annotate src/video/SDL_blit.c @ 4072:6930cd5ab933 SDL-1.2

Final fix for bug #373 ------- Comment #13 From Christian Walther 2007-07-15 10:04:56 [reply] ------- Created an attachment (id=229) [details] patch to reinstate the SDL cursor after an NSApplicationActivatedEvent Oops, you're right. My testcursor.c has diverged so far from the original that I missed that. In fact, now that I think about it, that issue isn't even addressed by the cursor rectangle patch - it is only concerned with windowed mode (and fixes the problem there as a side effect). The problem in fullscreen is still the same as before. How about the attachment for a fix? (I can confirm that [NSCursor set] doesn't seem to have any effect when called from QZ_DoActivate().)
author Sam Lantinga <slouken@libsdl.org>
date Sun, 15 Jul 2007 17:22:39 +0000
parents 6832b00d3594
children a1b03ba2fcd0
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 #include "SDL_video.h"
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25 #include "SDL_sysvideo.h"
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26 #include "SDL_blit.h"
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27 #include "SDL_RLEaccel_c.h"
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28 #include "SDL_pixels_c.h"
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29
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30 #if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__)) && SDL_ASSEMBLY_ROUTINES
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31 #define MMX_ASMBLIT
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32 #if (__GNUC__ > 2) /* SSE instructions aren't in GCC 2. */
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33 #define SSE_ASMBLIT
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34 #endif
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35 #endif
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36
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37 #if defined(MMX_ASMBLIT)
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38 #include "SDL_cpuinfo.h"
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39 #include "mmx.h"
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40 #endif
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41
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42 /* The general purpose software blit routine */
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43 static int SDL_SoftBlit(SDL_Surface *src, SDL_Rect *srcrect,
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44 SDL_Surface *dst, SDL_Rect *dstrect)
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45 {
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46 int okay;
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47 int src_locked;
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48 int dst_locked;
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49
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50 /* Everything is okay at the beginning... */
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51 okay = 1;
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52
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53 /* Lock the destination if it's in hardware */
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54 dst_locked = 0;
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55 if ( SDL_MUSTLOCK(dst) ) {
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56 if ( SDL_LockSurface(dst) < 0 ) {
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57 okay = 0;
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58 } else {
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59 dst_locked = 1;
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60 }
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61 }
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62 /* Lock the source if it's in hardware */
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63 src_locked = 0;
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64 if ( SDL_MUSTLOCK(src) ) {
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65 if ( SDL_LockSurface(src) < 0 ) {
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66 okay = 0;
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67 } else {
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68 src_locked = 1;
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69 }
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70 }
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71
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72 /* Set up source and destination buffer pointers, and BLIT! */
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73 if ( okay && srcrect->w && srcrect->h ) {
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74 SDL_BlitInfo info;
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75 SDL_loblit RunBlit;
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76
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77 /* Set up the blit information */
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78 info.s_pixels = (Uint8 *)src->pixels +
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79 (Uint16)srcrect->y*src->pitch +
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80 (Uint16)srcrect->x*src->format->BytesPerPixel;
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81 info.s_width = srcrect->w;
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82 info.s_height = srcrect->h;
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83 info.s_skip=src->pitch-info.s_width*src->format->BytesPerPixel;
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84 info.d_pixels = (Uint8 *)dst->pixels +
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85 (Uint16)dstrect->y*dst->pitch +
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86 (Uint16)dstrect->x*dst->format->BytesPerPixel;
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87 info.d_width = dstrect->w;
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88 info.d_height = dstrect->h;
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89 info.d_skip=dst->pitch-info.d_width*dst->format->BytesPerPixel;
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90 info.aux_data = src->map->sw_data->aux_data;
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91 info.src = src->format;
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92 info.table = src->map->table;
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93 info.dst = dst->format;
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94 RunBlit = src->map->sw_data->blit;
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95
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96 /* Run the actual software blit */
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97 RunBlit(&info);
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98 }
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99
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100 /* We need to unlock the surfaces if they're locked */
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101 if ( dst_locked ) {
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102 SDL_UnlockSurface(dst);
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103 }
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104 if ( src_locked ) {
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105 SDL_UnlockSurface(src);
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106 }
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107 /* Blit is done! */
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108 return(okay ? 0 : -1);
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109 }
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110
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111 #ifdef MMX_ASMBLIT
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112 static __inline__ void SDL_memcpyMMX(Uint8 *to, const Uint8 *from, int len)
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113 {
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114 int i;
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115
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116 for(i=0; i<len/8; i++) {
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117 __asm__ __volatile__ (
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118 " movq (%0), %%mm0\n"
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119 " movq %%mm0, (%1)\n"
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120 : : "r" (from), "r" (to) : "memory");
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121 from+=8;
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122 to+=8;
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123 }
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124 if (len&7)
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125 SDL_memcpy(to, from, len&7);
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126 }
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127
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128 #ifdef SSE_ASMBLIT
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129 static __inline__ void SDL_memcpySSE(Uint8 *to, const Uint8 *from, int len)
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130 {
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131 int i;
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132
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133 __asm__ __volatile__ (
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134 " prefetchnta (%0)\n"
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135 " prefetchnta 64(%0)\n"
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136 " prefetchnta 128(%0)\n"
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137 " prefetchnta 192(%0)\n"
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138 : : "r" (from) );
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139
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140 for(i=0; i<len/8; i++) {
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141 __asm__ __volatile__ (
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142 " prefetchnta 256(%0)\n"
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143 " movq (%0), %%mm0\n"
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144 " movntq %%mm0, (%1)\n"
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145 : : "r" (from), "r" (to) : "memory");
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diff changeset
146 from+=8;
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diff changeset
147 to+=8;
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diff changeset
148 }
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diff changeset
149 if (len&7)
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diff changeset
150 SDL_memcpy(to, from, len&7);
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diff changeset
151 }
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diff changeset
152 #endif
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Ryan C. Gordon <icculus@icculus.org>
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153 #endif
689
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154
0
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155 static void SDL_BlitCopy(SDL_BlitInfo *info)
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156 {
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157 Uint8 *src, *dst;
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158 int w, h;
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159 int srcskip, dstskip;
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160
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161 w = info->d_width*info->dst->BytesPerPixel;
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162 h = info->d_height;
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163 src = info->s_pixels;
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164 dst = info->d_pixels;
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165 srcskip = w+info->s_skip;
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166 dstskip = w+info->d_skip;
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167
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168 #ifdef SSE_ASMBLIT
739
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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parents: 697
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169 if(SDL_HasSSE())
689
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170 {
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171 while ( h-- ) {
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172 SDL_memcpySSE(dst, src, w);
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173 src += srcskip;
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174 dst += dstskip;
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175 }
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176 __asm__ __volatile__ (
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177 " emms\n"
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178 ::);
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179 }
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180 else
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181 #endif
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182 #ifdef MMX_ASMBLIT
739
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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parents: 697
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183 if(SDL_HasMMX())
689
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diff changeset
184 {
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185 while ( h-- ) {
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186 SDL_memcpyMMX(dst, src, w);
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187 src += srcskip;
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188 dst += dstskip;
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189 }
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190 __asm__ __volatile__ (
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diff changeset
191 " emms\n"
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diff changeset
192 ::);
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diff changeset
193 }
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diff changeset
194 else
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diff changeset
195 #endif
0
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196 while ( h-- ) {
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197 SDL_memcpy(dst, src, w);
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198 src += srcskip;
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199 dst += dstskip;
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200 }
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201 }
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202
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diff changeset
203 static void SDL_BlitCopyOverlap(SDL_BlitInfo *info)
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diff changeset
204 {
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diff changeset
205 Uint8 *src, *dst;
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diff changeset
206 int w, h;
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diff changeset
207 int srcskip, dstskip;
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parents:
diff changeset
208
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209 w = info->d_width*info->dst->BytesPerPixel;
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210 h = info->d_height;
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diff changeset
211 src = info->s_pixels;
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212 dst = info->d_pixels;
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213 srcskip = w+info->s_skip;
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214 dstskip = w+info->d_skip;
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parents:
diff changeset
215 if ( dst < src ) {
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parents:
diff changeset
216 while ( h-- ) {
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diff changeset
217 SDL_memcpy(dst, src, w);
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218 src += srcskip;
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diff changeset
219 dst += dstskip;
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parents:
diff changeset
220 }
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diff changeset
221 } else {
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222 src += ((h-1) * srcskip);
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diff changeset
223 dst += ((h-1) * dstskip);
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parents:
diff changeset
224 while ( h-- ) {
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diff changeset
225 SDL_revcpy(dst, src, w);
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diff changeset
226 src -= srcskip;
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parents:
diff changeset
227 dst -= dstskip;
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parents:
diff changeset
228 }
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parents:
diff changeset
229 }
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parents:
diff changeset
230 }
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parents:
diff changeset
231
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parents:
diff changeset
232 /* Figure out which of many blit routines to set up on a surface */
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parents:
diff changeset
233 int SDL_CalculateBlit(SDL_Surface *surface)
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parents:
diff changeset
234 {
74212992fb08 Initial revision
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parents:
diff changeset
235 int blit_index;
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parents:
diff changeset
236
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parents:
diff changeset
237 /* Clean everything out to start */
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
238 if ( (surface->flags & SDL_RLEACCEL) == SDL_RLEACCEL ) {
74212992fb08 Initial revision
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parents:
diff changeset
239 SDL_UnRLESurface(surface, 1);
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parents:
diff changeset
240 }
74212992fb08 Initial revision
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parents:
diff changeset
241 surface->map->sw_blit = NULL;
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parents:
diff changeset
242
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parents:
diff changeset
243 /* Figure out if an accelerated hardware blit is possible */
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parents:
diff changeset
244 surface->flags &= ~SDL_HWACCEL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
245 if ( surface->map->identity ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
246 int hw_blit_ok;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
247
74212992fb08 Initial revision
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parents:
diff changeset
248 if ( (surface->flags & SDL_HWSURFACE) == SDL_HWSURFACE ) {
74212992fb08 Initial revision
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parents:
diff changeset
249 /* We only support accelerated blitting to hardware */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
250 if ( surface->map->dst->flags & SDL_HWSURFACE ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
251 hw_blit_ok = current_video->info.blit_hw;
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parents:
diff changeset
252 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
253 hw_blit_ok = 0;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
254 }
74212992fb08 Initial revision
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parents:
diff changeset
255 if (hw_blit_ok && (surface->flags & SDL_SRCCOLORKEY)) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
256 hw_blit_ok = current_video->info.blit_hw_CC;
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parents:
diff changeset
257 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
258 if ( hw_blit_ok && (surface->flags & SDL_SRCALPHA) ) {
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parents:
diff changeset
259 hw_blit_ok = current_video->info.blit_hw_A;
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parents:
diff changeset
260 }
74212992fb08 Initial revision
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parents:
diff changeset
261 } else {
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parents:
diff changeset
262 /* We only support accelerated blitting to hardware */
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parents:
diff changeset
263 if ( surface->map->dst->flags & SDL_HWSURFACE ) {
74212992fb08 Initial revision
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parents:
diff changeset
264 hw_blit_ok = current_video->info.blit_sw;
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parents:
diff changeset
265 } else {
74212992fb08 Initial revision
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parents:
diff changeset
266 hw_blit_ok = 0;
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parents:
diff changeset
267 }
74212992fb08 Initial revision
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parents:
diff changeset
268 if (hw_blit_ok && (surface->flags & SDL_SRCCOLORKEY)) {
74212992fb08 Initial revision
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parents:
diff changeset
269 hw_blit_ok = current_video->info.blit_sw_CC;
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parents:
diff changeset
270 }
74212992fb08 Initial revision
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parents:
diff changeset
271 if ( hw_blit_ok && (surface->flags & SDL_SRCALPHA) ) {
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parents:
diff changeset
272 hw_blit_ok = current_video->info.blit_sw_A;
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parents:
diff changeset
273 }
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parents:
diff changeset
274 }
74212992fb08 Initial revision
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parents:
diff changeset
275 if ( hw_blit_ok ) {
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parents:
diff changeset
276 SDL_VideoDevice *video = current_video;
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parents:
diff changeset
277 SDL_VideoDevice *this = current_video;
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parents:
diff changeset
278 video->CheckHWBlit(this, surface, surface->map->dst);
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parents:
diff changeset
279 }
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parents:
diff changeset
280 }
1052
68f607298ca9 Some work on using accelerated alpha blits with hardware surfaces.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
281
68f607298ca9 Some work on using accelerated alpha blits with hardware surfaces.
Ryan C. Gordon <icculus@icculus.org>
parents: 882
diff changeset
282 /* if an alpha pixel format is specified, we can accelerate alpha blits */
68f607298ca9 Some work on using accelerated alpha blits with hardware surfaces.
Ryan C. Gordon <icculus@icculus.org>
parents: 882
diff changeset
283 if (((surface->flags & SDL_HWSURFACE) == SDL_HWSURFACE )&&(current_video->displayformatalphapixel))
68f607298ca9 Some work on using accelerated alpha blits with hardware surfaces.
Ryan C. Gordon <icculus@icculus.org>
parents: 882
diff changeset
284 {
68f607298ca9 Some work on using accelerated alpha blits with hardware surfaces.
Ryan C. Gordon <icculus@icculus.org>
parents: 882
diff changeset
285 if ( (surface->flags & SDL_SRCALPHA) )
68f607298ca9 Some work on using accelerated alpha blits with hardware surfaces.
Ryan C. Gordon <icculus@icculus.org>
parents: 882
diff changeset
286 if ( current_video->info.blit_hw_A ) {
68f607298ca9 Some work on using accelerated alpha blits with hardware surfaces.
Ryan C. Gordon <icculus@icculus.org>
parents: 882
diff changeset
287 SDL_VideoDevice *video = current_video;
68f607298ca9 Some work on using accelerated alpha blits with hardware surfaces.
Ryan C. Gordon <icculus@icculus.org>
parents: 882
diff changeset
288 SDL_VideoDevice *this = current_video;
68f607298ca9 Some work on using accelerated alpha blits with hardware surfaces.
Ryan C. Gordon <icculus@icculus.org>
parents: 882
diff changeset
289 video->CheckHWBlit(this, surface, surface->map->dst);
68f607298ca9 Some work on using accelerated alpha blits with hardware surfaces.
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parents: 882
diff changeset
290 }
68f607298ca9 Some work on using accelerated alpha blits with hardware surfaces.
Ryan C. Gordon <icculus@icculus.org>
parents: 882
diff changeset
291 }
0
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parents:
diff changeset
292
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parents:
diff changeset
293 /* Get the blit function index, based on surface mode */
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parents:
diff changeset
294 /* { 0 = nothing, 1 = colorkey, 2 = alpha, 3 = colorkey+alpha } */
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parents:
diff changeset
295 blit_index = 0;
74212992fb08 Initial revision
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parents:
diff changeset
296 blit_index |= (!!(surface->flags & SDL_SRCCOLORKEY)) << 0;
74212992fb08 Initial revision
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parents:
diff changeset
297 if ( surface->flags & SDL_SRCALPHA
74212992fb08 Initial revision
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parents:
diff changeset
298 && (surface->format->alpha != SDL_ALPHA_OPAQUE
74212992fb08 Initial revision
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parents:
diff changeset
299 || surface->format->Amask) ) {
74212992fb08 Initial revision
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parents:
diff changeset
300 blit_index |= 2;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
301 }
74212992fb08 Initial revision
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parents:
diff changeset
302
74212992fb08 Initial revision
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parents:
diff changeset
303 /* Check for special "identity" case -- copy blit */
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304 if ( surface->map->identity && blit_index == 0 ) {
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305 surface->map->sw_data->blit = SDL_BlitCopy;
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306
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307 /* Handle overlapping blits on the same surface */
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308 if ( surface == surface->map->dst ) {
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309 surface->map->sw_data->blit = SDL_BlitCopyOverlap;
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310 }
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311 } else {
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312 if ( surface->format->BitsPerPixel < 8 ) {
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313 surface->map->sw_data->blit =
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314 SDL_CalculateBlit0(surface, blit_index);
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315 } else {
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316 switch ( surface->format->BytesPerPixel ) {
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317 case 1:
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318 surface->map->sw_data->blit =
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319 SDL_CalculateBlit1(surface, blit_index);
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320 break;
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321 case 2:
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322 case 3:
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323 case 4:
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324 surface->map->sw_data->blit =
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325 SDL_CalculateBlitN(surface, blit_index);
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326 break;
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327 default:
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328 surface->map->sw_data->blit = NULL;
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329 break;
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330 }
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331 }
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332 }
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333 /* Make sure we have a blit function */
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334 if ( surface->map->sw_data->blit == NULL ) {
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335 SDL_InvalidateMap(surface->map);
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336 SDL_SetError("Blit combination not supported");
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337 return(-1);
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338 }
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339
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340 /* Choose software blitting function */
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341 if(surface->flags & SDL_RLEACCELOK
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342 && (surface->flags & SDL_HWACCEL) != SDL_HWACCEL) {
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343
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344 if(surface->map->identity
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345 && (blit_index == 1
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346 || (blit_index == 3 && !surface->format->Amask))) {
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347 if ( SDL_RLESurface(surface) == 0 )
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348 surface->map->sw_blit = SDL_RLEBlit;
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349 } else if(blit_index == 2 && surface->format->Amask) {
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350 if ( SDL_RLESurface(surface) == 0 )
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351 surface->map->sw_blit = SDL_RLEAlphaBlit;
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352 }
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353 }
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354
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355 if ( surface->map->sw_blit == NULL ) {
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356 surface->map->sw_blit = SDL_SoftBlit;
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357 }
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358 return(0);
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359 }
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360