Mercurial > sdl-ios-xcode
annotate src/video/SDL_blit.h @ 3474:1edb86163d62
Of COURSE that trick wouldn't work on all renderers. Fall back to something for now, hopefully figure out a better way to do this later.
If we have to, we can use vertical line and horizontal line textures for vertical and horizontal lines, and then create custom textures for diagonal lines and software render those. It's terrible, but at least it would be pixel perfect.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sat, 21 Nov 2009 07:22:59 +0000 |
| parents | dc2911c207e4 |
| children | 83910f4c373f |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
| 2859 | 3 Copyright (C) 1997-2009 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
|
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6 modify it under the terms of the GNU Lesser General Public |
| 0 | 7 License as published by the Free Software Foundation; either |
|
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8 version 2.1 of the License, or (at your option) any later version. |
| 0 | 9 |
| 10 This library is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
|
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13 Lesser General Public License for more details. |
| 0 | 14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
| 19 Sam Lantinga | |
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20 slouken@libsdl.org |
| 0 | 21 */ |
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22 #include "SDL_config.h" |
| 0 | 23 |
| 24 #ifndef _SDL_blit_h | |
| 25 #define _SDL_blit_h | |
| 26 | |
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27 #ifdef __MMX__ |
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28 #include <mmintrin.h> |
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29 #endif |
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30 #ifdef __3dNOW__ |
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31 #include <mm3dnow.h> |
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32 #endif |
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33 #ifdef __SSE__ |
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34 #include <xmmintrin.h> |
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35 #endif |
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36 #ifdef __SSE2__ |
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37 #include <emmintrin.h> |
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38 #endif |
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39 |
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40 #include "SDL_cpuinfo.h" |
| 0 | 41 #include "SDL_endian.h" |
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42 #include "SDL_video.h" |
| 0 | 43 |
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44 /* SDL blit copy flags */ |
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45 #define SDL_COPY_MODULATE_COLOR 0x00000001 |
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46 #define SDL_COPY_MODULATE_ALPHA 0x00000002 |
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47 #define SDL_COPY_MASK 0x00000010 |
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48 #define SDL_COPY_BLEND 0x00000020 |
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49 #define SDL_COPY_ADD 0x00000040 |
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50 #define SDL_COPY_MOD 0x00000080 |
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51 #define SDL_COPY_COLORKEY 0x00000100 |
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52 #define SDL_COPY_NEAREST 0x00000200 |
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53 #define SDL_COPY_RLE_DESIRED 0x00001000 |
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54 #define SDL_COPY_RLE_COLORKEY 0x00002000 |
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55 #define SDL_COPY_RLE_ALPHAKEY 0x00004000 |
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56 #define SDL_COPY_RLE_MASK (SDL_COPY_RLE_DESIRED|SDL_COPY_RLE_COLORKEY|SDL_COPY_RLE_ALPHAKEY) |
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57 |
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58 /* SDL blit CPU flags */ |
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59 #define SDL_CPU_ANY 0x00000000 |
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60 #define SDL_CPU_MMX 0x00000001 |
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61 #define SDL_CPU_3DNOW 0x00000002 |
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62 #define SDL_CPU_SSE 0x00000004 |
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63 #define SDL_CPU_SSE2 0x00000008 |
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64 #define SDL_CPU_ALTIVEC_PREFETCH 0x00000010 |
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65 #define SDL_CPU_ALTIVEC_NOPREFETCH 0x00000020 |
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66 |
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67 typedef struct |
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68 { |
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69 Uint8 *src; |
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70 int src_w, src_h; |
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71 int src_pitch; |
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72 int src_skip; |
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73 Uint8 *dst; |
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74 int dst_w, dst_h; |
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75 int dst_pitch; |
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76 int dst_skip; |
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77 SDL_PixelFormat *src_fmt; |
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78 SDL_PixelFormat *dst_fmt; |
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79 Uint8 *table; |
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80 int flags; |
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81 Uint32 colorkey; |
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82 Uint8 r, g, b, a; |
| 0 | 83 } SDL_BlitInfo; |
| 84 | |
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85 typedef void (SDLCALL * SDL_BlitFunc) (SDL_BlitInfo * info); |
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86 |
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87 typedef struct |
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88 { |
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89 Uint32 src_format; |
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90 Uint32 dst_format; |
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91 int flags; |
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92 int cpu; |
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93 SDL_BlitFunc func; |
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94 } SDL_BlitFuncEntry; |
| 0 | 95 |
| 96 /* Blit mapping definition */ | |
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97 typedef struct SDL_BlitMap |
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98 { |
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99 SDL_Surface *dst; |
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100 int identity; |
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101 SDL_blit blit; |
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102 void *data; |
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103 SDL_BlitInfo info; |
| 0 | 104 |
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105 /* the version count matches the destination; mismatch indicates |
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106 an invalid mapping */ |
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107 unsigned int format_version; |
| 0 | 108 } SDL_BlitMap; |
| 109 | |
| 110 /* Functions found in SDL_blit.c */ | |
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111 extern int SDL_CalculateBlit(SDL_Surface * surface); |
| 0 | 112 |
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113 /* Functions found in SDL_blit_*.c */ |
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114 extern SDL_BlitFunc SDL_CalculateBlit0(SDL_Surface * surface); |
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115 extern SDL_BlitFunc SDL_CalculateBlit1(SDL_Surface * surface); |
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116 extern SDL_BlitFunc SDL_CalculateBlitN(SDL_Surface * surface); |
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117 extern SDL_BlitFunc SDL_CalculateBlitA(SDL_Surface * surface); |
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118 |
| 0 | 119 /* |
| 120 * Useful macros for blitting routines | |
| 121 */ | |
| 122 | |
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123 #if defined(__GNUC__) |
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124 #define DECLARE_ALIGNED(t,v,a) t __attribute__((aligned(a))) v |
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125 #elif defined(_MSC_VER) |
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126 #define DECLARE_ALIGNED(t,v,a) __declspec(align(a)) t v |
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127 #else |
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128 #define DECLARE_ALIGNED(t,v,a) t v |
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129 #endif |
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130 |
| 0 | 131 #define FORMAT_EQUAL(A, B) \ |
| 132 ((A)->BitsPerPixel == (B)->BitsPerPixel \ | |
| 133 && ((A)->Rmask == (B)->Rmask) && ((A)->Amask == (B)->Amask)) | |
| 134 | |
| 135 /* Load pixel of the specified format from a buffer and get its R-G-B values */ | |
| 136 /* FIXME: rescale values to 0..255 here? */ | |
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137 #define RGB_FROM_PIXEL(Pixel, fmt, r, g, b) \ |
| 0 | 138 { \ |
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139 r = (((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss); \ |
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140 g = (((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss); \ |
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141 b = (((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss); \ |
| 0 | 142 } |
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143 #define RGB_FROM_RGB565(Pixel, r, g, b) \ |
| 0 | 144 { \ |
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145 r = (((Pixel&0xF800)>>11)<<3); \ |
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146 g = (((Pixel&0x07E0)>>5)<<2); \ |
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147 b = ((Pixel&0x001F)<<3); \ |
| 0 | 148 } |
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149 #define RGB_FROM_RGB555(Pixel, r, g, b) \ |
| 0 | 150 { \ |
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151 r = (((Pixel&0x7C00)>>10)<<3); \ |
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152 g = (((Pixel&0x03E0)>>5)<<3); \ |
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153 b = ((Pixel&0x001F)<<3); \ |
| 0 | 154 } |
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155 #define RGB_FROM_RGB888(Pixel, r, g, b) \ |
| 0 | 156 { \ |
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157 r = ((Pixel&0xFF0000)>>16); \ |
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158 g = ((Pixel&0xFF00)>>8); \ |
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159 b = (Pixel&0xFF); \ |
| 0 | 160 } |
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161 #define RETRIEVE_RGB_PIXEL(buf, bpp, Pixel) \ |
| 0 | 162 do { \ |
| 163 switch (bpp) { \ | |
| 164 case 2: \ | |
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165 Pixel = *((Uint16 *)(buf)); \ |
| 0 | 166 break; \ |
| 167 \ | |
| 168 case 3: { \ | |
| 169 Uint8 *B = (Uint8 *)(buf); \ | |
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170 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
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171 Pixel = B[0] + (B[1] << 8) + (B[2] << 16); \ |
| 0 | 172 } else { \ |
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173 Pixel = (B[0] << 16) + (B[1] << 8) + B[2]; \ |
| 0 | 174 } \ |
| 175 } \ | |
| 176 break; \ | |
| 177 \ | |
| 178 case 4: \ | |
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179 Pixel = *((Uint32 *)(buf)); \ |
| 0 | 180 break; \ |
| 181 \ | |
| 182 default: \ | |
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183 Pixel; /* stop gcc complaints */ \ |
| 0 | 184 break; \ |
| 185 } \ | |
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186 } while (0) |
| 0 | 187 |
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188 #define DISEMBLE_RGB(buf, bpp, fmt, Pixel, r, g, b) \ |
| 0 | 189 do { \ |
| 190 switch (bpp) { \ | |
| 191 case 2: \ | |
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192 Pixel = *((Uint16 *)(buf)); \ |
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193 RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \ |
| 0 | 194 break; \ |
| 195 \ | |
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196 case 3: { \ |
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197 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
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198 r = *((buf)+fmt->Rshift/8); \ |
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199 g = *((buf)+fmt->Gshift/8); \ |
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200 b = *((buf)+fmt->Bshift/8); \ |
| 0 | 201 } else { \ |
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202 r = *((buf)+2-fmt->Rshift/8); \ |
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203 g = *((buf)+2-fmt->Gshift/8); \ |
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204 b = *((buf)+2-fmt->Bshift/8); \ |
| 0 | 205 } \ |
| 206 } \ | |
| 207 break; \ | |
| 208 \ | |
| 209 case 4: \ | |
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210 Pixel = *((Uint32 *)(buf)); \ |
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211 RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \ |
| 0 | 212 break; \ |
| 213 \ | |
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214 default: \ |
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215 Pixel; /* stop gcc complaints */ \ |
| 0 | 216 break; \ |
| 217 } \ | |
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218 } while (0) |
| 0 | 219 |
| 220 /* Assemble R-G-B values into a specified pixel format and store them */ | |
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221 #define PIXEL_FROM_RGB(Pixel, fmt, r, g, b) \ |
| 0 | 222 { \ |
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223 Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \ |
| 0 | 224 ((g>>fmt->Gloss)<<fmt->Gshift)| \ |
| 225 ((b>>fmt->Bloss)<<fmt->Bshift); \ | |
| 226 } | |
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227 #define RGB565_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 228 { \ |
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229 Pixel = ((r>>3)<<11)|((g>>2)<<5)|(b>>3); \ |
| 0 | 230 } |
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231 #define RGB555_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 232 { \ |
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233 Pixel = ((r>>3)<<10)|((g>>3)<<5)|(b>>3); \ |
| 0 | 234 } |
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235 #define RGB888_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 236 { \ |
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237 Pixel = (r<<16)|(g<<8)|b; \ |
| 0 | 238 } |
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239 #define ARGB8888_FROM_RGBA(Pixel, r, g, b, a) \ |
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240 { \ |
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241 Pixel = (a<<24)|(r<<16)|(g<<8)|b; \ |
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242 } |
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243 #define RGBA8888_FROM_RGBA(Pixel, r, g, b, a) \ |
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244 { \ |
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245 Pixel = (r<<24)|(g<<16)|(b<<8)|a; \ |
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246 } |
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247 #define ABGR8888_FROM_RGBA(Pixel, r, g, b, a) \ |
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248 { \ |
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249 Pixel = (a<<24)|(b<<16)|(g<<8)|r; \ |
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250 } |
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251 #define BGRA8888_FROM_RGBA(Pixel, r, g, b, a) \ |
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252 { \ |
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253 Pixel = (b<<24)|(g<<16)|(r<<8)|a; \ |
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254 } |
| 0 | 255 #define ASSEMBLE_RGB(buf, bpp, fmt, r, g, b) \ |
| 256 { \ | |
| 257 switch (bpp) { \ | |
| 258 case 2: { \ | |
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259 Uint16 Pixel; \ |
| 0 | 260 \ |
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261 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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262 *((Uint16 *)(buf)) = Pixel; \ |
| 0 | 263 } \ |
| 264 break; \ | |
| 265 \ | |
| 266 case 3: { \ | |
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267 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
| 0 | 268 *((buf)+fmt->Rshift/8) = r; \ |
| 269 *((buf)+fmt->Gshift/8) = g; \ | |
| 270 *((buf)+fmt->Bshift/8) = b; \ | |
| 271 } else { \ | |
| 272 *((buf)+2-fmt->Rshift/8) = r; \ | |
| 273 *((buf)+2-fmt->Gshift/8) = g; \ | |
| 274 *((buf)+2-fmt->Bshift/8) = b; \ | |
| 275 } \ | |
| 276 } \ | |
| 277 break; \ | |
| 278 \ | |
| 279 case 4: { \ | |
|
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280 Uint32 Pixel; \ |
| 0 | 281 \ |
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282 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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283 *((Uint32 *)(buf)) = Pixel; \ |
| 0 | 284 } \ |
| 285 break; \ | |
| 286 } \ | |
| 287 } | |
| 288 #define ASSEMBLE_RGB_AMASK(buf, bpp, fmt, r, g, b, Amask) \ | |
| 289 { \ | |
| 290 switch (bpp) { \ | |
| 291 case 2: { \ | |
| 292 Uint16 *bufp; \ | |
|
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293 Uint16 Pixel; \ |
| 0 | 294 \ |
| 295 bufp = (Uint16 *)buf; \ | |
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296 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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297 *bufp = Pixel | (*bufp & Amask); \ |
| 0 | 298 } \ |
| 299 break; \ | |
| 300 \ | |
| 301 case 3: { \ | |
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302 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
| 0 | 303 *((buf)+fmt->Rshift/8) = r; \ |
| 304 *((buf)+fmt->Gshift/8) = g; \ | |
| 305 *((buf)+fmt->Bshift/8) = b; \ | |
| 306 } else { \ | |
| 307 *((buf)+2-fmt->Rshift/8) = r; \ | |
| 308 *((buf)+2-fmt->Gshift/8) = g; \ | |
| 309 *((buf)+2-fmt->Bshift/8) = b; \ | |
| 310 } \ | |
| 311 } \ | |
| 312 break; \ | |
| 313 \ | |
| 314 case 4: { \ | |
| 315 Uint32 *bufp; \ | |
|
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316 Uint32 Pixel; \ |
| 0 | 317 \ |
| 318 bufp = (Uint32 *)buf; \ | |
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319 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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320 *bufp = Pixel | (*bufp & Amask); \ |
| 0 | 321 } \ |
| 322 break; \ | |
| 323 } \ | |
| 324 } | |
| 325 | |
| 326 /* FIXME: Should we rescale alpha into 0..255 here? */ | |
|
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327 #define RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a) \ |
| 0 | 328 { \ |
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329 r = ((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss; \ |
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330 g = ((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss; \ |
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331 b = ((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss; \ |
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332 a = ((Pixel&fmt->Amask)>>fmt->Ashift)<<fmt->Aloss; \ |
| 0 | 333 } |
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334 #define RGBA_FROM_8888(Pixel, fmt, r, g, b, a) \ |
| 0 | 335 { \ |
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336 r = (Pixel&fmt->Rmask)>>fmt->Rshift; \ |
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337 g = (Pixel&fmt->Gmask)>>fmt->Gshift; \ |
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338 b = (Pixel&fmt->Bmask)>>fmt->Bshift; \ |
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339 a = (Pixel&fmt->Amask)>>fmt->Ashift; \ |
| 0 | 340 } |
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341 #define RGBA_FROM_RGBA8888(Pixel, r, g, b, a) \ |
| 0 | 342 { \ |
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343 r = (Pixel>>24); \ |
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344 g = ((Pixel>>16)&0xFF); \ |
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345 b = ((Pixel>>8)&0xFF); \ |
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346 a = (Pixel&0xFF); \ |
| 0 | 347 } |
|
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348 #define RGBA_FROM_ARGB8888(Pixel, r, g, b, a) \ |
| 0 | 349 { \ |
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350 r = ((Pixel>>16)&0xFF); \ |
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351 g = ((Pixel>>8)&0xFF); \ |
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352 b = (Pixel&0xFF); \ |
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353 a = (Pixel>>24); \ |
| 0 | 354 } |
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355 #define RGBA_FROM_ABGR8888(Pixel, r, g, b, a) \ |
| 0 | 356 { \ |
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357 r = (Pixel&0xFF); \ |
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358 g = ((Pixel>>8)&0xFF); \ |
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359 b = ((Pixel>>16)&0xFF); \ |
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360 a = (Pixel>>24); \ |
| 0 | 361 } |
|
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362 #define RGBA_FROM_BGRA8888(Pixel, r, g, b, a) \ |
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363 { \ |
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364 r = ((Pixel>>8)&0xFF); \ |
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365 g = ((Pixel>>16)&0xFF); \ |
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366 b = (Pixel>>24); \ |
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367 a = (Pixel&0xFF); \ |
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368 } |
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369 #define DISEMBLE_RGBA(buf, bpp, fmt, Pixel, r, g, b, a) \ |
| 0 | 370 do { \ |
| 371 switch (bpp) { \ | |
| 372 case 2: \ | |
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373 Pixel = *((Uint16 *)(buf)); \ |
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374 RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a); \ |
| 0 | 375 break; \ |
| 376 \ | |
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377 case 3: { \ |
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378 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
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379 r = *((buf)+fmt->Rshift/8); \ |
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380 g = *((buf)+fmt->Gshift/8); \ |
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381 b = *((buf)+fmt->Bshift/8); \ |
| 0 | 382 } else { \ |
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383 r = *((buf)+2-fmt->Rshift/8); \ |
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384 g = *((buf)+2-fmt->Gshift/8); \ |
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385 b = *((buf)+2-fmt->Bshift/8); \ |
| 0 | 386 } \ |
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387 a = 0xFF; \ |
| 0 | 388 } \ |
| 389 break; \ | |
| 390 \ | |
| 391 case 4: \ | |
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392 Pixel = *((Uint32 *)(buf)); \ |
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393 RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a); \ |
| 0 | 394 break; \ |
| 395 \ | |
| 396 default: \ | |
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397 Pixel; /* stop gcc complaints */ \ |
| 0 | 398 break; \ |
| 399 } \ | |
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400 } while (0) |
| 0 | 401 |
| 402 /* FIXME: this isn't correct, especially for Alpha (maximum != 255) */ | |
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403 #define PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a) \ |
| 0 | 404 { \ |
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405 Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \ |
| 0 | 406 ((g>>fmt->Gloss)<<fmt->Gshift)| \ |
| 407 ((b>>fmt->Bloss)<<fmt->Bshift)| \ | |
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408 ((a>>fmt->Aloss)<<fmt->Ashift); \ |
| 0 | 409 } |
| 410 #define ASSEMBLE_RGBA(buf, bpp, fmt, r, g, b, a) \ | |
| 411 { \ | |
| 412 switch (bpp) { \ | |
| 413 case 2: { \ | |
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414 Uint16 Pixel; \ |
| 0 | 415 \ |
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416 PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a); \ |
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417 *((Uint16 *)(buf)) = Pixel; \ |
| 0 | 418 } \ |
| 419 break; \ | |
| 420 \ | |
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421 case 3: { \ |
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422 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
| 0 | 423 *((buf)+fmt->Rshift/8) = r; \ |
| 424 *((buf)+fmt->Gshift/8) = g; \ | |
| 425 *((buf)+fmt->Bshift/8) = b; \ | |
| 426 } else { \ | |
| 427 *((buf)+2-fmt->Rshift/8) = r; \ | |
| 428 *((buf)+2-fmt->Gshift/8) = g; \ | |
| 429 *((buf)+2-fmt->Bshift/8) = b; \ | |
| 430 } \ | |
| 431 } \ | |
| 432 break; \ | |
| 433 \ | |
| 434 case 4: { \ | |
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435 Uint32 Pixel; \ |
| 0 | 436 \ |
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437 PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a); \ |
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438 *((Uint32 *)(buf)) = Pixel; \ |
| 0 | 439 } \ |
| 440 break; \ | |
| 441 } \ | |
| 442 } | |
| 443 | |
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444 /* Blend the RGB values of two Pixels based on a source alpha value */ |
| 0 | 445 #define ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB) \ |
| 446 do { \ | |
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447 dR = ((((int)(sR-dR)*(int)A)/255)+dR); \ |
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448 dG = ((((int)(sG-dG)*(int)A)/255)+dG); \ |
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449 dB = ((((int)(sB-dB)*(int)A)/255)+dB); \ |
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450 } while(0) |
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451 |
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452 |
| 0 | 453 /* This is a very useful loop for optimizing blitters */ |
|
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454 #if defined(_MSC_VER) && (_MSC_VER == 1300) |
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455 /* There's a bug in the Visual C++ 7 optimizer when compiling this code */ |
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456 #else |
| 0 | 457 #define USE_DUFFS_LOOP |
|
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458 #endif |
| 0 | 459 #ifdef USE_DUFFS_LOOP |
| 460 | |
| 461 /* 8-times unrolled loop */ | |
| 462 #define DUFFS_LOOP8(pixel_copy_increment, width) \ | |
| 463 { int n = (width+7)/8; \ | |
|
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464 switch (width & 7) { \ |
| 0 | 465 case 0: do { pixel_copy_increment; \ |
| 466 case 7: pixel_copy_increment; \ | |
| 467 case 6: pixel_copy_increment; \ | |
| 468 case 5: pixel_copy_increment; \ | |
| 469 case 4: pixel_copy_increment; \ | |
| 470 case 3: pixel_copy_increment; \ | |
| 471 case 2: pixel_copy_increment; \ | |
| 472 case 1: pixel_copy_increment; \ | |
| 473 } while ( --n > 0 ); \ | |
| 474 } \ | |
| 475 } | |
| 476 | |
| 477 /* 4-times unrolled loop */ | |
| 478 #define DUFFS_LOOP4(pixel_copy_increment, width) \ | |
| 479 { int n = (width+3)/4; \ | |
|
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480 switch (width & 3) { \ |
| 0 | 481 case 0: do { pixel_copy_increment; \ |
| 482 case 3: pixel_copy_increment; \ | |
| 483 case 2: pixel_copy_increment; \ | |
| 484 case 1: pixel_copy_increment; \ | |
|
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485 } while (--n > 0); \ |
|
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486 } \ |
|
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487 } |
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488 |
| 0 | 489 /* Use the 8-times version of the loop by default */ |
| 490 #define DUFFS_LOOP(pixel_copy_increment, width) \ | |
| 491 DUFFS_LOOP8(pixel_copy_increment, width) | |
| 492 | |
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493 /* Special version of Duff's device for even more optimization */ |
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494 #define DUFFS_LOOP_124(pixel_copy_increment1, \ |
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495 pixel_copy_increment2, \ |
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496 pixel_copy_increment4, width) \ |
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497 { int n = width; \ |
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498 if (n & 1) { \ |
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499 pixel_copy_increment1; n -= 1; \ |
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500 } \ |
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501 if (n & 2) { \ |
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502 pixel_copy_increment2; n -= 2; \ |
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503 } \ |
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504 if (n) { \ |
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505 n = (n+7)/ 8; \ |
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506 switch (n & 4) { \ |
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507 case 0: do { pixel_copy_increment4; \ |
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508 case 4: pixel_copy_increment4; \ |
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509 } while (--n > 0); \ |
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510 } \ |
|
ff602fdfdedc
Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents:
2899
diff
changeset
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511 } \ |
|
689
5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
diff
changeset
|
512 } |
|
5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
diff
changeset
|
513 |
|
3035
ff602fdfdedc
Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents:
2899
diff
changeset
|
514 #else |
|
689
5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
diff
changeset
|
515 |
|
5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
553
diff
changeset
|
516 /* Don't use Duff's device to unroll loops */ |
| 0 | 517 #define DUFFS_LOOP(pixel_copy_increment, width) \ |
| 518 { int n; \ | |
| 519 for ( n=width; n > 0; --n ) { \ | |
| 520 pixel_copy_increment; \ | |
| 521 } \ | |
| 522 } | |
| 523 #define DUFFS_LOOP8(pixel_copy_increment, width) \ | |
| 524 DUFFS_LOOP(pixel_copy_increment, width) | |
| 525 #define DUFFS_LOOP4(pixel_copy_increment, width) \ | |
| 526 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
|
527 #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
|
528 pixel_copy_increment2, \ |
|
ff602fdfdedc
Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents:
2899
diff
changeset
|
529 pixel_copy_increment4, width) \ |
|
ff602fdfdedc
Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents:
2899
diff
changeset
|
530 DUFFS_LOOP(pixel_copy_increment1, width) |
| 0 | 531 |
| 532 #endif /* USE_DUFFS_LOOP */ | |
| 533 | |
| 534 /* Prevent Visual C++ 6.0 from printing out stupid warnings */ | |
| 535 #if defined(_MSC_VER) && (_MSC_VER >= 600) | |
| 536 #pragma warning(disable: 4550) | |
| 537 #endif | |
| 538 | |
| 539 #endif /* _SDL_blit_h */ | |
|
2898
e40448bc7727
Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
540 |
|
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
|
541 /* vi: set ts=4 sw=4 expandtab: */ |