tools/bmp2rb.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2002 by Linus Nielsen Feltzing
  11  *
  12  * All files in this archive are subject to the GNU General Public License.
  13  * See the file COPYING in the source tree root for full license agreement.
  14  *
  15  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  16  * KIND, either express or implied.
  17  *
  18  ****************************************************************************/
  19 /****************************************************************************
  20  *
  21  * Converts BMP files to Rockbox bitmap format
  22  *
  23  * 1999-05-03 Linus Nielsen Feltzing
  24  *
  25  * 2005-07-06 Jens Arnold
  26  *            added reading of 4, 16, 24 and 32 bit bmps
  27  *            added 2 new target formats (playergfx and iriver 4-grey)
  28  *
  29  ****************************************************************************/
  30
  31 #include <stdio.h>
  32 #include <stdlib.h>
  33 #include <string.h>
  34 #include <stdbool.h>
  35
  36 #include <sys/types.h>
  37 #include <sys/stat.h>
  38 #include <fcntl.h>
  39
  40 #define debugf printf
  41
  42 #ifdef __GNUC__
  43 #define STRUCT_PACKED __attribute__((packed))
  44 #else
  45 #define STRUCT_PACKED
  46 #pragma pack (push, 2)
  47 #endif
  48
  49 struct Fileheader
  50 {
  51     unsigned short Type;          /* signature - 'BM' */
  52     unsigned int  Size;          /* file size in bytes */
  53     unsigned short Reserved1;     /* 0 */
  54     unsigned short Reserved2;     /* 0 */
  55     unsigned int  OffBits;       /* offset to bitmap */
  56     unsigned int  StructSize;    /* size of this struct (40) */
  57     unsigned int  Width;         /* bmap width in pixels */
  58     unsigned int  Height;        /* bmap height in pixels */
  59     unsigned short Planes;        /* num planes - always 1 */
  60     unsigned short BitCount;      /* bits per pixel */
  61     unsigned int  Compression;   /* compression flag */
  62     unsigned int  SizeImage;     /* image size in bytes */
  63     int           XPelsPerMeter; /* horz resolution */
  64     int           YPelsPerMeter; /* vert resolution */
  65     unsigned int  ClrUsed;       /* 0 -> color table size */
  66     unsigned int  ClrImportant;  /* important color count */
  67 } STRUCT_PACKED;
  68
  69 struct RGBQUAD
  70 {
  71     unsigned char rgbBlue;
  72     unsigned char rgbGreen;
  73     unsigned char rgbRed;
  74     unsigned char rgbReserved;
  75 } STRUCT_PACKED;
  76
  77 short readshort(void* value)
  78 {
  79     unsigned char* bytes = (unsigned char*) value;
  80     return bytes[0] | (bytes[1] << 8);
  81 }
  82
  83 int readint(void* value)
  84 {
  85     unsigned char* bytes = (unsigned char*) value;
  86     return bytes[0] | (bytes[1] << 8) | (bytes[2] << 16) | (bytes[3] << 24);
  87 }
  88
  89 unsigned char brightness(struct RGBQUAD color)
  90 {
  91     return (3 * (unsigned int)color.rgbRed + 6 * (unsigned int)color.rgbGreen
  92               + (unsigned int)color.rgbBlue) / 10;
  93 }
  94
  95 #ifndef O_BINARY
  96 #define O_BINARY 0 /* systems that don't have O_BINARY won't make a difference
  97                       on text and binary files */
  98 #endif
  99
 100 /****************************************************************************
 101  * read_bmp_file()
 102  *
 103  * Reads an uncompressed BMP file and puts the data in a 4-byte-per-pixel
 104  * (RGBQUAD) array. Returns 0 on success.
 105  *
 106  ***************************************************************************/
 107
 108 int read_bmp_file(char* filename,
 109                   int *get_width,  /* in pixels */
 110                   int *get_height, /* in pixels */
 111                   struct RGBQUAD **bitmap)
 112 {
 113     struct Fileheader fh;
 114     struct RGBQUAD palette[256];
 115
 116     int fd = open(filename, O_RDONLY| O_BINARY);
 117     unsigned short data;
 118     unsigned char *bmp;
 119     int width, height;
 120     int padded_width;
 121     int size;
 122     int row, col, i;
 123     int numcolors, compression;
 124     int depth;
 125
 126     if (fd == -1)
 127     {
 128         debugf("error - can't open '%s'\n", filename);
 129         return 1;
 130     }
 131     if (read(fd, &fh, sizeof(struct Fileheader)) !=
 132         sizeof(struct Fileheader))
 133     {
 134         debugf("error - can't Read Fileheader Stucture\n");
 135         close(fd);
 136         return 2;
 137     }
 138
 139     compression = readint(&fh.Compression);
 140
 141     if (compression != 0)
 142     {
 143         debugf("error - Unsupported compression %ld\n", compression);
 144         close(fd);
 145         return 3;
 146     }
 147
 148     depth = readshort(&fh.BitCount);
 149
 150     if (depth <= 8)
 151     {
 152         numcolors = readint(&fh.ClrUsed);
 153         if (numcolors == 0)
 154             numcolors = 1 << depth;
 155
 156         if (read(fd, &palette[0], numcolors * sizeof(struct RGBQUAD))
 157            != numcolors * sizeof(struct RGBQUAD))
 158         {
 159             debugf("error - Can't read bitmap's color palette\n");
 160             close(fd);
 161             return 4;
 162         }
 163     }
 164
 165     width = readint(&fh.Width);
 166     height = readint(&fh.Height);
 167     padded_width = ((width * depth + 31) / 8) & ~3; /* aligned 4-bytes boundaries */
 168
 169     size = padded_width * height; /* read this many bytes */
 170     bmp = (unsigned char *)malloc(size);
 171     *bitmap = (struct RGBQUAD *)malloc(width * height * sizeof(struct RGBQUAD));
 172
 173     if ((bmp == NULL) || (*bitmap == NULL))
 174     {
 175         debugf("error - Out of memory\n");
 176         close(fd);
 177         return 5;
 178     }
 179
 180     if (lseek(fd, (off_t)readint(&fh.OffBits), SEEK_SET) < 0)
 181     {
 182         debugf("error - Can't seek to start of image data\n");
 183         close(fd);
 184         return 6;
 185     }
 186     if (read(fd, (unsigned char*)bmp, (int)size) != size)
 187     {
 188         debugf("error - Can't read image\n");
 189         close(fd);
 190         return 7;
 191     }
 192
 193     close(fd);
 194     *get_width = width;
 195     *get_height = height;
 196
 197     switch (depth)
 198     {
 199       case 1:
 200         for (row = 0; row < height; row++)
 201             for (col = 0; col < width; col++)
 202             {
 203                 data = (bmp[(height - 1 - row) * padded_width + col / 8]
 204                         >> (~col & 7)) & 1;
 205                 (*bitmap)[row * width + col] = palette[data];
 206             }
 207         break;
 208
 209       case 4:
 210         for (row = 0; row < height; row++)
 211             for (col = 0; col < width; col++)
 212             {
 213                 data = (bmp[(height - 1 - row) * padded_width + col / 2]
 214                         >> (4 * (~col & 1))) & 0x0F;
 215                 (*bitmap)[row * width + col] = palette[data];
 216             }
 217         break;
 218
 219       case 8:
 220         for (row = 0; row < height; row++)
 221             for (col = 0; col < width; col++)
 222             {
 223                 data = bmp[(height - 1 - row) * padded_width + col];
 224                 (*bitmap)[row * width + col] = palette[data];
 225             }
 226         break;
 227
 228       case 16:
 229         for (row = 0; row < height; row++)
 230             for (col = 0; col < width; col++)
 231             {
 232                 data = readshort(&bmp[(height - 1 - row) * padded_width + 2 * col]);
 233                 (*bitmap)[row * width + col].rgbRed =
 234                     ((data >> 7) & 0xF8) | ((data >> 12) & 0x07);
 235                 (*bitmap)[row * width + col].rgbGreen =
 236                     ((data >> 2) & 0xF8) | ((data >> 7) & 0x07);
 237                 (*bitmap)[row * width + col].rgbBlue =
 238                     ((data << 3) & 0xF8) | ((data >> 2) & 0x07);
 239                 (*bitmap)[row * width + col].rgbReserved = 0;
 240             }
 241         break;
 242
 243       case 24:
 244         for (row = 0; row < height; row++)
 245             for (col = 0; col < width; col++)
 246             {
 247                 i = (height - 1 - row) * padded_width + 3 * col;
 248                 (*bitmap)[row * width + col].rgbRed = bmp[i+2];
 249                 (*bitmap)[row * width + col].rgbGreen = bmp[i+1];
 250                 (*bitmap)[row * width + col].rgbBlue = bmp[i];
 251                 (*bitmap)[row * width + col].rgbReserved = 0;
 252             }
 253         break;
 254
 255       case 32:
 256         for (row = 0; row < height; row++)
 257             for (col = 0; col < width; col++)
 258             {
 259                 i = (height - 1 - row) * padded_width + 4 * col;
 260                 (*bitmap)[row * width + col].rgbRed = bmp[i+2];
 261                 (*bitmap)[row * width + col].rgbGreen = bmp[i+1];
 262                 (*bitmap)[row * width + col].rgbBlue = bmp[i];
 263                 (*bitmap)[row * width + col].rgbReserved = 0;
 264             }
 265         break;
 266
 267       default: /* should never happen */
 268         debugf("error - Unsupported bitmap depth %d.\n", depth);
 269         return 8;
 270     }
 271
 272     free(bmp);
 273
 274     return 0; /* success */
 275 }
 276
 277 /****************************************************************************
 278  * transform_bitmap()
 279  *
 280  * Transform a 4-byte-per-pixel bitmap (RGBQUAD) into one of the supported
 281  * destination formats
 282  ****************************************************************************/
 283
 284 int transform_bitmap(const struct RGBQUAD *src, int width, int height,
 285                      int format, unsigned short **dest, int *dst_width,
 286                      int *dst_height, int *dst_depth)
 287 {
 288     int row, col;
 289     int dst_w, dst_h, dst_d;
 290
 291     switch (format)
 292     {
 293       case 0: /* Archos recorders, Ondio, Gmini 120/SP, Iriver H1x0 monochrome */
 294         dst_w = width;
 295         dst_h = (height + 7) / 8;
 296         dst_d = 8;
 297         break;
 298
 299       case 1: /* Archos player graphics library */
 300         dst_w = (width + 7) / 8;
 301         dst_h = height;
 302         dst_d = 8;
 303         break;
 304
 305       case 2: /* Iriver H1x0 4-grey */
 306         dst_w = width;
 307         dst_h = (height + 3) / 4;
 308         dst_d = 8;
 309         break;
 310
 311       case 3: /* Canonical 8-bit grayscale */
 312         dst_w = width;
 313         dst_h = height;
 314         dst_d = 8;
 315         break;
 316
 317       case 4: /* 16-bit packed RGB (5-6-5) */
 318       case 5: /* 16-bit packed and byte-swapped RGB (5-6-5) */
 319         dst_w = width;
 320         dst_h = height;
 321         dst_d = 16;
 322         break;
 323
 324       case 6: /* greyscale iPods 4-grey */
 325         dst_w = (width + 3) / 4;
 326         dst_h = height;
 327         dst_d = 8;
 328         break;
 329
 330       default: /* unknown */
 331         debugf("error - Undefined destination format\n");
 332         return 1;
 333     }
 334
 335     *dest = (unsigned short *)malloc(dst_w * dst_h * sizeof(short));
 336     if (*dest == NULL)
 337     {
 338         debugf("error - Out of memory.\n");
 339         return 2;
 340     }
 341     memset(*dest, 0, dst_w * dst_h * sizeof(short));
 342     *dst_width = dst_w;
 343     *dst_height = dst_h;
 344     *dst_depth = dst_d;
 345
 346     switch (format)
 347     {
 348       case 0: /* Archos recorders, Ondio, Gmini 120/SP, Iriver H1x0 b&w */
 349         for (row = 0; row < height; row++)
 350             for (col = 0; col < width; col++)
 351             {
 352                 (*dest)[(row/8) * dst_w + col] |=
 353                        (~brightness(src[row * width + col]) & 0x80) >> (~row & 7);
 354             }
 355         break;
 356
 357       case 1: /* Archos player graphics library */
 358         for (row = 0; row < height; row++)
 359             for (col = 0; col < width; col++)
 360             {
 361                 (*dest)[row * dst_w + (col/8)] |=
 362                        (~brightness(src[row * width + col]) & 0x80) >> (col & 7);
 363             }
 364         break;
 365
 366       case 2: /* Iriver H1x0 4-grey */
 367         for (row = 0; row < height; row++)
 368             for (col = 0; col < width; col++)
 369             {
 370                 (*dest)[(row/4) * dst_w + col] |=
 371                        (~brightness(src[row * width + col]) & 0xC0) >> (2 * (~row & 3));
 372             }
 373         break;
 374
 375       case 3: /* Canonical 8-bit grayscale */
 376         for (row = 0; row < height; row++)
 377             for (col = 0; col < width; col++)
 378             {
 379                 (*dest)[row * dst_w + col] = brightness(src[row * width + col]);
 380             }
 381         break;
 382
 383       case 4: /* 16-bit packed RGB (5-6-5) */
 384       case 5: /* 16-bit packed and byte-swapped RGB (5-6-5) */
 385         for (row = 0; row < height; row++)
 386             for (col = 0; col < width; col++)
 387             {
 388                 unsigned short rgb =
 389                     (((src[row * width + col].rgbRed >> 3) << 11) |
 390                      ((src[row * width + col].rgbGreen >> 2) << 5) |
 391                      ((src[row * width + col].rgbBlue >> 3)));
 392
 393                 if (format == 4)
 394                     (*dest)[row * dst_w + col] = rgb;
 395                 else
 396                     (*dest)[row * dst_w + col] = ((rgb&0xff00)>>8)|((rgb&0x00ff)<<8);
 397             }
 398         break;
 399
 400       case 6: /* greyscale iPods 4-grey */
 401         for (row = 0; row < height; row++)
 402             for (col = 0; col < width; col++)
 403             {
 404                 (*dest)[row * dst_w + (col/4)] |=
 405                        (~brightness(src[row * width + col]) & 0xC0) >> (2 * (~col & 3));
 406             }
 407         break;
 408     }
 409
 410     return 0;
 411 }
 412
 413 /****************************************************************************
 414  * generate_c_source()
 415  *
 416  * Outputs a C source code with the bitmap in an array, accompanied by
 417  * some #define's
 418  ****************************************************************************/
 419
 420 void generate_c_source(char *id, char* header_dir, int width, int height,
 421                        const unsigned short *t_bitmap, int t_width,
 422                        int t_height, int t_depth)
 423 {
 424     FILE *f;
 425     FILE *fh;
 426     int i, a;
 427     char header_name[1024];
 428
 429     if (!id || !id[0])
 430         id = "bitmap";
 431
 432     f = stdout;
 433
 434     if (header_dir && header_dir[0])
 435     {
 436         snprintf(header_name,sizeof(header_name),"%s/%s.h",header_dir,id);
 437         fh = fopen(header_name,"w+");
 438
 439         if (fh == NULL)
 440         {
 441             debugf("error - can't open '%s'\n", header_name);
 442             return;
 443         }
 444         fprintf(fh,
 445                 "#define BMPHEIGHT_%s %ld\n"
 446                 "#define BMPWIDTH_%s %ld\n",
 447                 id, height, id, width);
 448         if (t_depth <= 8)
 449             fprintf(fh, "extern const unsigned char %s[];\n", id);
 450         else
 451             fprintf(fh, "extern const unsigned short %s[];\n", id);
 452
 453         fclose(fh);
 454     } else {
 455         fprintf(f,
 456                 "#define BMPHEIGHT_%s %ld\n"
 457                 "#define BMPWIDTH_%s %ld\n",
 458                 id, height, id, width);
 459     }
 460
 461     if (t_depth <= 8)
 462         fprintf(f, "const unsigned char %s[] = {\n", id);
 463     else
 464         fprintf(f, "const unsigned short %s[] = {\n", id);
 465
 466     for (i = 0; i < t_height; i++)
 467     {
 468         for (a = 0; a < t_width; a++)
 469         {
 470             if (t_depth <= 8)
 471                 fprintf(f, "0x%02x,%c", t_bitmap[i * t_width + a],
 472                         (a + 1) % 13 ? ' ' : '\n');
 473             else
 474                 fprintf(f, "0x%04x,%c", t_bitmap[i * t_width + a],
 475                         (a + 1) % 10 ? ' ' : '\n');
 476         }
 477         fprintf(f, "\n");
 478     }
 479
 480     fprintf(f, "\n};\n");
 481 }
 482
 483 /****************************************************************************
 484  * generate_ascii()
 485  *
 486  * Outputs an ascii picture of the bitmap
 487  ****************************************************************************/
 488
 489 void generate_ascii(int width, int height, struct RGBQUAD *bitmap)
 490 {
 491     FILE *f;
 492     int x, y;
 493
 494     f = stdout;
 495
 496     /* for screen output debugging */
 497     for (y = 0; y < height; y++)
 498     {
 499         for (x = 0; x < width; x++)
 500         {
 501             fprintf(f, (brightness(bitmap[y * width + x]) & 0x80) ? " " : "*");
 502         }
 503         fprintf(f, "\n");
 504     }
 505 }
 506
 507 void print_usage(void)
 508 {
 509     printf("Usage: %s [-i <id>] [-a] <bitmap file>\n"
 510            "\t-i <id>  Bitmap name (default is filename without extension)\n"
 511            "\t-h <dir> Create header file in <dir>/<id>.h\n"
 512            "\t-a       Show ascii picture of bitmap\n"
 513            "\t-f <n>   Generate destination format n, default = 0\n"
 514            "\t         0  Archos recorder, Ondio, Gmini 120/SP, Iriver H1x0 mono\n"
 515            "\t         1  Archos player graphics library\n"
 516            "\t         2  Iriver H1x0 4-grey\n"
 517            "\t         3  Canonical 8-bit grayscale\n"
 518            "\t         4  16-bit packed 5-6-5 RGB (iriver H300)\n"
 519            "\t         5  16-bit packed and byte-swapped 5-6-5 RGB (iPod)\n"
 520            "\t         6  Greayscale iPod 4-grey\n"
 521            , APPLICATION_NAME);
 522     printf("build date: " __DATE__ "\n\n");
 523 }
 524
 525 int main(int argc, char **argv)
 526 {
 527     char *bmp_filename = NULL;
 528     char *id = NULL;
 529     char* header_dir = NULL;
 530     int i;
 531     int ascii = false;
 532     int format = 0;
 533     struct RGBQUAD *bitmap = NULL;
 534     unsigned short *t_bitmap = NULL;
 535     int width, height;
 536     int t_width, t_height, t_depth;
 537
 538
 539     for (i = 1;i < argc;i++)
 540     {
 541         if (argv[i][0] == '-')
 542         {
 543             switch (argv[i][1])
 544             {
 545               case 'h':   /* .h filename */
 546                 if (argv[i][2])
 547                 {
 548                     header_dir = &argv[i][2];
 549                 }
 550                 else if (argc > i+1)
 551                 {
 552                     header_dir = argv[i+1];
 553                     i++;
 554                 }
 555                 else
 556                 {
 557                     print_usage();
 558                     exit(1);
 559                 }
 560                 break;
 561
 562               case 'i':   /* ID */
 563                 if (argv[i][2])
 564                 {
 565                     id = &argv[i][2];
 566                 }
 567                 else if (argc > i+1)
 568                 {
 569                     id = argv[i+1];
 570                     i++;
 571                 }
 572                 else
 573                 {
 574                     print_usage();
 575                     exit(1);
 576                 }
 577                 break;
 578
 579               case 'a':   /* Ascii art */
 580                 ascii = true;
 581                 break;
 582
 583               case 'f':
 584                 if (argv[i][2])
 585                 {
 586                     format = atoi(&argv[i][2]);
 587                 }
 588                 else if (argc > i+1)
 589                 {
 590                     format = atoi(argv[i+1]);
 591                     i++;
 592                 }
 593                 else
 594                 {
 595                     print_usage();
 596                     exit(1);
 597                 }
 598                 break;
 599
 600               default:
 601                 print_usage();
 602                 exit(1);
 603                 break;
 604             }
 605         }
 606         else
 607         {
 608             if (!bmp_filename)
 609             {
 610                 bmp_filename = argv[i];
 611             }
 612             else
 613             {
 614                 print_usage();
 615                 exit(1);
 616             }
 617         }
 618     }
 619
 620     if (!bmp_filename)
 621     {
 622         print_usage();
 623         exit(1);
 624     }
 625
 626     if (!id)
 627     {
 628         char *ptr=strrchr(bmp_filename, '/');
 629         if (ptr)
 630             ptr++;
 631         else
 632             ptr = bmp_filename;
 633         id = strdup(ptr);
 634         for (i = 0; id[i]; i++)
 635             if (id[i] == '.')
 636                 id[i] = '\0';
 637     }
 638
 639     if (read_bmp_file(bmp_filename, &width, &height, &bitmap))
 640         exit(1);
 641
 642
 643     if (ascii)
 644     {
 645         generate_ascii(width, height, bitmap);
 646     }
 647     else
 648     {
 649         if (transform_bitmap(bitmap, width, height, format, &t_bitmap,
 650                              &t_width, &t_height, &t_depth))
 651             exit(1);
 652         generate_c_source(id, header_dir, width, height, t_bitmap,
 653                           t_width, t_height, t_depth);
 654     }
 655
 656     return 0;
 657 }