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annotate src/video/SDL_blit.h @ 2266:e61ad15a205f

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More work in progress integrating SDL_Surface and the new SDL_Texture API
author Sam Lantinga <slouken@libsdl.org>
date Sat, 18 Aug 2007 01:44:21 +0000
parents 900c35d8e8fd
children c785543d1843
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 Sam Lantinga
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4
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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
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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.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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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
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 #ifndef _SDL_blit_h
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25 #define _SDL_blit_h
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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"
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41 #include "SDL_endian.h"
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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 Uint8 *src;
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67 int src_w, src_h;
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68 int src_pitch;
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69 Uint8 *dst;
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70 int dst_w, dst_h;
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71 int dst_pitch;
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72 SDL_PixelFormat *src_fmt;
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73 SDL_PixelFormat *dst_fmt;
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74 Uint8 *table;
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75 int flags;
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76 Uint32 colorkey;
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77 Uint8 r, g, b, a;
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78 } SDL_BlitInfo;
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79
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80 typedef void (SDLCALL * SDL_BlitFunc)(SDL_BlitInfo *info);
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81
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82 typedef struct {
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83 Uint32 src_format;
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84 Uint32 dst_format;
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85 int flags;
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86 int cpu;
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87 SDL_BlitFunc func;
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88 } SDL_BlitFuncEntry;
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89
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90 /* Blit mapping definition */
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91 typedef struct SDL_BlitMap
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92 {
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93 SDL_Surface *dst;
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94 int identity;
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95 SDL_blit blit;
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96 void *data;
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97 SDL_BlitInfo info;
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98
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99 /* the version count matches the destination; mismatch indicates
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100 an invalid mapping */
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101 unsigned int format_version;
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102 } SDL_BlitMap;
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103
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104 /* Functions found in SDL_blit.c */
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105 extern int SDL_CalculateBlit(SDL_Surface * surface);
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106
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107 /* Blit function tables in SDL_blit_*.c */
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108 extern SDL_BlitFuncEntry SDL_BlitFuncTable0[];
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109 extern SDL_BlitFuncEntry SDL_BlitFuncTable1[];
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110 extern SDL_BlitFuncEntry SDL_BlitFuncTableN[];
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111
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112 /*
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113 * Useful macros for blitting routines
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114 */
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115
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116 #if defined(__GNUC__)
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117 #define DECLARE_ALIGNED(t,v,a) t __attribute__((aligned(a))) v
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118 #elif defined(_MSC_VER)
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119 #define DECLARE_ALIGNED(t,v,a) __declspec(align(a)) t v
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120 #else
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121 #define DECLARE_ALIGNED(t,v,a) t v
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122 #endif
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123
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124 #define FORMAT_EQUAL(A, B) \
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125 ((A)->BitsPerPixel == (B)->BitsPerPixel \
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126 && ((A)->Rmask == (B)->Rmask) && ((A)->Amask == (B)->Amask))
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127
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128 /* Load pixel of the specified format from a buffer and get its R-G-B values */
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129 /* FIXME: rescale values to 0..255 here? */
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130 #define RGB_FROM_PIXEL(Pixel, fmt, r, g, b) \
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131 { \
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132 r = (((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss); \
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133 g = (((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss); \
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134 b = (((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss); \
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135 }
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136 #define RGB_FROM_RGB565(Pixel, r, g, b) \
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137 { \
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138 r = (((Pixel&0xF800)>>11)<<3); \
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139 g = (((Pixel&0x07E0)>>5)<<2); \
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140 b = ((Pixel&0x001F)<<3); \
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141 }
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142 #define RGB_FROM_RGB555(Pixel, r, g, b) \
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143 { \
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144 r = (((Pixel&0x7C00)>>10)<<3); \
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145 g = (((Pixel&0x03E0)>>5)<<3); \
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146 b = ((Pixel&0x001F)<<3); \
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147 }
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148 #define RGB_FROM_RGB888(Pixel, r, g, b) \
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149 { \
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150 r = ((Pixel&0xFF0000)>>16); \
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151 g = ((Pixel&0xFF00)>>8); \
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152 b = (Pixel&0xFF); \
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153 }
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154 #define RETRIEVE_RGB_PIXEL(buf, bpp, Pixel) \
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155 do { \
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156 switch (bpp) { \
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157 case 2: \
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158 Pixel = *((Uint16 *)(buf)); \
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159 break; \
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160 \
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161 case 3: { \
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162 Uint8 *B = (Uint8 *)(buf); \
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163 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
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164 Pixel = B[0] + (B[1] << 8) + (B[2] << 16); \
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165 } else { \
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166 Pixel = (B[0] << 16) + (B[1] << 8) + B[2]; \
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167 } \
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168 } \
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169 break; \
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170 \
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171 case 4: \
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172 Pixel = *((Uint32 *)(buf)); \
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173 break; \
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174 \
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175 default: \
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176 Pixel = 0; /* appease gcc */ \
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177 break; \
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178 } \
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179 } while(0)
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180
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181 #define DISEMBLE_RGB(buf, bpp, fmt, Pixel, r, g, b) \
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182 do { \
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183 switch (bpp) { \
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184 case 2: \
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185 Pixel = *((Uint16 *)(buf)); \
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186 break; \
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187 \
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188 case 3: { \
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189 Uint8 *B = (Uint8 *)buf; \
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190 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
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191 Pixel = B[0] + (B[1] << 8) + (B[2] << 16); \
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192 } else { \
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193 Pixel = (B[0] << 16) + (B[1] << 8) + B[2]; \
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194 } \
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195 } \
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196 break; \
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197 \
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198 case 4: \
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199 Pixel = *((Uint32 *)(buf)); \
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200 break; \
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201 \
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202 default: \
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203 Pixel = 0; /* prevent gcc from complaining */ \
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204 break; \
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205 } \
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206 RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \
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207 } while(0)
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208
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209 /* Assemble R-G-B values into a specified pixel format and store them */
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210 #define PIXEL_FROM_RGB(Pixel, fmt, r, g, b) \
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211 { \
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212 Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \
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213 ((g>>fmt->Gloss)<<fmt->Gshift)| \
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214 ((b>>fmt->Bloss)<<fmt->Bshift); \
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215 }
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216 #define RGB565_FROM_RGB(Pixel, r, g, b) \
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217 { \
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218 Pixel = ((r>>3)<<11)|((g>>2)<<5)|(b>>3); \
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219 }
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220 #define RGB555_FROM_RGB(Pixel, r, g, b) \
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221 { \
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222 Pixel = ((r>>3)<<10)|((g>>3)<<5)|(b>>3); \
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223 }
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224 #define RGB888_FROM_RGB(Pixel, r, g, b) \
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225 { \
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226 Pixel = (r<<16)|(g<<8)|b; \
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227 }
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228 #define ASSEMBLE_RGB(buf, bpp, fmt, r, g, b) \
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229 { \
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230 switch (bpp) { \
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231 case 2: { \
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232 Uint16 Pixel; \
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233 \
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234 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \
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235 *((Uint16 *)(buf)) = Pixel; \
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236 } \
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237 break; \
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238 \
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239 case 3: { \
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240 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
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241 *((buf)+fmt->Rshift/8) = r; \
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242 *((buf)+fmt->Gshift/8) = g; \
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243 *((buf)+fmt->Bshift/8) = b; \
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244 } else { \
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245 *((buf)+2-fmt->Rshift/8) = r; \
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246 *((buf)+2-fmt->Gshift/8) = g; \
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247 *((buf)+2-fmt->Bshift/8) = b; \
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248 } \
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249 } \
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250 break; \
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251 \
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252 case 4: { \
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253 Uint32 Pixel; \
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254 \
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255 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \
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256 *((Uint32 *)(buf)) = Pixel; \
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257 } \
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258 break; \
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259 } \
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260 }
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261 #define ASSEMBLE_RGB_AMASK(buf, bpp, fmt, r, g, b, Amask) \
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262 { \
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263 switch (bpp) { \
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264 case 2: { \
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265 Uint16 *bufp; \
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266 Uint16 Pixel; \
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267 \
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268 bufp = (Uint16 *)buf; \
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269 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \
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270 *bufp = Pixel | (*bufp & Amask); \
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271 } \
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272 break; \
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273 \
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274 case 3: { \
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275 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
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276 *((buf)+fmt->Rshift/8) = r; \
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277 *((buf)+fmt->Gshift/8) = g; \
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278 *((buf)+fmt->Bshift/8) = b; \
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279 } else { \
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280 *((buf)+2-fmt->Rshift/8) = r; \
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281 *((buf)+2-fmt->Gshift/8) = g; \
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282 *((buf)+2-fmt->Bshift/8) = b; \
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283 } \
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284 } \
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285 break; \
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286 \
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287 case 4: { \
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288 Uint32 *bufp; \
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289 Uint32 Pixel; \
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290 \
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291 bufp = (Uint32 *)buf; \
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292 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \
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293 *bufp = Pixel | (*bufp & Amask); \
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294 } \
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295 break; \
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296 } \
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297 }
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298
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299 /* FIXME: Should we rescale alpha into 0..255 here? */
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300 #define RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a) \
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301 { \
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302 r = ((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss; \
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303 g = ((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss; \
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304 b = ((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss; \
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305 a = ((Pixel&fmt->Amask)>>fmt->Ashift)<<fmt->Aloss; \
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306 }
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307 #define RGBA_FROM_8888(Pixel, fmt, r, g, b, a) \
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308 { \
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309 r = (Pixel&fmt->Rmask)>>fmt->Rshift; \
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310 g = (Pixel&fmt->Gmask)>>fmt->Gshift; \
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311 b = (Pixel&fmt->Bmask)>>fmt->Bshift; \
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312 a = (Pixel&fmt->Amask)>>fmt->Ashift; \
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313 }
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314 #define RGBA_FROM_RGBA8888(Pixel, r, g, b, a) \
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315 { \
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316 r = (Pixel>>24); \
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317 g = ((Pixel>>16)&0xFF); \
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318 b = ((Pixel>>8)&0xFF); \
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319 a = (Pixel&0xFF); \
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320 }
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321 #define RGBA_FROM_ARGB8888(Pixel, r, g, b, a) \
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322 { \
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323 r = ((Pixel>>16)&0xFF); \
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324 g = ((Pixel>>8)&0xFF); \
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325 b = (Pixel&0xFF); \
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326 a = (Pixel>>24); \
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327 }
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328 #define RGBA_FROM_ABGR8888(Pixel, r, g, b, a) \
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329 { \
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330 r = (Pixel&0xFF); \
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331 g = ((Pixel>>8)&0xFF); \
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332 b = ((Pixel>>16)&0xFF); \
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333 a = (Pixel>>24); \
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334 }
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335 #define DISEMBLE_RGBA(buf, bpp, fmt, Pixel, r, g, b, a) \
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336 do { \
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337 switch (bpp) { \
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338 case 2: \
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339 Pixel = *((Uint16 *)(buf)); \
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340 break; \
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341 \
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342 case 3: {/* FIXME: broken code (no alpha) */ \
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343 Uint8 *b = (Uint8 *)buf; \
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344 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
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345 Pixel = b[0] + (b[1] << 8) + (b[2] << 16); \
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346 } else { \
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347 Pixel = (b[0] << 16) + (b[1] << 8) + b[2]; \
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348 } \
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349 } \
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350 break; \
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351 \
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352 case 4: \
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353 Pixel = *((Uint32 *)(buf)); \
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354 break; \
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355 \
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356 default: \
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357 Pixel = 0; /* stop gcc complaints */ \
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358 break; \
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359 } \
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360 RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a); \
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361 Pixel &= ~fmt->Amask; \
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362 } while(0)
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363
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364 /* FIXME: this isn't correct, especially for Alpha (maximum != 255) */
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365 #define PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a) \
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366 { \
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367 Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \
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368 ((g>>fmt->Gloss)<<fmt->Gshift)| \
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369 ((b>>fmt->Bloss)<<fmt->Bshift)| \
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370 ((a>>fmt->Aloss)<<fmt->Ashift); \
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371 }
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372 #define ASSEMBLE_RGBA(buf, bpp, fmt, r, g, b, a) \
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373 { \
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374 switch (bpp) { \
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375 case 2: { \
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376 Uint16 Pixel; \
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377 \
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378 PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a); \
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379 *((Uint16 *)(buf)) = Pixel; \
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380 } \
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381 break; \
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382 \
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383 case 3: { /* FIXME: broken code (no alpha) */ \
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384 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
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385 *((buf)+fmt->Rshift/8) = r; \
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386 *((buf)+fmt->Gshift/8) = g; \
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387 *((buf)+fmt->Bshift/8) = b; \
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388 } else { \
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389 *((buf)+2-fmt->Rshift/8) = r; \
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390 *((buf)+2-fmt->Gshift/8) = g; \
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391 *((buf)+2-fmt->Bshift/8) = b; \
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392 } \
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393 } \
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394 break; \
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395 \
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396 case 4: { \
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397 Uint32 Pixel; \
0
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398 \
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399 PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a); \
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400 *((Uint32 *)(buf)) = Pixel; \
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401 } \
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402 break; \
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403 } \
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404 }
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405
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406 /* Blend the RGB values of two Pixels based on a source alpha value */
0
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407 #define ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB) \
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408 do { \
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409 dR = (((sR-dR)*(A))>>8)+dR; \
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410 dG = (((sG-dG)*(A))>>8)+dG; \
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411 dB = (((sB-dB)*(A))>>8)+dB; \
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412 } while(0)
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413
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414 /* Blend the RGB values of two Pixels based on a source alpha value */
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415 #define ACCURATE_ALPHA_BLEND(sR, sG, sB, sA, dR, dG, dB) \
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416 do { \
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417 unsigned tR, tG, tB, tA; \
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418 tA = 255 - sA; \
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419 tR = 1 + (sR * sA) + (dR * tA); \
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420 dR = (tR + (tR >> 8)) >> 8; \
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421 tG = 1 + (sG * sA) + (dG * tA); \
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422 dG = (tG + (tG >> 8)) >> 8; \
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423 tB = 1 + (sB * sA) + (dB * tA); \
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424 dB = (tB + (tB >> 8)) >> 8; \
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425 } while(0)
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426
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427
0
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428 /* This is a very useful loop for optimizing blitters */
553
417f8709e648 There's a bug in the VC7 optimizer relating to the duff loop optimization
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diff changeset
429 #if defined(_MSC_VER) && (_MSC_VER == 1300)
417f8709e648 There's a bug in the VC7 optimizer relating to the duff loop optimization
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diff changeset
430 /* There's a bug in the Visual C++ 7 optimizer when compiling this code */
417f8709e648 There's a bug in the VC7 optimizer relating to the duff loop optimization
Sam Lantinga <slouken@libsdl.org>
parents: 535
diff changeset
431 #else
0
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diff changeset
432 #define USE_DUFFS_LOOP
553
417f8709e648 There's a bug in the VC7 optimizer relating to the duff loop optimization
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parents: 535
diff changeset
433 #endif
0
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diff changeset
434 #ifdef USE_DUFFS_LOOP
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435
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parents:
diff changeset
436 /* 8-times unrolled loop */
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parents:
diff changeset
437 #define DUFFS_LOOP8(pixel_copy_increment, width) \
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parents:
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438 { int n = (width+7)/8; \
91
e85e03f195b4 From: "Markus F.X.J. Oberhumer"
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
439 switch (width & 7) { \
0
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440 case 0: do { pixel_copy_increment; \
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441 case 7: pixel_copy_increment; \
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442 case 6: pixel_copy_increment; \
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443 case 5: pixel_copy_increment; \
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parents:
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444 case 4: pixel_copy_increment; \
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445 case 3: pixel_copy_increment; \
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diff changeset
446 case 2: pixel_copy_increment; \
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diff changeset
447 case 1: pixel_copy_increment; \
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parents:
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448 } while ( --n > 0 ); \
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parents:
diff changeset
449 } \
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450 }
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parents:
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451
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parents:
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452 /* 4-times unrolled loop */
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453 #define DUFFS_LOOP4(pixel_copy_increment, width) \
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454 { int n = (width+3)/4; \
91
e85e03f195b4 From: "Markus F.X.J. Oberhumer"
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parents: 0
diff changeset
455 switch (width & 3) { \
0
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456 case 0: do { pixel_copy_increment; \
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457 case 3: pixel_copy_increment; \
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458 case 2: pixel_copy_increment; \
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459 case 1: pixel_copy_increment; \
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460 } while ( --n > 0 ); \
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parents:
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461 } \
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462 }
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463
689
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parents: 553
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464 /* 2 - times unrolled loop */
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
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465 #define DUFFS_LOOP_DOUBLE2(pixel_copy_increment, \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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466 double_pixel_copy_increment, width) \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
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467 { int n, w = width; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
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468 if( w & 1 ) { \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
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469 pixel_copy_increment; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
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470 w--; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
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471 } \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
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472 if ( w > 0 ) { \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
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473 n = ( w + 2) / 4; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
474 switch( w & 2 ) { \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
475 case 0: do { double_pixel_copy_increment; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
476 case 2: double_pixel_copy_increment; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
477 } while ( --n > 0 ); \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
478 } \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
479 } \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
480 }
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
481
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
482 /* 2 - times unrolled loop 4 pixels */
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
483 #define DUFFS_LOOP_QUATRO2(pixel_copy_increment, \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
484 double_pixel_copy_increment, \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
485 quatro_pixel_copy_increment, width) \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
486 { int n, w = width; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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diff changeset
487 if(w & 1) { \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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diff changeset
488 pixel_copy_increment; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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diff changeset
489 w--; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
490 } \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
491 if(w & 2) { \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
492 double_pixel_copy_increment; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
493 w -= 2; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
494 } \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
495 if ( w > 0 ) { \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
496 n = ( w + 7 ) / 8; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
497 switch( w & 4 ) { \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
498 case 0: do { quatro_pixel_copy_increment; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
499 case 4: quatro_pixel_copy_increment; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
500 } while ( --n > 0 ); \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
501 } \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
502 } \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
503 }
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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diff changeset
504
0
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parents:
diff changeset
505 /* Use the 8-times version of the loop by default */
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parents:
diff changeset
506 #define DUFFS_LOOP(pixel_copy_increment, width) \
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parents:
diff changeset
507 DUFFS_LOOP8(pixel_copy_increment, width)
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diff changeset
508
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diff changeset
509 #else
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diff changeset
510
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diff changeset
511 /* Don't use Duff's device to unroll loops */
689
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parents: 553
diff changeset
512 #define DUFFS_LOOP_DOUBLE2(pixel_copy_increment, \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
513 double_pixel_copy_increment, width) \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
514 { int n = width; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
515 if( n & 1 ) { \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
516 pixel_copy_increment; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
517 n--; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
518 } \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
519 n=n>>1; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
520 for(; n > 0; --n) { \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
521 double_pixel_copy_increment; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
522 } \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
523 }
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
524
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
525 /* Don't use Duff's device to unroll loops */
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
526 #define DUFFS_LOOP_QUATRO2(pixel_copy_increment, \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
527 double_pixel_copy_increment, \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
528 quatro_pixel_copy_increment, width) \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
529 { int n = width; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
530 if(n & 1) { \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
531 pixel_copy_increment; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
532 n--; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
533 } \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
534 if(n & 2) { \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
535 double_pixel_copy_increment; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
536 n -= 2; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
537 } \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
538 n=n>>2; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
539 for(; n > 0; --n) { \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
540 quatro_pixel_copy_increment; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
541 } \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
542 }
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
543
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
544 /* Don't use Duff's device to unroll loops */
0
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parents:
diff changeset
545 #define DUFFS_LOOP(pixel_copy_increment, width) \
74212992fb08 Initial revision
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parents:
diff changeset
546 { int n; \
74212992fb08 Initial revision
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parents:
diff changeset
547 for ( n=width; n > 0; --n ) { \
74212992fb08 Initial revision
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parents:
diff changeset
548 pixel_copy_increment; \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
549 } \
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parents:
diff changeset
550 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
551 #define DUFFS_LOOP8(pixel_copy_increment, width) \
74212992fb08 Initial revision
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parents:
diff changeset
552 DUFFS_LOOP(pixel_copy_increment, width)
74212992fb08 Initial revision
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parents:
diff changeset
553 #define DUFFS_LOOP4(pixel_copy_increment, width) \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
554 DUFFS_LOOP(pixel_copy_increment, width)
74212992fb08 Initial revision
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parents:
diff changeset
555
74212992fb08 Initial revision
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parents:
diff changeset
556 #endif /* USE_DUFFS_LOOP */
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parents:
diff changeset
557
74212992fb08 Initial revision
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parents:
diff changeset
558 /* Prevent Visual C++ 6.0 from printing out stupid warnings */
74212992fb08 Initial revision
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parents:
diff changeset
559 #if defined(_MSC_VER) && (_MSC_VER >= 600)
74212992fb08 Initial revision
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parents:
diff changeset
560 #pragma warning(disable: 4550)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
561 #endif
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parents:
diff changeset
562
74212992fb08 Initial revision
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parents:
diff changeset
563 #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>
parents: 1402
diff changeset
564 /* vi: set ts=4 sw=4 expandtab: */