Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 5131 | clevermous | 1 | /* |
| 2 | SDL - Simple DirectMedia Layer |
||
| 3 | Copyright (C) 1997, 1998, 1999, 2000, 2001 Sam Lantinga |
||
| 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 |
||
| 20 | slouken@devolution.com |
||
| 21 | */ |
||
| 22 | |||
| 23 | |||
| 24 | #include |
||
| 25 | #include |
||
| 26 | |||
| 27 | #include "SDL_types.h" |
||
| 28 | #include "SDL_video.h" |
||
| 29 | #include "SDL_blit.h" |
||
| 30 | |||
| 31 | /* Functions to blit from bitmaps to other surfaces */ |
||
| 32 | |||
| 33 | static void BlitBto1(SDL_BlitInfo *info) |
||
| 34 | { |
||
| 35 | int c; |
||
| 36 | int width, height; |
||
| 37 | Uint8 *src, *map, *dst; |
||
| 38 | int srcskip, dstskip; |
||
| 39 | |||
| 40 | /* Set up some basic variables */ |
||
| 41 | width = info->d_width; |
||
| 42 | height = info->d_height; |
||
| 43 | src = info->s_pixels; |
||
| 44 | srcskip = info->s_skip; |
||
| 45 | dst = info->d_pixels; |
||
| 46 | dstskip = info->d_skip; |
||
| 47 | map = info->table; |
||
| 48 | srcskip += width-(width+7)/8; |
||
| 49 | |||
| 50 | if ( map ) { |
||
| 51 | while ( height-- ) { |
||
| 52 | Uint8 byte = 0, bit; |
||
| 53 | for ( c=0; c |
||
| 54 | if ( (c&7) == 0 ) { |
||
| 55 | byte = *src++; |
||
| 56 | } |
||
| 57 | bit = (byte&0x80)>>7; |
||
| 58 | if ( 1 ) { |
||
| 59 | *dst = map[bit]; |
||
| 60 | } |
||
| 61 | dst++; |
||
| 62 | byte <<= 1; |
||
| 63 | } |
||
| 64 | src += srcskip; |
||
| 65 | dst += dstskip; |
||
| 66 | } |
||
| 67 | } else { |
||
| 68 | while ( height-- ) { |
||
| 69 | Uint8 byte = 0, bit; |
||
| 70 | for ( c=0; c |
||
| 71 | if ( (c&7) == 0 ) { |
||
| 72 | byte = *src++; |
||
| 73 | } |
||
| 74 | bit = (byte&0x80)>>7; |
||
| 75 | if ( 1 ) { |
||
| 76 | *dst = bit; |
||
| 77 | } |
||
| 78 | dst++; |
||
| 79 | byte <<= 1; |
||
| 80 | } |
||
| 81 | src += srcskip; |
||
| 82 | dst += dstskip; |
||
| 83 | } |
||
| 84 | } |
||
| 85 | } |
||
| 86 | static void BlitBto2(SDL_BlitInfo *info) |
||
| 87 | { |
||
| 88 | int c; |
||
| 89 | int width, height; |
||
| 90 | Uint8 *src; |
||
| 91 | Uint16 *map, *dst; |
||
| 92 | int srcskip, dstskip; |
||
| 93 | |||
| 94 | /* Set up some basic variables */ |
||
| 95 | width = info->d_width; |
||
| 96 | height = info->d_height; |
||
| 97 | src = info->s_pixels; |
||
| 98 | srcskip = info->s_skip; |
||
| 99 | dst = (Uint16 *)info->d_pixels; |
||
| 100 | dstskip = info->d_skip/2; |
||
| 101 | map = (Uint16 *)info->table; |
||
| 102 | srcskip += width-(width+7)/8; |
||
| 103 | |||
| 104 | while ( height-- ) { |
||
| 105 | Uint8 byte = 0, bit; |
||
| 106 | for ( c=0; c |
||
| 107 | if ( (c&7) == 0 ) { |
||
| 108 | byte = *src++; |
||
| 109 | } |
||
| 110 | bit = (byte&0x80)>>7; |
||
| 111 | if ( 1 ) { |
||
| 112 | *dst = map[bit]; |
||
| 113 | } |
||
| 114 | byte <<= 1; |
||
| 115 | dst++; |
||
| 116 | } |
||
| 117 | src += srcskip; |
||
| 118 | dst += dstskip; |
||
| 119 | } |
||
| 120 | } |
||
| 121 | static void BlitBto3(SDL_BlitInfo *info) |
||
| 122 | { |
||
| 123 | int c, o; |
||
| 124 | int width, height; |
||
| 125 | Uint8 *src, *map, *dst; |
||
| 126 | int srcskip, dstskip; |
||
| 127 | |||
| 128 | /* Set up some basic variables */ |
||
| 129 | width = info->d_width; |
||
| 130 | height = info->d_height; |
||
| 131 | src = info->s_pixels; |
||
| 132 | srcskip = info->s_skip; |
||
| 133 | dst = info->d_pixels; |
||
| 134 | dstskip = info->d_skip; |
||
| 135 | map = info->table; |
||
| 136 | srcskip += width-(width+7)/8; |
||
| 137 | |||
| 138 | while ( height-- ) { |
||
| 139 | Uint8 byte = 0, bit; |
||
| 140 | for ( c=0; c |
||
| 141 | if ( (c&7) == 0 ) { |
||
| 142 | byte = *src++; |
||
| 143 | } |
||
| 144 | bit = (byte&0x80)>>7; |
||
| 145 | if ( 1 ) { |
||
| 146 | o = bit * 4; |
||
| 147 | dst[0] = map[o++]; |
||
| 148 | dst[1] = map[o++]; |
||
| 149 | dst[2] = map[o++]; |
||
| 150 | } |
||
| 151 | byte <<= 1; |
||
| 152 | dst += 3; |
||
| 153 | } |
||
| 154 | src += srcskip; |
||
| 155 | dst += dstskip; |
||
| 156 | } |
||
| 157 | } |
||
| 158 | static void BlitBto4(SDL_BlitInfo *info) |
||
| 159 | { |
||
| 160 | int width, height; |
||
| 161 | Uint8 *src; |
||
| 162 | Uint32 *map, *dst; |
||
| 163 | int srcskip, dstskip; |
||
| 164 | int c; |
||
| 165 | |||
| 166 | /* Set up some basic variables */ |
||
| 167 | width = info->d_width; |
||
| 168 | height = info->d_height; |
||
| 169 | src = info->s_pixels; |
||
| 170 | srcskip = info->s_skip; |
||
| 171 | dst = (Uint32 *)info->d_pixels; |
||
| 172 | dstskip = info->d_skip/4; |
||
| 173 | map = (Uint32 *)info->table; |
||
| 174 | srcskip += width-(width+7)/8; |
||
| 175 | |||
| 176 | while ( height-- ) { |
||
| 177 | Uint8 byte = 0, bit; |
||
| 178 | for ( c=0; c |
||
| 179 | if ( (c&7) == 0 ) { |
||
| 180 | byte = *src++; |
||
| 181 | } |
||
| 182 | bit = (byte&0x80)>>7; |
||
| 183 | if ( 1 ) { |
||
| 184 | *dst = map[bit]; |
||
| 185 | } |
||
| 186 | byte <<= 1; |
||
| 187 | dst++; |
||
| 188 | } |
||
| 189 | src += srcskip; |
||
| 190 | dst += dstskip; |
||
| 191 | } |
||
| 192 | } |
||
| 193 | |||
| 194 | static void BlitBto1Key(SDL_BlitInfo *info) |
||
| 195 | { |
||
| 196 | int width = info->d_width; |
||
| 197 | int height = info->d_height; |
||
| 198 | Uint8 *src = info->s_pixels; |
||
| 199 | Uint8 *dst = info->d_pixels; |
||
| 200 | int srcskip = info->s_skip; |
||
| 201 | int dstskip = info->d_skip; |
||
| 202 | Uint32 ckey = info->src->colorkey; |
||
| 203 | Uint8 *palmap = info->table; |
||
| 204 | int c; |
||
| 205 | |||
| 206 | /* Set up some basic variables */ |
||
| 207 | srcskip += width-(width+7)/8; |
||
| 208 | |||
| 209 | if ( palmap ) { |
||
| 210 | while ( height-- ) { |
||
| 211 | Uint8 byte = 0, bit; |
||
| 212 | for ( c=0; c |
||
| 213 | if ( (c&7) == 0 ) { |
||
| 214 | byte = *src++; |
||
| 215 | } |
||
| 216 | bit = (byte&0x80)>>7; |
||
| 217 | if ( bit != ckey ) { |
||
| 218 | *dst = palmap[bit]; |
||
| 219 | } |
||
| 220 | dst++; |
||
| 221 | byte <<= 1; |
||
| 222 | } |
||
| 223 | src += srcskip; |
||
| 224 | dst += dstskip; |
||
| 225 | } |
||
| 226 | } else { |
||
| 227 | while ( height-- ) { |
||
| 228 | Uint8 byte = 0, bit; |
||
| 229 | for ( c=0; c |
||
| 230 | if ( (c&7) == 0 ) { |
||
| 231 | byte = *src++; |
||
| 232 | } |
||
| 233 | bit = (byte&0x80)>>7; |
||
| 234 | if ( bit != ckey ) { |
||
| 235 | *dst = bit; |
||
| 236 | } |
||
| 237 | dst++; |
||
| 238 | byte <<= 1; |
||
| 239 | } |
||
| 240 | src += srcskip; |
||
| 241 | dst += dstskip; |
||
| 242 | } |
||
| 243 | } |
||
| 244 | } |
||
| 245 | |||
| 246 | static void BlitBto2Key(SDL_BlitInfo *info) |
||
| 247 | { |
||
| 248 | int width = info->d_width; |
||
| 249 | int height = info->d_height; |
||
| 250 | Uint8 *src = info->s_pixels; |
||
| 251 | Uint16 *dstp = (Uint16 *)info->d_pixels; |
||
| 252 | int srcskip = info->s_skip; |
||
| 253 | int dstskip = info->d_skip; |
||
| 254 | Uint32 ckey = info->src->colorkey; |
||
| 255 | Uint8 *palmap = info->table; |
||
| 256 | int c; |
||
| 257 | |||
| 258 | /* Set up some basic variables */ |
||
| 259 | srcskip += width-(width+7)/8; |
||
| 260 | dstskip /= 2; |
||
| 261 | |||
| 262 | while ( height-- ) { |
||
| 263 | Uint8 byte = 0, bit; |
||
| 264 | for ( c=0; c |
||
| 265 | if ( (c&7) == 0 ) { |
||
| 266 | byte = *src++; |
||
| 267 | } |
||
| 268 | bit = (byte&0x80)>>7; |
||
| 269 | if ( bit != ckey ) { |
||
| 270 | *dstp=((Uint16 *)palmap)[bit]; |
||
| 271 | } |
||
| 272 | byte <<= 1; |
||
| 273 | dstp++; |
||
| 274 | } |
||
| 275 | src += srcskip; |
||
| 276 | dstp += dstskip; |
||
| 277 | } |
||
| 278 | } |
||
| 279 | |||
| 280 | static void BlitBto3Key(SDL_BlitInfo *info) |
||
| 281 | { |
||
| 282 | int width = info->d_width; |
||
| 283 | int height = info->d_height; |
||
| 284 | Uint8 *src = info->s_pixels; |
||
| 285 | Uint8 *dst = info->d_pixels; |
||
| 286 | int srcskip = info->s_skip; |
||
| 287 | int dstskip = info->d_skip; |
||
| 288 | Uint32 ckey = info->src->colorkey; |
||
| 289 | Uint8 *palmap = info->table; |
||
| 290 | int c; |
||
| 291 | |||
| 292 | /* Set up some basic variables */ |
||
| 293 | srcskip += width-(width+7)/8; |
||
| 294 | |||
| 295 | while ( height-- ) { |
||
| 296 | Uint8 byte = 0, bit; |
||
| 297 | for ( c=0; c |
||
| 298 | if ( (c&7) == 0 ) { |
||
| 299 | byte = *src++; |
||
| 300 | } |
||
| 301 | bit = (byte&0x80)>>7; |
||
| 302 | if ( bit != ckey ) { |
||
| 303 | memcpy(dst, &palmap[bit*4], 3); |
||
| 304 | } |
||
| 305 | byte <<= 1; |
||
| 306 | dst += 3; |
||
| 307 | } |
||
| 308 | src += srcskip; |
||
| 309 | dst += dstskip; |
||
| 310 | } |
||
| 311 | } |
||
| 312 | |||
| 313 | static void BlitBto4Key(SDL_BlitInfo *info) |
||
| 314 | { |
||
| 315 | int width = info->d_width; |
||
| 316 | int height = info->d_height; |
||
| 317 | Uint8 *src = info->s_pixels; |
||
| 318 | Uint32 *dstp = (Uint32 *)info->d_pixels; |
||
| 319 | int srcskip = info->s_skip; |
||
| 320 | int dstskip = info->d_skip; |
||
| 321 | Uint32 ckey = info->src->colorkey; |
||
| 322 | Uint8 *palmap = info->table; |
||
| 323 | int c; |
||
| 324 | |||
| 325 | /* Set up some basic variables */ |
||
| 326 | srcskip += width-(width+7)/8; |
||
| 327 | dstskip /= 4; |
||
| 328 | |||
| 329 | while ( height-- ) { |
||
| 330 | Uint8 byte = 0, bit; |
||
| 331 | for ( c=0; c |
||
| 332 | if ( (c&7) == 0 ) { |
||
| 333 | byte = *src++; |
||
| 334 | } |
||
| 335 | bit = (byte&0x80)>>7; |
||
| 336 | if ( bit != ckey ) { |
||
| 337 | *dstp=((Uint32 *)palmap)[bit]; |
||
| 338 | } |
||
| 339 | byte <<= 1; |
||
| 340 | dstp++; |
||
| 341 | } |
||
| 342 | src += srcskip; |
||
| 343 | dstp += dstskip; |
||
| 344 | } |
||
| 345 | } |
||
| 346 | |||
| 347 | static void BlitBtoNAlpha(SDL_BlitInfo *info) |
||
| 348 | { |
||
| 349 | int width = info->d_width; |
||
| 350 | int height = info->d_height; |
||
| 351 | Uint8 *src = info->s_pixels; |
||
| 352 | Uint8 *dst = info->d_pixels; |
||
| 353 | int srcskip = info->s_skip; |
||
| 354 | int dstskip = info->d_skip; |
||
| 355 | const SDL_Color *srcpal = info->src->palette->colors; |
||
| 356 | SDL_PixelFormat *dstfmt = info->dst; |
||
| 357 | int dstbpp; |
||
| 358 | int c; |
||
| 359 | const int A = info->src->alpha; |
||
| 360 | |||
| 361 | /* Set up some basic variables */ |
||
| 362 | dstbpp = dstfmt->BytesPerPixel; |
||
| 363 | srcskip += width-(width+7)/8; |
||
| 364 | |||
| 365 | while ( height-- ) { |
||
| 366 | Uint8 byte = 0, bit; |
||
| 367 | for ( c=0; c |
||
| 368 | if ( (c&7) == 0 ) { |
||
| 369 | byte = *src++; |
||
| 370 | } |
||
| 371 | bit = (byte&0x80)>>7; |
||
| 372 | if ( 1 ) { |
||
| 373 | Uint32 pixel; |
||
| 374 | unsigned sR, sG, sB; |
||
| 375 | unsigned dR, dG, dB; |
||
| 376 | sR = srcpal[bit].r; |
||
| 377 | sG = srcpal[bit].g; |
||
| 378 | sB = srcpal[bit].b; |
||
| 379 | DISEMBLE_RGB(dst, dstbpp, dstfmt, |
||
| 380 | pixel, dR, dG, dB); |
||
| 381 | ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB); |
||
| 382 | ASSEMBLE_RGB(dst, dstbpp, dstfmt, dR, dG, dB); |
||
| 383 | } |
||
| 384 | byte <<= 1; |
||
| 385 | dst += dstbpp; |
||
| 386 | } |
||
| 387 | src += srcskip; |
||
| 388 | dst += dstskip; |
||
| 389 | } |
||
| 390 | } |
||
| 391 | |||
| 392 | static void BlitBtoNAlphaKey(SDL_BlitInfo *info) |
||
| 393 | { |
||
| 394 | int width = info->d_width; |
||
| 395 | int height = info->d_height; |
||
| 396 | Uint8 *src = info->s_pixels; |
||
| 397 | Uint8 *dst = info->d_pixels; |
||
| 398 | int srcskip = info->s_skip; |
||
| 399 | int dstskip = info->d_skip; |
||
| 400 | SDL_PixelFormat *srcfmt = info->src; |
||
| 401 | SDL_PixelFormat *dstfmt = info->dst; |
||
| 402 | const SDL_Color *srcpal = srcfmt->palette->colors; |
||
| 403 | int dstbpp; |
||
| 404 | int c; |
||
| 405 | const int A = srcfmt->alpha; |
||
| 406 | Uint32 ckey = srcfmt->colorkey; |
||
| 407 | |||
| 408 | /* Set up some basic variables */ |
||
| 409 | dstbpp = dstfmt->BytesPerPixel; |
||
| 410 | srcskip += width-(width+7)/8; |
||
| 411 | |||
| 412 | while ( height-- ) { |
||
| 413 | Uint8 byte = 0, bit; |
||
| 414 | for ( c=0; c |
||
| 415 | if ( (c&7) == 0 ) { |
||
| 416 | byte = *src++; |
||
| 417 | } |
||
| 418 | bit = (byte&0x80)>>7; |
||
| 419 | if ( bit != ckey ) { |
||
| 420 | int sR, sG, sB; |
||
| 421 | int dR, dG, dB; |
||
| 422 | Uint32 pixel; |
||
| 423 | sR = srcpal[bit].r; |
||
| 424 | sG = srcpal[bit].g; |
||
| 425 | sB = srcpal[bit].b; |
||
| 426 | DISEMBLE_RGB(dst, dstbpp, dstfmt, |
||
| 427 | pixel, dR, dG, dB); |
||
| 428 | ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB); |
||
| 429 | ASSEMBLE_RGB(dst, dstbpp, dstfmt, dR, dG, dB); |
||
| 430 | } |
||
| 431 | byte <<= 1; |
||
| 432 | dst += dstbpp; |
||
| 433 | } |
||
| 434 | src += srcskip; |
||
| 435 | dst += dstskip; |
||
| 436 | } |
||
| 437 | } |
||
| 438 | |||
| 439 | static SDL_loblit bitmap_blit[] = { |
||
| 440 | NULL, BlitBto1, BlitBto2, BlitBto3, BlitBto4 |
||
| 441 | }; |
||
| 442 | |||
| 443 | static SDL_loblit colorkey_blit[] = { |
||
| 444 | NULL, BlitBto1Key, BlitBto2Key, BlitBto3Key, BlitBto4Key |
||
| 445 | }; |
||
| 446 | |||
| 447 | SDL_loblit SDL_CalculateBlit0(SDL_Surface *surface, int blit_index) |
||
| 448 | { |
||
| 449 | int which; |
||
| 450 | |||
| 451 | if ( surface->map->dst->format->BitsPerPixel < 8 ) { |
||
| 452 | which = 0; |
||
| 453 | } else { |
||
| 454 | which = surface->map->dst->format->BytesPerPixel; |
||
| 455 | } |
||
| 456 | switch(blit_index) { |
||
| 457 | case 0: /* copy */ |
||
| 458 | return bitmap_blit[which]; |
||
| 459 | |||
| 460 | case 1: /* colorkey */ |
||
| 461 | return colorkey_blit[which]; |
||
| 462 | |||
| 463 | case 2: /* alpha */ |
||
| 464 | return which >= 2 ? BlitBtoNAlpha : NULL; |
||
| 465 | |||
| 466 | case 4: /* alpha + colorkey */ |
||
| 467 | return which >= 2 ? BlitBtoNAlphaKey : NULL; |
||
| 468 | } |
||
| 469 | return NULL; |
||
| 470 | } |
||
| 471 |