private void writeHeader(
final DataOutputStream stream,
final int xsize,
final int ysize,
final int zsize,
final boolean rle)
throws IOException {
// effects: outputs the 512-byte IRIS RGB header to STREAM, using xsize,
// ysize, and depth as the dimensions of the image. NOTE that
// the following defaults are used:
// STORAGE = 1 (storage format = RLE)
// BPC = 1 (# bytes/channel)
// DIMENSION = 3
// PIXMIN = 0
// PIXMAX = 255
// IMAGENAME = <80 nulls>
// COLORMAP = 0
// See ftp://ftp.sgi.com/pub/sgi/SGIIMAGESPEC for more details.
// write out MAGIC, STORAGE, BPC
stream.writeShort(474);
stream.write((rle ? 1 : 0));
stream.write(1);
// write out DIMENSION
stream.writeShort(3);
// write XSIZE, YSIZE, ZSIZE
stream.writeShort(xsize);
stream.writeShort(ysize);
stream.writeShort(zsize);
// write PIXMIN, PIXMAX
stream.writeInt(0);
stream.writeInt(255);
// write DUMMY
stream.writeInt(0);
// write IMAGENAME
for (int i = 0; i < 80; i++) stream.write(0);
// write COLORMAP
stream.writeInt(0);
// write DUMMY (404 bytes)
for (int i = 0; i < 404; i++) stream.write(0);
}
