Mercurial > sdl-ios-xcode
annotate src/video/SDL_blit.h @ 5284:96a22141cf86 tip
Changed output directory of Universal libSDL.a for iOS to respect build configurations. Template generator was updated to reflect these changes as well.
| author | Eric Wing <ewing . public |-at-| gmail . com> |
|---|---|
| date | Sat, 12 Feb 2011 21:52:30 -0800 |
| parents | b530ef003506 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
| 5267 | 3 Copyright (C) 1997-2011 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 __SSE__ |
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38 #include <xmmintrin.h> |
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39 #endif |
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40 #ifdef __SSE2__ |
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41 #include <emmintrin.h> |
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42 #endif |
| 4426 | 43 #endif |
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44 |
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45 #include "SDL_cpuinfo.h" |
| 0 | 46 #include "SDL_endian.h" |
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47 #include "SDL_surface.h" |
| 0 | 48 |
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49 /* SDL blit copy flags */ |
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50 #define SDL_COPY_MODULATE_COLOR 0x00000001 |
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51 #define SDL_COPY_MODULATE_ALPHA 0x00000002 |
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52 #define SDL_COPY_BLEND 0x00000010 |
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53 #define SDL_COPY_ADD 0x00000020 |
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54 #define SDL_COPY_MOD 0x00000040 |
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55 #define SDL_COPY_COLORKEY 0x00000100 |
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56 #define SDL_COPY_NEAREST 0x00000200 |
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57 #define SDL_COPY_RLE_DESIRED 0x00001000 |
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58 #define SDL_COPY_RLE_COLORKEY 0x00002000 |
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59 #define SDL_COPY_RLE_ALPHAKEY 0x00004000 |
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60 #define SDL_COPY_RLE_MASK (SDL_COPY_RLE_DESIRED|SDL_COPY_RLE_COLORKEY|SDL_COPY_RLE_ALPHAKEY) |
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61 |
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62 /* SDL blit CPU flags */ |
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63 #define SDL_CPU_ANY 0x00000000 |
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64 #define SDL_CPU_MMX 0x00000001 |
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65 #define SDL_CPU_SSE 0x00000004 |
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66 #define SDL_CPU_SSE2 0x00000008 |
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67 |
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68 typedef struct |
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69 { |
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70 Uint8 *src; |
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71 int src_w, src_h; |
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72 int src_pitch; |
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73 int src_skip; |
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74 Uint8 *dst; |
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75 int dst_w, dst_h; |
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76 int dst_pitch; |
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77 int dst_skip; |
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78 SDL_PixelFormat *src_fmt; |
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79 SDL_PixelFormat *dst_fmt; |
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80 Uint8 *table; |
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81 int flags; |
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82 Uint32 colorkey; |
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83 Uint8 r, g, b, a; |
| 0 | 84 } SDL_BlitInfo; |
| 85 | |
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86 typedef void (SDLCALL * SDL_BlitFunc) (SDL_BlitInfo * info); |
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87 |
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88 typedef struct |
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89 { |
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90 Uint32 src_format; |
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91 Uint32 dst_format; |
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92 int flags; |
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93 int cpu; |
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94 SDL_BlitFunc func; |
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95 } SDL_BlitFuncEntry; |
| 0 | 96 |
| 97 /* Blit mapping definition */ | |
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98 typedef struct SDL_BlitMap |
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99 { |
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100 SDL_Surface *dst; |
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101 int identity; |
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102 SDL_blit blit; |
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103 void *data; |
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104 SDL_BlitInfo info; |
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106 /* the version count matches the destination; mismatch indicates |
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107 an invalid mapping */ |
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108 unsigned int format_version; |
| 0 | 109 } SDL_BlitMap; |
| 110 | |
| 111 /* Functions found in SDL_blit.c */ | |
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112 extern int SDL_CalculateBlit(SDL_Surface * surface); |
| 0 | 113 |
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114 /* Functions found in SDL_blit_*.c */ |
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115 extern SDL_BlitFunc SDL_CalculateBlit0(SDL_Surface * surface); |
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116 extern SDL_BlitFunc SDL_CalculateBlit1(SDL_Surface * surface); |
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117 extern SDL_BlitFunc SDL_CalculateBlitN(SDL_Surface * surface); |
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118 extern SDL_BlitFunc SDL_CalculateBlitA(SDL_Surface * surface); |
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119 |
| 0 | 120 /* |
| 121 * Useful macros for blitting routines | |
| 122 */ | |
| 123 | |
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124 #if defined(__GNUC__) |
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125 #define DECLARE_ALIGNED(t,v,a) t __attribute__((aligned(a))) v |
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126 #elif defined(_MSC_VER) |
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127 #define DECLARE_ALIGNED(t,v,a) __declspec(align(a)) t v |
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128 #else |
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129 #define DECLARE_ALIGNED(t,v,a) t v |
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130 #endif |
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131 |
| 0 | 132 #define FORMAT_EQUAL(A, B) \ |
| 133 ((A)->BitsPerPixel == (B)->BitsPerPixel \ | |
| 134 && ((A)->Rmask == (B)->Rmask) && ((A)->Amask == (B)->Amask)) | |
| 135 | |
| 136 /* Load pixel of the specified format from a buffer and get its R-G-B values */ | |
| 137 /* FIXME: rescale values to 0..255 here? */ | |
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138 #define RGB_FROM_PIXEL(Pixel, fmt, r, g, b) \ |
| 0 | 139 { \ |
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140 r = (((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss); \ |
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141 g = (((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss); \ |
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142 b = (((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss); \ |
| 0 | 143 } |
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144 #define RGB_FROM_RGB565(Pixel, r, g, b) \ |
| 0 | 145 { \ |
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146 r = (((Pixel&0xF800)>>11)<<3); \ |
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147 g = (((Pixel&0x07E0)>>5)<<2); \ |
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148 b = ((Pixel&0x001F)<<3); \ |
| 0 | 149 } |
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150 #define RGB_FROM_RGB555(Pixel, r, g, b) \ |
| 0 | 151 { \ |
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152 r = (((Pixel&0x7C00)>>10)<<3); \ |
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153 g = (((Pixel&0x03E0)>>5)<<3); \ |
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154 b = ((Pixel&0x001F)<<3); \ |
| 0 | 155 } |
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156 #define RGB_FROM_RGB888(Pixel, r, g, b) \ |
| 0 | 157 { \ |
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158 r = ((Pixel&0xFF0000)>>16); \ |
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159 g = ((Pixel&0xFF00)>>8); \ |
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160 b = (Pixel&0xFF); \ |
| 0 | 161 } |
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162 #define RETRIEVE_RGB_PIXEL(buf, bpp, Pixel) \ |
| 0 | 163 do { \ |
| 164 switch (bpp) { \ | |
| 165 case 2: \ | |
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166 Pixel = *((Uint16 *)(buf)); \ |
| 0 | 167 break; \ |
| 168 \ | |
| 169 case 3: { \ | |
| 170 Uint8 *B = (Uint8 *)(buf); \ | |
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171 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
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172 Pixel = B[0] + (B[1] << 8) + (B[2] << 16); \ |
| 0 | 173 } else { \ |
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174 Pixel = (B[0] << 16) + (B[1] << 8) + B[2]; \ |
| 0 | 175 } \ |
| 176 } \ | |
| 177 break; \ | |
| 178 \ | |
| 179 case 4: \ | |
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180 Pixel = *((Uint32 *)(buf)); \ |
| 0 | 181 break; \ |
| 182 \ | |
| 183 default: \ | |
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184 Pixel; /* stop gcc complaints */ \ |
| 0 | 185 break; \ |
| 186 } \ | |
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187 } while (0) |
| 0 | 188 |
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189 #define DISEMBLE_RGB(buf, bpp, fmt, Pixel, r, g, b) \ |
| 0 | 190 do { \ |
| 191 switch (bpp) { \ | |
| 192 case 2: \ | |
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193 Pixel = *((Uint16 *)(buf)); \ |
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194 RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \ |
| 0 | 195 break; \ |
| 196 \ | |
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197 case 3: { \ |
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198 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
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199 r = *((buf)+fmt->Rshift/8); \ |
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200 g = *((buf)+fmt->Gshift/8); \ |
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201 b = *((buf)+fmt->Bshift/8); \ |
| 0 | 202 } else { \ |
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203 r = *((buf)+2-fmt->Rshift/8); \ |
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204 g = *((buf)+2-fmt->Gshift/8); \ |
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205 b = *((buf)+2-fmt->Bshift/8); \ |
| 0 | 206 } \ |
| 207 } \ | |
| 208 break; \ | |
| 209 \ | |
| 210 case 4: \ | |
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211 Pixel = *((Uint32 *)(buf)); \ |
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212 RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \ |
| 0 | 213 break; \ |
| 214 \ | |
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215 default: \ |
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216 Pixel; /* stop gcc complaints */ \ |
| 0 | 217 break; \ |
| 218 } \ | |
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219 } while (0) |
| 0 | 220 |
| 221 /* Assemble R-G-B values into a specified pixel format and store them */ | |
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222 #define PIXEL_FROM_RGB(Pixel, fmt, r, g, b) \ |
| 0 | 223 { \ |
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224 Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \ |
| 0 | 225 ((g>>fmt->Gloss)<<fmt->Gshift)| \ |
| 226 ((b>>fmt->Bloss)<<fmt->Bshift); \ | |
| 227 } | |
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228 #define RGB565_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 229 { \ |
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230 Pixel = ((r>>3)<<11)|((g>>2)<<5)|(b>>3); \ |
| 0 | 231 } |
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232 #define RGB555_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 233 { \ |
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234 Pixel = ((r>>3)<<10)|((g>>3)<<5)|(b>>3); \ |
| 0 | 235 } |
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236 #define RGB888_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 237 { \ |
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238 Pixel = (r<<16)|(g<<8)|b; \ |
| 0 | 239 } |
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240 #define ARGB8888_FROM_RGBA(Pixel, r, g, b, a) \ |
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241 { \ |
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242 Pixel = (a<<24)|(r<<16)|(g<<8)|b; \ |
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243 } |
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244 #define RGBA8888_FROM_RGBA(Pixel, r, g, b, a) \ |
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245 { \ |
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246 Pixel = (r<<24)|(g<<16)|(b<<8)|a; \ |
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247 } |
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248 #define ABGR8888_FROM_RGBA(Pixel, r, g, b, a) \ |
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249 { \ |
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250 Pixel = (a<<24)|(b<<16)|(g<<8)|r; \ |
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251 } |
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252 #define BGRA8888_FROM_RGBA(Pixel, r, g, b, a) \ |
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253 { \ |
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254 Pixel = (b<<24)|(g<<16)|(r<<8)|a; \ |
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255 } |
| 0 | 256 #define ASSEMBLE_RGB(buf, bpp, fmt, r, g, b) \ |
| 257 { \ | |
| 258 switch (bpp) { \ | |
| 259 case 2: { \ | |
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260 Uint16 Pixel; \ |
| 0 | 261 \ |
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262 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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263 *((Uint16 *)(buf)) = Pixel; \ |
| 0 | 264 } \ |
| 265 break; \ | |
| 266 \ | |
| 267 case 3: { \ | |
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268 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
| 0 | 269 *((buf)+fmt->Rshift/8) = r; \ |
| 270 *((buf)+fmt->Gshift/8) = g; \ | |
| 271 *((buf)+fmt->Bshift/8) = b; \ | |
| 272 } else { \ | |
| 273 *((buf)+2-fmt->Rshift/8) = r; \ | |
| 274 *((buf)+2-fmt->Gshift/8) = g; \ | |
| 275 *((buf)+2-fmt->Bshift/8) = b; \ | |
| 276 } \ | |
| 277 } \ | |
| 278 break; \ | |
| 279 \ | |
| 280 case 4: { \ | |
|
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281 Uint32 Pixel; \ |
| 0 | 282 \ |
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283 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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284 *((Uint32 *)(buf)) = Pixel; \ |
| 0 | 285 } \ |
| 286 break; \ | |
| 287 } \ | |
| 288 } | |
| 289 #define ASSEMBLE_RGB_AMASK(buf, bpp, fmt, r, g, b, Amask) \ | |
| 290 { \ | |
| 291 switch (bpp) { \ | |
| 292 case 2: { \ | |
| 293 Uint16 *bufp; \ | |
|
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294 Uint16 Pixel; \ |
| 0 | 295 \ |
| 296 bufp = (Uint16 *)buf; \ | |
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297 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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298 *bufp = Pixel | (*bufp & Amask); \ |
| 0 | 299 } \ |
| 300 break; \ | |
| 301 \ | |
| 302 case 3: { \ | |
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303 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
| 0 | 304 *((buf)+fmt->Rshift/8) = r; \ |
| 305 *((buf)+fmt->Gshift/8) = g; \ | |
| 306 *((buf)+fmt->Bshift/8) = b; \ | |
| 307 } else { \ | |
| 308 *((buf)+2-fmt->Rshift/8) = r; \ | |
| 309 *((buf)+2-fmt->Gshift/8) = g; \ | |
| 310 *((buf)+2-fmt->Bshift/8) = b; \ | |
| 311 } \ | |
| 312 } \ | |
| 313 break; \ | |
| 314 \ | |
| 315 case 4: { \ | |
| 316 Uint32 *bufp; \ | |
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317 Uint32 Pixel; \ |
| 0 | 318 \ |
| 319 bufp = (Uint32 *)buf; \ | |
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320 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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321 *bufp = Pixel | (*bufp & Amask); \ |
| 0 | 322 } \ |
| 323 break; \ | |
| 324 } \ | |
| 325 } | |
| 326 | |
| 327 /* FIXME: Should we rescale alpha into 0..255 here? */ | |
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328 #define RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a) \ |
| 0 | 329 { \ |
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330 r = ((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss; \ |
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331 g = ((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss; \ |
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332 b = ((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss; \ |
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333 a = ((Pixel&fmt->Amask)>>fmt->Ashift)<<fmt->Aloss; \ |
| 0 | 334 } |
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335 #define RGBA_FROM_8888(Pixel, fmt, r, g, b, a) \ |
| 0 | 336 { \ |
|
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337 r = (Pixel&fmt->Rmask)>>fmt->Rshift; \ |
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338 g = (Pixel&fmt->Gmask)>>fmt->Gshift; \ |
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339 b = (Pixel&fmt->Bmask)>>fmt->Bshift; \ |
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340 a = (Pixel&fmt->Amask)>>fmt->Ashift; \ |
| 0 | 341 } |
|
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342 #define RGBA_FROM_RGBA8888(Pixel, r, g, b, a) \ |
| 0 | 343 { \ |
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344 r = (Pixel>>24); \ |
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345 g = ((Pixel>>16)&0xFF); \ |
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346 b = ((Pixel>>8)&0xFF); \ |
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347 a = (Pixel&0xFF); \ |
| 0 | 348 } |
|
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349 #define RGBA_FROM_ARGB8888(Pixel, r, g, b, a) \ |
| 0 | 350 { \ |
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351 r = ((Pixel>>16)&0xFF); \ |
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352 g = ((Pixel>>8)&0xFF); \ |
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353 b = (Pixel&0xFF); \ |
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354 a = (Pixel>>24); \ |
| 0 | 355 } |
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356 #define RGBA_FROM_ABGR8888(Pixel, r, g, b, a) \ |
| 0 | 357 { \ |
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358 r = (Pixel&0xFF); \ |
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359 g = ((Pixel>>8)&0xFF); \ |
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360 b = ((Pixel>>16)&0xFF); \ |
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361 a = (Pixel>>24); \ |
| 0 | 362 } |
|
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363 #define RGBA_FROM_BGRA8888(Pixel, r, g, b, a) \ |
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364 { \ |
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365 r = ((Pixel>>8)&0xFF); \ |
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366 g = ((Pixel>>16)&0xFF); \ |
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367 b = (Pixel>>24); \ |
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368 a = (Pixel&0xFF); \ |
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369 } |
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370 #define DISEMBLE_RGBA(buf, bpp, fmt, Pixel, r, g, b, a) \ |
| 0 | 371 do { \ |
| 372 switch (bpp) { \ | |
| 373 case 2: \ | |
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374 Pixel = *((Uint16 *)(buf)); \ |
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375 RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a); \ |
| 0 | 376 break; \ |
| 377 \ | |
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378 case 3: { \ |
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379 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
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380 r = *((buf)+fmt->Rshift/8); \ |
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381 g = *((buf)+fmt->Gshift/8); \ |
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382 b = *((buf)+fmt->Bshift/8); \ |
| 0 | 383 } else { \ |
|
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384 r = *((buf)+2-fmt->Rshift/8); \ |
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385 g = *((buf)+2-fmt->Gshift/8); \ |
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386 b = *((buf)+2-fmt->Bshift/8); \ |
| 0 | 387 } \ |
|
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388 a = 0xFF; \ |
| 0 | 389 } \ |
| 390 break; \ | |
| 391 \ | |
| 392 case 4: \ | |
|
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393 Pixel = *((Uint32 *)(buf)); \ |
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394 RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a); \ |
| 0 | 395 break; \ |
| 396 \ | |
| 397 default: \ | |
|
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398 Pixel; /* stop gcc complaints */ \ |
| 0 | 399 break; \ |
| 400 } \ | |
|
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401 } while (0) |
| 0 | 402 |
| 403 /* FIXME: this isn't correct, especially for Alpha (maximum != 255) */ | |
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404 #define PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a) \ |
| 0 | 405 { \ |
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406 Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \ |
| 0 | 407 ((g>>fmt->Gloss)<<fmt->Gshift)| \ |
| 408 ((b>>fmt->Bloss)<<fmt->Bshift)| \ | |
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409 ((a>>fmt->Aloss)<<fmt->Ashift); \ |
| 0 | 410 } |
| 411 #define ASSEMBLE_RGBA(buf, bpp, fmt, r, g, b, a) \ | |
| 412 { \ | |
| 413 switch (bpp) { \ | |
| 414 case 2: { \ | |
|
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415 Uint16 Pixel; \ |
| 0 | 416 \ |
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417 PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a); \ |
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418 *((Uint16 *)(buf)) = Pixel; \ |
| 0 | 419 } \ |
| 420 break; \ | |
| 421 \ | |
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422 case 3: { \ |
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423 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
| 0 | 424 *((buf)+fmt->Rshift/8) = r; \ |
| 425 *((buf)+fmt->Gshift/8) = g; \ | |
| 426 *((buf)+fmt->Bshift/8) = b; \ | |
| 427 } else { \ | |
| 428 *((buf)+2-fmt->Rshift/8) = r; \ | |
| 429 *((buf)+2-fmt->Gshift/8) = g; \ | |
| 430 *((buf)+2-fmt->Bshift/8) = b; \ | |
| 431 } \ | |
| 432 } \ | |
| 433 break; \ | |
| 434 \ | |
| 435 case 4: { \ | |
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436 Uint32 Pixel; \ |
| 0 | 437 \ |
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438 PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a); \ |
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439 *((Uint32 *)(buf)) = Pixel; \ |
| 0 | 440 } \ |
| 441 break; \ | |
| 442 } \ | |
| 443 } | |
| 444 | |
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445 /* Blend the RGB values of two Pixels based on a source alpha value */ |
| 0 | 446 #define ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB) \ |
| 447 do { \ | |
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448 dR = ((((int)(sR-dR)*(int)A)/255)+dR); \ |
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449 dG = ((((int)(sG-dG)*(int)A)/255)+dG); \ |
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450 dB = ((((int)(sB-dB)*(int)A)/255)+dB); \ |
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451 } while(0) |
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452 |
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453 |
| 0 | 454 /* This is a very useful loop for optimizing blitters */ |
|
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455 #if defined(_MSC_VER) && (_MSC_VER == 1300) |
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456 /* There's a bug in the Visual C++ 7 optimizer when compiling this code */ |
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457 #else |
| 0 | 458 #define USE_DUFFS_LOOP |
|
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459 #endif |
| 0 | 460 #ifdef USE_DUFFS_LOOP |
| 461 | |
| 462 /* 8-times unrolled loop */ | |
| 463 #define DUFFS_LOOP8(pixel_copy_increment, width) \ | |
| 464 { int n = (width+7)/8; \ | |
|
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465 switch (width & 7) { \ |
| 0 | 466 case 0: do { pixel_copy_increment; \ |
| 467 case 7: pixel_copy_increment; \ | |
| 468 case 6: pixel_copy_increment; \ | |
| 469 case 5: pixel_copy_increment; \ | |
| 470 case 4: 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 | |
| 478 /* 4-times unrolled loop */ | |
| 479 #define DUFFS_LOOP4(pixel_copy_increment, width) \ | |
| 480 { int n = (width+3)/4; \ | |
|
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481 switch (width & 3) { \ |
| 0 | 482 case 0: do { pixel_copy_increment; \ |
| 483 case 3: pixel_copy_increment; \ | |
| 484 case 2: pixel_copy_increment; \ | |
| 485 case 1: pixel_copy_increment; \ | |
|
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486 } while (--n > 0); \ |
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487 } \ |
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488 } |
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489 |
| 0 | 490 /* Use the 8-times version of the loop by default */ |
| 491 #define DUFFS_LOOP(pixel_copy_increment, width) \ | |
| 492 DUFFS_LOOP8(pixel_copy_increment, width) | |
| 493 | |
|
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494 /* Special version of Duff's device for even more optimization */ |
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495 #define DUFFS_LOOP_124(pixel_copy_increment1, \ |
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496 pixel_copy_increment2, \ |
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497 pixel_copy_increment4, width) \ |
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498 { int n = width; \ |
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499 if (n & 1) { \ |
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500 pixel_copy_increment1; n -= 1; \ |
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501 } \ |
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502 if (n & 2) { \ |
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503 pixel_copy_increment2; n -= 2; \ |
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504 } \ |
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505 if (n) { \ |
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506 n = (n+7)/ 8; \ |
|
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507 switch (n & 4) { \ |
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508 case 0: do { pixel_copy_increment4; \ |
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509 case 4: pixel_copy_increment4; \ |
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510 } while (--n > 0); \ |
|
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511 } \ |
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512 } \ |
|
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513 } |
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514 |
|
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515 #else |
|
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516 |
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517 /* Don't use Duff's device to unroll loops */ |
| 0 | 518 #define DUFFS_LOOP(pixel_copy_increment, width) \ |
| 519 { int n; \ | |
| 520 for ( n=width; n > 0; --n ) { \ | |
| 521 pixel_copy_increment; \ | |
| 522 } \ | |
| 523 } | |
| 524 #define DUFFS_LOOP8(pixel_copy_increment, width) \ | |
| 525 DUFFS_LOOP(pixel_copy_increment, width) | |
| 526 #define DUFFS_LOOP4(pixel_copy_increment, width) \ | |
| 527 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
|
528 #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
|
529 pixel_copy_increment2, \ |
|
ff602fdfdedc
Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents:
2899
diff
changeset
|
530 pixel_copy_increment4, width) \ |
|
ff602fdfdedc
Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents:
2899
diff
changeset
|
531 DUFFS_LOOP(pixel_copy_increment1, width) |
| 0 | 532 |
| 533 #endif /* USE_DUFFS_LOOP */ | |
| 534 | |
| 535 /* Prevent Visual C++ 6.0 from printing out stupid warnings */ | |
| 536 #if defined(_MSC_VER) && (_MSC_VER >= 600) | |
| 537 #pragma warning(disable: 4550) | |
| 538 #endif | |
| 539 | |
| 540 #endif /* _SDL_blit_h */ | |
|
2898
e40448bc7727
Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
541 |
|
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
|
542 /* vi: set ts=4 sw=4 expandtab: */ |