annotate src/video/SDL_blit.c @ 720:f90d80d68071

N Sep 17 8791 Sam Lantinga Re: tks source released Date: Sun, 07 Sep 2003 02:51:58 +0200 From: Stephane Marchesin Subject: [SDL] Two little patches Compiling SDL with a recent gcc (gcc 3.3.1, 3.3 doesn't have this behaviour) gives some nasty warnings : SDL_blit_A.c: In function `BlitRGBtoRGBSurfaceAlpha128MMX': SDL_blit_A.c:223: warning: integer constant is too large for "long" type SDL_blit_A.c:225: warning: integer constant is too large for "long" type SDL_blit_A.c:227: warning: integer constant is too large for "long" type [...] The first attached patch (longlongfix.patch) tells gcc to really treat those constants as unsigned long long and not long. The second patch (nasinclude.patch) fixes an include problem I had while compiling nas audio : when the <audio/audiolib.h> file lies in /usr/X11R6/include, a -I/usr/X11R6/include option is needed or the file isn't found.
author Sam Lantinga <slouken@libsdl.org>
date Sun, 21 Sep 2003 18:32:04 +0000
parents 8468fc0504f3
children 22dbf364c017
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 #include <stdio.h>
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29 #include <stdlib.h>
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30 #include <string.h>
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31
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32 #include "SDL_error.h"
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33 #include "SDL_video.h"
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34 #include "SDL_sysvideo.h"
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35 #include "SDL_blit.h"
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36 #include "SDL_RLEaccel_c.h"
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37 #include "SDL_pixels_c.h"
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38 #include "SDL_memops.h"
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39
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40 #if defined(i386) && defined(__GNUC__) && defined(USE_ASMBLIT)
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41 #include "mmx.h"
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42 /* Function to check the CPU flags */
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43 #define MMX_CPU 0x800000
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44 #define SSE_CPU 0x2000000
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45 #define CPU_Flags() Hermes_X86_CPU()
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46 #define X86_ASSEMBLER
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47 #define HermesConverterInterface void
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48 #define HermesClearInterface void
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49 #define STACKCALL
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50 #include "HeadX86.h"
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51 #endif
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52
0
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53 /* The general purpose software blit routine */
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54 static int SDL_SoftBlit(SDL_Surface *src, SDL_Rect *srcrect,
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55 SDL_Surface *dst, SDL_Rect *dstrect)
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56 {
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57 int okay;
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58 int src_locked;
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59 int dst_locked;
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60
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61 /* Everything is okay at the beginning... */
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62 okay = 1;
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63
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64 /* Lock the destination if it's in hardware */
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65 dst_locked = 0;
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66 if ( SDL_MUSTLOCK(dst) ) {
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67 if ( SDL_LockSurface(dst) < 0 ) {
0
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68 okay = 0;
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69 } else {
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70 dst_locked = 1;
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71 }
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72 }
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73 /* Lock the source if it's in hardware */
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74 src_locked = 0;
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75 if ( SDL_MUSTLOCK(src) ) {
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76 if ( SDL_LockSurface(src) < 0 ) {
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77 okay = 0;
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78 } else {
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79 src_locked = 1;
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80 }
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81 }
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82
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83 /* Set up source and destination buffer pointers, and BLIT! */
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84 if ( okay && srcrect->w && srcrect->h ) {
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85 SDL_BlitInfo info;
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86 SDL_loblit RunBlit;
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87
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88 /* Set up the blit information */
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89 info.s_pixels = (Uint8 *)src->pixels +
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90 (Uint16)srcrect->y*src->pitch +
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91 (Uint16)srcrect->x*src->format->BytesPerPixel;
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92 info.s_width = srcrect->w;
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93 info.s_height = srcrect->h;
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94 info.s_skip=src->pitch-info.s_width*src->format->BytesPerPixel;
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95 info.d_pixels = (Uint8 *)dst->pixels +
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96 (Uint16)dstrect->y*dst->pitch +
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97 (Uint16)dstrect->x*dst->format->BytesPerPixel;
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98 info.d_width = dstrect->w;
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99 info.d_height = dstrect->h;
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100 info.d_skip=dst->pitch-info.d_width*dst->format->BytesPerPixel;
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101 info.aux_data = src->map->sw_data->aux_data;
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102 info.src = src->format;
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103 info.table = src->map->table;
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104 info.dst = dst->format;
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105 RunBlit = src->map->sw_data->blit;
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106
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107 /* Run the actual software blit */
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108 RunBlit(&info);
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109 }
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110
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111 /* We need to unlock the surfaces if they're locked */
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112 if ( dst_locked ) {
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113 SDL_UnlockSurface(dst);
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114 }
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115 if ( src_locked ) {
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116 SDL_UnlockSurface(src);
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117 }
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118 /* Blit is done! */
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119 return(okay ? 0 : -1);
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120 }
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121
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122 #if defined(i386) && defined(__GNUC__) && defined(USE_ASMBLIT)
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123 void SDL_memcpyMMX(char* to,char* from,int len)
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124 {
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125 int i;
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126
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127 for(i=0; i<len/8; i++) {
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128 __asm__ __volatile__ (
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129 " movq (%0), %%mm0\n"
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130 " movq %%mm0, (%1)\n"
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131 : : "r" (from), "r" (to) : "memory");
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132 from+=8;
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133 to+=8;
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134 }
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135 if (len&7)
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136 SDL_memcpy(to, from, len&7);
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137 }
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138
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139 void SDL_memcpySSE(char* to,char* from,int len)
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140 {
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141 int i;
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142
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143 __asm__ __volatile__ (
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144 " prefetchnta (%0)\n"
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145 " prefetchnta 64(%0)\n"
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146 " prefetchnta 128(%0)\n"
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147 " prefetchnta 192(%0)\n"
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148 : : "r" (from) );
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149
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150 for(i=0; i<len/8; i++) {
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151 __asm__ __volatile__ (
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152 " prefetchnta 256(%0)\n"
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diff changeset
153 " movq (%0), %%mm0\n"
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diff changeset
154 " movntq %%mm0, (%1)\n"
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155 : : "r" (from), "r" (to) : "memory");
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diff changeset
156 from+=8;
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diff changeset
157 to+=8;
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diff changeset
158 }
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diff changeset
159 if (len&7)
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diff changeset
160 SDL_memcpy(to, from, len&7);
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diff changeset
161 }
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diff changeset
162 #endif
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163
0
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164 static void SDL_BlitCopy(SDL_BlitInfo *info)
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165 {
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166 Uint8 *src, *dst;
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167 int w, h;
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168 int srcskip, dstskip;
697
8468fc0504f3 *** empty log message ***
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parents: 689
diff changeset
169 #if defined(i386) && defined(__GNUC__) && defined(USE_ASMBLIT)
689
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diff changeset
170 Uint32 f;
697
8468fc0504f3 *** empty log message ***
Sam Lantinga <slouken@libsdl.org>
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diff changeset
171 #endif
0
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172
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173 w = info->d_width*info->dst->BytesPerPixel;
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174 h = info->d_height;
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175 src = info->s_pixels;
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176 dst = info->d_pixels;
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177 srcskip = w+info->s_skip;
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178 dstskip = w+info->d_skip;
689
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179 #if defined(i386) && defined(__GNUC__) && defined(USE_ASMBLIT)
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180 f=CPU_Flags();
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diff changeset
181 if((f&(MMX_CPU|SSE_CPU))==(MMX_CPU|SSE_CPU))
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182 {
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diff changeset
183 while ( h-- ) {
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184 SDL_memcpySSE(dst, src, w);
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185 src += srcskip;
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diff changeset
186 dst += dstskip;
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diff changeset
187 }
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diff changeset
188 __asm__ __volatile__ (
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diff changeset
189 " emms\n"
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diff changeset
190 ::);
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parents: 526
diff changeset
191 }
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Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
192 else
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
193 if((f&(MMX_CPU))!=0)
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Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
194 {
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
195 while ( h-- ) {
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 526
diff changeset
196 SDL_memcpyMMX(dst, src, w);
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
197 src += srcskip;
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diff changeset
198 dst += dstskip;
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diff changeset
199 }
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diff changeset
200 __asm__ __volatile__ (
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diff changeset
201 " emms\n"
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Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
202 ::);
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
203 }
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
204 else
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
205 #endif
0
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parents:
diff changeset
206 while ( h-- ) {
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parents:
diff changeset
207 SDL_memcpy(dst, src, w);
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parents:
diff changeset
208 src += srcskip;
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parents:
diff changeset
209 dst += dstskip;
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parents:
diff changeset
210 }
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parents:
diff changeset
211 }
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parents:
diff changeset
212
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diff changeset
213 static void SDL_BlitCopyOverlap(SDL_BlitInfo *info)
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parents:
diff changeset
214 {
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parents:
diff changeset
215 Uint8 *src, *dst;
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parents:
diff changeset
216 int w, h;
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parents:
diff changeset
217 int srcskip, dstskip;
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parents:
diff changeset
218
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diff changeset
219 w = info->d_width*info->dst->BytesPerPixel;
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parents:
diff changeset
220 h = info->d_height;
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parents:
diff changeset
221 src = info->s_pixels;
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parents:
diff changeset
222 dst = info->d_pixels;
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parents:
diff changeset
223 srcskip = w+info->s_skip;
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parents:
diff changeset
224 dstskip = w+info->d_skip;
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parents:
diff changeset
225 if ( dst < src ) {
74212992fb08 Initial revision
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parents:
diff changeset
226 while ( h-- ) {
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parents:
diff changeset
227 SDL_memcpy(dst, src, w);
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diff changeset
228 src += srcskip;
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parents:
diff changeset
229 dst += dstskip;
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parents:
diff changeset
230 }
74212992fb08 Initial revision
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parents:
diff changeset
231 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
232 src += ((h-1) * srcskip);
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parents:
diff changeset
233 dst += ((h-1) * dstskip);
74212992fb08 Initial revision
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parents:
diff changeset
234 while ( h-- ) {
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parents:
diff changeset
235 SDL_revcpy(dst, src, w);
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
236 src -= srcskip;
74212992fb08 Initial revision
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parents:
diff changeset
237 dst -= dstskip;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
238 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
239 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
240 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
241
74212992fb08 Initial revision
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parents:
diff changeset
242 /* Figure out which of many blit routines to set up on a surface */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
243 int SDL_CalculateBlit(SDL_Surface *surface)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
244 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
245 int blit_index;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
246
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
247 /* Clean everything out to start */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
248 if ( (surface->flags & SDL_RLEACCEL) == SDL_RLEACCEL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
249 SDL_UnRLESurface(surface, 1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
250 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
251 surface->map->sw_blit = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
252
74212992fb08 Initial revision
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parents:
diff changeset
253 /* Figure out if an accelerated hardware blit is possible */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
254 surface->flags &= ~SDL_HWACCEL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
255 if ( surface->map->identity ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
256 int hw_blit_ok;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
257
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
258 if ( (surface->flags & SDL_HWSURFACE) == SDL_HWSURFACE ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
259 /* We only support accelerated blitting to hardware */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
260 if ( surface->map->dst->flags & SDL_HWSURFACE ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
261 hw_blit_ok = current_video->info.blit_hw;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
262 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
263 hw_blit_ok = 0;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
264 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
265 if (hw_blit_ok && (surface->flags & SDL_SRCCOLORKEY)) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
266 hw_blit_ok = current_video->info.blit_hw_CC;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
267 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
268 if ( hw_blit_ok && (surface->flags & SDL_SRCALPHA) ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
269 hw_blit_ok = current_video->info.blit_hw_A;
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parents:
diff changeset
270 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
271 } else {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
272 /* We only support accelerated blitting to hardware */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
273 if ( surface->map->dst->flags & SDL_HWSURFACE ) {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
274 hw_blit_ok = current_video->info.blit_sw;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
275 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
276 hw_blit_ok = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
277 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
278 if (hw_blit_ok && (surface->flags & SDL_SRCCOLORKEY)) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
279 hw_blit_ok = current_video->info.blit_sw_CC;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
280 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
281 if ( hw_blit_ok && (surface->flags & SDL_SRCALPHA) ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
282 hw_blit_ok = current_video->info.blit_sw_A;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
283 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
284 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
285 if ( hw_blit_ok ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
286 SDL_VideoDevice *video = current_video;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
287 SDL_VideoDevice *this = current_video;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
288 video->CheckHWBlit(this, surface, surface->map->dst);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
289 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
290 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
291
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
292 /* Get the blit function index, based on surface mode */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
293 /* { 0 = nothing, 1 = colorkey, 2 = alpha, 3 = colorkey+alpha } */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
294 blit_index = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
295 blit_index |= (!!(surface->flags & SDL_SRCCOLORKEY)) << 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
296 if ( surface->flags & SDL_SRCALPHA
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
297 && (surface->format->alpha != SDL_ALPHA_OPAQUE
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
298 || surface->format->Amask) ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
299 blit_index |= 2;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
300 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
301
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
302 /* Check for special "identity" case -- copy blit */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
303 if ( surface->map->identity && blit_index == 0 ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
304 surface->map->sw_data->blit = SDL_BlitCopy;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
305
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
306 /* Handle overlapping blits on the same surface */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
307 if ( surface == surface->map->dst ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
308 surface->map->sw_data->blit = SDL_BlitCopyOverlap;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
309 }
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310 } else {
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311 if ( surface->format->BitsPerPixel < 8 ) {
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312 surface->map->sw_data->blit =
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313 SDL_CalculateBlit0(surface, blit_index);
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314 } else {
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315 switch ( surface->format->BytesPerPixel ) {
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316 case 1:
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317 surface->map->sw_data->blit =
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318 SDL_CalculateBlit1(surface, blit_index);
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319 break;
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320 case 2:
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321 case 3:
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322 case 4:
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323 surface->map->sw_data->blit =
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324 SDL_CalculateBlitN(surface, blit_index);
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325 break;
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326 default:
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327 surface->map->sw_data->blit = NULL;
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328 break;
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329 }
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330 }
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331 }
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332 /* Make sure we have a blit function */
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333 if ( surface->map->sw_data->blit == NULL ) {
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334 SDL_InvalidateMap(surface->map);
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335 SDL_SetError("Blit combination not supported");
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336 return(-1);
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337 }
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338
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339 /* Choose software blitting function */
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340 if(surface->flags & SDL_RLEACCELOK
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341 && (surface->flags & SDL_HWACCEL) != SDL_HWACCEL) {
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342
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343 if(surface->map->identity
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344 && (blit_index == 1
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345 || (blit_index == 3 && !surface->format->Amask))) {
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346 if ( SDL_RLESurface(surface) == 0 )
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347 surface->map->sw_blit = SDL_RLEBlit;
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348 } else if(blit_index == 2 && surface->format->Amask) {
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349 if ( SDL_RLESurface(surface) == 0 )
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350 surface->map->sw_blit = SDL_RLEAlphaBlit;
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351 }
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352 }
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353
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354 if ( surface->map->sw_blit == NULL ) {
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355 surface->map->sw_blit = SDL_SoftBlit;
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356 }
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357 return(0);
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358 }
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359