Mercurial > sdl-ios-xcode
annotate src/video/SDL_blit.h @ 2250:e1d228456537
Fixed a few compiler warnings.
Added SDL_blit_copy.c to the Visual C++ project
The SSE and MMX intrinsics don't compile on Visual Studio yet...
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Thu, 16 Aug 2007 06:20:51 +0000 |
| parents | 5a58b57b6724 |
| children | 292bee385630 |
| 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 __SSE__ |
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31 #include <xmmintrin.h> |
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32 #endif |
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33 |
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34 #include "SDL_cpuinfo.h" |
| 0 | 35 #include "SDL_endian.h" |
| 36 | |
| 37 /* The structure passed to the low level blit functions */ | |
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38 typedef struct |
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39 { |
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40 Uint8 *s_pixels; |
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41 int s_width; |
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42 int s_height; |
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43 int s_skip; |
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44 Uint8 *d_pixels; |
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45 int d_width; |
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46 int d_height; |
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47 int d_skip; |
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48 void *aux_data; |
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49 SDL_PixelFormat *src; |
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50 Uint8 *table; |
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51 SDL_PixelFormat *dst; |
| 0 | 52 } SDL_BlitInfo; |
| 53 | |
| 54 /* The type definition for the low level blit functions */ | |
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55 typedef void (*SDL_loblit) (SDL_BlitInfo * info); |
| 0 | 56 |
| 57 /* This is the private info structure for software accelerated blits */ | |
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58 struct private_swaccel |
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59 { |
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60 SDL_loblit blit; |
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61 void *aux_data; |
| 0 | 62 }; |
| 63 | |
| 64 /* Blit mapping definition */ | |
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65 typedef struct SDL_BlitMap |
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66 { |
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67 SDL_Surface *dst; |
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68 int identity; |
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69 Uint8 *table; |
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70 SDL_blit sw_blit; |
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71 struct private_swaccel *sw_data; |
| 0 | 72 |
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73 /* the version count matches the destination; mismatch indicates |
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74 an invalid mapping */ |
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75 unsigned int format_version; |
| 0 | 76 } SDL_BlitMap; |
| 77 | |
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78 #define SDL_BLIT_ANY 0x00000000 |
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79 #define SDL_BLIT_MMX 0x00000001 |
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80 #define SDL_BLIT_SSE 0x00000002 |
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81 #define SDL_BLIT_ALTIVEC_PREFETCH 0x00000004 |
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82 #define SDL_BLIT_ALTIVEC_NOPREFETCH 0x00000008 |
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83 |
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84 typedef struct SDL_BlitEntry |
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85 { |
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86 Uint32 features; |
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87 SDL_loblit blit; |
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88 } SDL_BlitEntry; |
| 0 | 89 |
| 90 /* Functions found in SDL_blit.c */ | |
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91 extern int SDL_CalculateBlit(SDL_Surface * surface); |
| 0 | 92 |
| 93 /* Functions found in SDL_blit_{0,1,N,A}.c */ | |
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94 extern SDL_loblit SDL_CalculateBlit0(SDL_Surface * surface, int complex); |
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95 extern SDL_loblit SDL_CalculateBlit1(SDL_Surface * surface, int complex); |
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96 extern SDL_loblit SDL_CalculateBlitN(SDL_Surface * surface, int complex); |
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97 extern SDL_loblit SDL_CalculateAlphaBlit(SDL_Surface * surface, int complex); |
| 0 | 98 |
| 99 /* | |
| 100 * Useful macros for blitting routines | |
| 101 */ | |
| 102 | |
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103 #if defined(__GNUC__) |
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104 #define DECLARE_ALIGNED(t,v,a) t __attribute__((aligned(a))) v |
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105 #elif defined(_MSC_VER) |
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106 #define DECLARE_ALIGNED(t,v,a) t __declspec(align(a)) v |
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107 #else |
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108 #define DECLARE_ALIGNED(t,v,a) t v |
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109 #endif |
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110 |
| 0 | 111 #define FORMAT_EQUAL(A, B) \ |
| 112 ((A)->BitsPerPixel == (B)->BitsPerPixel \ | |
| 113 && ((A)->Rmask == (B)->Rmask) && ((A)->Amask == (B)->Amask)) | |
| 114 | |
| 115 /* Load pixel of the specified format from a buffer and get its R-G-B values */ | |
| 116 /* FIXME: rescale values to 0..255 here? */ | |
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117 #define RGB_FROM_PIXEL(Pixel, fmt, r, g, b) \ |
| 0 | 118 { \ |
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119 r = (((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss); \ |
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120 g = (((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss); \ |
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121 b = (((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss); \ |
| 0 | 122 } |
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123 #define RGB_FROM_RGB565(Pixel, r, g, b) \ |
| 0 | 124 { \ |
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125 r = (((Pixel&0xF800)>>11)<<3); \ |
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126 g = (((Pixel&0x07E0)>>5)<<2); \ |
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127 b = ((Pixel&0x001F)<<3); \ |
| 0 | 128 } |
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129 #define RGB_FROM_RGB555(Pixel, r, g, b) \ |
| 0 | 130 { \ |
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131 r = (((Pixel&0x7C00)>>10)<<3); \ |
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132 g = (((Pixel&0x03E0)>>5)<<3); \ |
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133 b = ((Pixel&0x001F)<<3); \ |
| 0 | 134 } |
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135 #define RGB_FROM_RGB888(Pixel, r, g, b) \ |
| 0 | 136 { \ |
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137 r = ((Pixel&0xFF0000)>>16); \ |
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138 g = ((Pixel&0xFF00)>>8); \ |
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139 b = (Pixel&0xFF); \ |
| 0 | 140 } |
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141 #define RETRIEVE_RGB_PIXEL(buf, bpp, Pixel) \ |
| 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; /* appease gcc */ \ |
| 0 | 164 break; \ |
| 165 } \ | |
| 166 } while(0) | |
| 167 | |
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168 #define DISEMBLE_RGB(buf, bpp, fmt, Pixel, r, g, b) \ |
| 0 | 169 do { \ |
| 170 switch (bpp) { \ | |
| 171 case 2: \ | |
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172 Pixel = *((Uint16 *)(buf)); \ |
| 0 | 173 break; \ |
| 174 \ | |
| 175 case 3: { \ | |
| 176 Uint8 *B = (Uint8 *)buf; \ | |
| 177 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ | |
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178 Pixel = B[0] + (B[1] << 8) + (B[2] << 16); \ |
| 0 | 179 } else { \ |
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180 Pixel = (B[0] << 16) + (B[1] << 8) + B[2]; \ |
| 0 | 181 } \ |
| 182 } \ | |
| 183 break; \ | |
| 184 \ | |
| 185 case 4: \ | |
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186 Pixel = *((Uint32 *)(buf)); \ |
| 0 | 187 break; \ |
| 188 \ | |
| 189 default: \ | |
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190 Pixel = 0; /* prevent gcc from complaining */ \ |
| 0 | 191 break; \ |
| 192 } \ | |
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193 RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \ |
| 0 | 194 } while(0) |
| 195 | |
| 196 /* Assemble R-G-B values into a specified pixel format and store them */ | |
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197 #define PIXEL_FROM_RGB(Pixel, fmt, r, g, b) \ |
| 0 | 198 { \ |
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199 Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \ |
| 0 | 200 ((g>>fmt->Gloss)<<fmt->Gshift)| \ |
| 201 ((b>>fmt->Bloss)<<fmt->Bshift); \ | |
| 202 } | |
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203 #define RGB565_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 204 { \ |
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205 Pixel = ((r>>3)<<11)|((g>>2)<<5)|(b>>3); \ |
| 0 | 206 } |
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207 #define RGB555_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 208 { \ |
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209 Pixel = ((r>>3)<<10)|((g>>3)<<5)|(b>>3); \ |
| 0 | 210 } |
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211 #define RGB888_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 212 { \ |
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213 Pixel = (r<<16)|(g<<8)|b; \ |
| 0 | 214 } |
| 215 #define ASSEMBLE_RGB(buf, bpp, fmt, r, g, b) \ | |
| 216 { \ | |
| 217 switch (bpp) { \ | |
| 218 case 2: { \ | |
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219 Uint16 Pixel; \ |
| 0 | 220 \ |
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221 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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222 *((Uint16 *)(buf)) = Pixel; \ |
| 0 | 223 } \ |
| 224 break; \ | |
| 225 \ | |
| 226 case 3: { \ | |
| 227 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ | |
| 228 *((buf)+fmt->Rshift/8) = r; \ | |
| 229 *((buf)+fmt->Gshift/8) = g; \ | |
| 230 *((buf)+fmt->Bshift/8) = b; \ | |
| 231 } else { \ | |
| 232 *((buf)+2-fmt->Rshift/8) = r; \ | |
| 233 *((buf)+2-fmt->Gshift/8) = g; \ | |
| 234 *((buf)+2-fmt->Bshift/8) = b; \ | |
| 235 } \ | |
| 236 } \ | |
| 237 break; \ | |
| 238 \ | |
| 239 case 4: { \ | |
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240 Uint32 Pixel; \ |
| 0 | 241 \ |
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242 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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243 *((Uint32 *)(buf)) = Pixel; \ |
| 0 | 244 } \ |
| 245 break; \ | |
| 246 } \ | |
| 247 } | |
| 248 #define ASSEMBLE_RGB_AMASK(buf, bpp, fmt, r, g, b, Amask) \ | |
| 249 { \ | |
| 250 switch (bpp) { \ | |
| 251 case 2: { \ | |
| 252 Uint16 *bufp; \ | |
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253 Uint16 Pixel; \ |
| 0 | 254 \ |
| 255 bufp = (Uint16 *)buf; \ | |
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256 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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257 *bufp = Pixel | (*bufp & Amask); \ |
| 0 | 258 } \ |
| 259 break; \ | |
| 260 \ | |
| 261 case 3: { \ | |
| 262 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ | |
| 263 *((buf)+fmt->Rshift/8) = r; \ | |
| 264 *((buf)+fmt->Gshift/8) = g; \ | |
| 265 *((buf)+fmt->Bshift/8) = b; \ | |
| 266 } else { \ | |
| 267 *((buf)+2-fmt->Rshift/8) = r; \ | |
| 268 *((buf)+2-fmt->Gshift/8) = g; \ | |
| 269 *((buf)+2-fmt->Bshift/8) = b; \ | |
| 270 } \ | |
| 271 } \ | |
| 272 break; \ | |
| 273 \ | |
| 274 case 4: { \ | |
| 275 Uint32 *bufp; \ | |
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276 Uint32 Pixel; \ |
| 0 | 277 \ |
| 278 bufp = (Uint32 *)buf; \ | |
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279 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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280 *bufp = Pixel | (*bufp & Amask); \ |
| 0 | 281 } \ |
| 282 break; \ | |
| 283 } \ | |
| 284 } | |
| 285 | |
| 286 /* FIXME: Should we rescale alpha into 0..255 here? */ | |
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287 #define RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a) \ |
| 0 | 288 { \ |
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289 r = ((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss; \ |
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290 g = ((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss; \ |
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291 b = ((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss; \ |
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292 a = ((Pixel&fmt->Amask)>>fmt->Ashift)<<fmt->Aloss; \ |
| 0 | 293 } |
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294 #define RGBA_FROM_8888(Pixel, fmt, r, g, b, a) \ |
| 0 | 295 { \ |
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296 r = (Pixel&fmt->Rmask)>>fmt->Rshift; \ |
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297 g = (Pixel&fmt->Gmask)>>fmt->Gshift; \ |
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298 b = (Pixel&fmt->Bmask)>>fmt->Bshift; \ |
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299 a = (Pixel&fmt->Amask)>>fmt->Ashift; \ |
| 0 | 300 } |
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301 #define RGBA_FROM_RGBA8888(Pixel, r, g, b, a) \ |
| 0 | 302 { \ |
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303 r = (Pixel>>24); \ |
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304 g = ((Pixel>>16)&0xFF); \ |
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305 b = ((Pixel>>8)&0xFF); \ |
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306 a = (Pixel&0xFF); \ |
| 0 | 307 } |
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308 #define RGBA_FROM_ARGB8888(Pixel, r, g, b, a) \ |
| 0 | 309 { \ |
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310 r = ((Pixel>>16)&0xFF); \ |
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311 g = ((Pixel>>8)&0xFF); \ |
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312 b = (Pixel&0xFF); \ |
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313 a = (Pixel>>24); \ |
| 0 | 314 } |
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315 #define RGBA_FROM_ABGR8888(Pixel, r, g, b, a) \ |
| 0 | 316 { \ |
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317 r = (Pixel&0xFF); \ |
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318 g = ((Pixel>>8)&0xFF); \ |
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319 b = ((Pixel>>16)&0xFF); \ |
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320 a = (Pixel>>24); \ |
| 0 | 321 } |
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322 #define DISEMBLE_RGBA(buf, bpp, fmt, Pixel, r, g, b, a) \ |
| 0 | 323 do { \ |
| 324 switch (bpp) { \ | |
| 325 case 2: \ | |
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326 Pixel = *((Uint16 *)(buf)); \ |
| 0 | 327 break; \ |
| 328 \ | |
| 329 case 3: {/* FIXME: broken code (no alpha) */ \ | |
| 330 Uint8 *b = (Uint8 *)buf; \ | |
| 331 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ | |
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332 Pixel = b[0] + (b[1] << 8) + (b[2] << 16); \ |
| 0 | 333 } else { \ |
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334 Pixel = (b[0] << 16) + (b[1] << 8) + b[2]; \ |
| 0 | 335 } \ |
| 336 } \ | |
| 337 break; \ | |
| 338 \ | |
| 339 case 4: \ | |
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340 Pixel = *((Uint32 *)(buf)); \ |
| 0 | 341 break; \ |
| 342 \ | |
| 343 default: \ | |
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344 Pixel = 0; /* stop gcc complaints */ \ |
| 0 | 345 break; \ |
| 346 } \ | |
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347 RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a); \ |
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348 Pixel &= ~fmt->Amask; \ |
| 0 | 349 } while(0) |
| 350 | |
| 351 /* FIXME: this isn't correct, especially for Alpha (maximum != 255) */ | |
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352 #define PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a) \ |
| 0 | 353 { \ |
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354 Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \ |
| 0 | 355 ((g>>fmt->Gloss)<<fmt->Gshift)| \ |
| 356 ((b>>fmt->Bloss)<<fmt->Bshift)| \ | |
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357 ((a>>fmt->Aloss)<<fmt->Ashift); \ |
| 0 | 358 } |
| 359 #define ASSEMBLE_RGBA(buf, bpp, fmt, r, g, b, a) \ | |
| 360 { \ | |
| 361 switch (bpp) { \ | |
| 362 case 2: { \ | |
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363 Uint16 Pixel; \ |
| 0 | 364 \ |
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365 PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a); \ |
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366 *((Uint16 *)(buf)) = Pixel; \ |
| 0 | 367 } \ |
| 368 break; \ | |
| 369 \ | |
| 370 case 3: { /* FIXME: broken code (no alpha) */ \ | |
| 371 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ | |
| 372 *((buf)+fmt->Rshift/8) = r; \ | |
| 373 *((buf)+fmt->Gshift/8) = g; \ | |
| 374 *((buf)+fmt->Bshift/8) = b; \ | |
| 375 } else { \ | |
| 376 *((buf)+2-fmt->Rshift/8) = r; \ | |
| 377 *((buf)+2-fmt->Gshift/8) = g; \ | |
| 378 *((buf)+2-fmt->Bshift/8) = b; \ | |
| 379 } \ | |
| 380 } \ | |
| 381 break; \ | |
| 382 \ | |
| 383 case 4: { \ | |
|
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384 Uint32 Pixel; \ |
| 0 | 385 \ |
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386 PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a); \ |
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387 *((Uint32 *)(buf)) = Pixel; \ |
| 0 | 388 } \ |
| 389 break; \ | |
| 390 } \ | |
| 391 } | |
| 392 | |
|
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393 /* Blend the RGB values of two Pixels based on a source alpha value */ |
| 0 | 394 #define ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB) \ |
| 395 do { \ | |
| 396 dR = (((sR-dR)*(A))>>8)+dR; \ | |
| 397 dG = (((sG-dG)*(A))>>8)+dG; \ | |
| 398 dB = (((sB-dB)*(A))>>8)+dB; \ | |
| 399 } while(0) | |
| 400 | |
|
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401 /* Blend the RGB values of two Pixels based on a source alpha value */ |
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402 #define ACCURATE_ALPHA_BLEND(sR, sG, sB, sA, dR, dG, dB) \ |
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403 do { \ |
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404 unsigned tR, tG, tB, tA; \ |
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405 tA = 255 - sA; \ |
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406 tR = 1 + (sR * sA) + (dR * tA); \ |
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407 dR = (tR + (tR >> 8)) >> 8; \ |
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408 tG = 1 + (sG * sA) + (dG * tA); \ |
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409 dG = (tG + (tG >> 8)) >> 8; \ |
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410 tB = 1 + (sB * sA) + (dB * tA); \ |
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411 dB = (tB + (tB >> 8)) >> 8; \ |
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412 } while(0) |
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413 |
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414 |
| 0 | 415 /* This is a very useful loop for optimizing blitters */ |
|
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416 #if defined(_MSC_VER) && (_MSC_VER == 1300) |
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417 /* There's a bug in the Visual C++ 7 optimizer when compiling this code */ |
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418 #else |
| 0 | 419 #define USE_DUFFS_LOOP |
|
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420 #endif |
| 0 | 421 #ifdef USE_DUFFS_LOOP |
| 422 | |
| 423 /* 8-times unrolled loop */ | |
| 424 #define DUFFS_LOOP8(pixel_copy_increment, width) \ | |
| 425 { int n = (width+7)/8; \ | |
|
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426 switch (width & 7) { \ |
| 0 | 427 case 0: do { pixel_copy_increment; \ |
| 428 case 7: pixel_copy_increment; \ | |
| 429 case 6: pixel_copy_increment; \ | |
| 430 case 5: pixel_copy_increment; \ | |
| 431 case 4: pixel_copy_increment; \ | |
| 432 case 3: pixel_copy_increment; \ | |
| 433 case 2: pixel_copy_increment; \ | |
| 434 case 1: pixel_copy_increment; \ | |
| 435 } while ( --n > 0 ); \ | |
| 436 } \ | |
| 437 } | |
| 438 | |
| 439 /* 4-times unrolled loop */ | |
| 440 #define DUFFS_LOOP4(pixel_copy_increment, width) \ | |
| 441 { int n = (width+3)/4; \ | |
|
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442 switch (width & 3) { \ |
| 0 | 443 case 0: do { pixel_copy_increment; \ |
| 444 case 3: pixel_copy_increment; \ | |
| 445 case 2: pixel_copy_increment; \ | |
| 446 case 1: pixel_copy_increment; \ | |
| 447 } while ( --n > 0 ); \ | |
| 448 } \ | |
| 449 } | |
| 450 | |
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451 /* 2 - times unrolled loop */ |
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452 #define DUFFS_LOOP_DOUBLE2(pixel_copy_increment, \ |
|
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453 double_pixel_copy_increment, width) \ |
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454 { int n, w = width; \ |
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455 if( w & 1 ) { \ |
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456 pixel_copy_increment; \ |
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457 w--; \ |
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458 } \ |
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459 if ( w > 0 ) { \ |
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460 n = ( w + 2) / 4; \ |
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461 switch( w & 2 ) { \ |
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462 case 0: do { double_pixel_copy_increment; \ |
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463 case 2: double_pixel_copy_increment; \ |
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464 } while ( --n > 0 ); \ |
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465 } \ |
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466 } \ |
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467 } |
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468 |
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469 /* 2 - times unrolled loop 4 pixels */ |
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470 #define DUFFS_LOOP_QUATRO2(pixel_copy_increment, \ |
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471 double_pixel_copy_increment, \ |
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472 quatro_pixel_copy_increment, width) \ |
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473 { int n, w = width; \ |
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474 if(w & 1) { \ |
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475 pixel_copy_increment; \ |
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476 w--; \ |
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477 } \ |
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478 if(w & 2) { \ |
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479 double_pixel_copy_increment; \ |
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480 w -= 2; \ |
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481 } \ |
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482 if ( w > 0 ) { \ |
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483 n = ( w + 7 ) / 8; \ |
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484 switch( w & 4 ) { \ |
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485 case 0: do { quatro_pixel_copy_increment; \ |
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486 case 4: quatro_pixel_copy_increment; \ |
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487 } while ( --n > 0 ); \ |
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488 } \ |
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489 } \ |
|
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490 } |
|
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491 |
| 0 | 492 /* Use the 8-times version of the loop by default */ |
| 493 #define DUFFS_LOOP(pixel_copy_increment, width) \ | |
| 494 DUFFS_LOOP8(pixel_copy_increment, width) | |
| 495 | |
| 496 #else | |
| 497 | |
| 498 /* Don't use Duff's device to unroll loops */ | |
|
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499 #define DUFFS_LOOP_DOUBLE2(pixel_copy_increment, \ |
|
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500 double_pixel_copy_increment, width) \ |
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501 { int n = width; \ |
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502 if( n & 1 ) { \ |
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503 pixel_copy_increment; \ |
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504 n--; \ |
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505 } \ |
|
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506 n=n>>1; \ |
|
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507 for(; n > 0; --n) { \ |
|
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508 double_pixel_copy_increment; \ |
|
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509 } \ |
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510 } |
|
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511 |
|
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512 /* Don't use Duff's device to unroll loops */ |
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513 #define DUFFS_LOOP_QUATRO2(pixel_copy_increment, \ |
|
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514 double_pixel_copy_increment, \ |
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515 quatro_pixel_copy_increment, width) \ |
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516 { int n = width; \ |
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517 if(n & 1) { \ |
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518 pixel_copy_increment; \ |
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519 n--; \ |
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520 } \ |
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521 if(n & 2) { \ |
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522 double_pixel_copy_increment; \ |
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523 n -= 2; \ |
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524 } \ |
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525 n=n>>2; \ |
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526 for(; n > 0; --n) { \ |
|
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527 quatro_pixel_copy_increment; \ |
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528 } \ |
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529 } |
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530 |
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|
531 /* Don't use Duff's device to unroll loops */ |
| 0 | 532 #define DUFFS_LOOP(pixel_copy_increment, width) \ |
| 533 { int n; \ | |
| 534 for ( n=width; n > 0; --n ) { \ | |
| 535 pixel_copy_increment; \ | |
| 536 } \ | |
| 537 } | |
| 538 #define DUFFS_LOOP8(pixel_copy_increment, width) \ | |
| 539 DUFFS_LOOP(pixel_copy_increment, width) | |
| 540 #define DUFFS_LOOP4(pixel_copy_increment, width) \ | |
| 541 DUFFS_LOOP(pixel_copy_increment, width) | |
| 542 | |
| 543 #endif /* USE_DUFFS_LOOP */ | |
| 544 | |
| 545 /* Prevent Visual C++ 6.0 from printing out stupid warnings */ | |
| 546 #if defined(_MSC_VER) && (_MSC_VER >= 600) | |
| 547 #pragma warning(disable: 4550) | |
| 548 #endif | |
| 549 | |
| 550 #endif /* _SDL_blit_h */ | |
|
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551 /* vi: set ts=4 sw=4 expandtab: */ |