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annotate src/video/SDL_blit.h @ 5093:2164a79b5ca9

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Only include windows.h on Windows. :)
author Sam Lantinga <slouken@libsdl.org>
date Mon, 24 Jan 2011 21:22:00 -0800
parents 1bceff8f008f
children e743b9c3f6d6
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2010 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 __MINGW32__
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28 #include <_mingw.h>
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29 #endif
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30
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31 #if defined(__MINGW32__) && defined(__MINGW64_VERSION_MAJOR)
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32 #include <intrin.h>
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33 #else
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34 #ifdef __MMX__
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35 #include <mmintrin.h>
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36 #endif
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37 #ifdef __3dNOW__
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38 #include <mm3dnow.h>
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39 #endif
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40 #ifdef __SSE__
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41 #include <xmmintrin.h>
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42 #endif
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43 #ifdef __SSE2__
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44 #include <emmintrin.h>
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45 #endif
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46 #endif
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47
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48 #include "SDL_cpuinfo.h"
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49 #include "SDL_endian.h"
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50 #include "SDL_video.h"
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51
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52 /* SDL blit copy flags */
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53 #define SDL_COPY_MODULATE_COLOR 0x00000001
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54 #define SDL_COPY_MODULATE_ALPHA 0x00000002
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55 #define SDL_COPY_MASK 0x00000010
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56 #define SDL_COPY_BLEND 0x00000020
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57 #define SDL_COPY_ADD 0x00000040
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58 #define SDL_COPY_MOD 0x00000080
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59 #define SDL_COPY_COLORKEY 0x00000100
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60 #define SDL_COPY_NEAREST 0x00000200
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61 #define SDL_COPY_RLE_DESIRED 0x00001000
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62 #define SDL_COPY_RLE_COLORKEY 0x00002000
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63 #define SDL_COPY_RLE_ALPHAKEY 0x00004000
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64 #define SDL_COPY_RLE_MASK (SDL_COPY_RLE_DESIRED|SDL_COPY_RLE_COLORKEY|SDL_COPY_RLE_ALPHAKEY)
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65
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66 /* SDL blit CPU flags */
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67 #define SDL_CPU_ANY 0x00000000
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68 #define SDL_CPU_MMX 0x00000001
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69 #define SDL_CPU_3DNOW 0x00000002
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70 #define SDL_CPU_SSE 0x00000004
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71 #define SDL_CPU_SSE2 0x00000008
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72 #define SDL_CPU_ALTIVEC_PREFETCH 0x00000010
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73 #define SDL_CPU_ALTIVEC_NOPREFETCH 0x00000020
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74
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75 typedef struct
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76 {
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77 Uint8 *src;
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78 int src_w, src_h;
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79 int src_pitch;
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80 int src_skip;
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81 Uint8 *dst;
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82 int dst_w, dst_h;
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83 int dst_pitch;
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84 int dst_skip;
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85 SDL_PixelFormat *src_fmt;
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86 SDL_PixelFormat *dst_fmt;
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87 Uint8 *table;
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88 int flags;
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89 Uint32 colorkey;
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90 Uint8 r, g, b, a;
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91 } SDL_BlitInfo;
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92
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93 typedef void (SDLCALL * SDL_BlitFunc) (SDL_BlitInfo * info);
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94
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95 typedef struct
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96 {
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97 Uint32 src_format;
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98 Uint32 dst_format;
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99 int flags;
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100 int cpu;
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101 SDL_BlitFunc func;
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102 } SDL_BlitFuncEntry;
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103
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104 /* Blit mapping definition */
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105 typedef struct SDL_BlitMap
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106 {
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107 SDL_Surface *dst;
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108 int identity;
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109 SDL_blit blit;
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110 void *data;
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111 SDL_BlitInfo info;
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112
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113 /* the version count matches the destination; mismatch indicates
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114 an invalid mapping */
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115 unsigned int format_version;
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116 } SDL_BlitMap;
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117
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118 /* Functions found in SDL_blit.c */
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119 extern int SDL_CalculateBlit(SDL_Surface * surface);
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120
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121 /* Functions found in SDL_blit_*.c */
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122 extern SDL_BlitFunc SDL_CalculateBlit0(SDL_Surface * surface);
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123 extern SDL_BlitFunc SDL_CalculateBlit1(SDL_Surface * surface);
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124 extern SDL_BlitFunc SDL_CalculateBlitN(SDL_Surface * surface);
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125 extern SDL_BlitFunc SDL_CalculateBlitA(SDL_Surface * surface);
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126
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127 /*
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128 * Useful macros for blitting routines
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129 */
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130
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131 #if defined(__GNUC__)
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132 #define DECLARE_ALIGNED(t,v,a) t __attribute__((aligned(a))) v
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133 #elif defined(_MSC_VER)
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134 #define DECLARE_ALIGNED(t,v,a) __declspec(align(a)) t v
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135 #else
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136 #define DECLARE_ALIGNED(t,v,a) t v
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137 #endif
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138
0
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139 #define FORMAT_EQUAL(A, B) \
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140 ((A)->BitsPerPixel == (B)->BitsPerPixel \
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141 && ((A)->Rmask == (B)->Rmask) && ((A)->Amask == (B)->Amask))
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142
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143 /* Load pixel of the specified format from a buffer and get its R-G-B values */
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144 /* FIXME: rescale values to 0..255 here? */
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145 #define RGB_FROM_PIXEL(Pixel, fmt, r, g, b) \
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146 { \
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147 r = (((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss); \
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148 g = (((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss); \
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149 b = (((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss); \
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150 }
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151 #define RGB_FROM_RGB565(Pixel, r, g, b) \
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152 { \
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153 r = (((Pixel&0xF800)>>11)<<3); \
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154 g = (((Pixel&0x07E0)>>5)<<2); \
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155 b = ((Pixel&0x001F)<<3); \
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156 }
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157 #define RGB_FROM_RGB555(Pixel, r, g, b) \
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158 { \
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159 r = (((Pixel&0x7C00)>>10)<<3); \
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160 g = (((Pixel&0x03E0)>>5)<<3); \
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161 b = ((Pixel&0x001F)<<3); \
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162 }
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163 #define RGB_FROM_RGB888(Pixel, r, g, b) \
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164 { \
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165 r = ((Pixel&0xFF0000)>>16); \
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166 g = ((Pixel&0xFF00)>>8); \
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167 b = (Pixel&0xFF); \
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168 }
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169 #define RETRIEVE_RGB_PIXEL(buf, bpp, Pixel) \
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170 do { \
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171 switch (bpp) { \
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172 case 2: \
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173 Pixel = *((Uint16 *)(buf)); \
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174 break; \
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175 \
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176 case 3: { \
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177 Uint8 *B = (Uint8 *)(buf); \
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178 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
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179 Pixel = B[0] + (B[1] << 8) + (B[2] << 16); \
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180 } else { \
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181 Pixel = (B[0] << 16) + (B[1] << 8) + B[2]; \
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182 } \
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183 } \
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184 break; \
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185 \
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186 case 4: \
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187 Pixel = *((Uint32 *)(buf)); \
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188 break; \
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189 \
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190 default: \
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191 Pixel; /* stop gcc complaints */ \
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192 break; \
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193 } \
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194 } while (0)
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195
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196 #define DISEMBLE_RGB(buf, bpp, fmt, Pixel, r, g, b) \
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197 do { \
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198 switch (bpp) { \
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199 case 2: \
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200 Pixel = *((Uint16 *)(buf)); \
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201 RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \
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202 break; \
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203 \
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204 case 3: { \
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205 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
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206 r = *((buf)+fmt->Rshift/8); \
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207 g = *((buf)+fmt->Gshift/8); \
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208 b = *((buf)+fmt->Bshift/8); \
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209 } else { \
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210 r = *((buf)+2-fmt->Rshift/8); \
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211 g = *((buf)+2-fmt->Gshift/8); \
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212 b = *((buf)+2-fmt->Bshift/8); \
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213 } \
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214 } \
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215 break; \
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216 \
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217 case 4: \
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218 Pixel = *((Uint32 *)(buf)); \
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219 RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \
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220 break; \
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221 \
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222 default: \
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223 Pixel; /* stop gcc complaints */ \
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224 break; \
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225 } \
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226 } while (0)
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227
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228 /* Assemble R-G-B values into a specified pixel format and store them */
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229 #define PIXEL_FROM_RGB(Pixel, fmt, r, g, b) \
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230 { \
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231 Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \
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232 ((g>>fmt->Gloss)<<fmt->Gshift)| \
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233 ((b>>fmt->Bloss)<<fmt->Bshift); \
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234 }
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235 #define RGB565_FROM_RGB(Pixel, r, g, b) \
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236 { \
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237 Pixel = ((r>>3)<<11)|((g>>2)<<5)|(b>>3); \
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238 }
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239 #define RGB555_FROM_RGB(Pixel, r, g, b) \
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240 { \
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241 Pixel = ((r>>3)<<10)|((g>>3)<<5)|(b>>3); \
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242 }
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243 #define RGB888_FROM_RGB(Pixel, r, g, b) \
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244 { \
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245 Pixel = (r<<16)|(g<<8)|b; \
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246 }
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247 #define ARGB8888_FROM_RGBA(Pixel, r, g, b, a) \
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248 { \
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249 Pixel = (a<<24)|(r<<16)|(g<<8)|b; \
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250 }
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251 #define RGBA8888_FROM_RGBA(Pixel, r, g, b, a) \
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252 { \
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253 Pixel = (r<<24)|(g<<16)|(b<<8)|a; \
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254 }
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255 #define ABGR8888_FROM_RGBA(Pixel, r, g, b, a) \
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256 { \
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257 Pixel = (a<<24)|(b<<16)|(g<<8)|r; \
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258 }
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259 #define BGRA8888_FROM_RGBA(Pixel, r, g, b, a) \
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260 { \
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261 Pixel = (b<<24)|(g<<16)|(r<<8)|a; \
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262 }
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263 #define ASSEMBLE_RGB(buf, bpp, fmt, r, g, b) \
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264 { \
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265 switch (bpp) { \
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266 case 2: { \
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267 Uint16 Pixel; \
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268 \
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269 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \
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270 *((Uint16 *)(buf)) = Pixel; \
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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 Pixel; \
0
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289 \
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290 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \
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291 *((Uint32 *)(buf)) = Pixel; \
0
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292 } \
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293 break; \
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294 } \
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295 }
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296 #define ASSEMBLE_RGB_AMASK(buf, bpp, fmt, r, g, b, Amask) \
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297 { \
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298 switch (bpp) { \
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299 case 2: { \
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300 Uint16 *bufp; \
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301 Uint16 Pixel; \
0
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302 \
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303 bufp = (Uint16 *)buf; \
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304 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \
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305 *bufp = Pixel | (*bufp & Amask); \
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306 } \
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307 break; \
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308 \
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309 case 3: { \
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310 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
0
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311 *((buf)+fmt->Rshift/8) = r; \
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312 *((buf)+fmt->Gshift/8) = g; \
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313 *((buf)+fmt->Bshift/8) = b; \
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314 } else { \
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315 *((buf)+2-fmt->Rshift/8) = r; \
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316 *((buf)+2-fmt->Gshift/8) = g; \
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317 *((buf)+2-fmt->Bshift/8) = b; \
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318 } \
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319 } \
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320 break; \
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321 \
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322 case 4: { \
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323 Uint32 *bufp; \
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324 Uint32 Pixel; \
0
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325 \
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326 bufp = (Uint32 *)buf; \
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327 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \
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328 *bufp = Pixel | (*bufp & Amask); \
0
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329 } \
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330 break; \
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331 } \
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332 }
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333
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334 /* FIXME: Should we rescale alpha into 0..255 here? */
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335 #define RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a) \
0
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336 { \
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337 r = ((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss; \
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338 g = ((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss; \
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339 b = ((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss; \
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340 a = ((Pixel&fmt->Amask)>>fmt->Ashift)<<fmt->Aloss; \
0
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341 }
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342 #define RGBA_FROM_8888(Pixel, fmt, r, g, b, a) \
0
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343 { \
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344 r = (Pixel&fmt->Rmask)>>fmt->Rshift; \
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345 g = (Pixel&fmt->Gmask)>>fmt->Gshift; \
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346 b = (Pixel&fmt->Bmask)>>fmt->Bshift; \
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347 a = (Pixel&fmt->Amask)>>fmt->Ashift; \
0
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348 }
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349 #define RGBA_FROM_RGBA8888(Pixel, r, g, b, a) \
0
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350 { \
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351 r = (Pixel>>24); \
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352 g = ((Pixel>>16)&0xFF); \
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353 b = ((Pixel>>8)&0xFF); \
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354 a = (Pixel&0xFF); \
0
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355 }
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356 #define RGBA_FROM_ARGB8888(Pixel, r, g, b, a) \
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357 { \
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358 r = ((Pixel>>16)&0xFF); \
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359 g = ((Pixel>>8)&0xFF); \
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360 b = (Pixel&0xFF); \
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361 a = (Pixel>>24); \
0
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362 }
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363 #define RGBA_FROM_ABGR8888(Pixel, r, g, b, a) \
0
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364 { \
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365 r = (Pixel&0xFF); \
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366 g = ((Pixel>>8)&0xFF); \
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367 b = ((Pixel>>16)&0xFF); \
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368 a = (Pixel>>24); \
0
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diff changeset
369 }
3054
8d93bfecb9dc Fixed alpha blending textures with the GDI renderer
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diff changeset
370 #define RGBA_FROM_BGRA8888(Pixel, r, g, b, a) \
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diff changeset
371 { \
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372 r = ((Pixel>>8)&0xFF); \
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373 g = ((Pixel>>16)&0xFF); \
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374 b = (Pixel>>24); \
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375 a = (Pixel&0xFF); \
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diff changeset
376 }
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377 #define DISEMBLE_RGBA(buf, bpp, fmt, Pixel, r, g, b, a) \
0
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diff changeset
378 do { \
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379 switch (bpp) { \
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380 case 2: \
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381 Pixel = *((Uint16 *)(buf)); \
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diff changeset
382 RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a); \
0
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diff changeset
383 break; \
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diff changeset
384 \
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diff changeset
385 case 3: { \
4dba7aa7ea77 Added slow but complete blit fallback
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diff changeset
386 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
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diff changeset
387 r = *((buf)+fmt->Rshift/8); \
4dba7aa7ea77 Added slow but complete blit fallback
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diff changeset
388 g = *((buf)+fmt->Gshift/8); \
4dba7aa7ea77 Added slow but complete blit fallback
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389 b = *((buf)+fmt->Bshift/8); \
0
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390 } else { \
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diff changeset
391 r = *((buf)+2-fmt->Rshift/8); \
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diff changeset
392 g = *((buf)+2-fmt->Gshift/8); \
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393 b = *((buf)+2-fmt->Bshift/8); \
0
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394 } \
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395 a = 0xFF; \
0
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parents:
diff changeset
396 } \
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diff changeset
397 break; \
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diff changeset
398 \
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diff changeset
399 case 4: \
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diff changeset
400 Pixel = *((Uint32 *)(buf)); \
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diff changeset
401 RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a); \
0
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diff changeset
402 break; \
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diff changeset
403 \
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diff changeset
404 default: \
2824
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diff changeset
405 Pixel; /* stop gcc complaints */ \
0
74212992fb08 Initial revision
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diff changeset
406 break; \
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parents:
diff changeset
407 } \
2824
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diff changeset
408 } while (0)
0
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parents:
diff changeset
409
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diff changeset
410 /* FIXME: this isn't correct, especially for Alpha (maximum != 255) */
1162
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diff changeset
411 #define PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a) \
0
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parents:
diff changeset
412 { \
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diff changeset
413 Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \
0
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diff changeset
414 ((g>>fmt->Gloss)<<fmt->Gshift)| \
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parents:
diff changeset
415 ((b>>fmt->Bloss)<<fmt->Bshift)| \
535
917cc5c56176 Fixed alpha blending bug (thanks Glenn!)
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parents: 297
diff changeset
416 ((a>>fmt->Aloss)<<fmt->Ashift); \
0
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parents:
diff changeset
417 }
74212992fb08 Initial revision
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diff changeset
418 #define ASSEMBLE_RGBA(buf, bpp, fmt, r, g, b, a) \
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parents:
diff changeset
419 { \
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parents:
diff changeset
420 switch (bpp) { \
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diff changeset
421 case 2: { \
1162
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diff changeset
422 Uint16 Pixel; \
0
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diff changeset
423 \
1162
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diff changeset
424 PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a); \
2651158f59b8 Enable altivec blitters on PowerPC Linux, and some fixes for recent
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parents: 1047
diff changeset
425 *((Uint16 *)(buf)) = Pixel; \
0
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parents:
diff changeset
426 } \
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parents:
diff changeset
427 break; \
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diff changeset
428 \
2824
4dba7aa7ea77 Added slow but complete blit fallback
Sam Lantinga <slouken@libsdl.org>
parents: 2267
diff changeset
429 case 3: { \
4dba7aa7ea77 Added slow but complete blit fallback
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parents: 2267
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430 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
0
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431 *((buf)+fmt->Rshift/8) = r; \
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432 *((buf)+fmt->Gshift/8) = g; \
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433 *((buf)+fmt->Bshift/8) = b; \
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434 } else { \
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diff changeset
435 *((buf)+2-fmt->Rshift/8) = r; \
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diff changeset
436 *((buf)+2-fmt->Gshift/8) = g; \
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437 *((buf)+2-fmt->Bshift/8) = b; \
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parents:
diff changeset
438 } \
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parents:
diff changeset
439 } \
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parents:
diff changeset
440 break; \
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441 \
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diff changeset
442 case 4: { \
1162
2651158f59b8 Enable altivec blitters on PowerPC Linux, and some fixes for recent
Ryan C. Gordon <icculus@icculus.org>
parents: 1047
diff changeset
443 Uint32 Pixel; \
0
74212992fb08 Initial revision
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444 \
1162
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Ryan C. Gordon <icculus@icculus.org>
parents: 1047
diff changeset
445 PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a); \
2651158f59b8 Enable altivec blitters on PowerPC Linux, and some fixes for recent
Ryan C. Gordon <icculus@icculus.org>
parents: 1047
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446 *((Uint32 *)(buf)) = Pixel; \
0
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parents:
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447 } \
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448 break; \
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449 } \
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450 }
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parents:
diff changeset
451
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parents: 1047
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452 /* Blend the RGB values of two Pixels based on a source alpha value */
0
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453 #define ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB) \
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parents:
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454 do { \
3631
76667e288846 Revert r5463: Alpha blend "correctness" patch.
Ryan C. Gordon <icculus@icculus.org>
parents: 3625
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455 dR = ((((int)(sR-dR)*(int)A)/255)+dR); \
76667e288846 Revert r5463: Alpha blend "correctness" patch.
Ryan C. Gordon <icculus@icculus.org>
parents: 3625
diff changeset
456 dG = ((((int)(sG-dG)*(int)A)/255)+dG); \
76667e288846 Revert r5463: Alpha blend "correctness" patch.
Ryan C. Gordon <icculus@icculus.org>
parents: 3625
diff changeset
457 dB = ((((int)(sB-dB)*(int)A)/255)+dB); \
1047
ffaaf7ecf685 Altivec-optimized blitters!
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parents: 769
diff changeset
458 } while(0)
ffaaf7ecf685 Altivec-optimized blitters!
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parents: 769
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459
ffaaf7ecf685 Altivec-optimized blitters!
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parents: 769
diff changeset
460
0
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parents:
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461 /* 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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parents: 535
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462 #if defined(_MSC_VER) && (_MSC_VER == 1300)
417f8709e648 There's a bug in the VC7 optimizer relating to the duff loop optimization
Sam Lantinga <slouken@libsdl.org>
parents: 535
diff changeset
463 /* 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
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parents: 535
diff changeset
464 #else
0
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465 #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
466 #endif
0
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diff changeset
467 #ifdef USE_DUFFS_LOOP
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468
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parents:
diff changeset
469 /* 8-times unrolled loop */
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parents:
diff changeset
470 #define DUFFS_LOOP8(pixel_copy_increment, width) \
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diff changeset
471 { int n = (width+7)/8; \
91
e85e03f195b4 From: "Markus F.X.J. Oberhumer"
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
472 switch (width & 7) { \
0
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parents:
diff changeset
473 case 0: do { pixel_copy_increment; \
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diff changeset
474 case 7: pixel_copy_increment; \
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diff changeset
475 case 6: pixel_copy_increment; \
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diff changeset
476 case 5: pixel_copy_increment; \
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
477 case 4: pixel_copy_increment; \
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parents:
diff changeset
478 case 3: pixel_copy_increment; \
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parents:
diff changeset
479 case 2: pixel_copy_increment; \
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parents:
diff changeset
480 case 1: pixel_copy_increment; \
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parents:
diff changeset
481 } while ( --n > 0 ); \
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parents:
diff changeset
482 } \
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diff changeset
483 }
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parents:
diff changeset
484
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parents:
diff changeset
485 /* 4-times unrolled loop */
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parents:
diff changeset
486 #define DUFFS_LOOP4(pixel_copy_increment, width) \
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diff changeset
487 { int n = (width+3)/4; \
91
e85e03f195b4 From: "Markus F.X.J. Oberhumer"
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
488 switch (width & 3) { \
0
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parents:
diff changeset
489 case 0: do { pixel_copy_increment; \
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diff changeset
490 case 3: pixel_copy_increment; \
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parents:
diff changeset
491 case 2: pixel_copy_increment; \
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parents:
diff changeset
492 case 1: pixel_copy_increment; \
3035
ff602fdfdedc Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents: 2899
diff changeset
493 } while (--n > 0); \
689
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
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
495 }
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
496
0
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parents:
diff changeset
497 /* Use the 8-times version of the loop by default */
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parents:
diff changeset
498 #define DUFFS_LOOP(pixel_copy_increment, width) \
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diff changeset
499 DUFFS_LOOP8(pixel_copy_increment, width)
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parents:
diff changeset
500
3035
ff602fdfdedc Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents: 2899
diff changeset
501 /* Special version of Duff's device for even more optimization */
ff602fdfdedc Removed Rafal Bursig's MMX RLE code, at his request.
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parents: 2899
diff changeset
502 #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
503 pixel_copy_increment2, \
ff602fdfdedc Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents: 2899
diff changeset
504 pixel_copy_increment4, width) \
ff602fdfdedc Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents: 2899
diff changeset
505 { int n = width; \
ff602fdfdedc Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents: 2899
diff changeset
506 if (n & 1) { \
ff602fdfdedc Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents: 2899
diff changeset
507 pixel_copy_increment1; n -= 1; \
ff602fdfdedc Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents: 2899
diff changeset
508 } \
ff602fdfdedc Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents: 2899
diff changeset
509 if (n & 2) { \
ff602fdfdedc Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents: 2899
diff changeset
510 pixel_copy_increment2; n -= 2; \
ff602fdfdedc Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents: 2899
diff changeset
511 } \
ff602fdfdedc Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents: 2899
diff changeset
512 if (n) { \
ff602fdfdedc Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents: 2899
diff changeset
513 n = (n+7)/ 8; \
ff602fdfdedc Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents: 2899
diff changeset
514 switch (n & 4) { \
ff602fdfdedc Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents: 2899
diff changeset
515 case 0: do { pixel_copy_increment4; \
ff602fdfdedc Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents: 2899
diff changeset
516 case 4: pixel_copy_increment4; \
ff602fdfdedc Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents: 2899
diff changeset
517 } while (--n > 0); \
ff602fdfdedc Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents: 2899
diff changeset
518 } \
ff602fdfdedc Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents: 2899
diff changeset
519 } \
689
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
520 }
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
521
3035
ff602fdfdedc Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents: 2899
diff changeset
522 #else
689
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Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
523
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
524 /* Don't use Duff's device to unroll loops */
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
525 #define DUFFS_LOOP(pixel_copy_increment, width) \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
526 { int n; \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
527 for ( n=width; n > 0; --n ) { \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
528 pixel_copy_increment; \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
529 } \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
530 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
531 #define DUFFS_LOOP8(pixel_copy_increment, width) \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
532 DUFFS_LOOP(pixel_copy_increment, width)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
533 #define DUFFS_LOOP4(pixel_copy_increment, width) \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
534 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
535 #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
536 pixel_copy_increment2, \
ff602fdfdedc Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents: 2899
diff changeset
537 pixel_copy_increment4, width) \
ff602fdfdedc Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents: 2899
diff changeset
538 DUFFS_LOOP(pixel_copy_increment1, width)
0
74212992fb08 Initial revision
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parents:
diff changeset
539
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
540 #endif /* USE_DUFFS_LOOP */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
541
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
542 /* Prevent Visual C++ 6.0 from printing out stupid warnings */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
543 #if defined(_MSC_VER) && (_MSC_VER >= 600)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
544 #pragma warning(disable: 4550)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
545 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
546
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
547 #endif /* _SDL_blit_h */
2898
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
548
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
549 /* vi: set ts=4 sw=4 expandtab: */