/* Copyright (C) 1989, 1995, 1996, 1997, 1998, 1999 Aladdin Enterprises.  All rights reserved.
  
  This file is part of GNU Ghostscript.
  
  GNU Ghostscript is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY.  No author or distributor accepts responsibility
  to anyone for the consequences of using it or for whether it serves any
  particular purpose or works at all, unless he says so in writing.  Refer
  to the GNU General Public License for full details.
  
  Everyone is granted permission to copy, modify and redistribute GNU
  Ghostscript, but only under the conditions described in the GNU General
  Public License.  A copy of this license is supposed to have been given
  to you along with GNU Ghostscript so you can know your rights and
  responsibilities.  It should be in a file named COPYING.  Among other
  things, the copyright notice and this notice must be preserved on all
  copies.
*/

/*$RCSfile: gspath.h,v $ $Revision: 1.2.2.1 $ */
/* Graphics state path procedures */
/* Requires gsstate.h */

#ifndef gspath_INCLUDED
#  define gspath_INCLUDED

#include "gspenum.h"

/* Path constructors */
int gs_newpath(P1(gs_state *)),
    gs_moveto(P3(gs_state *, floatp, floatp)),
    gs_rmoveto(P3(gs_state *, floatp, floatp)),
    gs_lineto(P3(gs_state *, floatp, floatp)),
    gs_rlineto(P3(gs_state *, floatp, floatp)),
    gs_arc(P6(gs_state *, floatp, floatp, floatp, floatp, floatp)),
    gs_arcn(P6(gs_state *, floatp, floatp, floatp, floatp, floatp)),
    /*
     * Because of an obscure bug in the IBM RS/6000 compiler, one (but not
     * both) bool argument(s) for gs_arc_add must come before the floatp
     * arguments.
     */
    gs_arc_add(P8(gs_state *, bool, floatp, floatp, floatp, floatp, floatp, bool)),
    gs_arcto(P7(gs_state *, floatp, floatp, floatp, floatp, floatp, float[4])),
    gs_curveto(P7(gs_state *, floatp, floatp, floatp, floatp, floatp, floatp)),
    gs_rcurveto(P7(gs_state *, floatp, floatp, floatp, floatp, floatp, floatp)),
    gs_closepath(P1(gs_state *));

/* Imager-level procedures */
#ifndef gs_imager_state_DEFINED
#  define gs_imager_state_DEFINED
typedef struct gs_imager_state_s gs_imager_state;
#endif
#ifndef gx_path_DEFINED
#  define gx_path_DEFINED
typedef struct gx_path_s gx_path;
#endif
int gs_imager_arc_add(P9(gx_path * ppath, gs_imager_state * pis,
			 bool clockwise, floatp axc, floatp ayc,
			 floatp arad, floatp aang1, floatp aang2,
			 bool add_line));

#define gs_arc_add_inline(pgs, cw, axc, ayc, arad, aa1, aa2, add)\
  gs_imager_arc_add((pgs)->path, (gs_imager_state *)(pgs),\
		    cw, axc, ayc, arad, aa1, aa2, add)

/* Add the current path to the path in the previous graphics state. */
int gs_upmergepath(P1(gs_state *));

/* Path accessors and transformers */
int gs_currentpoint(P2(gs_state *, gs_point *)),
      gs_upathbbox(P3(gs_state *, gs_rect *, bool)),
      gs_dashpath(P1(gs_state *)),
      gs_flattenpath(P1(gs_state *)),
      gs_reversepath(P1(gs_state *)),
      gs_strokepath(P1(gs_state *));

/* The extra argument for gs_upathbbox controls whether to include */
/* a trailing moveto in the bounding box. */
#define gs_pathbbox(pgs, prect)\
  gs_upathbbox(pgs, prect, false)

/* Path enumeration */

/* This interface conditionally makes a copy of the path. */
gs_path_enum *
             gs_path_enum_alloc(P2(gs_memory_t *, client_name_t));
int gs_path_enum_copy_init(P3(gs_path_enum *, const gs_state *, bool));

#define gs_path_enum_init(penum, pgs)\
  gs_path_enum_copy_init(penum, pgs, true)
int gs_path_enum_next(P2(gs_path_enum *, gs_point[3]));  /* 0 when done */
void gs_path_enum_cleanup(P1(gs_path_enum *));

/* Clipping */
int gs_clippath(P1(gs_state *)),
    gs_initclip(P1(gs_state *)),
    gs_clip(P1(gs_state *)),
    gs_eoclip(P1(gs_state *));

#endif /* gspath_INCLUDED */
