1 /* Copyright (C) 1995, 1996 Aladdin Enterprises. All rights reserved. 2 3 This software is provided AS-IS with no warranty, either express or 4 implied. 5 6 This software is distributed under license and may not be copied, 7 modified or distributed except as expressly authorized under the terms 8 of the license contained in the file LICENSE in this distribution. 9 10 For more information about licensing, please refer to 11 http://www.ghostscript.com/licensing/. For information on 12 commercial licensing, go to http://www.artifex.com/licensing/ or 13 contact Artifex Software, Inc., 101 Lucas Valley Road #110, 14 San Rafael, CA 94903, U.S.A., +1(415)492-9861. 15 */ 16 17 /* $Id: gxhttile.h,v 1.4 2002/02/21 22:24:53 giles Exp $ */ 18 /* Halftone tile definition */ 19 /* Requires gxbitmap.h */ 20 21 #ifndef gxhttile_INCLUDED 22 # define gxhttile_INCLUDED 23 24 /* 25 * A halftone tile is just an ordinary bitmap tile, plus a couple of other 26 * items associated with managing its existence in a tile cache. 27 * (See gzht.h for details.) We define this in its own file so that 28 * clients of gx_device_color can access it. 29 */ 30 31 #ifndef gx_ht_tile_DEFINED 32 # define gx_ht_tile_DEFINED 33 typedef struct gx_ht_tile_s gx_ht_tile; 34 35 #endif 36 37 struct gx_ht_tile_s { 38 gx_strip_bitmap tiles; /* the currently rendered tile */ 39 int level; /* the cached gray level, i.e. */ 40 /* the number of spots whitened, */ 41 /* or -1 if the cache is empty */ 42 uint index; /* the index of the tile within */ 43 /* the cache (for GC) */ 44 }; 45 46 #endif /* gxhttile_INCLUDED */ 47