Mercurial > sdl-ios-xcode
annotate src/video/SDL_blit_0.c @ 1312:c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
I batch edited these files, so please let me know if I've accidentally removed anybody's
credit here.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Wed, 01 Feb 2006 06:32:25 +0000 |
| parents | e6c91fd1911e |
| children | 450721ad5436 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
1312
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Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
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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 | |
|
1312
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Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
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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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1312
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Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
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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 | |
|
1312
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Sam Lantinga <slouken@libsdl.org>
parents:
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13 Lesser General Public License for more details. |
| 0 | 14 |
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1312
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Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
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15 You should have received a copy of the GNU Lesser General Public |
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c9b51268668f
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Sam Lantinga <slouken@libsdl.org>
parents:
1058
diff
changeset
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16 License along with this library; if not, write to the Free Software |
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c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
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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 <stdio.h> | |
| 24 #include <string.h> | |
| 25 | |
| 26 #include "SDL_types.h" | |
| 27 #include "SDL_video.h" | |
| 28 #include "SDL_blit.h" | |
| 29 | |
| 30 /* Functions to blit from bitmaps to other surfaces */ | |
| 31 | |
| 32 static void BlitBto1(SDL_BlitInfo *info) | |
| 33 { | |
| 34 int c; | |
| 35 int width, height; | |
| 36 Uint8 *src, *map, *dst; | |
| 37 int srcskip, dstskip; | |
| 38 | |
| 39 /* Set up some basic variables */ | |
| 40 width = info->d_width; | |
| 41 height = info->d_height; | |
| 42 src = info->s_pixels; | |
| 43 srcskip = info->s_skip; | |
| 44 dst = info->d_pixels; | |
| 45 dstskip = info->d_skip; | |
| 46 map = info->table; | |
| 47 srcskip += width-(width+7)/8; | |
| 48 | |
| 49 if ( map ) { | |
| 50 while ( height-- ) { | |
| 51 Uint8 byte = 0, bit; | |
| 52 for ( c=0; c<width; ++c ) { | |
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Sam Lantinga <slouken@lokigames.com>
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53 if ( (c&7) == 0 ) { |
| 0 | 54 byte = *src++; |
| 55 } | |
| 56 bit = (byte&0x80)>>7; | |
| 57 if ( 1 ) { | |
| 58 *dst = map[bit]; | |
| 59 } | |
| 60 dst++; | |
| 61 byte <<= 1; | |
| 62 } | |
| 63 src += srcskip; | |
| 64 dst += dstskip; | |
| 65 } | |
| 66 } else { | |
| 67 while ( height-- ) { | |
| 68 Uint8 byte = 0, bit; | |
| 69 for ( c=0; c<width; ++c ) { | |
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Sam Lantinga <slouken@lokigames.com>
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70 if ( (c&7) == 0 ) { |
| 0 | 71 byte = *src++; |
| 72 } | |
| 73 bit = (byte&0x80)>>7; | |
| 74 if ( 1 ) { | |
| 75 *dst = bit; | |
| 76 } | |
| 77 dst++; | |
| 78 byte <<= 1; | |
| 79 } | |
| 80 src += srcskip; | |
| 81 dst += dstskip; | |
| 82 } | |
| 83 } | |
| 84 } | |
| 85 static void BlitBto2(SDL_BlitInfo *info) | |
| 86 { | |
| 87 int c; | |
| 88 int width, height; | |
| 89 Uint8 *src; | |
| 90 Uint16 *map, *dst; | |
| 91 int srcskip, dstskip; | |
| 92 | |
| 93 /* Set up some basic variables */ | |
| 94 width = info->d_width; | |
| 95 height = info->d_height; | |
| 96 src = info->s_pixels; | |
| 97 srcskip = info->s_skip; | |
| 98 dst = (Uint16 *)info->d_pixels; | |
| 99 dstskip = info->d_skip/2; | |
| 100 map = (Uint16 *)info->table; | |
| 101 srcskip += width-(width+7)/8; | |
| 102 | |
| 103 while ( height-- ) { | |
| 104 Uint8 byte = 0, bit; | |
| 105 for ( c=0; c<width; ++c ) { | |
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parents:
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changeset
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106 if ( (c&7) == 0 ) { |
| 0 | 107 byte = *src++; |
| 108 } | |
| 109 bit = (byte&0x80)>>7; | |
| 110 if ( 1 ) { | |
| 111 *dst = map[bit]; | |
| 112 } | |
| 113 byte <<= 1; | |
| 114 dst++; | |
| 115 } | |
| 116 src += srcskip; | |
| 117 dst += dstskip; | |
| 118 } | |
| 119 } | |
| 120 static void BlitBto3(SDL_BlitInfo *info) | |
| 121 { | |
| 122 int c, o; | |
| 123 int width, height; | |
| 124 Uint8 *src, *map, *dst; | |
| 125 int srcskip, dstskip; | |
| 126 | |
| 127 /* Set up some basic variables */ | |
| 128 width = info->d_width; | |
| 129 height = info->d_height; | |
| 130 src = info->s_pixels; | |
| 131 srcskip = info->s_skip; | |
| 132 dst = info->d_pixels; | |
| 133 dstskip = info->d_skip; | |
| 134 map = info->table; | |
| 135 srcskip += width-(width+7)/8; | |
| 136 | |
| 137 while ( height-- ) { | |
| 138 Uint8 byte = 0, bit; | |
| 139 for ( c=0; c<width; ++c ) { | |
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Sam Lantinga <slouken@lokigames.com>
parents:
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diff
changeset
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140 if ( (c&7) == 0 ) { |
| 0 | 141 byte = *src++; |
| 142 } | |
| 143 bit = (byte&0x80)>>7; | |
| 144 if ( 1 ) { | |
| 145 o = bit * 4; | |
| 146 dst[0] = map[o++]; | |
| 147 dst[1] = map[o++]; | |
| 148 dst[2] = map[o++]; | |
| 149 } | |
| 150 byte <<= 1; | |
| 151 dst += 3; | |
| 152 } | |
| 153 src += srcskip; | |
| 154 dst += dstskip; | |
| 155 } | |
| 156 } | |
| 157 static void BlitBto4(SDL_BlitInfo *info) | |
| 158 { | |
| 159 int width, height; | |
| 160 Uint8 *src; | |
| 161 Uint32 *map, *dst; | |
| 162 int srcskip, dstskip; | |
| 163 int c; | |
| 164 | |
| 165 /* Set up some basic variables */ | |
| 166 width = info->d_width; | |
| 167 height = info->d_height; | |
| 168 src = info->s_pixels; | |
| 169 srcskip = info->s_skip; | |
| 170 dst = (Uint32 *)info->d_pixels; | |
| 171 dstskip = info->d_skip/4; | |
| 172 map = (Uint32 *)info->table; | |
| 173 srcskip += width-(width+7)/8; | |
| 174 | |
| 175 while ( height-- ) { | |
| 176 Uint8 byte = 0, bit; | |
| 177 for ( c=0; c<width; ++c ) { | |
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91
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From: "Markus F.X.J. Oberhumer"
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
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178 if ( (c&7) == 0 ) { |
| 0 | 179 byte = *src++; |
| 180 } | |
| 181 bit = (byte&0x80)>>7; | |
| 182 if ( 1 ) { | |
| 183 *dst = map[bit]; | |
| 184 } | |
| 185 byte <<= 1; | |
| 186 dst++; | |
| 187 } | |
| 188 src += srcskip; | |
| 189 dst += dstskip; | |
| 190 } | |
| 191 } | |
| 192 | |
| 193 static void BlitBto1Key(SDL_BlitInfo *info) | |
| 194 { | |
| 195 int width = info->d_width; | |
| 196 int height = info->d_height; | |
| 197 Uint8 *src = info->s_pixels; | |
| 198 Uint8 *dst = info->d_pixels; | |
| 199 int srcskip = info->s_skip; | |
| 200 int dstskip = info->d_skip; | |
| 201 Uint32 ckey = info->src->colorkey; | |
| 202 Uint8 *palmap = info->table; | |
| 203 int c; | |
| 204 | |
| 205 /* Set up some basic variables */ | |
| 206 srcskip += width-(width+7)/8; | |
| 207 | |
| 208 if ( palmap ) { | |
| 209 while ( height-- ) { | |
| 210 Uint8 byte = 0, bit; | |
| 211 for ( c=0; c<width; ++c ) { | |
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91
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From: "Markus F.X.J. Oberhumer"
Sam Lantinga <slouken@lokigames.com>
parents:
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diff
changeset
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212 if ( (c&7) == 0 ) { |
| 0 | 213 byte = *src++; |
| 214 } | |
| 215 bit = (byte&0x80)>>7; | |
| 216 if ( bit != ckey ) { | |
| 217 *dst = palmap[bit]; | |
| 218 } | |
| 219 dst++; | |
| 220 byte <<= 1; | |
| 221 } | |
| 222 src += srcskip; | |
| 223 dst += dstskip; | |
| 224 } | |
| 225 } else { | |
| 226 while ( height-- ) { | |
| 227 Uint8 byte = 0, bit; | |
| 228 for ( c=0; c<width; ++c ) { | |
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91
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From: "Markus F.X.J. Oberhumer"
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
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229 if ( (c&7) == 0 ) { |
| 0 | 230 byte = *src++; |
| 231 } | |
| 232 bit = (byte&0x80)>>7; | |
| 233 if ( bit != ckey ) { | |
| 234 *dst = bit; | |
| 235 } | |
| 236 dst++; | |
| 237 byte <<= 1; | |
| 238 } | |
| 239 src += srcskip; | |
| 240 dst += dstskip; | |
| 241 } | |
| 242 } | |
| 243 } | |
| 244 | |
| 245 static void BlitBto2Key(SDL_BlitInfo *info) | |
| 246 { | |
| 247 int width = info->d_width; | |
| 248 int height = info->d_height; | |
| 249 Uint8 *src = info->s_pixels; | |
| 250 Uint16 *dstp = (Uint16 *)info->d_pixels; | |
| 251 int srcskip = info->s_skip; | |
| 252 int dstskip = info->d_skip; | |
| 253 Uint32 ckey = info->src->colorkey; | |
| 254 Uint8 *palmap = info->table; | |
| 255 int c; | |
| 256 | |
| 257 /* Set up some basic variables */ | |
| 258 srcskip += width-(width+7)/8; | |
| 259 dstskip /= 2; | |
| 260 | |
| 261 while ( height-- ) { | |
| 262 Uint8 byte = 0, bit; | |
| 263 for ( c=0; c<width; ++c ) { | |
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91
e85e03f195b4
From: "Markus F.X.J. Oberhumer"
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
264 if ( (c&7) == 0 ) { |
| 0 | 265 byte = *src++; |
| 266 } | |
| 267 bit = (byte&0x80)>>7; | |
| 268 if ( bit != ckey ) { | |
| 269 *dstp=((Uint16 *)palmap)[bit]; | |
| 270 } | |
| 271 byte <<= 1; | |
| 272 dstp++; | |
| 273 } | |
| 274 src += srcskip; | |
| 275 dstp += dstskip; | |
| 276 } | |
| 277 } | |
| 278 | |
| 279 static void BlitBto3Key(SDL_BlitInfo *info) | |
| 280 { | |
| 281 int width = info->d_width; | |
| 282 int height = info->d_height; | |
| 283 Uint8 *src = info->s_pixels; | |
| 284 Uint8 *dst = info->d_pixels; | |
| 285 int srcskip = info->s_skip; | |
| 286 int dstskip = info->d_skip; | |
| 287 Uint32 ckey = info->src->colorkey; | |
| 288 Uint8 *palmap = info->table; | |
| 289 int c; | |
| 290 | |
| 291 /* Set up some basic variables */ | |
| 292 srcskip += width-(width+7)/8; | |
| 293 | |
| 294 while ( height-- ) { | |
| 295 Uint8 byte = 0, bit; | |
| 296 for ( c=0; c<width; ++c ) { | |
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Sam Lantinga <slouken@lokigames.com>
parents:
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diff
changeset
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297 if ( (c&7) == 0 ) { |
| 0 | 298 byte = *src++; |
| 299 } | |
| 300 bit = (byte&0x80)>>7; | |
| 301 if ( bit != ckey ) { | |
| 302 memcpy(dst, &palmap[bit*4], 3); | |
| 303 } | |
| 304 byte <<= 1; | |
| 305 dst += 3; | |
| 306 } | |
| 307 src += srcskip; | |
| 308 dst += dstskip; | |
| 309 } | |
| 310 } | |
| 311 | |
| 312 static void BlitBto4Key(SDL_BlitInfo *info) | |
| 313 { | |
| 314 int width = info->d_width; | |
| 315 int height = info->d_height; | |
| 316 Uint8 *src = info->s_pixels; | |
| 317 Uint32 *dstp = (Uint32 *)info->d_pixels; | |
| 318 int srcskip = info->s_skip; | |
| 319 int dstskip = info->d_skip; | |
| 320 Uint32 ckey = info->src->colorkey; | |
| 321 Uint8 *palmap = info->table; | |
| 322 int c; | |
| 323 | |
| 324 /* Set up some basic variables */ | |
| 325 srcskip += width-(width+7)/8; | |
| 326 dstskip /= 4; | |
| 327 | |
| 328 while ( height-- ) { | |
| 329 Uint8 byte = 0, bit; | |
| 330 for ( c=0; c<width; ++c ) { | |
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91
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From: "Markus F.X.J. Oberhumer"
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
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331 if ( (c&7) == 0 ) { |
| 0 | 332 byte = *src++; |
| 333 } | |
| 334 bit = (byte&0x80)>>7; | |
| 335 if ( bit != ckey ) { | |
| 336 *dstp=((Uint32 *)palmap)[bit]; | |
| 337 } | |
| 338 byte <<= 1; | |
| 339 dstp++; | |
| 340 } | |
| 341 src += srcskip; | |
| 342 dstp += dstskip; | |
| 343 } | |
| 344 } | |
| 345 | |
| 346 static void BlitBtoNAlpha(SDL_BlitInfo *info) | |
| 347 { | |
| 348 int width = info->d_width; | |
| 349 int height = info->d_height; | |
| 350 Uint8 *src = info->s_pixels; | |
| 351 Uint8 *dst = info->d_pixels; | |
| 352 int srcskip = info->s_skip; | |
| 353 int dstskip = info->d_skip; | |
| 354 const SDL_Color *srcpal = info->src->palette->colors; | |
| 355 SDL_PixelFormat *dstfmt = info->dst; | |
| 356 int dstbpp; | |
| 357 int c; | |
| 358 const int A = info->src->alpha; | |
| 359 | |
| 360 /* Set up some basic variables */ | |
| 361 dstbpp = dstfmt->BytesPerPixel; | |
| 362 srcskip += width-(width+7)/8; | |
| 363 | |
| 364 while ( height-- ) { | |
| 365 Uint8 byte = 0, bit; | |
| 366 for ( c=0; c<width; ++c ) { | |
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From: "Markus F.X.J. Oberhumer"
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
367 if ( (c&7) == 0 ) { |
| 0 | 368 byte = *src++; |
| 369 } | |
| 370 bit = (byte&0x80)>>7; | |
| 371 if ( 1 ) { | |
| 372 Uint32 pixel; | |
| 373 unsigned sR, sG, sB; | |
| 374 unsigned dR, dG, dB; | |
| 375 sR = srcpal[bit].r; | |
| 376 sG = srcpal[bit].g; | |
| 377 sB = srcpal[bit].b; | |
| 378 DISEMBLE_RGB(dst, dstbpp, dstfmt, | |
| 379 pixel, dR, dG, dB); | |
| 380 ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB); | |
| 381 ASSEMBLE_RGB(dst, dstbpp, dstfmt, dR, dG, dB); | |
| 382 } | |
| 383 byte <<= 1; | |
| 384 dst += dstbpp; | |
| 385 } | |
| 386 src += srcskip; | |
| 387 dst += dstskip; | |
| 388 } | |
| 389 } | |
| 390 | |
| 391 static void BlitBtoNAlphaKey(SDL_BlitInfo *info) | |
| 392 { | |
| 393 int width = info->d_width; | |
| 394 int height = info->d_height; | |
| 395 Uint8 *src = info->s_pixels; | |
| 396 Uint8 *dst = info->d_pixels; | |
| 397 int srcskip = info->s_skip; | |
| 398 int dstskip = info->d_skip; | |
| 399 SDL_PixelFormat *srcfmt = info->src; | |
| 400 SDL_PixelFormat *dstfmt = info->dst; | |
| 401 const SDL_Color *srcpal = srcfmt->palette->colors; | |
| 402 int dstbpp; | |
| 403 int c; | |
| 404 const int A = srcfmt->alpha; | |
| 405 Uint32 ckey = srcfmt->colorkey; | |
| 406 | |
| 407 /* Set up some basic variables */ | |
| 408 dstbpp = dstfmt->BytesPerPixel; | |
| 409 srcskip += width-(width+7)/8; | |
| 410 | |
| 411 while ( height-- ) { | |
| 412 Uint8 byte = 0, bit; | |
| 413 for ( c=0; c<width; ++c ) { | |
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91
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From: "Markus F.X.J. Oberhumer"
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
414 if ( (c&7) == 0 ) { |
| 0 | 415 byte = *src++; |
| 416 } | |
| 417 bit = (byte&0x80)>>7; | |
| 418 if ( bit != ckey ) { | |
| 419 int sR, sG, sB; | |
| 420 int dR, dG, dB; | |
| 421 Uint32 pixel; | |
| 422 sR = srcpal[bit].r; | |
| 423 sG = srcpal[bit].g; | |
| 424 sB = srcpal[bit].b; | |
| 425 DISEMBLE_RGB(dst, dstbpp, dstfmt, | |
| 426 pixel, dR, dG, dB); | |
| 427 ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB); | |
| 428 ASSEMBLE_RGB(dst, dstbpp, dstfmt, dR, dG, dB); | |
| 429 } | |
| 430 byte <<= 1; | |
| 431 dst += dstbpp; | |
| 432 } | |
| 433 src += srcskip; | |
| 434 dst += dstskip; | |
| 435 } | |
| 436 } | |
| 437 | |
| 438 static SDL_loblit bitmap_blit[] = { | |
| 439 NULL, BlitBto1, BlitBto2, BlitBto3, BlitBto4 | |
| 440 }; | |
| 441 | |
| 442 static SDL_loblit colorkey_blit[] = { | |
| 443 NULL, BlitBto1Key, BlitBto2Key, BlitBto3Key, BlitBto4Key | |
| 444 }; | |
| 445 | |
| 446 SDL_loblit SDL_CalculateBlit0(SDL_Surface *surface, int blit_index) | |
| 447 { | |
| 448 int which; | |
| 449 | |
| 1058 | 450 if ( surface->format->BitsPerPixel != 1 ) { |
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451 /* We don't support sub 8-bit packed pixel modes */ |
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Date: Mon, 02 May 2005 04:23:16 -0500
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452 return NULL; |
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e9d23bb80140
Date: Mon, 02 May 2005 04:23:16 -0500
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453 } |
| 0 | 454 if ( surface->map->dst->format->BitsPerPixel < 8 ) { |
| 455 which = 0; | |
| 456 } else { | |
| 457 which = surface->map->dst->format->BytesPerPixel; | |
| 458 } | |
| 459 switch(blit_index) { | |
| 460 case 0: /* copy */ | |
| 461 return bitmap_blit[which]; | |
| 462 | |
| 463 case 1: /* colorkey */ | |
| 464 return colorkey_blit[which]; | |
| 465 | |
| 466 case 2: /* alpha */ | |
| 467 return which >= 2 ? BlitBtoNAlpha : NULL; | |
| 468 | |
| 469 case 4: /* alpha + colorkey */ | |
| 470 return which >= 2 ? BlitBtoNAlphaKey : NULL; | |
| 471 } | |
| 472 return NULL; | |
| 473 } | |
| 474 |