Mercurial > sdl-ios-xcode
annotate src/video/SDL_blit.c @ 4066:58a5055da431 SDL-1.2
More improvements for bug #373
Show the SDL cursor in the window and the arrow cursor outside the window.
This is also supposed to show the SDL cursor when activated, but that code
isn't working yet...
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sat, 14 Jul 2007 08:27:06 +0000 |
| parents | 6832b00d3594 |
| children | a1b03ba2fcd0 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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3 Copyright (C) 1997-2006 Sam Lantinga |
| 0 | 4 |
| 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 |
| 0 | 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. |
| 0 | 9 |
| 10 This library is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
|
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13 Lesser General Public License for more details. |
| 0 | 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 |
| 0 | 18 |
| 19 Sam Lantinga | |
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20 slouken@libsdl.org |
| 0 | 21 */ |
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22 #include "SDL_config.h" |
| 0 | 23 |
| 24 #include "SDL_video.h" | |
| 25 #include "SDL_sysvideo.h" | |
| 26 #include "SDL_blit.h" | |
| 27 #include "SDL_RLEaccel_c.h" | |
| 28 #include "SDL_pixels_c.h" | |
| 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 |
| 0 | 42 /* The general purpose software blit routine */ |
| 43 static int SDL_SoftBlit(SDL_Surface *src, SDL_Rect *srcrect, | |
| 44 SDL_Surface *dst, SDL_Rect *dstrect) | |
| 45 { | |
| 46 int okay; | |
| 47 int src_locked; | |
| 48 int dst_locked; | |
| 49 | |
| 50 /* Everything is okay at the beginning... */ | |
| 51 okay = 1; | |
| 52 | |
| 53 /* Lock the destination if it's in hardware */ | |
| 54 dst_locked = 0; | |
|
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55 if ( SDL_MUSTLOCK(dst) ) { |
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56 if ( SDL_LockSurface(dst) < 0 ) { |
| 0 | 57 okay = 0; |
| 58 } else { | |
| 59 dst_locked = 1; | |
| 60 } | |
| 61 } | |
| 62 /* Lock the source if it's in hardware */ | |
| 63 src_locked = 0; | |
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64 if ( SDL_MUSTLOCK(src) ) { |
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65 if ( SDL_LockSurface(src) < 0 ) { |
| 0 | 66 okay = 0; |
| 67 } else { | |
| 68 src_locked = 1; | |
| 69 } | |
| 70 } | |
| 71 | |
| 72 /* Set up source and destination buffer pointers, and BLIT! */ | |
| 73 if ( okay && srcrect->w && srcrect->h ) { | |
| 74 SDL_BlitInfo info; | |
| 75 SDL_loblit RunBlit; | |
| 76 | |
| 77 /* Set up the blit information */ | |
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78 info.s_pixels = (Uint8 *)src->pixels + |
| 0 | 79 (Uint16)srcrect->y*src->pitch + |
| 80 (Uint16)srcrect->x*src->format->BytesPerPixel; | |
| 81 info.s_width = srcrect->w; | |
| 82 info.s_height = srcrect->h; | |
| 83 info.s_skip=src->pitch-info.s_width*src->format->BytesPerPixel; | |
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84 info.d_pixels = (Uint8 *)dst->pixels + |
| 0 | 85 (Uint16)dstrect->y*dst->pitch + |
| 86 (Uint16)dstrect->x*dst->format->BytesPerPixel; | |
| 87 info.d_width = dstrect->w; | |
| 88 info.d_height = dstrect->h; | |
| 89 info.d_skip=dst->pitch-info.d_width*dst->format->BytesPerPixel; | |
| 90 info.aux_data = src->map->sw_data->aux_data; | |
| 91 info.src = src->format; | |
| 92 info.table = src->map->table; | |
| 93 info.dst = dst->format; | |
| 94 RunBlit = src->map->sw_data->blit; | |
| 95 | |
| 96 /* Run the actual software blit */ | |
| 97 RunBlit(&info); | |
| 98 } | |
| 99 | |
| 100 /* We need to unlock the surfaces if they're locked */ | |
| 101 if ( dst_locked ) { | |
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102 SDL_UnlockSurface(dst); |
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103 } |
| 0 | 104 if ( src_locked ) { |
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105 SDL_UnlockSurface(src); |
| 0 | 106 } |
| 107 /* Blit is done! */ | |
| 108 return(okay ? 0 : -1); | |
| 109 } | |
| 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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146 from+=8; |
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147 to+=8; |
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148 } |
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149 if (len&7) |
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150 SDL_memcpy(to, from, len&7); |
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151 } |
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152 #endif |
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153 #endif |
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154 |
| 0 | 155 static void SDL_BlitCopy(SDL_BlitInfo *info) |
| 156 { | |
| 157 Uint8 *src, *dst; | |
| 158 int w, h; | |
| 159 int srcskip, dstskip; | |
| 160 | |
| 161 w = info->d_width*info->dst->BytesPerPixel; | |
| 162 h = info->d_height; | |
| 163 src = info->s_pixels; | |
| 164 dst = info->d_pixels; | |
| 165 srcskip = w+info->s_skip; | |
| 166 dstskip = w+info->d_skip; | |
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167 |
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168 #ifdef SSE_ASMBLIT |
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169 if(SDL_HasSSE()) |
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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 |
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183 if(SDL_HasMMX()) |
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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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191 " emms\n" |
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192 ::); |
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193 } |
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194 else |
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195 #endif |
| 0 | 196 while ( h-- ) { |
| 197 SDL_memcpy(dst, src, w); | |
| 198 src += srcskip; | |
| 199 dst += dstskip; | |
| 200 } | |
| 201 } | |
| 202 | |
| 203 static void SDL_BlitCopyOverlap(SDL_BlitInfo *info) | |
| 204 { | |
| 205 Uint8 *src, *dst; | |
| 206 int w, h; | |
| 207 int srcskip, dstskip; | |
| 208 | |
| 209 w = info->d_width*info->dst->BytesPerPixel; | |
| 210 h = info->d_height; | |
| 211 src = info->s_pixels; | |
| 212 dst = info->d_pixels; | |
| 213 srcskip = w+info->s_skip; | |
| 214 dstskip = w+info->d_skip; | |
| 215 if ( dst < src ) { | |
| 216 while ( h-- ) { | |
| 217 SDL_memcpy(dst, src, w); | |
| 218 src += srcskip; | |
| 219 dst += dstskip; | |
| 220 } | |
| 221 } else { | |
| 222 src += ((h-1) * srcskip); | |
| 223 dst += ((h-1) * dstskip); | |
| 224 while ( h-- ) { | |
| 225 SDL_revcpy(dst, src, w); | |
| 226 src -= srcskip; | |
| 227 dst -= dstskip; | |
| 228 } | |
| 229 } | |
| 230 } | |
| 231 | |
| 232 /* Figure out which of many blit routines to set up on a surface */ | |
| 233 int SDL_CalculateBlit(SDL_Surface *surface) | |
| 234 { | |
| 235 int blit_index; | |
| 236 | |
| 237 /* Clean everything out to start */ | |
| 238 if ( (surface->flags & SDL_RLEACCEL) == SDL_RLEACCEL ) { | |
| 239 SDL_UnRLESurface(surface, 1); | |
| 240 } | |
| 241 surface->map->sw_blit = NULL; | |
| 242 | |
| 243 /* Figure out if an accelerated hardware blit is possible */ | |
| 244 surface->flags &= ~SDL_HWACCEL; | |
| 245 if ( surface->map->identity ) { | |
| 246 int hw_blit_ok; | |
| 247 | |
| 248 if ( (surface->flags & SDL_HWSURFACE) == SDL_HWSURFACE ) { | |
| 249 /* We only support accelerated blitting to hardware */ | |
| 250 if ( surface->map->dst->flags & SDL_HWSURFACE ) { | |
| 251 hw_blit_ok = current_video->info.blit_hw; | |
| 252 } else { | |
| 253 hw_blit_ok = 0; | |
| 254 } | |
| 255 if (hw_blit_ok && (surface->flags & SDL_SRCCOLORKEY)) { | |
| 256 hw_blit_ok = current_video->info.blit_hw_CC; | |
| 257 } | |
| 258 if ( hw_blit_ok && (surface->flags & SDL_SRCALPHA) ) { | |
| 259 hw_blit_ok = current_video->info.blit_hw_A; | |
| 260 } | |
| 261 } else { | |
| 262 /* We only support accelerated blitting to hardware */ | |
| 263 if ( surface->map->dst->flags & SDL_HWSURFACE ) { | |
| 264 hw_blit_ok = current_video->info.blit_sw; | |
| 265 } else { | |
| 266 hw_blit_ok = 0; | |
| 267 } | |
| 268 if (hw_blit_ok && (surface->flags & SDL_SRCCOLORKEY)) { | |
| 269 hw_blit_ok = current_video->info.blit_sw_CC; | |
| 270 } | |
| 271 if ( hw_blit_ok && (surface->flags & SDL_SRCALPHA) ) { | |
| 272 hw_blit_ok = current_video->info.blit_sw_A; | |
| 273 } | |
| 274 } | |
| 275 if ( hw_blit_ok ) { | |
| 276 SDL_VideoDevice *video = current_video; | |
| 277 SDL_VideoDevice *this = current_video; | |
| 278 video->CheckHWBlit(this, surface, surface->map->dst); | |
| 279 } | |
| 280 } | |
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281 |
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282 /* if an alpha pixel format is specified, we can accelerate alpha blits */ |
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283 if (((surface->flags & SDL_HWSURFACE) == SDL_HWSURFACE )&&(current_video->displayformatalphapixel)) |
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284 { |
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285 if ( (surface->flags & SDL_SRCALPHA) ) |
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286 if ( current_video->info.blit_hw_A ) { |
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287 SDL_VideoDevice *video = current_video; |
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288 SDL_VideoDevice *this = current_video; |
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289 video->CheckHWBlit(this, surface, surface->map->dst); |
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290 } |
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291 } |
| 0 | 292 |
| 293 /* Get the blit function index, based on surface mode */ | |
| 294 /* { 0 = nothing, 1 = colorkey, 2 = alpha, 3 = colorkey+alpha } */ | |
| 295 blit_index = 0; | |
| 296 blit_index |= (!!(surface->flags & SDL_SRCCOLORKEY)) << 0; | |
| 297 if ( surface->flags & SDL_SRCALPHA | |
| 298 && (surface->format->alpha != SDL_ALPHA_OPAQUE | |
| 299 || surface->format->Amask) ) { | |
| 300 blit_index |= 2; | |
| 301 } | |
| 302 | |
| 303 /* Check for special "identity" case -- copy blit */ | |
| 304 if ( surface->map->identity && blit_index == 0 ) { | |
| 305 surface->map->sw_data->blit = SDL_BlitCopy; | |
| 306 | |
| 307 /* Handle overlapping blits on the same surface */ | |
| 308 if ( surface == surface->map->dst ) { | |
| 309 surface->map->sw_data->blit = SDL_BlitCopyOverlap; | |
| 310 } | |
| 311 } else { | |
| 312 if ( surface->format->BitsPerPixel < 8 ) { | |
| 313 surface->map->sw_data->blit = | |
| 314 SDL_CalculateBlit0(surface, blit_index); | |
| 315 } else { | |
| 316 switch ( surface->format->BytesPerPixel ) { | |
| 317 case 1: | |
| 318 surface->map->sw_data->blit = | |
| 319 SDL_CalculateBlit1(surface, blit_index); | |
| 320 break; | |
| 321 case 2: | |
| 322 case 3: | |
| 323 case 4: | |
| 324 surface->map->sw_data->blit = | |
| 325 SDL_CalculateBlitN(surface, blit_index); | |
| 326 break; | |
| 327 default: | |
| 328 surface->map->sw_data->blit = NULL; | |
| 329 break; | |
| 330 } | |
| 331 } | |
| 332 } | |
| 333 /* Make sure we have a blit function */ | |
| 334 if ( surface->map->sw_data->blit == NULL ) { | |
| 335 SDL_InvalidateMap(surface->map); | |
| 336 SDL_SetError("Blit combination not supported"); | |
| 337 return(-1); | |
| 338 } | |
| 339 | |
| 340 /* Choose software blitting function */ | |
| 341 if(surface->flags & SDL_RLEACCELOK | |
| 342 && (surface->flags & SDL_HWACCEL) != SDL_HWACCEL) { | |
| 343 | |
| 344 if(surface->map->identity | |
| 345 && (blit_index == 1 | |
| 346 || (blit_index == 3 && !surface->format->Amask))) { | |
| 347 if ( SDL_RLESurface(surface) == 0 ) | |
| 348 surface->map->sw_blit = SDL_RLEBlit; | |
| 349 } else if(blit_index == 2 && surface->format->Amask) { | |
| 350 if ( SDL_RLESurface(surface) == 0 ) | |
| 351 surface->map->sw_blit = SDL_RLEAlphaBlit; | |
| 352 } | |
| 353 } | |
| 354 | |
| 355 if ( surface->map->sw_blit == NULL ) { | |
| 356 surface->map->sw_blit = SDL_SoftBlit; | |
| 357 } | |
| 358 return(0); | |
| 359 } | |
| 360 |