harvey/sys/src/cmd/gs/src/gxclip2.h

/* Copyright (C) 1993, 1996, 1998, 1999 Aladdin Enterprises.  All rights reserved.
  
  This software is provided AS-IS with no warranty, either express or
  implied.
  
  This software is distributed under license and may not be copied,
  modified or distributed except as expressly authorized under the terms
  of the license contained in the file LICENSE in this distribution.
  
  For more information about licensing, please refer to
  http://www.ghostscript.com/licensing/. For information on
  commercial licensing, go to http://www.artifex.com/licensing/ or
  contact Artifex Software, Inc., 101 Lucas Valley Road #110,
  San Rafael, CA  94903, U.S.A., +1(415)492-9861.
*/

/* $Id: gxclip2.h,v 1.5 2002/06/16 08:45:43 lpd Exp $ */
/* Tiled mask clipping device and interface */

#ifndef gxclip2_INCLUDED
#  define gxclip2_INCLUDED

#include "gxmclip.h"

/* The structure for tile clipping is the same as for simple mask clipping. */
typedef gx_device_mask_clip gx_device_tile_clip;
#define st_device_tile_clip st_device_mask_clip
/*
 * We can't just make this macro empty, since it is processed as a top-level
 * declaration and would lead to an extraneous semicolon.  The least damage
 * we can do is make it declare a constant (and not static, since static
 * would lead to a compiler warning about an unreferenced variable).
 */
#define private_st_device_tile_clip() /* in gxclip2.c */\
  const byte gxclip2_dummy = 0

/*
 * Initialize a tile clipping device from a mask.
 * We supply an explicit phase.
 */
int tile_clip_initialize(gx_device_tile_clip * cdev,
			 const gx_strip_bitmap * tiles,
			 gx_device * tdev, int px, int py,
			 gs_memory_t *mem);

/*
 * Set the phase of the tile -- used in the tiling loop when
 * the tile doesn't simply fill the plane.
 */
void tile_clip_set_phase(gx_device_tile_clip * cdev, int px, int py);

#endif /* gxclip2_INCLUDED */