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  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21 /****************************************************************************
  22  *
  23  * Converts BMP files to Rockbox bitmap format
  24  *
  25  * 1999-05-03 Linus Nielsen Feltzing
  26  *
  27  * 2005-07-06 Jens Arnold
  28  *            added reading of 4, 16, 24 and 32 bit bmps
  29  *            added 2 new target formats (playergfx and iriver 4-grey)
  30  *
  31  ****************************************************************************/
  32
  33 #include <stdio.h>
  34 #include <stdlib.h>
  35 #include <string.h>
  36 #include <stdbool.h>
  37 #include <unistd.h>
  38
  39 #include <sys/types.h>
  40 #include <sys/stat.h>
  41 #include <fcntl.h>
  42
  43 #define debugf printf
  44
  45 #ifdef __GNUC__
  46 #define STRUCT_PACKED __attribute__((packed))
  47 #else
  48 #define STRUCT_PACKED
  49 #pragma pack (push, 2)
  50 #endif
  51
  52 struct Fileheader
  53 {
  54     unsigned short Type;          /* signature - 'BM' */
  55     unsigned int  Size;          /* file size in bytes */
  56     unsigned short Reserved1;     /* 0 */
  57     unsigned short Reserved2;     /* 0 */
  58     unsigned int  OffBits;       /* offset to bitmap */
  59     unsigned int  StructSize;    /* size of this struct (40) */
  60     unsigned int  Width;         /* bmap width in pixels */
  61     unsigned int  Height;        /* bmap height in pixels */
  62     unsigned short Planes;        /* num planes - always 1 */
  63     unsigned short BitCount;      /* bits per pixel */
  64     unsigned int  Compression;   /* compression flag */
  65     unsigned int  SizeImage;     /* image size in bytes */
  66     int           XPelsPerMeter; /* horz resolution */
  67     int           YPelsPerMeter; /* vert resolution */
  68     unsigned int  ClrUsed;       /* 0 -> color table size */
  69     unsigned int  ClrImportant;  /* important color count */
  70 } STRUCT_PACKED;
  71
  72 struct RGBQUAD
  73 {
  74     unsigned char rgbBlue;
  75     unsigned char rgbGreen;
  76     unsigned char rgbRed;
  77     unsigned char rgbReserved;
  78 } STRUCT_PACKED;
  79
  80 short readshort(void* value)
  81 {
  82     unsigned char* bytes = (unsigned char*) value;
  83     return bytes[0] | (bytes[1] << 8);
  84 }
  85
  86 int readint(void* value)
  87 {
  88     unsigned char* bytes = (unsigned char*) value;
  89     return bytes[0] | (bytes[1] << 8) | (bytes[2] << 16) | (bytes[3] << 24);
  90 }
  91
  92 unsigned char brightness(struct RGBQUAD color)
  93 {
  94     return (3 * (unsigned int)color.rgbRed + 6 * (unsigned int)color.rgbGreen
  95               + (unsigned int)color.rgbBlue) / 10;
  96 }
  97
  98 #ifndef O_BINARY
  99 #define O_BINARY 0 /* systems that don't have O_BINARY won't make a difference
 100                       on text and binary files */
 101 #endif
 102
 103 /****************************************************************************
 104  * read_bmp_file()
 105  *
 106  * Reads an uncompressed BMP file and puts the data in a 4-byte-per-pixel
 107  * (RGBQUAD) array. Returns 0 on success.
 108  *
 109  ***************************************************************************/
 110
 111 int read_bmp_file(char* filename,
 112                   int *get_width,  /* in pixels */
 113                   int *get_height, /* in pixels */
 114                   struct RGBQUAD **bitmap)
 115 {
 116     struct Fileheader fh;
 117     struct RGBQUAD palette[256];
 118
 119     int fd = open(filename, O_RDONLY| O_BINARY);
 120     unsigned short data;
 121     unsigned char *bmp;
 122     int width, height;
 123     int padded_width;
 124     int size;
 125     int row, col, i;
 126     int numcolors, compression;
 127     int depth;
 128
 129     if (fd == -1)
 130     {
 131         debugf("error - can't open '%s'\n", filename);
 132         return 1;
 133     }
 134     if (read(fd, &fh, sizeof(struct Fileheader)) !=
 135         sizeof(struct Fileheader))
 136     {
 137         debugf("error - can't Read Fileheader Stucture\n");
 138         close(fd);
 139         return 2;
 140     }
 141
 142     compression = readint(&fh.Compression);
 143
 144     if (compression != 0)
 145     {
 146         debugf("error - Unsupported compression %d\n", compression);
 147         close(fd);
 148         return 3;
 149     }
 150
 151     depth = readshort(&fh.BitCount);
 152
 153     if (depth <= 8)
 154     {
 155         numcolors = readint(&fh.ClrUsed);
 156         if (numcolors == 0)
 157             numcolors = 1 << depth;
 158
 159         if (read(fd, &palette[0], numcolors * sizeof(struct RGBQUAD))
 160             != (int)(numcolors * sizeof(struct RGBQUAD)))
 161         {
 162             debugf("error - Can't read bitmap's color palette\n");
 163             close(fd);
 164             return 4;
 165         }
 166     }
 167
 168     width = readint(&fh.Width);
 169     height = readint(&fh.Height);
 170     padded_width = ((width * depth + 31) / 8) & ~3; /* aligned 4-bytes boundaries */
 171
 172     size = padded_width * height; /* read this many bytes */
 173     bmp = (unsigned char *)malloc(size);
 174     *bitmap = (struct RGBQUAD *)malloc(width * height * sizeof(struct RGBQUAD));
 175
 176     if ((bmp == NULL) || (*bitmap == NULL))
 177     {
 178         debugf("error - Out of memory\n");
 179         close(fd);
 180         return 5;
 181     }
 182
 183     if (lseek(fd, (off_t)readint(&fh.OffBits), SEEK_SET) < 0)
 184     {
 185         debugf("error - Can't seek to start of image data\n");
 186         close(fd);
 187         return 6;
 188     }
 189     if (read(fd, (unsigned char*)bmp, (int)size) != size)
 190     {
 191         debugf("error - Can't read image\n");
 192         close(fd);
 193         return 7;
 194     }
 195
 196     close(fd);
 197     *get_width = width;
 198     *get_height = height;
 199
 200     switch (depth)
 201     {
 202       case 1:
 203         for (row = 0; row < height; row++)
 204             for (col = 0; col < width; col++)
 205             {
 206                 data = (bmp[(height - 1 - row) * padded_width + col / 8]
 207                         >> (~col & 7)) & 1;
 208                 (*bitmap)[row * width + col] = palette[data];
 209             }
 210         break;
 211
 212       case 4:
 213         for (row = 0; row < height; row++)
 214             for (col = 0; col < width; col++)
 215             {
 216                 data = (bmp[(height - 1 - row) * padded_width + col / 2]
 217                         >> (4 * (~col & 1))) & 0x0F;
 218                 (*bitmap)[row * width + col] = palette[data];
 219             }
 220         break;
 221
 222       case 8:
 223         for (row = 0; row < height; row++)
 224             for (col = 0; col < width; col++)
 225             {
 226                 data = bmp[(height - 1 - row) * padded_width + col];
 227                 (*bitmap)[row * width + col] = palette[data];
 228             }
 229         break;
 230
 231       case 16:
 232         for (row = 0; row < height; row++)
 233             for (col = 0; col < width; col++)
 234             {
 235                 data = readshort(&bmp[(height - 1 - row) * padded_width + 2 * col]);
 236                 (*bitmap)[row * width + col].rgbRed =
 237                     ((data >> 7) & 0xF8) | ((data >> 12) & 0x07);
 238                 (*bitmap)[row * width + col].rgbGreen =
 239                     ((data >> 2) & 0xF8) | ((data >> 7) & 0x07);
 240                 (*bitmap)[row * width + col].rgbBlue =
 241                     ((data << 3) & 0xF8) | ((data >> 2) & 0x07);
 242                 (*bitmap)[row * width + col].rgbReserved = 0;
 243             }
 244         break;
 245
 246       case 24:
 247         for (row = 0; row < height; row++)
 248             for (col = 0; col < width; col++)
 249             {
 250                 i = (height - 1 - row) * padded_width + 3 * col;
 251                 (*bitmap)[row * width + col].rgbRed = bmp[i+2];
 252                 (*bitmap)[row * width + col].rgbGreen = bmp[i+1];
 253                 (*bitmap)[row * width + col].rgbBlue = bmp[i];
 254                 (*bitmap)[row * width + col].rgbReserved = 0;
 255             }
 256         break;
 257
 258       case 32:
 259         for (row = 0; row < height; row++)
 260             for (col = 0; col < width; col++)
 261             {
 262                 i = (height - 1 - row) * padded_width + 4 * col;
 263                 (*bitmap)[row * width + col].rgbRed = bmp[i+2];
 264                 (*bitmap)[row * width + col].rgbGreen = bmp[i+1];
 265                 (*bitmap)[row * width + col].rgbBlue = bmp[i];
 266                 (*bitmap)[row * width + col].rgbReserved = 0;
 267             }
 268         break;
 269
 270       default: /* should never happen */
 271         debugf("error - Unsupported bitmap depth %d.\n", depth);
 272         return 8;
 273     }
 274
 275     free(bmp);
 276
 277     return 0; /* success */
 278 }
 279
 280 /****************************************************************************
 281  * transform_bitmap()
 282  *
 283  * Transform a 4-byte-per-pixel bitmap (RGBQUAD) into one of the supported
 284  * destination formats
 285  ****************************************************************************/
 286
 287 int transform_bitmap(const struct RGBQUAD *src, int width, int height,
 288                      int format, unsigned short **dest, int *dst_width,
 289                      int *dst_height, int *dst_depth)
 290 {
 291     int row, col;
 292     int dst_w, dst_h, dst_d;
 293
 294     switch (format)
 295     {
 296       case 0: /* Archos recorders, Ondio, Iriver H1x0 monochrome */
 297         dst_w = width;
 298         dst_h = (height + 7) / 8;
 299         dst_d = 8;
 300         break;
 301
 302       case 1: /* Archos player graphics library */
 303         dst_w = (width + 7) / 8;
 304         dst_h = height;
 305         dst_d = 8;
 306         break;
 307
 308       case 2: /* Iriver H1x0 4-grey */
 309         dst_w = width;
 310         dst_h = (height + 3) / 4;
 311         dst_d = 8;
 312         break;
 313
 314       case 3: /* Canonical 8-bit grayscale */
 315         dst_w = width;
 316         dst_h = height;
 317         dst_d = 8;
 318         break;
 319
 320       case 4: /* 16-bit packed RGB (5-6-5) */
 321       case 5: /* 16-bit packed and byte-swapped RGB (5-6-5) */
 322         dst_w = width;
 323         dst_h = height;
 324         dst_d = 16;
 325         break;
 326
 327       case 6: /* greyscale iPods 4-grey */
 328         dst_w = (width + 3) / 4;
 329         dst_h = height;
 330         dst_d = 8;
 331         break;
 332
 333       case 7: /* greyscale X5 remote 4-grey */
 334         dst_w = width;
 335         dst_h = (height + 7) / 8;
 336         dst_d = 16;
 337         break;
 338
 339       default: /* unknown */
 340         debugf("error - Undefined destination format\n");
 341         return 1;
 342     }
 343
 344     *dest = (unsigned short *)malloc(dst_w * dst_h * sizeof(short));
 345     if (*dest == NULL)
 346     {
 347         debugf("error - Out of memory.\n");
 348         return 2;
 349     }
 350     memset(*dest, 0, dst_w * dst_h * sizeof(short));
 351     *dst_width = dst_w;
 352     *dst_height = dst_h;
 353     *dst_depth = dst_d;
 354
 355     switch (format)
 356     {
 357       case 0: /* Archos recorders, Ondio, Iriver H1x0 b&w */
 358         for (row = 0; row < height; row++)
 359             for (col = 0; col < width; col++)
 360             {
 361                 (*dest)[(row/8) * dst_w + col] |=
 362                        (~brightness(src[row * width + col]) & 0x80) >> (~row & 7);
 363             }
 364         break;
 365
 366       case 1: /* Archos player graphics library */
 367         for (row = 0; row < height; row++)
 368             for (col = 0; col < width; col++)
 369             {
 370                 (*dest)[row * dst_w + (col/8)] |=
 371                        (~brightness(src[row * width + col]) & 0x80) >> (col & 7);
 372             }
 373         break;
 374
 375       case 2: /* Iriver H1x0 4-grey */
 376         for (row = 0; row < height; row++)
 377             for (col = 0; col < width; col++)
 378             {
 379                 (*dest)[(row/4) * dst_w + col] |=
 380                        (~brightness(src[row * width + col]) & 0xC0) >> (2 * (~row & 3));
 381             }
 382         break;
 383
 384       case 3: /* Canonical 8-bit grayscale */
 385         for (row = 0; row < height; row++)
 386             for (col = 0; col < width; col++)
 387             {
 388                 (*dest)[row * dst_w + col] = brightness(src[row * width + col]);
 389             }
 390         break;
 391
 392       case 4: /* 16-bit packed RGB (5-6-5) */
 393       case 5: /* 16-bit packed and byte-swapped RGB (5-6-5) */
 394         for (row = 0; row < height; row++)
 395             for (col = 0; col < width; col++)
 396             {
 397                 unsigned short rgb =
 398                     (((src[row * width + col].rgbRed >> 3) << 11) |
 399                      ((src[row * width + col].rgbGreen >> 2) << 5) |
 400                      ((src[row * width + col].rgbBlue >> 3)));
 401
 402                 if (format == 4)
 403                     (*dest)[row * dst_w + col] = rgb;
 404                 else
 405                     (*dest)[row * dst_w + col] = ((rgb&0xff00)>>8)|((rgb&0x00ff)<<8);
 406             }
 407         break;
 408
 409       case 6: /* greyscale iPods 4-grey */
 410         for (row = 0; row < height; row++)
 411             for (col = 0; col < width; col++)
 412             {
 413                 (*dest)[row * dst_w + (col/4)] |=
 414                        (~brightness(src[row * width + col]) & 0xC0) >> (2 * (col & 3));
 415             }
 416         break;
 417
 418       case 7: /* greyscale X5 remote 4-grey */
 419         for (row = 0; row < height; row++)
 420             for (col = 0; col < width; col++)
 421             {
 422                 unsigned short data = (~brightness(src[row * width + col]) & 0xC0) >> 6;
 423
 424                 data = (data | (data << 7)) & 0x0101;
 425                 (*dest)[(row/8) * dst_w + col] |= data << (row & 7);
 426             }
 427         break;
 428     }
 429
 430     return 0;
 431 }
 432
 433 /****************************************************************************
 434  * generate_c_source()
 435  *
 436  * Outputs a C source code with the bitmap in an array, accompanied by
 437  * some #define's
 438  ****************************************************************************/
 439
 440 void generate_c_source(char *id, char* header_dir, int width, int height,
 441                        const unsigned short *t_bitmap, int t_width,
 442                        int t_height, int t_depth)
 443 {
 444     FILE *f;
 445     FILE *fh;
 446     int i, a;
 447     char header_name[1024];
 448
 449     if (!id || !id[0])
 450         id = "bitmap";
 451
 452     f = stdout;
 453
 454     if (header_dir && header_dir[0])
 455     {
 456         snprintf(header_name,sizeof(header_name),"%s/%s.h",header_dir,id);
 457         fh = fopen(header_name,"w+");
 458
 459         if (fh == NULL)
 460         {
 461             debugf("error - can't open '%s'\n", header_name);
 462             return;
 463         }
 464         fprintf(fh,
 465                 "#define BMPHEIGHT_%s %d\n"
 466                 "#define BMPWIDTH_%s %d\n",
 467                 id, height, id, width);
 468         if (t_depth <= 8)
 469             fprintf(fh, "extern const unsigned char %s[];\n", id);
 470         else
 471             fprintf(fh, "extern const unsigned short %s[];\n", id);
 472
 473         fclose(fh);
 474     } else {
 475         fprintf(f,
 476                 "#define BMPHEIGHT_%s %d\n"
 477                 "#define BMPWIDTH_%s %d\n",
 478                 id, height, id, width);
 479     }
 480
 481     if (t_depth <= 8)
 482         fprintf(f, "const unsigned char %s[] = {\n", id);
 483     else
 484         fprintf(f, "const unsigned short %s[] = {\n", id);
 485
 486     for (i = 0; i < t_height; i++)
 487     {
 488         for (a = 0; a < t_width; a++)
 489         {
 490             if (t_depth <= 8)
 491                 fprintf(f, "0x%02x,%c", t_bitmap[i * t_width + a],
 492                         (a + 1) % 13 ? ' ' : '\n');
 493             else
 494                 fprintf(f, "0x%04x,%c", t_bitmap[i * t_width + a],
 495                         (a + 1) % 10 ? ' ' : '\n');
 496         }
 497         fprintf(f, "\n");
 498     }
 499
 500     fprintf(f, "\n};\n");
 501 }
 502
 503 void generate_raw_file(const unsigned short *t_bitmap,
 504                        int t_width, int t_height, int t_depth)
 505 {
 506     FILE *f;
 507     int i, a;
 508     unsigned char lo,hi;
 509
 510     f = stdout;
 511
 512     for (i = 0; i < t_height; i++)
 513     {
 514         for (a = 0; a < t_width; a++)
 515         {
 516             if (t_depth <= 8)
 517             {
 518                 lo = (t_bitmap[i * t_width + a] & 0x00ff);
 519                 fwrite(&lo, 1, 1, f);
 520             }
 521             else
 522             {
 523                 lo = (t_bitmap[i * t_width + a] & 0x00ff);
 524                 hi = (t_bitmap[i * t_width + a] & 0xff00) >> 8;
 525                 fwrite(&lo, 1, 1, f);
 526                 fwrite(&hi, 1, 1, f);
 527             }
 528         }
 529     }
 530 }
 531
 532 /****************************************************************************
 533  * generate_ascii()
 534  *
 535  * Outputs an ascii picture of the bitmap
 536  ****************************************************************************/
 537
 538 void generate_ascii(int width, int height, struct RGBQUAD *bitmap)
 539 {
 540     FILE *f;
 541     int x, y;
 542
 543     f = stdout;
 544
 545     /* for screen output debugging */
 546     for (y = 0; y < height; y++)
 547     {
 548         for (x = 0; x < width; x++)
 549         {
 550             fprintf(f, (brightness(bitmap[y * width + x]) & 0x80) ? " " : "*");
 551         }
 552         fprintf(f, "\n");
 553     }
 554 }
 555
 556 void print_usage(void)
 557 {
 558     printf("Usage: %s [-i <id>] [-a] <bitmap file>\n"
 559            "\t-i <id>  Bitmap name (default is filename without extension)\n"
 560            "\t-h <dir> Create header file in <dir>/<id>.h\n"
 561            "\t-a       Show ascii picture of bitmap\n"
 562            "\t-r       Generate RAW file (little-endian)\n"
 563            "\t-f <n>   Generate destination format n, default = 0\n"
 564            "\t         0  Archos recorder, Ondio, Iriver H1x0 mono\n"
 565            , APPLICATION_NAME);
 566     printf("\t         1  Archos player graphics library\n"
 567            "\t         2  Iriver H1x0 4-grey\n"
 568            "\t         3  Canonical 8-bit greyscale\n"
 569            "\t         4  16-bit packed 5-6-5 RGB (iriver H300)\n"
 570            "\t         5  16-bit packed and byte-swapped 5-6-5 RGB (iPod)\n"
 571            "\t         6  Greyscale iPod 4-grey\n"
 572            "\t         7  Greyscale X5 remote 4-grey\n");
 573     printf("build date: " __DATE__ "\n\n");
 574 }
 575
 576 int main(int argc, char **argv)
 577 {
 578     char *bmp_filename = NULL;
 579     char *id = NULL;
 580     char* header_dir = NULL;
 581     int i;
 582     int ascii = false;
 583     int format = 0;
 584     struct RGBQUAD *bitmap = NULL;
 585     unsigned short *t_bitmap = NULL;
 586     int width, height;
 587     int t_width, t_height, t_depth;
 588     bool raw = false;
 589
 590
 591     for (i = 1;i < argc;i++)
 592     {
 593         if (argv[i][0] == '-')
 594         {
 595             switch (argv[i][1])
 596             {
 597               case 'h':   /* .h filename */
 598                 if (argv[i][2])
 599                 {
 600                     header_dir = &argv[i][2];
 601                 }
 602                 else if (argc > i+1)
 603                 {
 604                     header_dir = argv[i+1];
 605                     i++;
 606                 }
 607                 else
 608                 {
 609                     print_usage();
 610                     exit(1);
 611                 }
 612                 break;
 613
 614               case 'i':   /* ID */
 615                 if (argv[i][2])
 616                 {
 617                     id = &argv[i][2];
 618                 }
 619                 else if (argc > i+1)
 620                 {
 621                     id = argv[i+1];
 622                     i++;
 623                 }
 624                 else
 625                 {
 626                     print_usage();
 627                     exit(1);
 628                 }
 629                 break;
 630
 631               case 'a':   /* Ascii art */
 632                 ascii = true;
 633                 break;
 634
 635               case 'r':   /* Raw File */
 636                 raw = true;
 637                 break;
 638
 639               case 'f':
 640                 if (argv[i][2])
 641                 {
 642                     format = atoi(&argv[i][2]);
 643                 }
 644                 else if (argc > i+1)
 645                 {
 646                     format = atoi(argv[i+1]);
 647                     i++;
 648                 }
 649                 else
 650                 {
 651                     print_usage();
 652                     exit(1);
 653                 }
 654                 break;
 655
 656               default:
 657                 print_usage();
 658                 exit(1);
 659                 break;
 660             }
 661         }
 662         else
 663         {
 664             if (!bmp_filename)
 665             {
 666                 bmp_filename = argv[i];
 667             }
 668             else
 669             {
 670                 print_usage();
 671                 exit(1);
 672             }
 673         }
 674     }
 675
 676     if (!bmp_filename)
 677     {
 678         print_usage();
 679         exit(1);
 680     }
 681
 682     if (!id)
 683     {
 684         char *ptr=strrchr(bmp_filename, '/');
 685         if (ptr)
 686             ptr++;
 687         else
 688             ptr = bmp_filename;
 689         id = strdup(ptr);
 690         for (i = 0; id[i]; i++)
 691             if (id[i] == '.')
 692                 id[i] = '\0';
 693     }
 694
 695     if (read_bmp_file(bmp_filename, &width, &height, &bitmap))
 696         exit(1);
 697
 698
 699     if (ascii)
 700     {
 701         generate_ascii(width, height, bitmap);
 702     }
 703     else
 704     {
 705         if (transform_bitmap(bitmap, width, height, format, &t_bitmap,
 706                              &t_width, &t_height, &t_depth))
 707             exit(1);
 708         if(raw)
 709             generate_raw_file(t_bitmap, t_width, t_height, t_depth);
 710         else
 711             generate_c_source(id, header_dir, width, height, t_bitmap,
 712                               t_width, t_height, t_depth);
 713     }
 714
 715     return 0;
 716 }