Processing – Pimage – loadTIFF | Codetter（こーどったー）

static protected PImage loadTIFF(byte tiff[]) {
    if ((tiff[42] != tiff[102]) ||  // width/height in both places
        (tiff[43] != tiff[103])) {
      System.err.println(TIFF_ERROR);
      return null;
    }

    int width =
      ((tiff[30] & 0xff) << 8) | (tiff[31] & 0xff);
    int height =
      ((tiff[42] & 0xff) << 8) | (tiff[43] & 0xff);

    int count =
      ((tiff[114] & 0xff) << 24) |
      ((tiff[115] & 0xff) << 16) |
      ((tiff[116] & 0xff) << 8) |
      (tiff[117] & 0xff);
    if (count != width * height * 3) {
      System.err.println(TIFF_ERROR + " (" + width + ", " + height +")");
      return null;
    }

    // check the rest of the header
    for (int i = 0; i < TIFF_HEADER.length; i++) {
      if ((i == 30) || (i == 31) || (i == 42) || (i == 43) ||
          (i == 102) || (i == 103) ||
          (i == 114) || (i == 115) || (i == 116) || (i == 117)) continue;

      if (tiff[i] != TIFF_HEADER[i]) {
        System.err.println(TIFF_ERROR + " (" + i + ")");
        return null;
      }
    }

    PImage outgoing = new PImage(width, height, RGB);
    int index = 768;
    count /= 3;
    for (int i = 0; i < count; i++) {
      outgoing.pixels[i] =
        0xFF000000 |
        (tiff[index++] & 0xff) << 16 |
        (tiff[index++] & 0xff) << 8 |
        (tiff[index++] & 0xff);
    }
    return outgoing;
  }