Mercurial > sdl-ios-xcode
annotate src/video/SDL_blit.h @ 5150:ad50b3db78bd
The rendering functions take a context so it's clear what window they're drawing to. This also potentially opens to the door to multi-threaded rendering in the future.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 01 Feb 2011 19:19:43 -0800 |
| parents | e743b9c3f6d6 |
| children | d72793305335 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
| 3697 | 3 Copyright (C) 1997-2010 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
|
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6 modify it under the terms of the GNU Lesser General Public |
| 0 | 7 License as published by the Free Software Foundation; either |
|
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8 version 2.1 of the License, or (at your option) any later version. |
| 0 | 9 |
| 10 This library is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
|
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13 Lesser General Public License for more details. |
| 0 | 14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
| 19 Sam Lantinga | |
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20 slouken@libsdl.org |
| 0 | 21 */ |
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22 #include "SDL_config.h" |
| 0 | 23 |
| 24 #ifndef _SDL_blit_h | |
| 25 #define _SDL_blit_h | |
| 26 | |
| 4426 | 27 #ifdef __MINGW32__ |
| 28 #include <_mingw.h> | |
| 29 #endif | |
| 30 | |
| 31 #if defined(__MINGW32__) && defined(__MINGW64_VERSION_MAJOR) | |
| 32 #include <intrin.h> | |
| 33 #else | |
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34 #ifdef __MMX__ |
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35 #include <mmintrin.h> |
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36 #endif |
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37 #ifdef __3dNOW__ |
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38 #include <mm3dnow.h> |
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39 #endif |
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40 #ifdef __SSE__ |
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41 #include <xmmintrin.h> |
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42 #endif |
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43 #ifdef __SSE2__ |
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44 #include <emmintrin.h> |
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45 #endif |
| 4426 | 46 #endif |
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47 |
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48 #include "SDL_cpuinfo.h" |
| 0 | 49 #include "SDL_endian.h" |
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50 #include "SDL_video.h" |
| 0 | 51 |
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52 /* SDL blit copy flags */ |
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53 #define SDL_COPY_MODULATE_COLOR 0x00000001 |
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54 #define SDL_COPY_MODULATE_ALPHA 0x00000002 |
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55 #define SDL_COPY_BLEND 0x00000010 |
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56 #define SDL_COPY_ADD 0x00000020 |
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57 #define SDL_COPY_COLORKEY 0x00000100 |
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58 #define SDL_COPY_NEAREST 0x00000200 |
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59 #define SDL_COPY_RLE_DESIRED 0x00001000 |
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60 #define SDL_COPY_RLE_COLORKEY 0x00002000 |
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61 #define SDL_COPY_RLE_ALPHAKEY 0x00004000 |
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62 #define SDL_COPY_RLE_MASK (SDL_COPY_RLE_DESIRED|SDL_COPY_RLE_COLORKEY|SDL_COPY_RLE_ALPHAKEY) |
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63 |
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64 /* SDL blit CPU flags */ |
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65 #define SDL_CPU_ANY 0x00000000 |
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66 #define SDL_CPU_MMX 0x00000001 |
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67 #define SDL_CPU_3DNOW 0x00000002 |
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68 #define SDL_CPU_SSE 0x00000004 |
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69 #define SDL_CPU_SSE2 0x00000008 |
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70 #define SDL_CPU_ALTIVEC_PREFETCH 0x00000010 |
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71 #define SDL_CPU_ALTIVEC_NOPREFETCH 0x00000020 |
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72 |
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73 typedef struct |
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74 { |
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75 Uint8 *src; |
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76 int src_w, src_h; |
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77 int src_pitch; |
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78 int src_skip; |
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79 Uint8 *dst; |
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80 int dst_w, dst_h; |
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81 int dst_pitch; |
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82 int dst_skip; |
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83 SDL_PixelFormat *src_fmt; |
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84 SDL_PixelFormat *dst_fmt; |
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85 Uint8 *table; |
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86 int flags; |
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87 Uint32 colorkey; |
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88 Uint8 r, g, b, a; |
| 0 | 89 } SDL_BlitInfo; |
| 90 | |
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91 typedef void (SDLCALL * SDL_BlitFunc) (SDL_BlitInfo * info); |
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92 |
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93 typedef struct |
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94 { |
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95 Uint32 src_format; |
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96 Uint32 dst_format; |
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97 int flags; |
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98 int cpu; |
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99 SDL_BlitFunc func; |
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100 } SDL_BlitFuncEntry; |
| 0 | 101 |
| 102 /* Blit mapping definition */ | |
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103 typedef struct SDL_BlitMap |
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104 { |
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105 SDL_Surface *dst; |
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106 int identity; |
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107 SDL_blit blit; |
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108 void *data; |
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109 SDL_BlitInfo info; |
| 0 | 110 |
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111 /* the version count matches the destination; mismatch indicates |
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112 an invalid mapping */ |
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113 unsigned int format_version; |
| 0 | 114 } SDL_BlitMap; |
| 115 | |
| 116 /* Functions found in SDL_blit.c */ | |
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117 extern int SDL_CalculateBlit(SDL_Surface * surface); |
| 0 | 118 |
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119 /* Functions found in SDL_blit_*.c */ |
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120 extern SDL_BlitFunc SDL_CalculateBlit0(SDL_Surface * surface); |
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121 extern SDL_BlitFunc SDL_CalculateBlit1(SDL_Surface * surface); |
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122 extern SDL_BlitFunc SDL_CalculateBlitN(SDL_Surface * surface); |
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123 extern SDL_BlitFunc SDL_CalculateBlitA(SDL_Surface * surface); |
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124 |
| 0 | 125 /* |
| 126 * Useful macros for blitting routines | |
| 127 */ | |
| 128 | |
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129 #if defined(__GNUC__) |
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130 #define DECLARE_ALIGNED(t,v,a) t __attribute__((aligned(a))) v |
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131 #elif defined(_MSC_VER) |
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132 #define DECLARE_ALIGNED(t,v,a) __declspec(align(a)) t v |
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133 #else |
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134 #define DECLARE_ALIGNED(t,v,a) t v |
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135 #endif |
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136 |
| 0 | 137 #define FORMAT_EQUAL(A, B) \ |
| 138 ((A)->BitsPerPixel == (B)->BitsPerPixel \ | |
| 139 && ((A)->Rmask == (B)->Rmask) && ((A)->Amask == (B)->Amask)) | |
| 140 | |
| 141 /* Load pixel of the specified format from a buffer and get its R-G-B values */ | |
| 142 /* FIXME: rescale values to 0..255 here? */ | |
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143 #define RGB_FROM_PIXEL(Pixel, fmt, r, g, b) \ |
| 0 | 144 { \ |
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145 r = (((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss); \ |
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146 g = (((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss); \ |
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147 b = (((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss); \ |
| 0 | 148 } |
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149 #define RGB_FROM_RGB565(Pixel, r, g, b) \ |
| 0 | 150 { \ |
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151 r = (((Pixel&0xF800)>>11)<<3); \ |
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152 g = (((Pixel&0x07E0)>>5)<<2); \ |
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153 b = ((Pixel&0x001F)<<3); \ |
| 0 | 154 } |
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155 #define RGB_FROM_RGB555(Pixel, r, g, b) \ |
| 0 | 156 { \ |
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157 r = (((Pixel&0x7C00)>>10)<<3); \ |
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158 g = (((Pixel&0x03E0)>>5)<<3); \ |
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159 b = ((Pixel&0x001F)<<3); \ |
| 0 | 160 } |
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161 #define RGB_FROM_RGB888(Pixel, r, g, b) \ |
| 0 | 162 { \ |
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163 r = ((Pixel&0xFF0000)>>16); \ |
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164 g = ((Pixel&0xFF00)>>8); \ |
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165 b = (Pixel&0xFF); \ |
| 0 | 166 } |
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167 #define RETRIEVE_RGB_PIXEL(buf, bpp, Pixel) \ |
| 0 | 168 do { \ |
| 169 switch (bpp) { \ | |
| 170 case 2: \ | |
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171 Pixel = *((Uint16 *)(buf)); \ |
| 0 | 172 break; \ |
| 173 \ | |
| 174 case 3: { \ | |
| 175 Uint8 *B = (Uint8 *)(buf); \ | |
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176 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
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177 Pixel = B[0] + (B[1] << 8) + (B[2] << 16); \ |
| 0 | 178 } else { \ |
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179 Pixel = (B[0] << 16) + (B[1] << 8) + B[2]; \ |
| 0 | 180 } \ |
| 181 } \ | |
| 182 break; \ | |
| 183 \ | |
| 184 case 4: \ | |
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185 Pixel = *((Uint32 *)(buf)); \ |
| 0 | 186 break; \ |
| 187 \ | |
| 188 default: \ | |
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189 Pixel; /* stop gcc complaints */ \ |
| 0 | 190 break; \ |
| 191 } \ | |
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192 } while (0) |
| 0 | 193 |
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194 #define DISEMBLE_RGB(buf, bpp, fmt, Pixel, r, g, b) \ |
| 0 | 195 do { \ |
| 196 switch (bpp) { \ | |
| 197 case 2: \ | |
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198 Pixel = *((Uint16 *)(buf)); \ |
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199 RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \ |
| 0 | 200 break; \ |
| 201 \ | |
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202 case 3: { \ |
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203 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
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204 r = *((buf)+fmt->Rshift/8); \ |
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205 g = *((buf)+fmt->Gshift/8); \ |
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206 b = *((buf)+fmt->Bshift/8); \ |
| 0 | 207 } else { \ |
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208 r = *((buf)+2-fmt->Rshift/8); \ |
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209 g = *((buf)+2-fmt->Gshift/8); \ |
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210 b = *((buf)+2-fmt->Bshift/8); \ |
| 0 | 211 } \ |
| 212 } \ | |
| 213 break; \ | |
| 214 \ | |
| 215 case 4: \ | |
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216 Pixel = *((Uint32 *)(buf)); \ |
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217 RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \ |
| 0 | 218 break; \ |
| 219 \ | |
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220 default: \ |
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221 Pixel; /* stop gcc complaints */ \ |
| 0 | 222 break; \ |
| 223 } \ | |
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224 } while (0) |
| 0 | 225 |
| 226 /* Assemble R-G-B values into a specified pixel format and store them */ | |
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227 #define PIXEL_FROM_RGB(Pixel, fmt, r, g, b) \ |
| 0 | 228 { \ |
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229 Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \ |
| 0 | 230 ((g>>fmt->Gloss)<<fmt->Gshift)| \ |
| 231 ((b>>fmt->Bloss)<<fmt->Bshift); \ | |
| 232 } | |
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233 #define RGB565_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 234 { \ |
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235 Pixel = ((r>>3)<<11)|((g>>2)<<5)|(b>>3); \ |
| 0 | 236 } |
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237 #define RGB555_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 238 { \ |
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239 Pixel = ((r>>3)<<10)|((g>>3)<<5)|(b>>3); \ |
| 0 | 240 } |
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241 #define RGB888_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 242 { \ |
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243 Pixel = (r<<16)|(g<<8)|b; \ |
| 0 | 244 } |
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245 #define ARGB8888_FROM_RGBA(Pixel, r, g, b, a) \ |
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246 { \ |
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247 Pixel = (a<<24)|(r<<16)|(g<<8)|b; \ |
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248 } |
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249 #define RGBA8888_FROM_RGBA(Pixel, r, g, b, a) \ |
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250 { \ |
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251 Pixel = (r<<24)|(g<<16)|(b<<8)|a; \ |
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252 } |
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253 #define ABGR8888_FROM_RGBA(Pixel, r, g, b, a) \ |
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254 { \ |
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255 Pixel = (a<<24)|(b<<16)|(g<<8)|r; \ |
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256 } |
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257 #define BGRA8888_FROM_RGBA(Pixel, r, g, b, a) \ |
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258 { \ |
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259 Pixel = (b<<24)|(g<<16)|(r<<8)|a; \ |
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260 } |
| 0 | 261 #define ASSEMBLE_RGB(buf, bpp, fmt, r, g, b) \ |
| 262 { \ | |
| 263 switch (bpp) { \ | |
| 264 case 2: { \ | |
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265 Uint16 Pixel; \ |
| 0 | 266 \ |
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267 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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268 *((Uint16 *)(buf)) = Pixel; \ |
| 0 | 269 } \ |
| 270 break; \ | |
| 271 \ | |
| 272 case 3: { \ | |
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273 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
| 0 | 274 *((buf)+fmt->Rshift/8) = r; \ |
| 275 *((buf)+fmt->Gshift/8) = g; \ | |
| 276 *((buf)+fmt->Bshift/8) = b; \ | |
| 277 } else { \ | |
| 278 *((buf)+2-fmt->Rshift/8) = r; \ | |
| 279 *((buf)+2-fmt->Gshift/8) = g; \ | |
| 280 *((buf)+2-fmt->Bshift/8) = b; \ | |
| 281 } \ | |
| 282 } \ | |
| 283 break; \ | |
| 284 \ | |
| 285 case 4: { \ | |
|
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286 Uint32 Pixel; \ |
| 0 | 287 \ |
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288 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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289 *((Uint32 *)(buf)) = Pixel; \ |
| 0 | 290 } \ |
| 291 break; \ | |
| 292 } \ | |
| 293 } | |
| 294 #define ASSEMBLE_RGB_AMASK(buf, bpp, fmt, r, g, b, Amask) \ | |
| 295 { \ | |
| 296 switch (bpp) { \ | |
| 297 case 2: { \ | |
| 298 Uint16 *bufp; \ | |
|
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299 Uint16 Pixel; \ |
| 0 | 300 \ |
| 301 bufp = (Uint16 *)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 case 3: { \ | |
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308 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
| 0 | 309 *((buf)+fmt->Rshift/8) = r; \ |
| 310 *((buf)+fmt->Gshift/8) = g; \ | |
| 311 *((buf)+fmt->Bshift/8) = b; \ | |
| 312 } else { \ | |
| 313 *((buf)+2-fmt->Rshift/8) = r; \ | |
| 314 *((buf)+2-fmt->Gshift/8) = g; \ | |
| 315 *((buf)+2-fmt->Bshift/8) = b; \ | |
| 316 } \ | |
| 317 } \ | |
| 318 break; \ | |
| 319 \ | |
| 320 case 4: { \ | |
| 321 Uint32 *bufp; \ | |
|
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322 Uint32 Pixel; \ |
| 0 | 323 \ |
| 324 bufp = (Uint32 *)buf; \ | |
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325 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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326 *bufp = Pixel | (*bufp & Amask); \ |
| 0 | 327 } \ |
| 328 break; \ | |
| 329 } \ | |
| 330 } | |
| 331 | |
| 332 /* FIXME: Should we rescale alpha into 0..255 here? */ | |
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333 #define RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a) \ |
| 0 | 334 { \ |
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335 r = ((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss; \ |
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336 g = ((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss; \ |
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337 b = ((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss; \ |
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338 a = ((Pixel&fmt->Amask)>>fmt->Ashift)<<fmt->Aloss; \ |
| 0 | 339 } |
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340 #define RGBA_FROM_8888(Pixel, fmt, r, g, b, a) \ |
| 0 | 341 { \ |
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342 r = (Pixel&fmt->Rmask)>>fmt->Rshift; \ |
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343 g = (Pixel&fmt->Gmask)>>fmt->Gshift; \ |
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344 b = (Pixel&fmt->Bmask)>>fmt->Bshift; \ |
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345 a = (Pixel&fmt->Amask)>>fmt->Ashift; \ |
| 0 | 346 } |
|
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347 #define RGBA_FROM_RGBA8888(Pixel, r, g, b, a) \ |
| 0 | 348 { \ |
|
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349 r = (Pixel>>24); \ |
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350 g = ((Pixel>>16)&0xFF); \ |
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351 b = ((Pixel>>8)&0xFF); \ |
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352 a = (Pixel&0xFF); \ |
| 0 | 353 } |
|
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354 #define RGBA_FROM_ARGB8888(Pixel, r, g, b, a) \ |
| 0 | 355 { \ |
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356 r = ((Pixel>>16)&0xFF); \ |
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357 g = ((Pixel>>8)&0xFF); \ |
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358 b = (Pixel&0xFF); \ |
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359 a = (Pixel>>24); \ |
| 0 | 360 } |
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361 #define RGBA_FROM_ABGR8888(Pixel, r, g, b, a) \ |
| 0 | 362 { \ |
|
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363 r = (Pixel&0xFF); \ |
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364 g = ((Pixel>>8)&0xFF); \ |
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365 b = ((Pixel>>16)&0xFF); \ |
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366 a = (Pixel>>24); \ |
| 0 | 367 } |
|
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368 #define RGBA_FROM_BGRA8888(Pixel, r, g, b, a) \ |
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369 { \ |
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370 r = ((Pixel>>8)&0xFF); \ |
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371 g = ((Pixel>>16)&0xFF); \ |
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372 b = (Pixel>>24); \ |
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373 a = (Pixel&0xFF); \ |
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374 } |
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375 #define DISEMBLE_RGBA(buf, bpp, fmt, Pixel, r, g, b, a) \ |
| 0 | 376 do { \ |
| 377 switch (bpp) { \ | |
| 378 case 2: \ | |
|
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379 Pixel = *((Uint16 *)(buf)); \ |
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380 RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a); \ |
| 0 | 381 break; \ |
| 382 \ | |
|
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383 case 3: { \ |
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384 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
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385 r = *((buf)+fmt->Rshift/8); \ |
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386 g = *((buf)+fmt->Gshift/8); \ |
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387 b = *((buf)+fmt->Bshift/8); \ |
| 0 | 388 } else { \ |
|
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389 r = *((buf)+2-fmt->Rshift/8); \ |
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390 g = *((buf)+2-fmt->Gshift/8); \ |
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391 b = *((buf)+2-fmt->Bshift/8); \ |
| 0 | 392 } \ |
|
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393 a = 0xFF; \ |
| 0 | 394 } \ |
| 395 break; \ | |
| 396 \ | |
| 397 case 4: \ | |
|
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398 Pixel = *((Uint32 *)(buf)); \ |
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399 RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a); \ |
| 0 | 400 break; \ |
| 401 \ | |
| 402 default: \ | |
|
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403 Pixel; /* stop gcc complaints */ \ |
| 0 | 404 break; \ |
| 405 } \ | |
|
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406 } while (0) |
| 0 | 407 |
| 408 /* FIXME: this isn't correct, especially for Alpha (maximum != 255) */ | |
|
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409 #define PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a) \ |
| 0 | 410 { \ |
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411 Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \ |
| 0 | 412 ((g>>fmt->Gloss)<<fmt->Gshift)| \ |
| 413 ((b>>fmt->Bloss)<<fmt->Bshift)| \ | |
|
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414 ((a>>fmt->Aloss)<<fmt->Ashift); \ |
| 0 | 415 } |
| 416 #define ASSEMBLE_RGBA(buf, bpp, fmt, r, g, b, a) \ | |
| 417 { \ | |
| 418 switch (bpp) { \ | |
| 419 case 2: { \ | |
|
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420 Uint16 Pixel; \ |
| 0 | 421 \ |
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422 PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a); \ |
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423 *((Uint16 *)(buf)) = Pixel; \ |
| 0 | 424 } \ |
| 425 break; \ | |
| 426 \ | |
|
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427 case 3: { \ |
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428 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
| 0 | 429 *((buf)+fmt->Rshift/8) = r; \ |
| 430 *((buf)+fmt->Gshift/8) = g; \ | |
| 431 *((buf)+fmt->Bshift/8) = b; \ | |
| 432 } else { \ | |
| 433 *((buf)+2-fmt->Rshift/8) = r; \ | |
| 434 *((buf)+2-fmt->Gshift/8) = g; \ | |
| 435 *((buf)+2-fmt->Bshift/8) = b; \ | |
| 436 } \ | |
| 437 } \ | |
| 438 break; \ | |
| 439 \ | |
| 440 case 4: { \ | |
|
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441 Uint32 Pixel; \ |
| 0 | 442 \ |
|
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443 PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a); \ |
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444 *((Uint32 *)(buf)) = Pixel; \ |
| 0 | 445 } \ |
| 446 break; \ | |
| 447 } \ | |
| 448 } | |
| 449 | |
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450 /* Blend the RGB values of two Pixels based on a source alpha value */ |
| 0 | 451 #define ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB) \ |
| 452 do { \ | |
|
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453 dR = ((((int)(sR-dR)*(int)A)/255)+dR); \ |
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454 dG = ((((int)(sG-dG)*(int)A)/255)+dG); \ |
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455 dB = ((((int)(sB-dB)*(int)A)/255)+dB); \ |
|
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456 } while(0) |
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457 |
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458 |
| 0 | 459 /* This is a very useful loop for optimizing blitters */ |
|
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460 #if defined(_MSC_VER) && (_MSC_VER == 1300) |
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461 /* There's a bug in the Visual C++ 7 optimizer when compiling this code */ |
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462 #else |
| 0 | 463 #define USE_DUFFS_LOOP |
|
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464 #endif |
| 0 | 465 #ifdef USE_DUFFS_LOOP |
| 466 | |
| 467 /* 8-times unrolled loop */ | |
| 468 #define DUFFS_LOOP8(pixel_copy_increment, width) \ | |
| 469 { int n = (width+7)/8; \ | |
|
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470 switch (width & 7) { \ |
| 0 | 471 case 0: do { pixel_copy_increment; \ |
| 472 case 7: pixel_copy_increment; \ | |
| 473 case 6: pixel_copy_increment; \ | |
| 474 case 5: pixel_copy_increment; \ | |
| 475 case 4: pixel_copy_increment; \ | |
| 476 case 3: pixel_copy_increment; \ | |
| 477 case 2: pixel_copy_increment; \ | |
| 478 case 1: pixel_copy_increment; \ | |
| 479 } while ( --n > 0 ); \ | |
| 480 } \ | |
| 481 } | |
| 482 | |
| 483 /* 4-times unrolled loop */ | |
| 484 #define DUFFS_LOOP4(pixel_copy_increment, width) \ | |
| 485 { int n = (width+3)/4; \ | |
|
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486 switch (width & 3) { \ |
| 0 | 487 case 0: do { pixel_copy_increment; \ |
| 488 case 3: pixel_copy_increment; \ | |
| 489 case 2: pixel_copy_increment; \ | |
| 490 case 1: 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 |
| 0 | 495 /* Use the 8-times version of the loop by default */ |
| 496 #define DUFFS_LOOP(pixel_copy_increment, width) \ | |
| 497 DUFFS_LOOP8(pixel_copy_increment, width) | |
| 498 | |
|
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499 /* Special version of Duff's device for even more optimization */ |
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500 #define DUFFS_LOOP_124(pixel_copy_increment1, \ |
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501 pixel_copy_increment2, \ |
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502 pixel_copy_increment4, width) \ |
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503 { int n = width; \ |
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504 if (n & 1) { \ |
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505 pixel_copy_increment1; n -= 1; \ |
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506 } \ |
|
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507 if (n & 2) { \ |
|
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508 pixel_copy_increment2; n -= 2; \ |
|
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509 } \ |
|
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510 if (n) { \ |
|
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511 n = (n+7)/ 8; \ |
|
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512 switch (n & 4) { \ |
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513 case 0: do { pixel_copy_increment4; \ |
|
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514 case 4: pixel_copy_increment4; \ |
|
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515 } while (--n > 0); \ |
|
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516 } \ |
|
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517 } \ |
|
689
5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
diff
changeset
|
518 } |
|
5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
diff
changeset
|
519 |
|
3035
ff602fdfdedc
Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents:
2899
diff
changeset
|
520 #else |
|
689
5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
diff
changeset
|
521 |
|
5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
diff
changeset
|
522 /* Don't use Duff's device to unroll loops */ |
| 0 | 523 #define DUFFS_LOOP(pixel_copy_increment, width) \ |
| 524 { int n; \ | |
| 525 for ( n=width; n > 0; --n ) { \ | |
| 526 pixel_copy_increment; \ | |
| 527 } \ | |
| 528 } | |
| 529 #define DUFFS_LOOP8(pixel_copy_increment, width) \ | |
| 530 DUFFS_LOOP(pixel_copy_increment, width) | |
| 531 #define DUFFS_LOOP4(pixel_copy_increment, width) \ | |
| 532 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
|
533 #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
|
534 pixel_copy_increment2, \ |
|
ff602fdfdedc
Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents:
2899
diff
changeset
|
535 pixel_copy_increment4, width) \ |
|
ff602fdfdedc
Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents:
2899
diff
changeset
|
536 DUFFS_LOOP(pixel_copy_increment1, width) |
| 0 | 537 |
| 538 #endif /* USE_DUFFS_LOOP */ | |
| 539 | |
| 540 /* Prevent Visual C++ 6.0 from printing out stupid warnings */ | |
| 541 #if defined(_MSC_VER) && (_MSC_VER >= 600) | |
| 542 #pragma warning(disable: 4550) | |
| 543 #endif | |
| 544 | |
| 545 #endif /* _SDL_blit_h */ | |
|
2898
e40448bc7727
Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
546 |
|
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
|
547 /* vi: set ts=4 sw=4 expandtab: */ |