Mercurial > sdl-ios-xcode
annotate src/video/SDL_bmp.c @ 3888:6d2e1961661a SDL-1.2
Removed broken AmigaOS support.
Fixes Bugzilla #337.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Sun, 29 Oct 2006 03:58:27 +0000 |
| parents | d910939febfa |
| children | 782fd950bd46 c121d94672cb a1b03ba2fcd0 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
1012
diff
changeset
|
3 Copyright (C) 1997-2006 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
1012
diff
changeset
|
6 modify it under the terms of the GNU Lesser General Public |
| 0 | 7 License as published by the Free Software Foundation; either |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
1012
diff
changeset
|
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
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
1012
diff
changeset
|
13 Lesser General Public License for more details. |
| 0 | 14 |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
1012
diff
changeset
|
15 You should have received a copy of the GNU Lesser General Public |
|
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
1012
diff
changeset
|
16 License along with this library; if not, write to the Free Software |
|
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
1012
diff
changeset
|
17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
| 19 Sam Lantinga | |
|
252
e8157fcb3114
Updated the source with the correct e-mail address
Sam Lantinga <slouken@libsdl.org>
parents:
0
diff
changeset
|
20 slouken@libsdl.org |
| 0 | 21 */ |
|
1402
d910939febfa
Use consistent identifiers for the various platforms we support.
Sam Lantinga <slouken@libsdl.org>
parents:
1361
diff
changeset
|
22 #include "SDL_config.h" |
| 0 | 23 |
| 24 /* | |
| 25 Code to load and save surfaces in Windows BMP format. | |
| 26 | |
| 27 Why support BMP format? Well, it's a native format for Windows, and | |
| 28 most image processing programs can read and write it. It would be nice | |
| 29 to be able to have at least one image format that we can natively load | |
| 30 and save, and since PNG is so complex that it would bloat the library, | |
| 31 BMP is a good alternative. | |
| 32 | |
| 33 This code currently supports Win32 DIBs in uncompressed 8 and 24 bpp. | |
| 34 */ | |
| 35 | |
| 36 #include "SDL_video.h" | |
| 37 #include "SDL_endian.h" | |
| 38 | |
| 39 /* Compression encodings for BMP files */ | |
| 40 #ifndef BI_RGB | |
| 41 #define BI_RGB 0 | |
| 42 #define BI_RLE8 1 | |
| 43 #define BI_RLE4 2 | |
| 44 #define BI_BITFIELDS 3 | |
| 45 #endif | |
| 46 | |
| 47 | |
| 48 SDL_Surface * SDL_LoadBMP_RW (SDL_RWops *src, int freesrc) | |
| 49 { | |
| 50 int was_error; | |
| 51 long fp_offset; | |
| 52 int bmpPitch; | |
| 53 int i, pad; | |
| 54 SDL_Surface *surface; | |
| 55 Uint32 Rmask; | |
| 56 Uint32 Gmask; | |
| 57 Uint32 Bmask; | |
| 58 SDL_Palette *palette; | |
| 59 Uint8 *bits; | |
| 60 int ExpandBMP; | |
| 61 | |
| 62 /* The Win32 BMP file header (14 bytes) */ | |
| 63 char magic[2]; | |
| 64 Uint32 bfSize; | |
| 65 Uint16 bfReserved1; | |
| 66 Uint16 bfReserved2; | |
| 67 Uint32 bfOffBits; | |
| 68 | |
| 69 /* The Win32 BITMAPINFOHEADER struct (40 bytes) */ | |
| 70 Uint32 biSize; | |
| 71 Sint32 biWidth; | |
| 72 Sint32 biHeight; | |
| 73 Uint16 biPlanes; | |
| 74 Uint16 biBitCount; | |
| 75 Uint32 biCompression; | |
| 76 Uint32 biSizeImage; | |
| 77 Sint32 biXPelsPerMeter; | |
| 78 Sint32 biYPelsPerMeter; | |
| 79 Uint32 biClrUsed; | |
| 80 Uint32 biClrImportant; | |
| 81 | |
| 82 /* Make sure we are passed a valid data source */ | |
| 83 surface = NULL; | |
| 84 was_error = 0; | |
| 85 if ( src == NULL ) { | |
| 86 was_error = 1; | |
| 87 goto done; | |
| 88 } | |
| 89 | |
| 90 /* Read in the BMP file header */ | |
| 91 fp_offset = SDL_RWtell(src); | |
| 92 SDL_ClearError(); | |
| 93 if ( SDL_RWread(src, magic, 1, 2) != 2 ) { | |
| 94 SDL_Error(SDL_EFREAD); | |
| 95 was_error = 1; | |
| 96 goto done; | |
| 97 } | |
|
1336
3692456e7b0f
Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents:
1330
diff
changeset
|
98 if ( SDL_strncmp(magic, "BM", 2) != 0 ) { |
| 0 | 99 SDL_SetError("File is not a Windows BMP file"); |
| 100 was_error = 1; | |
| 101 goto done; | |
| 102 } | |
| 103 bfSize = SDL_ReadLE32(src); | |
| 104 bfReserved1 = SDL_ReadLE16(src); | |
| 105 bfReserved2 = SDL_ReadLE16(src); | |
| 106 bfOffBits = SDL_ReadLE32(src); | |
| 107 | |
| 108 /* Read the Win32 BITMAPINFOHEADER */ | |
| 109 biSize = SDL_ReadLE32(src); | |
| 110 if ( biSize == 12 ) { | |
| 111 biWidth = (Uint32)SDL_ReadLE16(src); | |
| 112 biHeight = (Uint32)SDL_ReadLE16(src); | |
| 113 biPlanes = SDL_ReadLE16(src); | |
| 114 biBitCount = SDL_ReadLE16(src); | |
| 115 biCompression = BI_RGB; | |
| 116 biSizeImage = 0; | |
| 117 biXPelsPerMeter = 0; | |
| 118 biYPelsPerMeter = 0; | |
| 119 biClrUsed = 0; | |
| 120 biClrImportant = 0; | |
| 121 } else { | |
| 122 biWidth = SDL_ReadLE32(src); | |
| 123 biHeight = SDL_ReadLE32(src); | |
| 124 biPlanes = SDL_ReadLE16(src); | |
| 125 biBitCount = SDL_ReadLE16(src); | |
| 126 biCompression = SDL_ReadLE32(src); | |
| 127 biSizeImage = SDL_ReadLE32(src); | |
| 128 biXPelsPerMeter = SDL_ReadLE32(src); | |
| 129 biYPelsPerMeter = SDL_ReadLE32(src); | |
| 130 biClrUsed = SDL_ReadLE32(src); | |
| 131 biClrImportant = SDL_ReadLE32(src); | |
| 132 } | |
| 133 | |
| 134 /* Check for read error */ | |
|
1336
3692456e7b0f
Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents:
1330
diff
changeset
|
135 if ( SDL_strcmp(SDL_GetError(), "") != 0 ) { |
| 0 | 136 was_error = 1; |
| 137 goto done; | |
| 138 } | |
| 139 | |
| 140 /* Expand 1 and 4 bit bitmaps to 8 bits per pixel */ | |
| 141 switch (biBitCount) { | |
| 142 case 1: | |
| 143 case 4: | |
| 144 ExpandBMP = biBitCount; | |
| 145 biBitCount = 8; | |
| 146 break; | |
| 147 default: | |
| 148 ExpandBMP = 0; | |
| 149 break; | |
| 150 } | |
| 151 | |
| 152 /* We don't support any BMP compression right now */ | |
| 153 Rmask = Gmask = Bmask = 0; | |
| 154 switch (biCompression) { | |
| 155 case BI_RGB: | |
| 156 /* If there are no masks, use the defaults */ | |
| 157 if ( bfOffBits == (14+biSize) ) { | |
| 158 /* Default values for the BMP format */ | |
| 159 switch (biBitCount) { | |
| 160 case 15: | |
| 161 case 16: | |
| 162 Rmask = 0x7C00; | |
| 163 Gmask = 0x03E0; | |
| 164 Bmask = 0x001F; | |
| 165 break; | |
| 166 case 24: | |
| 167 #if SDL_BYTEORDER == SDL_BIG_ENDIAN | |
| 168 Rmask = 0x000000FF; | |
| 169 Gmask = 0x0000FF00; | |
| 170 Bmask = 0x00FF0000; | |
| 171 break; | |
| 172 #endif | |
| 173 case 32: | |
| 174 Rmask = 0x00FF0000; | |
| 175 Gmask = 0x0000FF00; | |
| 176 Bmask = 0x000000FF; | |
| 177 break; | |
| 178 default: | |
| 179 break; | |
| 180 } | |
| 181 break; | |
| 182 } | |
| 183 /* Fall through -- read the RGB masks */ | |
| 184 | |
| 185 case BI_BITFIELDS: | |
| 186 switch (biBitCount) { | |
| 187 case 15: | |
| 188 case 16: | |
| 189 case 32: | |
| 190 Rmask = SDL_ReadLE32(src); | |
| 191 Gmask = SDL_ReadLE32(src); | |
| 192 Bmask = SDL_ReadLE32(src); | |
| 193 break; | |
| 194 default: | |
| 195 break; | |
| 196 } | |
| 197 break; | |
| 198 default: | |
| 199 SDL_SetError("Compressed BMP files not supported"); | |
| 200 was_error = 1; | |
| 201 goto done; | |
| 202 } | |
| 203 | |
| 204 /* Create a compatible surface, note that the colors are RGB ordered */ | |
| 205 surface = SDL_CreateRGBSurface(SDL_SWSURFACE, | |
| 206 biWidth, biHeight, biBitCount, Rmask, Gmask, Bmask, 0); | |
| 207 if ( surface == NULL ) { | |
| 208 was_error = 1; | |
| 209 goto done; | |
| 210 } | |
| 211 | |
| 212 /* Load the palette, if any */ | |
| 213 palette = (surface->format)->palette; | |
| 214 if ( palette ) { | |
| 215 if ( biClrUsed == 0 ) { | |
| 216 biClrUsed = 1 << biBitCount; | |
| 217 } | |
| 218 if ( biSize == 12 ) { | |
| 219 for ( i = 0; i < (int)biClrUsed; ++i ) { | |
| 220 SDL_RWread(src, &palette->colors[i].b, 1, 1); | |
| 221 SDL_RWread(src, &palette->colors[i].g, 1, 1); | |
| 222 SDL_RWread(src, &palette->colors[i].r, 1, 1); | |
| 223 palette->colors[i].unused = 0; | |
| 224 } | |
| 225 } else { | |
| 226 for ( i = 0; i < (int)biClrUsed; ++i ) { | |
| 227 SDL_RWread(src, &palette->colors[i].b, 1, 1); | |
| 228 SDL_RWread(src, &palette->colors[i].g, 1, 1); | |
| 229 SDL_RWread(src, &palette->colors[i].r, 1, 1); | |
| 230 SDL_RWread(src, &palette->colors[i].unused, 1, 1); | |
| 231 } | |
| 232 } | |
| 233 palette->ncolors = biClrUsed; | |
| 234 } | |
| 235 | |
| 236 /* Read the surface pixels. Note that the bmp image is upside down */ | |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
1329
diff
changeset
|
237 if ( SDL_RWseek(src, fp_offset+bfOffBits, RW_SEEK_SET) < 0 ) { |
| 0 | 238 SDL_Error(SDL_EFSEEK); |
| 239 was_error = 1; | |
| 240 goto done; | |
| 241 } | |
| 242 bits = (Uint8 *)surface->pixels+(surface->h*surface->pitch); | |
| 243 switch (ExpandBMP) { | |
| 244 case 1: | |
| 245 bmpPitch = (biWidth + 7) >> 3; | |
| 246 pad = (((bmpPitch)%4) ? (4-((bmpPitch)%4)) : 0); | |
| 247 break; | |
| 248 case 4: | |
| 249 bmpPitch = (biWidth + 1) >> 1; | |
| 250 pad = (((bmpPitch)%4) ? (4-((bmpPitch)%4)) : 0); | |
| 251 break; | |
| 252 default: | |
| 253 pad = ((surface->pitch%4) ? | |
| 254 (4-(surface->pitch%4)) : 0); | |
| 255 break; | |
| 256 } | |
| 257 while ( bits > (Uint8 *)surface->pixels ) { | |
| 258 bits -= surface->pitch; | |
| 259 switch (ExpandBMP) { | |
| 260 case 1: | |
| 261 case 4: { | |
| 262 Uint8 pixel = 0; | |
| 263 int shift = (8-ExpandBMP); | |
| 264 for ( i=0; i<surface->w; ++i ) { | |
| 265 if ( i%(8/ExpandBMP) == 0 ) { | |
| 266 if ( !SDL_RWread(src, &pixel, 1, 1) ) { | |
| 267 SDL_SetError( | |
| 268 "Error reading from BMP"); | |
| 269 was_error = 1; | |
| 270 goto done; | |
| 271 } | |
| 272 } | |
| 273 *(bits+i) = (pixel>>shift); | |
| 274 pixel <<= ExpandBMP; | |
| 275 } } | |
| 276 break; | |
| 277 | |
| 278 default: | |
| 279 if ( SDL_RWread(src, bits, 1, surface->pitch) | |
| 280 != surface->pitch ) { | |
| 281 SDL_Error(SDL_EFREAD); | |
| 282 was_error = 1; | |
| 283 goto done; | |
| 284 } | |
| 285 #if SDL_BYTEORDER == SDL_BIG_ENDIAN | |
| 286 /* Byte-swap the pixels if needed. Note that the 24bpp | |
| 287 case has already been taken care of above. */ | |
| 288 switch(biBitCount) { | |
| 289 case 15: | |
| 290 case 16: { | |
| 291 Uint16 *pix = (Uint16 *)bits; | |
| 292 for(i = 0; i < surface->w; i++) | |
| 293 pix[i] = SDL_Swap16(pix[i]); | |
| 294 break; | |
| 295 } | |
| 296 | |
| 297 case 32: { | |
| 298 Uint32 *pix = (Uint32 *)bits; | |
| 299 for(i = 0; i < surface->w; i++) | |
| 300 pix[i] = SDL_Swap32(pix[i]); | |
| 301 break; | |
| 302 } | |
| 303 } | |
| 304 #endif | |
| 305 break; | |
| 306 } | |
| 307 /* Skip padding bytes, ugh */ | |
| 308 if ( pad ) { | |
| 309 Uint8 padbyte; | |
| 310 for ( i=0; i<pad; ++i ) { | |
| 311 SDL_RWread(src, &padbyte, 1, 1); | |
| 312 } | |
| 313 } | |
| 314 } | |
| 315 done: | |
| 316 if ( was_error ) { | |
|
1329
bc67bbf87818
Seek back to start on error
Sam Lantinga <slouken@libsdl.org>
parents:
1312
diff
changeset
|
317 if ( src ) { |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
1329
diff
changeset
|
318 SDL_RWseek(src, fp_offset, RW_SEEK_SET); |
|
1329
bc67bbf87818
Seek back to start on error
Sam Lantinga <slouken@libsdl.org>
parents:
1312
diff
changeset
|
319 } |
| 0 | 320 if ( surface ) { |
| 321 SDL_FreeSurface(surface); | |
| 322 } | |
| 323 surface = NULL; | |
| 324 } | |
| 325 if ( freesrc && src ) { | |
| 326 SDL_RWclose(src); | |
| 327 } | |
| 328 return(surface); | |
| 329 } | |
| 330 | |
| 331 int SDL_SaveBMP_RW (SDL_Surface *saveme, SDL_RWops *dst, int freedst) | |
| 332 { | |
| 333 long fp_offset; | |
| 334 int i, pad; | |
| 335 SDL_Surface *surface; | |
| 336 Uint8 *bits; | |
| 337 | |
| 338 /* The Win32 BMP file header (14 bytes) */ | |
| 339 char magic[2] = { 'B', 'M' }; | |
| 340 Uint32 bfSize; | |
| 341 Uint16 bfReserved1; | |
| 342 Uint16 bfReserved2; | |
| 343 Uint32 bfOffBits; | |
| 344 | |
| 345 /* The Win32 BITMAPINFOHEADER struct (40 bytes) */ | |
| 346 Uint32 biSize; | |
| 347 Sint32 biWidth; | |
| 348 Sint32 biHeight; | |
| 349 Uint16 biPlanes; | |
| 350 Uint16 biBitCount; | |
| 351 Uint32 biCompression; | |
| 352 Uint32 biSizeImage; | |
| 353 Sint32 biXPelsPerMeter; | |
| 354 Sint32 biYPelsPerMeter; | |
| 355 Uint32 biClrUsed; | |
| 356 Uint32 biClrImportant; | |
| 357 | |
| 358 /* Make sure we have somewhere to save */ | |
| 359 surface = NULL; | |
| 360 if ( dst ) { | |
| 361 if ( saveme->format->palette ) { | |
| 362 if ( saveme->format->BitsPerPixel == 8 ) { | |
| 363 surface = saveme; | |
| 364 } else { | |
| 365 SDL_SetError("%d bpp BMP files not supported", | |
| 366 saveme->format->BitsPerPixel); | |
| 367 } | |
| 368 } | |
| 369 else if ( (saveme->format->BitsPerPixel == 24) && | |
| 370 #if SDL_BYTEORDER == SDL_LIL_ENDIAN | |
| 371 (saveme->format->Rmask == 0x00FF0000) && | |
| 372 (saveme->format->Gmask == 0x0000FF00) && | |
| 373 (saveme->format->Bmask == 0x000000FF) | |
| 374 #else | |
| 375 (saveme->format->Rmask == 0x000000FF) && | |
| 376 (saveme->format->Gmask == 0x0000FF00) && | |
| 377 (saveme->format->Bmask == 0x00FF0000) | |
| 378 #endif | |
| 379 ) { | |
| 380 surface = saveme; | |
| 381 } else { | |
| 382 SDL_Rect bounds; | |
| 383 | |
| 384 /* Convert to 24 bits per pixel */ | |
| 385 surface = SDL_CreateRGBSurface(SDL_SWSURFACE, | |
| 386 saveme->w, saveme->h, 24, | |
| 387 #if SDL_BYTEORDER == SDL_LIL_ENDIAN | |
| 388 0x00FF0000, 0x0000FF00, 0x000000FF, | |
| 389 #else | |
| 390 0x000000FF, 0x0000FF00, 0x00FF0000, | |
| 391 #endif | |
| 392 0); | |
| 393 if ( surface != NULL ) { | |
| 394 bounds.x = 0; | |
| 395 bounds.y = 0; | |
| 396 bounds.w = saveme->w; | |
| 397 bounds.h = saveme->h; | |
| 398 if ( SDL_LowerBlit(saveme, &bounds, surface, | |
| 399 &bounds) < 0 ) { | |
| 400 SDL_FreeSurface(surface); | |
| 401 SDL_SetError( | |
| 402 "Couldn't convert image to 24 bpp"); | |
| 403 surface = NULL; | |
| 404 } | |
| 405 } | |
| 406 } | |
| 407 } | |
| 408 | |
| 409 if ( surface && (SDL_LockSurface(surface) == 0) ) { | |
|
1012
f14e3059e138
Date: Mon, 13 Dec 2004 21:28:18 -0500
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
410 const int bw = surface->w*surface->format->BytesPerPixel; |
|
f14e3059e138
Date: Mon, 13 Dec 2004 21:28:18 -0500
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
411 |
| 0 | 412 /* Set the BMP file header values */ |
| 413 bfSize = 0; /* We'll write this when we're done */ | |
| 414 bfReserved1 = 0; | |
| 415 bfReserved2 = 0; | |
| 416 bfOffBits = 0; /* We'll write this when we're done */ | |
| 417 | |
| 418 /* Write the BMP file header values */ | |
| 419 fp_offset = SDL_RWtell(dst); | |
| 420 SDL_ClearError(); | |
| 421 SDL_RWwrite(dst, magic, 2, 1); | |
| 422 SDL_WriteLE32(dst, bfSize); | |
| 423 SDL_WriteLE16(dst, bfReserved1); | |
| 424 SDL_WriteLE16(dst, bfReserved2); | |
| 425 SDL_WriteLE32(dst, bfOffBits); | |
| 426 | |
| 427 /* Set the BMP info values */ | |
| 428 biSize = 40; | |
| 429 biWidth = surface->w; | |
| 430 biHeight = surface->h; | |
| 431 biPlanes = 1; | |
| 432 biBitCount = surface->format->BitsPerPixel; | |
| 433 biCompression = BI_RGB; | |
| 434 biSizeImage = surface->h*surface->pitch; | |
| 435 biXPelsPerMeter = 0; | |
| 436 biYPelsPerMeter = 0; | |
| 437 if ( surface->format->palette ) { | |
| 438 biClrUsed = surface->format->palette->ncolors; | |
| 439 } else { | |
| 440 biClrUsed = 0; | |
| 441 } | |
| 442 biClrImportant = 0; | |
| 443 | |
| 444 /* Write the BMP info values */ | |
| 445 SDL_WriteLE32(dst, biSize); | |
| 446 SDL_WriteLE32(dst, biWidth); | |
| 447 SDL_WriteLE32(dst, biHeight); | |
| 448 SDL_WriteLE16(dst, biPlanes); | |
| 449 SDL_WriteLE16(dst, biBitCount); | |
| 450 SDL_WriteLE32(dst, biCompression); | |
| 451 SDL_WriteLE32(dst, biSizeImage); | |
| 452 SDL_WriteLE32(dst, biXPelsPerMeter); | |
| 453 SDL_WriteLE32(dst, biYPelsPerMeter); | |
| 454 SDL_WriteLE32(dst, biClrUsed); | |
| 455 SDL_WriteLE32(dst, biClrImportant); | |
| 456 | |
| 457 /* Write the palette (in BGR color order) */ | |
| 458 if ( surface->format->palette ) { | |
| 459 SDL_Color *colors; | |
| 460 int ncolors; | |
| 461 | |
| 462 colors = surface->format->palette->colors; | |
| 463 ncolors = surface->format->palette->ncolors; | |
| 464 for ( i=0; i<ncolors; ++i ) { | |
| 465 SDL_RWwrite(dst, &colors[i].b, 1, 1); | |
| 466 SDL_RWwrite(dst, &colors[i].g, 1, 1); | |
| 467 SDL_RWwrite(dst, &colors[i].r, 1, 1); | |
| 468 SDL_RWwrite(dst, &colors[i].unused, 1, 1); | |
| 469 } | |
| 470 } | |
| 471 | |
| 472 /* Write the bitmap offset */ | |
| 473 bfOffBits = SDL_RWtell(dst)-fp_offset; | |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
1329
diff
changeset
|
474 if ( SDL_RWseek(dst, fp_offset+10, RW_SEEK_SET) < 0 ) { |
| 0 | 475 SDL_Error(SDL_EFSEEK); |
| 476 } | |
| 477 SDL_WriteLE32(dst, bfOffBits); | |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
1329
diff
changeset
|
478 if ( SDL_RWseek(dst, fp_offset+bfOffBits, RW_SEEK_SET) < 0 ) { |
| 0 | 479 SDL_Error(SDL_EFSEEK); |
| 480 } | |
| 481 | |
| 482 /* Write the bitmap image upside down */ | |
| 483 bits = (Uint8 *)surface->pixels+(surface->h*surface->pitch); | |
|
1012
f14e3059e138
Date: Mon, 13 Dec 2004 21:28:18 -0500
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
484 pad = ((bw%4) ? (4-(bw%4)) : 0); |
| 0 | 485 while ( bits > (Uint8 *)surface->pixels ) { |
| 486 bits -= surface->pitch; | |
|
1012
f14e3059e138
Date: Mon, 13 Dec 2004 21:28:18 -0500
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
487 if ( SDL_RWwrite(dst, bits, 1, bw) != bw) { |
| 0 | 488 SDL_Error(SDL_EFWRITE); |
| 489 break; | |
| 490 } | |
| 491 if ( pad ) { | |
| 492 const Uint8 padbyte = 0; | |
| 493 for ( i=0; i<pad; ++i ) { | |
| 494 SDL_RWwrite(dst, &padbyte, 1, 1); | |
| 495 } | |
| 496 } | |
| 497 } | |
| 498 | |
| 499 /* Write the BMP file size */ | |
| 500 bfSize = SDL_RWtell(dst)-fp_offset; | |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
1329
diff
changeset
|
501 if ( SDL_RWseek(dst, fp_offset+2, RW_SEEK_SET) < 0 ) { |
| 0 | 502 SDL_Error(SDL_EFSEEK); |
| 503 } | |
| 504 SDL_WriteLE32(dst, bfSize); | |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
1329
diff
changeset
|
505 if ( SDL_RWseek(dst, fp_offset+bfSize, RW_SEEK_SET) < 0 ) { |
| 0 | 506 SDL_Error(SDL_EFSEEK); |
| 507 } | |
| 508 | |
| 509 /* Close it up.. */ | |
| 510 SDL_UnlockSurface(surface); | |
| 511 if ( surface != saveme ) { | |
| 512 SDL_FreeSurface(surface); | |
| 513 } | |
| 514 } | |
| 515 | |
| 516 if ( freedst && dst ) { | |
| 517 SDL_RWclose(dst); | |
| 518 } | |
|
1336
3692456e7b0f
Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents:
1330
diff
changeset
|
519 return((SDL_strcmp(SDL_GetError(), "") == 0) ? 0 : -1); |
| 0 | 520 } |