Mercurial > sdl-ios-xcode
annotate src/video/SDL_blit.h @ 2236:741afd8402cf
This is byte order dependent.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sun, 12 Aug 2007 18:53:51 +0000 |
| parents | c121d94672cb |
| children | 93994f65c74c |
| 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 */ |
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22 #include "SDL_config.h" |
| 0 | 23 |
| 24 #ifndef _SDL_blit_h | |
| 25 #define _SDL_blit_h | |
| 26 | |
| 27 #include "SDL_endian.h" | |
| 28 | |
| 29 /* The structure passed to the low level blit functions */ | |
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30 typedef struct |
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31 { |
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32 Uint8 *s_pixels; |
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33 int s_width; |
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34 int s_height; |
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35 int s_skip; |
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36 Uint8 *d_pixels; |
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37 int d_width; |
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38 int d_height; |
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39 int d_skip; |
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40 void *aux_data; |
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41 SDL_PixelFormat *src; |
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42 Uint8 *table; |
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43 SDL_PixelFormat *dst; |
| 0 | 44 } SDL_BlitInfo; |
| 45 | |
| 46 /* The type definition for the low level blit functions */ | |
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47 typedef void (*SDL_loblit) (SDL_BlitInfo * info); |
| 0 | 48 |
| 49 /* This is the private info structure for software accelerated blits */ | |
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50 struct private_swaccel |
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51 { |
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52 SDL_loblit blit; |
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53 void *aux_data; |
| 0 | 54 }; |
| 55 | |
| 56 /* Blit mapping definition */ | |
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57 typedef struct SDL_BlitMap |
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58 { |
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59 SDL_Surface *dst; |
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60 int identity; |
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61 Uint8 *table; |
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62 SDL_blit sw_blit; |
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63 struct private_swaccel *sw_data; |
| 0 | 64 |
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65 /* the version count matches the destination; mismatch indicates |
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66 an invalid mapping */ |
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67 unsigned int format_version; |
| 0 | 68 } SDL_BlitMap; |
| 69 | |
| 70 | |
| 71 /* Functions found in SDL_blit.c */ | |
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72 extern int SDL_CalculateBlit(SDL_Surface * surface); |
| 0 | 73 |
| 74 /* Functions found in SDL_blit_{0,1,N,A}.c */ | |
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75 extern SDL_loblit SDL_CalculateBlit0(SDL_Surface * surface, int complex); |
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76 extern SDL_loblit SDL_CalculateBlit1(SDL_Surface * surface, int complex); |
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77 extern SDL_loblit SDL_CalculateBlitN(SDL_Surface * surface, int complex); |
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78 extern SDL_loblit SDL_CalculateAlphaBlit(SDL_Surface * surface, int complex); |
| 0 | 79 |
| 80 /* | |
| 81 * Useful macros for blitting routines | |
| 82 */ | |
| 83 | |
| 84 #define FORMAT_EQUAL(A, B) \ | |
| 85 ((A)->BitsPerPixel == (B)->BitsPerPixel \ | |
| 86 && ((A)->Rmask == (B)->Rmask) && ((A)->Amask == (B)->Amask)) | |
| 87 | |
| 88 /* Load pixel of the specified format from a buffer and get its R-G-B values */ | |
| 89 /* FIXME: rescale values to 0..255 here? */ | |
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90 #define RGB_FROM_PIXEL(Pixel, fmt, r, g, b) \ |
| 0 | 91 { \ |
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92 r = (((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss); \ |
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93 g = (((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss); \ |
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94 b = (((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss); \ |
| 0 | 95 } |
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96 #define RGB_FROM_RGB565(Pixel, r, g, b) \ |
| 0 | 97 { \ |
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98 r = (((Pixel&0xF800)>>11)<<3); \ |
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99 g = (((Pixel&0x07E0)>>5)<<2); \ |
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100 b = ((Pixel&0x001F)<<3); \ |
| 0 | 101 } |
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102 #define RGB_FROM_RGB555(Pixel, r, g, b) \ |
| 0 | 103 { \ |
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104 r = (((Pixel&0x7C00)>>10)<<3); \ |
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105 g = (((Pixel&0x03E0)>>5)<<3); \ |
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106 b = ((Pixel&0x001F)<<3); \ |
| 0 | 107 } |
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108 #define RGB_FROM_RGB888(Pixel, r, g, b) \ |
| 0 | 109 { \ |
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110 r = ((Pixel&0xFF0000)>>16); \ |
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111 g = ((Pixel&0xFF00)>>8); \ |
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112 b = (Pixel&0xFF); \ |
| 0 | 113 } |
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114 #define RETRIEVE_RGB_PIXEL(buf, bpp, Pixel) \ |
| 0 | 115 do { \ |
| 116 switch (bpp) { \ | |
| 117 case 2: \ | |
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118 Pixel = *((Uint16 *)(buf)); \ |
| 0 | 119 break; \ |
| 120 \ | |
| 121 case 3: { \ | |
| 122 Uint8 *B = (Uint8 *)(buf); \ | |
| 123 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ | |
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124 Pixel = B[0] + (B[1] << 8) + (B[2] << 16); \ |
| 0 | 125 } else { \ |
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126 Pixel = (B[0] << 16) + (B[1] << 8) + B[2]; \ |
| 0 | 127 } \ |
| 128 } \ | |
| 129 break; \ | |
| 130 \ | |
| 131 case 4: \ | |
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132 Pixel = *((Uint32 *)(buf)); \ |
| 0 | 133 break; \ |
| 134 \ | |
| 135 default: \ | |
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136 Pixel = 0; /* appease gcc */ \ |
| 0 | 137 break; \ |
| 138 } \ | |
| 139 } while(0) | |
| 140 | |
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141 #define DISEMBLE_RGB(buf, bpp, fmt, Pixel, r, g, b) \ |
| 0 | 142 do { \ |
| 143 switch (bpp) { \ | |
| 144 case 2: \ | |
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145 Pixel = *((Uint16 *)(buf)); \ |
| 0 | 146 break; \ |
| 147 \ | |
| 148 case 3: { \ | |
| 149 Uint8 *B = (Uint8 *)buf; \ | |
| 150 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ | |
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151 Pixel = B[0] + (B[1] << 8) + (B[2] << 16); \ |
| 0 | 152 } else { \ |
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153 Pixel = (B[0] << 16) + (B[1] << 8) + B[2]; \ |
| 0 | 154 } \ |
| 155 } \ | |
| 156 break; \ | |
| 157 \ | |
| 158 case 4: \ | |
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159 Pixel = *((Uint32 *)(buf)); \ |
| 0 | 160 break; \ |
| 161 \ | |
| 162 default: \ | |
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163 Pixel = 0; /* prevent gcc from complaining */ \ |
| 0 | 164 break; \ |
| 165 } \ | |
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166 RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \ |
| 0 | 167 } while(0) |
| 168 | |
| 169 /* Assemble R-G-B values into a specified pixel format and store them */ | |
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170 #define PIXEL_FROM_RGB(Pixel, fmt, r, g, b) \ |
| 0 | 171 { \ |
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172 Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \ |
| 0 | 173 ((g>>fmt->Gloss)<<fmt->Gshift)| \ |
| 174 ((b>>fmt->Bloss)<<fmt->Bshift); \ | |
| 175 } | |
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176 #define RGB565_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 177 { \ |
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178 Pixel = ((r>>3)<<11)|((g>>2)<<5)|(b>>3); \ |
| 0 | 179 } |
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180 #define RGB555_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 181 { \ |
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182 Pixel = ((r>>3)<<10)|((g>>3)<<5)|(b>>3); \ |
| 0 | 183 } |
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184 #define RGB888_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 185 { \ |
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186 Pixel = (r<<16)|(g<<8)|b; \ |
| 0 | 187 } |
| 188 #define ASSEMBLE_RGB(buf, bpp, fmt, r, g, b) \ | |
| 189 { \ | |
| 190 switch (bpp) { \ | |
| 191 case 2: { \ | |
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192 Uint16 Pixel; \ |
| 0 | 193 \ |
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194 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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195 *((Uint16 *)(buf)) = Pixel; \ |
| 0 | 196 } \ |
| 197 break; \ | |
| 198 \ | |
| 199 case 3: { \ | |
| 200 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ | |
| 201 *((buf)+fmt->Rshift/8) = r; \ | |
| 202 *((buf)+fmt->Gshift/8) = g; \ | |
| 203 *((buf)+fmt->Bshift/8) = b; \ | |
| 204 } else { \ | |
| 205 *((buf)+2-fmt->Rshift/8) = r; \ | |
| 206 *((buf)+2-fmt->Gshift/8) = g; \ | |
| 207 *((buf)+2-fmt->Bshift/8) = b; \ | |
| 208 } \ | |
| 209 } \ | |
| 210 break; \ | |
| 211 \ | |
| 212 case 4: { \ | |
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213 Uint32 Pixel; \ |
| 0 | 214 \ |
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215 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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216 *((Uint32 *)(buf)) = Pixel; \ |
| 0 | 217 } \ |
| 218 break; \ | |
| 219 } \ | |
| 220 } | |
| 221 #define ASSEMBLE_RGB_AMASK(buf, bpp, fmt, r, g, b, Amask) \ | |
| 222 { \ | |
| 223 switch (bpp) { \ | |
| 224 case 2: { \ | |
| 225 Uint16 *bufp; \ | |
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226 Uint16 Pixel; \ |
| 0 | 227 \ |
| 228 bufp = (Uint16 *)buf; \ | |
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229 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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230 *bufp = Pixel | (*bufp & Amask); \ |
| 0 | 231 } \ |
| 232 break; \ | |
| 233 \ | |
| 234 case 3: { \ | |
| 235 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ | |
| 236 *((buf)+fmt->Rshift/8) = r; \ | |
| 237 *((buf)+fmt->Gshift/8) = g; \ | |
| 238 *((buf)+fmt->Bshift/8) = b; \ | |
| 239 } else { \ | |
| 240 *((buf)+2-fmt->Rshift/8) = r; \ | |
| 241 *((buf)+2-fmt->Gshift/8) = g; \ | |
| 242 *((buf)+2-fmt->Bshift/8) = b; \ | |
| 243 } \ | |
| 244 } \ | |
| 245 break; \ | |
| 246 \ | |
| 247 case 4: { \ | |
| 248 Uint32 *bufp; \ | |
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249 Uint32 Pixel; \ |
| 0 | 250 \ |
| 251 bufp = (Uint32 *)buf; \ | |
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252 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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253 *bufp = Pixel | (*bufp & Amask); \ |
| 0 | 254 } \ |
| 255 break; \ | |
| 256 } \ | |
| 257 } | |
| 258 | |
| 259 /* FIXME: Should we rescale alpha into 0..255 here? */ | |
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260 #define RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a) \ |
| 0 | 261 { \ |
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262 r = ((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss; \ |
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263 g = ((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss; \ |
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264 b = ((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss; \ |
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265 a = ((Pixel&fmt->Amask)>>fmt->Ashift)<<fmt->Aloss; \ |
| 0 | 266 } |
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267 #define RGBA_FROM_8888(Pixel, fmt, r, g, b, a) \ |
| 0 | 268 { \ |
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269 r = (Pixel&fmt->Rmask)>>fmt->Rshift; \ |
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270 g = (Pixel&fmt->Gmask)>>fmt->Gshift; \ |
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271 b = (Pixel&fmt->Bmask)>>fmt->Bshift; \ |
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272 a = (Pixel&fmt->Amask)>>fmt->Ashift; \ |
| 0 | 273 } |
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274 #define RGBA_FROM_RGBA8888(Pixel, r, g, b, a) \ |
| 0 | 275 { \ |
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276 r = (Pixel>>24); \ |
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277 g = ((Pixel>>16)&0xFF); \ |
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278 b = ((Pixel>>8)&0xFF); \ |
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279 a = (Pixel&0xFF); \ |
| 0 | 280 } |
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281 #define RGBA_FROM_ARGB8888(Pixel, r, g, b, a) \ |
| 0 | 282 { \ |
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283 r = ((Pixel>>16)&0xFF); \ |
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284 g = ((Pixel>>8)&0xFF); \ |
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285 b = (Pixel&0xFF); \ |
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286 a = (Pixel>>24); \ |
| 0 | 287 } |
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288 #define RGBA_FROM_ABGR8888(Pixel, r, g, b, a) \ |
| 0 | 289 { \ |
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290 r = (Pixel&0xFF); \ |
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291 g = ((Pixel>>8)&0xFF); \ |
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292 b = ((Pixel>>16)&0xFF); \ |
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293 a = (Pixel>>24); \ |
| 0 | 294 } |
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295 #define DISEMBLE_RGBA(buf, bpp, fmt, Pixel, r, g, b, a) \ |
| 0 | 296 do { \ |
| 297 switch (bpp) { \ | |
| 298 case 2: \ | |
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299 Pixel = *((Uint16 *)(buf)); \ |
| 0 | 300 break; \ |
| 301 \ | |
| 302 case 3: {/* FIXME: broken code (no alpha) */ \ | |
| 303 Uint8 *b = (Uint8 *)buf; \ | |
| 304 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ | |
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305 Pixel = b[0] + (b[1] << 8) + (b[2] << 16); \ |
| 0 | 306 } else { \ |
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307 Pixel = (b[0] << 16) + (b[1] << 8) + b[2]; \ |
| 0 | 308 } \ |
| 309 } \ | |
| 310 break; \ | |
| 311 \ | |
| 312 case 4: \ | |
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313 Pixel = *((Uint32 *)(buf)); \ |
| 0 | 314 break; \ |
| 315 \ | |
| 316 default: \ | |
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317 Pixel = 0; /* stop gcc complaints */ \ |
| 0 | 318 break; \ |
| 319 } \ | |
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320 RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a); \ |
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321 Pixel &= ~fmt->Amask; \ |
| 0 | 322 } while(0) |
| 323 | |
| 324 /* FIXME: this isn't correct, especially for Alpha (maximum != 255) */ | |
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325 #define PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a) \ |
| 0 | 326 { \ |
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327 Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \ |
| 0 | 328 ((g>>fmt->Gloss)<<fmt->Gshift)| \ |
| 329 ((b>>fmt->Bloss)<<fmt->Bshift)| \ | |
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330 ((a>>fmt->Aloss)<<fmt->Ashift); \ |
| 0 | 331 } |
| 332 #define ASSEMBLE_RGBA(buf, bpp, fmt, r, g, b, a) \ | |
| 333 { \ | |
| 334 switch (bpp) { \ | |
| 335 case 2: { \ | |
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336 Uint16 Pixel; \ |
| 0 | 337 \ |
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338 PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a); \ |
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339 *((Uint16 *)(buf)) = Pixel; \ |
| 0 | 340 } \ |
| 341 break; \ | |
| 342 \ | |
| 343 case 3: { /* FIXME: broken code (no alpha) */ \ | |
| 344 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ | |
| 345 *((buf)+fmt->Rshift/8) = r; \ | |
| 346 *((buf)+fmt->Gshift/8) = g; \ | |
| 347 *((buf)+fmt->Bshift/8) = b; \ | |
| 348 } else { \ | |
| 349 *((buf)+2-fmt->Rshift/8) = r; \ | |
| 350 *((buf)+2-fmt->Gshift/8) = g; \ | |
| 351 *((buf)+2-fmt->Bshift/8) = b; \ | |
| 352 } \ | |
| 353 } \ | |
| 354 break; \ | |
| 355 \ | |
| 356 case 4: { \ | |
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357 Uint32 Pixel; \ |
| 0 | 358 \ |
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359 PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a); \ |
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360 *((Uint32 *)(buf)) = Pixel; \ |
| 0 | 361 } \ |
| 362 break; \ | |
| 363 } \ | |
| 364 } | |
| 365 | |
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366 /* Blend the RGB values of two Pixels based on a source alpha value */ |
| 0 | 367 #define ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB) \ |
| 368 do { \ | |
| 369 dR = (((sR-dR)*(A))>>8)+dR; \ | |
| 370 dG = (((sG-dG)*(A))>>8)+dG; \ | |
| 371 dB = (((sB-dB)*(A))>>8)+dB; \ | |
| 372 } while(0) | |
| 373 | |
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374 /* Blend the RGB values of two Pixels based on a source alpha value */ |
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375 #define ACCURATE_ALPHA_BLEND(sR, sG, sB, sA, dR, dG, dB) \ |
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376 do { \ |
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377 unsigned tR, tG, tB, tA; \ |
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378 tA = 255 - sA; \ |
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379 tR = 1 + (sR * sA) + (dR * tA); \ |
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380 dR = (tR + (tR >> 8)) >> 8; \ |
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381 tG = 1 + (sG * sA) + (dG * tA); \ |
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382 dG = (tG + (tG >> 8)) >> 8; \ |
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383 tB = 1 + (sB * sA) + (dB * tA); \ |
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384 dB = (tB + (tB >> 8)) >> 8; \ |
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385 } while(0) |
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386 |
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387 |
| 0 | 388 /* This is a very useful loop for optimizing blitters */ |
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389 #if defined(_MSC_VER) && (_MSC_VER == 1300) |
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390 /* There's a bug in the Visual C++ 7 optimizer when compiling this code */ |
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391 #else |
| 0 | 392 #define USE_DUFFS_LOOP |
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393 #endif |
| 0 | 394 #ifdef USE_DUFFS_LOOP |
| 395 | |
| 396 /* 8-times unrolled loop */ | |
| 397 #define DUFFS_LOOP8(pixel_copy_increment, width) \ | |
| 398 { int n = (width+7)/8; \ | |
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399 switch (width & 7) { \ |
| 0 | 400 case 0: do { pixel_copy_increment; \ |
| 401 case 7: pixel_copy_increment; \ | |
| 402 case 6: pixel_copy_increment; \ | |
| 403 case 5: pixel_copy_increment; \ | |
| 404 case 4: pixel_copy_increment; \ | |
| 405 case 3: pixel_copy_increment; \ | |
| 406 case 2: pixel_copy_increment; \ | |
| 407 case 1: pixel_copy_increment; \ | |
| 408 } while ( --n > 0 ); \ | |
| 409 } \ | |
| 410 } | |
| 411 | |
| 412 /* 4-times unrolled loop */ | |
| 413 #define DUFFS_LOOP4(pixel_copy_increment, width) \ | |
| 414 { int n = (width+3)/4; \ | |
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From: "Markus F.X.J. Oberhumer"
Sam Lantinga <slouken@lokigames.com>
parents:
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changeset
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415 switch (width & 3) { \ |
| 0 | 416 case 0: do { pixel_copy_increment; \ |
| 417 case 3: pixel_copy_increment; \ | |
| 418 case 2: pixel_copy_increment; \ | |
| 419 case 1: pixel_copy_increment; \ | |
| 420 } while ( --n > 0 ); \ | |
| 421 } \ | |
| 422 } | |
| 423 | |
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Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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424 /* 2 - times unrolled loop */ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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425 #define DUFFS_LOOP_DOUBLE2(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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426 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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427 { int n, w = width; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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428 if( w & 1 ) { \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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429 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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430 w--; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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431 } \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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432 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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433 n = ( w + 2) / 4; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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434 switch( 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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435 case 0: do { 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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436 case 2: 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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437 } while ( --n > 0 ); \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
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438 } \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
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439 } \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
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440 } |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
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441 |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
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442 /* 2 - times unrolled loop 4 pixels */ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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443 #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>
parents:
553
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444 double_pixel_copy_increment, \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
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445 quatro_pixel_copy_increment, width) \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
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446 { int n, w = width; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
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447 if(w & 1) { \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
diff
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448 pixel_copy_increment; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
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449 w--; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
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450 } \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
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451 if(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 double_pixel_copy_increment; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
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453 w -= 2; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
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454 } \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
diff
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455 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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456 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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457 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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458 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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459 case 4: quatro_pixel_copy_increment; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
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460 } while ( --n > 0 ); \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
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461 } \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
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462 } \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
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463 } |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
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464 |
| 0 | 465 /* Use the 8-times version of the loop by default */ |
| 466 #define DUFFS_LOOP(pixel_copy_increment, width) \ | |
| 467 DUFFS_LOOP8(pixel_copy_increment, width) | |
| 468 | |
| 469 #else | |
| 470 | |
| 471 /* Don't use Duff's device to unroll loops */ | |
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689
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Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
diff
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472 #define DUFFS_LOOP_DOUBLE2(pixel_copy_increment, \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
diff
changeset
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473 double_pixel_copy_increment, width) \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
diff
changeset
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474 { int n = width; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
diff
changeset
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475 if( n & 1 ) { \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
diff
changeset
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476 pixel_copy_increment; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
diff
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477 n--; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
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478 } \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
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479 n=n>>1; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
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480 for(; n > 0; --n) { \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
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481 double_pixel_copy_increment; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
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482 } \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
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483 } |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
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484 |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
diff
changeset
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485 /* 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>
parents:
553
diff
changeset
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486 #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>
parents:
553
diff
changeset
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487 double_pixel_copy_increment, \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
diff
changeset
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488 quatro_pixel_copy_increment, width) \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
diff
changeset
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489 { int n = width; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
diff
changeset
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490 if(n & 1) { \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
diff
changeset
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491 pixel_copy_increment; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
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492 n--; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
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493 } \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
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494 if(n & 2) { \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
diff
changeset
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495 double_pixel_copy_increment; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
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496 n -= 2; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
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497 } \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
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498 n=n>>2; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
diff
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499 for(; n > 0; --n) { \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
diff
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500 quatro_pixel_copy_increment; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
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501 } \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
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502 } |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
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503 |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
diff
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504 /* Don't use Duff's device to unroll loops */ |
| 0 | 505 #define DUFFS_LOOP(pixel_copy_increment, width) \ |
| 506 { int n; \ | |
| 507 for ( n=width; n > 0; --n ) { \ | |
| 508 pixel_copy_increment; \ | |
| 509 } \ | |
| 510 } | |
| 511 #define DUFFS_LOOP8(pixel_copy_increment, width) \ | |
| 512 DUFFS_LOOP(pixel_copy_increment, width) | |
| 513 #define DUFFS_LOOP4(pixel_copy_increment, width) \ | |
| 514 DUFFS_LOOP(pixel_copy_increment, width) | |
| 515 | |
| 516 #endif /* USE_DUFFS_LOOP */ | |
| 517 | |
| 518 /* Prevent Visual C++ 6.0 from printing out stupid warnings */ | |
| 519 #if defined(_MSC_VER) && (_MSC_VER >= 600) | |
| 520 #pragma warning(disable: 4550) | |
| 521 #endif | |
| 522 | |
| 523 #endif /* _SDL_blit_h */ | |
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c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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524 /* vi: set ts=4 sw=4 expandtab: */ |