Mercurial > sdl-ios-xcode
annotate src/video/SDL_blit.h @ 2824:4dba7aa7ea77
Added slow but complete blit fallback
Don't try to RLE encode surfaces that have alpha channel and alpha modulation
Don't turn on blending when converting an RGB surface to RGBA format
Do turn on blending when converting colorkey to alpha channel
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 02 Dec 2008 17:14:04 +0000 |
| parents | c785543d1843 |
| children | 6258fa7cd300 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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3 Copyright (C) 1997-2006 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
|
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6 modify it under the terms of the GNU Lesser General Public |
| 0 | 7 License as published by the Free Software Foundation; either |
|
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8 version 2.1 of the License, or (at your option) any later version. |
| 0 | 9 |
| 10 This library is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
|
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13 Lesser General Public License for more details. |
| 0 | 14 |
|
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
| 19 Sam Lantinga | |
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20 slouken@libsdl.org |
| 0 | 21 */ |
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22 #include "SDL_config.h" |
| 0 | 23 |
| 24 #ifndef _SDL_blit_h | |
| 25 #define _SDL_blit_h | |
| 26 | |
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27 #ifdef __MMX__ |
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28 #include <mmintrin.h> |
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29 #endif |
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30 #ifdef __3dNOW__ |
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31 #include <mm3dnow.h> |
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32 #endif |
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33 #ifdef __SSE__ |
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34 #include <xmmintrin.h> |
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35 #endif |
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36 #ifdef __SSE2__ |
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37 #include <emmintrin.h> |
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38 #endif |
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39 |
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40 #include "SDL_cpuinfo.h" |
| 0 | 41 #include "SDL_endian.h" |
| 42 | |
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43 /* SDL blit copy flags */ |
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44 #define SDL_COPY_MODULATE_COLOR 0x00000001 |
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45 #define SDL_COPY_MODULATE_ALPHA 0x00000002 |
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46 #define SDL_COPY_MASK 0x00000010 |
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47 #define SDL_COPY_BLEND 0x00000020 |
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48 #define SDL_COPY_ADD 0x00000040 |
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49 #define SDL_COPY_MOD 0x00000080 |
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50 #define SDL_COPY_COLORKEY 0x00000100 |
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51 #define SDL_COPY_NEAREST 0x00000200 |
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52 #define SDL_COPY_RLE_DESIRED 0x00001000 |
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53 #define SDL_COPY_RLE_COLORKEY 0x00002000 |
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54 #define SDL_COPY_RLE_ALPHAKEY 0x00004000 |
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55 |
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56 /* SDL blit CPU flags */ |
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57 #define SDL_CPU_ANY 0x00000000 |
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58 #define SDL_CPU_MMX 0x00000001 |
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59 #define SDL_CPU_3DNOW 0x00000002 |
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60 #define SDL_CPU_SSE 0x00000004 |
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61 #define SDL_CPU_SSE2 0x00000008 |
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62 #define SDL_CPU_ALTIVEC_PREFETCH 0x00000010 |
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63 #define SDL_CPU_ALTIVEC_NOPREFETCH 0x00000020 |
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64 |
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65 typedef struct |
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66 { |
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67 Uint8 *src; |
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68 int src_w, src_h; |
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69 int src_pitch; |
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70 int src_skip; |
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71 Uint8 *dst; |
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72 int dst_w, dst_h; |
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73 int dst_pitch; |
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74 int dst_skip; |
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75 SDL_PixelFormat *src_fmt; |
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76 SDL_PixelFormat *dst_fmt; |
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77 Uint8 *table; |
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78 int flags; |
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79 Uint32 colorkey; |
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80 Uint8 r, g, b, a; |
| 0 | 81 } SDL_BlitInfo; |
| 82 | |
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83 typedef void (SDLCALL * SDL_BlitFunc) (SDL_BlitInfo * info); |
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84 |
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85 typedef struct |
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86 { |
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87 Uint32 src_format; |
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88 Uint32 dst_format; |
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89 int flags; |
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90 int cpu; |
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91 SDL_BlitFunc func; |
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92 } SDL_BlitFuncEntry; |
| 0 | 93 |
| 94 /* Blit mapping definition */ | |
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95 typedef struct SDL_BlitMap |
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96 { |
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97 SDL_Surface *dst; |
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98 int identity; |
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99 SDL_blit blit; |
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100 void *data; |
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101 SDL_BlitInfo info; |
| 0 | 102 |
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103 /* the version count matches the destination; mismatch indicates |
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104 an invalid mapping */ |
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105 unsigned int format_version; |
| 0 | 106 } SDL_BlitMap; |
| 107 | |
| 108 /* Functions found in SDL_blit.c */ | |
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109 extern int SDL_CalculateBlit(SDL_Surface * surface); |
| 0 | 110 |
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111 /* Functions found in SDL_blit_*.c */ |
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112 extern SDL_BlitFunc SDL_CalculateBlit0(SDL_Surface * surface); |
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113 extern SDL_BlitFunc SDL_CalculateBlit1(SDL_Surface * surface); |
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114 extern SDL_BlitFunc SDL_CalculateBlitN(SDL_Surface * surface); |
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115 extern SDL_BlitFunc SDL_CalculateBlitA(SDL_Surface * surface); |
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116 |
| 0 | 117 /* |
| 118 * Useful macros for blitting routines | |
| 119 */ | |
| 120 | |
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121 #if defined(__GNUC__) |
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122 #define DECLARE_ALIGNED(t,v,a) t __attribute__((aligned(a))) v |
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123 #elif defined(_MSC_VER) |
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124 #define DECLARE_ALIGNED(t,v,a) __declspec(align(a)) t v |
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125 #else |
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126 #define DECLARE_ALIGNED(t,v,a) t v |
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127 #endif |
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128 |
| 0 | 129 #define FORMAT_EQUAL(A, B) \ |
| 130 ((A)->BitsPerPixel == (B)->BitsPerPixel \ | |
| 131 && ((A)->Rmask == (B)->Rmask) && ((A)->Amask == (B)->Amask)) | |
| 132 | |
| 133 /* Load pixel of the specified format from a buffer and get its R-G-B values */ | |
| 134 /* FIXME: rescale values to 0..255 here? */ | |
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135 #define RGB_FROM_PIXEL(Pixel, fmt, r, g, b) \ |
| 0 | 136 { \ |
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137 r = (((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss); \ |
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138 g = (((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss); \ |
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139 b = (((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss); \ |
| 0 | 140 } |
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141 #define RGB_FROM_RGB565(Pixel, r, g, b) \ |
| 0 | 142 { \ |
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143 r = (((Pixel&0xF800)>>11)<<3); \ |
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144 g = (((Pixel&0x07E0)>>5)<<2); \ |
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145 b = ((Pixel&0x001F)<<3); \ |
| 0 | 146 } |
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147 #define RGB_FROM_RGB555(Pixel, r, g, b) \ |
| 0 | 148 { \ |
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149 r = (((Pixel&0x7C00)>>10)<<3); \ |
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150 g = (((Pixel&0x03E0)>>5)<<3); \ |
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151 b = ((Pixel&0x001F)<<3); \ |
| 0 | 152 } |
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153 #define RGB_FROM_RGB888(Pixel, r, g, b) \ |
| 0 | 154 { \ |
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155 r = ((Pixel&0xFF0000)>>16); \ |
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156 g = ((Pixel&0xFF00)>>8); \ |
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157 b = (Pixel&0xFF); \ |
| 0 | 158 } |
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159 #define RETRIEVE_RGB_PIXEL(buf, bpp, Pixel) \ |
| 0 | 160 do { \ |
| 161 switch (bpp) { \ | |
| 162 case 2: \ | |
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163 Pixel = *((Uint16 *)(buf)); \ |
| 0 | 164 break; \ |
| 165 \ | |
| 166 case 3: { \ | |
| 167 Uint8 *B = (Uint8 *)(buf); \ | |
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168 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
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169 Pixel = B[0] + (B[1] << 8) + (B[2] << 16); \ |
| 0 | 170 } else { \ |
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171 Pixel = (B[0] << 16) + (B[1] << 8) + B[2]; \ |
| 0 | 172 } \ |
| 173 } \ | |
| 174 break; \ | |
| 175 \ | |
| 176 case 4: \ | |
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177 Pixel = *((Uint32 *)(buf)); \ |
| 0 | 178 break; \ |
| 179 \ | |
| 180 default: \ | |
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181 Pixel; /* stop gcc complaints */ \ |
| 0 | 182 break; \ |
| 183 } \ | |
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184 } while (0) |
| 0 | 185 |
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186 #define DISEMBLE_RGB(buf, bpp, fmt, Pixel, r, g, b) \ |
| 0 | 187 do { \ |
| 188 switch (bpp) { \ | |
| 189 case 2: \ | |
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190 Pixel = *((Uint16 *)(buf)); \ |
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191 RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \ |
| 0 | 192 break; \ |
| 193 \ | |
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194 case 3: { \ |
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195 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
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196 r = *((buf)+fmt->Rshift/8); \ |
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197 g = *((buf)+fmt->Gshift/8); \ |
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198 b = *((buf)+fmt->Bshift/8); \ |
| 0 | 199 } else { \ |
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200 r = *((buf)+2-fmt->Rshift/8); \ |
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201 g = *((buf)+2-fmt->Gshift/8); \ |
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202 b = *((buf)+2-fmt->Bshift/8); \ |
| 0 | 203 } \ |
| 204 } \ | |
| 205 break; \ | |
| 206 \ | |
| 207 case 4: \ | |
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208 Pixel = *((Uint32 *)(buf)); \ |
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209 RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \ |
| 0 | 210 break; \ |
| 211 \ | |
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212 default: \ |
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213 Pixel; /* stop gcc complaints */ \ |
| 0 | 214 break; \ |
| 215 } \ | |
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216 } while (0) |
| 0 | 217 |
| 218 /* Assemble R-G-B values into a specified pixel format and store them */ | |
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219 #define PIXEL_FROM_RGB(Pixel, fmt, r, g, b) \ |
| 0 | 220 { \ |
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221 Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \ |
| 0 | 222 ((g>>fmt->Gloss)<<fmt->Gshift)| \ |
| 223 ((b>>fmt->Bloss)<<fmt->Bshift); \ | |
| 224 } | |
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225 #define RGB565_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 226 { \ |
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227 Pixel = ((r>>3)<<11)|((g>>2)<<5)|(b>>3); \ |
| 0 | 228 } |
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229 #define RGB555_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 230 { \ |
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231 Pixel = ((r>>3)<<10)|((g>>3)<<5)|(b>>3); \ |
| 0 | 232 } |
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233 #define RGB888_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 234 { \ |
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235 Pixel = (r<<16)|(g<<8)|b; \ |
| 0 | 236 } |
| 237 #define ASSEMBLE_RGB(buf, bpp, fmt, r, g, b) \ | |
| 238 { \ | |
| 239 switch (bpp) { \ | |
| 240 case 2: { \ | |
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241 Uint16 Pixel; \ |
| 0 | 242 \ |
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243 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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244 *((Uint16 *)(buf)) = Pixel; \ |
| 0 | 245 } \ |
| 246 break; \ | |
| 247 \ | |
| 248 case 3: { \ | |
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249 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
| 0 | 250 *((buf)+fmt->Rshift/8) = r; \ |
| 251 *((buf)+fmt->Gshift/8) = g; \ | |
| 252 *((buf)+fmt->Bshift/8) = b; \ | |
| 253 } else { \ | |
| 254 *((buf)+2-fmt->Rshift/8) = r; \ | |
| 255 *((buf)+2-fmt->Gshift/8) = g; \ | |
| 256 *((buf)+2-fmt->Bshift/8) = b; \ | |
| 257 } \ | |
| 258 } \ | |
| 259 break; \ | |
| 260 \ | |
| 261 case 4: { \ | |
|
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262 Uint32 Pixel; \ |
| 0 | 263 \ |
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264 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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265 *((Uint32 *)(buf)) = Pixel; \ |
| 0 | 266 } \ |
| 267 break; \ | |
| 268 } \ | |
| 269 } | |
| 270 #define ASSEMBLE_RGB_AMASK(buf, bpp, fmt, r, g, b, Amask) \ | |
| 271 { \ | |
| 272 switch (bpp) { \ | |
| 273 case 2: { \ | |
| 274 Uint16 *bufp; \ | |
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275 Uint16 Pixel; \ |
| 0 | 276 \ |
| 277 bufp = (Uint16 *)buf; \ | |
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278 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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279 *bufp = Pixel | (*bufp & Amask); \ |
| 0 | 280 } \ |
| 281 break; \ | |
| 282 \ | |
| 283 case 3: { \ | |
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284 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
| 0 | 285 *((buf)+fmt->Rshift/8) = r; \ |
| 286 *((buf)+fmt->Gshift/8) = g; \ | |
| 287 *((buf)+fmt->Bshift/8) = b; \ | |
| 288 } else { \ | |
| 289 *((buf)+2-fmt->Rshift/8) = r; \ | |
| 290 *((buf)+2-fmt->Gshift/8) = g; \ | |
| 291 *((buf)+2-fmt->Bshift/8) = b; \ | |
| 292 } \ | |
| 293 } \ | |
| 294 break; \ | |
| 295 \ | |
| 296 case 4: { \ | |
| 297 Uint32 *bufp; \ | |
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298 Uint32 Pixel; \ |
| 0 | 299 \ |
| 300 bufp = (Uint32 *)buf; \ | |
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301 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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302 *bufp = Pixel | (*bufp & Amask); \ |
| 0 | 303 } \ |
| 304 break; \ | |
| 305 } \ | |
| 306 } | |
| 307 | |
| 308 /* FIXME: Should we rescale alpha into 0..255 here? */ | |
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309 #define RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a) \ |
| 0 | 310 { \ |
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311 r = ((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss; \ |
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312 g = ((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss; \ |
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313 b = ((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss; \ |
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314 a = ((Pixel&fmt->Amask)>>fmt->Ashift)<<fmt->Aloss; \ |
| 0 | 315 } |
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316 #define RGBA_FROM_8888(Pixel, fmt, r, g, b, a) \ |
| 0 | 317 { \ |
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318 r = (Pixel&fmt->Rmask)>>fmt->Rshift; \ |
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319 g = (Pixel&fmt->Gmask)>>fmt->Gshift; \ |
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320 b = (Pixel&fmt->Bmask)>>fmt->Bshift; \ |
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321 a = (Pixel&fmt->Amask)>>fmt->Ashift; \ |
| 0 | 322 } |
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323 #define RGBA_FROM_RGBA8888(Pixel, r, g, b, a) \ |
| 0 | 324 { \ |
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325 r = (Pixel>>24); \ |
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326 g = ((Pixel>>16)&0xFF); \ |
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327 b = ((Pixel>>8)&0xFF); \ |
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328 a = (Pixel&0xFF); \ |
| 0 | 329 } |
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330 #define RGBA_FROM_ARGB8888(Pixel, r, g, b, a) \ |
| 0 | 331 { \ |
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332 r = ((Pixel>>16)&0xFF); \ |
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333 g = ((Pixel>>8)&0xFF); \ |
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334 b = (Pixel&0xFF); \ |
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335 a = (Pixel>>24); \ |
| 0 | 336 } |
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337 #define RGBA_FROM_ABGR8888(Pixel, r, g, b, a) \ |
| 0 | 338 { \ |
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339 r = (Pixel&0xFF); \ |
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340 g = ((Pixel>>8)&0xFF); \ |
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341 b = ((Pixel>>16)&0xFF); \ |
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342 a = (Pixel>>24); \ |
| 0 | 343 } |
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344 #define DISEMBLE_RGBA(buf, bpp, fmt, Pixel, r, g, b, a) \ |
| 0 | 345 do { \ |
| 346 switch (bpp) { \ | |
| 347 case 2: \ | |
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348 Pixel = *((Uint16 *)(buf)); \ |
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349 RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a); \ |
| 0 | 350 break; \ |
| 351 \ | |
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352 case 3: { \ |
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353 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
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354 r = *((buf)+fmt->Rshift/8); \ |
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355 g = *((buf)+fmt->Gshift/8); \ |
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356 b = *((buf)+fmt->Bshift/8); \ |
| 0 | 357 } else { \ |
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358 r = *((buf)+2-fmt->Rshift/8); \ |
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359 g = *((buf)+2-fmt->Gshift/8); \ |
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360 b = *((buf)+2-fmt->Bshift/8); \ |
| 0 | 361 } \ |
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362 a = 0xFF; \ |
| 0 | 363 } \ |
| 364 break; \ | |
| 365 \ | |
| 366 case 4: \ | |
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367 Pixel = *((Uint32 *)(buf)); \ |
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368 RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a); \ |
| 0 | 369 break; \ |
| 370 \ | |
| 371 default: \ | |
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372 Pixel; /* stop gcc complaints */ \ |
| 0 | 373 break; \ |
| 374 } \ | |
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375 } while (0) |
| 0 | 376 |
| 377 /* FIXME: this isn't correct, especially for Alpha (maximum != 255) */ | |
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378 #define PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a) \ |
| 0 | 379 { \ |
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380 Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \ |
| 0 | 381 ((g>>fmt->Gloss)<<fmt->Gshift)| \ |
| 382 ((b>>fmt->Bloss)<<fmt->Bshift)| \ | |
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383 ((a>>fmt->Aloss)<<fmt->Ashift); \ |
| 0 | 384 } |
| 385 #define ASSEMBLE_RGBA(buf, bpp, fmt, r, g, b, a) \ | |
| 386 { \ | |
| 387 switch (bpp) { \ | |
| 388 case 2: { \ | |
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389 Uint16 Pixel; \ |
| 0 | 390 \ |
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391 PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a); \ |
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392 *((Uint16 *)(buf)) = Pixel; \ |
| 0 | 393 } \ |
| 394 break; \ | |
| 395 \ | |
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396 case 3: { \ |
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397 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
| 0 | 398 *((buf)+fmt->Rshift/8) = r; \ |
| 399 *((buf)+fmt->Gshift/8) = g; \ | |
| 400 *((buf)+fmt->Bshift/8) = b; \ | |
| 401 } else { \ | |
| 402 *((buf)+2-fmt->Rshift/8) = r; \ | |
| 403 *((buf)+2-fmt->Gshift/8) = g; \ | |
| 404 *((buf)+2-fmt->Bshift/8) = b; \ | |
| 405 } \ | |
| 406 } \ | |
| 407 break; \ | |
| 408 \ | |
| 409 case 4: { \ | |
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410 Uint32 Pixel; \ |
| 0 | 411 \ |
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412 PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a); \ |
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413 *((Uint32 *)(buf)) = Pixel; \ |
| 0 | 414 } \ |
| 415 break; \ | |
| 416 } \ | |
| 417 } | |
| 418 | |
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419 /* Blend the RGB values of two Pixels based on a source alpha value */ |
| 0 | 420 #define ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB) \ |
| 421 do { \ | |
| 422 dR = (((sR-dR)*(A))>>8)+dR; \ | |
| 423 dG = (((sG-dG)*(A))>>8)+dG; \ | |
| 424 dB = (((sB-dB)*(A))>>8)+dB; \ | |
| 425 } while(0) | |
| 426 | |
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427 /* Blend the RGB values of two Pixels based on a source alpha value */ |
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428 #define ACCURATE_ALPHA_BLEND(sR, sG, sB, sA, dR, dG, dB) \ |
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429 do { \ |
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430 unsigned tR, tG, tB, tA; \ |
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431 tA = 255 - sA; \ |
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432 tR = 1 + (sR * sA) + (dR * tA); \ |
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433 dR = (tR + (tR >> 8)) >> 8; \ |
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434 tG = 1 + (sG * sA) + (dG * tA); \ |
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435 dG = (tG + (tG >> 8)) >> 8; \ |
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436 tB = 1 + (sB * sA) + (dB * tA); \ |
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437 dB = (tB + (tB >> 8)) >> 8; \ |
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438 } while(0) |
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439 |
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440 |
| 0 | 441 /* This is a very useful loop for optimizing blitters */ |
|
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442 #if defined(_MSC_VER) && (_MSC_VER == 1300) |
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443 /* There's a bug in the Visual C++ 7 optimizer when compiling this code */ |
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444 #else |
| 0 | 445 #define USE_DUFFS_LOOP |
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446 #endif |
| 0 | 447 #ifdef USE_DUFFS_LOOP |
| 448 | |
| 449 /* 8-times unrolled loop */ | |
| 450 #define DUFFS_LOOP8(pixel_copy_increment, width) \ | |
| 451 { int n = (width+7)/8; \ | |
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452 switch (width & 7) { \ |
| 0 | 453 case 0: do { pixel_copy_increment; \ |
| 454 case 7: pixel_copy_increment; \ | |
| 455 case 6: pixel_copy_increment; \ | |
| 456 case 5: pixel_copy_increment; \ | |
| 457 case 4: pixel_copy_increment; \ | |
| 458 case 3: pixel_copy_increment; \ | |
| 459 case 2: pixel_copy_increment; \ | |
| 460 case 1: pixel_copy_increment; \ | |
| 461 } while ( --n > 0 ); \ | |
| 462 } \ | |
| 463 } | |
| 464 | |
| 465 /* 4-times unrolled loop */ | |
| 466 #define DUFFS_LOOP4(pixel_copy_increment, width) \ | |
| 467 { int n = (width+3)/4; \ | |
|
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468 switch (width & 3) { \ |
| 0 | 469 case 0: do { 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 | |
|
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477 /* 2 - times unrolled loop */ |
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478 #define DUFFS_LOOP_DOUBLE2(pixel_copy_increment, \ |
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479 double_pixel_copy_increment, width) \ |
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480 { int n, w = width; \ |
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481 if( w & 1 ) { \ |
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482 pixel_copy_increment; \ |
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483 w--; \ |
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484 } \ |
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485 if ( w > 0 ) { \ |
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486 n = ( w + 2) / 4; \ |
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487 switch( w & 2 ) { \ |
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488 case 0: do { double_pixel_copy_increment; \ |
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489 case 2: double_pixel_copy_increment; \ |
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490 } while ( --n > 0 ); \ |
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491 } \ |
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492 } \ |
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493 } |
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494 |
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495 /* 2 - times unrolled loop 4 pixels */ |
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496 #define DUFFS_LOOP_QUATRO2(pixel_copy_increment, \ |
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497 double_pixel_copy_increment, \ |
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498 quatro_pixel_copy_increment, width) \ |
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499 { int n, w = width; \ |
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500 if(w & 1) { \ |
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501 pixel_copy_increment; \ |
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502 w--; \ |
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503 } \ |
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504 if(w & 2) { \ |
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505 double_pixel_copy_increment; \ |
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506 w -= 2; \ |
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507 } \ |
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508 if ( w > 0 ) { \ |
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509 n = ( w + 7 ) / 8; \ |
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510 switch( w & 4 ) { \ |
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511 case 0: do { quatro_pixel_copy_increment; \ |
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512 case 4: quatro_pixel_copy_increment; \ |
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513 } while ( --n > 0 ); \ |
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514 } \ |
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515 } \ |
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516 } |
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517 |
| 0 | 518 /* Use the 8-times version of the loop by default */ |
| 519 #define DUFFS_LOOP(pixel_copy_increment, width) \ | |
| 520 DUFFS_LOOP8(pixel_copy_increment, width) | |
| 521 | |
| 522 #else | |
| 523 | |
| 524 /* Don't use Duff's device to unroll loops */ | |
|
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Date: Tue, 19 Aug 2003 17:57:00 +0200
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525 #define DUFFS_LOOP_DOUBLE2(pixel_copy_increment, \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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526 double_pixel_copy_increment, width) \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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527 { int n = width; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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528 if( n & 1 ) { \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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529 pixel_copy_increment; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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530 n--; \ |
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5bb080d35049
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531 } \ |
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5bb080d35049
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532 n=n>>1; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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533 for(; n > 0; --n) { \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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534 double_pixel_copy_increment; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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535 } \ |
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5bb080d35049
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536 } |
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5bb080d35049
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537 |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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538 /* Don't use Duff's device to unroll loops */ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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539 #define DUFFS_LOOP_QUATRO2(pixel_copy_increment, \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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540 double_pixel_copy_increment, \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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541 quatro_pixel_copy_increment, width) \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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542 { int n = width; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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543 if(n & 1) { \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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544 pixel_copy_increment; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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545 n--; \ |
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Date: Tue, 19 Aug 2003 17:57:00 +0200
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546 } \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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547 if(n & 2) { \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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548 double_pixel_copy_increment; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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549 n -= 2; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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550 } \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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551 n=n>>2; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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552 for(; n > 0; --n) { \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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553 quatro_pixel_copy_increment; \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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554 } \ |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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555 } |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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556 |
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5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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557 /* Don't use Duff's device to unroll loops */ |
| 0 | 558 #define DUFFS_LOOP(pixel_copy_increment, width) \ |
| 559 { int n; \ | |
| 560 for ( n=width; n > 0; --n ) { \ | |
| 561 pixel_copy_increment; \ | |
| 562 } \ | |
| 563 } | |
| 564 #define DUFFS_LOOP8(pixel_copy_increment, width) \ | |
| 565 DUFFS_LOOP(pixel_copy_increment, width) | |
| 566 #define DUFFS_LOOP4(pixel_copy_increment, width) \ | |
| 567 DUFFS_LOOP(pixel_copy_increment, width) | |
| 568 | |
| 569 #endif /* USE_DUFFS_LOOP */ | |
| 570 | |
| 571 /* Prevent Visual C++ 6.0 from printing out stupid warnings */ | |
| 572 #if defined(_MSC_VER) && (_MSC_VER >= 600) | |
| 573 #pragma warning(disable: 4550) | |
| 574 #endif | |
| 575 | |
| 576 #endif /* _SDL_blit_h */ | |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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577 /* vi: set ts=4 sw=4 expandtab: */ |