */ |
|
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921 static void Blit555to555SurfaceAlphaMMX(SDL_BlitInfo *info) |
|
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922 { |
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923 unsigned alpha = info->src->alpha; /* downscale alpha to 5 bits */ |
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924 if(alpha == 128) { |
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925 Blit16to16SurfaceAlpha128(info, 0xfbde); |
|
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926 } else { |
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927 int width = info->d_width; |
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928 int height = info->d_height; |
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929 Uint16 *srcp = (Uint16 *)info->s_pixels; |
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930 int srcskip = info->s_skip >> 1; |
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931 Uint16 *dstp = (Uint16 *)info->d_pixels; |
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932 int dstskip = info->d_skip >> 1; |
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933 Uint32 s, d; |
|
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934 Uint8 load[8]; |
|
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935 |
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936 alpha &= ~(1+2+4); /* cut alpha to get the exact same behaviour */ |
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937 *(Uint64 *)load = alpha; |
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938 alpha >>= 3; /* downscale alpha to 5 bits */ |
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939 |
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940 movq_m2r(*load, mm0); /* alpha(0000000A) -> mm0 */ |
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941 punpcklwd_r2r(mm0, mm0); /* 00000A0A -> mm0 */ |
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942 punpcklwd_r2r(mm0, mm0); /* 0A0A0A0A -> mm0 */ |
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943 |
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944 /* Setup the 555 color channel masks */ |
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945 *(Uint64 *)load = 0x7C007C007C007C00; |
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946 movq_m2r(*load, mm1); /* MASKRED -> mm1 */ |
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947 *(Uint64 *)load = 0x03E003E003E003E0; |
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948 movq_m2r(*load, mm4); /* MASKGREEN -> mm4 */ |
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949 *(Uint64 *)load = 0x001F001F001F001F; |
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950 movq_m2r(*load, mm7); /* MASKBLUE -> mm7 */ |
|
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951 while(height--) { |
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952 DUFFS_LOOP_QUATRO2( |
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953 { |
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954 s = *srcp++; |
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955 d = *dstp; |
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956 /* |
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957 * shift out the middle component (green) to |
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958 * the high 16 bits, and process all three RGB |
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959 * components at the same time. |
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960 */ |
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961 s = (s | s << 16) & 0x03e07c1f; |
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962 d = (d | d << 16) & 0x03e07c1f; |
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963 d += (s - d) * alpha >> 5; |
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964 d &= 0x03e07c1f; |
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965 *dstp++ = d | d >> 16; |
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966 },{ |
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967 s = *srcp++; |
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968 d = *dstp; |
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969 /* |
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970 * shift out the middle component (green) to |
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971 * the high 16 bits, and process all three RGB |
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972 * components at the same time. |
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973 */ |
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974 s = (s | s << 16) & 0x03e07c1f; |
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975 d = (d | d << 16) & 0x03e07c1f; |
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976 d += (s - d) * alpha >> 5; |
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977 d &= 0x03e07c1f; |
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978 *dstp++ = d | d >> 16; |
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979 s = *srcp++; |
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980 d = *dstp; |
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981 /* |
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982 * shift out the middle component (green) to |
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983 * the high 16 bits, and process all three RGB |
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984 * components at the same time. |
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985 */ |
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986 s = (s | s << 16) & 0x03e07c1f; |
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987 d = (d | d << 16) & 0x03e07c1f; |
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988 d += (s - d) * alpha >> 5; |
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989 d &= 0x03e07c1f; |
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990 *dstp++ = d | d >> 16; |
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991 },{ |
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992 movq_m2r((*dstp), mm3);/* 4 dst pixels -> mm3 */ |
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993 movq_m2r((*srcp), mm2);/* 4 src pixels -> mm2 */ |
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994 |
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995 /* RED */ |
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996 movq_r2r(mm2, mm5); /* src -> mm5 */ |
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997 pand_r2r(mm1 , mm5); /* src & MASKRED -> mm5 */ |
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998 psrlq_i2r(10, mm5); /* mm5 >> 10 -> mm5 [000r 000r 000r 000r] */ |
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999 |
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1000 movq_r2r(mm3, mm6); /* dst -> mm6 */ |
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1001 pand_r2r(mm1 , mm6); /* dst & MASKRED -> mm6 */ |
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1002 psrlq_i2r(10, mm6); /* mm6 >> 10 -> mm6 [000r 000r 000r 000r] */ |
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1003 |
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1004 /* blend */ |
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1005 psubw_r2r(mm6, mm5);/* src - dst -> mm5 */ |
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1006 pmullw_r2r(mm0, mm5); /* mm5 * alpha -> mm5 */ |
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1007 psrlw_i2r(8, mm5); /* mm5 >> 8 -> mm5 */ |
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1008 paddw_r2r(mm5, mm6); /* mm5 + mm6(dst) -> mm6 */ |
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1009 psllq_i2r(10, mm6); /* mm6 << 10 -> mm6 */ |
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1010 pand_r2r(mm1, mm6); /* mm6 & MASKRED -> mm6 */ |
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1011 |
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1012 movq_r2r(mm4, mm5); /* MASKGREEN -> mm5 */ |
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1013 por_r2r(mm7, mm5); /* MASKBLUE | mm5 -> mm5 */ |
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1014 pand_r2r(mm5, mm3); /* mm3 & mm5(!MASKRED) -> mm3 */ |
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1015 por_r2r(mm6, mm3); /* save new reds in dsts */ |
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1016 |
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1017 /* green */ |
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1018 movq_r2r(mm2, mm5); /* src -> mm5 */ |
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1019 pand_r2r(mm4 , mm5); /* src & MASKGREEN -> mm5 */ |
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1020 psrlq_i2r(5, mm5); /* mm5 >> 5 -> mm5 [000g 000g 000g 000g] */ |
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1021 |
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1022 movq_r2r(mm3, mm6); /* dst -> mm6 */ |
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1023 pand_r2r(mm4 , mm6); /* dst & MASKGREEN -> mm6 */ |
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1024 psrlq_i2r(5, mm6); /* mm6 >> 5 -> mm6 [000g 000g 000g 000g] */ |
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1025 |
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1026 /* blend */ |
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1027 psubw_r2r(mm6, mm5);/* src - dst -> mm5 */ |
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1028 pmullw_r2r(mm0, mm5); /* mm5 * alpha -> mm5 */ |
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1029 psrlw_i2r(8, mm5); /* mm5 >> 8 -> mm5 */ |
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1030 paddw_r2r(mm5, mm6); /* mm5 + mm6(dst) -> mm6 */ |
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1031 psllq_i2r(5, mm6); /* mm6 << 5 -> mm6 */ |
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1032 pand_r2r(mm4, mm6); /* mm6 & MASKGREEN -> mm6 */ |
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1033 |
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1034 movq_r2r(mm1, mm5); /* MASKRED -> mm5 */ |
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1035 por_r2r(mm7, mm5); /* MASKBLUE | mm5 -> mm5 */ |
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1036 pand_r2r(mm5, mm3); /* mm3 & mm5(!MASKGREEN) -> mm3 */ |
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1037 por_r2r(mm6, mm3); /* save new greens in dsts */ |
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1038 |
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1039 /* blue */ |
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1040 movq_r2r(mm2, mm5); /* src -> mm5 */ |
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1041 pand_r2r(mm7 , mm5); /* src & MASKRED -> mm5[000b 000b 000b 000b] */ |
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1042 |
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1043 movq_r2r(mm3, mm6); /* dst -> mm6 */ |
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1044 pand_r2r(mm7 , mm6); /* dst & MASKBLUE -> mm6[000b 000b 000b 000b] */ |
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1045 |
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1046 /* blend */ |
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1047 psubw_r2r(mm6, mm5);/* src - dst -> mm5 */ |
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1048 pmullw_r2r(mm0, mm5); /* mm5 * alpha -> mm5 */ |
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1049 psrlw_i2r(8, mm5); /* mm5 >> 8 -> mm5 */ |
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1050 paddw_r2r(mm5, mm6); /* mm5 + mm6(dst) -> mm6 */ |
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1051 pand_r2r(mm7, mm6); /* mm6 & MASKBLUE -> mm6 */ |
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1052 |
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1053 movq_r2r(mm1, mm5); /* MASKRED -> mm5 */ |
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1054 por_r2r(mm4, mm5); /* MASKGREEN | mm5 -> mm5 */ |
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1055 pand_r2r(mm5, mm3); /* mm3 & mm5(!MASKBLUE) -> mm3 */ |
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1056 por_r2r(mm6, mm3); /* save new blues in dsts */ |
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1057 |
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1058 movq_r2m(mm3, *dstp);/* mm3 -> 4 dst pixels */ |
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1059 |
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1060 srcp += 4; |
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1061 dstp += 4; |
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1062 }, width); |
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1063 srcp += srcskip; |
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1064 dstp += dstskip; |
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1065 } |
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1066 emms(); |
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1067 } |
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1068 } |
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1069 #endif |
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1070 |
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1071 /* fast RGB565->RGB565 blending with surface alpha */ |
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1072 static void Blit565to565SurfaceAlpha(SDL_BlitInfo *info) |
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1073 { |
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1074 unsigned alpha = info->src->alpha; |
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1075 if(alpha == 128) { |
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1076 Blit16to16SurfaceAlpha128(info, 0xf7de); |
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1077 } else { |
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1078 int width = info->d_width; |
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1079 int height = info->d_height; |
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1080 Uint16 *srcp = (Uint16 *)info->s_pixels; |
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1081 int srcskip = info->s_skip >> 1; |
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1082 Uint16 *dstp = (Uint16 *)info->d_pixels; |
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1083 int dstskip = info->d_skip >> 1; |
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1084 alpha >>= 3; /* downscale alpha to 5 bits */ |
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1085 |
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1086 while(height--) { |
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1087 DUFFS_LOOP4({ |
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1088 Uint32 s = *srcp++; |
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1089 Uint32 d = *dstp; |
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1090 /* |
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1091 * shift out the middle component (green) to |
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1092 * the high 16 bits, and process all three RGB |
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1093 * components at the same time. |
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1094 */ |
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1095 s = (s | s << 16) & 0x07e0f81f; |
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1096 d = (d | d << 16) & 0x07e0f81f; |
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1097 d += (s - d) * alpha >> 5; |
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1098 d &= 0x07e0f81f; |
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1099 *dstp++ = d | d >> 16; |
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1100 }, width); |
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1101 srcp += srcskip; |
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1102 dstp += dstskip; |
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1103 } |
| 0 | 1104 } |
| 1105 } | |
| 1106 | |
| 1107 /* fast RGB555->RGB555 blending with surface alpha */ | |
| 1108 static void Blit555to555SurfaceAlpha(SDL_BlitInfo *info) | |
| 1109 { | |
|
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1110 unsigned alpha = info->src->alpha; /* downscale alpha to 5 bits */ |
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1111 if(alpha == 128) { |
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1112 Blit16to16SurfaceAlpha128(info, 0xfbde); |
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1113 } else { |
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1114 int width = info->d_width; |
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1115 int height = info->d_height; |
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1116 Uint16 *srcp = (Uint16 *)info->s_pixels; |
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1117 int srcskip = info->s_skip >> 1; |
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1118 Uint16 *dstp = (Uint16 *)info->d_pixels; |
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1119 int dstskip = info->d_skip >> 1; |
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1120 alpha >>= 3; /* downscale alpha to 5 bits */ |
| 0 | 1121 |
|
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1122 while(height--) { |
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1123 DUFFS_LOOP4({ |
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1124 Uint32 s = *srcp++; |
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1125 Uint32 d = *dstp; |
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1126 /* |
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1127 * shift out the middle component (green) to |
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1128 * the high 16 bits, and process all three RGB |
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1129 * components at the same time. |
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1130 */ |
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1131 s = (s | s << 16) & 0x03e07c1f; |
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1132 d = (d | d << 16) & 0x03e07c1f; |
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1133 d += (s - d) * alpha >> 5; |
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1134 d &= 0x03e07c1f; |
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1135 *dstp++ = d | d >> 16; |
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1136 }, width); |
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1137 srcp += srcskip; |
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1138 dstp += dstskip; |
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1139 } |
| 0 | 1140 } |
| 1141 } | |
| 1142 | |
| 1143 /* fast ARGB8888->RGB565 blending with pixel alpha */ | |
| 1144 static void BlitARGBto565PixelAlpha(SDL_BlitInfo *info) | |
| 1145 { | |
| 1146 int width = info->d_width; | |
| 1147 int height = info->d_height; | |
| 1148 Uint32 *srcp = (Uint32 *)info->s_pixels; | |
| 1149 int srcskip = info->s_skip >> 2; | |
| 1150 Uint16 *dstp = (Uint16 *)info->d_pixels; | |
| 1151 int dstskip = info->d_skip >> 1; | |
| 1152 | |
| 1153 while(height--) { | |
| 1154 DUFFS_LOOP4({ | |
| 1155 Uint32 s = *srcp; | |
| 1156 unsigned alpha = s >> 27; /* downscale alpha to 5 bits */ | |
| 1157 /* FIXME: Here we special-case opaque alpha since the | |
| 1158 compositioning used (>>8 instead of /255) doesn't handle | |
| 1159 it correctly. Also special-case alpha=0 for speed? | |
| 1160 Benchmark this! */ | |
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1161 if(alpha) { |
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1162 if(alpha == (SDL_ALPHA_OPAQUE >> 3)) { |
| 0 | 1163 *dstp = (s >> 8 & 0xf800) + (s >> 5 & 0x7e0) |
| 1164 + (s >> 3 & 0x1f); | |
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1165 } else { |
| 0 | 1166 Uint32 d = *dstp; |
| 1167 /* | |
| 1168 * convert source and destination to G0RAB65565 | |
| 1169 * and blend all components at the same time | |
| 1170 */ | |
| 1171 s = ((s & 0xfc00) << 11) + (s >> 8 & 0xf800) | |
| 1172 + (s >> 3 & 0x1f); | |
| 1173 d = (d | d << 16) & 0x07e0f81f; | |
| 1174 d += (s - d) * alpha >> 5; | |
| 1175 d &= 0x07e0f81f; | |
| 1176 *dstp = d | d >> 16; | |
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1177 } |
| 0 | 1178 } |
| 1179 srcp++; | |
| 1180 dstp++; | |
| 1181 }, width); | |
| 1182 srcp += srcskip; | |
| 1183 dstp += dstskip; | |
| 1184 } | |
| 1185 } | |
| 1186 | |
| 1187 /* fast ARGB8888->RGB555 blending with pixel alpha */ | |
| 1188 static void BlitARGBto555PixelAlpha(SDL_BlitInfo *info) | |
| 1189 { | |
| 1190 int width = info->d_width; | |
| 1191 int height = info->d_height; | |
| 1192 Uint32 *srcp = (Uint32 *)info->s_pixels; | |
| 1193 int srcskip = info->s_skip >> 2; | |
| 1194 Uint16 *dstp = (Uint16 *)info->d_pixels; | |
| 1195 int dstskip = info->d_skip >> 1; | |
| 1196 | |
| 1197 while(height--) { | |
| 1198 DUFFS_LOOP4({ | |
| 1199 unsigned alpha; | |
| 1200 Uint32 s = *srcp; | |
| 1201 alpha = s >> 27; /* downscale alpha to 5 bits */ | |
| 1202 /* FIXME: Here we special-case opaque alpha since the | |
| 1203 compositioning used (>>8 instead of /255) doesn't handle | |
| 1204 it correctly. Also special-case alpha=0 for speed? | |
| 1205 Benchmark this! */ | |
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1206 if(alpha) { |
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1207 if(alpha == (SDL_ALPHA_OPAQUE >> 3)) { |
| 0 | 1208 *dstp = (s >> 9 & 0x7c00) + (s >> 6 & 0x3e0) |
| 1209 + (s >> 3 & 0x1f); | |
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1210 } else { |
| 0 | 1211 Uint32 d = *dstp; |
| 1212 /* | |
| 1213 * convert source and destination to G0RAB65565 | |
| 1214 * and blend all components at the same time | |
| 1215 */ | |
| 1216 s = ((s & 0xf800) << 10) + (s >> 9 & 0x7c00) | |
| 1217 + (s >> 3 & 0x1f); | |
| 1218 d = (d | d << 16) & 0x03e07c1f; | |
| 1219 d += (s - d) * alpha >> 5; | |
| 1220 d &= 0x03e07c1f; | |
| 1221 *dstp = d | d >> 16; | |
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1222 } |
| 0 | 1223 } |
| 1224 srcp++; | |
| 1225 dstp++; | |
| 1226 }, width); | |
| 1227 srcp += srcskip; | |
| 1228 dstp += dstskip; | |
| 1229 } | |
| 1230 } | |
| 1231 | |
| 1232 /* General (slow) N->N blending with per-surface alpha */ | |
| 1233 static void BlitNtoNSurfaceAlpha(SDL_BlitInfo *info) | |
| 1234 { | |
| 1235 int width = info->d_width; | |
| 1236 int height = info->d_height; | |
| 1237 Uint8 *src = info->s_pixels; | |
| 1238 int srcskip = info->s_skip; | |
| 1239 Uint8 *dst = info->d_pixels; | |
| 1240 int dstskip = info->d_skip; | |
| 1241 SDL_PixelFormat *srcfmt = info->src; | |
| 1242 SDL_PixelFormat *dstfmt = info->dst; | |
| 1243 int srcbpp = srcfmt->BytesPerPixel; | |
| 1244 int dstbpp = dstfmt->BytesPerPixel; | |
| 1245 unsigned sA = srcfmt->alpha; | |
| 1246 unsigned dA = dstfmt->Amask ? SDL_ALPHA_OPAQUE : 0; | |
| 1247 | |
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1248 if(sA) { |
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1249 while ( height-- ) { |
| 0 | 1250 DUFFS_LOOP4( |
| 1251 { | |
| 1252 Uint32 pixel; | |
| 1253 unsigned sR; | |
| 1254 unsigned sG; | |
| 1255 unsigned sB; | |
| 1256 unsigned dR; | |
| 1257 unsigned dG; | |
| 1258 unsigned dB; | |
| 1259 DISEMBLE_RGB(src, srcbpp, srcfmt, pixel, sR, sG, sB); | |
| 1260 DISEMBLE_RGB(dst, dstbpp, dstfmt, pixel, dR, dG, dB); | |
| 1261 ALPHA_BLEND(sR, sG, sB, sA, dR, dG, dB); | |
| 1262 ASSEMBLE_RGBA(dst, dstbpp, dstfmt, dR, dG, dB, dA); | |
| 1263 src += srcbpp; | |
| 1264 dst += dstbpp; | |
| 1265 }, | |
| 1266 width); | |
| 1267 src += srcskip; | |
| 1268 dst += dstskip; | |
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1269 } |
| 0 | 1270 } |
| 1271 } | |
| 1272 | |
| 1273 /* General (slow) colorkeyed N->N blending with per-surface alpha */ | |
| 1274 static void BlitNtoNSurfaceAlphaKey(SDL_BlitInfo *info) | |
| 1275 { | |
| 1276 int width = info->d_width; | |
| 1277 int height = info->d_height; | |
| 1278 Uint8 *src = info->s_pixels; | |
| 1279 int srcskip = info->s_skip; | |
| 1280 Uint8 *dst = info->d_pixels; | |
| 1281 int dstskip = info->d_skip; | |
| 1282 SDL_PixelFormat *srcfmt = info->src; | |
| 1283 SDL_PixelFormat *dstfmt = info->dst; | |
| 1284 Uint32 ckey = srcfmt->colorkey; | |
| 1285 int srcbpp = srcfmt->BytesPerPixel; | |
| 1286 int dstbpp = dstfmt->BytesPerPixel; | |
| 1287 unsigned sA = srcfmt->alpha; | |
| 1288 unsigned dA = dstfmt->Amask ? SDL_ALPHA_OPAQUE : 0; | |
| 1289 | |
| 1290 while ( height-- ) { | |
| 1291 DUFFS_LOOP4( | |
| 1292 { | |
| 1293 Uint32 pixel; | |
| 1294 unsigned sR; | |
| 1295 unsigned sG; | |
| 1296 unsigned sB; | |
| 1297 unsigned dR; | |
| 1298 unsigned dG; | |
| 1299 unsigned dB; | |
| 1300 RETRIEVE_RGB_PIXEL(src, srcbpp, pixel); | |
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1301 if(sA && pixel != ckey) { |
| 0 | 1302 RGB_FROM_PIXEL(pixel, srcfmt, sR, sG, sB); |
| 1303 DISEMBLE_RGB(dst, dstbpp, dstfmt, pixel, dR, dG, dB); | |
| 1304 ALPHA_BLEND(sR, sG, sB, sA, dR, dG, dB); | |
| 1305 ASSEMBLE_RGBA(dst, dstbpp, dstfmt, dR, dG, dB, dA); | |
| 1306 } | |
| 1307 src += srcbpp; | |
| 1308 dst += dstbpp; | |
| 1309 }, | |
| 1310 width); | |
| 1311 src += srcskip; | |
| 1312 dst += dstskip; | |
| 1313 } | |
| 1314 } | |
| 1315 | |
| 1316 /* General (slow) N->N blending with pixel alpha */ | |
| 1317 static void BlitNtoNPixelAlpha(SDL_BlitInfo *info) | |
| 1318 { | |
| 1319 int width = info->d_width; | |
| 1320 int height = info->d_height; | |
| 1321 Uint8 *src = info->s_pixels; | |
| 1322 int srcskip = info->s_skip; | |
| 1323 Uint8 *dst = info->d_pixels; | |
| 1324 int dstskip = info->d_skip; | |
| 1325 SDL_PixelFormat *srcfmt = info->src; | |
| 1326 SDL_PixelFormat *dstfmt = info->dst; | |
| 1327 | |
| 1328 int srcbpp; | |
| 1329 int dstbpp; | |
| 1330 | |
| 1331 /* Set up some basic variables */ | |
| 1332 srcbpp = srcfmt->BytesPerPixel; | |
| 1333 dstbpp = dstfmt->BytesPerPixel; | |
| 1334 | |
| 1335 /* FIXME: for 8bpp source alpha, this doesn't get opaque values | |
| 1336 quite right. for <8bpp source alpha, it gets them very wrong | |
| 1337 (check all macros!) | |
| 1338 It is unclear whether there is a good general solution that doesn't | |
| 1339 need a branch (or a divide). */ | |
| 1340 while ( height-- ) { | |
| 1341 DUFFS_LOOP4( | |
| 1342 { | |
| 1343 Uint32 pixel; | |
| 1344 unsigned sR; | |
| 1345 unsigned sG; | |
| 1346 unsigned sB; | |
| 1347 unsigned dR; | |
| 1348 unsigned dG; | |
| 1349 unsigned dB; | |
| 1350 unsigned sA; | |
| 1351 unsigned dA; | |
| 1352 DISEMBLE_RGBA(src, srcbpp, srcfmt, pixel, sR, sG, sB, sA); | |
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1353 if(sA) { |
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1354 DISEMBLE_RGBA(dst, dstbpp, dstfmt, pixel, dR, dG, dB, dA); |
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1355 ALPHA_BLEND(sR, sG, sB, sA, dR, dG, dB); |
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1356 ASSEMBLE_RGBA(dst, dstbpp, dstfmt, dR, dG, dB, dA); |
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1357 } |
| 0 | 1358 src += srcbpp; |
| 1359 dst += dstbpp; | |
| 1360 }, | |
| 1361 width); | |
| 1362 src += srcskip; | |
| 1363 dst += dstskip; | |
| 1364 } | |
| 1365 } | |
| 1366 | |
| 1367 | |
| 1368 SDL_loblit SDL_CalculateAlphaBlit(SDL_Surface *surface, int blit_index) | |
| 1369 { | |
| 1370 SDL_PixelFormat *sf = surface->format; | |
| 1371 SDL_PixelFormat *df = surface->map->dst->format; | |
| 1372 | |
| 1373 if(sf->Amask == 0) { | |
| 1374 if((surface->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY) { | |
| 1375 if(df->BytesPerPixel == 1) | |
| 1376 return BlitNto1SurfaceAlphaKey; | |
| 1377 else | |
| 1378 return BlitNtoNSurfaceAlphaKey; | |
| 1379 } else { | |
| 1380 /* Per-surface alpha blits */ | |
| 1381 switch(df->BytesPerPixel) { | |
| 1382 case 1: | |
| 1383 return BlitNto1SurfaceAlpha; | |
| 1384 | |
| 1385 case 2: | |
| 1386 if(surface->map->identity) { | |
| 1387 if(df->Gmask == 0x7e0) | |
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1388 { |
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1389 #if defined(i386) && defined(__GNUC__) && defined(USE_ASMBLIT) |
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1390 if((CPU_Flags()&MMX_CPU)!=0) |
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1391 return Blit565to565SurfaceAlphaMMX; |
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1392 else |
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1393 #endif |
| 0 | 1394 return Blit565to565SurfaceAlpha; |
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1395 } |
| 0 | 1396 else if(df->Gmask == 0x3e0) |
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1397 { |
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1398 #if defined(i386) && defined(__GNUC__) && defined(USE_ASMBLIT) |
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1399 if((CPU_Flags()&MMX_CPU)!=0) |
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1400 return Blit555to555SurfaceAlphaMMX; |
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1401 else |
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1402 #endif |
| 0 | 1403 return Blit555to555SurfaceAlpha; |
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1404 } |
| 0 | 1405 } |
| 1406 return BlitNtoNSurfaceAlpha; | |
| 1407 | |
| 1408 case 4: | |
| 1409 if(sf->Rmask == df->Rmask | |
| 1410 && sf->Gmask == df->Gmask | |
| 1411 && sf->Bmask == df->Bmask | |
| 1412 && (sf->Rmask | sf->Gmask | sf->Bmask) == 0xffffff | |
| 1413 && sf->BytesPerPixel == 4) | |
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1414 { |
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1415 #if defined(i386) && defined(__GNUC__) && defined(USE_ASMBLIT) |
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1416 if((CPU_Flags()&MMX_CPU)!=0) |
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1417 return BlitRGBtoRGBSurfaceAlphaMMX; |
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1418 else |
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1419 #endif |
| 0 | 1420 return BlitRGBtoRGBSurfaceAlpha; |
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1421 } |
| 0 | 1422 else |
| 1423 return BlitNtoNSurfaceAlpha; | |
| 1424 | |
| 1425 case 3: | |
| 1426 default: | |
| 1427 return BlitNtoNSurfaceAlpha; | |
| 1428 } | |
| 1429 } | |
| 1430 } else { | |
| 1431 /* Per-pixel alpha blits */ | |
| 1432 switch(df->BytesPerPixel) { | |
| 1433 case 1: | |
| 1434 return BlitNto1PixelAlpha; | |
| 1435 | |
| 1436 case 2: | |
| 1437 if(sf->BytesPerPixel == 4 && sf->Amask == 0xff000000 | |
| 1438 && sf->Gmask == 0xff00 | |
| 1439 && ((sf->Rmask == 0xff && df->Rmask == 0x1f) | |
| 1440 || (sf->Bmask == 0xff && df->Bmask == 0x1f))) { | |
| 1441 if(df->Gmask == 0x7e0) | |
| 1442 return BlitARGBto565PixelAlpha; | |
| 1443 else if(df->Gmask == 0x3e0) | |
| 1444 return BlitARGBto555PixelAlpha; | |
| 1445 } | |
| 1446 return BlitNtoNPixelAlpha; | |
| 1447 | |
| 1448 case 4: | |
| 1449 if(sf->Amask == 0xff000000 | |
| 1450 && sf->Rmask == df->Rmask | |
| 1451 && sf->Gmask == df->Gmask | |
| 1452 && sf->Bmask == df->Bmask | |
| 1453 && sf->BytesPerPixel == 4) | |
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1454 { |
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1455 #if defined(i386) && defined(__GNUC__) && defined(USE_ASMBLIT) |
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1456 Uint32 f; |
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1457 f=CPU_Flags(); |
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1458 if((f&(TDNOW_CPU|MMX_CPU))==(TDNOW_CPU|MMX_CPU)) |
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1459 return BlitRGBtoRGBPixelAlphaMMX3DNOW; |
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1460 else |
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1461 if((f&MMX_CPU)!=0) |
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1462 return BlitRGBtoRGBPixelAlphaMMX; |
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1463 else |
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1464 #endif |
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1465 return BlitRGBtoRGBPixelAlpha; |
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1466 } |
| 0 | 1467 return BlitNtoNPixelAlpha; |
| 1468 | |
| 1469 case 3: | |
| 1470 default: | |
| 1471 return BlitNtoNPixelAlpha; | |
| 1472 } | |
| 1473 } | |
| 1474 } | |
| 1475 |