Mercurial > sdl-ios-xcode
annotate src/video/SDL_blit_0.c @ 1336:3692456e7b0f
Use SDL_ prefixed versions of C library functions.
FIXME:
Change #include <stdlib.h> to #include "SDL_stdlib.h"
Change #include <string.h> to #include "SDL_string.h"
Make sure nothing else broke because of this...
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 07 Feb 2006 06:59:48 +0000 |
| parents | 450721ad5436 |
| children | c71e05b4dc2e |
| 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 */ |
| 22 | |
| 23 #include "SDL_types.h" | |
| 24 #include "SDL_video.h" | |
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25 #include "SDL_string.h" |
| 0 | 26 #include "SDL_blit.h" |
| 27 | |
| 28 /* Functions to blit from bitmaps to other surfaces */ | |
| 29 | |
| 30 static void BlitBto1(SDL_BlitInfo *info) | |
| 31 { | |
| 32 int c; | |
| 33 int width, height; | |
| 34 Uint8 *src, *map, *dst; | |
| 35 int srcskip, dstskip; | |
| 36 | |
| 37 /* Set up some basic variables */ | |
| 38 width = info->d_width; | |
| 39 height = info->d_height; | |
| 40 src = info->s_pixels; | |
| 41 srcskip = info->s_skip; | |
| 42 dst = info->d_pixels; | |
| 43 dstskip = info->d_skip; | |
| 44 map = info->table; | |
| 45 srcskip += width-(width+7)/8; | |
| 46 | |
| 47 if ( map ) { | |
| 48 while ( height-- ) { | |
| 49 Uint8 byte = 0, bit; | |
| 50 for ( c=0; c<width; ++c ) { | |
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51 if ( (c&7) == 0 ) { |
| 0 | 52 byte = *src++; |
| 53 } | |
| 54 bit = (byte&0x80)>>7; | |
| 55 if ( 1 ) { | |
| 56 *dst = map[bit]; | |
| 57 } | |
| 58 dst++; | |
| 59 byte <<= 1; | |
| 60 } | |
| 61 src += srcskip; | |
| 62 dst += dstskip; | |
| 63 } | |
| 64 } else { | |
| 65 while ( height-- ) { | |
| 66 Uint8 byte = 0, bit; | |
| 67 for ( c=0; c<width; ++c ) { | |
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68 if ( (c&7) == 0 ) { |
| 0 | 69 byte = *src++; |
| 70 } | |
| 71 bit = (byte&0x80)>>7; | |
| 72 if ( 1 ) { | |
| 73 *dst = bit; | |
| 74 } | |
| 75 dst++; | |
| 76 byte <<= 1; | |
| 77 } | |
| 78 src += srcskip; | |
| 79 dst += dstskip; | |
| 80 } | |
| 81 } | |
| 82 } | |
| 83 static void BlitBto2(SDL_BlitInfo *info) | |
| 84 { | |
| 85 int c; | |
| 86 int width, height; | |
| 87 Uint8 *src; | |
| 88 Uint16 *map, *dst; | |
| 89 int srcskip, dstskip; | |
| 90 | |
| 91 /* Set up some basic variables */ | |
| 92 width = info->d_width; | |
| 93 height = info->d_height; | |
| 94 src = info->s_pixels; | |
| 95 srcskip = info->s_skip; | |
| 96 dst = (Uint16 *)info->d_pixels; | |
| 97 dstskip = info->d_skip/2; | |
| 98 map = (Uint16 *)info->table; | |
| 99 srcskip += width-(width+7)/8; | |
| 100 | |
| 101 while ( height-- ) { | |
| 102 Uint8 byte = 0, bit; | |
| 103 for ( c=0; c<width; ++c ) { | |
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104 if ( (c&7) == 0 ) { |
| 0 | 105 byte = *src++; |
| 106 } | |
| 107 bit = (byte&0x80)>>7; | |
| 108 if ( 1 ) { | |
| 109 *dst = map[bit]; | |
| 110 } | |
| 111 byte <<= 1; | |
| 112 dst++; | |
| 113 } | |
| 114 src += srcskip; | |
| 115 dst += dstskip; | |
| 116 } | |
| 117 } | |
| 118 static void BlitBto3(SDL_BlitInfo *info) | |
| 119 { | |
| 120 int c, o; | |
| 121 int width, height; | |
| 122 Uint8 *src, *map, *dst; | |
| 123 int srcskip, dstskip; | |
| 124 | |
| 125 /* Set up some basic variables */ | |
| 126 width = info->d_width; | |
| 127 height = info->d_height; | |
| 128 src = info->s_pixels; | |
| 129 srcskip = info->s_skip; | |
| 130 dst = info->d_pixels; | |
| 131 dstskip = info->d_skip; | |
| 132 map = info->table; | |
| 133 srcskip += width-(width+7)/8; | |
| 134 | |
| 135 while ( height-- ) { | |
| 136 Uint8 byte = 0, bit; | |
| 137 for ( c=0; c<width; ++c ) { | |
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138 if ( (c&7) == 0 ) { |
| 0 | 139 byte = *src++; |
| 140 } | |
| 141 bit = (byte&0x80)>>7; | |
| 142 if ( 1 ) { | |
| 143 o = bit * 4; | |
| 144 dst[0] = map[o++]; | |
| 145 dst[1] = map[o++]; | |
| 146 dst[2] = map[o++]; | |
| 147 } | |
| 148 byte <<= 1; | |
| 149 dst += 3; | |
| 150 } | |
| 151 src += srcskip; | |
| 152 dst += dstskip; | |
| 153 } | |
| 154 } | |
| 155 static void BlitBto4(SDL_BlitInfo *info) | |
| 156 { | |
| 157 int width, height; | |
| 158 Uint8 *src; | |
| 159 Uint32 *map, *dst; | |
| 160 int srcskip, dstskip; | |
| 161 int c; | |
| 162 | |
| 163 /* Set up some basic variables */ | |
| 164 width = info->d_width; | |
| 165 height = info->d_height; | |
| 166 src = info->s_pixels; | |
| 167 srcskip = info->s_skip; | |
| 168 dst = (Uint32 *)info->d_pixels; | |
| 169 dstskip = info->d_skip/4; | |
| 170 map = (Uint32 *)info->table; | |
| 171 srcskip += width-(width+7)/8; | |
| 172 | |
| 173 while ( height-- ) { | |
| 174 Uint8 byte = 0, bit; | |
| 175 for ( c=0; c<width; ++c ) { | |
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176 if ( (c&7) == 0 ) { |
| 0 | 177 byte = *src++; |
| 178 } | |
| 179 bit = (byte&0x80)>>7; | |
| 180 if ( 1 ) { | |
| 181 *dst = map[bit]; | |
| 182 } | |
| 183 byte <<= 1; | |
| 184 dst++; | |
| 185 } | |
| 186 src += srcskip; | |
| 187 dst += dstskip; | |
| 188 } | |
| 189 } | |
| 190 | |
| 191 static void BlitBto1Key(SDL_BlitInfo *info) | |
| 192 { | |
| 193 int width = info->d_width; | |
| 194 int height = info->d_height; | |
| 195 Uint8 *src = info->s_pixels; | |
| 196 Uint8 *dst = info->d_pixels; | |
| 197 int srcskip = info->s_skip; | |
| 198 int dstskip = info->d_skip; | |
| 199 Uint32 ckey = info->src->colorkey; | |
| 200 Uint8 *palmap = info->table; | |
| 201 int c; | |
| 202 | |
| 203 /* Set up some basic variables */ | |
| 204 srcskip += width-(width+7)/8; | |
| 205 | |
| 206 if ( palmap ) { | |
| 207 while ( height-- ) { | |
| 208 Uint8 byte = 0, bit; | |
| 209 for ( c=0; c<width; ++c ) { | |
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210 if ( (c&7) == 0 ) { |
| 0 | 211 byte = *src++; |
| 212 } | |
| 213 bit = (byte&0x80)>>7; | |
| 214 if ( bit != ckey ) { | |
| 215 *dst = palmap[bit]; | |
| 216 } | |
| 217 dst++; | |
| 218 byte <<= 1; | |
| 219 } | |
| 220 src += srcskip; | |
| 221 dst += dstskip; | |
| 222 } | |
| 223 } else { | |
| 224 while ( height-- ) { | |
| 225 Uint8 byte = 0, bit; | |
| 226 for ( c=0; c<width; ++c ) { | |
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227 if ( (c&7) == 0 ) { |
| 0 | 228 byte = *src++; |
| 229 } | |
| 230 bit = (byte&0x80)>>7; | |
| 231 if ( bit != ckey ) { | |
| 232 *dst = bit; | |
| 233 } | |
| 234 dst++; | |
| 235 byte <<= 1; | |
| 236 } | |
| 237 src += srcskip; | |
| 238 dst += dstskip; | |
| 239 } | |
| 240 } | |
| 241 } | |
| 242 | |
| 243 static void BlitBto2Key(SDL_BlitInfo *info) | |
| 244 { | |
| 245 int width = info->d_width; | |
| 246 int height = info->d_height; | |
| 247 Uint8 *src = info->s_pixels; | |
| 248 Uint16 *dstp = (Uint16 *)info->d_pixels; | |
| 249 int srcskip = info->s_skip; | |
| 250 int dstskip = info->d_skip; | |
| 251 Uint32 ckey = info->src->colorkey; | |
| 252 Uint8 *palmap = info->table; | |
| 253 int c; | |
| 254 | |
| 255 /* Set up some basic variables */ | |
| 256 srcskip += width-(width+7)/8; | |
| 257 dstskip /= 2; | |
| 258 | |
| 259 while ( height-- ) { | |
| 260 Uint8 byte = 0, bit; | |
| 261 for ( c=0; c<width; ++c ) { | |
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262 if ( (c&7) == 0 ) { |
| 0 | 263 byte = *src++; |
| 264 } | |
| 265 bit = (byte&0x80)>>7; | |
| 266 if ( bit != ckey ) { | |
| 267 *dstp=((Uint16 *)palmap)[bit]; | |
| 268 } | |
| 269 byte <<= 1; | |
| 270 dstp++; | |
| 271 } | |
| 272 src += srcskip; | |
| 273 dstp += dstskip; | |
| 274 } | |
| 275 } | |
| 276 | |
| 277 static void BlitBto3Key(SDL_BlitInfo *info) | |
| 278 { | |
| 279 int width = info->d_width; | |
| 280 int height = info->d_height; | |
| 281 Uint8 *src = info->s_pixels; | |
| 282 Uint8 *dst = info->d_pixels; | |
| 283 int srcskip = info->s_skip; | |
| 284 int dstskip = info->d_skip; | |
| 285 Uint32 ckey = info->src->colorkey; | |
| 286 Uint8 *palmap = info->table; | |
| 287 int c; | |
| 288 | |
| 289 /* Set up some basic variables */ | |
| 290 srcskip += width-(width+7)/8; | |
| 291 | |
| 292 while ( height-- ) { | |
| 293 Uint8 byte = 0, bit; | |
| 294 for ( c=0; c<width; ++c ) { | |
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295 if ( (c&7) == 0 ) { |
| 0 | 296 byte = *src++; |
| 297 } | |
| 298 bit = (byte&0x80)>>7; | |
| 299 if ( bit != ckey ) { | |
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300 SDL_memcpy(dst, &palmap[bit*4], 3); |
| 0 | 301 } |
| 302 byte <<= 1; | |
| 303 dst += 3; | |
| 304 } | |
| 305 src += srcskip; | |
| 306 dst += dstskip; | |
| 307 } | |
| 308 } | |
| 309 | |
| 310 static void BlitBto4Key(SDL_BlitInfo *info) | |
| 311 { | |
| 312 int width = info->d_width; | |
| 313 int height = info->d_height; | |
| 314 Uint8 *src = info->s_pixels; | |
| 315 Uint32 *dstp = (Uint32 *)info->d_pixels; | |
| 316 int srcskip = info->s_skip; | |
| 317 int dstskip = info->d_skip; | |
| 318 Uint32 ckey = info->src->colorkey; | |
| 319 Uint8 *palmap = info->table; | |
| 320 int c; | |
| 321 | |
| 322 /* Set up some basic variables */ | |
| 323 srcskip += width-(width+7)/8; | |
| 324 dstskip /= 4; | |
| 325 | |
| 326 while ( height-- ) { | |
| 327 Uint8 byte = 0, bit; | |
| 328 for ( c=0; c<width; ++c ) { | |
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329 if ( (c&7) == 0 ) { |
| 0 | 330 byte = *src++; |
| 331 } | |
| 332 bit = (byte&0x80)>>7; | |
| 333 if ( bit != ckey ) { | |
| 334 *dstp=((Uint32 *)palmap)[bit]; | |
| 335 } | |
| 336 byte <<= 1; | |
| 337 dstp++; | |
| 338 } | |
| 339 src += srcskip; | |
| 340 dstp += dstskip; | |
| 341 } | |
| 342 } | |
| 343 | |
| 344 static void BlitBtoNAlpha(SDL_BlitInfo *info) | |
| 345 { | |
| 346 int width = info->d_width; | |
| 347 int height = info->d_height; | |
| 348 Uint8 *src = info->s_pixels; | |
| 349 Uint8 *dst = info->d_pixels; | |
| 350 int srcskip = info->s_skip; | |
| 351 int dstskip = info->d_skip; | |
| 352 const SDL_Color *srcpal = info->src->palette->colors; | |
| 353 SDL_PixelFormat *dstfmt = info->dst; | |
| 354 int dstbpp; | |
| 355 int c; | |
| 356 const int A = info->src->alpha; | |
| 357 | |
| 358 /* Set up some basic variables */ | |
| 359 dstbpp = dstfmt->BytesPerPixel; | |
| 360 srcskip += width-(width+7)/8; | |
| 361 | |
| 362 while ( height-- ) { | |
| 363 Uint8 byte = 0, bit; | |
| 364 for ( c=0; c<width; ++c ) { | |
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365 if ( (c&7) == 0 ) { |
| 0 | 366 byte = *src++; |
| 367 } | |
| 368 bit = (byte&0x80)>>7; | |
| 369 if ( 1 ) { | |
| 370 Uint32 pixel; | |
| 371 unsigned sR, sG, sB; | |
| 372 unsigned dR, dG, dB; | |
| 373 sR = srcpal[bit].r; | |
| 374 sG = srcpal[bit].g; | |
| 375 sB = srcpal[bit].b; | |
| 376 DISEMBLE_RGB(dst, dstbpp, dstfmt, | |
| 377 pixel, dR, dG, dB); | |
| 378 ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB); | |
| 379 ASSEMBLE_RGB(dst, dstbpp, dstfmt, dR, dG, dB); | |
| 380 } | |
| 381 byte <<= 1; | |
| 382 dst += dstbpp; | |
| 383 } | |
| 384 src += srcskip; | |
| 385 dst += dstskip; | |
| 386 } | |
| 387 } | |
| 388 | |
| 389 static void BlitBtoNAlphaKey(SDL_BlitInfo *info) | |
| 390 { | |
| 391 int width = info->d_width; | |
| 392 int height = info->d_height; | |
| 393 Uint8 *src = info->s_pixels; | |
| 394 Uint8 *dst = info->d_pixels; | |
| 395 int srcskip = info->s_skip; | |
| 396 int dstskip = info->d_skip; | |
| 397 SDL_PixelFormat *srcfmt = info->src; | |
| 398 SDL_PixelFormat *dstfmt = info->dst; | |
| 399 const SDL_Color *srcpal = srcfmt->palette->colors; | |
| 400 int dstbpp; | |
| 401 int c; | |
| 402 const int A = srcfmt->alpha; | |
| 403 Uint32 ckey = srcfmt->colorkey; | |
| 404 | |
| 405 /* Set up some basic variables */ | |
| 406 dstbpp = dstfmt->BytesPerPixel; | |
| 407 srcskip += width-(width+7)/8; | |
| 408 | |
| 409 while ( height-- ) { | |
| 410 Uint8 byte = 0, bit; | |
| 411 for ( c=0; c<width; ++c ) { | |
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changeset
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412 if ( (c&7) == 0 ) { |
| 0 | 413 byte = *src++; |
| 414 } | |
| 415 bit = (byte&0x80)>>7; | |
| 416 if ( bit != ckey ) { | |
| 417 int sR, sG, sB; | |
| 418 int dR, dG, dB; | |
| 419 Uint32 pixel; | |
| 420 sR = srcpal[bit].r; | |
| 421 sG = srcpal[bit].g; | |
| 422 sB = srcpal[bit].b; | |
| 423 DISEMBLE_RGB(dst, dstbpp, dstfmt, | |
| 424 pixel, dR, dG, dB); | |
| 425 ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB); | |
| 426 ASSEMBLE_RGB(dst, dstbpp, dstfmt, dR, dG, dB); | |
| 427 } | |
| 428 byte <<= 1; | |
| 429 dst += dstbpp; | |
| 430 } | |
| 431 src += srcskip; | |
| 432 dst += dstskip; | |
| 433 } | |
| 434 } | |
| 435 | |
| 436 static SDL_loblit bitmap_blit[] = { | |
| 437 NULL, BlitBto1, BlitBto2, BlitBto3, BlitBto4 | |
| 438 }; | |
| 439 | |
| 440 static SDL_loblit colorkey_blit[] = { | |
| 441 NULL, BlitBto1Key, BlitBto2Key, BlitBto3Key, BlitBto4Key | |
| 442 }; | |
| 443 | |
| 444 SDL_loblit SDL_CalculateBlit0(SDL_Surface *surface, int blit_index) | |
| 445 { | |
| 446 int which; | |
| 447 | |
| 1058 | 448 if ( surface->format->BitsPerPixel != 1 ) { |
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449 /* We don't support sub 8-bit packed pixel modes */ |
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450 return NULL; |
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451 } |
| 0 | 452 if ( surface->map->dst->format->BitsPerPixel < 8 ) { |
| 453 which = 0; | |
| 454 } else { | |
| 455 which = surface->map->dst->format->BytesPerPixel; | |
| 456 } | |
| 457 switch(blit_index) { | |
| 458 case 0: /* copy */ | |
| 459 return bitmap_blit[which]; | |
| 460 | |
| 461 case 1: /* colorkey */ | |
| 462 return colorkey_blit[which]; | |
| 463 | |
| 464 case 2: /* alpha */ | |
| 465 return which >= 2 ? BlitBtoNAlpha : NULL; | |
| 466 | |
| 467 case 4: /* alpha + colorkey */ | |
| 468 return which >= 2 ? BlitBtoNAlphaKey : NULL; | |
| 469 } | |
| 470 return NULL; | |
| 471 } | |
| 472 |