Mercurial > sdl-ios-xcode
annotate src/video/SDL_blit.h @ 3297:d430982cd5cc
oops
| author | Bob Pendleton <bob@pendleton.com> |
|---|---|
| date | Mon, 21 Sep 2009 22:25:14 +0000 |
| parents | 8d93bfecb9dc |
| children | 90aec03bf9fd |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
| 2859 | 3 Copyright (C) 1997-2009 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" |
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42 #include "SDL_video.h" |
| 0 | 43 |
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44 /* SDL blit copy flags */ |
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45 #define SDL_COPY_MODULATE_COLOR 0x00000001 |
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46 #define SDL_COPY_MODULATE_ALPHA 0x00000002 |
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47 #define SDL_COPY_MASK 0x00000010 |
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48 #define SDL_COPY_BLEND 0x00000020 |
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49 #define SDL_COPY_ADD 0x00000040 |
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50 #define SDL_COPY_MOD 0x00000080 |
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51 #define SDL_COPY_COLORKEY 0x00000100 |
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52 #define SDL_COPY_NEAREST 0x00000200 |
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53 #define SDL_COPY_RLE_DESIRED 0x00001000 |
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54 #define SDL_COPY_RLE_COLORKEY 0x00002000 |
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55 #define SDL_COPY_RLE_ALPHAKEY 0x00004000 |
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56 #define SDL_COPY_RLE_MASK (SDL_COPY_RLE_DESIRED|SDL_COPY_RLE_COLORKEY|SDL_COPY_RLE_ALPHAKEY) |
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57 |
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58 /* SDL blit CPU flags */ |
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59 #define SDL_CPU_ANY 0x00000000 |
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60 #define SDL_CPU_MMX 0x00000001 |
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61 #define SDL_CPU_3DNOW 0x00000002 |
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62 #define SDL_CPU_SSE 0x00000004 |
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63 #define SDL_CPU_SSE2 0x00000008 |
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64 #define SDL_CPU_ALTIVEC_PREFETCH 0x00000010 |
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65 #define SDL_CPU_ALTIVEC_NOPREFETCH 0x00000020 |
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66 |
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67 typedef struct |
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68 { |
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69 Uint8 *src; |
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70 int src_w, src_h; |
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71 int src_pitch; |
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72 int src_skip; |
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73 Uint8 *dst; |
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74 int dst_w, dst_h; |
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75 int dst_pitch; |
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76 int dst_skip; |
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77 SDL_PixelFormat *src_fmt; |
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78 SDL_PixelFormat *dst_fmt; |
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79 Uint8 *table; |
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80 int flags; |
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81 Uint32 colorkey; |
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82 Uint8 r, g, b, a; |
| 0 | 83 } SDL_BlitInfo; |
| 84 | |
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85 typedef void (SDLCALL * SDL_BlitFunc) (SDL_BlitInfo * info); |
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86 |
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87 typedef struct |
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88 { |
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89 Uint32 src_format; |
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90 Uint32 dst_format; |
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91 int flags; |
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92 int cpu; |
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93 SDL_BlitFunc func; |
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94 } SDL_BlitFuncEntry; |
| 0 | 95 |
| 96 /* Blit mapping definition */ | |
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97 typedef struct SDL_BlitMap |
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98 { |
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99 SDL_Surface *dst; |
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100 int identity; |
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101 SDL_blit blit; |
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102 void *data; |
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103 SDL_BlitInfo info; |
| 0 | 104 |
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105 /* the version count matches the destination; mismatch indicates |
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106 an invalid mapping */ |
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107 unsigned int format_version; |
| 0 | 108 } SDL_BlitMap; |
| 109 | |
| 110 /* Functions found in SDL_blit.c */ | |
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111 extern int SDL_CalculateBlit(SDL_Surface * surface); |
| 0 | 112 |
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113 /* Functions found in SDL_blit_*.c */ |
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114 extern SDL_BlitFunc SDL_CalculateBlit0(SDL_Surface * surface); |
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115 extern SDL_BlitFunc SDL_CalculateBlit1(SDL_Surface * surface); |
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116 extern SDL_BlitFunc SDL_CalculateBlitN(SDL_Surface * surface); |
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117 extern SDL_BlitFunc SDL_CalculateBlitA(SDL_Surface * surface); |
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118 |
| 0 | 119 /* |
| 120 * Useful macros for blitting routines | |
| 121 */ | |
| 122 | |
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123 #if defined(__GNUC__) |
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124 #define DECLARE_ALIGNED(t,v,a) t __attribute__((aligned(a))) v |
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125 #elif defined(_MSC_VER) |
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126 #define DECLARE_ALIGNED(t,v,a) __declspec(align(a)) t v |
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127 #else |
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128 #define DECLARE_ALIGNED(t,v,a) t v |
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129 #endif |
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130 |
| 0 | 131 #define FORMAT_EQUAL(A, B) \ |
| 132 ((A)->BitsPerPixel == (B)->BitsPerPixel \ | |
| 133 && ((A)->Rmask == (B)->Rmask) && ((A)->Amask == (B)->Amask)) | |
| 134 | |
| 135 /* Load pixel of the specified format from a buffer and get its R-G-B values */ | |
| 136 /* FIXME: rescale values to 0..255 here? */ | |
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137 #define RGB_FROM_PIXEL(Pixel, fmt, r, g, b) \ |
| 0 | 138 { \ |
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139 r = (((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss); \ |
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140 g = (((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss); \ |
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141 b = (((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss); \ |
| 0 | 142 } |
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143 #define RGB_FROM_RGB565(Pixel, r, g, b) \ |
| 0 | 144 { \ |
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145 r = (((Pixel&0xF800)>>11)<<3); \ |
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146 g = (((Pixel&0x07E0)>>5)<<2); \ |
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147 b = ((Pixel&0x001F)<<3); \ |
| 0 | 148 } |
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149 #define RGB_FROM_RGB555(Pixel, r, g, b) \ |
| 0 | 150 { \ |
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151 r = (((Pixel&0x7C00)>>10)<<3); \ |
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152 g = (((Pixel&0x03E0)>>5)<<3); \ |
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153 b = ((Pixel&0x001F)<<3); \ |
| 0 | 154 } |
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155 #define RGB_FROM_RGB888(Pixel, r, g, b) \ |
| 0 | 156 { \ |
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157 r = ((Pixel&0xFF0000)>>16); \ |
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158 g = ((Pixel&0xFF00)>>8); \ |
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159 b = (Pixel&0xFF); \ |
| 0 | 160 } |
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161 #define RETRIEVE_RGB_PIXEL(buf, bpp, Pixel) \ |
| 0 | 162 do { \ |
| 163 switch (bpp) { \ | |
| 164 case 2: \ | |
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165 Pixel = *((Uint16 *)(buf)); \ |
| 0 | 166 break; \ |
| 167 \ | |
| 168 case 3: { \ | |
| 169 Uint8 *B = (Uint8 *)(buf); \ | |
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170 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
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171 Pixel = B[0] + (B[1] << 8) + (B[2] << 16); \ |
| 0 | 172 } else { \ |
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173 Pixel = (B[0] << 16) + (B[1] << 8) + B[2]; \ |
| 0 | 174 } \ |
| 175 } \ | |
| 176 break; \ | |
| 177 \ | |
| 178 case 4: \ | |
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179 Pixel = *((Uint32 *)(buf)); \ |
| 0 | 180 break; \ |
| 181 \ | |
| 182 default: \ | |
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183 Pixel; /* stop gcc complaints */ \ |
| 0 | 184 break; \ |
| 185 } \ | |
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186 } while (0) |
| 0 | 187 |
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188 #define DISEMBLE_RGB(buf, bpp, fmt, Pixel, r, g, b) \ |
| 0 | 189 do { \ |
| 190 switch (bpp) { \ | |
| 191 case 2: \ | |
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192 Pixel = *((Uint16 *)(buf)); \ |
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193 RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \ |
| 0 | 194 break; \ |
| 195 \ | |
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196 case 3: { \ |
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197 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
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198 r = *((buf)+fmt->Rshift/8); \ |
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199 g = *((buf)+fmt->Gshift/8); \ |
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200 b = *((buf)+fmt->Bshift/8); \ |
| 0 | 201 } else { \ |
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202 r = *((buf)+2-fmt->Rshift/8); \ |
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203 g = *((buf)+2-fmt->Gshift/8); \ |
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204 b = *((buf)+2-fmt->Bshift/8); \ |
| 0 | 205 } \ |
| 206 } \ | |
| 207 break; \ | |
| 208 \ | |
| 209 case 4: \ | |
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210 Pixel = *((Uint32 *)(buf)); \ |
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211 RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \ |
| 0 | 212 break; \ |
| 213 \ | |
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214 default: \ |
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215 Pixel; /* stop gcc complaints */ \ |
| 0 | 216 break; \ |
| 217 } \ | |
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218 } while (0) |
| 0 | 219 |
| 220 /* Assemble R-G-B values into a specified pixel format and store them */ | |
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221 #define PIXEL_FROM_RGB(Pixel, fmt, r, g, b) \ |
| 0 | 222 { \ |
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223 Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \ |
| 0 | 224 ((g>>fmt->Gloss)<<fmt->Gshift)| \ |
| 225 ((b>>fmt->Bloss)<<fmt->Bshift); \ | |
| 226 } | |
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227 #define RGB565_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 228 { \ |
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229 Pixel = ((r>>3)<<11)|((g>>2)<<5)|(b>>3); \ |
| 0 | 230 } |
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231 #define RGB555_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 232 { \ |
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233 Pixel = ((r>>3)<<10)|((g>>3)<<5)|(b>>3); \ |
| 0 | 234 } |
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235 #define RGB888_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 236 { \ |
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237 Pixel = (r<<16)|(g<<8)|b; \ |
| 0 | 238 } |
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239 #define ARGB8888_FROM_RGBA(Pixel, r, g, b, a) \ |
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240 { \ |
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241 Pixel = (a<<24)|(r<<16)|(g<<8)|b; \ |
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242 } |
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243 #define RGBA8888_FROM_RGBA(Pixel, r, g, b, a) \ |
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244 { \ |
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245 Pixel = (r<<24)|(g<<16)|(b<<8)|a; \ |
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246 } |
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247 #define ABGR8888_FROM_RGBA(Pixel, r, g, b, a) \ |
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248 { \ |
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249 Pixel = (a<<24)|(b<<16)|(g<<8)|r; \ |
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250 } |
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251 #define BGRA8888_FROM_RGBA(Pixel, r, g, b, a) \ |
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252 { \ |
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253 Pixel = (b<<24)|(g<<16)|(r<<8)|a; \ |
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254 } |
| 0 | 255 #define ASSEMBLE_RGB(buf, bpp, fmt, r, g, b) \ |
| 256 { \ | |
| 257 switch (bpp) { \ | |
| 258 case 2: { \ | |
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259 Uint16 Pixel; \ |
| 0 | 260 \ |
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261 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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262 *((Uint16 *)(buf)) = Pixel; \ |
| 0 | 263 } \ |
| 264 break; \ | |
| 265 \ | |
| 266 case 3: { \ | |
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267 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
| 0 | 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: { \ | |
|
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280 Uint32 Pixel; \ |
| 0 | 281 \ |
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282 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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283 *((Uint32 *)(buf)) = Pixel; \ |
| 0 | 284 } \ |
| 285 break; \ | |
| 286 } \ | |
| 287 } | |
| 288 #define ASSEMBLE_RGB_AMASK(buf, bpp, fmt, r, g, b, Amask) \ | |
| 289 { \ | |
| 290 switch (bpp) { \ | |
| 291 case 2: { \ | |
| 292 Uint16 *bufp; \ | |
|
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293 Uint16 Pixel; \ |
| 0 | 294 \ |
| 295 bufp = (Uint16 *)buf; \ | |
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296 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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297 *bufp = Pixel | (*bufp & Amask); \ |
| 0 | 298 } \ |
| 299 break; \ | |
| 300 \ | |
| 301 case 3: { \ | |
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302 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
| 0 | 303 *((buf)+fmt->Rshift/8) = r; \ |
| 304 *((buf)+fmt->Gshift/8) = g; \ | |
| 305 *((buf)+fmt->Bshift/8) = b; \ | |
| 306 } else { \ | |
| 307 *((buf)+2-fmt->Rshift/8) = r; \ | |
| 308 *((buf)+2-fmt->Gshift/8) = g; \ | |
| 309 *((buf)+2-fmt->Bshift/8) = b; \ | |
| 310 } \ | |
| 311 } \ | |
| 312 break; \ | |
| 313 \ | |
| 314 case 4: { \ | |
| 315 Uint32 *bufp; \ | |
|
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316 Uint32 Pixel; \ |
| 0 | 317 \ |
| 318 bufp = (Uint32 *)buf; \ | |
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319 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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320 *bufp = Pixel | (*bufp & Amask); \ |
| 0 | 321 } \ |
| 322 break; \ | |
| 323 } \ | |
| 324 } | |
| 325 | |
| 326 /* FIXME: Should we rescale alpha into 0..255 here? */ | |
|
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327 #define RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a) \ |
| 0 | 328 { \ |
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329 r = ((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss; \ |
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330 g = ((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss; \ |
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331 b = ((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss; \ |
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332 a = ((Pixel&fmt->Amask)>>fmt->Ashift)<<fmt->Aloss; \ |
| 0 | 333 } |
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334 #define RGBA_FROM_8888(Pixel, fmt, r, g, b, a) \ |
| 0 | 335 { \ |
|
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336 r = (Pixel&fmt->Rmask)>>fmt->Rshift; \ |
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337 g = (Pixel&fmt->Gmask)>>fmt->Gshift; \ |
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338 b = (Pixel&fmt->Bmask)>>fmt->Bshift; \ |
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339 a = (Pixel&fmt->Amask)>>fmt->Ashift; \ |
| 0 | 340 } |
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341 #define RGBA_FROM_RGBA8888(Pixel, r, g, b, a) \ |
| 0 | 342 { \ |
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343 r = (Pixel>>24); \ |
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344 g = ((Pixel>>16)&0xFF); \ |
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345 b = ((Pixel>>8)&0xFF); \ |
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346 a = (Pixel&0xFF); \ |
| 0 | 347 } |
|
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348 #define RGBA_FROM_ARGB8888(Pixel, r, g, b, a) \ |
| 0 | 349 { \ |
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350 r = ((Pixel>>16)&0xFF); \ |
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351 g = ((Pixel>>8)&0xFF); \ |
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352 b = (Pixel&0xFF); \ |
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353 a = (Pixel>>24); \ |
| 0 | 354 } |
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355 #define RGBA_FROM_ABGR8888(Pixel, r, g, b, a) \ |
| 0 | 356 { \ |
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357 r = (Pixel&0xFF); \ |
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358 g = ((Pixel>>8)&0xFF); \ |
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359 b = ((Pixel>>16)&0xFF); \ |
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360 a = (Pixel>>24); \ |
| 0 | 361 } |
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362 #define RGBA_FROM_BGRA8888(Pixel, r, g, b, a) \ |
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363 { \ |
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364 r = ((Pixel>>8)&0xFF); \ |
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365 g = ((Pixel>>16)&0xFF); \ |
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366 b = (Pixel>>24); \ |
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367 a = (Pixel&0xFF); \ |
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368 } |
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369 #define DISEMBLE_RGBA(buf, bpp, fmt, Pixel, r, g, b, a) \ |
| 0 | 370 do { \ |
| 371 switch (bpp) { \ | |
| 372 case 2: \ | |
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373 Pixel = *((Uint16 *)(buf)); \ |
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374 RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a); \ |
| 0 | 375 break; \ |
| 376 \ | |
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377 case 3: { \ |
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378 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
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379 r = *((buf)+fmt->Rshift/8); \ |
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380 g = *((buf)+fmt->Gshift/8); \ |
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381 b = *((buf)+fmt->Bshift/8); \ |
| 0 | 382 } else { \ |
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383 r = *((buf)+2-fmt->Rshift/8); \ |
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384 g = *((buf)+2-fmt->Gshift/8); \ |
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385 b = *((buf)+2-fmt->Bshift/8); \ |
| 0 | 386 } \ |
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387 a = 0xFF; \ |
| 0 | 388 } \ |
| 389 break; \ | |
| 390 \ | |
| 391 case 4: \ | |
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392 Pixel = *((Uint32 *)(buf)); \ |
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393 RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a); \ |
| 0 | 394 break; \ |
| 395 \ | |
| 396 default: \ | |
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397 Pixel; /* stop gcc complaints */ \ |
| 0 | 398 break; \ |
| 399 } \ | |
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400 } while (0) |
| 0 | 401 |
| 402 /* FIXME: this isn't correct, especially for Alpha (maximum != 255) */ | |
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403 #define PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a) \ |
| 0 | 404 { \ |
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405 Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \ |
| 0 | 406 ((g>>fmt->Gloss)<<fmt->Gshift)| \ |
| 407 ((b>>fmt->Bloss)<<fmt->Bshift)| \ | |
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408 ((a>>fmt->Aloss)<<fmt->Ashift); \ |
| 0 | 409 } |
| 410 #define ASSEMBLE_RGBA(buf, bpp, fmt, r, g, b, a) \ | |
| 411 { \ | |
| 412 switch (bpp) { \ | |
| 413 case 2: { \ | |
|
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414 Uint16 Pixel; \ |
| 0 | 415 \ |
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416 PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a); \ |
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417 *((Uint16 *)(buf)) = Pixel; \ |
| 0 | 418 } \ |
| 419 break; \ | |
| 420 \ | |
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421 case 3: { \ |
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422 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
| 0 | 423 *((buf)+fmt->Rshift/8) = r; \ |
| 424 *((buf)+fmt->Gshift/8) = g; \ | |
| 425 *((buf)+fmt->Bshift/8) = b; \ | |
| 426 } else { \ | |
| 427 *((buf)+2-fmt->Rshift/8) = r; \ | |
| 428 *((buf)+2-fmt->Gshift/8) = g; \ | |
| 429 *((buf)+2-fmt->Bshift/8) = b; \ | |
| 430 } \ | |
| 431 } \ | |
| 432 break; \ | |
| 433 \ | |
| 434 case 4: { \ | |
|
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435 Uint32 Pixel; \ |
| 0 | 436 \ |
|
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437 PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a); \ |
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438 *((Uint32 *)(buf)) = Pixel; \ |
| 0 | 439 } \ |
| 440 break; \ | |
| 441 } \ | |
| 442 } | |
| 443 | |
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444 /* Blend the RGB values of two Pixels based on a source alpha value */ |
| 0 | 445 #define ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB) \ |
| 446 do { \ | |
| 447 dR = (((sR-dR)*(A))>>8)+dR; \ | |
| 448 dG = (((sG-dG)*(A))>>8)+dG; \ | |
| 449 dB = (((sB-dB)*(A))>>8)+dB; \ | |
| 450 } while(0) | |
| 451 | |
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452 /* Blend the RGB values of two Pixels based on a source alpha value */ |
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453 #define ACCURATE_ALPHA_BLEND(sR, sG, sB, sA, dR, dG, dB) \ |
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454 do { \ |
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455 unsigned tR, tG, tB, tA; \ |
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456 tA = 255 - sA; \ |
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457 tR = 1 + (sR * sA) + (dR * tA); \ |
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458 dR = (tR + (tR >> 8)) >> 8; \ |
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459 tG = 1 + (sG * sA) + (dG * tA); \ |
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460 dG = (tG + (tG >> 8)) >> 8; \ |
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461 tB = 1 + (sB * sA) + (dB * tA); \ |
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462 dB = (tB + (tB >> 8)) >> 8; \ |
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463 } while(0) |
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464 |
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465 |
| 0 | 466 /* This is a very useful loop for optimizing blitters */ |
|
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467 #if defined(_MSC_VER) && (_MSC_VER == 1300) |
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468 /* There's a bug in the Visual C++ 7 optimizer when compiling this code */ |
|
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469 #else |
| 0 | 470 #define USE_DUFFS_LOOP |
|
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471 #endif |
| 0 | 472 #ifdef USE_DUFFS_LOOP |
| 473 | |
| 474 /* 8-times unrolled loop */ | |
| 475 #define DUFFS_LOOP8(pixel_copy_increment, width) \ | |
| 476 { int n = (width+7)/8; \ | |
|
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477 switch (width & 7) { \ |
| 0 | 478 case 0: do { pixel_copy_increment; \ |
| 479 case 7: pixel_copy_increment; \ | |
| 480 case 6: pixel_copy_increment; \ | |
| 481 case 5: pixel_copy_increment; \ | |
| 482 case 4: pixel_copy_increment; \ | |
| 483 case 3: pixel_copy_increment; \ | |
| 484 case 2: pixel_copy_increment; \ | |
| 485 case 1: pixel_copy_increment; \ | |
| 486 } while ( --n > 0 ); \ | |
| 487 } \ | |
| 488 } | |
| 489 | |
| 490 /* 4-times unrolled loop */ | |
| 491 #define DUFFS_LOOP4(pixel_copy_increment, width) \ | |
| 492 { int n = (width+3)/4; \ | |
|
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493 switch (width & 3) { \ |
| 0 | 494 case 0: do { pixel_copy_increment; \ |
| 495 case 3: pixel_copy_increment; \ | |
| 496 case 2: pixel_copy_increment; \ | |
| 497 case 1: pixel_copy_increment; \ | |
|
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498 } while (--n > 0); \ |
|
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499 } \ |
|
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500 } |
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501 |
| 0 | 502 /* Use the 8-times version of the loop by default */ |
| 503 #define DUFFS_LOOP(pixel_copy_increment, width) \ | |
| 504 DUFFS_LOOP8(pixel_copy_increment, width) | |
| 505 | |
|
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506 /* Special version of Duff's device for even more optimization */ |
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507 #define DUFFS_LOOP_124(pixel_copy_increment1, \ |
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508 pixel_copy_increment2, \ |
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509 pixel_copy_increment4, width) \ |
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510 { int n = width; \ |
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511 if (n & 1) { \ |
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512 pixel_copy_increment1; n -= 1; \ |
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513 } \ |
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514 if (n & 2) { \ |
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515 pixel_copy_increment2; n -= 2; \ |
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Sam Lantinga <slouken@libsdl.org>
parents:
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516 } \ |
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Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents:
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517 if (n) { \ |
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ff602fdfdedc
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Sam Lantinga <slouken@libsdl.org>
parents:
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518 n = (n+7)/ 8; \ |
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ff602fdfdedc
Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents:
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changeset
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519 switch (n & 4) { \ |
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ff602fdfdedc
Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents:
2899
diff
changeset
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520 case 0: do { pixel_copy_increment4; \ |
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ff602fdfdedc
Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents:
2899
diff
changeset
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521 case 4: pixel_copy_increment4; \ |
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ff602fdfdedc
Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents:
2899
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522 } while (--n > 0); \ |
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ff602fdfdedc
Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents:
2899
diff
changeset
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523 } \ |
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ff602fdfdedc
Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents:
2899
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524 } \ |
|
689
5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
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525 } |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
diff
changeset
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526 |
|
3035
ff602fdfdedc
Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents:
2899
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527 #else |
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689
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Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
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528 |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
diff
changeset
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529 /* Don't use Duff's device to unroll loops */ |
| 0 | 530 #define DUFFS_LOOP(pixel_copy_increment, width) \ |
| 531 { int n; \ | |
| 532 for ( n=width; n > 0; --n ) { \ | |
| 533 pixel_copy_increment; \ | |
| 534 } \ | |
| 535 } | |
| 536 #define DUFFS_LOOP8(pixel_copy_increment, width) \ | |
| 537 DUFFS_LOOP(pixel_copy_increment, width) | |
| 538 #define DUFFS_LOOP4(pixel_copy_increment, width) \ | |
| 539 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
|
540 #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
|
541 pixel_copy_increment2, \ |
|
ff602fdfdedc
Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents:
2899
diff
changeset
|
542 pixel_copy_increment4, width) \ |
|
ff602fdfdedc
Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents:
2899
diff
changeset
|
543 DUFFS_LOOP(pixel_copy_increment1, width) |
| 0 | 544 |
| 545 #endif /* USE_DUFFS_LOOP */ | |
| 546 | |
| 547 /* Prevent Visual C++ 6.0 from printing out stupid warnings */ | |
| 548 #if defined(_MSC_VER) && (_MSC_VER >= 600) | |
| 549 #pragma warning(disable: 4550) | |
| 550 #endif | |
| 551 | |
| 552 #endif /* _SDL_blit_h */ | |
|
2898
e40448bc7727
Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
2859
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changeset
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553 |
|
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
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554 /* vi: set ts=4 sw=4 expandtab: */ |