libnjb: setpbm.c

# setpbm.c

    #include "common.h"
    /* For isspace() */
    #include <ctype.h>

    static void usage (void)
    {
      fprintf(stderr, "usage: setpbm [ -D debuglvl ] <path>\n");
      exit(1);
    }

    static void skip_whitespaces (FILE *f) {
      int c;

      while (!feof (f)) {
        c = fgetc (f);
        if (!isspace (c)) {
          if (c == '#') { // Skip comment
            while (!feof (f) && (c = fgetc (f)) != '\n')
              ;
          }
          else {
            ungetc (c, f);
            break;
          }
        }
      }
    }

    static int verify_pbm (FILE *f, int x, int y) {
      u_int16_t magic;
      unsigned int width, height;
      int c;

      if (fread (&magic, 1, 2, f) < 2) {
        return -1;
      }

      if (magic != 0x3450) {
        return -1;
      }

      skip_whitespaces(f);
      width = 0;
      fscanf (f, "%u", &width);
      if (width != x) {
        return -1;
      }
      skip_whitespaces (f);
      fscanf (f, "%u", &height);
      if (height != y) {
        return -1;
      }
      c = fgetc (f);
      if (!isspace (c)) {
        return -1;
      }
      return 0;
    }

    int main(int argc, char **argv)
    {
      njb_t njbs[NJB_MAX_DEVICES], *njb;
      int n, opt, debug;
      extern int optind;
      extern char *optarg;
      char *path;
      int x, y, bytes;

      debug = 0;
      while ( (opt = getopt(argc, argv, "D:")) != -1 ) {
        switch (opt) {
        case 'D':
          debug= atoi(optarg);
          break;
        default:
          usage();
        }
      }

      argc -= optind;
      argv += optind;

      if ( argc != 1 ) usage();

      if ( debug ) NJB_Set_Debug(debug);

      path= argv[0];

      printf("Uploading image:\n");
      printf("Filename:     %s\n", path);

      if (NJB_Discover(njbs, 0, &n) == -1) {
        fprintf(stderr, "could not locate any jukeboxes\n");
        return 1;
      }

      if ( n == 0 ) {
        fprintf(stderr, "no NJB devices found\n");
        return 0;
      }

      njb = njbs;

      if ( NJB_Open(njb) == -1 ) {
        NJB_Error_Dump(njb,stderr);
        return 1;
      }

      NJB_Capture(njb);

      /* Get the bitmap dimensions */
      if ( NJB_Get_Bitmap_Dimensions(njb, &x, &y, &bytes) == -1 ) {
        printf("This device does not support setting the bitmap.");
        NJB_Error_Dump(njb, stderr);
      } else {
          FILE *f;
          unsigned char data[1088];

          if ( (f = fopen(path, "rb")) == NULL) {
            printf("Could not open bitmap file.\n");
            exit(-1);
          }

          if (verify_pbm(f, x, y) == -1) {
            printf("Bad bitmap dimensions or bad file.\n");
            fclose (f);
            exit(-1);
          }

          if ( fread (data, 1, 1088, f) < 1088 ) {
            printf("Could not read in bitmap file.\n");
            fclose (f);
            exit(-1);
          }

          fclose (f);

          if ( NJB_Set_Bitmap(njb, data) == -1 ) {
            NJB_Error_Dump(njb, stderr);
          }
      }

      NJB_Release(njb);

      NJB_Close (njb);

      return 0;
    }