annotate src/video/SDL_blit.h @ 1668:4da1ee79c9af SDL-1.3

more tweaking indent options
author Sam Lantinga <slouken@libsdl.org>
date Mon, 29 May 2006 04:04:35 +0000
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children 8e754b82cecc
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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 #include "SDL_endian.h"
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28
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29 /* The structure passed to the low level blit functions */
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30 typedef struct
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31 {
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32 Uint8 *s_pixels;
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33 int s_width;
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34 int s_height;
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35 int s_skip;
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36 Uint8 *d_pixels;
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37 int d_width;
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38 int d_height;
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39 int d_skip;
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40 void *aux_data;
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41 SDL_PixelFormat *src;
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42 Uint8 *table;
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43 SDL_PixelFormat *dst;
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44 } SDL_BlitInfo;
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45
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46 /* The type definition for the low level blit functions */
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47 typedef void (*SDL_loblit) (SDL_BlitInfo * info);
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48
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49 /* This is the private info structure for software accelerated blits */
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50 struct private_swaccel
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51 {
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52 SDL_loblit blit;
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53 void *aux_data;
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54 };
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55
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56 /* Blit mapping definition */
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57 typedef struct SDL_BlitMap
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58 {
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59 SDL_Surface *dst;
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60 int identity;
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61 Uint8 *table;
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62 SDL_blit hw_blit;
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63 SDL_blit sw_blit;
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64 struct private_hwaccel *hw_data;
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65 struct private_swaccel *sw_data;
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66
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67 /* the version count matches the destination; mismatch indicates
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68 an invalid mapping */
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69 unsigned int format_version;
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70 } SDL_BlitMap;
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71
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72
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73 /* Functions found in SDL_blit.c */
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74 extern int SDL_CalculateBlit(SDL_Surface * surface);
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75
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76 /* Functions found in SDL_blit_{0,1,N,A}.c */
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77 extern SDL_loblit SDL_CalculateBlit0(SDL_Surface * surface, int complex);
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78 extern SDL_loblit SDL_CalculateBlit1(SDL_Surface * surface, int complex);
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79 extern SDL_loblit SDL_CalculateBlitN(SDL_Surface * surface, int complex);
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80 extern SDL_loblit SDL_CalculateAlphaBlit(SDL_Surface * surface, int complex);
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81
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82 /*
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83 * Useful macros for blitting routines
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84 */
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85
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86 #define FORMAT_EQUAL(A, B) \
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87 ((A)->BitsPerPixel == (B)->BitsPerPixel \
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88 && ((A)->Rmask == (B)->Rmask) && ((A)->Amask == (B)->Amask))
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89
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90 /* Load pixel of the specified format from a buffer and get its R-G-B values */
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91 /* FIXME: rescale values to 0..255 here? */
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92 #define RGB_FROM_PIXEL(Pixel, fmt, r, g, b) \
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93 { \
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94 r = (((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss); \
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95 g = (((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss); \
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96 b = (((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss); \
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97 }
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98 #define RGB_FROM_RGB565(Pixel, r, g, b) \
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99 { \
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100 r = (((Pixel&0xF800)>>11)<<3); \
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101 g = (((Pixel&0x07E0)>>5)<<2); \
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102 b = ((Pixel&0x001F)<<3); \
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103 }
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104 #define RGB_FROM_RGB555(Pixel, r, g, b) \
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105 { \
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106 r = (((Pixel&0x7C00)>>10)<<3); \
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107 g = (((Pixel&0x03E0)>>5)<<3); \
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108 b = ((Pixel&0x001F)<<3); \
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109 }
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110 #define RGB_FROM_RGB888(Pixel, r, g, b) \
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111 { \
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112 r = ((Pixel&0xFF0000)>>16); \
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113 g = ((Pixel&0xFF00)>>8); \
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114 b = (Pixel&0xFF); \
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115 }
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116 #define RETRIEVE_RGB_PIXEL(buf, bpp, Pixel) \
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117 do { \
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118 switch (bpp) { \
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119 case 2: \
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120 Pixel = *((Uint16 *)(buf)); \
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121 break; \
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122 \
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123 case 3: { \
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124 Uint8 *B = (Uint8 *)(buf); \
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125 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
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126 Pixel = B[0] + (B[1] << 8) + (B[2] << 16); \
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127 } else { \
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128 Pixel = (B[0] << 16) + (B[1] << 8) + B[2]; \
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129 } \
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130 } \
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131 break; \
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132 \
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133 case 4: \
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134 Pixel = *((Uint32 *)(buf)); \
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135 break; \
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136 \
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137 default: \
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138 Pixel = 0; /* appease gcc */ \
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139 break; \
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140 } \
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141 } while(0)
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142
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143 #define DISEMBLE_RGB(buf, bpp, fmt, Pixel, r, g, b) \
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144 do { \
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145 switch (bpp) { \
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146 case 2: \
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147 Pixel = *((Uint16 *)(buf)); \
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148 break; \
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149 \
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150 case 3: { \
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151 Uint8 *B = (Uint8 *)buf; \
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152 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
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153 Pixel = B[0] + (B[1] << 8) + (B[2] << 16); \
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154 } else { \
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155 Pixel = (B[0] << 16) + (B[1] << 8) + B[2]; \
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156 } \
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157 } \
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158 break; \
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159 \
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160 case 4: \
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161 Pixel = *((Uint32 *)(buf)); \
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162 break; \
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163 \
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164 default: \
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165 Pixel = 0; /* prevent gcc from complaining */ \
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166 break; \
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167 } \
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168 RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \
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169 } while(0)
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170
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171 /* Assemble R-G-B values into a specified pixel format and store them */
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172 #define PIXEL_FROM_RGB(Pixel, fmt, r, g, b) \
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173 { \
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174 Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \
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175 ((g>>fmt->Gloss)<<fmt->Gshift)| \
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176 ((b>>fmt->Bloss)<<fmt->Bshift); \
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177 }
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178 #define RGB565_FROM_RGB(Pixel, r, g, b) \
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179 { \
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180 Pixel = ((r>>3)<<11)|((g>>2)<<5)|(b>>3); \
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181 }
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182 #define RGB555_FROM_RGB(Pixel, r, g, b) \
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183 { \
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184 Pixel = ((r>>3)<<10)|((g>>3)<<5)|(b>>3); \
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185 }
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186 #define RGB888_FROM_RGB(Pixel, r, g, b) \
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187 { \
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188 Pixel = (r<<16)|(g<<8)|b; \
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189 }
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190 #define ASSEMBLE_RGB(buf, bpp, fmt, r, g, b) \
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191 { \
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192 switch (bpp) { \
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193 case 2: { \
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194 Uint16 Pixel; \
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195 \
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196 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \
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197 *((Uint16 *)(buf)) = Pixel; \
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198 } \
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199 break; \
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200 \
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201 case 3: { \
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202 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
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203 *((buf)+fmt->Rshift/8) = r; \
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204 *((buf)+fmt->Gshift/8) = g; \
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205 *((buf)+fmt->Bshift/8) = b; \
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206 } else { \
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207 *((buf)+2-fmt->Rshift/8) = r; \
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208 *((buf)+2-fmt->Gshift/8) = g; \
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209 *((buf)+2-fmt->Bshift/8) = b; \
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210 } \
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211 } \
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212 break; \
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213 \
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214 case 4: { \
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215 Uint32 Pixel; \
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216 \
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217 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \
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218 *((Uint32 *)(buf)) = Pixel; \
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219 } \
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220 break; \
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221 } \
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222 }
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223 #define ASSEMBLE_RGB_AMASK(buf, bpp, fmt, r, g, b, Amask) \
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224 { \
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225 switch (bpp) { \
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226 case 2: { \
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227 Uint16 *bufp; \
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228 Uint16 Pixel; \
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229 \
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230 bufp = (Uint16 *)buf; \
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231 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \
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232 *bufp = Pixel | (*bufp & Amask); \
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233 } \
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234 break; \
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235 \
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236 case 3: { \
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237 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
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238 *((buf)+fmt->Rshift/8) = r; \
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239 *((buf)+fmt->Gshift/8) = g; \
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240 *((buf)+fmt->Bshift/8) = b; \
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241 } else { \
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242 *((buf)+2-fmt->Rshift/8) = r; \
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243 *((buf)+2-fmt->Gshift/8) = g; \
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244 *((buf)+2-fmt->Bshift/8) = b; \
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245 } \
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246 } \
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247 break; \
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248 \
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249 case 4: { \
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250 Uint32 *bufp; \
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251 Uint32 Pixel; \
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252 \
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253 bufp = (Uint32 *)buf; \
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254 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \
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255 *bufp = Pixel | (*bufp & Amask); \
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256 } \
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257 break; \
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258 } \
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259 }
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260
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261 /* FIXME: Should we rescale alpha into 0..255 here? */
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262 #define RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a) \
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263 { \
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264 r = ((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss; \
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265 g = ((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss; \
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266 b = ((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss; \
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267 a = ((Pixel&fmt->Amask)>>fmt->Ashift)<<fmt->Aloss; \
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268 }
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269 #define RGBA_FROM_8888(Pixel, fmt, r, g, b, a) \
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270 { \
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271 r = (Pixel&fmt->Rmask)>>fmt->Rshift; \
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272 g = (Pixel&fmt->Gmask)>>fmt->Gshift; \
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273 b = (Pixel&fmt->Bmask)>>fmt->Bshift; \
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274 a = (Pixel&fmt->Amask)>>fmt->Ashift; \
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275 }
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276 #define RGBA_FROM_RGBA8888(Pixel, r, g, b, a) \
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277 { \
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278 r = (Pixel>>24); \
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279 g = ((Pixel>>16)&0xFF); \
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280 b = ((Pixel>>8)&0xFF); \
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281 a = (Pixel&0xFF); \
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282 }
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283 #define RGBA_FROM_ARGB8888(Pixel, r, g, b, a) \
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284 { \
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285 r = ((Pixel>>16)&0xFF); \
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286 g = ((Pixel>>8)&0xFF); \
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287 b = (Pixel&0xFF); \
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288 a = (Pixel>>24); \
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289 }
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290 #define RGBA_FROM_ABGR8888(Pixel, r, g, b, a) \
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291 { \
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292 r = (Pixel&0xFF); \
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293 g = ((Pixel>>8)&0xFF); \
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294 b = ((Pixel>>16)&0xFF); \
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295 a = (Pixel>>24); \
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296 }
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297 #define DISEMBLE_RGBA(buf, bpp, fmt, Pixel, r, g, b, a) \
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298 do { \
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299 switch (bpp) { \
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300 case 2: \
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301 Pixel = *((Uint16 *)(buf)); \
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302 break; \
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303 \
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304 case 3: {/* FIXME: broken code (no alpha) */ \
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305 Uint8 *b = (Uint8 *)buf; \
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306 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
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307 Pixel = b[0] + (b[1] << 8) + (b[2] << 16); \
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308 } else { \
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309 Pixel = (b[0] << 16) + (b[1] << 8) + b[2]; \
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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 Pixel = *((Uint32 *)(buf)); \
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316 break; \
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317 \
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318 default: \
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319 Pixel = 0; /* stop gcc complaints */ \
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320 break; \
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321 } \
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322 RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a); \
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323 Pixel &= ~fmt->Amask; \
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324 } while(0)
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325
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326 /* FIXME: this isn't correct, especially for Alpha (maximum != 255) */
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327 #define PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a) \
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328 { \
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329 Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \
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330 ((g>>fmt->Gloss)<<fmt->Gshift)| \
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331 ((b>>fmt->Bloss)<<fmt->Bshift)| \
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332 ((a>>fmt->Aloss)<<fmt->Ashift); \
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333 }
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334 #define ASSEMBLE_RGBA(buf, bpp, fmt, r, g, b, a) \
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335 { \
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336 switch (bpp) { \
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337 case 2: { \
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338 Uint16 Pixel; \
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339 \
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340 PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a); \
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341 *((Uint16 *)(buf)) = Pixel; \
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342 } \
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343 break; \
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344 \
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345 case 3: { /* FIXME: broken code (no alpha) */ \
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346 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
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347 *((buf)+fmt->Rshift/8) = r; \
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348 *((buf)+fmt->Gshift/8) = g; \
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349 *((buf)+fmt->Bshift/8) = b; \
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350 } else { \
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351 *((buf)+2-fmt->Rshift/8) = r; \
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352 *((buf)+2-fmt->Gshift/8) = g; \
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353 *((buf)+2-fmt->Bshift/8) = b; \
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354 } \
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355 } \
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356 break; \
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357 \
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358 case 4: { \
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359 Uint32 Pixel; \
0
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360 \
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361 PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a); \
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362 *((Uint32 *)(buf)) = Pixel; \
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363 } \
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364 break; \
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365 } \
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366 }
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367
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368 /* Blend the RGB values of two Pixels based on a source alpha value */
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369 #define ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB) \
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370 do { \
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371 dR = (((sR-dR)*(A))>>8)+dR; \
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372 dG = (((sG-dG)*(A))>>8)+dG; \
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373 dB = (((sB-dB)*(A))>>8)+dB; \
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374 } while(0)
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375
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376 /* Blend the RGB values of two Pixels based on a source alpha value */
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377 #define ACCURATE_ALPHA_BLEND(sR, sG, sB, sA, dR, dG, dB) \
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378 do { \
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379 unsigned tR, tG, tB, tA; \
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380 tA = 255 - sA; \
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381 tR = 1 + (sR * sA) + (dR * tA); \
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382 dR = (tR + (tR >> 8)) >> 8; \
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383 tG = 1 + (sG * sA) + (dG * tA); \
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384 dG = (tG + (tG >> 8)) >> 8; \
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385 tB = 1 + (sB * sA) + (dB * tA); \
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386 dB = (tB + (tB >> 8)) >> 8; \
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387 } while(0)
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388
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389
0
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390 /* This is a very useful loop for optimizing blitters */
553
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391 #if defined(_MSC_VER) && (_MSC_VER == 1300)
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392 /* There's a bug in the Visual C++ 7 optimizer when compiling this code */
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393 #else
0
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394 #define USE_DUFFS_LOOP
553
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395 #endif
0
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396 #ifdef USE_DUFFS_LOOP
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397
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398 /* 8-times unrolled loop */
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399 #define DUFFS_LOOP8(pixel_copy_increment, width) \
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400 { int n = (width+7)/8; \
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401 switch (width & 7) { \
0
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402 case 0: do { pixel_copy_increment; \
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403 case 7: pixel_copy_increment; \
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404 case 6: pixel_copy_increment; \
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405 case 5: pixel_copy_increment; \
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406 case 4: pixel_copy_increment; \
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407 case 3: pixel_copy_increment; \
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408 case 2: pixel_copy_increment; \
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409 case 1: pixel_copy_increment; \
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410 } while ( --n > 0 ); \
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diff changeset
411 } \
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diff changeset
412 }
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diff changeset
413
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414 /* 4-times unrolled loop */
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415 #define DUFFS_LOOP4(pixel_copy_increment, width) \
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416 { int n = (width+3)/4; \
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417 switch (width & 3) { \
0
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418 case 0: do { pixel_copy_increment; \
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419 case 3: pixel_copy_increment; \
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420 case 2: pixel_copy_increment; \
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421 case 1: pixel_copy_increment; \
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422 } while ( --n > 0 ); \
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diff changeset
423 } \
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424 }
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425
689
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diff changeset
426 /* 2 - times unrolled loop */
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diff changeset
427 #define DUFFS_LOOP_DOUBLE2(pixel_copy_increment, \
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diff changeset
428 double_pixel_copy_increment, width) \
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diff changeset
429 { int n, w = width; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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diff changeset
430 if( w & 1 ) { \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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diff changeset
431 pixel_copy_increment; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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diff changeset
432 w--; \
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diff changeset
433 } \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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diff changeset
434 if ( w > 0 ) { \
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Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
435 n = ( w + 2) / 4; \
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Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
436 switch( w & 2 ) { \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
437 case 0: do { double_pixel_copy_increment; \
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parents: 553
diff changeset
438 case 2: double_pixel_copy_increment; \
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Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
439 } while ( --n > 0 ); \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
440 } \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
441 } \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
442 }
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Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
443
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Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
444 /* 2 - times unrolled loop 4 pixels */
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Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
445 #define DUFFS_LOOP_QUATRO2(pixel_copy_increment, \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
446 double_pixel_copy_increment, \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
447 quatro_pixel_copy_increment, width) \
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Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
448 { int n, w = width; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
449 if(w & 1) { \
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Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
450 pixel_copy_increment; \
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Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
451 w--; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
452 } \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
453 if(w & 2) { \
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parents: 553
diff changeset
454 double_pixel_copy_increment; \
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Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
455 w -= 2; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
456 } \
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Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
457 if ( w > 0 ) { \
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Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
458 n = ( w + 7 ) / 8; \
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Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
459 switch( w & 4 ) { \
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parents: 553
diff changeset
460 case 0: do { quatro_pixel_copy_increment; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
461 case 4: quatro_pixel_copy_increment; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
462 } while ( --n > 0 ); \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
463 } \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
464 } \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
465 }
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parents: 553
diff changeset
466
0
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parents:
diff changeset
467 /* Use the 8-times version of the loop by default */
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parents:
diff changeset
468 #define DUFFS_LOOP(pixel_copy_increment, width) \
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parents:
diff changeset
469 DUFFS_LOOP8(pixel_copy_increment, width)
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parents:
diff changeset
470
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parents:
diff changeset
471 #else
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parents:
diff changeset
472
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parents:
diff changeset
473 /* Don't use Duff's device to unroll loops */
689
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
474 #define DUFFS_LOOP_DOUBLE2(pixel_copy_increment, \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
475 double_pixel_copy_increment, width) \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
476 { int n = width; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
477 if( n & 1 ) { \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
478 pixel_copy_increment; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
479 n--; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
480 } \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
481 n=n>>1; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
482 for(; n > 0; --n) { \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
483 double_pixel_copy_increment; \
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
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parents: 553
diff changeset
487 /* Don't use Duff's device to unroll loops */
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
488 #define DUFFS_LOOP_QUATRO2(pixel_copy_increment, \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
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 = width; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
492 if(n & 1) { \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
493 pixel_copy_increment; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
494 n--; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
495 } \
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parents: 553
diff changeset
496 if(n & 2) { \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
497 double_pixel_copy_increment; \
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Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
498 n -= 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
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parents: 553
diff changeset
500 n=n>>2; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
501 for(; n > 0; --n) { \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
502 quatro_pixel_copy_increment; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
503 } \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
504 }
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
505
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
506 /* Don't use Duff's device to unroll loops */
0
74212992fb08 Initial revision
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parents:
diff changeset
507 #define DUFFS_LOOP(pixel_copy_increment, width) \
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parents:
diff changeset
508 { int n; \
74212992fb08 Initial revision
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parents:
diff changeset
509 for ( n=width; n > 0; --n ) { \
74212992fb08 Initial revision
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parents:
diff changeset
510 pixel_copy_increment; \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
511 } \
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
512 }
74212992fb08 Initial revision
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parents:
diff changeset
513 #define DUFFS_LOOP8(pixel_copy_increment, width) \
74212992fb08 Initial revision
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parents:
diff changeset
514 DUFFS_LOOP(pixel_copy_increment, width)
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
515 #define DUFFS_LOOP4(pixel_copy_increment, width) \
74212992fb08 Initial revision
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parents:
diff changeset
516 DUFFS_LOOP(pixel_copy_increment, width)
74212992fb08 Initial revision
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parents:
diff changeset
517
74212992fb08 Initial revision
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parents:
diff changeset
518 #endif /* USE_DUFFS_LOOP */
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parents:
diff changeset
519
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parents:
diff changeset
520 /* Prevent Visual C++ 6.0 from printing out stupid warnings */
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parents:
diff changeset
521 #if defined(_MSC_VER) && (_MSC_VER >= 600)
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parents:
diff changeset
522 #pragma warning(disable: 4550)
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
523 #endif
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
524
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
525 #endif /* _SDL_blit_h */
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
526 /* vi: set ts=4 sw=4 expandtab: */