Mercurial > sdl-ios-xcode
annotate src/video/SDL_bmp.c @ 1330:450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
using Visual C++ 2005
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 06 Feb 2006 08:28:51 +0000 |
| parents | bc67bbf87818 |
| children | 3692456e7b0f |
| 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)
Sam Lantinga <slouken@libsdl.org>
parents:
1012
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changeset
|
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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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 | |
|
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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>
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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 #ifndef DISABLE_FILE | |
| 24 | |
| 25 /* | |
| 26 Code to load and save surfaces in Windows BMP format. | |
| 27 | |
| 28 Why support BMP format? Well, it's a native format for Windows, and | |
| 29 most image processing programs can read and write it. It would be nice | |
| 30 to be able to have at least one image format that we can natively load | |
| 31 and save, and since PNG is so complex that it would bloat the library, | |
| 32 BMP is a good alternative. | |
| 33 | |
| 34 This code currently supports Win32 DIBs in uncompressed 8 and 24 bpp. | |
| 35 */ | |
| 36 | |
| 37 #include "SDL_error.h" | |
| 38 #include "SDL_video.h" | |
| 39 #include "SDL_endian.h" | |
|
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
|
40 #include "SDL_string.h" |
| 0 | 41 |
| 42 /* Compression encodings for BMP files */ | |
| 43 #ifndef BI_RGB | |
| 44 #define BI_RGB 0 | |
| 45 #define BI_RLE8 1 | |
| 46 #define BI_RLE4 2 | |
| 47 #define BI_BITFIELDS 3 | |
| 48 #endif | |
| 49 | |
| 50 | |
| 51 SDL_Surface * SDL_LoadBMP_RW (SDL_RWops *src, int freesrc) | |
| 52 { | |
| 53 int was_error; | |
| 54 long fp_offset; | |
| 55 int bmpPitch; | |
| 56 int i, pad; | |
| 57 SDL_Surface *surface; | |
| 58 Uint32 Rmask; | |
| 59 Uint32 Gmask; | |
| 60 Uint32 Bmask; | |
| 61 SDL_Palette *palette; | |
| 62 Uint8 *bits; | |
| 63 int ExpandBMP; | |
| 64 | |
| 65 /* The Win32 BMP file header (14 bytes) */ | |
| 66 char magic[2]; | |
| 67 Uint32 bfSize; | |
| 68 Uint16 bfReserved1; | |
| 69 Uint16 bfReserved2; | |
| 70 Uint32 bfOffBits; | |
| 71 | |
| 72 /* The Win32 BITMAPINFOHEADER struct (40 bytes) */ | |
| 73 Uint32 biSize; | |
| 74 Sint32 biWidth; | |
| 75 Sint32 biHeight; | |
| 76 Uint16 biPlanes; | |
| 77 Uint16 biBitCount; | |
| 78 Uint32 biCompression; | |
| 79 Uint32 biSizeImage; | |
| 80 Sint32 biXPelsPerMeter; | |
| 81 Sint32 biYPelsPerMeter; | |
| 82 Uint32 biClrUsed; | |
| 83 Uint32 biClrImportant; | |
| 84 | |
| 85 /* Make sure we are passed a valid data source */ | |
| 86 surface = NULL; | |
| 87 was_error = 0; | |
| 88 if ( src == NULL ) { | |
| 89 was_error = 1; | |
| 90 goto done; | |
| 91 } | |
| 92 | |
| 93 /* Read in the BMP file header */ | |
| 94 fp_offset = SDL_RWtell(src); | |
| 95 SDL_ClearError(); | |
| 96 if ( SDL_RWread(src, magic, 1, 2) != 2 ) { | |
| 97 SDL_Error(SDL_EFREAD); | |
| 98 was_error = 1; | |
| 99 goto done; | |
| 100 } | |
| 101 if ( strncmp(magic, "BM", 2) != 0 ) { | |
| 102 SDL_SetError("File is not a Windows BMP file"); | |
| 103 was_error = 1; | |
| 104 goto done; | |
| 105 } | |
| 106 bfSize = SDL_ReadLE32(src); | |
| 107 bfReserved1 = SDL_ReadLE16(src); | |
| 108 bfReserved2 = SDL_ReadLE16(src); | |
| 109 bfOffBits = SDL_ReadLE32(src); | |
| 110 | |
| 111 /* Read the Win32 BITMAPINFOHEADER */ | |
| 112 biSize = SDL_ReadLE32(src); | |
| 113 if ( biSize == 12 ) { | |
| 114 biWidth = (Uint32)SDL_ReadLE16(src); | |
| 115 biHeight = (Uint32)SDL_ReadLE16(src); | |
| 116 biPlanes = SDL_ReadLE16(src); | |
| 117 biBitCount = SDL_ReadLE16(src); | |
| 118 biCompression = BI_RGB; | |
| 119 biSizeImage = 0; | |
| 120 biXPelsPerMeter = 0; | |
| 121 biYPelsPerMeter = 0; | |
| 122 biClrUsed = 0; | |
| 123 biClrImportant = 0; | |
| 124 } else { | |
| 125 biWidth = SDL_ReadLE32(src); | |
| 126 biHeight = SDL_ReadLE32(src); | |
| 127 biPlanes = SDL_ReadLE16(src); | |
| 128 biBitCount = SDL_ReadLE16(src); | |
| 129 biCompression = SDL_ReadLE32(src); | |
| 130 biSizeImage = SDL_ReadLE32(src); | |
| 131 biXPelsPerMeter = SDL_ReadLE32(src); | |
| 132 biYPelsPerMeter = SDL_ReadLE32(src); | |
| 133 biClrUsed = SDL_ReadLE32(src); | |
| 134 biClrImportant = SDL_ReadLE32(src); | |
| 135 } | |
| 136 | |
| 137 /* Check for read error */ | |
| 138 if ( strcmp(SDL_GetError(), "") != 0 ) { | |
| 139 was_error = 1; | |
| 140 goto done; | |
| 141 } | |
| 142 | |
| 143 /* Expand 1 and 4 bit bitmaps to 8 bits per pixel */ | |
| 144 switch (biBitCount) { | |
| 145 case 1: | |
| 146 case 4: | |
| 147 ExpandBMP = biBitCount; | |
| 148 biBitCount = 8; | |
| 149 break; | |
| 150 default: | |
| 151 ExpandBMP = 0; | |
| 152 break; | |
| 153 } | |
| 154 | |
| 155 /* We don't support any BMP compression right now */ | |
| 156 Rmask = Gmask = Bmask = 0; | |
| 157 switch (biCompression) { | |
| 158 case BI_RGB: | |
| 159 /* If there are no masks, use the defaults */ | |
| 160 if ( bfOffBits == (14+biSize) ) { | |
| 161 /* Default values for the BMP format */ | |
| 162 switch (biBitCount) { | |
| 163 case 15: | |
| 164 case 16: | |
| 165 Rmask = 0x7C00; | |
| 166 Gmask = 0x03E0; | |
| 167 Bmask = 0x001F; | |
| 168 break; | |
| 169 case 24: | |
| 170 #if SDL_BYTEORDER == SDL_BIG_ENDIAN | |
| 171 Rmask = 0x000000FF; | |
| 172 Gmask = 0x0000FF00; | |
| 173 Bmask = 0x00FF0000; | |
| 174 break; | |
| 175 #endif | |
| 176 case 32: | |
| 177 Rmask = 0x00FF0000; | |
| 178 Gmask = 0x0000FF00; | |
| 179 Bmask = 0x000000FF; | |
| 180 break; | |
| 181 default: | |
| 182 break; | |
| 183 } | |
| 184 break; | |
| 185 } | |
| 186 /* Fall through -- read the RGB masks */ | |
| 187 | |
| 188 case BI_BITFIELDS: | |
| 189 switch (biBitCount) { | |
| 190 case 15: | |
| 191 case 16: | |
| 192 case 32: | |
| 193 Rmask = SDL_ReadLE32(src); | |
| 194 Gmask = SDL_ReadLE32(src); | |
| 195 Bmask = SDL_ReadLE32(src); | |
| 196 break; | |
| 197 default: | |
| 198 break; | |
| 199 } | |
| 200 break; | |
| 201 default: | |
| 202 SDL_SetError("Compressed BMP files not supported"); | |
| 203 was_error = 1; | |
| 204 goto done; | |
| 205 } | |
| 206 | |
| 207 /* Create a compatible surface, note that the colors are RGB ordered */ | |
| 208 surface = SDL_CreateRGBSurface(SDL_SWSURFACE, | |
| 209 biWidth, biHeight, biBitCount, Rmask, Gmask, Bmask, 0); | |
| 210 if ( surface == NULL ) { | |
| 211 was_error = 1; | |
| 212 goto done; | |
| 213 } | |
| 214 | |
| 215 /* Load the palette, if any */ | |
| 216 palette = (surface->format)->palette; | |
| 217 if ( palette ) { | |
| 218 if ( biClrUsed == 0 ) { | |
| 219 biClrUsed = 1 << biBitCount; | |
| 220 } | |
| 221 if ( biSize == 12 ) { | |
| 222 for ( i = 0; i < (int)biClrUsed; ++i ) { | |
| 223 SDL_RWread(src, &palette->colors[i].b, 1, 1); | |
| 224 SDL_RWread(src, &palette->colors[i].g, 1, 1); | |
| 225 SDL_RWread(src, &palette->colors[i].r, 1, 1); | |
| 226 palette->colors[i].unused = 0; | |
| 227 } | |
| 228 } else { | |
| 229 for ( i = 0; i < (int)biClrUsed; ++i ) { | |
| 230 SDL_RWread(src, &palette->colors[i].b, 1, 1); | |
| 231 SDL_RWread(src, &palette->colors[i].g, 1, 1); | |
| 232 SDL_RWread(src, &palette->colors[i].r, 1, 1); | |
| 233 SDL_RWread(src, &palette->colors[i].unused, 1, 1); | |
| 234 } | |
| 235 } | |
| 236 palette->ncolors = biClrUsed; | |
| 237 } | |
| 238 | |
| 239 /* 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
|
240 if ( SDL_RWseek(src, fp_offset+bfOffBits, RW_SEEK_SET) < 0 ) { |
| 0 | 241 SDL_Error(SDL_EFSEEK); |
| 242 was_error = 1; | |
| 243 goto done; | |
| 244 } | |
| 245 bits = (Uint8 *)surface->pixels+(surface->h*surface->pitch); | |
| 246 switch (ExpandBMP) { | |
| 247 case 1: | |
| 248 bmpPitch = (biWidth + 7) >> 3; | |
| 249 pad = (((bmpPitch)%4) ? (4-((bmpPitch)%4)) : 0); | |
| 250 break; | |
| 251 case 4: | |
| 252 bmpPitch = (biWidth + 1) >> 1; | |
| 253 pad = (((bmpPitch)%4) ? (4-((bmpPitch)%4)) : 0); | |
| 254 break; | |
| 255 default: | |
| 256 pad = ((surface->pitch%4) ? | |
| 257 (4-(surface->pitch%4)) : 0); | |
| 258 break; | |
| 259 } | |
| 260 while ( bits > (Uint8 *)surface->pixels ) { | |
| 261 bits -= surface->pitch; | |
| 262 switch (ExpandBMP) { | |
| 263 case 1: | |
| 264 case 4: { | |
| 265 Uint8 pixel = 0; | |
| 266 int shift = (8-ExpandBMP); | |
| 267 for ( i=0; i<surface->w; ++i ) { | |
| 268 if ( i%(8/ExpandBMP) == 0 ) { | |
| 269 if ( !SDL_RWread(src, &pixel, 1, 1) ) { | |
| 270 SDL_SetError( | |
| 271 "Error reading from BMP"); | |
| 272 was_error = 1; | |
| 273 goto done; | |
| 274 } | |
| 275 } | |
| 276 *(bits+i) = (pixel>>shift); | |
| 277 pixel <<= ExpandBMP; | |
| 278 } } | |
| 279 break; | |
| 280 | |
| 281 default: | |
| 282 if ( SDL_RWread(src, bits, 1, surface->pitch) | |
| 283 != surface->pitch ) { | |
| 284 SDL_Error(SDL_EFREAD); | |
| 285 was_error = 1; | |
| 286 goto done; | |
| 287 } | |
| 288 #if SDL_BYTEORDER == SDL_BIG_ENDIAN | |
| 289 /* Byte-swap the pixels if needed. Note that the 24bpp | |
| 290 case has already been taken care of above. */ | |
| 291 switch(biBitCount) { | |
| 292 case 15: | |
| 293 case 16: { | |
| 294 Uint16 *pix = (Uint16 *)bits; | |
| 295 for(i = 0; i < surface->w; i++) | |
| 296 pix[i] = SDL_Swap16(pix[i]); | |
| 297 break; | |
| 298 } | |
| 299 | |
| 300 case 32: { | |
| 301 Uint32 *pix = (Uint32 *)bits; | |
| 302 for(i = 0; i < surface->w; i++) | |
| 303 pix[i] = SDL_Swap32(pix[i]); | |
| 304 break; | |
| 305 } | |
| 306 } | |
| 307 #endif | |
| 308 break; | |
| 309 } | |
| 310 /* Skip padding bytes, ugh */ | |
| 311 if ( pad ) { | |
| 312 Uint8 padbyte; | |
| 313 for ( i=0; i<pad; ++i ) { | |
| 314 SDL_RWread(src, &padbyte, 1, 1); | |
| 315 } | |
| 316 } | |
| 317 } | |
| 318 done: | |
| 319 if ( was_error ) { | |
|
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bc67bbf87818
Seek back to start on error
Sam Lantinga <slouken@libsdl.org>
parents:
1312
diff
changeset
|
320 if ( src ) { |
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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
|
321 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
|
322 } |
| 0 | 323 if ( surface ) { |
| 324 SDL_FreeSurface(surface); | |
| 325 } | |
| 326 surface = NULL; | |
| 327 } | |
| 328 if ( freesrc && src ) { | |
| 329 SDL_RWclose(src); | |
| 330 } | |
| 331 return(surface); | |
| 332 } | |
| 333 | |
| 334 int SDL_SaveBMP_RW (SDL_Surface *saveme, SDL_RWops *dst, int freedst) | |
| 335 { | |
| 336 long fp_offset; | |
| 337 int i, pad; | |
| 338 SDL_Surface *surface; | |
| 339 Uint8 *bits; | |
| 340 | |
| 341 /* The Win32 BMP file header (14 bytes) */ | |
| 342 char magic[2] = { 'B', 'M' }; | |
| 343 Uint32 bfSize; | |
| 344 Uint16 bfReserved1; | |
| 345 Uint16 bfReserved2; | |
| 346 Uint32 bfOffBits; | |
| 347 | |
| 348 /* The Win32 BITMAPINFOHEADER struct (40 bytes) */ | |
| 349 Uint32 biSize; | |
| 350 Sint32 biWidth; | |
| 351 Sint32 biHeight; | |
| 352 Uint16 biPlanes; | |
| 353 Uint16 biBitCount; | |
| 354 Uint32 biCompression; | |
| 355 Uint32 biSizeImage; | |
| 356 Sint32 biXPelsPerMeter; | |
| 357 Sint32 biYPelsPerMeter; | |
| 358 Uint32 biClrUsed; | |
| 359 Uint32 biClrImportant; | |
| 360 | |
| 361 /* Make sure we have somewhere to save */ | |
| 362 surface = NULL; | |
| 363 if ( dst ) { | |
| 364 if ( saveme->format->palette ) { | |
| 365 if ( saveme->format->BitsPerPixel == 8 ) { | |
| 366 surface = saveme; | |
| 367 } else { | |
| 368 SDL_SetError("%d bpp BMP files not supported", | |
| 369 saveme->format->BitsPerPixel); | |
| 370 } | |
| 371 } | |
| 372 else if ( (saveme->format->BitsPerPixel == 24) && | |
| 373 #if SDL_BYTEORDER == SDL_LIL_ENDIAN | |
| 374 (saveme->format->Rmask == 0x00FF0000) && | |
| 375 (saveme->format->Gmask == 0x0000FF00) && | |
| 376 (saveme->format->Bmask == 0x000000FF) | |
| 377 #else | |
| 378 (saveme->format->Rmask == 0x000000FF) && | |
| 379 (saveme->format->Gmask == 0x0000FF00) && | |
| 380 (saveme->format->Bmask == 0x00FF0000) | |
| 381 #endif | |
| 382 ) { | |
| 383 surface = saveme; | |
| 384 } else { | |
| 385 SDL_Rect bounds; | |
| 386 | |
| 387 /* Convert to 24 bits per pixel */ | |
| 388 surface = SDL_CreateRGBSurface(SDL_SWSURFACE, | |
| 389 saveme->w, saveme->h, 24, | |
| 390 #if SDL_BYTEORDER == SDL_LIL_ENDIAN | |
| 391 0x00FF0000, 0x0000FF00, 0x000000FF, | |
| 392 #else | |
| 393 0x000000FF, 0x0000FF00, 0x00FF0000, | |
| 394 #endif | |
| 395 0); | |
| 396 if ( surface != NULL ) { | |
| 397 bounds.x = 0; | |
| 398 bounds.y = 0; | |
| 399 bounds.w = saveme->w; | |
| 400 bounds.h = saveme->h; | |
| 401 if ( SDL_LowerBlit(saveme, &bounds, surface, | |
| 402 &bounds) < 0 ) { | |
| 403 SDL_FreeSurface(surface); | |
| 404 SDL_SetError( | |
| 405 "Couldn't convert image to 24 bpp"); | |
| 406 surface = NULL; | |
| 407 } | |
| 408 } | |
| 409 } | |
| 410 } | |
| 411 | |
| 412 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
|
413 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
|
414 |
| 0 | 415 /* Set the BMP file header values */ |
| 416 bfSize = 0; /* We'll write this when we're done */ | |
| 417 bfReserved1 = 0; | |
| 418 bfReserved2 = 0; | |
| 419 bfOffBits = 0; /* We'll write this when we're done */ | |
| 420 | |
| 421 /* Write the BMP file header values */ | |
| 422 fp_offset = SDL_RWtell(dst); | |
| 423 SDL_ClearError(); | |
| 424 SDL_RWwrite(dst, magic, 2, 1); | |
| 425 SDL_WriteLE32(dst, bfSize); | |
| 426 SDL_WriteLE16(dst, bfReserved1); | |
| 427 SDL_WriteLE16(dst, bfReserved2); | |
| 428 SDL_WriteLE32(dst, bfOffBits); | |
| 429 | |
| 430 /* Set the BMP info values */ | |
| 431 biSize = 40; | |
| 432 biWidth = surface->w; | |
| 433 biHeight = surface->h; | |
| 434 biPlanes = 1; | |
| 435 biBitCount = surface->format->BitsPerPixel; | |
| 436 biCompression = BI_RGB; | |
| 437 biSizeImage = surface->h*surface->pitch; | |
| 438 biXPelsPerMeter = 0; | |
| 439 biYPelsPerMeter = 0; | |
| 440 if ( surface->format->palette ) { | |
| 441 biClrUsed = surface->format->palette->ncolors; | |
| 442 } else { | |
| 443 biClrUsed = 0; | |
| 444 } | |
| 445 biClrImportant = 0; | |
| 446 | |
| 447 /* Write the BMP info values */ | |
| 448 SDL_WriteLE32(dst, biSize); | |
| 449 SDL_WriteLE32(dst, biWidth); | |
| 450 SDL_WriteLE32(dst, biHeight); | |
| 451 SDL_WriteLE16(dst, biPlanes); | |
| 452 SDL_WriteLE16(dst, biBitCount); | |
| 453 SDL_WriteLE32(dst, biCompression); | |
| 454 SDL_WriteLE32(dst, biSizeImage); | |
| 455 SDL_WriteLE32(dst, biXPelsPerMeter); | |
| 456 SDL_WriteLE32(dst, biYPelsPerMeter); | |
| 457 SDL_WriteLE32(dst, biClrUsed); | |
| 458 SDL_WriteLE32(dst, biClrImportant); | |
| 459 | |
| 460 /* Write the palette (in BGR color order) */ | |
| 461 if ( surface->format->palette ) { | |
| 462 SDL_Color *colors; | |
| 463 int ncolors; | |
| 464 | |
| 465 colors = surface->format->palette->colors; | |
| 466 ncolors = surface->format->palette->ncolors; | |
| 467 for ( i=0; i<ncolors; ++i ) { | |
| 468 SDL_RWwrite(dst, &colors[i].b, 1, 1); | |
| 469 SDL_RWwrite(dst, &colors[i].g, 1, 1); | |
| 470 SDL_RWwrite(dst, &colors[i].r, 1, 1); | |
| 471 SDL_RWwrite(dst, &colors[i].unused, 1, 1); | |
| 472 } | |
| 473 } | |
| 474 | |
| 475 /* Write the bitmap offset */ | |
| 476 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
|
477 if ( SDL_RWseek(dst, fp_offset+10, RW_SEEK_SET) < 0 ) { |
| 0 | 478 SDL_Error(SDL_EFSEEK); |
| 479 } | |
| 480 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
|
481 if ( SDL_RWseek(dst, fp_offset+bfOffBits, RW_SEEK_SET) < 0 ) { |
| 0 | 482 SDL_Error(SDL_EFSEEK); |
| 483 } | |
| 484 | |
| 485 /* Write the bitmap image upside down */ | |
| 486 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
|
487 pad = ((bw%4) ? (4-(bw%4)) : 0); |
| 0 | 488 while ( bits > (Uint8 *)surface->pixels ) { |
| 489 bits -= surface->pitch; | |
|
1012
f14e3059e138
Date: Mon, 13 Dec 2004 21:28:18 -0500
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
490 if ( SDL_RWwrite(dst, bits, 1, bw) != bw) { |
| 0 | 491 SDL_Error(SDL_EFWRITE); |
| 492 break; | |
| 493 } | |
| 494 if ( pad ) { | |
| 495 const Uint8 padbyte = 0; | |
| 496 for ( i=0; i<pad; ++i ) { | |
| 497 SDL_RWwrite(dst, &padbyte, 1, 1); | |
| 498 } | |
| 499 } | |
| 500 } | |
| 501 | |
| 502 /* Write the BMP file size */ | |
| 503 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
|
504 if ( SDL_RWseek(dst, fp_offset+2, RW_SEEK_SET) < 0 ) { |
| 0 | 505 SDL_Error(SDL_EFSEEK); |
| 506 } | |
| 507 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
|
508 if ( SDL_RWseek(dst, fp_offset+bfSize, RW_SEEK_SET) < 0 ) { |
| 0 | 509 SDL_Error(SDL_EFSEEK); |
| 510 } | |
| 511 | |
| 512 /* Close it up.. */ | |
| 513 SDL_UnlockSurface(surface); | |
| 514 if ( surface != saveme ) { | |
| 515 SDL_FreeSurface(surface); | |
| 516 } | |
| 517 } | |
| 518 | |
| 519 if ( freedst && dst ) { | |
| 520 SDL_RWclose(dst); | |
| 521 } | |
| 522 return((strcmp(SDL_GetError(), "") == 0) ? 0 : -1); | |
| 523 } | |
| 524 | |
| 525 #endif /* ENABLE_FILE */ |