rle_code.h

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/*
 * This software is copyrighted as noted below.  It may be freely copied,
 * modified, and redistributed, provided that the copyright notice is 
 * preserved on all copies.
 * 
 * There is no warranty or other guarantee of fitness for this software,
 * it is provided solely "as is".  Bug reports or fixes may be sent
 * to the author, who may or may not act on them as he desires.
 *
 * You may not include this software in a program or other software product
 * without supplying the source, or without informing the end-user that the 
 * source is available for no extra charge.
 *
 * If you modify this software, you should include a notice giving the
 * name of the person performing the modification, the date of modification,
 * and the reason for such modification.
 */
/* 
 * rle_code.h - Definitions for Run Length Encoding.
 * 
 * Author:  Spencer W. Thomas
 *      Computer Science Dept.
 *      University of Utah
 * Date:    Mon Aug  9 1982
 * Copyright (c) 1982 Spencer W. Thomas
 * 
 * $Header: /usr/users/spencer/src/urt/include/RCS/rle_code.h,v 3.0 90/08/03 15:19:48 spencer Exp $
 */

#ifndef RLE_MAGIC

/* 
 * Opcode definitions
 */

#define     LONG                0x40
#define     RSkipLinesOp    1
#define     RSetColorOp     2
#define     RSkipPixelsOp   3
#define     RByteDataOp     5
#define     RRunDataOp      6
#define     REOFOp      7

#define     H_CLEARFIRST        0x1 /* clear framebuffer flag */
#define     H_NO_BACKGROUND 0x2 /* if set, no bg color supplied */
#define     H_ALPHA     0x4   /* if set, alpha channel (-1) present */
#define     H_COMMENT       0x8 /* if set, comments present */

struct XtndRsetup
{
    char    hc_xpos[2],
            hc_ypos[2],
            hc_xlen[2],
            hc_ylen[2];
    char    h_flags,
            h_ncolors,
        h_pixelbits,
        h_ncmap,
        h_cmaplen;
};
#define     SETUPSIZE   ((4*2)+5)

/* "Old" RLE format magic numbers */
#define     RMAGIC  ('R' << 8)  /* top half of magic number */
#define     WMAGIC  ('W' << 8)  /* black&white rle image */

#define     RLE_MAGIC   ((short)0xcc52) /* RLE file magic number */

#endif /* RLE_MAGIC */