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annotate src/video/SDL_blit.h @ 2582:9f0f0a532343 gsoc2008_force_feedback

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Fixed warning.
author Edgar Simo <bobbens@gmail.com>
date Mon, 04 Aug 2008 11:30:16 +0000
parents c785543d1843
children 4dba7aa7ea77
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 #ifndef _SDL_blit_h
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25 #define _SDL_blit_h
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26
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27 #ifdef __MMX__
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28 #include <mmintrin.h>
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29 #endif
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30 #ifdef __3dNOW__
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31 #include <mm3dnow.h>
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32 #endif
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33 #ifdef __SSE__
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34 #include <xmmintrin.h>
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35 #endif
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36 #ifdef __SSE2__
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37 #include <emmintrin.h>
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38 #endif
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39
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40 #include "SDL_cpuinfo.h"
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41 #include "SDL_endian.h"
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42
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43 /* SDL blit copy flags */
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44 #define SDL_COPY_MODULATE_COLOR 0x00000001
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45 #define SDL_COPY_MODULATE_ALPHA 0x00000002
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46 #define SDL_COPY_MASK 0x00000010
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47 #define SDL_COPY_BLEND 0x00000020
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48 #define SDL_COPY_ADD 0x00000040
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49 #define SDL_COPY_MOD 0x00000080
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50 #define SDL_COPY_COLORKEY 0x00000100
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51 #define SDL_COPY_NEAREST 0x00000200
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52 #define SDL_COPY_RLE_DESIRED 0x00001000
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53 #define SDL_COPY_RLE_COLORKEY 0x00002000
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54 #define SDL_COPY_RLE_ALPHAKEY 0x00004000
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55
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56 /* SDL blit CPU flags */
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57 #define SDL_CPU_ANY 0x00000000
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58 #define SDL_CPU_MMX 0x00000001
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59 #define SDL_CPU_3DNOW 0x00000002
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60 #define SDL_CPU_SSE 0x00000004
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61 #define SDL_CPU_SSE2 0x00000008
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62 #define SDL_CPU_ALTIVEC_PREFETCH 0x00000010
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63 #define SDL_CPU_ALTIVEC_NOPREFETCH 0x00000020
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64
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65 typedef struct
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66 {
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67 Uint8 *src;
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68 int src_w, src_h;
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69 int src_pitch;
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70 int src_skip;
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71 Uint8 *dst;
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72 int dst_w, dst_h;
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73 int dst_pitch;
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74 int dst_skip;
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75 SDL_PixelFormat *src_fmt;
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76 SDL_PixelFormat *dst_fmt;
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77 Uint8 *table;
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78 int flags;
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79 Uint32 colorkey;
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80 Uint8 r, g, b, a;
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81 } SDL_BlitInfo;
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82
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83 typedef void (SDLCALL * SDL_BlitFunc) (SDL_BlitInfo * info);
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84
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85 typedef struct
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86 {
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87 Uint32 src_format;
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88 Uint32 dst_format;
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89 int flags;
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90 int cpu;
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91 SDL_BlitFunc func;
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92 } SDL_BlitFuncEntry;
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93
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94 /* Blit mapping definition */
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95 typedef struct SDL_BlitMap
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96 {
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97 SDL_Surface *dst;
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98 int identity;
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99 SDL_blit blit;
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100 void *data;
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101 SDL_BlitInfo info;
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102
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103 /* the version count matches the destination; mismatch indicates
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104 an invalid mapping */
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105 unsigned int format_version;
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106 } SDL_BlitMap;
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107
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108 /* Functions found in SDL_blit.c */
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109 extern int SDL_CalculateBlit(SDL_Surface * surface);
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110
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111 /* Functions found in SDL_blit_*.c */
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112 extern SDL_BlitFunc SDL_CalculateBlit0(SDL_Surface * surface);
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113 extern SDL_BlitFunc SDL_CalculateBlit1(SDL_Surface * surface);
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114 extern SDL_BlitFunc SDL_CalculateBlitN(SDL_Surface * surface);
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115 extern SDL_BlitFunc SDL_CalculateBlitA(SDL_Surface * surface);
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116
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117 /*
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118 * Useful macros for blitting routines
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119 */
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120
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121 #if defined(__GNUC__)
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122 #define DECLARE_ALIGNED(t,v,a) t __attribute__((aligned(a))) v
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123 #elif defined(_MSC_VER)
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124 #define DECLARE_ALIGNED(t,v,a) __declspec(align(a)) t v
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125 #else
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126 #define DECLARE_ALIGNED(t,v,a) t v
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127 #endif
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128
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129 #define FORMAT_EQUAL(A, B) \
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130 ((A)->BitsPerPixel == (B)->BitsPerPixel \
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131 && ((A)->Rmask == (B)->Rmask) && ((A)->Amask == (B)->Amask))
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132
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133 /* Load pixel of the specified format from a buffer and get its R-G-B values */
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134 /* FIXME: rescale values to 0..255 here? */
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135 #define RGB_FROM_PIXEL(Pixel, fmt, r, g, b) \
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136 { \
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137 r = (((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss); \
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138 g = (((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss); \
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139 b = (((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss); \
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140 }
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141 #define RGB_FROM_RGB565(Pixel, r, g, b) \
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142 { \
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143 r = (((Pixel&0xF800)>>11)<<3); \
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144 g = (((Pixel&0x07E0)>>5)<<2); \
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145 b = ((Pixel&0x001F)<<3); \
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146 }
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147 #define RGB_FROM_RGB555(Pixel, r, g, b) \
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148 { \
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149 r = (((Pixel&0x7C00)>>10)<<3); \
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150 g = (((Pixel&0x03E0)>>5)<<3); \
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151 b = ((Pixel&0x001F)<<3); \
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152 }
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153 #define RGB_FROM_RGB888(Pixel, r, g, b) \
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154 { \
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155 r = ((Pixel&0xFF0000)>>16); \
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156 g = ((Pixel&0xFF00)>>8); \
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157 b = (Pixel&0xFF); \
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158 }
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159 #define RETRIEVE_RGB_PIXEL(buf, bpp, Pixel) \
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160 do { \
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161 switch (bpp) { \
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162 case 2: \
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163 Pixel = *((Uint16 *)(buf)); \
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164 break; \
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165 \
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166 case 3: { \
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167 Uint8 *B = (Uint8 *)(buf); \
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168 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
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169 Pixel = B[0] + (B[1] << 8) + (B[2] << 16); \
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170 } else { \
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171 Pixel = (B[0] << 16) + (B[1] << 8) + B[2]; \
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172 } \
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173 } \
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174 break; \
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175 \
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176 case 4: \
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177 Pixel = *((Uint32 *)(buf)); \
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178 break; \
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179 \
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180 default: \
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181 Pixel = 0; /* appease gcc */ \
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182 break; \
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183 } \
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184 } while(0)
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185
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186 #define DISEMBLE_RGB(buf, bpp, fmt, Pixel, r, g, b) \
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187 do { \
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188 switch (bpp) { \
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189 case 2: \
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190 Pixel = *((Uint16 *)(buf)); \
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191 break; \
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192 \
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193 case 3: { \
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194 Uint8 *B = (Uint8 *)buf; \
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195 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
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196 Pixel = B[0] + (B[1] << 8) + (B[2] << 16); \
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197 } else { \
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198 Pixel = (B[0] << 16) + (B[1] << 8) + B[2]; \
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199 } \
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200 } \
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201 break; \
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202 \
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203 case 4: \
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204 Pixel = *((Uint32 *)(buf)); \
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205 break; \
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206 \
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207 default: \
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208 Pixel = 0; /* prevent gcc from complaining */ \
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209 break; \
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210 } \
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211 RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \
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212 } while(0)
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213
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214 /* Assemble R-G-B values into a specified pixel format and store them */
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215 #define PIXEL_FROM_RGB(Pixel, fmt, r, g, b) \
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216 { \
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217 Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \
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218 ((g>>fmt->Gloss)<<fmt->Gshift)| \
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219 ((b>>fmt->Bloss)<<fmt->Bshift); \
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220 }
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221 #define RGB565_FROM_RGB(Pixel, r, g, b) \
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222 { \
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223 Pixel = ((r>>3)<<11)|((g>>2)<<5)|(b>>3); \
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224 }
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225 #define RGB555_FROM_RGB(Pixel, r, g, b) \
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226 { \
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227 Pixel = ((r>>3)<<10)|((g>>3)<<5)|(b>>3); \
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228 }
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229 #define RGB888_FROM_RGB(Pixel, r, g, b) \
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230 { \
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231 Pixel = (r<<16)|(g<<8)|b; \
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232 }
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233 #define ASSEMBLE_RGB(buf, bpp, fmt, r, g, b) \
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234 { \
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235 switch (bpp) { \
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236 case 2: { \
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237 Uint16 Pixel; \
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238 \
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239 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \
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240 *((Uint16 *)(buf)) = Pixel; \
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241 } \
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242 break; \
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243 \
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244 case 3: { \
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245 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
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246 *((buf)+fmt->Rshift/8) = r; \
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247 *((buf)+fmt->Gshift/8) = g; \
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248 *((buf)+fmt->Bshift/8) = b; \
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249 } else { \
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250 *((buf)+2-fmt->Rshift/8) = r; \
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251 *((buf)+2-fmt->Gshift/8) = g; \
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252 *((buf)+2-fmt->Bshift/8) = b; \
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253 } \
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254 } \
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255 break; \
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256 \
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257 case 4: { \
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258 Uint32 Pixel; \
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259 \
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260 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \
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261 *((Uint32 *)(buf)) = Pixel; \
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262 } \
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263 break; \
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264 } \
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265 }
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266 #define ASSEMBLE_RGB_AMASK(buf, bpp, fmt, r, g, b, Amask) \
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267 { \
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268 switch (bpp) { \
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269 case 2: { \
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270 Uint16 *bufp; \
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271 Uint16 Pixel; \
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272 \
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273 bufp = (Uint16 *)buf; \
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274 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \
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275 *bufp = Pixel | (*bufp & Amask); \
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276 } \
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277 break; \
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278 \
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279 case 3: { \
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280 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
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281 *((buf)+fmt->Rshift/8) = r; \
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282 *((buf)+fmt->Gshift/8) = g; \
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283 *((buf)+fmt->Bshift/8) = b; \
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284 } else { \
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285 *((buf)+2-fmt->Rshift/8) = r; \
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286 *((buf)+2-fmt->Gshift/8) = g; \
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287 *((buf)+2-fmt->Bshift/8) = b; \
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288 } \
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289 } \
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290 break; \
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291 \
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292 case 4: { \
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293 Uint32 *bufp; \
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294 Uint32 Pixel; \
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295 \
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296 bufp = (Uint32 *)buf; \
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297 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \
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298 *bufp = Pixel | (*bufp & Amask); \
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299 } \
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300 break; \
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301 } \
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302 }
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303
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304 /* FIXME: Should we rescale alpha into 0..255 here? */
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305 #define RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a) \
0
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306 { \
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307 r = ((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss; \
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308 g = ((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss; \
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309 b = ((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss; \
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310 a = ((Pixel&fmt->Amask)>>fmt->Ashift)<<fmt->Aloss; \
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311 }
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312 #define RGBA_FROM_8888(Pixel, fmt, r, g, b, a) \
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313 { \
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314 r = (Pixel&fmt->Rmask)>>fmt->Rshift; \
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315 g = (Pixel&fmt->Gmask)>>fmt->Gshift; \
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316 b = (Pixel&fmt->Bmask)>>fmt->Bshift; \
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317 a = (Pixel&fmt->Amask)>>fmt->Ashift; \
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318 }
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319 #define RGBA_FROM_RGBA8888(Pixel, r, g, b, a) \
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320 { \
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321 r = (Pixel>>24); \
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322 g = ((Pixel>>16)&0xFF); \
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323 b = ((Pixel>>8)&0xFF); \
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324 a = (Pixel&0xFF); \
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325 }
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326 #define RGBA_FROM_ARGB8888(Pixel, r, g, b, a) \
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327 { \
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328 r = ((Pixel>>16)&0xFF); \
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329 g = ((Pixel>>8)&0xFF); \
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330 b = (Pixel&0xFF); \
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331 a = (Pixel>>24); \
0
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332 }
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333 #define RGBA_FROM_ABGR8888(Pixel, r, g, b, a) \
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334 { \
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335 r = (Pixel&0xFF); \
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336 g = ((Pixel>>8)&0xFF); \
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337 b = ((Pixel>>16)&0xFF); \
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338 a = (Pixel>>24); \
0
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339 }
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340 #define DISEMBLE_RGBA(buf, bpp, fmt, Pixel, r, g, b, a) \
0
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341 do { \
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342 switch (bpp) { \
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343 case 2: \
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344 Pixel = *((Uint16 *)(buf)); \
0
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345 break; \
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346 \
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347 case 3: {/* FIXME: broken code (no alpha) */ \
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348 Uint8 *b = (Uint8 *)buf; \
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349 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
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350 Pixel = b[0] + (b[1] << 8) + (b[2] << 16); \
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351 } else { \
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352 Pixel = (b[0] << 16) + (b[1] << 8) + b[2]; \
0
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353 } \
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354 } \
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355 break; \
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356 \
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357 case 4: \
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358 Pixel = *((Uint32 *)(buf)); \
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359 break; \
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360 \
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361 default: \
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362 Pixel = 0; /* stop gcc complaints */ \
0
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363 break; \
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364 } \
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365 RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a); \
2651158f59b8 Enable altivec blitters on PowerPC Linux, and some fixes for recent
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366 Pixel &= ~fmt->Amask; \
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367 } while(0)
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368
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369 /* FIXME: this isn't correct, especially for Alpha (maximum != 255) */
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370 #define PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a) \
0
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371 { \
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372 Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \
0
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373 ((g>>fmt->Gloss)<<fmt->Gshift)| \
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374 ((b>>fmt->Bloss)<<fmt->Bshift)| \
535
917cc5c56176 Fixed alpha blending bug (thanks Glenn!)
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diff changeset
375 ((a>>fmt->Aloss)<<fmt->Ashift); \
0
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376 }
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377 #define ASSEMBLE_RGBA(buf, bpp, fmt, r, g, b, a) \
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378 { \
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379 switch (bpp) { \
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380 case 2: { \
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381 Uint16 Pixel; \
0
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382 \
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383 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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384 *((Uint16 *)(buf)) = Pixel; \
0
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385 } \
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386 break; \
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diff changeset
387 \
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388 case 3: { /* FIXME: broken code (no alpha) */ \
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389 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
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diff changeset
390 *((buf)+fmt->Rshift/8) = r; \
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diff changeset
391 *((buf)+fmt->Gshift/8) = g; \
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diff changeset
392 *((buf)+fmt->Bshift/8) = b; \
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diff changeset
393 } else { \
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diff changeset
394 *((buf)+2-fmt->Rshift/8) = r; \
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diff changeset
395 *((buf)+2-fmt->Gshift/8) = g; \
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diff changeset
396 *((buf)+2-fmt->Bshift/8) = b; \
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diff changeset
397 } \
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diff changeset
398 } \
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399 break; \
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diff changeset
400 \
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diff changeset
401 case 4: { \
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402 Uint32 Pixel; \
0
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diff changeset
403 \
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404 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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405 *((Uint32 *)(buf)) = Pixel; \
0
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parents:
diff changeset
406 } \
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diff changeset
407 break; \
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diff changeset
408 } \
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diff changeset
409 }
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diff changeset
410
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diff changeset
411 /* Blend the RGB values of two Pixels based on a source alpha value */
0
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412 #define ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB) \
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diff changeset
413 do { \
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diff changeset
414 dR = (((sR-dR)*(A))>>8)+dR; \
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diff changeset
415 dG = (((sG-dG)*(A))>>8)+dG; \
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diff changeset
416 dB = (((sB-dB)*(A))>>8)+dB; \
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diff changeset
417 } while(0)
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diff changeset
418
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419 /* Blend the RGB values of two Pixels based on a source alpha value */
1047
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diff changeset
420 #define ACCURATE_ALPHA_BLEND(sR, sG, sB, sA, dR, dG, dB) \
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421 do { \
ffaaf7ecf685 Altivec-optimized blitters!
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422 unsigned tR, tG, tB, tA; \
ffaaf7ecf685 Altivec-optimized blitters!
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423 tA = 255 - sA; \
ffaaf7ecf685 Altivec-optimized blitters!
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424 tR = 1 + (sR * sA) + (dR * tA); \
ffaaf7ecf685 Altivec-optimized blitters!
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425 dR = (tR + (tR >> 8)) >> 8; \
ffaaf7ecf685 Altivec-optimized blitters!
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426 tG = 1 + (sG * sA) + (dG * tA); \
ffaaf7ecf685 Altivec-optimized blitters!
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427 dG = (tG + (tG >> 8)) >> 8; \
ffaaf7ecf685 Altivec-optimized blitters!
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428 tB = 1 + (sB * sA) + (dB * tA); \
ffaaf7ecf685 Altivec-optimized blitters!
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diff changeset
429 dB = (tB + (tB >> 8)) >> 8; \
ffaaf7ecf685 Altivec-optimized blitters!
Ryan C. Gordon <icculus@icculus.org>
parents: 769
diff changeset
430 } while(0)
ffaaf7ecf685 Altivec-optimized blitters!
Ryan C. Gordon <icculus@icculus.org>
parents: 769
diff changeset
431
ffaaf7ecf685 Altivec-optimized blitters!
Ryan C. Gordon <icculus@icculus.org>
parents: 769
diff changeset
432
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
433 /* 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
434 #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
435 /* 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
436 #else
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
437 #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
438 #endif
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
439 #ifdef USE_DUFFS_LOOP
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
440
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
441 /* 8-times unrolled loop */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
442 #define DUFFS_LOOP8(pixel_copy_increment, width) \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
443 { int n = (width+7)/8; \
91
e85e03f195b4 From: "Markus F.X.J. Oberhumer"
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
444 switch (width & 7) { \
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
445 case 0: do { pixel_copy_increment; \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
446 case 7: pixel_copy_increment; \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
447 case 6: pixel_copy_increment; \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
448 case 5: pixel_copy_increment; \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
449 case 4: pixel_copy_increment; \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
450 case 3: pixel_copy_increment; \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
451 case 2: pixel_copy_increment; \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
452 case 1: pixel_copy_increment; \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
453 } while ( --n > 0 ); \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
454 } \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
455 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
456
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
457 /* 4-times unrolled loop */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
458 #define DUFFS_LOOP4(pixel_copy_increment, width) \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
459 { int n = (width+3)/4; \
91
e85e03f195b4 From: "Markus F.X.J. Oberhumer"
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
460 switch (width & 3) { \
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
461 case 0: do { pixel_copy_increment; \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
462 case 3: pixel_copy_increment; \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
463 case 2: pixel_copy_increment; \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
464 case 1: pixel_copy_increment; \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
465 } while ( --n > 0 ); \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
466 } \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
467 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
468
689
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
469 /* 2 - times unrolled loop */
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
470 #define DUFFS_LOOP_DOUBLE2(pixel_copy_increment, \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
471 double_pixel_copy_increment, width) \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
472 { int n, w = width; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
473 if( w & 1 ) { \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
474 pixel_copy_increment; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
475 w--; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
476 } \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
477 if ( w > 0 ) { \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
478 n = ( w + 2) / 4; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
479 switch( w & 2 ) { \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
480 case 0: do { double_pixel_copy_increment; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
481 case 2: double_pixel_copy_increment; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
482 } while ( --n > 0 ); \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
483 } \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
484 } \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
485 }
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
486
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
487 /* 2 - times unrolled loop 4 pixels */
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
488 #define DUFFS_LOOP_QUATRO2(pixel_copy_increment, \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
489 double_pixel_copy_increment, \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
490 quatro_pixel_copy_increment, width) \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
491 { int n, w = width; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
492 if(w & 1) { \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
493 pixel_copy_increment; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
494 w--; \
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 if(w & 2) { \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
497 double_pixel_copy_increment; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
498 w -= 2; \
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 if ( w > 0 ) { \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
501 n = ( w + 7 ) / 8; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
502 switch( w & 4 ) { \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
503 case 0: do { quatro_pixel_copy_increment; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
504 case 4: quatro_pixel_copy_increment; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
505 } while ( --n > 0 ); \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
506 } \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
507 } \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
508 }
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
509
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
510 /* Use the 8-times version of the loop by default */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
511 #define DUFFS_LOOP(pixel_copy_increment, width) \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
512 DUFFS_LOOP8(pixel_copy_increment, width)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
513
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
514 #else
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
515
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
516 /* Don't use Duff's device to unroll loops */
689
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
517 #define DUFFS_LOOP_DOUBLE2(pixel_copy_increment, \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
518 double_pixel_copy_increment, width) \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
519 { int n = width; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
520 if( n & 1 ) { \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
521 pixel_copy_increment; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
522 n--; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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 n=n>>1; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
525 for(; n > 0; --n) { \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
526 double_pixel_copy_increment; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
527 } \
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
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
530 /* Don't use Duff's device to unroll loops */
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
531 #define DUFFS_LOOP_QUATRO2(pixel_copy_increment, \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
532 double_pixel_copy_increment, \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
533 quatro_pixel_copy_increment, width) \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
534 { int n = width; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
535 if(n & 1) { \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
536 pixel_copy_increment; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
537 n--; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
538 } \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
539 if(n & 2) { \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
540 double_pixel_copy_increment; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
541 n -= 2; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
542 } \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
543 n=n>>2; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
544 for(; n > 0; --n) { \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
545 quatro_pixel_copy_increment; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
546 } \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
547 }
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
548
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
549 /* Don't use Duff's device to unroll loops */
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
550 #define DUFFS_LOOP(pixel_copy_increment, width) \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
551 { int n; \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
552 for ( n=width; n > 0; --n ) { \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
553 pixel_copy_increment; \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
554 } \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
555 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
556 #define DUFFS_LOOP8(pixel_copy_increment, width) \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
557 DUFFS_LOOP(pixel_copy_increment, width)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
558 #define DUFFS_LOOP4(pixel_copy_increment, width) \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
559 DUFFS_LOOP(pixel_copy_increment, width)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
560
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
561 #endif /* USE_DUFFS_LOOP */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
562
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
563 /* Prevent Visual C++ 6.0 from printing out stupid warnings */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
564 #if defined(_MSC_VER) && (_MSC_VER >= 600)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
565 #pragma warning(disable: 4550)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
566 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
567
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
568 #endif /* _SDL_blit_h */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
569 /* vi: set ts=4 sw=4 expandtab: */