Mercurial > sdl-ios-xcode
annotate src/video/SDL_blit.h @ 2861:25745ac3d785
Updated TODO list
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Wed, 10 Dec 2008 08:39:00 +0000 |
| parents | 99210400e8b9 |
| children | e40448bc7727 |
| 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" |
| 42 | |
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43 /* SDL blit copy flags */ |
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44 #define SDL_COPY_MODULATE_COLOR 0x00000001 |
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45 #define SDL_COPY_MODULATE_ALPHA 0x00000002 |
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46 #define SDL_COPY_MASK 0x00000010 |
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47 #define SDL_COPY_BLEND 0x00000020 |
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48 #define SDL_COPY_ADD 0x00000040 |
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49 #define SDL_COPY_MOD 0x00000080 |
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50 #define SDL_COPY_COLORKEY 0x00000100 |
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51 #define SDL_COPY_NEAREST 0x00000200 |
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52 #define SDL_COPY_RLE_DESIRED 0x00001000 |
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53 #define SDL_COPY_RLE_COLORKEY 0x00002000 |
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54 #define SDL_COPY_RLE_ALPHAKEY 0x00004000 |
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55 #define SDL_COPY_RLE_MASK (SDL_COPY_RLE_DESIRED|SDL_COPY_RLE_COLORKEY|SDL_COPY_RLE_ALPHAKEY) |
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56 |
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57 /* SDL blit CPU flags */ |
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58 #define SDL_CPU_ANY 0x00000000 |
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59 #define SDL_CPU_MMX 0x00000001 |
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60 #define SDL_CPU_3DNOW 0x00000002 |
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61 #define SDL_CPU_SSE 0x00000004 |
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62 #define SDL_CPU_SSE2 0x00000008 |
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63 #define SDL_CPU_ALTIVEC_PREFETCH 0x00000010 |
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64 #define SDL_CPU_ALTIVEC_NOPREFETCH 0x00000020 |
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65 |
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66 typedef struct |
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67 { |
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68 Uint8 *src; |
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69 int src_w, src_h; |
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70 int src_pitch; |
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71 int src_skip; |
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72 Uint8 *dst; |
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73 int dst_w, dst_h; |
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74 int dst_pitch; |
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75 int dst_skip; |
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76 SDL_PixelFormat *src_fmt; |
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77 SDL_PixelFormat *dst_fmt; |
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78 Uint8 *table; |
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79 int flags; |
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80 Uint32 colorkey; |
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81 Uint8 r, g, b, a; |
| 0 | 82 } SDL_BlitInfo; |
| 83 | |
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84 typedef void (SDLCALL * SDL_BlitFunc) (SDL_BlitInfo * info); |
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85 |
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86 typedef struct |
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87 { |
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88 Uint32 src_format; |
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89 Uint32 dst_format; |
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90 int flags; |
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91 int cpu; |
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92 SDL_BlitFunc func; |
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93 } SDL_BlitFuncEntry; |
| 0 | 94 |
| 95 /* Blit mapping definition */ | |
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96 typedef struct SDL_BlitMap |
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97 { |
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98 SDL_Surface *dst; |
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99 int identity; |
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100 SDL_blit blit; |
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101 void *data; |
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102 SDL_BlitInfo info; |
| 0 | 103 |
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104 /* the version count matches the destination; mismatch indicates |
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105 an invalid mapping */ |
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106 unsigned int format_version; |
| 0 | 107 } SDL_BlitMap; |
| 108 | |
| 109 /* Functions found in SDL_blit.c */ | |
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110 extern int SDL_CalculateBlit(SDL_Surface * surface); |
| 0 | 111 |
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112 /* Functions found in SDL_blit_*.c */ |
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113 extern SDL_BlitFunc SDL_CalculateBlit0(SDL_Surface * surface); |
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114 extern SDL_BlitFunc SDL_CalculateBlit1(SDL_Surface * surface); |
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115 extern SDL_BlitFunc SDL_CalculateBlitN(SDL_Surface * surface); |
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116 extern SDL_BlitFunc SDL_CalculateBlitA(SDL_Surface * surface); |
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117 |
| 0 | 118 /* |
| 119 * Useful macros for blitting routines | |
| 120 */ | |
| 121 | |
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122 #if defined(__GNUC__) |
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123 #define DECLARE_ALIGNED(t,v,a) t __attribute__((aligned(a))) v |
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124 #elif defined(_MSC_VER) |
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125 #define DECLARE_ALIGNED(t,v,a) __declspec(align(a)) t v |
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126 #else |
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127 #define DECLARE_ALIGNED(t,v,a) t v |
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128 #endif |
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129 |
| 0 | 130 #define FORMAT_EQUAL(A, B) \ |
| 131 ((A)->BitsPerPixel == (B)->BitsPerPixel \ | |
| 132 && ((A)->Rmask == (B)->Rmask) && ((A)->Amask == (B)->Amask)) | |
| 133 | |
| 134 /* Load pixel of the specified format from a buffer and get its R-G-B values */ | |
| 135 /* FIXME: rescale values to 0..255 here? */ | |
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136 #define RGB_FROM_PIXEL(Pixel, fmt, r, g, b) \ |
| 0 | 137 { \ |
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138 r = (((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss); \ |
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139 g = (((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss); \ |
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140 b = (((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss); \ |
| 0 | 141 } |
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142 #define RGB_FROM_RGB565(Pixel, r, g, b) \ |
| 0 | 143 { \ |
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144 r = (((Pixel&0xF800)>>11)<<3); \ |
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145 g = (((Pixel&0x07E0)>>5)<<2); \ |
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146 b = ((Pixel&0x001F)<<3); \ |
| 0 | 147 } |
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148 #define RGB_FROM_RGB555(Pixel, r, g, b) \ |
| 0 | 149 { \ |
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150 r = (((Pixel&0x7C00)>>10)<<3); \ |
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151 g = (((Pixel&0x03E0)>>5)<<3); \ |
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152 b = ((Pixel&0x001F)<<3); \ |
| 0 | 153 } |
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154 #define RGB_FROM_RGB888(Pixel, r, g, b) \ |
| 0 | 155 { \ |
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156 r = ((Pixel&0xFF0000)>>16); \ |
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157 g = ((Pixel&0xFF00)>>8); \ |
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158 b = (Pixel&0xFF); \ |
| 0 | 159 } |
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160 #define RETRIEVE_RGB_PIXEL(buf, bpp, Pixel) \ |
| 0 | 161 do { \ |
| 162 switch (bpp) { \ | |
| 163 case 2: \ | |
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164 Pixel = *((Uint16 *)(buf)); \ |
| 0 | 165 break; \ |
| 166 \ | |
| 167 case 3: { \ | |
| 168 Uint8 *B = (Uint8 *)(buf); \ | |
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169 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
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170 Pixel = B[0] + (B[1] << 8) + (B[2] << 16); \ |
| 0 | 171 } else { \ |
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172 Pixel = (B[0] << 16) + (B[1] << 8) + B[2]; \ |
| 0 | 173 } \ |
| 174 } \ | |
| 175 break; \ | |
| 176 \ | |
| 177 case 4: \ | |
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178 Pixel = *((Uint32 *)(buf)); \ |
| 0 | 179 break; \ |
| 180 \ | |
| 181 default: \ | |
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182 Pixel; /* stop gcc complaints */ \ |
| 0 | 183 break; \ |
| 184 } \ | |
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185 } while (0) |
| 0 | 186 |
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187 #define DISEMBLE_RGB(buf, bpp, fmt, Pixel, r, g, b) \ |
| 0 | 188 do { \ |
| 189 switch (bpp) { \ | |
| 190 case 2: \ | |
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191 Pixel = *((Uint16 *)(buf)); \ |
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192 RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \ |
| 0 | 193 break; \ |
| 194 \ | |
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195 case 3: { \ |
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196 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
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197 r = *((buf)+fmt->Rshift/8); \ |
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198 g = *((buf)+fmt->Gshift/8); \ |
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199 b = *((buf)+fmt->Bshift/8); \ |
| 0 | 200 } else { \ |
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201 r = *((buf)+2-fmt->Rshift/8); \ |
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202 g = *((buf)+2-fmt->Gshift/8); \ |
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203 b = *((buf)+2-fmt->Bshift/8); \ |
| 0 | 204 } \ |
| 205 } \ | |
| 206 break; \ | |
| 207 \ | |
| 208 case 4: \ | |
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209 Pixel = *((Uint32 *)(buf)); \ |
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210 RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \ |
| 0 | 211 break; \ |
| 212 \ | |
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213 default: \ |
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214 Pixel; /* stop gcc complaints */ \ |
| 0 | 215 break; \ |
| 216 } \ | |
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217 } while (0) |
| 0 | 218 |
| 219 /* Assemble R-G-B values into a specified pixel format and store them */ | |
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220 #define PIXEL_FROM_RGB(Pixel, fmt, r, g, b) \ |
| 0 | 221 { \ |
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222 Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \ |
| 0 | 223 ((g>>fmt->Gloss)<<fmt->Gshift)| \ |
| 224 ((b>>fmt->Bloss)<<fmt->Bshift); \ | |
| 225 } | |
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226 #define RGB565_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 227 { \ |
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228 Pixel = ((r>>3)<<11)|((g>>2)<<5)|(b>>3); \ |
| 0 | 229 } |
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230 #define RGB555_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 231 { \ |
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232 Pixel = ((r>>3)<<10)|((g>>3)<<5)|(b>>3); \ |
| 0 | 233 } |
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234 #define RGB888_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 235 { \ |
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236 Pixel = (r<<16)|(g<<8)|b; \ |
| 0 | 237 } |
| 238 #define ASSEMBLE_RGB(buf, bpp, fmt, r, g, b) \ | |
| 239 { \ | |
| 240 switch (bpp) { \ | |
| 241 case 2: { \ | |
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242 Uint16 Pixel; \ |
| 0 | 243 \ |
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244 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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245 *((Uint16 *)(buf)) = Pixel; \ |
| 0 | 246 } \ |
| 247 break; \ | |
| 248 \ | |
| 249 case 3: { \ | |
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250 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
| 0 | 251 *((buf)+fmt->Rshift/8) = r; \ |
| 252 *((buf)+fmt->Gshift/8) = g; \ | |
| 253 *((buf)+fmt->Bshift/8) = b; \ | |
| 254 } else { \ | |
| 255 *((buf)+2-fmt->Rshift/8) = r; \ | |
| 256 *((buf)+2-fmt->Gshift/8) = g; \ | |
| 257 *((buf)+2-fmt->Bshift/8) = b; \ | |
| 258 } \ | |
| 259 } \ | |
| 260 break; \ | |
| 261 \ | |
| 262 case 4: { \ | |
|
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263 Uint32 Pixel; \ |
| 0 | 264 \ |
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265 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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266 *((Uint32 *)(buf)) = Pixel; \ |
| 0 | 267 } \ |
| 268 break; \ | |
| 269 } \ | |
| 270 } | |
| 271 #define ASSEMBLE_RGB_AMASK(buf, bpp, fmt, r, g, b, Amask) \ | |
| 272 { \ | |
| 273 switch (bpp) { \ | |
| 274 case 2: { \ | |
| 275 Uint16 *bufp; \ | |
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276 Uint16 Pixel; \ |
| 0 | 277 \ |
| 278 bufp = (Uint16 *)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 case 3: { \ | |
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285 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
| 0 | 286 *((buf)+fmt->Rshift/8) = r; \ |
| 287 *((buf)+fmt->Gshift/8) = g; \ | |
| 288 *((buf)+fmt->Bshift/8) = b; \ | |
| 289 } else { \ | |
| 290 *((buf)+2-fmt->Rshift/8) = r; \ | |
| 291 *((buf)+2-fmt->Gshift/8) = g; \ | |
| 292 *((buf)+2-fmt->Bshift/8) = b; \ | |
| 293 } \ | |
| 294 } \ | |
| 295 break; \ | |
| 296 \ | |
| 297 case 4: { \ | |
| 298 Uint32 *bufp; \ | |
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299 Uint32 Pixel; \ |
| 0 | 300 \ |
| 301 bufp = (Uint32 *)buf; \ | |
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302 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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303 *bufp = Pixel | (*bufp & Amask); \ |
| 0 | 304 } \ |
| 305 break; \ | |
| 306 } \ | |
| 307 } | |
| 308 | |
| 309 /* FIXME: Should we rescale alpha into 0..255 here? */ | |
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310 #define RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a) \ |
| 0 | 311 { \ |
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312 r = ((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss; \ |
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313 g = ((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss; \ |
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314 b = ((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss; \ |
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315 a = ((Pixel&fmt->Amask)>>fmt->Ashift)<<fmt->Aloss; \ |
| 0 | 316 } |
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317 #define RGBA_FROM_8888(Pixel, fmt, r, g, b, a) \ |
| 0 | 318 { \ |
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319 r = (Pixel&fmt->Rmask)>>fmt->Rshift; \ |
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320 g = (Pixel&fmt->Gmask)>>fmt->Gshift; \ |
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321 b = (Pixel&fmt->Bmask)>>fmt->Bshift; \ |
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322 a = (Pixel&fmt->Amask)>>fmt->Ashift; \ |
| 0 | 323 } |
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324 #define RGBA_FROM_RGBA8888(Pixel, r, g, b, a) \ |
| 0 | 325 { \ |
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326 r = (Pixel>>24); \ |
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327 g = ((Pixel>>16)&0xFF); \ |
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328 b = ((Pixel>>8)&0xFF); \ |
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329 a = (Pixel&0xFF); \ |
| 0 | 330 } |
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331 #define RGBA_FROM_ARGB8888(Pixel, r, g, b, a) \ |
| 0 | 332 { \ |
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333 r = ((Pixel>>16)&0xFF); \ |
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334 g = ((Pixel>>8)&0xFF); \ |
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335 b = (Pixel&0xFF); \ |
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336 a = (Pixel>>24); \ |
| 0 | 337 } |
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338 #define RGBA_FROM_ABGR8888(Pixel, r, g, b, a) \ |
| 0 | 339 { \ |
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340 r = (Pixel&0xFF); \ |
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341 g = ((Pixel>>8)&0xFF); \ |
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342 b = ((Pixel>>16)&0xFF); \ |
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343 a = (Pixel>>24); \ |
| 0 | 344 } |
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345 #define DISEMBLE_RGBA(buf, bpp, fmt, Pixel, r, g, b, a) \ |
| 0 | 346 do { \ |
| 347 switch (bpp) { \ | |
| 348 case 2: \ | |
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349 Pixel = *((Uint16 *)(buf)); \ |
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350 RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a); \ |
| 0 | 351 break; \ |
| 352 \ | |
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353 case 3: { \ |
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354 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
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355 r = *((buf)+fmt->Rshift/8); \ |
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356 g = *((buf)+fmt->Gshift/8); \ |
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357 b = *((buf)+fmt->Bshift/8); \ |
| 0 | 358 } else { \ |
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359 r = *((buf)+2-fmt->Rshift/8); \ |
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360 g = *((buf)+2-fmt->Gshift/8); \ |
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361 b = *((buf)+2-fmt->Bshift/8); \ |
| 0 | 362 } \ |
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363 a = 0xFF; \ |
| 0 | 364 } \ |
| 365 break; \ | |
| 366 \ | |
| 367 case 4: \ | |
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368 Pixel = *((Uint32 *)(buf)); \ |
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369 RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a); \ |
| 0 | 370 break; \ |
| 371 \ | |
| 372 default: \ | |
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373 Pixel; /* stop gcc complaints */ \ |
| 0 | 374 break; \ |
| 375 } \ | |
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376 } while (0) |
| 0 | 377 |
| 378 /* FIXME: this isn't correct, especially for Alpha (maximum != 255) */ | |
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379 #define PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a) \ |
| 0 | 380 { \ |
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381 Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \ |
| 0 | 382 ((g>>fmt->Gloss)<<fmt->Gshift)| \ |
| 383 ((b>>fmt->Bloss)<<fmt->Bshift)| \ | |
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384 ((a>>fmt->Aloss)<<fmt->Ashift); \ |
| 0 | 385 } |
| 386 #define ASSEMBLE_RGBA(buf, bpp, fmt, r, g, b, a) \ | |
| 387 { \ | |
| 388 switch (bpp) { \ | |
| 389 case 2: { \ | |
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390 Uint16 Pixel; \ |
| 0 | 391 \ |
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392 PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a); \ |
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393 *((Uint16 *)(buf)) = Pixel; \ |
| 0 | 394 } \ |
| 395 break; \ | |
| 396 \ | |
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397 case 3: { \ |
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398 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
| 0 | 399 *((buf)+fmt->Rshift/8) = r; \ |
| 400 *((buf)+fmt->Gshift/8) = g; \ | |
| 401 *((buf)+fmt->Bshift/8) = b; \ | |
| 402 } else { \ | |
| 403 *((buf)+2-fmt->Rshift/8) = r; \ | |
| 404 *((buf)+2-fmt->Gshift/8) = g; \ | |
| 405 *((buf)+2-fmt->Bshift/8) = b; \ | |
| 406 } \ | |
| 407 } \ | |
| 408 break; \ | |
| 409 \ | |
| 410 case 4: { \ | |
|
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411 Uint32 Pixel; \ |
| 0 | 412 \ |
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413 PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a); \ |
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414 *((Uint32 *)(buf)) = Pixel; \ |
| 0 | 415 } \ |
| 416 break; \ | |
| 417 } \ | |
| 418 } | |
| 419 | |
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420 /* Blend the RGB values of two Pixels based on a source alpha value */ |
| 0 | 421 #define ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB) \ |
| 422 do { \ | |
| 423 dR = (((sR-dR)*(A))>>8)+dR; \ | |
| 424 dG = (((sG-dG)*(A))>>8)+dG; \ | |
| 425 dB = (((sB-dB)*(A))>>8)+dB; \ | |
| 426 } while(0) | |
| 427 | |
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428 /* Blend the RGB values of two Pixels based on a source alpha value */ |
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429 #define ACCURATE_ALPHA_BLEND(sR, sG, sB, sA, dR, dG, dB) \ |
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430 do { \ |
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431 unsigned tR, tG, tB, tA; \ |
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432 tA = 255 - sA; \ |
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433 tR = 1 + (sR * sA) + (dR * tA); \ |
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434 dR = (tR + (tR >> 8)) >> 8; \ |
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435 tG = 1 + (sG * sA) + (dG * tA); \ |
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436 dG = (tG + (tG >> 8)) >> 8; \ |
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437 tB = 1 + (sB * sA) + (dB * tA); \ |
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438 dB = (tB + (tB >> 8)) >> 8; \ |
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439 } while(0) |
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440 |
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441 |
| 0 | 442 /* This is a very useful loop for optimizing blitters */ |
|
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443 #if defined(_MSC_VER) && (_MSC_VER == 1300) |
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444 /* There's a bug in the Visual C++ 7 optimizer when compiling this code */ |
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445 #else |
| 0 | 446 #define USE_DUFFS_LOOP |
|
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447 #endif |
| 0 | 448 #ifdef USE_DUFFS_LOOP |
| 449 | |
| 450 /* 8-times unrolled loop */ | |
| 451 #define DUFFS_LOOP8(pixel_copy_increment, width) \ | |
| 452 { int n = (width+7)/8; \ | |
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453 switch (width & 7) { \ |
| 0 | 454 case 0: do { pixel_copy_increment; \ |
| 455 case 7: pixel_copy_increment; \ | |
| 456 case 6: pixel_copy_increment; \ | |
| 457 case 5: pixel_copy_increment; \ | |
| 458 case 4: pixel_copy_increment; \ | |
| 459 case 3: pixel_copy_increment; \ | |
| 460 case 2: pixel_copy_increment; \ | |
| 461 case 1: pixel_copy_increment; \ | |
| 462 } while ( --n > 0 ); \ | |
| 463 } \ | |
| 464 } | |
| 465 | |
| 466 /* 4-times unrolled loop */ | |
| 467 #define DUFFS_LOOP4(pixel_copy_increment, width) \ | |
| 468 { int n = (width+3)/4; \ | |
|
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469 switch (width & 3) { \ |
| 0 | 470 case 0: do { pixel_copy_increment; \ |
| 471 case 3: pixel_copy_increment; \ | |
| 472 case 2: pixel_copy_increment; \ | |
| 473 case 1: pixel_copy_increment; \ | |
| 474 } while ( --n > 0 ); \ | |
| 475 } \ | |
| 476 } | |
| 477 | |
|
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478 /* 2 - times unrolled loop */ |
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479 #define DUFFS_LOOP_DOUBLE2(pixel_copy_increment, \ |
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480 double_pixel_copy_increment, width) \ |
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481 { int n, w = width; \ |
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482 if( w & 1 ) { \ |
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483 pixel_copy_increment; \ |
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484 w--; \ |
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485 } \ |
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486 if ( w > 0 ) { \ |
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487 n = ( w + 2) / 4; \ |
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488 switch( w & 2 ) { \ |
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489 case 0: do { double_pixel_copy_increment; \ |
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490 case 2: double_pixel_copy_increment; \ |
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491 } while ( --n > 0 ); \ |
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492 } \ |
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493 } \ |
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494 } |
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495 |
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496 /* 2 - times unrolled loop 4 pixels */ |
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497 #define DUFFS_LOOP_QUATRO2(pixel_copy_increment, \ |
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498 double_pixel_copy_increment, \ |
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499 quatro_pixel_copy_increment, width) \ |
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500 { int n, w = width; \ |
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501 if(w & 1) { \ |
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502 pixel_copy_increment; \ |
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503 w--; \ |
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504 } \ |
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505 if(w & 2) { \ |
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506 double_pixel_copy_increment; \ |
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507 w -= 2; \ |
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508 } \ |
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509 if ( w > 0 ) { \ |
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510 n = ( w + 7 ) / 8; \ |
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511 switch( w & 4 ) { \ |
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512 case 0: do { quatro_pixel_copy_increment; \ |
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513 case 4: quatro_pixel_copy_increment; \ |
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514 } while ( --n > 0 ); \ |
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515 } \ |
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516 } \ |
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517 } |
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518 |
| 0 | 519 /* Use the 8-times version of the loop by default */ |
| 520 #define DUFFS_LOOP(pixel_copy_increment, width) \ | |
| 521 DUFFS_LOOP8(pixel_copy_increment, width) | |
| 522 | |
| 523 #else | |
| 524 | |
| 525 /* Don't use Duff's device to unroll loops */ | |
|
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Date: Tue, 19 Aug 2003 17:57:00 +0200
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526 #define DUFFS_LOOP_DOUBLE2(pixel_copy_increment, \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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527 double_pixel_copy_increment, width) \ |
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528 { int n = width; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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529 if( n & 1 ) { \ |
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5bb080d35049
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530 pixel_copy_increment; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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531 n--; \ |
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532 } \ |
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533 n=n>>1; \ |
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5bb080d35049
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534 for(; n > 0; --n) { \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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535 double_pixel_copy_increment; \ |
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5bb080d35049
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536 } \ |
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5bb080d35049
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537 } |
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5bb080d35049
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538 |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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539 /* Don't use Duff's device to unroll loops */ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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540 #define DUFFS_LOOP_QUATRO2(pixel_copy_increment, \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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541 double_pixel_copy_increment, \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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542 quatro_pixel_copy_increment, width) \ |
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543 { int n = width; \ |
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Date: Tue, 19 Aug 2003 17:57:00 +0200
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544 if(n & 1) { \ |
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545 pixel_copy_increment; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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546 n--; \ |
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547 } \ |
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548 if(n & 2) { \ |
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Date: Tue, 19 Aug 2003 17:57:00 +0200
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549 double_pixel_copy_increment; \ |
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Date: Tue, 19 Aug 2003 17:57:00 +0200
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550 n -= 2; \ |
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Date: Tue, 19 Aug 2003 17:57:00 +0200
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551 } \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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552 n=n>>2; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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553 for(; n > 0; --n) { \ |
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5bb080d35049
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554 quatro_pixel_copy_increment; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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555 } \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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556 } |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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557 |
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558 /* Don't use Duff's device to unroll loops */ |
| 0 | 559 #define DUFFS_LOOP(pixel_copy_increment, width) \ |
| 560 { int n; \ | |
| 561 for ( n=width; n > 0; --n ) { \ | |
| 562 pixel_copy_increment; \ | |
| 563 } \ | |
| 564 } | |
| 565 #define DUFFS_LOOP8(pixel_copy_increment, width) \ | |
| 566 DUFFS_LOOP(pixel_copy_increment, width) | |
| 567 #define DUFFS_LOOP4(pixel_copy_increment, width) \ | |
| 568 DUFFS_LOOP(pixel_copy_increment, width) | |
| 569 | |
| 570 #endif /* USE_DUFFS_LOOP */ | |
| 571 | |
| 572 /* Prevent Visual C++ 6.0 from printing out stupid warnings */ | |
| 573 #if defined(_MSC_VER) && (_MSC_VER >= 600) | |
| 574 #pragma warning(disable: 4550) | |
| 575 #endif | |
| 576 | |
| 577 #endif /* _SDL_blit_h */ | |
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1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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578 /* vi: set ts=4 sw=4 expandtab: */ |