Mercurial > sdl-ios-xcode
annotate src/video/SDL_blit.c @ 697:8468fc0504f3
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| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sat, 30 Aug 2003 00:36:20 +0000 |
| parents | 5bb080d35049 |
| children | 22dbf364c017 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
| 6 modify it under the terms of the GNU Library General Public | |
| 7 License as published by the Free Software Foundation; either | |
| 8 version 2 of the License, or (at your option) any later version. | |
| 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 | |
| 13 Library General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU Library General Public | |
| 16 License along with this library; if not, write to the Free | |
| 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 | |
| 19 Sam Lantinga | |
|
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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 #ifdef SAVE_RCSID | |
| 24 static char rcsid = | |
| 25 "@(#) $Id$"; | |
| 26 #endif | |
| 27 | |
| 28 #include <stdio.h> | |
| 29 #include <stdlib.h> | |
| 30 #include <string.h> | |
| 31 | |
| 32 #include "SDL_error.h" | |
| 33 #include "SDL_video.h" | |
| 34 #include "SDL_sysvideo.h" | |
| 35 #include "SDL_blit.h" | |
| 36 #include "SDL_RLEaccel_c.h" | |
| 37 #include "SDL_pixels_c.h" | |
| 38 #include "SDL_memops.h" | |
| 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 | 53 /* The general purpose software blit routine */ |
| 54 static int SDL_SoftBlit(SDL_Surface *src, SDL_Rect *srcrect, | |
| 55 SDL_Surface *dst, SDL_Rect *dstrect) | |
| 56 { | |
| 57 int okay; | |
| 58 int src_locked; | |
| 59 int dst_locked; | |
| 60 | |
| 61 /* Everything is okay at the beginning... */ | |
| 62 okay = 1; | |
| 63 | |
| 64 /* Lock the destination if it's in hardware */ | |
| 65 dst_locked = 0; | |
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66 if ( SDL_MUSTLOCK(dst) ) { |
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67 if ( SDL_LockSurface(dst) < 0 ) { |
| 0 | 68 okay = 0; |
| 69 } else { | |
| 70 dst_locked = 1; | |
| 71 } | |
| 72 } | |
| 73 /* Lock the source if it's in hardware */ | |
| 74 src_locked = 0; | |
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75 if ( SDL_MUSTLOCK(src) ) { |
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76 if ( SDL_LockSurface(src) < 0 ) { |
| 0 | 77 okay = 0; |
| 78 } else { | |
| 79 src_locked = 1; | |
| 80 } | |
| 81 } | |
| 82 | |
| 83 /* Set up source and destination buffer pointers, and BLIT! */ | |
| 84 if ( okay && srcrect->w && srcrect->h ) { | |
| 85 SDL_BlitInfo info; | |
| 86 SDL_loblit RunBlit; | |
| 87 | |
| 88 /* Set up the blit information */ | |
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89 info.s_pixels = (Uint8 *)src->pixels + |
| 0 | 90 (Uint16)srcrect->y*src->pitch + |
| 91 (Uint16)srcrect->x*src->format->BytesPerPixel; | |
| 92 info.s_width = srcrect->w; | |
| 93 info.s_height = srcrect->h; | |
| 94 info.s_skip=src->pitch-info.s_width*src->format->BytesPerPixel; | |
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95 info.d_pixels = (Uint8 *)dst->pixels + |
| 0 | 96 (Uint16)dstrect->y*dst->pitch + |
| 97 (Uint16)dstrect->x*dst->format->BytesPerPixel; | |
| 98 info.d_width = dstrect->w; | |
| 99 info.d_height = dstrect->h; | |
| 100 info.d_skip=dst->pitch-info.d_width*dst->format->BytesPerPixel; | |
| 101 info.aux_data = src->map->sw_data->aux_data; | |
| 102 info.src = src->format; | |
| 103 info.table = src->map->table; | |
| 104 info.dst = dst->format; | |
| 105 RunBlit = src->map->sw_data->blit; | |
| 106 | |
| 107 /* Run the actual software blit */ | |
| 108 RunBlit(&info); | |
| 109 } | |
| 110 | |
| 111 /* We need to unlock the surfaces if they're locked */ | |
| 112 if ( dst_locked ) { | |
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113 SDL_UnlockSurface(dst); |
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114 } |
| 0 | 115 if ( src_locked ) { |
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116 SDL_UnlockSurface(src); |
| 0 | 117 } |
| 118 /* Blit is done! */ | |
| 119 return(okay ? 0 : -1); | |
| 120 } | |
| 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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153 " movq (%0), %%mm0\n" |
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154 " movntq %%mm0, (%1)\n" |
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155 : : "r" (from), "r" (to) : "memory"); |
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156 from+=8; |
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157 to+=8; |
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158 } |
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159 if (len&7) |
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160 SDL_memcpy(to, from, len&7); |
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161 } |
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162 #endif |
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163 |
| 0 | 164 static void SDL_BlitCopy(SDL_BlitInfo *info) |
| 165 { | |
| 166 Uint8 *src, *dst; | |
| 167 int w, h; | |
| 168 int srcskip, dstskip; | |
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169 #if defined(i386) && defined(__GNUC__) && defined(USE_ASMBLIT) |
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170 Uint32 f; |
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171 #endif |
| 0 | 172 |
| 173 w = info->d_width*info->dst->BytesPerPixel; | |
| 174 h = info->d_height; | |
| 175 src = info->s_pixels; | |
| 176 dst = info->d_pixels; | |
| 177 srcskip = w+info->s_skip; | |
| 178 dstskip = w+info->d_skip; | |
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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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181 if((f&(MMX_CPU|SSE_CPU))==(MMX_CPU|SSE_CPU)) |
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182 { |
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183 while ( h-- ) { |
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184 SDL_memcpySSE(dst, src, w); |
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185 src += srcskip; |
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186 dst += dstskip; |
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187 } |
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188 __asm__ __volatile__ ( |
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189 " emms\n" |
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190 ::); |
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191 } |
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192 else |
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193 if((f&(MMX_CPU))!=0) |
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194 { |
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195 while ( h-- ) { |
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196 SDL_memcpyMMX(dst, src, w); |
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197 src += srcskip; |
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198 dst += dstskip; |
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199 } |
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200 __asm__ __volatile__ ( |
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201 " emms\n" |
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202 ::); |
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Date: Tue, 19 Aug 2003 17:57:00 +0200
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203 } |
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Date: Tue, 19 Aug 2003 17:57:00 +0200
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204 else |
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Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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205 #endif |
| 0 | 206 while ( h-- ) { |
| 207 SDL_memcpy(dst, src, w); | |
| 208 src += srcskip; | |
| 209 dst += dstskip; | |
| 210 } | |
| 211 } | |
| 212 | |
| 213 static void SDL_BlitCopyOverlap(SDL_BlitInfo *info) | |
| 214 { | |
| 215 Uint8 *src, *dst; | |
| 216 int w, h; | |
| 217 int srcskip, dstskip; | |
| 218 | |
| 219 w = info->d_width*info->dst->BytesPerPixel; | |
| 220 h = info->d_height; | |
| 221 src = info->s_pixels; | |
| 222 dst = info->d_pixels; | |
| 223 srcskip = w+info->s_skip; | |
| 224 dstskip = w+info->d_skip; | |
| 225 if ( dst < src ) { | |
| 226 while ( h-- ) { | |
| 227 SDL_memcpy(dst, src, w); | |
| 228 src += srcskip; | |
| 229 dst += dstskip; | |
| 230 } | |
| 231 } else { | |
| 232 src += ((h-1) * srcskip); | |
| 233 dst += ((h-1) * dstskip); | |
| 234 while ( h-- ) { | |
| 235 SDL_revcpy(dst, src, w); | |
| 236 src -= srcskip; | |
| 237 dst -= dstskip; | |
| 238 } | |
| 239 } | |
| 240 } | |
| 241 | |
| 242 /* Figure out which of many blit routines to set up on a surface */ | |
| 243 int SDL_CalculateBlit(SDL_Surface *surface) | |
| 244 { | |
| 245 int blit_index; | |
| 246 | |
| 247 /* Clean everything out to start */ | |
| 248 if ( (surface->flags & SDL_RLEACCEL) == SDL_RLEACCEL ) { | |
| 249 SDL_UnRLESurface(surface, 1); | |
| 250 } | |
| 251 surface->map->sw_blit = NULL; | |
| 252 | |
| 253 /* Figure out if an accelerated hardware blit is possible */ | |
| 254 surface->flags &= ~SDL_HWACCEL; | |
| 255 if ( surface->map->identity ) { | |
| 256 int hw_blit_ok; | |
| 257 | |
| 258 if ( (surface->flags & SDL_HWSURFACE) == SDL_HWSURFACE ) { | |
| 259 /* We only support accelerated blitting to hardware */ | |
| 260 if ( surface->map->dst->flags & SDL_HWSURFACE ) { | |
| 261 hw_blit_ok = current_video->info.blit_hw; | |
| 262 } else { | |
| 263 hw_blit_ok = 0; | |
| 264 } | |
| 265 if (hw_blit_ok && (surface->flags & SDL_SRCCOLORKEY)) { | |
| 266 hw_blit_ok = current_video->info.blit_hw_CC; | |
| 267 } | |
| 268 if ( hw_blit_ok && (surface->flags & SDL_SRCALPHA) ) { | |
| 269 hw_blit_ok = current_video->info.blit_hw_A; | |
| 270 } | |
| 271 } else { | |
| 272 /* We only support accelerated blitting to hardware */ | |
| 273 if ( surface->map->dst->flags & SDL_HWSURFACE ) { | |
| 274 hw_blit_ok = current_video->info.blit_sw; | |
| 275 } else { | |
| 276 hw_blit_ok = 0; | |
| 277 } | |
| 278 if (hw_blit_ok && (surface->flags & SDL_SRCCOLORKEY)) { | |
| 279 hw_blit_ok = current_video->info.blit_sw_CC; | |
| 280 } | |
| 281 if ( hw_blit_ok && (surface->flags & SDL_SRCALPHA) ) { | |
| 282 hw_blit_ok = current_video->info.blit_sw_A; | |
| 283 } | |
| 284 } | |
| 285 if ( hw_blit_ok ) { | |
| 286 SDL_VideoDevice *video = current_video; | |
| 287 SDL_VideoDevice *this = current_video; | |
| 288 video->CheckHWBlit(this, surface, surface->map->dst); | |
| 289 } | |
| 290 } | |
| 291 | |
| 292 /* Get the blit function index, based on surface mode */ | |
| 293 /* { 0 = nothing, 1 = colorkey, 2 = alpha, 3 = colorkey+alpha } */ | |
| 294 blit_index = 0; | |
| 295 blit_index |= (!!(surface->flags & SDL_SRCCOLORKEY)) << 0; | |
| 296 if ( surface->flags & SDL_SRCALPHA | |
| 297 && (surface->format->alpha != SDL_ALPHA_OPAQUE | |
| 298 || surface->format->Amask) ) { | |
| 299 blit_index |= 2; | |
| 300 } | |
| 301 | |
| 302 /* Check for special "identity" case -- copy blit */ | |
| 303 if ( surface->map->identity && blit_index == 0 ) { | |
| 304 surface->map->sw_data->blit = SDL_BlitCopy; | |
| 305 | |
| 306 /* Handle overlapping blits on the same surface */ | |
| 307 if ( surface == surface->map->dst ) { | |
| 308 surface->map->sw_data->blit = SDL_BlitCopyOverlap; | |
| 309 } | |
| 310 } else { | |
| 311 if ( surface->format->BitsPerPixel < 8 ) { | |
| 312 surface->map->sw_data->blit = | |
| 313 SDL_CalculateBlit0(surface, blit_index); | |
| 314 } else { | |
| 315 switch ( surface->format->BytesPerPixel ) { | |
| 316 case 1: | |
| 317 surface->map->sw_data->blit = | |
| 318 SDL_CalculateBlit1(surface, blit_index); | |
| 319 break; | |
| 320 case 2: | |
| 321 case 3: | |
| 322 case 4: | |
| 323 surface->map->sw_data->blit = | |
| 324 SDL_CalculateBlitN(surface, blit_index); | |
| 325 break; | |
| 326 default: | |
| 327 surface->map->sw_data->blit = NULL; | |
| 328 break; | |
| 329 } | |
| 330 } | |
| 331 } | |
| 332 /* Make sure we have a blit function */ | |
| 333 if ( surface->map->sw_data->blit == NULL ) { | |
| 334 SDL_InvalidateMap(surface->map); | |
| 335 SDL_SetError("Blit combination not supported"); | |
| 336 return(-1); | |
| 337 } | |
| 338 | |
| 339 /* Choose software blitting function */ | |
| 340 if(surface->flags & SDL_RLEACCELOK | |
| 341 && (surface->flags & SDL_HWACCEL) != SDL_HWACCEL) { | |
| 342 | |
| 343 if(surface->map->identity | |
| 344 && (blit_index == 1 | |
| 345 || (blit_index == 3 && !surface->format->Amask))) { | |
| 346 if ( SDL_RLESurface(surface) == 0 ) | |
| 347 surface->map->sw_blit = SDL_RLEBlit; | |
| 348 } else if(blit_index == 2 && surface->format->Amask) { | |
| 349 if ( SDL_RLESurface(surface) == 0 ) | |
| 350 surface->map->sw_blit = SDL_RLEAlphaBlit; | |
| 351 } | |
| 352 } | |
| 353 | |
| 354 if ( surface->map->sw_blit == NULL ) { | |
| 355 surface->map->sw_blit = SDL_SoftBlit; | |
| 356 } | |
| 357 return(0); | |
| 358 } | |
| 359 |