Mercurial > sdl-ios-xcode
annotate src/video/SDL_blit.h @ 4695:b7918263da92
Initial commit, adding __ANDROID__ to the platform list
| author | Paul Hunkin <paul@bieh.net> |
|---|---|
| date | Mon, 17 May 2010 15:14:34 +1200 |
| parents | 1bceff8f008f |
| children | e743b9c3f6d6 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
| 3697 | 3 Copyright (C) 1997-2010 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 | |
| 4426 | 27 #ifdef __MINGW32__ |
| 28 #include <_mingw.h> | |
| 29 #endif | |
| 30 | |
| 31 #if defined(__MINGW32__) && defined(__MINGW64_VERSION_MAJOR) | |
| 32 #include <intrin.h> | |
| 33 #else | |
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34 #ifdef __MMX__ |
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35 #include <mmintrin.h> |
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36 #endif |
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37 #ifdef __3dNOW__ |
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38 #include <mm3dnow.h> |
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39 #endif |
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40 #ifdef __SSE__ |
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41 #include <xmmintrin.h> |
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42 #endif |
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43 #ifdef __SSE2__ |
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44 #include <emmintrin.h> |
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45 #endif |
| 4426 | 46 #endif |
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47 |
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48 #include "SDL_cpuinfo.h" |
| 0 | 49 #include "SDL_endian.h" |
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50 #include "SDL_video.h" |
| 0 | 51 |
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52 /* SDL blit copy flags */ |
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53 #define SDL_COPY_MODULATE_COLOR 0x00000001 |
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54 #define SDL_COPY_MODULATE_ALPHA 0x00000002 |
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55 #define SDL_COPY_MASK 0x00000010 |
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56 #define SDL_COPY_BLEND 0x00000020 |
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57 #define SDL_COPY_ADD 0x00000040 |
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58 #define SDL_COPY_MOD 0x00000080 |
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59 #define SDL_COPY_COLORKEY 0x00000100 |
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60 #define SDL_COPY_NEAREST 0x00000200 |
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61 #define SDL_COPY_RLE_DESIRED 0x00001000 |
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62 #define SDL_COPY_RLE_COLORKEY 0x00002000 |
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63 #define SDL_COPY_RLE_ALPHAKEY 0x00004000 |
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64 #define SDL_COPY_RLE_MASK (SDL_COPY_RLE_DESIRED|SDL_COPY_RLE_COLORKEY|SDL_COPY_RLE_ALPHAKEY) |
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65 |
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66 /* SDL blit CPU flags */ |
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67 #define SDL_CPU_ANY 0x00000000 |
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68 #define SDL_CPU_MMX 0x00000001 |
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69 #define SDL_CPU_3DNOW 0x00000002 |
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70 #define SDL_CPU_SSE 0x00000004 |
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71 #define SDL_CPU_SSE2 0x00000008 |
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72 #define SDL_CPU_ALTIVEC_PREFETCH 0x00000010 |
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73 #define SDL_CPU_ALTIVEC_NOPREFETCH 0x00000020 |
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74 |
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75 typedef struct |
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76 { |
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77 Uint8 *src; |
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78 int src_w, src_h; |
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79 int src_pitch; |
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80 int src_skip; |
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81 Uint8 *dst; |
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82 int dst_w, dst_h; |
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83 int dst_pitch; |
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84 int dst_skip; |
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85 SDL_PixelFormat *src_fmt; |
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86 SDL_PixelFormat *dst_fmt; |
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87 Uint8 *table; |
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88 int flags; |
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89 Uint32 colorkey; |
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90 Uint8 r, g, b, a; |
| 0 | 91 } SDL_BlitInfo; |
| 92 | |
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93 typedef void (SDLCALL * SDL_BlitFunc) (SDL_BlitInfo * info); |
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94 |
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95 typedef struct |
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96 { |
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97 Uint32 src_format; |
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98 Uint32 dst_format; |
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99 int flags; |
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100 int cpu; |
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101 SDL_BlitFunc func; |
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102 } SDL_BlitFuncEntry; |
| 0 | 103 |
| 104 /* Blit mapping definition */ | |
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105 typedef struct SDL_BlitMap |
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106 { |
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107 SDL_Surface *dst; |
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108 int identity; |
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109 SDL_blit blit; |
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110 void *data; |
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111 SDL_BlitInfo info; |
| 0 | 112 |
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113 /* the version count matches the destination; mismatch indicates |
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114 an invalid mapping */ |
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115 unsigned int format_version; |
| 0 | 116 } SDL_BlitMap; |
| 117 | |
| 118 /* Functions found in SDL_blit.c */ | |
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119 extern int SDL_CalculateBlit(SDL_Surface * surface); |
| 0 | 120 |
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121 /* Functions found in SDL_blit_*.c */ |
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122 extern SDL_BlitFunc SDL_CalculateBlit0(SDL_Surface * surface); |
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123 extern SDL_BlitFunc SDL_CalculateBlit1(SDL_Surface * surface); |
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124 extern SDL_BlitFunc SDL_CalculateBlitN(SDL_Surface * surface); |
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125 extern SDL_BlitFunc SDL_CalculateBlitA(SDL_Surface * surface); |
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126 |
| 0 | 127 /* |
| 128 * Useful macros for blitting routines | |
| 129 */ | |
| 130 | |
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131 #if defined(__GNUC__) |
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132 #define DECLARE_ALIGNED(t,v,a) t __attribute__((aligned(a))) v |
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133 #elif defined(_MSC_VER) |
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134 #define DECLARE_ALIGNED(t,v,a) __declspec(align(a)) t v |
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135 #else |
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136 #define DECLARE_ALIGNED(t,v,a) t v |
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137 #endif |
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138 |
| 0 | 139 #define FORMAT_EQUAL(A, B) \ |
| 140 ((A)->BitsPerPixel == (B)->BitsPerPixel \ | |
| 141 && ((A)->Rmask == (B)->Rmask) && ((A)->Amask == (B)->Amask)) | |
| 142 | |
| 143 /* Load pixel of the specified format from a buffer and get its R-G-B values */ | |
| 144 /* FIXME: rescale values to 0..255 here? */ | |
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145 #define RGB_FROM_PIXEL(Pixel, fmt, r, g, b) \ |
| 0 | 146 { \ |
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147 r = (((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss); \ |
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148 g = (((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss); \ |
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149 b = (((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss); \ |
| 0 | 150 } |
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151 #define RGB_FROM_RGB565(Pixel, r, g, b) \ |
| 0 | 152 { \ |
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153 r = (((Pixel&0xF800)>>11)<<3); \ |
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154 g = (((Pixel&0x07E0)>>5)<<2); \ |
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155 b = ((Pixel&0x001F)<<3); \ |
| 0 | 156 } |
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157 #define RGB_FROM_RGB555(Pixel, r, g, b) \ |
| 0 | 158 { \ |
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159 r = (((Pixel&0x7C00)>>10)<<3); \ |
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160 g = (((Pixel&0x03E0)>>5)<<3); \ |
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161 b = ((Pixel&0x001F)<<3); \ |
| 0 | 162 } |
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163 #define RGB_FROM_RGB888(Pixel, r, g, b) \ |
| 0 | 164 { \ |
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165 r = ((Pixel&0xFF0000)>>16); \ |
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166 g = ((Pixel&0xFF00)>>8); \ |
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167 b = (Pixel&0xFF); \ |
| 0 | 168 } |
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169 #define RETRIEVE_RGB_PIXEL(buf, bpp, Pixel) \ |
| 0 | 170 do { \ |
| 171 switch (bpp) { \ | |
| 172 case 2: \ | |
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173 Pixel = *((Uint16 *)(buf)); \ |
| 0 | 174 break; \ |
| 175 \ | |
| 176 case 3: { \ | |
| 177 Uint8 *B = (Uint8 *)(buf); \ | |
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178 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
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179 Pixel = B[0] + (B[1] << 8) + (B[2] << 16); \ |
| 0 | 180 } else { \ |
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181 Pixel = (B[0] << 16) + (B[1] << 8) + B[2]; \ |
| 0 | 182 } \ |
| 183 } \ | |
| 184 break; \ | |
| 185 \ | |
| 186 case 4: \ | |
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187 Pixel = *((Uint32 *)(buf)); \ |
| 0 | 188 break; \ |
| 189 \ | |
| 190 default: \ | |
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191 Pixel; /* stop gcc complaints */ \ |
| 0 | 192 break; \ |
| 193 } \ | |
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194 } while (0) |
| 0 | 195 |
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196 #define DISEMBLE_RGB(buf, bpp, fmt, Pixel, r, g, b) \ |
| 0 | 197 do { \ |
| 198 switch (bpp) { \ | |
| 199 case 2: \ | |
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200 Pixel = *((Uint16 *)(buf)); \ |
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201 RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \ |
| 0 | 202 break; \ |
| 203 \ | |
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204 case 3: { \ |
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205 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
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206 r = *((buf)+fmt->Rshift/8); \ |
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207 g = *((buf)+fmt->Gshift/8); \ |
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208 b = *((buf)+fmt->Bshift/8); \ |
| 0 | 209 } else { \ |
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210 r = *((buf)+2-fmt->Rshift/8); \ |
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211 g = *((buf)+2-fmt->Gshift/8); \ |
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212 b = *((buf)+2-fmt->Bshift/8); \ |
| 0 | 213 } \ |
| 214 } \ | |
| 215 break; \ | |
| 216 \ | |
| 217 case 4: \ | |
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218 Pixel = *((Uint32 *)(buf)); \ |
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219 RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \ |
| 0 | 220 break; \ |
| 221 \ | |
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222 default: \ |
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223 Pixel; /* stop gcc complaints */ \ |
| 0 | 224 break; \ |
| 225 } \ | |
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226 } while (0) |
| 0 | 227 |
| 228 /* Assemble R-G-B values into a specified pixel format and store them */ | |
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229 #define PIXEL_FROM_RGB(Pixel, fmt, r, g, b) \ |
| 0 | 230 { \ |
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231 Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \ |
| 0 | 232 ((g>>fmt->Gloss)<<fmt->Gshift)| \ |
| 233 ((b>>fmt->Bloss)<<fmt->Bshift); \ | |
| 234 } | |
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235 #define RGB565_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 236 { \ |
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237 Pixel = ((r>>3)<<11)|((g>>2)<<5)|(b>>3); \ |
| 0 | 238 } |
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239 #define RGB555_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 240 { \ |
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241 Pixel = ((r>>3)<<10)|((g>>3)<<5)|(b>>3); \ |
| 0 | 242 } |
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243 #define RGB888_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 244 { \ |
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245 Pixel = (r<<16)|(g<<8)|b; \ |
| 0 | 246 } |
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247 #define ARGB8888_FROM_RGBA(Pixel, r, g, b, a) \ |
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248 { \ |
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249 Pixel = (a<<24)|(r<<16)|(g<<8)|b; \ |
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250 } |
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251 #define RGBA8888_FROM_RGBA(Pixel, r, g, b, a) \ |
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252 { \ |
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253 Pixel = (r<<24)|(g<<16)|(b<<8)|a; \ |
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254 } |
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255 #define ABGR8888_FROM_RGBA(Pixel, r, g, b, a) \ |
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256 { \ |
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257 Pixel = (a<<24)|(b<<16)|(g<<8)|r; \ |
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258 } |
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259 #define BGRA8888_FROM_RGBA(Pixel, r, g, b, a) \ |
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260 { \ |
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261 Pixel = (b<<24)|(g<<16)|(r<<8)|a; \ |
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262 } |
| 0 | 263 #define ASSEMBLE_RGB(buf, bpp, fmt, r, g, b) \ |
| 264 { \ | |
| 265 switch (bpp) { \ | |
| 266 case 2: { \ | |
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267 Uint16 Pixel; \ |
| 0 | 268 \ |
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269 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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270 *((Uint16 *)(buf)) = Pixel; \ |
| 0 | 271 } \ |
| 272 break; \ | |
| 273 \ | |
| 274 case 3: { \ | |
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275 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
| 0 | 276 *((buf)+fmt->Rshift/8) = r; \ |
| 277 *((buf)+fmt->Gshift/8) = g; \ | |
| 278 *((buf)+fmt->Bshift/8) = b; \ | |
| 279 } else { \ | |
| 280 *((buf)+2-fmt->Rshift/8) = r; \ | |
| 281 *((buf)+2-fmt->Gshift/8) = g; \ | |
| 282 *((buf)+2-fmt->Bshift/8) = b; \ | |
| 283 } \ | |
| 284 } \ | |
| 285 break; \ | |
| 286 \ | |
| 287 case 4: { \ | |
|
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288 Uint32 Pixel; \ |
| 0 | 289 \ |
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290 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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291 *((Uint32 *)(buf)) = Pixel; \ |
| 0 | 292 } \ |
| 293 break; \ | |
| 294 } \ | |
| 295 } | |
| 296 #define ASSEMBLE_RGB_AMASK(buf, bpp, fmt, r, g, b, Amask) \ | |
| 297 { \ | |
| 298 switch (bpp) { \ | |
| 299 case 2: { \ | |
| 300 Uint16 *bufp; \ | |
|
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301 Uint16 Pixel; \ |
| 0 | 302 \ |
| 303 bufp = (Uint16 *)buf; \ | |
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304 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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305 *bufp = Pixel | (*bufp & Amask); \ |
| 0 | 306 } \ |
| 307 break; \ | |
| 308 \ | |
| 309 case 3: { \ | |
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310 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
| 0 | 311 *((buf)+fmt->Rshift/8) = r; \ |
| 312 *((buf)+fmt->Gshift/8) = g; \ | |
| 313 *((buf)+fmt->Bshift/8) = b; \ | |
| 314 } else { \ | |
| 315 *((buf)+2-fmt->Rshift/8) = r; \ | |
| 316 *((buf)+2-fmt->Gshift/8) = g; \ | |
| 317 *((buf)+2-fmt->Bshift/8) = b; \ | |
| 318 } \ | |
| 319 } \ | |
| 320 break; \ | |
| 321 \ | |
| 322 case 4: { \ | |
| 323 Uint32 *bufp; \ | |
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324 Uint32 Pixel; \ |
| 0 | 325 \ |
| 326 bufp = (Uint32 *)buf; \ | |
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327 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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328 *bufp = Pixel | (*bufp & Amask); \ |
| 0 | 329 } \ |
| 330 break; \ | |
| 331 } \ | |
| 332 } | |
| 333 | |
| 334 /* FIXME: Should we rescale alpha into 0..255 here? */ | |
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335 #define RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a) \ |
| 0 | 336 { \ |
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337 r = ((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss; \ |
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338 g = ((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss; \ |
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339 b = ((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss; \ |
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340 a = ((Pixel&fmt->Amask)>>fmt->Ashift)<<fmt->Aloss; \ |
| 0 | 341 } |
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342 #define RGBA_FROM_8888(Pixel, fmt, r, g, b, a) \ |
| 0 | 343 { \ |
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344 r = (Pixel&fmt->Rmask)>>fmt->Rshift; \ |
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345 g = (Pixel&fmt->Gmask)>>fmt->Gshift; \ |
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346 b = (Pixel&fmt->Bmask)>>fmt->Bshift; \ |
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347 a = (Pixel&fmt->Amask)>>fmt->Ashift; \ |
| 0 | 348 } |
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349 #define RGBA_FROM_RGBA8888(Pixel, r, g, b, a) \ |
| 0 | 350 { \ |
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351 r = (Pixel>>24); \ |
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352 g = ((Pixel>>16)&0xFF); \ |
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353 b = ((Pixel>>8)&0xFF); \ |
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354 a = (Pixel&0xFF); \ |
| 0 | 355 } |
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356 #define RGBA_FROM_ARGB8888(Pixel, r, g, b, a) \ |
| 0 | 357 { \ |
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358 r = ((Pixel>>16)&0xFF); \ |
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359 g = ((Pixel>>8)&0xFF); \ |
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360 b = (Pixel&0xFF); \ |
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361 a = (Pixel>>24); \ |
| 0 | 362 } |
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363 #define RGBA_FROM_ABGR8888(Pixel, r, g, b, a) \ |
| 0 | 364 { \ |
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365 r = (Pixel&0xFF); \ |
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366 g = ((Pixel>>8)&0xFF); \ |
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367 b = ((Pixel>>16)&0xFF); \ |
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368 a = (Pixel>>24); \ |
| 0 | 369 } |
|
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370 #define RGBA_FROM_BGRA8888(Pixel, r, g, b, a) \ |
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371 { \ |
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372 r = ((Pixel>>8)&0xFF); \ |
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373 g = ((Pixel>>16)&0xFF); \ |
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374 b = (Pixel>>24); \ |
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375 a = (Pixel&0xFF); \ |
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376 } |
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377 #define DISEMBLE_RGBA(buf, bpp, fmt, Pixel, r, g, b, a) \ |
| 0 | 378 do { \ |
| 379 switch (bpp) { \ | |
| 380 case 2: \ | |
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381 Pixel = *((Uint16 *)(buf)); \ |
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382 RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a); \ |
| 0 | 383 break; \ |
| 384 \ | |
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385 case 3: { \ |
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386 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
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387 r = *((buf)+fmt->Rshift/8); \ |
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388 g = *((buf)+fmt->Gshift/8); \ |
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389 b = *((buf)+fmt->Bshift/8); \ |
| 0 | 390 } else { \ |
|
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391 r = *((buf)+2-fmt->Rshift/8); \ |
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392 g = *((buf)+2-fmt->Gshift/8); \ |
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393 b = *((buf)+2-fmt->Bshift/8); \ |
| 0 | 394 } \ |
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395 a = 0xFF; \ |
| 0 | 396 } \ |
| 397 break; \ | |
| 398 \ | |
| 399 case 4: \ | |
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400 Pixel = *((Uint32 *)(buf)); \ |
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401 RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a); \ |
| 0 | 402 break; \ |
| 403 \ | |
| 404 default: \ | |
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405 Pixel; /* stop gcc complaints */ \ |
| 0 | 406 break; \ |
| 407 } \ | |
|
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408 } while (0) |
| 0 | 409 |
| 410 /* FIXME: this isn't correct, especially for Alpha (maximum != 255) */ | |
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411 #define PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a) \ |
| 0 | 412 { \ |
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413 Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \ |
| 0 | 414 ((g>>fmt->Gloss)<<fmt->Gshift)| \ |
| 415 ((b>>fmt->Bloss)<<fmt->Bshift)| \ | |
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416 ((a>>fmt->Aloss)<<fmt->Ashift); \ |
| 0 | 417 } |
| 418 #define ASSEMBLE_RGBA(buf, bpp, fmt, r, g, b, a) \ | |
| 419 { \ | |
| 420 switch (bpp) { \ | |
| 421 case 2: { \ | |
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422 Uint16 Pixel; \ |
| 0 | 423 \ |
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424 PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a); \ |
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425 *((Uint16 *)(buf)) = Pixel; \ |
| 0 | 426 } \ |
| 427 break; \ | |
| 428 \ | |
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429 case 3: { \ |
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430 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
| 0 | 431 *((buf)+fmt->Rshift/8) = r; \ |
| 432 *((buf)+fmt->Gshift/8) = g; \ | |
| 433 *((buf)+fmt->Bshift/8) = b; \ | |
| 434 } else { \ | |
| 435 *((buf)+2-fmt->Rshift/8) = r; \ | |
| 436 *((buf)+2-fmt->Gshift/8) = g; \ | |
| 437 *((buf)+2-fmt->Bshift/8) = b; \ | |
| 438 } \ | |
| 439 } \ | |
| 440 break; \ | |
| 441 \ | |
| 442 case 4: { \ | |
|
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443 Uint32 Pixel; \ |
| 0 | 444 \ |
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445 PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a); \ |
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446 *((Uint32 *)(buf)) = Pixel; \ |
| 0 | 447 } \ |
| 448 break; \ | |
| 449 } \ | |
| 450 } | |
| 451 | |
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452 /* Blend the RGB values of two Pixels based on a source alpha value */ |
| 0 | 453 #define ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB) \ |
| 454 do { \ | |
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455 dR = ((((int)(sR-dR)*(int)A)/255)+dR); \ |
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456 dG = ((((int)(sG-dG)*(int)A)/255)+dG); \ |
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457 dB = ((((int)(sB-dB)*(int)A)/255)+dB); \ |
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458 } while(0) |
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459 |
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460 |
| 0 | 461 /* This is a very useful loop for optimizing blitters */ |
|
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462 #if defined(_MSC_VER) && (_MSC_VER == 1300) |
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463 /* There's a bug in the Visual C++ 7 optimizer when compiling this code */ |
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464 #else |
| 0 | 465 #define USE_DUFFS_LOOP |
|
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466 #endif |
| 0 | 467 #ifdef USE_DUFFS_LOOP |
| 468 | |
| 469 /* 8-times unrolled loop */ | |
| 470 #define DUFFS_LOOP8(pixel_copy_increment, width) \ | |
| 471 { int n = (width+7)/8; \ | |
|
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472 switch (width & 7) { \ |
| 0 | 473 case 0: do { pixel_copy_increment; \ |
| 474 case 7: pixel_copy_increment; \ | |
| 475 case 6: pixel_copy_increment; \ | |
| 476 case 5: pixel_copy_increment; \ | |
| 477 case 4: pixel_copy_increment; \ | |
| 478 case 3: pixel_copy_increment; \ | |
| 479 case 2: pixel_copy_increment; \ | |
| 480 case 1: pixel_copy_increment; \ | |
| 481 } while ( --n > 0 ); \ | |
| 482 } \ | |
| 483 } | |
| 484 | |
| 485 /* 4-times unrolled loop */ | |
| 486 #define DUFFS_LOOP4(pixel_copy_increment, width) \ | |
| 487 { int n = (width+3)/4; \ | |
|
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488 switch (width & 3) { \ |
| 0 | 489 case 0: do { pixel_copy_increment; \ |
| 490 case 3: pixel_copy_increment; \ | |
| 491 case 2: pixel_copy_increment; \ | |
| 492 case 1: pixel_copy_increment; \ | |
|
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493 } while (--n > 0); \ |
|
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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 | |
|
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501 /* Special version of Duff's device for even more optimization */ |
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502 #define DUFFS_LOOP_124(pixel_copy_increment1, \ |
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503 pixel_copy_increment2, \ |
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504 pixel_copy_increment4, width) \ |
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505 { int n = width; \ |
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506 if (n & 1) { \ |
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507 pixel_copy_increment1; n -= 1; \ |
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508 } \ |
|
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509 if (n & 2) { \ |
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510 pixel_copy_increment2; n -= 2; \ |
|
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511 } \ |
|
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512 if (n) { \ |
|
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513 n = (n+7)/ 8; \ |
|
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514 switch (n & 4) { \ |
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515 case 0: do { pixel_copy_increment4; \ |
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516 case 4: pixel_copy_increment4; \ |
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517 } while (--n > 0); \ |
|
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|
518 } \ |
|
ff602fdfdedc
Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents:
2899
diff
changeset
|
519 } \ |
|
689
5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
diff
changeset
|
520 } |
|
5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
diff
changeset
|
521 |
|
3035
ff602fdfdedc
Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents:
2899
diff
changeset
|
522 #else |
|
689
5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
diff
changeset
|
523 |
|
5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
diff
changeset
|
524 /* Don't use Duff's device to unroll loops */ |
| 0 | 525 #define DUFFS_LOOP(pixel_copy_increment, width) \ |
| 526 { int n; \ | |
| 527 for ( n=width; n > 0; --n ) { \ | |
| 528 pixel_copy_increment; \ | |
| 529 } \ | |
| 530 } | |
| 531 #define DUFFS_LOOP8(pixel_copy_increment, width) \ | |
| 532 DUFFS_LOOP(pixel_copy_increment, width) | |
| 533 #define DUFFS_LOOP4(pixel_copy_increment, width) \ | |
| 534 DUFFS_LOOP(pixel_copy_increment, width) | |
|
3035
ff602fdfdedc
Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents:
2899
diff
changeset
|
535 #define DUFFS_LOOP_124(pixel_copy_increment1, \ |
|
ff602fdfdedc
Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents:
2899
diff
changeset
|
536 pixel_copy_increment2, \ |
|
ff602fdfdedc
Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents:
2899
diff
changeset
|
537 pixel_copy_increment4, width) \ |
|
ff602fdfdedc
Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents:
2899
diff
changeset
|
538 DUFFS_LOOP(pixel_copy_increment1, width) |
| 0 | 539 |
| 540 #endif /* USE_DUFFS_LOOP */ | |
| 541 | |
| 542 /* Prevent Visual C++ 6.0 from printing out stupid warnings */ | |
| 543 #if defined(_MSC_VER) && (_MSC_VER >= 600) | |
| 544 #pragma warning(disable: 4550) | |
| 545 #endif | |
| 546 | |
| 547 #endif /* _SDL_blit_h */ | |
|
2898
e40448bc7727
Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
548 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
|
549 /* vi: set ts=4 sw=4 expandtab: */ |