annotate src/video/SDL_blit.h @ 689:5bb080d35049

Date: Tue, 19 Aug 2003 17:57:00 +0200 From: Stephane Marchesin Subject: Re: [SDL] [patch] MMX alpha blit patches with MMX detection I think everything is correct now. I've done as much testing as I could, but some real-world testing wouldn't hurt, I think. The patch is here : http://icps.u-strasbg.fr/~marchesin/sdl_mmxblit.patch If you do byte-by-byte comparison of the output between C and MMX functions, you'll notice that the results for 555 and 565 RGB alpha blits aren't exactly the same. This is because MMX functions for 555 and 565 RGB have an higher accuracy. If you want the exact same behaviour that's possible by masking the three lower alpha bits in the MMX functions. Just ask ! I removed one MMX function because after I fixed it to match its C equivalent, it revealed to be slower than the C version on a PIII (although a bit faster on an Athlon XP). I've also added MMX and PIII replacements for SDL_memcpy. Those provide some speed up in testvidinfo -benchmark (at least for me, under linux & X11).
author Sam Lantinga <slouken@libsdl.org>
date Fri, 22 Aug 2003 05:51:19 +0000
parents 417f8709e648
children b8d311d90021
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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f6ffac90895c Updated copyright information for 2002
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 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 Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 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 Library 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 Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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
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23 #ifdef SAVE_RCSID
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24 static char rcsid =
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25 "@(#) $Id$";
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26 #endif
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27
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28 #ifndef _SDL_blit_h
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29 #define _SDL_blit_h
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30
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31 #include "SDL_endian.h"
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32
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33 /* The structure passed to the low level blit functions */
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34 typedef struct {
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35 Uint8 *s_pixels;
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36 int s_width;
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37 int s_height;
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38 int s_skip;
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39 Uint8 *d_pixels;
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40 int d_width;
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41 int d_height;
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42 int d_skip;
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43 void *aux_data;
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44 SDL_PixelFormat *src;
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45 Uint8 *table;
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46 SDL_PixelFormat *dst;
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47 } SDL_BlitInfo;
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48
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49 /* The type definition for the low level blit functions */
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50 typedef void (*SDL_loblit)(SDL_BlitInfo *info);
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51
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52 /* This is the private info structure for software accelerated blits */
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53 struct private_swaccel {
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54 SDL_loblit blit;
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55 void *aux_data;
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56 };
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57
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58 /* Blit mapping definition */
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59 typedef struct SDL_BlitMap {
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60 SDL_Surface *dst;
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61 int identity;
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62 Uint8 *table;
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63 SDL_blit hw_blit;
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64 SDL_blit sw_blit;
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65 struct private_hwaccel *hw_data;
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66 struct private_swaccel *sw_data;
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67
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68 /* the version count matches the destination; mismatch indicates
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69 an invalid mapping */
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70 unsigned int format_version;
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71 } SDL_BlitMap;
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72
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73
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74 /* Functions found in SDL_blit.c */
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75 extern int SDL_CalculateBlit(SDL_Surface *surface);
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76
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77 /* Functions found in SDL_blit_{0,1,N,A}.c */
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78 extern SDL_loblit SDL_CalculateBlit0(SDL_Surface *surface, int complex);
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79 extern SDL_loblit SDL_CalculateBlit1(SDL_Surface *surface, int complex);
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80 extern SDL_loblit SDL_CalculateBlitN(SDL_Surface *surface, int complex);
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81 extern SDL_loblit SDL_CalculateAlphaBlit(SDL_Surface *surface, int complex);
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82
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83 /*
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84 * Useful macros for blitting routines
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85 */
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86
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87 #define FORMAT_EQUAL(A, B) \
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88 ((A)->BitsPerPixel == (B)->BitsPerPixel \
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89 && ((A)->Rmask == (B)->Rmask) && ((A)->Amask == (B)->Amask))
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90
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91 /* Load pixel of the specified format from a buffer and get its R-G-B values */
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92 /* FIXME: rescale values to 0..255 here? */
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93 #define RGB_FROM_PIXEL(pixel, fmt, r, g, b) \
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94 { \
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95 r = (((pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss); \
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96 g = (((pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss); \
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97 b = (((pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss); \
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98 }
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99 #define RGB_FROM_RGB565(pixel, r, g, b) \
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100 { \
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101 r = (((pixel&0xF800)>>11)<<3); \
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102 g = (((pixel&0x07E0)>>5)<<2); \
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103 b = ((pixel&0x001F)<<3); \
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104 }
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105 #define RGB_FROM_RGB555(pixel, r, g, b) \
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106 { \
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107 r = (((pixel&0x7C00)>>10)<<3); \
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108 g = (((pixel&0x03E0)>>5)<<3); \
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109 b = ((pixel&0x001F)<<3); \
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110 }
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111 #define RGB_FROM_RGB888(pixel, r, g, b) \
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112 { \
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113 r = ((pixel&0xFF0000)>>16); \
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114 g = ((pixel&0xFF00)>>8); \
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115 b = (pixel&0xFF); \
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116 }
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117 #define RETRIEVE_RGB_PIXEL(buf, bpp, pixel) \
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118 do { \
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119 switch (bpp) { \
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120 case 2: \
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121 pixel = *((Uint16 *)(buf)); \
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122 break; \
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123 \
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124 case 3: { \
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125 Uint8 *B = (Uint8 *)(buf); \
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126 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
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127 pixel = B[0] + (B[1] << 8) + (B[2] << 16); \
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128 } else { \
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129 pixel = (B[0] << 16) + (B[1] << 8) + B[2]; \
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130 } \
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131 } \
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132 break; \
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133 \
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134 case 4: \
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135 pixel = *((Uint32 *)(buf)); \
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136 break; \
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137 \
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138 default: \
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139 pixel = 0; /* appease gcc */ \
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140 break; \
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141 } \
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142 } while(0)
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143
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144 #define DISEMBLE_RGB(buf, bpp, fmt, pixel, r, g, b) \
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145 do { \
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146 switch (bpp) { \
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147 case 2: \
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148 pixel = *((Uint16 *)(buf)); \
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149 break; \
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150 \
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151 case 3: { \
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152 Uint8 *B = (Uint8 *)buf; \
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153 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
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154 pixel = B[0] + (B[1] << 8) + (B[2] << 16); \
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155 } else { \
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156 pixel = (B[0] << 16) + (B[1] << 8) + B[2]; \
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157 } \
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158 } \
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159 break; \
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160 \
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161 case 4: \
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162 pixel = *((Uint32 *)(buf)); \
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163 break; \
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164 \
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165 default: \
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166 pixel = 0; /* prevent gcc from complaining */ \
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167 break; \
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168 } \
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169 RGB_FROM_PIXEL(pixel, fmt, r, g, b); \
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170 } while(0)
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171
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172 /* Assemble R-G-B values into a specified pixel format and store them */
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173 #define PIXEL_FROM_RGB(pixel, fmt, r, g, b) \
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174 { \
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175 pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \
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176 ((g>>fmt->Gloss)<<fmt->Gshift)| \
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177 ((b>>fmt->Bloss)<<fmt->Bshift); \
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178 }
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179 #define RGB565_FROM_RGB(pixel, r, g, b) \
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180 { \
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181 pixel = ((r>>3)<<11)|((g>>2)<<5)|(b>>3); \
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182 }
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183 #define RGB555_FROM_RGB(pixel, r, g, b) \
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184 { \
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185 pixel = ((r>>3)<<10)|((g>>3)<<5)|(b>>3); \
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186 }
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187 #define RGB888_FROM_RGB(pixel, r, g, b) \
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188 { \
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189 pixel = (r<<16)|(g<<8)|b; \
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190 }
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191 #define ASSEMBLE_RGB(buf, bpp, fmt, r, g, b) \
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192 { \
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193 switch (bpp) { \
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194 case 2: { \
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195 Uint16 pixel; \
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196 \
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197 PIXEL_FROM_RGB(pixel, fmt, r, g, b); \
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198 *((Uint16 *)(buf)) = pixel; \
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199 } \
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200 break; \
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201 \
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202 case 3: { \
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203 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
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204 *((buf)+fmt->Rshift/8) = r; \
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205 *((buf)+fmt->Gshift/8) = g; \
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206 *((buf)+fmt->Bshift/8) = b; \
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207 } else { \
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208 *((buf)+2-fmt->Rshift/8) = r; \
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209 *((buf)+2-fmt->Gshift/8) = g; \
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210 *((buf)+2-fmt->Bshift/8) = b; \
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211 } \
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212 } \
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213 break; \
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214 \
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215 case 4: { \
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216 Uint32 pixel; \
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217 \
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218 PIXEL_FROM_RGB(pixel, fmt, r, g, b); \
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219 *((Uint32 *)(buf)) = pixel; \
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220 } \
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221 break; \
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222 } \
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223 }
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224 #define ASSEMBLE_RGB_AMASK(buf, bpp, fmt, r, g, b, Amask) \
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225 { \
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226 switch (bpp) { \
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227 case 2: { \
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228 Uint16 *bufp; \
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229 Uint16 pixel; \
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230 \
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231 bufp = (Uint16 *)buf; \
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232 PIXEL_FROM_RGB(pixel, fmt, r, g, b); \
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233 *bufp = pixel | (*bufp & Amask); \
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234 } \
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235 break; \
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236 \
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237 case 3: { \
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238 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
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239 *((buf)+fmt->Rshift/8) = r; \
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240 *((buf)+fmt->Gshift/8) = g; \
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241 *((buf)+fmt->Bshift/8) = b; \
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242 } else { \
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243 *((buf)+2-fmt->Rshift/8) = r; \
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244 *((buf)+2-fmt->Gshift/8) = g; \
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245 *((buf)+2-fmt->Bshift/8) = b; \
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246 } \
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diff changeset
247 } \
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248 break; \
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249 \
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250 case 4: { \
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diff changeset
251 Uint32 *bufp; \
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diff changeset
252 Uint32 pixel; \
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253 \
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diff changeset
254 bufp = (Uint32 *)buf; \
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255 PIXEL_FROM_RGB(pixel, fmt, r, g, b); \
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256 *bufp = pixel | (*bufp & Amask); \
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parents:
diff changeset
257 } \
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diff changeset
258 break; \
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parents:
diff changeset
259 } \
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diff changeset
260 }
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diff changeset
261
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diff changeset
262 /* FIXME: Should we rescale alpha into 0..255 here? */
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parents:
diff changeset
263 #define RGBA_FROM_PIXEL(pixel, fmt, r, g, b, a) \
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diff changeset
264 { \
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265 r = ((pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss; \
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266 g = ((pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss; \
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267 b = ((pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss; \
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268 a = ((pixel&fmt->Amask)>>fmt->Ashift)<<fmt->Aloss; \
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parents:
diff changeset
269 }
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270 #define RGBA_FROM_8888(pixel, fmt, r, g, b, a) \
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diff changeset
271 { \
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diff changeset
272 r = (pixel&fmt->Rmask)>>fmt->Rshift; \
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273 g = (pixel&fmt->Gmask)>>fmt->Gshift; \
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diff changeset
274 b = (pixel&fmt->Bmask)>>fmt->Bshift; \
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diff changeset
275 a = (pixel&fmt->Amask)>>fmt->Ashift; \
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diff changeset
276 }
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diff changeset
277 #define RGBA_FROM_RGBA8888(pixel, r, g, b, a) \
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diff changeset
278 { \
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diff changeset
279 r = (pixel>>24); \
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280 g = ((pixel>>16)&0xFF); \
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281 b = ((pixel>>8)&0xFF); \
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diff changeset
282 a = (pixel&0xFF); \
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diff changeset
283 }
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diff changeset
284 #define RGBA_FROM_ARGB8888(pixel, r, g, b, a) \
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diff changeset
285 { \
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diff changeset
286 r = ((pixel>>16)&0xFF); \
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diff changeset
287 g = ((pixel>>8)&0xFF); \
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diff changeset
288 b = (pixel&0xFF); \
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diff changeset
289 a = (pixel>>24); \
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parents:
diff changeset
290 }
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diff changeset
291 #define RGBA_FROM_ABGR8888(pixel, r, g, b, a) \
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diff changeset
292 { \
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diff changeset
293 r = (pixel&0xFF); \
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diff changeset
294 g = ((pixel>>8)&0xFF); \
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diff changeset
295 b = ((pixel>>16)&0xFF); \
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diff changeset
296 a = (pixel>>24); \
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diff changeset
297 }
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diff changeset
298 #define DISEMBLE_RGBA(buf, bpp, fmt, pixel, r, g, b, a) \
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parents:
diff changeset
299 do { \
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parents:
diff changeset
300 switch (bpp) { \
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diff changeset
301 case 2: \
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diff changeset
302 pixel = *((Uint16 *)(buf)); \
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parents:
diff changeset
303 break; \
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diff changeset
304 \
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diff changeset
305 case 3: {/* FIXME: broken code (no alpha) */ \
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parents:
diff changeset
306 Uint8 *b = (Uint8 *)buf; \
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diff changeset
307 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
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diff changeset
308 pixel = b[0] + (b[1] << 8) + (b[2] << 16); \
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diff changeset
309 } else { \
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diff changeset
310 pixel = (b[0] << 16) + (b[1] << 8) + b[2]; \
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parents:
diff changeset
311 } \
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parents:
diff changeset
312 } \
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parents:
diff changeset
313 break; \
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parents:
diff changeset
314 \
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diff changeset
315 case 4: \
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parents:
diff changeset
316 pixel = *((Uint32 *)(buf)); \
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parents:
diff changeset
317 break; \
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parents:
diff changeset
318 \
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parents:
diff changeset
319 default: \
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parents:
diff changeset
320 pixel = 0; /* stop gcc complaints */ \
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parents:
diff changeset
321 break; \
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parents:
diff changeset
322 } \
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diff changeset
323 RGBA_FROM_PIXEL(pixel, fmt, r, g, b, a); \
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parents:
diff changeset
324 pixel &= ~fmt->Amask; \
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parents:
diff changeset
325 } while(0)
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parents:
diff changeset
326
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diff changeset
327 /* FIXME: this isn't correct, especially for Alpha (maximum != 255) */
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diff changeset
328 #define PIXEL_FROM_RGBA(pixel, fmt, r, g, b, a) \
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329 { \
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330 pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \
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331 ((g>>fmt->Gloss)<<fmt->Gshift)| \
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332 ((b>>fmt->Bloss)<<fmt->Bshift)| \
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333 ((a>>fmt->Aloss)<<fmt->Ashift); \
0
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334 }
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335 #define ASSEMBLE_RGBA(buf, bpp, fmt, r, g, b, a) \
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336 { \
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337 switch (bpp) { \
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338 case 2: { \
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339 Uint16 pixel; \
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340 \
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341 PIXEL_FROM_RGBA(pixel, fmt, r, g, b, a); \
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342 *((Uint16 *)(buf)) = pixel; \
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343 } \
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344 break; \
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345 \
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346 case 3: { /* FIXME: broken code (no alpha) */ \
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347 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
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348 *((buf)+fmt->Rshift/8) = r; \
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349 *((buf)+fmt->Gshift/8) = g; \
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350 *((buf)+fmt->Bshift/8) = b; \
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351 } else { \
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352 *((buf)+2-fmt->Rshift/8) = r; \
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353 *((buf)+2-fmt->Gshift/8) = g; \
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354 *((buf)+2-fmt->Bshift/8) = b; \
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355 } \
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356 } \
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357 break; \
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358 \
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359 case 4: { \
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360 Uint32 pixel; \
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361 \
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362 PIXEL_FROM_RGBA(pixel, fmt, r, g, b, a); \
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363 *((Uint32 *)(buf)) = pixel; \
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364 } \
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365 break; \
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366 } \
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367 }
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368
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369 /* Blend the RGB values of two pixels based on a source alpha value */
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370 #define ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB) \
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371 do { \
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372 dR = (((sR-dR)*(A))>>8)+dR; \
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373 dG = (((sG-dG)*(A))>>8)+dG; \
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374 dB = (((sB-dB)*(A))>>8)+dB; \
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375 } while(0)
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376
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377 /* This is a very useful loop for optimizing blitters */
553
417f8709e648 There's a bug in the VC7 optimizer relating to the duff loop optimization
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378 #if defined(_MSC_VER) && (_MSC_VER == 1300)
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379 /* There's a bug in the Visual C++ 7 optimizer when compiling this code */
417f8709e648 There's a bug in the VC7 optimizer relating to the duff loop optimization
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diff changeset
380 #else
0
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381 #define USE_DUFFS_LOOP
553
417f8709e648 There's a bug in the VC7 optimizer relating to the duff loop optimization
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diff changeset
382 #endif
0
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diff changeset
383 #ifdef USE_DUFFS_LOOP
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384
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385 /* 8-times unrolled loop */
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parents:
diff changeset
386 #define DUFFS_LOOP8(pixel_copy_increment, width) \
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diff changeset
387 { int n = (width+7)/8; \
91
e85e03f195b4 From: "Markus F.X.J. Oberhumer"
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parents: 0
diff changeset
388 switch (width & 7) { \
0
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389 case 0: do { pixel_copy_increment; \
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diff changeset
390 case 7: pixel_copy_increment; \
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diff changeset
391 case 6: pixel_copy_increment; \
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diff changeset
392 case 5: pixel_copy_increment; \
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diff changeset
393 case 4: pixel_copy_increment; \
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diff changeset
394 case 3: pixel_copy_increment; \
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diff changeset
395 case 2: pixel_copy_increment; \
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parents:
diff changeset
396 case 1: pixel_copy_increment; \
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parents:
diff changeset
397 } while ( --n > 0 ); \
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parents:
diff changeset
398 } \
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parents:
diff changeset
399 }
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diff changeset
400
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parents:
diff changeset
401 /* 4-times unrolled loop */
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parents:
diff changeset
402 #define DUFFS_LOOP4(pixel_copy_increment, width) \
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diff changeset
403 { int n = (width+3)/4; \
91
e85e03f195b4 From: "Markus F.X.J. Oberhumer"
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
404 switch (width & 3) { \
0
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parents:
diff changeset
405 case 0: do { pixel_copy_increment; \
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parents:
diff changeset
406 case 3: pixel_copy_increment; \
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parents:
diff changeset
407 case 2: pixel_copy_increment; \
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parents:
diff changeset
408 case 1: pixel_copy_increment; \
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parents:
diff changeset
409 } while ( --n > 0 ); \
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parents:
diff changeset
410 } \
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parents:
diff changeset
411 }
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diff changeset
412
689
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parents: 553
diff changeset
413 /* 2 - times unrolled loop */
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diff changeset
414 #define DUFFS_LOOP_DOUBLE2(pixel_copy_increment, \
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diff changeset
415 double_pixel_copy_increment, width) \
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diff changeset
416 { int n, w = width; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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diff changeset
417 if( w & 1 ) { \
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diff changeset
418 pixel_copy_increment; \
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diff changeset
419 w--; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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diff changeset
420 } \
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diff changeset
421 if ( w > 0 ) { \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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diff changeset
422 n = ( w + 2) / 4; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
423 switch( w & 2 ) { \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
424 case 0: do { double_pixel_copy_increment; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
425 case 2: double_pixel_copy_increment; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
426 } while ( --n > 0 ); \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
427 } \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
428 } \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
429 }
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
430
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
431 /* 2 - times unrolled loop 4 pixels */
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diff changeset
432 #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
433 double_pixel_copy_increment, \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
434 quatro_pixel_copy_increment, width) \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
435 { int n, w = width; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
436 if(w & 1) { \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
437 pixel_copy_increment; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
438 w--; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
439 } \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
440 if(w & 2) { \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 553
diff changeset
441 double_pixel_copy_increment; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
442 w -= 2; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
443 } \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
444 if ( w > 0 ) { \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
445 n = ( w + 7 ) / 8; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
446 switch( w & 4 ) { \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
447 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
448 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
449 } while ( --n > 0 ); \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
450 } \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
451 } \
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
0
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parents:
diff changeset
454 /* Use the 8-times version of the loop by default */
74212992fb08 Initial revision
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parents:
diff changeset
455 #define DUFFS_LOOP(pixel_copy_increment, width) \
74212992fb08 Initial revision
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parents:
diff changeset
456 DUFFS_LOOP8(pixel_copy_increment, width)
74212992fb08 Initial revision
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parents:
diff changeset
457
74212992fb08 Initial revision
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parents:
diff changeset
458 #else
74212992fb08 Initial revision
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parents:
diff changeset
459
74212992fb08 Initial revision
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parents:
diff changeset
460 /* Don't use Duff's device to unroll loops */
689
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parents: 553
diff changeset
461 #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
462 double_pixel_copy_increment, width) \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
463 { int n = width; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
464 if( n & 1 ) { \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
465 pixel_copy_increment; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
466 n--; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
467 } \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
468 n=n>>1; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
469 for(; n > 0; --n) { \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
470 double_pixel_copy_increment; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
471 } \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
472 }
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
473
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
474 /* 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
475 #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
476 double_pixel_copy_increment, \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
477 quatro_pixel_copy_increment, width) \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
478 { int n = width; \
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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diff changeset
479 if(n & 1) { \
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480 pixel_copy_increment; \
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481 n--; \
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482 } \
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483 if(n & 2) { \
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484 double_pixel_copy_increment; \
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485 n -= 2; \
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486 } \
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487 n=n>>2; \
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488 for(; n > 0; --n) { \
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489 quatro_pixel_copy_increment; \
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490 } \
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491 }
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492
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493 /* Don't use Duff's device to unroll loops */
0
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494 #define DUFFS_LOOP(pixel_copy_increment, width) \
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495 { int n; \
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496 for ( n=width; n > 0; --n ) { \
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497 pixel_copy_increment; \
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498 } \
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499 }
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500 #define DUFFS_LOOP8(pixel_copy_increment, width) \
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501 DUFFS_LOOP(pixel_copy_increment, width)
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502 #define DUFFS_LOOP4(pixel_copy_increment, width) \
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503 DUFFS_LOOP(pixel_copy_increment, width)
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504
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505 #endif /* USE_DUFFS_LOOP */
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506
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507 /* Prevent Visual C++ 6.0 from printing out stupid warnings */
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508 #if defined(_MSC_VER) && (_MSC_VER >= 600)
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509 #pragma warning(disable: 4550)
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510 #endif
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511
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512 #endif /* _SDL_blit_h */