Mercurial > hg > dmlib
annotate libgfx.c @ 440:b4ed5292d7bf
Close the file after writing.
| author | Matti Hamalainen <ccr@tnsp.org> |
|---|---|
| date | Sun, 04 Nov 2012 03:32:00 +0200 |
| parents | 86f956e4580f |
| children | a67600e186d0 |
| rev | line source |
|---|---|
| 435 | 1 /* |
| 2 * Functions for reading and converting various restricted | |
| 3 * C64/etc and/or indexed/paletted graphics formats. | |
| 4 * Programmed and designed by Matti 'ccr' Hamalainen | |
| 5 * (C) Copyright 2012 Tecnic Software productions (TNSP) | |
| 6 * | |
| 7 * Please read file 'COPYING' for information on license and distribution. | |
| 8 */ | |
| 9 #include "libgfx.h" | |
| 10 #include "dmfile.h" | |
| 11 #include "dmbstr.h" | |
| 12 | |
| 13 #ifdef DM_USE_LIBPNG | |
| 14 #include <png.h> | |
| 15 #endif | |
| 16 | |
| 17 | |
| 18 DMImage * dmImageAlloc(int width, int height) | |
| 19 { | |
| 20 DMImage *img = dmCalloc(1, sizeof(DMImage)); | |
| 21 if (img == NULL) | |
| 22 return NULL; | |
| 23 | |
| 24 img->width = img->pitch = width; | |
| 25 img->height = height; | |
| 26 img->data = dmMalloc(width * height * sizeof(Uint8)); | |
| 27 if (img->data == NULL) | |
| 28 { | |
| 29 dmFree(img); | |
| 30 return NULL; | |
| 31 } | |
| 32 | |
| 33 return img; | |
| 34 } | |
| 35 | |
| 36 | |
| 37 void dmImageFree(DMImage *img) | |
| 38 { | |
| 39 if (img != NULL) | |
| 40 { | |
| 41 if (!img->constpal) | |
| 42 { | |
| 43 dmFree(img->pal); | |
| 44 } | |
| 45 dmFree(img->data); | |
| 46 dmFree(img); | |
| 47 } | |
| 48 } | |
| 49 | |
| 50 | |
| 51 int dmImageGetBytesPerPixel(int format) | |
| 52 { | |
| 53 switch (format) | |
| 54 { | |
| 55 case DM_IFMT_PALETTE : return 1; | |
| 56 | |
| 57 case DM_IFMT_RGB_PLANE : | |
| 58 case DM_IFMT_RGB : return 3; | |
| 59 | |
| 60 case DM_IFMT_RGBA : return 4; | |
| 61 | |
| 62 default: return 0; | |
| 63 } | |
| 64 } | |
| 65 | |
| 66 | |
| 67 int dmWriteImageData(DMImage *img, void *cbdata, BOOL (*writeRowCB)(void *, Uint8 *, size_t), const DMImageSpec *spec) | |
| 68 { | |
| 69 int x, y, yscale, xscale, res = 0, rowSize, rowWidth; | |
| 70 Uint8 *row = NULL; | |
| 71 | |
| 72 // Allocate memory for row buffer | |
| 73 rowWidth = img->width * spec->scale; | |
| 74 rowSize = rowWidth * dmImageGetBytesPerPixel(spec->format); | |
| 75 | |
| 76 if ((row = dmMalloc(rowSize + 16)) == NULL) | |
| 77 { | |
| 78 res = DMERR_MALLOC; | |
| 79 goto done; | |
| 80 } | |
| 81 | |
| 82 // Generate the image | |
| 83 for (y = 0; y < img->height; y++) | |
| 84 { | |
|
436
86f956e4580f
Cosmetics, rename a variable.
Matti Hamalainen <ccr@tnsp.org>
parents:
435
diff
changeset
|
85 Uint8 *ptr1 = row, |
| 435 | 86 *ptr2 = ptr1 + rowWidth, |
| 87 *ptr3 = ptr2 + rowWidth; | |
| 88 | |
| 89 for (x = 0; x < img->width; x++) | |
| 90 { | |
| 91 Uint8 c = img->data[(y * img->pitch) + x], qr, qg, qb, qa; | |
| 92 switch (spec->format) | |
| 93 { | |
| 94 case DM_IFMT_PALETTE: | |
| 95 for (xscale = 0; xscale < spec->scale; xscale++) | |
|
436
86f956e4580f
Cosmetics, rename a variable.
Matti Hamalainen <ccr@tnsp.org>
parents:
435
diff
changeset
|
96 *ptr1++ = c; |
| 435 | 97 break; |
| 98 | |
| 99 case DM_IFMT_RGBA: | |
| 100 qr = img->pal[c].r; | |
| 101 qg = img->pal[c].g; | |
| 102 qb = img->pal[c].b; | |
| 103 qa = (c == img->ctrans) ? 0 : 255; | |
| 104 | |
| 105 for (xscale = 0; xscale < spec->scale; xscale++) | |
| 106 { | |
|
436
86f956e4580f
Cosmetics, rename a variable.
Matti Hamalainen <ccr@tnsp.org>
parents:
435
diff
changeset
|
107 *ptr1++ = qr; |
|
86f956e4580f
Cosmetics, rename a variable.
Matti Hamalainen <ccr@tnsp.org>
parents:
435
diff
changeset
|
108 *ptr1++ = qg; |
|
86f956e4580f
Cosmetics, rename a variable.
Matti Hamalainen <ccr@tnsp.org>
parents:
435
diff
changeset
|
109 *ptr1++ = qb; |
|
86f956e4580f
Cosmetics, rename a variable.
Matti Hamalainen <ccr@tnsp.org>
parents:
435
diff
changeset
|
110 *ptr1++ = qa; |
| 435 | 111 } |
| 112 break; | |
| 113 | |
| 114 case DM_IFMT_RGB: | |
| 115 qr = img->pal[c].r; | |
| 116 qg = img->pal[c].g; | |
| 117 qb = img->pal[c].b; | |
| 118 | |
| 119 for (xscale = 0; xscale < spec->scale; xscale++) | |
| 120 { | |
|
436
86f956e4580f
Cosmetics, rename a variable.
Matti Hamalainen <ccr@tnsp.org>
parents:
435
diff
changeset
|
121 *ptr1++ = qr; |
|
86f956e4580f
Cosmetics, rename a variable.
Matti Hamalainen <ccr@tnsp.org>
parents:
435
diff
changeset
|
122 *ptr1++ = qg; |
|
86f956e4580f
Cosmetics, rename a variable.
Matti Hamalainen <ccr@tnsp.org>
parents:
435
diff
changeset
|
123 *ptr1++ = qb; |
| 435 | 124 } |
| 125 break; | |
| 126 | |
| 127 case DM_IFMT_RGB_PLANE: | |
| 128 qr = img->pal[c].r; | |
| 129 qg = img->pal[c].g; | |
| 130 qb = img->pal[c].b; | |
| 131 | |
| 132 for (xscale = 0; xscale < spec->scale; xscale++) | |
| 133 { | |
| 134 *ptr1++ = qr; | |
| 135 *ptr2++ = qg; | |
| 136 *ptr3++ = qb; | |
| 137 } | |
| 138 break; | |
| 139 } | |
| 140 } | |
| 141 | |
| 142 for (yscale = 0; yscale < spec->scale; yscale++) | |
| 143 { | |
| 144 if (!writeRowCB(cbdata, row, rowSize)) | |
| 145 { | |
| 146 res = DMERR_FWRITE; | |
| 147 goto done; | |
| 148 } | |
| 149 } | |
| 150 } | |
| 151 | |
| 152 done: | |
| 153 dmFree(row); | |
| 154 return res; | |
| 155 } | |
| 156 | |
| 157 | |
| 158 #define DMCOL(x) (((x) >> 4) & 0xf) | |
| 159 | |
| 160 int dmWriteIFFMasterRAWPalette(const char *filename, DMImage *img, int ncolors) | |
| 161 { | |
| 162 FILE *fp; | |
| 163 int i; | |
| 164 | |
| 165 if ((fp = fopen(filename, "w")) == NULL) | |
| 166 { | |
| 167 dmError("IFFMasterRAW: Could not open file '%s' for writing.\n", filename); | |
| 168 return -15; | |
| 169 } | |
| 170 | |
| 171 for (i = 0; i < ncolors; i++) | |
| 172 { | |
| 173 int color; | |
| 174 if (i < img->ncolors) | |
| 175 { | |
| 176 color = (DMCOL(img->pal[i].r) << 8) | | |
| 177 (DMCOL(img->pal[i].g) << 4) | | |
| 178 (DMCOL(img->pal[i].b)); | |
| 179 } | |
| 180 else | |
| 181 color = 0; | |
| 182 | |
| 183 fprintf(fp, "\tdc.w $%04X\n", color); | |
| 184 } | |
| 185 | |
|
440
b4ed5292d7bf
Close the file after writing.
Matti Hamalainen <ccr@tnsp.org>
parents:
436
diff
changeset
|
186 fclose(fp); |
| 435 | 187 return 0; |
| 188 } | |
| 189 | |
| 190 | |
| 191 int dmWriteIFFMasterRAWImageFILE(FILE *fp, DMImage *img, DMImageSpec *spec) | |
| 192 { | |
| 193 int xc, yc, plane, res; | |
| 194 DMBitStream bs; | |
| 195 | |
| 196 if ((res = dmInitBitStream(&bs, fp)) != DMERR_OK) | |
| 197 return res; | |
| 198 | |
| 199 if (spec->interleave) | |
| 200 { | |
| 201 // Output bitplanes in interleaved format (each plane of line sequentially) | |
| 202 for (yc = 0; yc < img->height; yc++) | |
| 203 { | |
| 204 for (plane = 0; plane < spec->nplanes; plane++) | |
| 205 { | |
| 206 Uint8 *sp = img->data + yc * img->pitch; | |
| 207 for (xc = 0; xc < img->width; xc++) | |
| 208 { | |
| 209 if (!dmPutBits(&bs, (sp[xc] & (1 << plane)) ? 1 : 0, 1)) | |
| 210 return DMERR_FWRITE; | |
| 211 } | |
| 212 } | |
| 213 } | |
| 214 } | |
| 215 else | |
| 216 { | |
| 217 // Output each bitplane in sequence | |
| 218 for (plane = 0; plane < spec->nplanes; plane++) | |
| 219 { | |
| 220 for (yc = 0; yc < img->height; yc++) | |
| 221 { | |
| 222 Uint8 *sp = img->data + yc * img->pitch; | |
| 223 for (xc = 0; xc < img->width; xc++) | |
| 224 { | |
| 225 if (!dmPutBits(&bs, (sp[xc] & (1 << plane)) ? 1 : 0, 1)) | |
| 226 return DMERR_FWRITE; | |
| 227 } | |
| 228 } | |
| 229 } | |
| 230 } | |
| 231 | |
| 232 return dmFlushBitStream(&bs); | |
| 233 } | |
| 234 | |
| 235 int dmWriteIFFMasterRAWImage(const char *filename, DMImage *img, DMImageSpec *spec) | |
| 236 { | |
| 237 FILE *fp; | |
| 238 int res; | |
| 239 | |
| 240 if ((fp = fopen(filename, "wb")) == NULL) | |
| 241 { | |
| 242 dmError("IFFMasterRAW: Could not open file '%s' for writing.\n", filename); | |
| 243 return DMERR_FOPEN; | |
| 244 } | |
| 245 | |
| 246 res = dmWriteIFFMasterRAWImageFILE(fp, img, spec); | |
| 247 | |
| 248 fclose(fp); | |
| 249 return res; | |
| 250 } | |
| 251 | |
| 252 | |
| 253 static BOOL dmWritePPMRow(void *cbdata, Uint8 *row, size_t len) | |
| 254 { | |
| 255 return fwrite(row, sizeof(Uint8), len, (FILE *) cbdata) == len; | |
| 256 } | |
| 257 | |
| 258 | |
| 259 int dmWritePPMImageFILE(FILE *fp, DMImage *img, DMImageSpec *spec) | |
| 260 { | |
| 261 // Write PPM header | |
| 262 fprintf(fp, | |
| 263 "P6\n%d %d\n255\n", | |
| 264 img->width * spec->scale, | |
| 265 img->height * spec->scale); | |
| 266 | |
| 267 // Write image data | |
| 268 spec->format = DM_IFMT_RGB; | |
| 269 return dmWriteImageData(img, (void *) fp, dmWritePPMRow, spec); | |
| 270 } | |
| 271 | |
| 272 | |
| 273 int dmWritePPMImage(const char *filename, DMImage *img, DMImageSpec *spec) | |
| 274 { | |
| 275 FILE *fp; | |
| 276 int res; | |
| 277 | |
| 278 // Create output file | |
| 279 if ((fp = fopen(filename, "wb")) == NULL) | |
| 280 { | |
| 281 dmError("PPM: could not open file '%s' for writing.\n", filename); | |
| 282 return DMERR_FOPEN; | |
| 283 } | |
| 284 | |
| 285 res = dmWritePPMImageFILE(fp, img, spec); | |
| 286 | |
| 287 fclose(fp); | |
| 288 return res; | |
| 289 } | |
| 290 | |
| 291 | |
| 292 #ifdef DM_USE_LIBPNG | |
| 293 static BOOL dmWritePNGRow(void *cbdata, Uint8 *row, size_t len) | |
| 294 { | |
| 295 png_structp png_ptr = cbdata; | |
| 296 (void) len; | |
| 297 | |
| 298 if (setjmp(png_jmpbuf(png_ptr))) | |
| 299 return FALSE; | |
| 300 | |
| 301 png_write_row(png_ptr, row); | |
| 302 | |
| 303 return TRUE; | |
| 304 } | |
| 305 | |
| 306 | |
| 307 int dmWritePNGImageFILE(FILE *fp, DMImage *img, DMImageSpec *spec) | |
| 308 { | |
| 309 png_structp png_ptr = NULL; | |
| 310 png_infop info_ptr = NULL; | |
| 311 png_colorp palette = NULL; | |
| 312 int fmt, res = DMERR_OK; | |
| 313 | |
| 314 // Create PNG structures | |
| 315 png_ptr = png_create_write_struct( | |
| 316 PNG_LIBPNG_VER_STRING, | |
| 317 NULL, NULL, NULL); | |
| 318 | |
| 319 if (png_ptr == NULL) | |
| 320 { | |
| 321 dmError("PNG: png_create_write_struct() failed.\n"); | |
| 322 res = DMERR_MALLOC; | |
| 323 goto error; | |
| 324 } | |
| 325 | |
| 326 info_ptr = png_create_info_struct(png_ptr); | |
| 327 if (info_ptr == NULL) | |
| 328 { | |
| 329 dmError("PNG: png_create_info_struct(%p) failed.\n", png_ptr); | |
| 330 res = DMERR_INIT_FAIL; | |
| 331 goto error; | |
| 332 } | |
| 333 | |
| 334 if (setjmp(png_jmpbuf(png_ptr))) | |
| 335 { | |
| 336 dmError("PNG: Error during image writing..\n"); | |
| 337 res = DMERR_INIT_FAIL; | |
| 338 goto error; | |
| 339 } | |
| 340 | |
| 341 png_init_io(png_ptr, fp); | |
| 342 | |
| 343 // Write PNG header info | |
| 344 switch (spec->format) | |
| 345 { | |
| 346 case DM_IFMT_PALETTE: fmt = PNG_COLOR_TYPE_PALETTE; break; | |
| 347 case DM_IFMT_RGB : fmt = PNG_COLOR_TYPE_RGB; break; | |
| 348 case DM_IFMT_RGBA : fmt = PNG_COLOR_TYPE_RGB_ALPHA; break; | |
| 349 default: | |
| 350 dmError("PNG: Internal error, unsupported image format %d.\n", spec->format); | |
| 351 goto error; | |
| 352 } | |
| 353 | |
| 354 png_set_IHDR(png_ptr, info_ptr, | |
| 355 img->width * spec->scale, | |
| 356 img->height * spec->scale, | |
| 357 8, /* bits per component */ | |
| 358 fmt, | |
| 359 PNG_INTERLACE_NONE, | |
| 360 PNG_COMPRESSION_TYPE_DEFAULT, | |
| 361 PNG_FILTER_TYPE_DEFAULT); | |
| 362 | |
| 363 // Palette | |
| 364 if (spec->format == DM_IFMT_PALETTE) | |
| 365 { | |
| 366 int i; | |
| 367 | |
| 368 palette = png_malloc(png_ptr, PNG_MAX_PALETTE_LENGTH * sizeof(png_color)); | |
| 369 if (palette == NULL) | |
| 370 { | |
| 371 dmError("PNG: Could not allocate palette structure."); | |
| 372 goto error; | |
| 373 } | |
| 374 | |
| 375 memset(palette, 0, PNG_MAX_PALETTE_LENGTH * sizeof(png_color)); | |
| 376 | |
| 377 for (i = 0; i < img->ncolors; i++) | |
| 378 { | |
| 379 palette[i].red = img->pal[i].r; | |
| 380 palette[i].green = img->pal[i].g; | |
| 381 palette[i].blue = img->pal[i].b; | |
| 382 } | |
| 383 | |
| 384 png_set_PLTE(png_ptr, info_ptr, palette, PNG_MAX_PALETTE_LENGTH); | |
| 385 } | |
| 386 | |
| 387 // png_set_gAMA(png_ptr, info_ptr, 2.2); | |
| 388 | |
| 389 png_write_info(png_ptr, info_ptr); | |
| 390 | |
| 391 | |
| 392 // Write compressed image data | |
| 393 dmWriteImageData(img, (void *) png_ptr, dmWritePNGRow, spec); | |
| 394 | |
| 395 // Write footer | |
| 396 png_write_end(png_ptr, NULL); | |
| 397 | |
| 398 error: | |
| 399 png_free(png_ptr, palette); | |
| 400 palette = NULL; | |
| 401 | |
| 402 if (png_ptr && info_ptr) | |
| 403 png_destroy_write_struct(&png_ptr, &info_ptr); | |
| 404 | |
| 405 return res; | |
| 406 } | |
| 407 | |
| 408 | |
| 409 int dmWritePNGImage(const char *filename, DMImage *img, DMImageSpec *spec) | |
| 410 { | |
| 411 int res; | |
| 412 FILE *fp; | |
| 413 | |
| 414 if ((fp = fopen(filename, "wb")) == NULL) | |
| 415 { | |
| 416 dmError("PNG: could not open file '%s' for writing.\n", filename); | |
| 417 return DMERR_FOPEN; | |
| 418 } | |
| 419 | |
| 420 res = dmWritePNGImageFILE(fp, img, spec); | |
| 421 | |
| 422 fclose(fp); | |
| 423 return res; | |
| 424 } | |
| 425 #endif | |
| 426 | |
| 427 | |
| 428 typedef struct | |
| 429 { | |
| 430 Uint8 r,g,b; | |
| 431 } DMPCXColor; | |
| 432 | |
| 433 | |
| 434 typedef struct | |
| 435 { | |
| 436 Uint8 manufacturer, | |
| 437 version, | |
| 438 encoding, | |
| 439 bpp; | |
| 440 Uint16 xmin, ymin, xmax, ymax; | |
| 441 Uint16 hres, vres; | |
| 442 DMPCXColor colormap[16]; | |
| 443 Uint8 reserved; | |
| 444 Uint8 nplanes; | |
| 445 Uint16 bpl; | |
| 446 Uint16 palinfo; | |
| 447 Uint8 filler[58]; | |
| 448 } DMPCXHeader; | |
| 449 | |
| 450 | |
| 451 typedef struct | |
| 452 { | |
| 453 DMPCXHeader *header; | |
| 454 Uint8 *buf; | |
| 455 size_t bufLen, bufOffs; | |
| 456 int format; | |
| 457 FILE *fp; | |
| 458 } DMPCXData; | |
| 459 | |
| 460 | |
| 461 static inline Uint8 dmPCXGetByte(Uint8 *row, const size_t len, const size_t soffs) | |
| 462 { | |
| 463 return (soffs < len) ? row[soffs] : 0; | |
| 464 } | |
| 465 | |
| 466 static BOOL dmPCXFlush(DMPCXData *pcx) | |
| 467 { | |
| 468 BOOL ret = TRUE; | |
| 469 if (pcx->bufOffs > 0) | |
| 470 ret = fwrite(pcx->buf, sizeof(Uint8), pcx->bufOffs, pcx->fp) == pcx->bufOffs; | |
| 471 pcx->bufOffs = 0; | |
| 472 return ret; | |
| 473 } | |
| 474 | |
| 475 static inline BOOL dmPCXPutByte(DMPCXData *pcx, const Uint8 val) | |
| 476 { | |
| 477 if (pcx->bufOffs < pcx->bufLen) | |
| 478 { | |
| 479 pcx->buf[pcx->bufOffs++] = val; | |
| 480 return TRUE; | |
| 481 } | |
| 482 else | |
| 483 return dmPCXFlush(pcx); | |
| 484 } | |
| 485 | |
| 486 static BOOL dmWritePCXRow(void *cbdata, Uint8 *row, size_t len) | |
| 487 { | |
| 488 DMPCXData *pcx = (DMPCXData *) cbdata; | |
| 489 int plane; | |
| 490 size_t soffs = 0; | |
| 491 | |
| 492 // fprintf(stderr, "%d, %d * %d = %d\n", len, pcx->header->bpl, pcx->header->nplanes, pcx->header->nplanes * pcx->header->bpl); | |
| 493 | |
| 494 pcx->bufOffs = 0; | |
| 495 | |
| 496 for (plane = 0; plane < pcx->header->nplanes; plane++) | |
| 497 { | |
| 498 Uint8 data = dmPCXGetByte(row, len, soffs++), | |
| 499 count = 1; | |
| 500 | |
| 501 // size_t blen = pcx->header->bpl * pcx->header->nplanes; | |
| 502 size_t blen = pcx->header->bpl; | |
| 503 while (soffs < blen) | |
| 504 { | |
| 505 if (data == dmPCXGetByte(row, len, soffs) && count < 63) | |
| 506 { | |
| 507 count++; | |
| 508 soffs++; | |
| 509 } | |
| 510 else | |
| 511 { | |
| 512 if (count == 1 && (data & 0xC0) != 0xC0) | |
| 513 { | |
| 514 if (!dmPCXPutByte(pcx, data)) | |
| 515 return FALSE; | |
| 516 } | |
| 517 else | |
| 518 { | |
| 519 if (!dmPCXPutByte(pcx, 0xC0 | count) || | |
| 520 !dmPCXPutByte(pcx, data)) | |
| 521 return FALSE; | |
| 522 } | |
| 523 | |
| 524 data = dmPCXGetByte(row, len, soffs++); | |
| 525 count = 1; | |
| 526 } | |
| 527 } | |
| 528 | |
| 529 if (count > 1) | |
| 530 { | |
| 531 if (!dmPCXPutByte(pcx, 0xC0 | count) || | |
| 532 !dmPCXPutByte(pcx, data)) | |
| 533 return FALSE; | |
| 534 } | |
| 535 | |
| 536 if (!dmPCXFlush(pcx)) | |
| 537 return FALSE; | |
| 538 } | |
| 539 | |
| 540 | |
| 541 return TRUE; | |
| 542 } | |
| 543 | |
| 544 | |
| 545 int dmWritePCXImageFILE(FILE *fp, DMImage *img, DMImageSpec *spec) | |
| 546 { | |
| 547 DMPCXData pcx; | |
| 548 DMPCXHeader hdr; | |
| 549 int res; | |
| 550 | |
| 551 // Create output file | |
| 552 pcx.buf = NULL; | |
| 553 pcx.format = spec->paletted ? DM_IFMT_PALETTE : DM_IFMT_RGB_PLANE; | |
| 554 pcx.header = &hdr; | |
| 555 pcx.fp = fp; | |
| 556 | |
| 557 // Create PCX header | |
| 558 memset(&hdr, 0, sizeof(hdr)); | |
| 559 if (spec->paletted) | |
| 560 { | |
| 561 int i; | |
| 562 for (i = 0; i < (img->ncolors > 16 ? 16 : img->ncolors); i++) | |
| 563 { | |
| 564 hdr.colormap[i].r = img->pal[i].r; | |
| 565 hdr.colormap[i].g = img->pal[i].g; | |
| 566 hdr.colormap[i].b = img->pal[i].b; | |
| 567 } | |
| 568 } | |
| 569 hdr.manufacturer = 10; | |
| 570 hdr.version = 5; | |
| 571 hdr.encoding = 1; | |
| 572 hdr.bpp = 8; | |
| 573 hdr.hres = img->width * spec->scale; | |
| 574 hdr.vres = img->height * spec->scale; | |
| 575 hdr.xmin = hdr.ymin = 0; | |
| 576 hdr.xmax = hdr.hres - 1; | |
| 577 hdr.ymax = hdr.vres - 1; | |
| 578 hdr.nplanes = dmImageGetBytesPerPixel(pcx.format); | |
| 579 hdr.palinfo = 1; | |
| 580 | |
| 581 res = (img->width * spec->scale); | |
| 582 hdr.bpl = res / 2; | |
| 583 if (res % 2) hdr.bpl++; | |
| 584 hdr.bpl *= 2; | |
| 585 | |
| 586 dmMsg(2, "PCX: paletted=%d, nplanes=%d, bpp=%d, bpl=%d\n", | |
| 587 spec->paletted, hdr.nplanes, hdr.bpp, hdr.bpl); | |
| 588 | |
| 589 pcx.bufLen = hdr.bpl * 4; | |
| 590 if ((pcx.buf = dmMalloc(pcx.bufLen)) == NULL) | |
| 591 { | |
| 592 dmError("PCX: Could not allocate %d bytes for RLE compression buffer.\n", | |
| 593 pcx.bufLen); | |
| 594 res = DMERR_MALLOC; | |
| 595 goto error; | |
| 596 } | |
| 597 | |
| 598 // Write PCX header | |
| 599 if (!dm_fwrite_byte(pcx.fp, hdr.manufacturer) || | |
| 600 !dm_fwrite_byte(pcx.fp, hdr.version) || | |
| 601 !dm_fwrite_byte(pcx.fp, hdr.encoding) || | |
| 602 !dm_fwrite_byte(pcx.fp, hdr.bpp)) | |
| 603 { | |
| 604 dmError("PCX: Could not write basic header data.\n"); | |
| 605 res = DMERR_FWRITE; | |
| 606 goto error; | |
| 607 } | |
| 608 | |
| 609 if (!dm_fwrite_le16(pcx.fp, hdr.xmin) || | |
| 610 !dm_fwrite_le16(pcx.fp, hdr.ymin) || | |
| 611 !dm_fwrite_le16(pcx.fp, hdr.xmax) || | |
| 612 !dm_fwrite_le16(pcx.fp, hdr.ymax) || | |
| 613 !dm_fwrite_le16(pcx.fp, hdr.hres) || | |
| 614 !dm_fwrite_le16(pcx.fp, hdr.vres)) | |
| 615 { | |
| 616 dmError("PCX: Could not write image dimensions.\n"); | |
| 617 res = DMERR_FWRITE; | |
| 618 goto error; | |
| 619 } | |
| 620 | |
| 621 if (!dm_fwrite_str(pcx.fp, (Uint8 *) &hdr.colormap, sizeof(hdr.colormap))) | |
| 622 { | |
| 623 dmError("PCX: Could not write colormap.\n"); | |
| 624 res = DMERR_FWRITE; | |
| 625 goto error; | |
| 626 } | |
| 627 | |
| 628 if (!dm_fwrite_byte(pcx.fp, hdr.reserved) || | |
| 629 !dm_fwrite_byte(pcx.fp, hdr.nplanes) || | |
| 630 !dm_fwrite_le16(pcx.fp, hdr.bpl) || | |
| 631 !dm_fwrite_le16(pcx.fp, hdr.palinfo) || | |
| 632 !dm_fwrite_str(pcx.fp, (Uint8 *) &hdr.filler, sizeof(hdr.filler))) | |
| 633 { | |
| 634 dmError("PCX: Could not write header remainder.\n"); | |
| 635 res = DMERR_FWRITE; | |
| 636 goto error; | |
| 637 } | |
| 638 | |
| 639 // Write image data | |
| 640 res = dmWriteImageData(img, (void *) &pcx, dmWritePCXRow, spec); | |
| 641 | |
| 642 // Write VGA palette | |
| 643 if (spec->paletted) | |
| 644 { | |
| 645 int i; | |
| 646 dm_fwrite_byte(pcx.fp, 0x0C); | |
| 647 dmMsg(2, "PCX: Writing palette of %d active entries.\n", img->ncolors); | |
| 648 | |
| 649 for (i = 0; i < img->ncolors; i++) | |
| 650 { | |
| 651 dm_fwrite_byte(pcx.fp, img->pal[i].r); | |
| 652 dm_fwrite_byte(pcx.fp, img->pal[i].g); | |
| 653 dm_fwrite_byte(pcx.fp, img->pal[i].b); | |
| 654 } | |
| 655 | |
| 656 // Pad the palette, if necessary | |
| 657 for (; i < 256; i++) | |
| 658 { | |
| 659 dm_fwrite_byte(pcx.fp, 0); | |
| 660 dm_fwrite_byte(pcx.fp, 0); | |
| 661 dm_fwrite_byte(pcx.fp, 0); | |
| 662 } | |
| 663 } | |
| 664 | |
| 665 error: | |
| 666 dmFree(pcx.buf); | |
| 667 return res; | |
| 668 } | |
| 669 | |
| 670 | |
| 671 int dmWritePCXImage(const char *filename, DMImage *img, DMImageSpec *spec) | |
| 672 { | |
| 673 FILE *fp; | |
| 674 int res; | |
| 675 | |
| 676 if ((fp = fopen(filename, "wb")) == NULL) | |
| 677 { | |
| 678 dmError("PCX: Could not open file '%s' for writing.\n", filename); | |
| 679 return DMERR_FOPEN; | |
| 680 } | |
| 681 | |
| 682 res = dmWritePCXImageFILE(fp, img, spec); | |
| 683 | |
| 684 fclose(fp); | |
| 685 return res; | |
| 686 } | |
| 687 | |
| 688 | |
| 689 static BOOL dmPCXDecodeRLERow(FILE *fp, Uint8 *buf, const size_t bufLen) | |
| 690 { | |
| 691 size_t offs = 0; | |
| 692 do | |
| 693 { | |
| 694 int count; | |
| 695 Uint8 data; | |
| 696 | |
| 697 if (!dm_fread_byte(fp, &data)) | |
| 698 return FALSE; | |
| 699 | |
| 700 if ((data & 0xC0) == 0xC0) | |
| 701 { | |
| 702 count = data & 0x3F; | |
| 703 if (!dm_fread_byte(fp, &data)) | |
| 704 return FALSE; | |
| 705 } | |
| 706 else | |
| 707 count = 1; | |
| 708 | |
| 709 while (count-- && offs < bufLen) | |
| 710 buf[offs++] = data; | |
| 711 | |
| 712 } while (offs < bufLen); | |
| 713 | |
| 714 return TRUE; | |
| 715 } | |
| 716 | |
| 717 | |
| 718 int dmReadPCXImageFILE(FILE *fp, DMImage **pimg) | |
| 719 { | |
| 720 DMImage *img; | |
| 721 DMPCXData pcx; | |
| 722 DMPCXHeader hdr; | |
| 723 BOOL paletted; | |
| 724 int res = 0, yc, xc; | |
| 725 Uint8 *dp; | |
| 726 | |
| 727 pcx.buf = NULL; | |
| 728 | |
| 729 // Read PCX header | |
| 730 if (!dm_fread_byte(fp, &hdr.manufacturer) || | |
| 731 !dm_fread_byte(fp, &hdr.version) || | |
| 732 !dm_fread_byte(fp, &hdr.encoding) || | |
| 733 !dm_fread_byte(fp, &hdr.bpp)) | |
| 734 { | |
| 735 dmError("PCX: Could not read basic header data.\n"); | |
| 736 res = DMERR_FREAD; | |
| 737 goto error; | |
| 738 } | |
| 739 | |
| 740 if (hdr.manufacturer != 10 || | |
| 741 hdr.version != 5 || | |
| 742 hdr.encoding != 1 || | |
| 743 hdr.bpp != 8) | |
| 744 { | |
| 745 dmError("PCX: Not a PCX file, or unsupported variant.\n"); | |
| 746 res = DMERR_FREAD; | |
| 747 goto error; | |
| 748 } | |
| 749 | |
| 750 if (!dm_fread_le16(fp, &hdr.xmin) || | |
| 751 !dm_fread_le16(fp, &hdr.ymin) || | |
| 752 !dm_fread_le16(fp, &hdr.xmax) || | |
| 753 !dm_fread_le16(fp, &hdr.ymax) || | |
| 754 !dm_fread_le16(fp, &hdr.hres) || | |
| 755 !dm_fread_le16(fp, &hdr.vres)) | |
| 756 { | |
| 757 dmError("PCX: Could not read image dimensions.\n"); | |
| 758 res = DMERR_FREAD; | |
| 759 goto error; | |
| 760 } | |
| 761 | |
| 762 if (!dm_fread_str(fp, (Uint8 *) &hdr.colormap, sizeof(hdr.colormap))) | |
| 763 { | |
| 764 dmError("PCX: Could not read colormap.\n"); | |
| 765 res = DMERR_FREAD; | |
| 766 goto error; | |
| 767 } | |
| 768 | |
| 769 if (!dm_fread_byte(fp, &hdr.reserved) || | |
| 770 !dm_fread_byte(fp, &hdr.nplanes) || | |
| 771 !dm_fread_le16(fp, &hdr.bpl) || | |
| 772 !dm_fread_le16(fp, &hdr.palinfo) || | |
| 773 !dm_fread_str(fp, (Uint8 *) &hdr.filler, sizeof(hdr.filler))) | |
| 774 { | |
| 775 dmError("PCX: Could not read header remainder.\n"); | |
| 776 res = DMERR_FREAD; | |
| 777 goto error; | |
| 778 } | |
| 779 | |
| 780 if (hdr.nplanes != 3 && hdr.nplanes != 1) | |
| 781 { | |
| 782 dmError("PCX: Unsupported number of bitplanes %d.\n", hdr.nplanes); | |
| 783 res = DMERR_FREAD; | |
| 784 goto error; | |
| 785 } | |
| 786 | |
| 787 // Allocate image | |
| 788 if ((*pimg = img = dmImageAlloc(hdr.xmax - hdr.xmin + 1, hdr.ymax - hdr.ymin + 1)) == NULL) | |
| 789 { | |
| 790 dmError("PCX: Could not allocate image structure.\n"); | |
| 791 res = DMERR_MALLOC; | |
| 792 goto error; | |
| 793 } | |
| 794 | |
| 795 paletted = hdr.nplanes == 1; | |
| 796 pcx.bufLen = hdr.nplanes * hdr.bpl; | |
| 797 if ((pcx.buf = dmMalloc(pcx.bufLen)) == NULL) | |
| 798 { | |
| 799 dmError("PCX: Could not allocate RLE buffer.\n"); | |
| 800 res = DMERR_MALLOC; | |
| 801 goto error; | |
| 802 } | |
| 803 | |
| 804 // Read image data | |
| 805 dp = img->data; | |
| 806 for (yc = 0; yc < img->height; yc++) | |
| 807 { | |
| 808 // Decode row of RLE'd data | |
| 809 if (!dmPCXDecodeRLERow(fp, pcx.buf, pcx.bufLen)) | |
| 810 { | |
| 811 dmError("PCX: Error decoding RLE data.\n"); | |
| 812 res = DMERR_INVALID_DATA; | |
| 813 goto error; | |
| 814 } | |
| 815 | |
| 816 // Decode bitplanes | |
| 817 switch (hdr.nplanes) | |
| 818 { | |
| 819 case 1: | |
| 820 memcpy(dp, pcx.buf, img->width); | |
| 821 break; | |
| 822 | |
| 823 case 3: | |
| 824 { | |
| 825 Uint8 *dptr = dp, | |
| 826 *sptr1 = pcx.buf, | |
| 827 *sptr2 = sptr1 + hdr.bpl, | |
| 828 *sptr3 = sptr2 + hdr.bpl; | |
| 829 | |
| 830 for (xc = 0; xc < img->width; xc++) | |
| 831 { | |
| 832 *dptr++ = *sptr1++; | |
| 833 *dptr++ = *sptr2++; | |
| 834 *dptr++ = *sptr3++; | |
| 835 } | |
| 836 } | |
| 837 break; | |
| 838 } | |
| 839 | |
| 840 dp += img->pitch; | |
| 841 } | |
| 842 | |
| 843 // Read VGA palette | |
| 844 if (paletted) | |
| 845 { | |
| 846 int i; | |
| 847 Uint8 tmpb; | |
| 848 BOOL read; | |
| 849 | |
| 850 if (!dm_fread_byte(fp, &tmpb) || tmpb != 0x0C) | |
| 851 { | |
| 852 read = FALSE; | |
| 853 img->ncolors = 16; | |
| 854 } | |
| 855 else | |
| 856 { | |
| 857 read = TRUE; | |
| 858 img->ncolors = 256; | |
| 859 } | |
| 860 | |
| 861 if ((img->pal = dmCalloc(img->ncolors, sizeof(DMColor))) == NULL) | |
| 862 { | |
| 863 dmError("PCX: Could not allocate palette data!\n"); | |
| 864 res = DMERR_MALLOC; | |
| 865 goto error; | |
| 866 } | |
| 867 | |
| 868 if (read) | |
| 869 { | |
| 870 for (i = 0; i < img->ncolors; i++) | |
| 871 { | |
| 872 Uint8 tmpR, tmpG, tmpB; | |
| 873 if (!dm_fread_byte(fp, &tmpR) || | |
| 874 !dm_fread_byte(fp, &tmpG) || | |
| 875 !dm_fread_byte(fp, &tmpB)) | |
| 876 goto error; | |
| 877 | |
| 878 img->pal[i].r = tmpR; | |
| 879 img->pal[i].g = tmpG; | |
| 880 img->pal[i].b = tmpB; | |
| 881 } | |
| 882 } | |
| 883 else | |
| 884 { | |
| 885 for (i = 0; i < img->ncolors; i++) | |
| 886 { | |
| 887 if (i < 16) | |
| 888 { | |
| 889 img->pal[i].r = hdr.colormap[i].r; | |
| 890 img->pal[i].g = hdr.colormap[i].g; | |
| 891 img->pal[i].b = hdr.colormap[i].b; | |
| 892 } | |
| 893 } | |
| 894 } | |
| 895 | |
| 896 | |
| 897 } | |
| 898 | |
| 899 error: | |
| 900 dmFree(pcx.buf); | |
| 901 return res; | |
| 902 } | |
| 903 | |
| 904 | |
| 905 int dmReadPCXImage(const char *filename, DMImage **pimg) | |
| 906 { | |
| 907 FILE *fp; | |
| 908 int res; | |
| 909 | |
| 910 if ((fp = fopen(filename, "rb")) == NULL) | |
| 911 { | |
| 912 dmError("PCX: Could not open file '%s' for reading.\n", filename); | |
| 913 return -15; | |
| 914 } | |
| 915 | |
| 916 res = dmReadPCXImageFILE(fp, pimg); | |
| 917 | |
| 918 fclose(fp); | |
| 919 return res; | |
| 920 } | |
| 921 | |
| 922 | |
| 923 static int fmtProbePNG(const Uint8 *buf, const size_t len) | |
| 924 { | |
| 925 if (len > 64 && buf[0] == 0x89 && | |
| 926 buf[1] == 'P' && buf[2] == 'N' && buf[3] == 'G' && | |
| 927 buf[4] == 0x0d && buf[5] == 0x0a) | |
| 928 return DM_PROBE_SCORE_GOOD; | |
| 929 | |
| 930 return DM_PROBE_SCORE_FALSE; | |
| 931 } | |
| 932 | |
| 933 | |
| 934 static int fmtProbePCX(const Uint8 *buf, const size_t len) | |
| 935 { | |
| 936 if (len > 128 + 64 && | |
| 937 buf[0] == 10 && | |
| 938 buf[1] == 5 && | |
| 939 buf[2] == 1 && | |
| 940 buf[3] == 8) | |
| 941 return DM_PROBE_SCORE_GOOD; | |
| 942 | |
| 943 return DM_PROBE_SCORE_FALSE; | |
| 944 } | |
| 945 | |
| 946 | |
| 947 DMImageFormat dmImageFormatList[IMGFMT_LAST] = | |
| 948 { | |
| 949 { | |
| 950 "PNG", "Portable Network Graphics", | |
| 951 fmtProbePNG, | |
| 952 NULL, NULL, | |
| 953 #ifdef DM_USE_LIBPNG | |
| 954 dmWritePNGImage, dmWritePNGImageFILE, | |
| 955 #else | |
| 956 NULL, NULL, | |
| 957 #endif | |
| 958 }, | |
| 959 { | |
| 960 "PPM", "Portable PixMap", | |
| 961 NULL, | |
| 962 NULL, NULL, | |
| 963 dmWritePPMImage, dmWritePPMImageFILE, | |
| 964 }, | |
| 965 { | |
| 966 "PCX", "Z-Soft Paintbrush", | |
| 967 fmtProbePCX, | |
| 968 dmReadPCXImage, dmReadPCXImageFILE, | |
| 969 dmWritePCXImage, dmWritePCXImageFILE, | |
| 970 }, | |
| 971 { | |
| 972 "ARAW", "IFFMaster Amiga RAW", | |
| 973 NULL, | |
| 974 NULL, NULL, | |
| 975 dmWriteIFFMasterRAWImage, dmWriteIFFMasterRAWImageFILE, | |
| 976 } | |
| 977 }; | |
| 978 | |
| 979 | |
| 980 int dmImageProbeGeneric(const Uint8 *buf, const size_t len, DMImageFormat **pfmt, int *index) | |
| 981 { | |
| 982 int i, scoreMax = DM_PROBE_SCORE_FALSE, scoreIndex = -1; | |
| 983 | |
| 984 for (i = 0; i < IMGFMT_LAST; i++) | |
| 985 { | |
| 986 DMImageFormat *fmt = &dmImageFormatList[i]; | |
| 987 int score = fmt->probe(buf, len); | |
| 988 if (score > scoreMax) | |
| 989 { | |
| 990 scoreMax = score; | |
| 991 scoreIndex = i; | |
| 992 } | |
| 993 } | |
| 994 | |
| 995 if (scoreIndex >= 0) | |
| 996 { | |
| 997 *pfmt = &dmImageFormatList[scoreIndex]; | |
| 998 *index = scoreIndex; | |
| 999 return scoreMax; | |
| 1000 } | |
| 1001 else | |
| 1002 return DM_PROBE_SCORE_FALSE; | |
| 1003 } |