/* Copyright (C) 1995, 1996, 1998, 1999 artofcode LLC.  All rights reserved.
  
  This program is free software; you can redistribute it and/or modify it
  under the terms of the GNU General Public License as published by the
  Free Software Foundation; either version 2 of the License, or (at your
  option) any later version.

  This program is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  General Public License for more details.

  You should have received a copy of the GNU General Public License along
  with this program; if not, write to the Free Software Foundation, Inc.,
  59 Temple Place, Suite 330, Boston, MA, 02111-1307.

*/

/*$Id: gxline.h,v 1.2.6.1.2.1 2003/01/17 00:49:04 giles Exp $ */
/* Private line parameter definitions */

#ifndef gxline_INCLUDED
#  define gxline_INCLUDED

#include "gslparam.h"
#include "gsmatrix.h"

/* Line parameter structures */
/* gx_dash_params are never instantiated by themselves. */
typedef struct gx_dash_params_s {
    float *pattern;
    uint pattern_size;
    float offset;
    bool adapt;
    /* The rest of the parameters are computed from the above */
    float pattern_length;	/* total of all pattern elements */
    bool init_ink_on;		/* true if ink is initially on */
    int init_index;		/* initial index in pattern */
    float init_dist_left;
} gx_dash_params;

#define gx_dash_params_initial\
  NULL, 0, 0.0, 0/*false*/, 0.0, 1/*true*/, 0, 0.0
typedef struct gx_line_params_s {
    float half_width;		/* one-half line width */
    gs_line_cap cap;
    gs_line_join join;
    int curve_join;		/* <0 means use join between segments of */
				/* flattened curves, >=0 means use this join */
    float miter_limit;
    float miter_check;		/* computed from miter limit, */
				/* see gx_set_miter_limit and gs_stroke */
    float dot_length;
    bool dot_length_absolute;	/* if true, dot_length is 1/72" units */
    gs_matrix dot_orientation;	/* dot length is aligned with (1,0); */
				/* must be xxyy or xyyx */
    gx_dash_params dash;
} gx_line_params;

#define gx_set_line_width(plp, wid)\
  ((plp)->half_width = (wid) / 2)
#define gx_current_line_width(plp)\
  ((plp)->half_width * 2)
int gx_set_miter_limit(P2(gx_line_params *, floatp));

#define gx_current_miter_limit(plp)\
  ((plp)->miter_limit)
int gx_set_dash(P5(gx_dash_params *, const float *, uint, floatp,
		   gs_memory_t *));

#define gx_set_dash_adapt(pdp, adpt) ((pdp)->adapt = (adpt))
int gx_set_dot_length(P3(gx_line_params *, floatp, bool));

/* See gsline.c for the computation of miter_check. */
#define gx_line_params_initial\
 0.0, gs_cap_butt, gs_join_miter, gs_join_bevel /* for Adobe compatibility */,\
 10.0, 0.20305866, 0.0, 0/*false*/,\
  { identity_matrix_body }, { gx_dash_params_initial }

#endif /* gxline_INCLUDED */