/* Copyright (C) 1995, 1996 Aladdin Enterprises.  All rights reserved.
  
  This file is part of AFPL Ghostscript.
  
  AFPL Ghostscript is distributed with NO WARRANTY OF ANY KIND.  No author or
  distributor accepts any responsibility for the consequences of using it, or
  for whether it serves any particular purpose or works at all, unless he or
  she says so in writing.  Refer to the Aladdin Free Public License (the
  "License") for full details.
  
  Every copy of AFPL Ghostscript must include a copy of the License, normally
  in a plain ASCII text file named PUBLIC.  The License grants you the right
  to copy, modify and redistribute AFPL Ghostscript, but only under certain
  conditions described in the License.  Among other things, the License
  requires that the copyright notice and this notice be preserved on all
  copies.
*/

/*$Id$ */
/* 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(P2(gx_device_cpath_accum * padev, gs_memory_t * mem));

/* Set the accumulator's clipping box. */
void gx_cpath_accum_set_cbox(P2(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(P2(const gx_device_cpath_accum * padev,
			  gx_clip_path * pcpath));

/* Discard an accumulator in case of error. */
void gx_cpath_accum_discard(P1(gx_device_cpath_accum * padev));

#endif /* gzacpath_INCLUDED */