Mercurial > sdl-ios-xcode
annotate src/video/SDL_blit_0.c @ 1358:c71e05b4dc2e
More header massaging... works great on Windows. ;-)
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Fri, 10 Feb 2006 06:48:43 +0000 |
| parents | 3692456e7b0f |
| children | d910939febfa |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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Updated copyright information and removed rcs id lines (problematic in branch merges)
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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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c9b51268668f
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16 License along with this library; if not, write to the Free Software |
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Updated copyright information and removed rcs id lines (problematic in branch merges)
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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_video.h" | |
| 24 #include "SDL_blit.h" | |
| 25 | |
| 26 /* Functions to blit from bitmaps to other surfaces */ | |
| 27 | |
| 28 static void BlitBto1(SDL_BlitInfo *info) | |
| 29 { | |
| 30 int c; | |
| 31 int width, height; | |
| 32 Uint8 *src, *map, *dst; | |
| 33 int srcskip, dstskip; | |
| 34 | |
| 35 /* Set up some basic variables */ | |
| 36 width = info->d_width; | |
| 37 height = info->d_height; | |
| 38 src = info->s_pixels; | |
| 39 srcskip = info->s_skip; | |
| 40 dst = info->d_pixels; | |
| 41 dstskip = info->d_skip; | |
| 42 map = info->table; | |
| 43 srcskip += width-(width+7)/8; | |
| 44 | |
| 45 if ( map ) { | |
| 46 while ( height-- ) { | |
| 47 Uint8 byte = 0, bit; | |
| 48 for ( c=0; c<width; ++c ) { | |
|
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From: "Markus F.X.J. Oberhumer"
Sam Lantinga <slouken@lokigames.com>
parents:
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changeset
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49 if ( (c&7) == 0 ) { |
| 0 | 50 byte = *src++; |
| 51 } | |
| 52 bit = (byte&0x80)>>7; | |
| 53 if ( 1 ) { | |
| 54 *dst = map[bit]; | |
| 55 } | |
| 56 dst++; | |
| 57 byte <<= 1; | |
| 58 } | |
| 59 src += srcskip; | |
| 60 dst += dstskip; | |
| 61 } | |
| 62 } else { | |
| 63 while ( height-- ) { | |
| 64 Uint8 byte = 0, bit; | |
| 65 for ( c=0; c<width; ++c ) { | |
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From: "Markus F.X.J. Oberhumer"
Sam Lantinga <slouken@lokigames.com>
parents:
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changeset
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66 if ( (c&7) == 0 ) { |
| 0 | 67 byte = *src++; |
| 68 } | |
| 69 bit = (byte&0x80)>>7; | |
| 70 if ( 1 ) { | |
| 71 *dst = bit; | |
| 72 } | |
| 73 dst++; | |
| 74 byte <<= 1; | |
| 75 } | |
| 76 src += srcskip; | |
| 77 dst += dstskip; | |
| 78 } | |
| 79 } | |
| 80 } | |
| 81 static void BlitBto2(SDL_BlitInfo *info) | |
| 82 { | |
| 83 int c; | |
| 84 int width, height; | |
| 85 Uint8 *src; | |
| 86 Uint16 *map, *dst; | |
| 87 int srcskip, dstskip; | |
| 88 | |
| 89 /* Set up some basic variables */ | |
| 90 width = info->d_width; | |
| 91 height = info->d_height; | |
| 92 src = info->s_pixels; | |
| 93 srcskip = info->s_skip; | |
| 94 dst = (Uint16 *)info->d_pixels; | |
| 95 dstskip = info->d_skip/2; | |
| 96 map = (Uint16 *)info->table; | |
| 97 srcskip += width-(width+7)/8; | |
| 98 | |
| 99 while ( height-- ) { | |
| 100 Uint8 byte = 0, bit; | |
| 101 for ( c=0; c<width; ++c ) { | |
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From: "Markus F.X.J. Oberhumer"
Sam Lantinga <slouken@lokigames.com>
parents:
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diff
changeset
|
102 if ( (c&7) == 0 ) { |
| 0 | 103 byte = *src++; |
| 104 } | |
| 105 bit = (byte&0x80)>>7; | |
| 106 if ( 1 ) { | |
| 107 *dst = map[bit]; | |
| 108 } | |
| 109 byte <<= 1; | |
| 110 dst++; | |
| 111 } | |
| 112 src += srcskip; | |
| 113 dst += dstskip; | |
| 114 } | |
| 115 } | |
| 116 static void BlitBto3(SDL_BlitInfo *info) | |
| 117 { | |
| 118 int c, o; | |
| 119 int width, height; | |
| 120 Uint8 *src, *map, *dst; | |
| 121 int srcskip, dstskip; | |
| 122 | |
| 123 /* Set up some basic variables */ | |
| 124 width = info->d_width; | |
| 125 height = info->d_height; | |
| 126 src = info->s_pixels; | |
| 127 srcskip = info->s_skip; | |
| 128 dst = info->d_pixels; | |
| 129 dstskip = info->d_skip; | |
| 130 map = info->table; | |
| 131 srcskip += width-(width+7)/8; | |
| 132 | |
| 133 while ( height-- ) { | |
| 134 Uint8 byte = 0, bit; | |
| 135 for ( c=0; c<width; ++c ) { | |
|
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From: "Markus F.X.J. Oberhumer"
Sam Lantinga <slouken@lokigames.com>
parents:
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diff
changeset
|
136 if ( (c&7) == 0 ) { |
| 0 | 137 byte = *src++; |
| 138 } | |
| 139 bit = (byte&0x80)>>7; | |
| 140 if ( 1 ) { | |
| 141 o = bit * 4; | |
| 142 dst[0] = map[o++]; | |
| 143 dst[1] = map[o++]; | |
| 144 dst[2] = map[o++]; | |
| 145 } | |
| 146 byte <<= 1; | |
| 147 dst += 3; | |
| 148 } | |
| 149 src += srcskip; | |
| 150 dst += dstskip; | |
| 151 } | |
| 152 } | |
| 153 static void BlitBto4(SDL_BlitInfo *info) | |
| 154 { | |
| 155 int width, height; | |
| 156 Uint8 *src; | |
| 157 Uint32 *map, *dst; | |
| 158 int srcskip, dstskip; | |
| 159 int c; | |
| 160 | |
| 161 /* Set up some basic variables */ | |
| 162 width = info->d_width; | |
| 163 height = info->d_height; | |
| 164 src = info->s_pixels; | |
| 165 srcskip = info->s_skip; | |
| 166 dst = (Uint32 *)info->d_pixels; | |
| 167 dstskip = info->d_skip/4; | |
| 168 map = (Uint32 *)info->table; | |
| 169 srcskip += width-(width+7)/8; | |
| 170 | |
| 171 while ( height-- ) { | |
| 172 Uint8 byte = 0, bit; | |
| 173 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
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174 if ( (c&7) == 0 ) { |
| 0 | 175 byte = *src++; |
| 176 } | |
| 177 bit = (byte&0x80)>>7; | |
| 178 if ( 1 ) { | |
| 179 *dst = map[bit]; | |
| 180 } | |
| 181 byte <<= 1; | |
| 182 dst++; | |
| 183 } | |
| 184 src += srcskip; | |
| 185 dst += dstskip; | |
| 186 } | |
| 187 } | |
| 188 | |
| 189 static void BlitBto1Key(SDL_BlitInfo *info) | |
| 190 { | |
| 191 int width = info->d_width; | |
| 192 int height = info->d_height; | |
| 193 Uint8 *src = info->s_pixels; | |
| 194 Uint8 *dst = info->d_pixels; | |
| 195 int srcskip = info->s_skip; | |
| 196 int dstskip = info->d_skip; | |
| 197 Uint32 ckey = info->src->colorkey; | |
| 198 Uint8 *palmap = info->table; | |
| 199 int c; | |
| 200 | |
| 201 /* Set up some basic variables */ | |
| 202 srcskip += width-(width+7)/8; | |
| 203 | |
| 204 if ( palmap ) { | |
| 205 while ( height-- ) { | |
| 206 Uint8 byte = 0, bit; | |
| 207 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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208 if ( (c&7) == 0 ) { |
| 0 | 209 byte = *src++; |
| 210 } | |
| 211 bit = (byte&0x80)>>7; | |
| 212 if ( bit != ckey ) { | |
| 213 *dst = palmap[bit]; | |
| 214 } | |
| 215 dst++; | |
| 216 byte <<= 1; | |
| 217 } | |
| 218 src += srcskip; | |
| 219 dst += dstskip; | |
| 220 } | |
| 221 } else { | |
| 222 while ( height-- ) { | |
| 223 Uint8 byte = 0, bit; | |
| 224 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
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225 if ( (c&7) == 0 ) { |
| 0 | 226 byte = *src++; |
| 227 } | |
| 228 bit = (byte&0x80)>>7; | |
| 229 if ( bit != ckey ) { | |
| 230 *dst = bit; | |
| 231 } | |
| 232 dst++; | |
| 233 byte <<= 1; | |
| 234 } | |
| 235 src += srcskip; | |
| 236 dst += dstskip; | |
| 237 } | |
| 238 } | |
| 239 } | |
| 240 | |
| 241 static void BlitBto2Key(SDL_BlitInfo *info) | |
| 242 { | |
| 243 int width = info->d_width; | |
| 244 int height = info->d_height; | |
| 245 Uint8 *src = info->s_pixels; | |
| 246 Uint16 *dstp = (Uint16 *)info->d_pixels; | |
| 247 int srcskip = info->s_skip; | |
| 248 int dstskip = info->d_skip; | |
| 249 Uint32 ckey = info->src->colorkey; | |
| 250 Uint8 *palmap = info->table; | |
| 251 int c; | |
| 252 | |
| 253 /* Set up some basic variables */ | |
| 254 srcskip += width-(width+7)/8; | |
| 255 dstskip /= 2; | |
| 256 | |
| 257 while ( height-- ) { | |
| 258 Uint8 byte = 0, bit; | |
| 259 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
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260 if ( (c&7) == 0 ) { |
| 0 | 261 byte = *src++; |
| 262 } | |
| 263 bit = (byte&0x80)>>7; | |
| 264 if ( bit != ckey ) { | |
| 265 *dstp=((Uint16 *)palmap)[bit]; | |
| 266 } | |
| 267 byte <<= 1; | |
| 268 dstp++; | |
| 269 } | |
| 270 src += srcskip; | |
| 271 dstp += dstskip; | |
| 272 } | |
| 273 } | |
| 274 | |
| 275 static void BlitBto3Key(SDL_BlitInfo *info) | |
| 276 { | |
| 277 int width = info->d_width; | |
| 278 int height = info->d_height; | |
| 279 Uint8 *src = info->s_pixels; | |
| 280 Uint8 *dst = info->d_pixels; | |
| 281 int srcskip = info->s_skip; | |
| 282 int dstskip = info->d_skip; | |
| 283 Uint32 ckey = info->src->colorkey; | |
| 284 Uint8 *palmap = info->table; | |
| 285 int c; | |
| 286 | |
| 287 /* Set up some basic variables */ | |
| 288 srcskip += width-(width+7)/8; | |
| 289 | |
| 290 while ( height-- ) { | |
| 291 Uint8 byte = 0, bit; | |
| 292 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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293 if ( (c&7) == 0 ) { |
| 0 | 294 byte = *src++; |
| 295 } | |
| 296 bit = (byte&0x80)>>7; | |
| 297 if ( bit != ckey ) { | |
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298 SDL_memcpy(dst, &palmap[bit*4], 3); |
| 0 | 299 } |
| 300 byte <<= 1; | |
| 301 dst += 3; | |
| 302 } | |
| 303 src += srcskip; | |
| 304 dst += dstskip; | |
| 305 } | |
| 306 } | |
| 307 | |
| 308 static void BlitBto4Key(SDL_BlitInfo *info) | |
| 309 { | |
| 310 int width = info->d_width; | |
| 311 int height = info->d_height; | |
| 312 Uint8 *src = info->s_pixels; | |
| 313 Uint32 *dstp = (Uint32 *)info->d_pixels; | |
| 314 int srcskip = info->s_skip; | |
| 315 int dstskip = info->d_skip; | |
| 316 Uint32 ckey = info->src->colorkey; | |
| 317 Uint8 *palmap = info->table; | |
| 318 int c; | |
| 319 | |
| 320 /* Set up some basic variables */ | |
| 321 srcskip += width-(width+7)/8; | |
| 322 dstskip /= 4; | |
| 323 | |
| 324 while ( height-- ) { | |
| 325 Uint8 byte = 0, bit; | |
| 326 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
|
327 if ( (c&7) == 0 ) { |
| 0 | 328 byte = *src++; |
| 329 } | |
| 330 bit = (byte&0x80)>>7; | |
| 331 if ( bit != ckey ) { | |
| 332 *dstp=((Uint32 *)palmap)[bit]; | |
| 333 } | |
| 334 byte <<= 1; | |
| 335 dstp++; | |
| 336 } | |
| 337 src += srcskip; | |
| 338 dstp += dstskip; | |
| 339 } | |
| 340 } | |
| 341 | |
| 342 static void BlitBtoNAlpha(SDL_BlitInfo *info) | |
| 343 { | |
| 344 int width = info->d_width; | |
| 345 int height = info->d_height; | |
| 346 Uint8 *src = info->s_pixels; | |
| 347 Uint8 *dst = info->d_pixels; | |
| 348 int srcskip = info->s_skip; | |
| 349 int dstskip = info->d_skip; | |
| 350 const SDL_Color *srcpal = info->src->palette->colors; | |
| 351 SDL_PixelFormat *dstfmt = info->dst; | |
| 352 int dstbpp; | |
| 353 int c; | |
| 354 const int A = info->src->alpha; | |
| 355 | |
| 356 /* Set up some basic variables */ | |
| 357 dstbpp = dstfmt->BytesPerPixel; | |
| 358 srcskip += width-(width+7)/8; | |
| 359 | |
| 360 while ( height-- ) { | |
| 361 Uint8 byte = 0, bit; | |
| 362 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
|
363 if ( (c&7) == 0 ) { |
| 0 | 364 byte = *src++; |
| 365 } | |
| 366 bit = (byte&0x80)>>7; | |
| 367 if ( 1 ) { | |
| 368 Uint32 pixel; | |
| 369 unsigned sR, sG, sB; | |
| 370 unsigned dR, dG, dB; | |
| 371 sR = srcpal[bit].r; | |
| 372 sG = srcpal[bit].g; | |
| 373 sB = srcpal[bit].b; | |
| 374 DISEMBLE_RGB(dst, dstbpp, dstfmt, | |
| 375 pixel, dR, dG, dB); | |
| 376 ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB); | |
| 377 ASSEMBLE_RGB(dst, dstbpp, dstfmt, dR, dG, dB); | |
| 378 } | |
| 379 byte <<= 1; | |
| 380 dst += dstbpp; | |
| 381 } | |
| 382 src += srcskip; | |
| 383 dst += dstskip; | |
| 384 } | |
| 385 } | |
| 386 | |
| 387 static void BlitBtoNAlphaKey(SDL_BlitInfo *info) | |
| 388 { | |
| 389 int width = info->d_width; | |
| 390 int height = info->d_height; | |
| 391 Uint8 *src = info->s_pixels; | |
| 392 Uint8 *dst = info->d_pixels; | |
| 393 int srcskip = info->s_skip; | |
| 394 int dstskip = info->d_skip; | |
| 395 SDL_PixelFormat *srcfmt = info->src; | |
| 396 SDL_PixelFormat *dstfmt = info->dst; | |
| 397 const SDL_Color *srcpal = srcfmt->palette->colors; | |
| 398 int dstbpp; | |
| 399 int c; | |
| 400 const int A = srcfmt->alpha; | |
| 401 Uint32 ckey = srcfmt->colorkey; | |
| 402 | |
| 403 /* Set up some basic variables */ | |
| 404 dstbpp = dstfmt->BytesPerPixel; | |
| 405 srcskip += width-(width+7)/8; | |
| 406 | |
| 407 while ( height-- ) { | |
| 408 Uint8 byte = 0, bit; | |
| 409 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
|
410 if ( (c&7) == 0 ) { |
| 0 | 411 byte = *src++; |
| 412 } | |
| 413 bit = (byte&0x80)>>7; | |
| 414 if ( bit != ckey ) { | |
| 415 int sR, sG, sB; | |
| 416 int dR, dG, dB; | |
| 417 Uint32 pixel; | |
| 418 sR = srcpal[bit].r; | |
| 419 sG = srcpal[bit].g; | |
| 420 sB = srcpal[bit].b; | |
| 421 DISEMBLE_RGB(dst, dstbpp, dstfmt, | |
| 422 pixel, dR, dG, dB); | |
| 423 ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB); | |
| 424 ASSEMBLE_RGB(dst, dstbpp, dstfmt, dR, dG, dB); | |
| 425 } | |
| 426 byte <<= 1; | |
| 427 dst += dstbpp; | |
| 428 } | |
| 429 src += srcskip; | |
| 430 dst += dstskip; | |
| 431 } | |
| 432 } | |
| 433 | |
| 434 static SDL_loblit bitmap_blit[] = { | |
| 435 NULL, BlitBto1, BlitBto2, BlitBto3, BlitBto4 | |
| 436 }; | |
| 437 | |
| 438 static SDL_loblit colorkey_blit[] = { | |
| 439 NULL, BlitBto1Key, BlitBto2Key, BlitBto3Key, BlitBto4Key | |
| 440 }; | |
| 441 | |
| 442 SDL_loblit SDL_CalculateBlit0(SDL_Surface *surface, int blit_index) | |
| 443 { | |
| 444 int which; | |
| 445 | |
| 1058 | 446 if ( surface->format->BitsPerPixel != 1 ) { |
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447 /* 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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448 return NULL; |
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e9d23bb80140
Date: Mon, 02 May 2005 04:23:16 -0500
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449 } |
| 0 | 450 if ( surface->map->dst->format->BitsPerPixel < 8 ) { |
| 451 which = 0; | |
| 452 } else { | |
| 453 which = surface->map->dst->format->BytesPerPixel; | |
| 454 } | |
| 455 switch(blit_index) { | |
| 456 case 0: /* copy */ | |
| 457 return bitmap_blit[which]; | |
| 458 | |
| 459 case 1: /* colorkey */ | |
| 460 return colorkey_blit[which]; | |
| 461 | |
| 462 case 2: /* alpha */ | |
| 463 return which >= 2 ? BlitBtoNAlpha : NULL; | |
| 464 | |
| 465 case 4: /* alpha + colorkey */ | |
| 466 return which >= 2 ? BlitBtoNAlphaKey : NULL; | |
| 467 } | |
| 468 return NULL; | |
| 469 } | |
| 470 |