Mercurial > hg > dmlib
annotate libgfx.c @ 436:86f956e4580f
Cosmetics, rename a variable.
| author | Matti Hamalainen <ccr@tnsp.org> |
|---|---|
| date | Sun, 04 Nov 2012 02:50:03 +0200 |
| parents | e4a3f183e463 |
| children | b4ed5292d7bf |
| 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 | |
| 186 return 0; | |
| 187 } | |
| 188 | |
| 189 | |
| 190 int dmWriteIFFMasterRAWImageFILE(FILE *fp, DMImage *img, DMImageSpec *spec) | |
| 191 { | |
| 192 int xc, yc, plane, res; | |
| 193 DMBitStream bs; | |
| 194 | |
| 195 if ((res = dmInitBitStream(&bs, fp)) != DMERR_OK) | |
| 196 return res; | |
| 197 | |
| 198 if (spec->interleave) | |
| 199 { | |
| 200 // Output bitplanes in interleaved format (each plane of line sequentially) | |
| 201 for (yc = 0; yc < img->height; yc++) | |
| 202 { | |
| 203 for (plane = 0; plane < spec->nplanes; plane++) | |
| 204 { | |
| 205 Uint8 *sp = img->data + yc * img->pitch; | |
| 206 for (xc = 0; xc < img->width; xc++) | |
| 207 { | |
| 208 if (!dmPutBits(&bs, (sp[xc] & (1 << plane)) ? 1 : 0, 1)) | |
| 209 return DMERR_FWRITE; | |
| 210 } | |
| 211 } | |
| 212 } | |
| 213 } | |
| 214 else | |
| 215 { | |
| 216 // Output each bitplane in sequence | |
| 217 for (plane = 0; plane < spec->nplanes; plane++) | |
| 218 { | |
| 219 for (yc = 0; yc < img->height; yc++) | |
| 220 { | |
| 221 Uint8 *sp = img->data + yc * img->pitch; | |
| 222 for (xc = 0; xc < img->width; xc++) | |
| 223 { | |
| 224 if (!dmPutBits(&bs, (sp[xc] & (1 << plane)) ? 1 : 0, 1)) | |
| 225 return DMERR_FWRITE; | |
| 226 } | |
| 227 } | |
| 228 } | |
| 229 } | |
| 230 | |
| 231 return dmFlushBitStream(&bs); | |
| 232 } | |
| 233 | |
| 234 int dmWriteIFFMasterRAWImage(const char *filename, DMImage *img, DMImageSpec *spec) | |
| 235 { | |
| 236 FILE *fp; | |
| 237 int res; | |
| 238 | |
| 239 if ((fp = fopen(filename, "wb")) == NULL) | |
| 240 { | |
| 241 dmError("IFFMasterRAW: Could not open file '%s' for writing.\n", filename); | |
| 242 return DMERR_FOPEN; | |
| 243 } | |
| 244 | |
| 245 res = dmWriteIFFMasterRAWImageFILE(fp, img, spec); | |
| 246 | |
| 247 fclose(fp); | |
| 248 return res; | |
| 249 } | |
| 250 | |
| 251 | |
| 252 static BOOL dmWritePPMRow(void *cbdata, Uint8 *row, size_t len) | |
| 253 { | |
| 254 return fwrite(row, sizeof(Uint8), len, (FILE *) cbdata) == len; | |
| 255 } | |
| 256 | |
| 257 | |
| 258 int dmWritePPMImageFILE(FILE *fp, DMImage *img, DMImageSpec *spec) | |
| 259 { | |
| 260 // Write PPM header | |
| 261 fprintf(fp, | |
| 262 "P6\n%d %d\n255\n", | |
| 263 img->width * spec->scale, | |
| 264 img->height * spec->scale); | |
| 265 | |
| 266 // Write image data | |
| 267 spec->format = DM_IFMT_RGB; | |
| 268 return dmWriteImageData(img, (void *) fp, dmWritePPMRow, spec); | |
| 269 } | |
| 270 | |
| 271 | |
| 272 int dmWritePPMImage(const char *filename, DMImage *img, DMImageSpec *spec) | |
| 273 { | |
| 274 FILE *fp; | |
| 275 int res; | |
| 276 | |
| 277 // Create output file | |
| 278 if ((fp = fopen(filename, "wb")) == NULL) | |
| 279 { | |
| 280 dmError("PPM: could not open file '%s' for writing.\n", filename); | |
| 281 return DMERR_FOPEN; | |
| 282 } | |
| 283 | |
| 284 res = dmWritePPMImageFILE(fp, img, spec); | |
| 285 | |
| 286 fclose(fp); | |
| 287 return res; | |
| 288 } | |
| 289 | |
| 290 | |
| 291 #ifdef DM_USE_LIBPNG | |
| 292 static BOOL dmWritePNGRow(void *cbdata, Uint8 *row, size_t len) | |
| 293 { | |
| 294 png_structp png_ptr = cbdata; | |
| 295 (void) len; | |
| 296 | |
| 297 if (setjmp(png_jmpbuf(png_ptr))) | |
| 298 return FALSE; | |
| 299 | |
| 300 png_write_row(png_ptr, row); | |
| 301 | |
| 302 return TRUE; | |
| 303 } | |
| 304 | |
| 305 | |
| 306 int dmWritePNGImageFILE(FILE *fp, DMImage *img, DMImageSpec *spec) | |
| 307 { | |
| 308 png_structp png_ptr = NULL; | |
| 309 png_infop info_ptr = NULL; | |
| 310 png_colorp palette = NULL; | |
| 311 int fmt, res = DMERR_OK; | |
| 312 | |
| 313 // Create PNG structures | |
| 314 png_ptr = png_create_write_struct( | |
| 315 PNG_LIBPNG_VER_STRING, | |
| 316 NULL, NULL, NULL); | |
| 317 | |
| 318 if (png_ptr == NULL) | |
| 319 { | |
| 320 dmError("PNG: png_create_write_struct() failed.\n"); | |
| 321 res = DMERR_MALLOC; | |
| 322 goto error; | |
| 323 } | |
| 324 | |
| 325 info_ptr = png_create_info_struct(png_ptr); | |
| 326 if (info_ptr == NULL) | |
| 327 { | |
| 328 dmError("PNG: png_create_info_struct(%p) failed.\n", png_ptr); | |
| 329 res = DMERR_INIT_FAIL; | |
| 330 goto error; | |
| 331 } | |
| 332 | |
| 333 if (setjmp(png_jmpbuf(png_ptr))) | |
| 334 { | |
| 335 dmError("PNG: Error during image writing..\n"); | |
| 336 res = DMERR_INIT_FAIL; | |
| 337 goto error; | |
| 338 } | |
| 339 | |
| 340 png_init_io(png_ptr, fp); | |
| 341 | |
| 342 // Write PNG header info | |
| 343 switch (spec->format) | |
| 344 { | |
| 345 case DM_IFMT_PALETTE: fmt = PNG_COLOR_TYPE_PALETTE; break; | |
| 346 case DM_IFMT_RGB : fmt = PNG_COLOR_TYPE_RGB; break; | |
| 347 case DM_IFMT_RGBA : fmt = PNG_COLOR_TYPE_RGB_ALPHA; break; | |
| 348 default: | |
| 349 dmError("PNG: Internal error, unsupported image format %d.\n", spec->format); | |
| 350 goto error; | |
| 351 } | |
| 352 | |
| 353 png_set_IHDR(png_ptr, info_ptr, | |
| 354 img->width * spec->scale, | |
| 355 img->height * spec->scale, | |
| 356 8, /* bits per component */ | |
| 357 fmt, | |
| 358 PNG_INTERLACE_NONE, | |
| 359 PNG_COMPRESSION_TYPE_DEFAULT, | |
| 360 PNG_FILTER_TYPE_DEFAULT); | |
| 361 | |
| 362 // Palette | |
| 363 if (spec->format == DM_IFMT_PALETTE) | |
| 364 { | |
| 365 int i; | |
| 366 | |
| 367 palette = png_malloc(png_ptr, PNG_MAX_PALETTE_LENGTH * sizeof(png_color)); | |
| 368 if (palette == NULL) | |
| 369 { | |
| 370 dmError("PNG: Could not allocate palette structure."); | |
| 371 goto error; | |
| 372 } | |
| 373 | |
| 374 memset(palette, 0, PNG_MAX_PALETTE_LENGTH * sizeof(png_color)); | |
| 375 | |
| 376 for (i = 0; i < img->ncolors; i++) | |
| 377 { | |
| 378 palette[i].red = img->pal[i].r; | |
| 379 palette[i].green = img->pal[i].g; | |
| 380 palette[i].blue = img->pal[i].b; | |
| 381 } | |
| 382 | |
| 383 png_set_PLTE(png_ptr, info_ptr, palette, PNG_MAX_PALETTE_LENGTH); | |
| 384 } | |
| 385 | |
| 386 // png_set_gAMA(png_ptr, info_ptr, 2.2); | |
| 387 | |
| 388 png_write_info(png_ptr, info_ptr); | |
| 389 | |
| 390 | |
| 391 // Write compressed image data | |
| 392 dmWriteImageData(img, (void *) png_ptr, dmWritePNGRow, spec); | |
| 393 | |
| 394 // Write footer | |
| 395 png_write_end(png_ptr, NULL); | |
| 396 | |
| 397 error: | |
| 398 png_free(png_ptr, palette); | |
| 399 palette = NULL; | |
| 400 | |
| 401 if (png_ptr && info_ptr) | |
| 402 png_destroy_write_struct(&png_ptr, &info_ptr); | |
| 403 | |
| 404 return res; | |
| 405 } | |
| 406 | |
| 407 | |
| 408 int dmWritePNGImage(const char *filename, DMImage *img, DMImageSpec *spec) | |
| 409 { | |
| 410 int res; | |
| 411 FILE *fp; | |
| 412 | |
| 413 if ((fp = fopen(filename, "wb")) == NULL) | |
| 414 { | |
| 415 dmError("PNG: could not open file '%s' for writing.\n", filename); | |
| 416 return DMERR_FOPEN; | |
| 417 } | |
| 418 | |
| 419 res = dmWritePNGImageFILE(fp, img, spec); | |
| 420 | |
| 421 fclose(fp); | |
| 422 return res; | |
| 423 } | |
| 424 #endif | |
| 425 | |
| 426 | |
| 427 typedef struct | |
| 428 { | |
| 429 Uint8 r,g,b; | |
| 430 } DMPCXColor; | |
| 431 | |
| 432 | |
| 433 typedef struct | |
| 434 { | |
| 435 Uint8 manufacturer, | |
| 436 version, | |
| 437 encoding, | |
| 438 bpp; | |
| 439 Uint16 xmin, ymin, xmax, ymax; | |
| 440 Uint16 hres, vres; | |
| 441 DMPCXColor colormap[16]; | |
| 442 Uint8 reserved; | |
| 443 Uint8 nplanes; | |
| 444 Uint16 bpl; | |
| 445 Uint16 palinfo; | |
| 446 Uint8 filler[58]; | |
| 447 } DMPCXHeader; | |
| 448 | |
| 449 | |
| 450 typedef struct | |
| 451 { | |
| 452 DMPCXHeader *header; | |
| 453 Uint8 *buf; | |
| 454 size_t bufLen, bufOffs; | |
| 455 int format; | |
| 456 FILE *fp; | |
| 457 } DMPCXData; | |
| 458 | |
| 459 | |
| 460 static inline Uint8 dmPCXGetByte(Uint8 *row, const size_t len, const size_t soffs) | |
| 461 { | |
| 462 return (soffs < len) ? row[soffs] : 0; | |
| 463 } | |
| 464 | |
| 465 static BOOL dmPCXFlush(DMPCXData *pcx) | |
| 466 { | |
| 467 BOOL ret = TRUE; | |
| 468 if (pcx->bufOffs > 0) | |
| 469 ret = fwrite(pcx->buf, sizeof(Uint8), pcx->bufOffs, pcx->fp) == pcx->bufOffs; | |
| 470 pcx->bufOffs = 0; | |
| 471 return ret; | |
| 472 } | |
| 473 | |
| 474 static inline BOOL dmPCXPutByte(DMPCXData *pcx, const Uint8 val) | |
| 475 { | |
| 476 if (pcx->bufOffs < pcx->bufLen) | |
| 477 { | |
| 478 pcx->buf[pcx->bufOffs++] = val; | |
| 479 return TRUE; | |
| 480 } | |
| 481 else | |
| 482 return dmPCXFlush(pcx); | |
| 483 } | |
| 484 | |
| 485 static BOOL dmWritePCXRow(void *cbdata, Uint8 *row, size_t len) | |
| 486 { | |
| 487 DMPCXData *pcx = (DMPCXData *) cbdata; | |
| 488 int plane; | |
| 489 size_t soffs = 0; | |
| 490 | |
| 491 // fprintf(stderr, "%d, %d * %d = %d\n", len, pcx->header->bpl, pcx->header->nplanes, pcx->header->nplanes * pcx->header->bpl); | |
| 492 | |
| 493 pcx->bufOffs = 0; | |
| 494 | |
| 495 for (plane = 0; plane < pcx->header->nplanes; plane++) | |
| 496 { | |
| 497 Uint8 data = dmPCXGetByte(row, len, soffs++), | |
| 498 count = 1; | |
| 499 | |
| 500 // size_t blen = pcx->header->bpl * pcx->header->nplanes; | |
| 501 size_t blen = pcx->header->bpl; | |
| 502 while (soffs < blen) | |
| 503 { | |
| 504 if (data == dmPCXGetByte(row, len, soffs) && count < 63) | |
| 505 { | |
| 506 count++; | |
| 507 soffs++; | |
| 508 } | |
| 509 else | |
| 510 { | |
| 511 if (count == 1 && (data & 0xC0) != 0xC0) | |
| 512 { | |
| 513 if (!dmPCXPutByte(pcx, data)) | |
| 514 return FALSE; | |
| 515 } | |
| 516 else | |
| 517 { | |
| 518 if (!dmPCXPutByte(pcx, 0xC0 | count) || | |
| 519 !dmPCXPutByte(pcx, data)) | |
| 520 return FALSE; | |
| 521 } | |
| 522 | |
| 523 data = dmPCXGetByte(row, len, soffs++); | |
| 524 count = 1; | |
| 525 } | |
| 526 } | |
| 527 | |
| 528 if (count > 1) | |
| 529 { | |
| 530 if (!dmPCXPutByte(pcx, 0xC0 | count) || | |
| 531 !dmPCXPutByte(pcx, data)) | |
| 532 return FALSE; | |
| 533 } | |
| 534 | |
| 535 if (!dmPCXFlush(pcx)) | |
| 536 return FALSE; | |
| 537 } | |
| 538 | |
| 539 | |
| 540 return TRUE; | |
| 541 } | |
| 542 | |
| 543 | |
| 544 int dmWritePCXImageFILE(FILE *fp, DMImage *img, DMImageSpec *spec) | |
| 545 { | |
| 546 DMPCXData pcx; | |
| 547 DMPCXHeader hdr; | |
| 548 int res; | |
| 549 | |
| 550 // Create output file | |
| 551 pcx.buf = NULL; | |
| 552 pcx.format = spec->paletted ? DM_IFMT_PALETTE : DM_IFMT_RGB_PLANE; | |
| 553 pcx.header = &hdr; | |
| 554 pcx.fp = fp; | |
| 555 | |
| 556 // Create PCX header | |
| 557 memset(&hdr, 0, sizeof(hdr)); | |
| 558 if (spec->paletted) | |
| 559 { | |
| 560 int i; | |
| 561 for (i = 0; i < (img->ncolors > 16 ? 16 : img->ncolors); i++) | |
| 562 { | |
| 563 hdr.colormap[i].r = img->pal[i].r; | |
| 564 hdr.colormap[i].g = img->pal[i].g; | |
| 565 hdr.colormap[i].b = img->pal[i].b; | |
| 566 } | |
| 567 } | |
| 568 hdr.manufacturer = 10; | |
| 569 hdr.version = 5; | |
| 570 hdr.encoding = 1; | |
| 571 hdr.bpp = 8; | |
| 572 hdr.hres = img->width * spec->scale; | |
| 573 hdr.vres = img->height * spec->scale; | |
| 574 hdr.xmin = hdr.ymin = 0; | |
| 575 hdr.xmax = hdr.hres - 1; | |
| 576 hdr.ymax = hdr.vres - 1; | |
| 577 hdr.nplanes = dmImageGetBytesPerPixel(pcx.format); | |
| 578 hdr.palinfo = 1; | |
| 579 | |
| 580 res = (img->width * spec->scale); | |
| 581 hdr.bpl = res / 2; | |
| 582 if (res % 2) hdr.bpl++; | |
| 583 hdr.bpl *= 2; | |
| 584 | |
| 585 dmMsg(2, "PCX: paletted=%d, nplanes=%d, bpp=%d, bpl=%d\n", | |
| 586 spec->paletted, hdr.nplanes, hdr.bpp, hdr.bpl); | |
| 587 | |
| 588 pcx.bufLen = hdr.bpl * 4; | |
| 589 if ((pcx.buf = dmMalloc(pcx.bufLen)) == NULL) | |
| 590 { | |
| 591 dmError("PCX: Could not allocate %d bytes for RLE compression buffer.\n", | |
| 592 pcx.bufLen); | |
| 593 res = DMERR_MALLOC; | |
| 594 goto error; | |
| 595 } | |
| 596 | |
| 597 // Write PCX header | |
| 598 if (!dm_fwrite_byte(pcx.fp, hdr.manufacturer) || | |
| 599 !dm_fwrite_byte(pcx.fp, hdr.version) || | |
| 600 !dm_fwrite_byte(pcx.fp, hdr.encoding) || | |
| 601 !dm_fwrite_byte(pcx.fp, hdr.bpp)) | |
| 602 { | |
| 603 dmError("PCX: Could not write basic header data.\n"); | |
| 604 res = DMERR_FWRITE; | |
| 605 goto error; | |
| 606 } | |
| 607 | |
| 608 if (!dm_fwrite_le16(pcx.fp, hdr.xmin) || | |
| 609 !dm_fwrite_le16(pcx.fp, hdr.ymin) || | |
| 610 !dm_fwrite_le16(pcx.fp, hdr.xmax) || | |
| 611 !dm_fwrite_le16(pcx.fp, hdr.ymax) || | |
| 612 !dm_fwrite_le16(pcx.fp, hdr.hres) || | |
| 613 !dm_fwrite_le16(pcx.fp, hdr.vres)) | |
| 614 { | |
| 615 dmError("PCX: Could not write image dimensions.\n"); | |
| 616 res = DMERR_FWRITE; | |
| 617 goto error; | |
| 618 } | |
| 619 | |
| 620 if (!dm_fwrite_str(pcx.fp, (Uint8 *) &hdr.colormap, sizeof(hdr.colormap))) | |
| 621 { | |
| 622 dmError("PCX: Could not write colormap.\n"); | |
| 623 res = DMERR_FWRITE; | |
| 624 goto error; | |
| 625 } | |
| 626 | |
| 627 if (!dm_fwrite_byte(pcx.fp, hdr.reserved) || | |
| 628 !dm_fwrite_byte(pcx.fp, hdr.nplanes) || | |
| 629 !dm_fwrite_le16(pcx.fp, hdr.bpl) || | |
| 630 !dm_fwrite_le16(pcx.fp, hdr.palinfo) || | |
| 631 !dm_fwrite_str(pcx.fp, (Uint8 *) &hdr.filler, sizeof(hdr.filler))) | |
| 632 { | |
| 633 dmError("PCX: Could not write header remainder.\n"); | |
| 634 res = DMERR_FWRITE; | |
| 635 goto error; | |
| 636 } | |
| 637 | |
| 638 // Write image data | |
| 639 res = dmWriteImageData(img, (void *) &pcx, dmWritePCXRow, spec); | |
| 640 | |
| 641 // Write VGA palette | |
| 642 if (spec->paletted) | |
| 643 { | |
| 644 int i; | |
| 645 dm_fwrite_byte(pcx.fp, 0x0C); | |
| 646 dmMsg(2, "PCX: Writing palette of %d active entries.\n", img->ncolors); | |
| 647 | |
| 648 for (i = 0; i < img->ncolors; i++) | |
| 649 { | |
| 650 dm_fwrite_byte(pcx.fp, img->pal[i].r); | |
| 651 dm_fwrite_byte(pcx.fp, img->pal[i].g); | |
| 652 dm_fwrite_byte(pcx.fp, img->pal[i].b); | |
| 653 } | |
| 654 | |
| 655 // Pad the palette, if necessary | |
| 656 for (; i < 256; i++) | |
| 657 { | |
| 658 dm_fwrite_byte(pcx.fp, 0); | |
| 659 dm_fwrite_byte(pcx.fp, 0); | |
| 660 dm_fwrite_byte(pcx.fp, 0); | |
| 661 } | |
| 662 } | |
| 663 | |
| 664 error: | |
| 665 dmFree(pcx.buf); | |
| 666 return res; | |
| 667 } | |
| 668 | |
| 669 | |
| 670 int dmWritePCXImage(const char *filename, DMImage *img, DMImageSpec *spec) | |
| 671 { | |
| 672 FILE *fp; | |
| 673 int res; | |
| 674 | |
| 675 if ((fp = fopen(filename, "wb")) == NULL) | |
| 676 { | |
| 677 dmError("PCX: Could not open file '%s' for writing.\n", filename); | |
| 678 return DMERR_FOPEN; | |
| 679 } | |
| 680 | |
| 681 res = dmWritePCXImageFILE(fp, img, spec); | |
| 682 | |
| 683 fclose(fp); | |
| 684 return res; | |
| 685 } | |
| 686 | |
| 687 | |
| 688 static BOOL dmPCXDecodeRLERow(FILE *fp, Uint8 *buf, const size_t bufLen) | |
| 689 { | |
| 690 size_t offs = 0; | |
| 691 do | |
| 692 { | |
| 693 int count; | |
| 694 Uint8 data; | |
| 695 | |
| 696 if (!dm_fread_byte(fp, &data)) | |
| 697 return FALSE; | |
| 698 | |
| 699 if ((data & 0xC0) == 0xC0) | |
| 700 { | |
| 701 count = data & 0x3F; | |
| 702 if (!dm_fread_byte(fp, &data)) | |
| 703 return FALSE; | |
| 704 } | |
| 705 else | |
| 706 count = 1; | |
| 707 | |
| 708 while (count-- && offs < bufLen) | |
| 709 buf[offs++] = data; | |
| 710 | |
| 711 } while (offs < bufLen); | |
| 712 | |
| 713 return TRUE; | |
| 714 } | |
| 715 | |
| 716 | |
| 717 int dmReadPCXImageFILE(FILE *fp, DMImage **pimg) | |
| 718 { | |
| 719 DMImage *img; | |
| 720 DMPCXData pcx; | |
| 721 DMPCXHeader hdr; | |
| 722 BOOL paletted; | |
| 723 int res = 0, yc, xc; | |
| 724 Uint8 *dp; | |
| 725 | |
| 726 pcx.buf = NULL; | |
| 727 | |
| 728 // Read PCX header | |
| 729 if (!dm_fread_byte(fp, &hdr.manufacturer) || | |
| 730 !dm_fread_byte(fp, &hdr.version) || | |
| 731 !dm_fread_byte(fp, &hdr.encoding) || | |
| 732 !dm_fread_byte(fp, &hdr.bpp)) | |
| 733 { | |
| 734 dmError("PCX: Could not read basic header data.\n"); | |
| 735 res = DMERR_FREAD; | |
| 736 goto error; | |
| 737 } | |
| 738 | |
| 739 if (hdr.manufacturer != 10 || | |
| 740 hdr.version != 5 || | |
| 741 hdr.encoding != 1 || | |
| 742 hdr.bpp != 8) | |
| 743 { | |
| 744 dmError("PCX: Not a PCX file, or unsupported variant.\n"); | |
| 745 res = DMERR_FREAD; | |
| 746 goto error; | |
| 747 } | |
| 748 | |
| 749 if (!dm_fread_le16(fp, &hdr.xmin) || | |
| 750 !dm_fread_le16(fp, &hdr.ymin) || | |
| 751 !dm_fread_le16(fp, &hdr.xmax) || | |
| 752 !dm_fread_le16(fp, &hdr.ymax) || | |
| 753 !dm_fread_le16(fp, &hdr.hres) || | |
| 754 !dm_fread_le16(fp, &hdr.vres)) | |
| 755 { | |
| 756 dmError("PCX: Could not read image dimensions.\n"); | |
| 757 res = DMERR_FREAD; | |
| 758 goto error; | |
| 759 } | |
| 760 | |
| 761 if (!dm_fread_str(fp, (Uint8 *) &hdr.colormap, sizeof(hdr.colormap))) | |
| 762 { | |
| 763 dmError("PCX: Could not read colormap.\n"); | |
| 764 res = DMERR_FREAD; | |
| 765 goto error; | |
| 766 } | |
| 767 | |
| 768 if (!dm_fread_byte(fp, &hdr.reserved) || | |
| 769 !dm_fread_byte(fp, &hdr.nplanes) || | |
| 770 !dm_fread_le16(fp, &hdr.bpl) || | |
| 771 !dm_fread_le16(fp, &hdr.palinfo) || | |
| 772 !dm_fread_str(fp, (Uint8 *) &hdr.filler, sizeof(hdr.filler))) | |
| 773 { | |
| 774 dmError("PCX: Could not read header remainder.\n"); | |
| 775 res = DMERR_FREAD; | |
| 776 goto error; | |
| 777 } | |
| 778 | |
| 779 if (hdr.nplanes != 3 && hdr.nplanes != 1) | |
| 780 { | |
| 781 dmError("PCX: Unsupported number of bitplanes %d.\n", hdr.nplanes); | |
| 782 res = DMERR_FREAD; | |
| 783 goto error; | |
| 784 } | |
| 785 | |
| 786 // Allocate image | |
| 787 if ((*pimg = img = dmImageAlloc(hdr.xmax - hdr.xmin + 1, hdr.ymax - hdr.ymin + 1)) == NULL) | |
| 788 { | |
| 789 dmError("PCX: Could not allocate image structure.\n"); | |
| 790 res = DMERR_MALLOC; | |
| 791 goto error; | |
| 792 } | |
| 793 | |
| 794 paletted = hdr.nplanes == 1; | |
| 795 pcx.bufLen = hdr.nplanes * hdr.bpl; | |
| 796 if ((pcx.buf = dmMalloc(pcx.bufLen)) == NULL) | |
| 797 { | |
| 798 dmError("PCX: Could not allocate RLE buffer.\n"); | |
| 799 res = DMERR_MALLOC; | |
| 800 goto error; | |
| 801 } | |
| 802 | |
| 803 // Read image data | |
| 804 dp = img->data; | |
| 805 for (yc = 0; yc < img->height; yc++) | |
| 806 { | |
| 807 // Decode row of RLE'd data | |
| 808 if (!dmPCXDecodeRLERow(fp, pcx.buf, pcx.bufLen)) | |
| 809 { | |
| 810 dmError("PCX: Error decoding RLE data.\n"); | |
| 811 res = DMERR_INVALID_DATA; | |
| 812 goto error; | |
| 813 } | |
| 814 | |
| 815 // Decode bitplanes | |
| 816 switch (hdr.nplanes) | |
| 817 { | |
| 818 case 1: | |
| 819 memcpy(dp, pcx.buf, img->width); | |
| 820 break; | |
| 821 | |
| 822 case 3: | |
| 823 { | |
| 824 Uint8 *dptr = dp, | |
| 825 *sptr1 = pcx.buf, | |
| 826 *sptr2 = sptr1 + hdr.bpl, | |
| 827 *sptr3 = sptr2 + hdr.bpl; | |
| 828 | |
| 829 for (xc = 0; xc < img->width; xc++) | |
| 830 { | |
| 831 *dptr++ = *sptr1++; | |
| 832 *dptr++ = *sptr2++; | |
| 833 *dptr++ = *sptr3++; | |
| 834 } | |
| 835 } | |
| 836 break; | |
| 837 } | |
| 838 | |
| 839 dp += img->pitch; | |
| 840 } | |
| 841 | |
| 842 // Read VGA palette | |
| 843 if (paletted) | |
| 844 { | |
| 845 int i; | |
| 846 Uint8 tmpb; | |
| 847 BOOL read; | |
| 848 | |
| 849 if (!dm_fread_byte(fp, &tmpb) || tmpb != 0x0C) | |
| 850 { | |
| 851 read = FALSE; | |
| 852 img->ncolors = 16; | |
| 853 } | |
| 854 else | |
| 855 { | |
| 856 read = TRUE; | |
| 857 img->ncolors = 256; | |
| 858 } | |
| 859 | |
| 860 if ((img->pal = dmCalloc(img->ncolors, sizeof(DMColor))) == NULL) | |
| 861 { | |
| 862 dmError("PCX: Could not allocate palette data!\n"); | |
| 863 res = DMERR_MALLOC; | |
| 864 goto error; | |
| 865 } | |
| 866 | |
| 867 if (read) | |
| 868 { | |
| 869 for (i = 0; i < img->ncolors; i++) | |
| 870 { | |
| 871 Uint8 tmpR, tmpG, tmpB; | |
| 872 if (!dm_fread_byte(fp, &tmpR) || | |
| 873 !dm_fread_byte(fp, &tmpG) || | |
| 874 !dm_fread_byte(fp, &tmpB)) | |
| 875 goto error; | |
| 876 | |
| 877 img->pal[i].r = tmpR; | |
| 878 img->pal[i].g = tmpG; | |
| 879 img->pal[i].b = tmpB; | |
| 880 } | |
| 881 } | |
| 882 else | |
| 883 { | |
| 884 for (i = 0; i < img->ncolors; i++) | |
| 885 { | |
| 886 if (i < 16) | |
| 887 { | |
| 888 img->pal[i].r = hdr.colormap[i].r; | |
| 889 img->pal[i].g = hdr.colormap[i].g; | |
| 890 img->pal[i].b = hdr.colormap[i].b; | |
| 891 } | |
| 892 } | |
| 893 } | |
| 894 | |
| 895 | |
| 896 } | |
| 897 | |
| 898 error: | |
| 899 dmFree(pcx.buf); | |
| 900 return res; | |
| 901 } | |
| 902 | |
| 903 | |
| 904 int dmReadPCXImage(const char *filename, DMImage **pimg) | |
| 905 { | |
| 906 FILE *fp; | |
| 907 int res; | |
| 908 | |
| 909 if ((fp = fopen(filename, "rb")) == NULL) | |
| 910 { | |
| 911 dmError("PCX: Could not open file '%s' for reading.\n", filename); | |
| 912 return -15; | |
| 913 } | |
| 914 | |
| 915 res = dmReadPCXImageFILE(fp, pimg); | |
| 916 | |
| 917 fclose(fp); | |
| 918 return res; | |
| 919 } | |
| 920 | |
| 921 | |
| 922 static int fmtProbePNG(const Uint8 *buf, const size_t len) | |
| 923 { | |
| 924 if (len > 64 && buf[0] == 0x89 && | |
| 925 buf[1] == 'P' && buf[2] == 'N' && buf[3] == 'G' && | |
| 926 buf[4] == 0x0d && buf[5] == 0x0a) | |
| 927 return DM_PROBE_SCORE_GOOD; | |
| 928 | |
| 929 return DM_PROBE_SCORE_FALSE; | |
| 930 } | |
| 931 | |
| 932 | |
| 933 static int fmtProbePCX(const Uint8 *buf, const size_t len) | |
| 934 { | |
| 935 if (len > 128 + 64 && | |
| 936 buf[0] == 10 && | |
| 937 buf[1] == 5 && | |
| 938 buf[2] == 1 && | |
| 939 buf[3] == 8) | |
| 940 return DM_PROBE_SCORE_GOOD; | |
| 941 | |
| 942 return DM_PROBE_SCORE_FALSE; | |
| 943 } | |
| 944 | |
| 945 | |
| 946 DMImageFormat dmImageFormatList[IMGFMT_LAST] = | |
| 947 { | |
| 948 { | |
| 949 "PNG", "Portable Network Graphics", | |
| 950 fmtProbePNG, | |
| 951 NULL, NULL, | |
| 952 #ifdef DM_USE_LIBPNG | |
| 953 dmWritePNGImage, dmWritePNGImageFILE, | |
| 954 #else | |
| 955 NULL, NULL, | |
| 956 #endif | |
| 957 }, | |
| 958 { | |
| 959 "PPM", "Portable PixMap", | |
| 960 NULL, | |
| 961 NULL, NULL, | |
| 962 dmWritePPMImage, dmWritePPMImageFILE, | |
| 963 }, | |
| 964 { | |
| 965 "PCX", "Z-Soft Paintbrush", | |
| 966 fmtProbePCX, | |
| 967 dmReadPCXImage, dmReadPCXImageFILE, | |
| 968 dmWritePCXImage, dmWritePCXImageFILE, | |
| 969 }, | |
| 970 { | |
| 971 "ARAW", "IFFMaster Amiga RAW", | |
| 972 NULL, | |
| 973 NULL, NULL, | |
| 974 dmWriteIFFMasterRAWImage, dmWriteIFFMasterRAWImageFILE, | |
| 975 } | |
| 976 }; | |
| 977 | |
| 978 | |
| 979 int dmImageProbeGeneric(const Uint8 *buf, const size_t len, DMImageFormat **pfmt, int *index) | |
| 980 { | |
| 981 int i, scoreMax = DM_PROBE_SCORE_FALSE, scoreIndex = -1; | |
| 982 | |
| 983 for (i = 0; i < IMGFMT_LAST; i++) | |
| 984 { | |
| 985 DMImageFormat *fmt = &dmImageFormatList[i]; | |
| 986 int score = fmt->probe(buf, len); | |
| 987 if (score > scoreMax) | |
| 988 { | |
| 989 scoreMax = score; | |
| 990 scoreIndex = i; | |
| 991 } | |
| 992 } | |
| 993 | |
| 994 if (scoreIndex >= 0) | |
| 995 { | |
| 996 *pfmt = &dmImageFormatList[scoreIndex]; | |
| 997 *index = scoreIndex; | |
| 998 return scoreMax; | |
| 999 } | |
| 1000 else | |
| 1001 return DM_PROBE_SCORE_FALSE; | |
| 1002 } |