Mercurial > sdl-ios-xcode
annotate src/video/SDL_blit.h @ 1312:c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
I batch edited these files, so please let me know if I've accidentally removed anybody's
credit here.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Wed, 01 Feb 2006 06:32:25 +0000 |
| parents | 2651158f59b8 |
| children | d910939febfa |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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3 Copyright (C) 1997-2006 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
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6 modify it under the terms of the GNU Lesser General Public |
| 0 | 7 License as published by the Free Software Foundation; either |
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8 version 2.1 of the License, or (at your option) any later version. |
| 0 | 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 | |
|
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13 Lesser General Public License for more details. |
| 0 | 14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
| 19 Sam Lantinga | |
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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 #ifndef _SDL_blit_h | |
| 24 #define _SDL_blit_h | |
| 25 | |
| 26 #include "SDL_endian.h" | |
| 27 | |
| 28 /* The structure passed to the low level blit functions */ | |
| 29 typedef struct { | |
| 30 Uint8 *s_pixels; | |
| 31 int s_width; | |
| 32 int s_height; | |
| 33 int s_skip; | |
| 34 Uint8 *d_pixels; | |
| 35 int d_width; | |
| 36 int d_height; | |
| 37 int d_skip; | |
| 38 void *aux_data; | |
| 39 SDL_PixelFormat *src; | |
| 40 Uint8 *table; | |
| 41 SDL_PixelFormat *dst; | |
| 42 } SDL_BlitInfo; | |
| 43 | |
| 44 /* The type definition for the low level blit functions */ | |
| 45 typedef void (*SDL_loblit)(SDL_BlitInfo *info); | |
| 46 | |
| 47 /* This is the private info structure for software accelerated blits */ | |
| 48 struct private_swaccel { | |
| 49 SDL_loblit blit; | |
| 50 void *aux_data; | |
| 51 }; | |
| 52 | |
| 53 /* Blit mapping definition */ | |
| 54 typedef struct SDL_BlitMap { | |
| 55 SDL_Surface *dst; | |
| 56 int identity; | |
| 57 Uint8 *table; | |
| 58 SDL_blit hw_blit; | |
| 59 SDL_blit sw_blit; | |
| 60 struct private_hwaccel *hw_data; | |
| 61 struct private_swaccel *sw_data; | |
| 62 | |
| 63 /* the version count matches the destination; mismatch indicates | |
| 64 an invalid mapping */ | |
| 65 unsigned int format_version; | |
| 66 } SDL_BlitMap; | |
| 67 | |
| 68 | |
| 69 /* Functions found in SDL_blit.c */ | |
| 70 extern int SDL_CalculateBlit(SDL_Surface *surface); | |
| 71 | |
| 72 /* Functions found in SDL_blit_{0,1,N,A}.c */ | |
| 73 extern SDL_loblit SDL_CalculateBlit0(SDL_Surface *surface, int complex); | |
| 74 extern SDL_loblit SDL_CalculateBlit1(SDL_Surface *surface, int complex); | |
| 75 extern SDL_loblit SDL_CalculateBlitN(SDL_Surface *surface, int complex); | |
| 76 extern SDL_loblit SDL_CalculateAlphaBlit(SDL_Surface *surface, int complex); | |
| 77 | |
| 78 /* | |
| 79 * Useful macros for blitting routines | |
| 80 */ | |
| 81 | |
| 82 #define FORMAT_EQUAL(A, B) \ | |
| 83 ((A)->BitsPerPixel == (B)->BitsPerPixel \ | |
| 84 && ((A)->Rmask == (B)->Rmask) && ((A)->Amask == (B)->Amask)) | |
| 85 | |
| 86 /* Load pixel of the specified format from a buffer and get its R-G-B values */ | |
| 87 /* FIXME: rescale values to 0..255 here? */ | |
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88 #define RGB_FROM_PIXEL(Pixel, fmt, r, g, b) \ |
| 0 | 89 { \ |
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90 r = (((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss); \ |
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91 g = (((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss); \ |
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92 b = (((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss); \ |
| 0 | 93 } |
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94 #define RGB_FROM_RGB565(Pixel, r, g, b) \ |
| 0 | 95 { \ |
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96 r = (((Pixel&0xF800)>>11)<<3); \ |
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97 g = (((Pixel&0x07E0)>>5)<<2); \ |
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98 b = ((Pixel&0x001F)<<3); \ |
| 0 | 99 } |
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100 #define RGB_FROM_RGB555(Pixel, r, g, b) \ |
| 0 | 101 { \ |
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102 r = (((Pixel&0x7C00)>>10)<<3); \ |
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103 g = (((Pixel&0x03E0)>>5)<<3); \ |
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104 b = ((Pixel&0x001F)<<3); \ |
| 0 | 105 } |
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106 #define RGB_FROM_RGB888(Pixel, r, g, b) \ |
| 0 | 107 { \ |
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108 r = ((Pixel&0xFF0000)>>16); \ |
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109 g = ((Pixel&0xFF00)>>8); \ |
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110 b = (Pixel&0xFF); \ |
| 0 | 111 } |
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112 #define RETRIEVE_RGB_PIXEL(buf, bpp, Pixel) \ |
| 0 | 113 do { \ |
| 114 switch (bpp) { \ | |
| 115 case 2: \ | |
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116 Pixel = *((Uint16 *)(buf)); \ |
| 0 | 117 break; \ |
| 118 \ | |
| 119 case 3: { \ | |
| 120 Uint8 *B = (Uint8 *)(buf); \ | |
| 121 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ | |
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122 Pixel = B[0] + (B[1] << 8) + (B[2] << 16); \ |
| 0 | 123 } else { \ |
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124 Pixel = (B[0] << 16) + (B[1] << 8) + B[2]; \ |
| 0 | 125 } \ |
| 126 } \ | |
| 127 break; \ | |
| 128 \ | |
| 129 case 4: \ | |
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130 Pixel = *((Uint32 *)(buf)); \ |
| 0 | 131 break; \ |
| 132 \ | |
| 133 default: \ | |
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134 Pixel = 0; /* appease gcc */ \ |
| 0 | 135 break; \ |
| 136 } \ | |
| 137 } while(0) | |
| 138 | |
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139 #define DISEMBLE_RGB(buf, bpp, fmt, Pixel, r, g, b) \ |
| 0 | 140 do { \ |
| 141 switch (bpp) { \ | |
| 142 case 2: \ | |
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143 Pixel = *((Uint16 *)(buf)); \ |
| 0 | 144 break; \ |
| 145 \ | |
| 146 case 3: { \ | |
| 147 Uint8 *B = (Uint8 *)buf; \ | |
| 148 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ | |
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149 Pixel = B[0] + (B[1] << 8) + (B[2] << 16); \ |
| 0 | 150 } else { \ |
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151 Pixel = (B[0] << 16) + (B[1] << 8) + B[2]; \ |
| 0 | 152 } \ |
| 153 } \ | |
| 154 break; \ | |
| 155 \ | |
| 156 case 4: \ | |
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157 Pixel = *((Uint32 *)(buf)); \ |
| 0 | 158 break; \ |
| 159 \ | |
| 160 default: \ | |
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161 Pixel = 0; /* prevent gcc from complaining */ \ |
| 0 | 162 break; \ |
| 163 } \ | |
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164 RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \ |
| 0 | 165 } while(0) |
| 166 | |
| 167 /* Assemble R-G-B values into a specified pixel format and store them */ | |
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168 #define PIXEL_FROM_RGB(Pixel, fmt, r, g, b) \ |
| 0 | 169 { \ |
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170 Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \ |
| 0 | 171 ((g>>fmt->Gloss)<<fmt->Gshift)| \ |
| 172 ((b>>fmt->Bloss)<<fmt->Bshift); \ | |
| 173 } | |
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174 #define RGB565_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 175 { \ |
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176 Pixel = ((r>>3)<<11)|((g>>2)<<5)|(b>>3); \ |
| 0 | 177 } |
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178 #define RGB555_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 179 { \ |
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180 Pixel = ((r>>3)<<10)|((g>>3)<<5)|(b>>3); \ |
| 0 | 181 } |
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182 #define RGB888_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 183 { \ |
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184 Pixel = (r<<16)|(g<<8)|b; \ |
| 0 | 185 } |
| 186 #define ASSEMBLE_RGB(buf, bpp, fmt, r, g, b) \ | |
| 187 { \ | |
| 188 switch (bpp) { \ | |
| 189 case 2: { \ | |
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190 Uint16 Pixel; \ |
| 0 | 191 \ |
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192 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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193 *((Uint16 *)(buf)) = Pixel; \ |
| 0 | 194 } \ |
| 195 break; \ | |
| 196 \ | |
| 197 case 3: { \ | |
| 198 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ | |
| 199 *((buf)+fmt->Rshift/8) = r; \ | |
| 200 *((buf)+fmt->Gshift/8) = g; \ | |
| 201 *((buf)+fmt->Bshift/8) = b; \ | |
| 202 } else { \ | |
| 203 *((buf)+2-fmt->Rshift/8) = r; \ | |
| 204 *((buf)+2-fmt->Gshift/8) = g; \ | |
| 205 *((buf)+2-fmt->Bshift/8) = b; \ | |
| 206 } \ | |
| 207 } \ | |
| 208 break; \ | |
| 209 \ | |
| 210 case 4: { \ | |
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211 Uint32 Pixel; \ |
| 0 | 212 \ |
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213 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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214 *((Uint32 *)(buf)) = Pixel; \ |
| 0 | 215 } \ |
| 216 break; \ | |
| 217 } \ | |
| 218 } | |
| 219 #define ASSEMBLE_RGB_AMASK(buf, bpp, fmt, r, g, b, Amask) \ | |
| 220 { \ | |
| 221 switch (bpp) { \ | |
| 222 case 2: { \ | |
| 223 Uint16 *bufp; \ | |
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224 Uint16 Pixel; \ |
| 0 | 225 \ |
| 226 bufp = (Uint16 *)buf; \ | |
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227 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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228 *bufp = Pixel | (*bufp & Amask); \ |
| 0 | 229 } \ |
| 230 break; \ | |
| 231 \ | |
| 232 case 3: { \ | |
| 233 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ | |
| 234 *((buf)+fmt->Rshift/8) = r; \ | |
| 235 *((buf)+fmt->Gshift/8) = g; \ | |
| 236 *((buf)+fmt->Bshift/8) = b; \ | |
| 237 } else { \ | |
| 238 *((buf)+2-fmt->Rshift/8) = r; \ | |
| 239 *((buf)+2-fmt->Gshift/8) = g; \ | |
| 240 *((buf)+2-fmt->Bshift/8) = b; \ | |
| 241 } \ | |
| 242 } \ | |
| 243 break; \ | |
| 244 \ | |
| 245 case 4: { \ | |
| 246 Uint32 *bufp; \ | |
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247 Uint32 Pixel; \ |
| 0 | 248 \ |
| 249 bufp = (Uint32 *)buf; \ | |
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250 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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251 *bufp = Pixel | (*bufp & Amask); \ |
| 0 | 252 } \ |
| 253 break; \ | |
| 254 } \ | |
| 255 } | |
| 256 | |
| 257 /* FIXME: Should we rescale alpha into 0..255 here? */ | |
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258 #define RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a) \ |
| 0 | 259 { \ |
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260 r = ((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss; \ |
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261 g = ((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss; \ |
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262 b = ((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss; \ |
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263 a = ((Pixel&fmt->Amask)>>fmt->Ashift)<<fmt->Aloss; \ |
| 0 | 264 } |
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265 #define RGBA_FROM_8888(Pixel, fmt, r, g, b, a) \ |
| 0 | 266 { \ |
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267 r = (Pixel&fmt->Rmask)>>fmt->Rshift; \ |
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268 g = (Pixel&fmt->Gmask)>>fmt->Gshift; \ |
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269 b = (Pixel&fmt->Bmask)>>fmt->Bshift; \ |
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270 a = (Pixel&fmt->Amask)>>fmt->Ashift; \ |
| 0 | 271 } |
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272 #define RGBA_FROM_RGBA8888(Pixel, r, g, b, a) \ |
| 0 | 273 { \ |
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274 r = (Pixel>>24); \ |
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275 g = ((Pixel>>16)&0xFF); \ |
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276 b = ((Pixel>>8)&0xFF); \ |
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277 a = (Pixel&0xFF); \ |
| 0 | 278 } |
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279 #define RGBA_FROM_ARGB8888(Pixel, r, g, b, a) \ |
| 0 | 280 { \ |
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281 r = ((Pixel>>16)&0xFF); \ |
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282 g = ((Pixel>>8)&0xFF); \ |
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283 b = (Pixel&0xFF); \ |
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284 a = (Pixel>>24); \ |
| 0 | 285 } |
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286 #define RGBA_FROM_ABGR8888(Pixel, r, g, b, a) \ |
| 0 | 287 { \ |
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288 r = (Pixel&0xFF); \ |
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289 g = ((Pixel>>8)&0xFF); \ |
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290 b = ((Pixel>>16)&0xFF); \ |
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291 a = (Pixel>>24); \ |
| 0 | 292 } |
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293 #define DISEMBLE_RGBA(buf, bpp, fmt, Pixel, r, g, b, a) \ |
| 0 | 294 do { \ |
| 295 switch (bpp) { \ | |
| 296 case 2: \ | |
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297 Pixel = *((Uint16 *)(buf)); \ |
| 0 | 298 break; \ |
| 299 \ | |
| 300 case 3: {/* FIXME: broken code (no alpha) */ \ | |
| 301 Uint8 *b = (Uint8 *)buf; \ | |
| 302 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ | |
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303 Pixel = b[0] + (b[1] << 8) + (b[2] << 16); \ |
| 0 | 304 } else { \ |
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305 Pixel = (b[0] << 16) + (b[1] << 8) + b[2]; \ |
| 0 | 306 } \ |
| 307 } \ | |
| 308 break; \ | |
| 309 \ | |
| 310 case 4: \ | |
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311 Pixel = *((Uint32 *)(buf)); \ |
| 0 | 312 break; \ |
| 313 \ | |
| 314 default: \ | |
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315 Pixel = 0; /* stop gcc complaints */ \ |
| 0 | 316 break; \ |
| 317 } \ | |
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318 RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a); \ |
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319 Pixel &= ~fmt->Amask; \ |
| 0 | 320 } while(0) |
| 321 | |
| 322 /* FIXME: this isn't correct, especially for Alpha (maximum != 255) */ | |
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323 #define PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a) \ |
| 0 | 324 { \ |
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325 Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \ |
| 0 | 326 ((g>>fmt->Gloss)<<fmt->Gshift)| \ |
| 327 ((b>>fmt->Bloss)<<fmt->Bshift)| \ | |
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328 ((a>>fmt->Aloss)<<fmt->Ashift); \ |
| 0 | 329 } |
| 330 #define ASSEMBLE_RGBA(buf, bpp, fmt, r, g, b, a) \ | |
| 331 { \ | |
| 332 switch (bpp) { \ | |
| 333 case 2: { \ | |
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334 Uint16 Pixel; \ |
| 0 | 335 \ |
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336 PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a); \ |
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337 *((Uint16 *)(buf)) = Pixel; \ |
| 0 | 338 } \ |
| 339 break; \ | |
| 340 \ | |
| 341 case 3: { /* FIXME: broken code (no alpha) */ \ | |
| 342 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ | |
| 343 *((buf)+fmt->Rshift/8) = r; \ | |
| 344 *((buf)+fmt->Gshift/8) = g; \ | |
| 345 *((buf)+fmt->Bshift/8) = b; \ | |
| 346 } else { \ | |
| 347 *((buf)+2-fmt->Rshift/8) = r; \ | |
| 348 *((buf)+2-fmt->Gshift/8) = g; \ | |
| 349 *((buf)+2-fmt->Bshift/8) = b; \ | |
| 350 } \ | |
| 351 } \ | |
| 352 break; \ | |
| 353 \ | |
| 354 case 4: { \ | |
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355 Uint32 Pixel; \ |
| 0 | 356 \ |
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357 PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a); \ |
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358 *((Uint32 *)(buf)) = Pixel; \ |
| 0 | 359 } \ |
| 360 break; \ | |
| 361 } \ | |
| 362 } | |
| 363 | |
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364 /* Blend the RGB values of two Pixels based on a source alpha value */ |
| 0 | 365 #define ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB) \ |
| 366 do { \ | |
| 367 dR = (((sR-dR)*(A))>>8)+dR; \ | |
| 368 dG = (((sG-dG)*(A))>>8)+dG; \ | |
| 369 dB = (((sB-dB)*(A))>>8)+dB; \ | |
| 370 } while(0) | |
| 371 | |
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372 /* Blend the RGB values of two Pixels based on a source alpha value */ |
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373 #define ACCURATE_ALPHA_BLEND(sR, sG, sB, sA, dR, dG, dB) \ |
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374 do { \ |
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375 unsigned tR, tG, tB, tA; \ |
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376 tA = 255 - sA; \ |
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377 tR = 1 + (sR * sA) + (dR * tA); \ |
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378 dR = (tR + (tR >> 8)) >> 8; \ |
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379 tG = 1 + (sG * sA) + (dG * tA); \ |
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380 dG = (tG + (tG >> 8)) >> 8; \ |
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381 tB = 1 + (sB * sA) + (dB * tA); \ |
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382 dB = (tB + (tB >> 8)) >> 8; \ |
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383 } while(0) |
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384 |
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385 |
| 0 | 386 /* This is a very useful loop for optimizing blitters */ |
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387 #if defined(_MSC_VER) && (_MSC_VER == 1300) |
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388 /* There's a bug in the Visual C++ 7 optimizer when compiling this code */ |
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389 #else |
| 0 | 390 #define USE_DUFFS_LOOP |
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391 #endif |
| 0 | 392 #ifdef USE_DUFFS_LOOP |
| 393 | |
| 394 /* 8-times unrolled loop */ | |
| 395 #define DUFFS_LOOP8(pixel_copy_increment, width) \ | |
| 396 { int n = (width+7)/8; \ | |
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397 switch (width & 7) { \ |
| 0 | 398 case 0: do { pixel_copy_increment; \ |
| 399 case 7: pixel_copy_increment; \ | |
| 400 case 6: pixel_copy_increment; \ | |
| 401 case 5: pixel_copy_increment; \ | |
| 402 case 4: pixel_copy_increment; \ | |
| 403 case 3: pixel_copy_increment; \ | |
| 404 case 2: pixel_copy_increment; \ | |
| 405 case 1: pixel_copy_increment; \ | |
| 406 } while ( --n > 0 ); \ | |
| 407 } \ | |
| 408 } | |
| 409 | |
| 410 /* 4-times unrolled loop */ | |
| 411 #define DUFFS_LOOP4(pixel_copy_increment, width) \ | |
| 412 { int n = (width+3)/4; \ | |
|
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413 switch (width & 3) { \ |
| 0 | 414 case 0: do { pixel_copy_increment; \ |
| 415 case 3: pixel_copy_increment; \ | |
| 416 case 2: pixel_copy_increment; \ | |
| 417 case 1: pixel_copy_increment; \ | |
| 418 } while ( --n > 0 ); \ | |
| 419 } \ | |
| 420 } | |
| 421 | |
|
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422 /* 2 - times unrolled loop */ |
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423 #define DUFFS_LOOP_DOUBLE2(pixel_copy_increment, \ |
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424 double_pixel_copy_increment, width) \ |
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425 { int n, w = width; \ |
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426 if( w & 1 ) { \ |
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427 pixel_copy_increment; \ |
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428 w--; \ |
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429 } \ |
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430 if ( w > 0 ) { \ |
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431 n = ( w + 2) / 4; \ |
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432 switch( w & 2 ) { \ |
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433 case 0: do { double_pixel_copy_increment; \ |
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434 case 2: double_pixel_copy_increment; \ |
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435 } while ( --n > 0 ); \ |
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436 } \ |
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437 } \ |
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438 } |
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439 |
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440 /* 2 - times unrolled loop 4 pixels */ |
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441 #define DUFFS_LOOP_QUATRO2(pixel_copy_increment, \ |
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442 double_pixel_copy_increment, \ |
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443 quatro_pixel_copy_increment, width) \ |
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444 { int n, w = width; \ |
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445 if(w & 1) { \ |
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446 pixel_copy_increment; \ |
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447 w--; \ |
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448 } \ |
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449 if(w & 2) { \ |
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450 double_pixel_copy_increment; \ |
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Sam Lantinga <slouken@libsdl.org>
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451 w -= 2; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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452 } \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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453 if ( w > 0 ) { \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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454 n = ( w + 7 ) / 8; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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455 switch( w & 4 ) { \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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456 case 0: do { quatro_pixel_copy_increment; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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457 case 4: quatro_pixel_copy_increment; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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458 } while ( --n > 0 ); \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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459 } \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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460 } \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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461 } |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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462 |
| 0 | 463 /* Use the 8-times version of the loop by default */ |
| 464 #define DUFFS_LOOP(pixel_copy_increment, width) \ | |
| 465 DUFFS_LOOP8(pixel_copy_increment, width) | |
| 466 | |
| 467 #else | |
| 468 | |
| 469 /* Don't use Duff's device to unroll loops */ | |
|
689
5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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470 #define DUFFS_LOOP_DOUBLE2(pixel_copy_increment, \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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471 double_pixel_copy_increment, width) \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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472 { int n = width; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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473 if( n & 1 ) { \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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474 pixel_copy_increment; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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475 n--; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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476 } \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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477 n=n>>1; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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478 for(; n > 0; --n) { \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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479 double_pixel_copy_increment; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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480 } \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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481 } |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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482 |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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483 /* Don't use Duff's device to unroll loops */ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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484 #define DUFFS_LOOP_QUATRO2(pixel_copy_increment, \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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485 double_pixel_copy_increment, \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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486 quatro_pixel_copy_increment, width) \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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487 { int n = width; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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488 if(n & 1) { \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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489 pixel_copy_increment; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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490 n--; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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491 } \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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492 if(n & 2) { \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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493 double_pixel_copy_increment; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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494 n -= 2; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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495 } \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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553
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496 n=n>>2; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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diff
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497 for(; n > 0; --n) { \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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553
diff
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498 quatro_pixel_copy_increment; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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553
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499 } \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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diff
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500 } |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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501 |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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502 /* Don't use Duff's device to unroll loops */ |
| 0 | 503 #define DUFFS_LOOP(pixel_copy_increment, width) \ |
| 504 { int n; \ | |
| 505 for ( n=width; n > 0; --n ) { \ | |
| 506 pixel_copy_increment; \ | |
| 507 } \ | |
| 508 } | |
| 509 #define DUFFS_LOOP8(pixel_copy_increment, width) \ | |
| 510 DUFFS_LOOP(pixel_copy_increment, width) | |
| 511 #define DUFFS_LOOP4(pixel_copy_increment, width) \ | |
| 512 DUFFS_LOOP(pixel_copy_increment, width) | |
| 513 | |
| 514 #endif /* USE_DUFFS_LOOP */ | |
| 515 | |
| 516 /* Prevent Visual C++ 6.0 from printing out stupid warnings */ | |
| 517 #if defined(_MSC_VER) && (_MSC_VER >= 600) | |
| 518 #pragma warning(disable: 4550) | |
| 519 #endif | |
| 520 | |
| 521 #endif /* _SDL_blit_h */ |