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annotate src/video/SDL_blit.h @ 3075:4c28a9655933

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Fixed bug using SDL_WINDOWPOS_CENTERED with SDL_SetWindowPosition()
author Sam Lantinga <slouken@libsdl.org>
date Thu, 19 Feb 2009 04:15:04 +0000
parents 8d93bfecb9dc
children 90aec03bf9fd
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 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 #include "SDL_video.h"
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43
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44 /* SDL blit copy flags */
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45 #define SDL_COPY_MODULATE_COLOR 0x00000001
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46 #define SDL_COPY_MODULATE_ALPHA 0x00000002
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47 #define SDL_COPY_MASK 0x00000010
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48 #define SDL_COPY_BLEND 0x00000020
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49 #define SDL_COPY_ADD 0x00000040
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50 #define SDL_COPY_MOD 0x00000080
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51 #define SDL_COPY_COLORKEY 0x00000100
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52 #define SDL_COPY_NEAREST 0x00000200
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53 #define SDL_COPY_RLE_DESIRED 0x00001000
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54 #define SDL_COPY_RLE_COLORKEY 0x00002000
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55 #define SDL_COPY_RLE_ALPHAKEY 0x00004000
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56 #define SDL_COPY_RLE_MASK (SDL_COPY_RLE_DESIRED|SDL_COPY_RLE_COLORKEY|SDL_COPY_RLE_ALPHAKEY)
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57
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58 /* SDL blit CPU flags */
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59 #define SDL_CPU_ANY 0x00000000
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60 #define SDL_CPU_MMX 0x00000001
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61 #define SDL_CPU_3DNOW 0x00000002
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62 #define SDL_CPU_SSE 0x00000004
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63 #define SDL_CPU_SSE2 0x00000008
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64 #define SDL_CPU_ALTIVEC_PREFETCH 0x00000010
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65 #define SDL_CPU_ALTIVEC_NOPREFETCH 0x00000020
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66
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67 typedef struct
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68 {
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69 Uint8 *src;
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70 int src_w, src_h;
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71 int src_pitch;
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72 int src_skip;
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73 Uint8 *dst;
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74 int dst_w, dst_h;
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75 int dst_pitch;
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76 int dst_skip;
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77 SDL_PixelFormat *src_fmt;
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78 SDL_PixelFormat *dst_fmt;
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79 Uint8 *table;
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80 int flags;
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81 Uint32 colorkey;
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82 Uint8 r, g, b, a;
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83 } SDL_BlitInfo;
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84
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85 typedef void (SDLCALL * SDL_BlitFunc) (SDL_BlitInfo * info);
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86
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87 typedef struct
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88 {
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89 Uint32 src_format;
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90 Uint32 dst_format;
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91 int flags;
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92 int cpu;
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93 SDL_BlitFunc func;
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94 } SDL_BlitFuncEntry;
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95
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96 /* Blit mapping definition */
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97 typedef struct SDL_BlitMap
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98 {
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99 SDL_Surface *dst;
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100 int identity;
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101 SDL_blit blit;
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102 void *data;
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103 SDL_BlitInfo info;
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104
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105 /* the version count matches the destination; mismatch indicates
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106 an invalid mapping */
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107 unsigned int format_version;
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108 } SDL_BlitMap;
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109
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110 /* Functions found in SDL_blit.c */
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111 extern int SDL_CalculateBlit(SDL_Surface * surface);
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112
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113 /* Functions found in SDL_blit_*.c */
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114 extern SDL_BlitFunc SDL_CalculateBlit0(SDL_Surface * surface);
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115 extern SDL_BlitFunc SDL_CalculateBlit1(SDL_Surface * surface);
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116 extern SDL_BlitFunc SDL_CalculateBlitN(SDL_Surface * surface);
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117 extern SDL_BlitFunc SDL_CalculateBlitA(SDL_Surface * surface);
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118
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119 /*
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120 * Useful macros for blitting routines
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121 */
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122
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123 #if defined(__GNUC__)
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124 #define DECLARE_ALIGNED(t,v,a) t __attribute__((aligned(a))) v
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125 #elif defined(_MSC_VER)
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126 #define DECLARE_ALIGNED(t,v,a) __declspec(align(a)) t v
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127 #else
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128 #define DECLARE_ALIGNED(t,v,a) t v
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129 #endif
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130
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131 #define FORMAT_EQUAL(A, B) \
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132 ((A)->BitsPerPixel == (B)->BitsPerPixel \
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133 && ((A)->Rmask == (B)->Rmask) && ((A)->Amask == (B)->Amask))
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134
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135 /* Load pixel of the specified format from a buffer and get its R-G-B values */
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136 /* FIXME: rescale values to 0..255 here? */
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137 #define RGB_FROM_PIXEL(Pixel, fmt, r, g, b) \
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138 { \
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139 r = (((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss); \
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140 g = (((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss); \
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141 b = (((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss); \
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142 }
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143 #define RGB_FROM_RGB565(Pixel, r, g, b) \
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144 { \
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145 r = (((Pixel&0xF800)>>11)<<3); \
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146 g = (((Pixel&0x07E0)>>5)<<2); \
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147 b = ((Pixel&0x001F)<<3); \
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148 }
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149 #define RGB_FROM_RGB555(Pixel, r, g, b) \
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150 { \
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151 r = (((Pixel&0x7C00)>>10)<<3); \
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152 g = (((Pixel&0x03E0)>>5)<<3); \
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153 b = ((Pixel&0x001F)<<3); \
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154 }
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155 #define RGB_FROM_RGB888(Pixel, r, g, b) \
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156 { \
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157 r = ((Pixel&0xFF0000)>>16); \
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158 g = ((Pixel&0xFF00)>>8); \
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159 b = (Pixel&0xFF); \
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160 }
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161 #define RETRIEVE_RGB_PIXEL(buf, bpp, Pixel) \
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162 do { \
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163 switch (bpp) { \
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164 case 2: \
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165 Pixel = *((Uint16 *)(buf)); \
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166 break; \
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167 \
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168 case 3: { \
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169 Uint8 *B = (Uint8 *)(buf); \
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170 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
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171 Pixel = B[0] + (B[1] << 8) + (B[2] << 16); \
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172 } else { \
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173 Pixel = (B[0] << 16) + (B[1] << 8) + B[2]; \
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174 } \
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175 } \
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176 break; \
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177 \
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178 case 4: \
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179 Pixel = *((Uint32 *)(buf)); \
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180 break; \
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181 \
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182 default: \
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183 Pixel; /* stop gcc complaints */ \
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184 break; \
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185 } \
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186 } while (0)
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187
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188 #define DISEMBLE_RGB(buf, bpp, fmt, Pixel, r, g, b) \
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189 do { \
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190 switch (bpp) { \
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191 case 2: \
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192 Pixel = *((Uint16 *)(buf)); \
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193 RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \
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194 break; \
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195 \
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196 case 3: { \
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197 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
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198 r = *((buf)+fmt->Rshift/8); \
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199 g = *((buf)+fmt->Gshift/8); \
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200 b = *((buf)+fmt->Bshift/8); \
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201 } else { \
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202 r = *((buf)+2-fmt->Rshift/8); \
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203 g = *((buf)+2-fmt->Gshift/8); \
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204 b = *((buf)+2-fmt->Bshift/8); \
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205 } \
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206 } \
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207 break; \
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208 \
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209 case 4: \
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210 Pixel = *((Uint32 *)(buf)); \
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211 RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \
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212 break; \
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213 \
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214 default: \
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215 Pixel; /* stop gcc complaints */ \
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216 break; \
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217 } \
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218 } while (0)
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219
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220 /* Assemble R-G-B values into a specified pixel format and store them */
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221 #define PIXEL_FROM_RGB(Pixel, fmt, r, g, b) \
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222 { \
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223 Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \
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224 ((g>>fmt->Gloss)<<fmt->Gshift)| \
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225 ((b>>fmt->Bloss)<<fmt->Bshift); \
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226 }
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227 #define RGB565_FROM_RGB(Pixel, r, g, b) \
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228 { \
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229 Pixel = ((r>>3)<<11)|((g>>2)<<5)|(b>>3); \
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230 }
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231 #define RGB555_FROM_RGB(Pixel, r, g, b) \
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232 { \
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233 Pixel = ((r>>3)<<10)|((g>>3)<<5)|(b>>3); \
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234 }
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235 #define RGB888_FROM_RGB(Pixel, r, g, b) \
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236 { \
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237 Pixel = (r<<16)|(g<<8)|b; \
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238 }
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239 #define ARGB8888_FROM_RGBA(Pixel, r, g, b, a) \
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240 { \
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241 Pixel = (a<<24)|(r<<16)|(g<<8)|b; \
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242 }
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243 #define RGBA8888_FROM_RGBA(Pixel, r, g, b, a) \
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244 { \
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245 Pixel = (r<<24)|(g<<16)|(b<<8)|a; \
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246 }
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247 #define ABGR8888_FROM_RGBA(Pixel, r, g, b, a) \
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248 { \
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249 Pixel = (a<<24)|(b<<16)|(g<<8)|r; \
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250 }
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251 #define BGRA8888_FROM_RGBA(Pixel, r, g, b, a) \
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252 { \
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253 Pixel = (b<<24)|(g<<16)|(r<<8)|a; \
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254 }
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255 #define ASSEMBLE_RGB(buf, bpp, fmt, r, g, b) \
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256 { \
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257 switch (bpp) { \
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258 case 2: { \
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259 Uint16 Pixel; \
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260 \
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261 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \
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262 *((Uint16 *)(buf)) = Pixel; \
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263 } \
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264 break; \
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265 \
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266 case 3: { \
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267 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
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268 *((buf)+fmt->Rshift/8) = r; \
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269 *((buf)+fmt->Gshift/8) = g; \
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270 *((buf)+fmt->Bshift/8) = b; \
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271 } else { \
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272 *((buf)+2-fmt->Rshift/8) = r; \
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273 *((buf)+2-fmt->Gshift/8) = g; \
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274 *((buf)+2-fmt->Bshift/8) = b; \
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275 } \
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276 } \
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277 break; \
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278 \
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279 case 4: { \
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280 Uint32 Pixel; \
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281 \
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282 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \
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283 *((Uint32 *)(buf)) = Pixel; \
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284 } \
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285 break; \
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286 } \
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287 }
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288 #define ASSEMBLE_RGB_AMASK(buf, bpp, fmt, r, g, b, Amask) \
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289 { \
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290 switch (bpp) { \
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291 case 2: { \
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292 Uint16 *bufp; \
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293 Uint16 Pixel; \
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294 \
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295 bufp = (Uint16 *)buf; \
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296 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \
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297 *bufp = Pixel | (*bufp & Amask); \
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298 } \
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299 break; \
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300 \
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301 case 3: { \
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302 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
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303 *((buf)+fmt->Rshift/8) = r; \
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304 *((buf)+fmt->Gshift/8) = g; \
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305 *((buf)+fmt->Bshift/8) = b; \
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306 } else { \
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307 *((buf)+2-fmt->Rshift/8) = r; \
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308 *((buf)+2-fmt->Gshift/8) = g; \
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309 *((buf)+2-fmt->Bshift/8) = b; \
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310 } \
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311 } \
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312 break; \
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313 \
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314 case 4: { \
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315 Uint32 *bufp; \
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316 Uint32 Pixel; \
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317 \
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318 bufp = (Uint32 *)buf; \
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319 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \
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320 *bufp = Pixel | (*bufp & Amask); \
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321 } \
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322 break; \
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323 } \
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324 }
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325
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326 /* FIXME: Should we rescale alpha into 0..255 here? */
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327 #define RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a) \
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328 { \
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329 r = ((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss; \
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330 g = ((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss; \
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331 b = ((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss; \
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332 a = ((Pixel&fmt->Amask)>>fmt->Ashift)<<fmt->Aloss; \
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333 }
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334 #define RGBA_FROM_8888(Pixel, fmt, r, g, b, a) \
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335 { \
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336 r = (Pixel&fmt->Rmask)>>fmt->Rshift; \
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337 g = (Pixel&fmt->Gmask)>>fmt->Gshift; \
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338 b = (Pixel&fmt->Bmask)>>fmt->Bshift; \
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339 a = (Pixel&fmt->Amask)>>fmt->Ashift; \
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340 }
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341 #define RGBA_FROM_RGBA8888(Pixel, r, g, b, a) \
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342 { \
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343 r = (Pixel>>24); \
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344 g = ((Pixel>>16)&0xFF); \
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345 b = ((Pixel>>8)&0xFF); \
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346 a = (Pixel&0xFF); \
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347 }
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348 #define RGBA_FROM_ARGB8888(Pixel, r, g, b, a) \
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349 { \
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350 r = ((Pixel>>16)&0xFF); \
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351 g = ((Pixel>>8)&0xFF); \
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352 b = (Pixel&0xFF); \
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353 a = (Pixel>>24); \
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354 }
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355 #define RGBA_FROM_ABGR8888(Pixel, r, g, b, a) \
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356 { \
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357 r = (Pixel&0xFF); \
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358 g = ((Pixel>>8)&0xFF); \
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359 b = ((Pixel>>16)&0xFF); \
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360 a = (Pixel>>24); \
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361 }
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362 #define RGBA_FROM_BGRA8888(Pixel, r, g, b, a) \
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363 { \
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364 r = ((Pixel>>8)&0xFF); \
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365 g = ((Pixel>>16)&0xFF); \
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366 b = (Pixel>>24); \
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367 a = (Pixel&0xFF); \
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368 }
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369 #define DISEMBLE_RGBA(buf, bpp, fmt, Pixel, r, g, b, a) \
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370 do { \
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371 switch (bpp) { \
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372 case 2: \
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373 Pixel = *((Uint16 *)(buf)); \
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374 RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a); \
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375 break; \
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376 \
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377 case 3: { \
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378 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
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379 r = *((buf)+fmt->Rshift/8); \
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380 g = *((buf)+fmt->Gshift/8); \
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381 b = *((buf)+fmt->Bshift/8); \
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382 } else { \
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383 r = *((buf)+2-fmt->Rshift/8); \
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384 g = *((buf)+2-fmt->Gshift/8); \
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385 b = *((buf)+2-fmt->Bshift/8); \
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386 } \
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387 a = 0xFF; \
0
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388 } \
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389 break; \
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390 \
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391 case 4: \
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392 Pixel = *((Uint32 *)(buf)); \
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393 RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a); \
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394 break; \
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395 \
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396 default: \
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diff changeset
397 Pixel; /* stop gcc complaints */ \
0
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398 break; \
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399 } \
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400 } while (0)
0
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401
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402 /* FIXME: this isn't correct, especially for Alpha (maximum != 255) */
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403 #define PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a) \
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404 { \
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405 Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \
0
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406 ((g>>fmt->Gloss)<<fmt->Gshift)| \
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407 ((b>>fmt->Bloss)<<fmt->Bshift)| \
535
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diff changeset
408 ((a>>fmt->Aloss)<<fmt->Ashift); \
0
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diff changeset
409 }
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410 #define ASSEMBLE_RGBA(buf, bpp, fmt, r, g, b, a) \
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diff changeset
411 { \
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412 switch (bpp) { \
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413 case 2: { \
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diff changeset
414 Uint16 Pixel; \
0
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415 \
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416 PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a); \
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diff changeset
417 *((Uint16 *)(buf)) = Pixel; \
0
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diff changeset
418 } \
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419 break; \
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420 \
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421 case 3: { \
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422 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
0
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diff changeset
423 *((buf)+fmt->Rshift/8) = r; \
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424 *((buf)+fmt->Gshift/8) = g; \
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parents:
diff changeset
425 *((buf)+fmt->Bshift/8) = b; \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
426 } else { \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
427 *((buf)+2-fmt->Rshift/8) = r; \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
428 *((buf)+2-fmt->Gshift/8) = g; \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
429 *((buf)+2-fmt->Bshift/8) = b; \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
430 } \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
431 } \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
432 break; \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
433 \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
434 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
435 Uint32 Pixel; \
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
436 \
1162
2651158f59b8 Enable altivec blitters on PowerPC Linux, and some fixes for recent
Ryan C. Gordon <icculus@icculus.org>
parents: 1047
diff changeset
437 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
diff changeset
438 *((Uint32 *)(buf)) = Pixel; \
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
439 } \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
440 break; \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
441 } \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
442 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
443
1162
2651158f59b8 Enable altivec blitters on PowerPC Linux, and some fixes for recent
Ryan C. Gordon <icculus@icculus.org>
parents: 1047
diff changeset
444 /* Blend the RGB values of two Pixels based on a source alpha value */
0
74212992fb08 Initial revision
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parents:
diff changeset
445 #define ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB) \
74212992fb08 Initial revision
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parents:
diff changeset
446 do { \
74212992fb08 Initial revision
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parents:
diff changeset
447 dR = (((sR-dR)*(A))>>8)+dR; \
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parents:
diff changeset
448 dG = (((sG-dG)*(A))>>8)+dG; \
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parents:
diff changeset
449 dB = (((sB-dB)*(A))>>8)+dB; \
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parents:
diff changeset
450 } while(0)
74212992fb08 Initial revision
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parents:
diff changeset
451
1162
2651158f59b8 Enable altivec blitters on PowerPC Linux, and some fixes for recent
Ryan C. Gordon <icculus@icculus.org>
parents: 1047
diff changeset
452 /* Blend the RGB values of two Pixels based on a source alpha value */
1047
ffaaf7ecf685 Altivec-optimized blitters!
Ryan C. Gordon <icculus@icculus.org>
parents: 769
diff changeset
453 #define ACCURATE_ALPHA_BLEND(sR, sG, sB, sA, dR, dG, dB) \
ffaaf7ecf685 Altivec-optimized blitters!
Ryan C. Gordon <icculus@icculus.org>
parents: 769
diff changeset
454 do { \
ffaaf7ecf685 Altivec-optimized blitters!
Ryan C. Gordon <icculus@icculus.org>
parents: 769
diff changeset
455 unsigned tR, tG, tB, tA; \
ffaaf7ecf685 Altivec-optimized blitters!
Ryan C. Gordon <icculus@icculus.org>
parents: 769
diff changeset
456 tA = 255 - sA; \
ffaaf7ecf685 Altivec-optimized blitters!
Ryan C. Gordon <icculus@icculus.org>
parents: 769
diff changeset
457 tR = 1 + (sR * sA) + (dR * tA); \
ffaaf7ecf685 Altivec-optimized blitters!
Ryan C. Gordon <icculus@icculus.org>
parents: 769
diff changeset
458 dR = (tR + (tR >> 8)) >> 8; \
ffaaf7ecf685 Altivec-optimized blitters!
Ryan C. Gordon <icculus@icculus.org>
parents: 769
diff changeset
459 tG = 1 + (sG * sA) + (dG * tA); \
ffaaf7ecf685 Altivec-optimized blitters!
Ryan C. Gordon <icculus@icculus.org>
parents: 769
diff changeset
460 dG = (tG + (tG >> 8)) >> 8; \
ffaaf7ecf685 Altivec-optimized blitters!
Ryan C. Gordon <icculus@icculus.org>
parents: 769
diff changeset
461 tB = 1 + (sB * sA) + (dB * tA); \
ffaaf7ecf685 Altivec-optimized blitters!
Ryan C. Gordon <icculus@icculus.org>
parents: 769
diff changeset
462 dB = (tB + (tB >> 8)) >> 8; \
ffaaf7ecf685 Altivec-optimized blitters!
Ryan C. Gordon <icculus@icculus.org>
parents: 769
diff changeset
463 } while(0)
ffaaf7ecf685 Altivec-optimized blitters!
Ryan C. Gordon <icculus@icculus.org>
parents: 769
diff changeset
464
ffaaf7ecf685 Altivec-optimized blitters!
Ryan C. Gordon <icculus@icculus.org>
parents: 769
diff changeset
465
0
74212992fb08 Initial revision
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parents:
diff changeset
466 /* 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
Sam Lantinga <slouken@libsdl.org>
parents: 535
diff changeset
467 #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
468 /* 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
469 #else
0
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parents:
diff changeset
470 #define USE_DUFFS_LOOP
553
417f8709e648 There's a bug in the VC7 optimizer relating to the duff loop optimization
Sam Lantinga <slouken@libsdl.org>
parents: 535
diff changeset
471 #endif
0
74212992fb08 Initial revision
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parents:
diff changeset
472 #ifdef USE_DUFFS_LOOP
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
473
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parents:
diff changeset
474 /* 8-times unrolled loop */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
475 #define DUFFS_LOOP8(pixel_copy_increment, width) \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
476 { int n = (width+7)/8; \
91
e85e03f195b4 From: "Markus F.X.J. Oberhumer"
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
477 switch (width & 7) { \
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
478 case 0: do { pixel_copy_increment; \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
479 case 7: pixel_copy_increment; \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
480 case 6: pixel_copy_increment; \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
481 case 5: pixel_copy_increment; \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
482 case 4: pixel_copy_increment; \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
483 case 3: pixel_copy_increment; \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
484 case 2: pixel_copy_increment; \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
485 case 1: pixel_copy_increment; \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
486 } while ( --n > 0 ); \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
487 } \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
488 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
489
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
490 /* 4-times unrolled loop */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
491 #define DUFFS_LOOP4(pixel_copy_increment, width) \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
492 { int n = (width+3)/4; \
91
e85e03f195b4 From: "Markus F.X.J. Oberhumer"
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
493 switch (width & 3) { \
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
494 case 0: do { pixel_copy_increment; \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
495 case 3: pixel_copy_increment; \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
496 case 2: pixel_copy_increment; \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
497 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
498 } while (--n > 0); \
689
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
499 } \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
500 }
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
501
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
502 /* Use the 8-times version of the loop by default */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
503 #define DUFFS_LOOP(pixel_copy_increment, width) \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
504 DUFFS_LOOP8(pixel_copy_increment, width)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
505
3035
ff602fdfdedc Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents: 2899
diff changeset
506 /* Special version of Duff's device for even more optimization */
ff602fdfdedc Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents: 2899
diff changeset
507 #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
508 pixel_copy_increment2, \
ff602fdfdedc Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents: 2899
diff changeset
509 pixel_copy_increment4, width) \
ff602fdfdedc Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents: 2899
diff changeset
510 { int n = width; \
ff602fdfdedc Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents: 2899
diff changeset
511 if (n & 1) { \
ff602fdfdedc Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents: 2899
diff changeset
512 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
513 } \
ff602fdfdedc Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents: 2899
diff changeset
514 if (n & 2) { \
ff602fdfdedc Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents: 2899
diff changeset
515 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
516 } \
ff602fdfdedc Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents: 2899
diff changeset
517 if (n) { \
ff602fdfdedc Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents: 2899
diff changeset
518 n = (n+7)/ 8; \
ff602fdfdedc Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents: 2899
diff changeset
519 switch (n & 4) { \
ff602fdfdedc Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents: 2899
diff changeset
520 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
521 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
522 } while (--n > 0); \
ff602fdfdedc Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents: 2899
diff changeset
523 } \
ff602fdfdedc Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents: 2899
diff changeset
524 } \
689
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
525 }
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
526
3035
ff602fdfdedc Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents: 2899
diff changeset
527 #else
689
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
528
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
529 /* Don't use Duff's device to unroll loops */
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
530 #define DUFFS_LOOP(pixel_copy_increment, width) \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
531 { int n; \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
532 for ( n=width; n > 0; --n ) { \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
533 pixel_copy_increment; \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
534 } \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
535 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
536 #define DUFFS_LOOP8(pixel_copy_increment, width) \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
537 DUFFS_LOOP(pixel_copy_increment, width)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
538 #define DUFFS_LOOP4(pixel_copy_increment, width) \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
539 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
540 #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
541 pixel_copy_increment2, \
ff602fdfdedc Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents: 2899
diff changeset
542 pixel_copy_increment4, width) \
ff602fdfdedc Removed Rafal Bursig's MMX RLE code, at his request.
Sam Lantinga <slouken@libsdl.org>
parents: 2899
diff changeset
543 DUFFS_LOOP(pixel_copy_increment1, width)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
544
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
545 #endif /* USE_DUFFS_LOOP */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
546
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
547 /* Prevent Visual C++ 6.0 from printing out stupid warnings */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
548 #if defined(_MSC_VER) && (_MSC_VER >= 600)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
549 #pragma warning(disable: 4550)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
550 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
551
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
552 #endif /* _SDL_blit_h */
2898
e40448bc7727 Share code between fill and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
553
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
554 /* vi: set ts=4 sw=4 expandtab: */