Mercurial > sdl-ios-xcode
annotate src/video/SDL_blit.h @ 2262:bee005ace1bf
Work in progress: merging new texture features into SDL blit system
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Fri, 17 Aug 2007 06:21:58 +0000 |
| parents | c20476d7d7b3 |
| children | 900c35d8e8fd |
| 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 | |
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27 #ifdef __MMX__ |
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28 #include <mmintrin.h> |
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29 #endif |
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30 #ifdef __3dNOW__ |
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31 #include <mm3dnow.h> |
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32 #endif |
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33 #ifdef __SSE__ |
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34 #include <xmmintrin.h> |
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35 #endif |
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36 #ifdef __SSE2__ |
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37 #include <emmintrin.h> |
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38 #endif |
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39 |
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40 #include "SDL_cpuinfo.h" |
| 0 | 41 #include "SDL_endian.h" |
| 42 | |
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43 /* SDL blit copy flags */ |
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44 #define SDL_COPY_MODULATE_COLOR 0x0001 |
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45 #define SDL_COPY_MODULATE_ALPHA 0x0002 |
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46 #define SDL_COPY_MASK 0x0010 |
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47 #define SDL_COPY_BLEND 0x0020 |
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48 #define SDL_COPY_ADD 0x0040 |
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49 #define SDL_COPY_MOD 0x0080 |
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50 #define SDL_COPY_COLORKEY 0x0100 |
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51 #define SDL_COPY_NEAREST 0x0200 |
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52 |
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53 /* SDL blit CPU flags */ |
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54 #define SDL_CPU_ANY 0x0000 |
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55 #define SDL_CPU_MMX 0x0001 |
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56 #define SDL_CPU_3DNOW 0x0002 |
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57 #define SDL_CPU_SSE 0x0004 |
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58 #define SDL_CPU_SSE2 0x0008 |
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59 #define SDL_CPU_ALTIVEC_PREFETCH 0x0010 |
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60 #define SDL_CPU_ALTIVEC_NOPREFETCH 0x0020 |
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61 |
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62 typedef struct { |
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63 Uint8 *src; |
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64 int src_w, src_h; |
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65 int src_pitch; |
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66 Uint8 *dst; |
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67 int dst_w, dst_h; |
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68 int dst_pitch; |
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69 SDL_PixelFormat *src_fmt; |
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70 SDL_PixelFormat *dst_fmt; |
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71 Uint8 *table; |
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72 int flags; |
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73 Uint32 colorkey; |
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74 Uint8 r, g, b, a; |
| 0 | 75 } SDL_BlitInfo; |
| 76 | |
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77 typedef void (SDLCALL * SDL_BlitFunc)(SDL_BlitInfo *info); |
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78 |
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79 typedef struct { |
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80 Uint32 src_format; |
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81 Uint32 dst_format; |
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82 int flags; |
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83 int cpu; |
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84 SDL_BlitFunc func; |
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85 } SDL_BlitFuncEntry; |
| 0 | 86 |
| 87 /* Blit mapping definition */ | |
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88 typedef struct SDL_BlitMap |
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89 { |
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90 SDL_Surface *dst; |
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91 int identity; |
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92 SDL_blit blit; |
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93 void *data; |
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94 SDL_BlitInfo info; |
| 0 | 95 |
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96 /* the version count matches the destination; mismatch indicates |
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97 an invalid mapping */ |
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98 unsigned int format_version; |
| 0 | 99 } SDL_BlitMap; |
| 100 | |
| 101 /* Functions found in SDL_blit.c */ | |
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102 extern int SDL_CalculateBlit(SDL_Surface * surface); |
| 0 | 103 |
| 104 /* | |
| 105 * Useful macros for blitting routines | |
| 106 */ | |
| 107 | |
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108 #if defined(__GNUC__) |
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109 #define DECLARE_ALIGNED(t,v,a) t __attribute__((aligned(a))) v |
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110 #elif defined(_MSC_VER) |
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111 #define DECLARE_ALIGNED(t,v,a) __declspec(align(a)) t v |
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112 #else |
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113 #define DECLARE_ALIGNED(t,v,a) t v |
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114 #endif |
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115 |
| 0 | 116 #define FORMAT_EQUAL(A, B) \ |
| 117 ((A)->BitsPerPixel == (B)->BitsPerPixel \ | |
| 118 && ((A)->Rmask == (B)->Rmask) && ((A)->Amask == (B)->Amask)) | |
| 119 | |
| 120 /* Load pixel of the specified format from a buffer and get its R-G-B values */ | |
| 121 /* FIXME: rescale values to 0..255 here? */ | |
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122 #define RGB_FROM_PIXEL(Pixel, fmt, r, g, b) \ |
| 0 | 123 { \ |
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124 r = (((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss); \ |
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125 g = (((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss); \ |
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126 b = (((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss); \ |
| 0 | 127 } |
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128 #define RGB_FROM_RGB565(Pixel, r, g, b) \ |
| 0 | 129 { \ |
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130 r = (((Pixel&0xF800)>>11)<<3); \ |
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131 g = (((Pixel&0x07E0)>>5)<<2); \ |
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132 b = ((Pixel&0x001F)<<3); \ |
| 0 | 133 } |
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134 #define RGB_FROM_RGB555(Pixel, r, g, b) \ |
| 0 | 135 { \ |
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136 r = (((Pixel&0x7C00)>>10)<<3); \ |
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137 g = (((Pixel&0x03E0)>>5)<<3); \ |
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138 b = ((Pixel&0x001F)<<3); \ |
| 0 | 139 } |
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140 #define RGB_FROM_RGB888(Pixel, r, g, b) \ |
| 0 | 141 { \ |
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142 r = ((Pixel&0xFF0000)>>16); \ |
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143 g = ((Pixel&0xFF00)>>8); \ |
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144 b = (Pixel&0xFF); \ |
| 0 | 145 } |
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146 #define RETRIEVE_RGB_PIXEL(buf, bpp, Pixel) \ |
| 0 | 147 do { \ |
| 148 switch (bpp) { \ | |
| 149 case 2: \ | |
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150 Pixel = *((Uint16 *)(buf)); \ |
| 0 | 151 break; \ |
| 152 \ | |
| 153 case 3: { \ | |
| 154 Uint8 *B = (Uint8 *)(buf); \ | |
| 155 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ | |
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156 Pixel = B[0] + (B[1] << 8) + (B[2] << 16); \ |
| 0 | 157 } else { \ |
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158 Pixel = (B[0] << 16) + (B[1] << 8) + B[2]; \ |
| 0 | 159 } \ |
| 160 } \ | |
| 161 break; \ | |
| 162 \ | |
| 163 case 4: \ | |
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164 Pixel = *((Uint32 *)(buf)); \ |
| 0 | 165 break; \ |
| 166 \ | |
| 167 default: \ | |
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168 Pixel = 0; /* appease gcc */ \ |
| 0 | 169 break; \ |
| 170 } \ | |
| 171 } while(0) | |
| 172 | |
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173 #define DISEMBLE_RGB(buf, bpp, fmt, Pixel, r, g, b) \ |
| 0 | 174 do { \ |
| 175 switch (bpp) { \ | |
| 176 case 2: \ | |
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177 Pixel = *((Uint16 *)(buf)); \ |
| 0 | 178 break; \ |
| 179 \ | |
| 180 case 3: { \ | |
| 181 Uint8 *B = (Uint8 *)buf; \ | |
| 182 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ | |
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183 Pixel = B[0] + (B[1] << 8) + (B[2] << 16); \ |
| 0 | 184 } else { \ |
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185 Pixel = (B[0] << 16) + (B[1] << 8) + B[2]; \ |
| 0 | 186 } \ |
| 187 } \ | |
| 188 break; \ | |
| 189 \ | |
| 190 case 4: \ | |
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191 Pixel = *((Uint32 *)(buf)); \ |
| 0 | 192 break; \ |
| 193 \ | |
| 194 default: \ | |
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195 Pixel = 0; /* prevent gcc from complaining */ \ |
| 0 | 196 break; \ |
| 197 } \ | |
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198 RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \ |
| 0 | 199 } while(0) |
| 200 | |
| 201 /* Assemble R-G-B values into a specified pixel format and store them */ | |
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202 #define PIXEL_FROM_RGB(Pixel, fmt, r, g, b) \ |
| 0 | 203 { \ |
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204 Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \ |
| 0 | 205 ((g>>fmt->Gloss)<<fmt->Gshift)| \ |
| 206 ((b>>fmt->Bloss)<<fmt->Bshift); \ | |
| 207 } | |
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208 #define RGB565_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 209 { \ |
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210 Pixel = ((r>>3)<<11)|((g>>2)<<5)|(b>>3); \ |
| 0 | 211 } |
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212 #define RGB555_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 213 { \ |
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214 Pixel = ((r>>3)<<10)|((g>>3)<<5)|(b>>3); \ |
| 0 | 215 } |
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216 #define RGB888_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 217 { \ |
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218 Pixel = (r<<16)|(g<<8)|b; \ |
| 0 | 219 } |
| 220 #define ASSEMBLE_RGB(buf, bpp, fmt, r, g, b) \ | |
| 221 { \ | |
| 222 switch (bpp) { \ | |
| 223 case 2: { \ | |
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224 Uint16 Pixel; \ |
| 0 | 225 \ |
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226 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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227 *((Uint16 *)(buf)) = Pixel; \ |
| 0 | 228 } \ |
| 229 break; \ | |
| 230 \ | |
| 231 case 3: { \ | |
| 232 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ | |
| 233 *((buf)+fmt->Rshift/8) = r; \ | |
| 234 *((buf)+fmt->Gshift/8) = g; \ | |
| 235 *((buf)+fmt->Bshift/8) = b; \ | |
| 236 } else { \ | |
| 237 *((buf)+2-fmt->Rshift/8) = r; \ | |
| 238 *((buf)+2-fmt->Gshift/8) = g; \ | |
| 239 *((buf)+2-fmt->Bshift/8) = b; \ | |
| 240 } \ | |
| 241 } \ | |
| 242 break; \ | |
| 243 \ | |
| 244 case 4: { \ | |
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245 Uint32 Pixel; \ |
| 0 | 246 \ |
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247 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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248 *((Uint32 *)(buf)) = Pixel; \ |
| 0 | 249 } \ |
| 250 break; \ | |
| 251 } \ | |
| 252 } | |
| 253 #define ASSEMBLE_RGB_AMASK(buf, bpp, fmt, r, g, b, Amask) \ | |
| 254 { \ | |
| 255 switch (bpp) { \ | |
| 256 case 2: { \ | |
| 257 Uint16 *bufp; \ | |
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258 Uint16 Pixel; \ |
| 0 | 259 \ |
| 260 bufp = (Uint16 *)buf; \ | |
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261 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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262 *bufp = Pixel | (*bufp & Amask); \ |
| 0 | 263 } \ |
| 264 break; \ | |
| 265 \ | |
| 266 case 3: { \ | |
| 267 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ | |
| 268 *((buf)+fmt->Rshift/8) = r; \ | |
| 269 *((buf)+fmt->Gshift/8) = g; \ | |
| 270 *((buf)+fmt->Bshift/8) = b; \ | |
| 271 } else { \ | |
| 272 *((buf)+2-fmt->Rshift/8) = r; \ | |
| 273 *((buf)+2-fmt->Gshift/8) = g; \ | |
| 274 *((buf)+2-fmt->Bshift/8) = b; \ | |
| 275 } \ | |
| 276 } \ | |
| 277 break; \ | |
| 278 \ | |
| 279 case 4: { \ | |
| 280 Uint32 *bufp; \ | |
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281 Uint32 Pixel; \ |
| 0 | 282 \ |
| 283 bufp = (Uint32 *)buf; \ | |
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284 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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285 *bufp = Pixel | (*bufp & Amask); \ |
| 0 | 286 } \ |
| 287 break; \ | |
| 288 } \ | |
| 289 } | |
| 290 | |
| 291 /* FIXME: Should we rescale alpha into 0..255 here? */ | |
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292 #define RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a) \ |
| 0 | 293 { \ |
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294 r = ((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss; \ |
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295 g = ((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss; \ |
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296 b = ((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss; \ |
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297 a = ((Pixel&fmt->Amask)>>fmt->Ashift)<<fmt->Aloss; \ |
| 0 | 298 } |
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299 #define RGBA_FROM_8888(Pixel, fmt, r, g, b, a) \ |
| 0 | 300 { \ |
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301 r = (Pixel&fmt->Rmask)>>fmt->Rshift; \ |
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302 g = (Pixel&fmt->Gmask)>>fmt->Gshift; \ |
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303 b = (Pixel&fmt->Bmask)>>fmt->Bshift; \ |
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304 a = (Pixel&fmt->Amask)>>fmt->Ashift; \ |
| 0 | 305 } |
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306 #define RGBA_FROM_RGBA8888(Pixel, r, g, b, a) \ |
| 0 | 307 { \ |
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308 r = (Pixel>>24); \ |
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309 g = ((Pixel>>16)&0xFF); \ |
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310 b = ((Pixel>>8)&0xFF); \ |
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311 a = (Pixel&0xFF); \ |
| 0 | 312 } |
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313 #define RGBA_FROM_ARGB8888(Pixel, r, g, b, a) \ |
| 0 | 314 { \ |
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315 r = ((Pixel>>16)&0xFF); \ |
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316 g = ((Pixel>>8)&0xFF); \ |
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317 b = (Pixel&0xFF); \ |
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318 a = (Pixel>>24); \ |
| 0 | 319 } |
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320 #define RGBA_FROM_ABGR8888(Pixel, r, g, b, a) \ |
| 0 | 321 { \ |
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322 r = (Pixel&0xFF); \ |
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323 g = ((Pixel>>8)&0xFF); \ |
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324 b = ((Pixel>>16)&0xFF); \ |
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325 a = (Pixel>>24); \ |
| 0 | 326 } |
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327 #define DISEMBLE_RGBA(buf, bpp, fmt, Pixel, r, g, b, a) \ |
| 0 | 328 do { \ |
| 329 switch (bpp) { \ | |
| 330 case 2: \ | |
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331 Pixel = *((Uint16 *)(buf)); \ |
| 0 | 332 break; \ |
| 333 \ | |
| 334 case 3: {/* FIXME: broken code (no alpha) */ \ | |
| 335 Uint8 *b = (Uint8 *)buf; \ | |
| 336 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ | |
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337 Pixel = b[0] + (b[1] << 8) + (b[2] << 16); \ |
| 0 | 338 } else { \ |
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339 Pixel = (b[0] << 16) + (b[1] << 8) + b[2]; \ |
| 0 | 340 } \ |
| 341 } \ | |
| 342 break; \ | |
| 343 \ | |
| 344 case 4: \ | |
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345 Pixel = *((Uint32 *)(buf)); \ |
| 0 | 346 break; \ |
| 347 \ | |
| 348 default: \ | |
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349 Pixel = 0; /* stop gcc complaints */ \ |
| 0 | 350 break; \ |
| 351 } \ | |
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352 RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a); \ |
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353 Pixel &= ~fmt->Amask; \ |
| 0 | 354 } while(0) |
| 355 | |
| 356 /* FIXME: this isn't correct, especially for Alpha (maximum != 255) */ | |
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357 #define PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a) \ |
| 0 | 358 { \ |
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359 Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \ |
| 0 | 360 ((g>>fmt->Gloss)<<fmt->Gshift)| \ |
| 361 ((b>>fmt->Bloss)<<fmt->Bshift)| \ | |
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362 ((a>>fmt->Aloss)<<fmt->Ashift); \ |
| 0 | 363 } |
| 364 #define ASSEMBLE_RGBA(buf, bpp, fmt, r, g, b, a) \ | |
| 365 { \ | |
| 366 switch (bpp) { \ | |
| 367 case 2: { \ | |
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368 Uint16 Pixel; \ |
| 0 | 369 \ |
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370 PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a); \ |
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371 *((Uint16 *)(buf)) = Pixel; \ |
| 0 | 372 } \ |
| 373 break; \ | |
| 374 \ | |
| 375 case 3: { /* FIXME: broken code (no alpha) */ \ | |
| 376 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ | |
| 377 *((buf)+fmt->Rshift/8) = r; \ | |
| 378 *((buf)+fmt->Gshift/8) = g; \ | |
| 379 *((buf)+fmt->Bshift/8) = b; \ | |
| 380 } else { \ | |
| 381 *((buf)+2-fmt->Rshift/8) = r; \ | |
| 382 *((buf)+2-fmt->Gshift/8) = g; \ | |
| 383 *((buf)+2-fmt->Bshift/8) = b; \ | |
| 384 } \ | |
| 385 } \ | |
| 386 break; \ | |
| 387 \ | |
| 388 case 4: { \ | |
|
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389 Uint32 Pixel; \ |
| 0 | 390 \ |
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391 PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a); \ |
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392 *((Uint32 *)(buf)) = Pixel; \ |
| 0 | 393 } \ |
| 394 break; \ | |
| 395 } \ | |
| 396 } | |
| 397 | |
|
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398 /* Blend the RGB values of two Pixels based on a source alpha value */ |
| 0 | 399 #define ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB) \ |
| 400 do { \ | |
| 401 dR = (((sR-dR)*(A))>>8)+dR; \ | |
| 402 dG = (((sG-dG)*(A))>>8)+dG; \ | |
| 403 dB = (((sB-dB)*(A))>>8)+dB; \ | |
| 404 } while(0) | |
| 405 | |
|
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406 /* Blend the RGB values of two Pixels based on a source alpha value */ |
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407 #define ACCURATE_ALPHA_BLEND(sR, sG, sB, sA, dR, dG, dB) \ |
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408 do { \ |
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409 unsigned tR, tG, tB, tA; \ |
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410 tA = 255 - sA; \ |
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411 tR = 1 + (sR * sA) + (dR * tA); \ |
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412 dR = (tR + (tR >> 8)) >> 8; \ |
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413 tG = 1 + (sG * sA) + (dG * tA); \ |
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414 dG = (tG + (tG >> 8)) >> 8; \ |
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415 tB = 1 + (sB * sA) + (dB * tA); \ |
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416 dB = (tB + (tB >> 8)) >> 8; \ |
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417 } while(0) |
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418 |
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419 |
| 0 | 420 /* This is a very useful loop for optimizing blitters */ |
|
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421 #if defined(_MSC_VER) && (_MSC_VER == 1300) |
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422 /* There's a bug in the Visual C++ 7 optimizer when compiling this code */ |
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423 #else |
| 0 | 424 #define USE_DUFFS_LOOP |
|
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425 #endif |
| 0 | 426 #ifdef USE_DUFFS_LOOP |
| 427 | |
| 428 /* 8-times unrolled loop */ | |
| 429 #define DUFFS_LOOP8(pixel_copy_increment, width) \ | |
| 430 { int n = (width+7)/8; \ | |
|
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431 switch (width & 7) { \ |
| 0 | 432 case 0: do { pixel_copy_increment; \ |
| 433 case 7: pixel_copy_increment; \ | |
| 434 case 6: pixel_copy_increment; \ | |
| 435 case 5: pixel_copy_increment; \ | |
| 436 case 4: pixel_copy_increment; \ | |
| 437 case 3: pixel_copy_increment; \ | |
| 438 case 2: pixel_copy_increment; \ | |
| 439 case 1: pixel_copy_increment; \ | |
| 440 } while ( --n > 0 ); \ | |
| 441 } \ | |
| 442 } | |
| 443 | |
| 444 /* 4-times unrolled loop */ | |
| 445 #define DUFFS_LOOP4(pixel_copy_increment, width) \ | |
| 446 { int n = (width+3)/4; \ | |
|
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447 switch (width & 3) { \ |
| 0 | 448 case 0: do { pixel_copy_increment; \ |
| 449 case 3: pixel_copy_increment; \ | |
| 450 case 2: pixel_copy_increment; \ | |
| 451 case 1: pixel_copy_increment; \ | |
| 452 } while ( --n > 0 ); \ | |
| 453 } \ | |
| 454 } | |
| 455 | |
|
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456 /* 2 - times unrolled loop */ |
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457 #define DUFFS_LOOP_DOUBLE2(pixel_copy_increment, \ |
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458 double_pixel_copy_increment, width) \ |
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459 { int n, w = width; \ |
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460 if( w & 1 ) { \ |
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461 pixel_copy_increment; \ |
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462 w--; \ |
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463 } \ |
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464 if ( w > 0 ) { \ |
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465 n = ( w + 2) / 4; \ |
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466 switch( w & 2 ) { \ |
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467 case 0: do { double_pixel_copy_increment; \ |
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468 case 2: double_pixel_copy_increment; \ |
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469 } while ( --n > 0 ); \ |
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470 } \ |
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471 } \ |
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472 } |
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473 |
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474 /* 2 - times unrolled loop 4 pixels */ |
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475 #define DUFFS_LOOP_QUATRO2(pixel_copy_increment, \ |
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476 double_pixel_copy_increment, \ |
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477 quatro_pixel_copy_increment, width) \ |
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478 { int n, w = width; \ |
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479 if(w & 1) { \ |
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480 pixel_copy_increment; \ |
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481 w--; \ |
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482 } \ |
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483 if(w & 2) { \ |
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484 double_pixel_copy_increment; \ |
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485 w -= 2; \ |
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486 } \ |
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487 if ( w > 0 ) { \ |
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488 n = ( w + 7 ) / 8; \ |
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489 switch( w & 4 ) { \ |
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490 case 0: do { quatro_pixel_copy_increment; \ |
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491 case 4: quatro_pixel_copy_increment; \ |
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492 } while ( --n > 0 ); \ |
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493 } \ |
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494 } \ |
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495 } |
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496 |
| 0 | 497 /* Use the 8-times version of the loop by default */ |
| 498 #define DUFFS_LOOP(pixel_copy_increment, width) \ | |
| 499 DUFFS_LOOP8(pixel_copy_increment, width) | |
| 500 | |
| 501 #else | |
| 502 | |
| 503 /* Don't use Duff's device to unroll loops */ | |
|
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504 #define DUFFS_LOOP_DOUBLE2(pixel_copy_increment, \ |
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505 double_pixel_copy_increment, width) \ |
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506 { int n = width; \ |
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507 if( n & 1 ) { \ |
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508 pixel_copy_increment; \ |
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509 n--; \ |
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510 } \ |
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511 n=n>>1; \ |
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512 for(; n > 0; --n) { \ |
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513 double_pixel_copy_increment; \ |
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514 } \ |
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515 } |
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516 |
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517 /* Don't use Duff's device to unroll loops */ |
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518 #define DUFFS_LOOP_QUATRO2(pixel_copy_increment, \ |
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519 double_pixel_copy_increment, \ |
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520 quatro_pixel_copy_increment, width) \ |
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521 { int n = width; \ |
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522 if(n & 1) { \ |
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523 pixel_copy_increment; \ |
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524 n--; \ |
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525 } \ |
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526 if(n & 2) { \ |
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527 double_pixel_copy_increment; \ |
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528 n -= 2; \ |
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529 } \ |
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530 n=n>>2; \ |
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531 for(; n > 0; --n) { \ |
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532 quatro_pixel_copy_increment; \ |
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533 } \ |
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534 } |
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535 |
|
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536 /* Don't use Duff's device to unroll loops */ |
| 0 | 537 #define DUFFS_LOOP(pixel_copy_increment, width) \ |
| 538 { int n; \ | |
| 539 for ( n=width; n > 0; --n ) { \ | |
| 540 pixel_copy_increment; \ | |
| 541 } \ | |
| 542 } | |
| 543 #define DUFFS_LOOP8(pixel_copy_increment, width) \ | |
| 544 DUFFS_LOOP(pixel_copy_increment, width) | |
| 545 #define DUFFS_LOOP4(pixel_copy_increment, width) \ | |
| 546 DUFFS_LOOP(pixel_copy_increment, width) | |
| 547 | |
| 548 #endif /* USE_DUFFS_LOOP */ | |
| 549 | |
| 550 /* Prevent Visual C++ 6.0 from printing out stupid warnings */ | |
| 551 #if defined(_MSC_VER) && (_MSC_VER >= 600) | |
| 552 #pragma warning(disable: 4550) | |
| 553 #endif | |
| 554 | |
| 555 #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>
parents:
1402
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changeset
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556 /* vi: set ts=4 sw=4 expandtab: */ |