/* Copyright (C) 1995, 1996 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: gzacpath.h,v 1.5.2.1 2003/12/12 22:08:04 giles Exp $ */
/* State and interface definitions for clipping path accumulator */
/* Requires gxdevice.h, gzcpath.h */

#ifndef gzacpath_INCLUDED
#  define gzacpath_INCLUDED

/*
 * Device for accumulating a rectangle list.  This device can clip
 * the list being accumulated with a clipping rectangle on the fly:
 * we use this to clip clipping paths to band boundaries when
 * rendering a band list.
 */
typedef struct gx_device_cpath_accum_s {
    gx_device_common;
    gs_memory_t *list_memory;
    gs_int_rect clip_box;
    gs_int_rect bbox;
    gx_clip_list list;
} gx_device_cpath_accum;

/* Start accumulating a clipping path. */
void gx_cpath_accum_begin(gx_device_cpath_accum * padev, gs_memory_t * mem);

/* Set the accumulator's clipping box. */
void gx_cpath_accum_set_cbox(gx_device_cpath_accum * padev,
			     const gs_fixed_rect * pbox);

/* Finish accumulating a clipping path. */
/* Note that this releases the old contents of the clipping path. */
int gx_cpath_accum_end(const gx_device_cpath_accum * padev,
		       gx_clip_path * pcpath);

/* Discard an accumulator in case of error. */
void gx_cpath_accum_discard(gx_device_cpath_accum * padev);

/* Intersect two clipping paths using an accumulator. */
int gx_cpath_intersect_path_slow(gx_clip_path *, gx_path *, int,
					gs_imager_state *);

#endif /* gzacpath_INCLUDED */
