/* Copyright (C) 1996, 1997 Aladdin Enterprises.  All rights reserved.
  
  This file is part of Aladdin Ghostscript.
  
  Aladdin 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 Ghostscript Free Public
  License (the "License") for full details.
  
  Every copy of Aladdin 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 Aladdin 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.
*/

/* zchar42.c */
/* Type 42 character display operator */
#include "ghost.h"
#include "errors.h"
#include "oper.h"
#include "gsmatrix.h"
#include "gspaint.h"		/* for gs_fill, gs_stroke */
#include "gspath.h"
#include "gxfixed.h"
#include "gxchar.h"
#include "gxfont.h"
#include "gxfont42.h"
#include "gxistate.h"
#include "gxpath.h"
#include "gzstate.h"		/* only for ->path */
#include "dstack.h"		/* only for systemdict */
#include "estack.h"
#include "ichar.h"
#include "icharout.h"
#include "ifont.h"		/* for font_param */
#include "igstate.h"
#include "store.h"

/* Imported procedures */
int gs_type42_append(P7(uint glyph_index, gs_imager_state *pis,
  gx_path *ppath, const gs_log2_scale_point *pscale, bool charpath_flag,
  int paint_type, gs_font_type42 *pfont));
int gs_type42_get_metrics(P3(gs_font_type42 *pfont, uint glyph_index,
  float psbw[4]));

/* <font> <code|name> <name> <glyph_index> .type42execchar - */
private int type42_fill(P1(os_ptr));
private int type42_stroke(P1(os_ptr));
private int
ztype42execchar(register os_ptr op)
{	gs_font *pfont;
#define pbfont ((gs_font_base *)pfont)
#define pfont42 ((gs_font_type42 *)pfont)
	int code = font_param(op - 3, &pfont);
	gs_show_enum *penum = op_show_find();
	int present;
	double sbw[4];

	if ( code < 0 )
	  return code;
	if ( penum == 0 || (pfont->FontType != ft_TrueType &&
			    pfont->FontType != ft_CID_TrueType)
	   )
	  return_error(e_undefined);
	/*
	 * Any reasonable implementation would execute something like
	 *	1 setmiterlimit 0 setlinejoin 0 setlinecap
	 * here, but apparently the Adobe implementations aren't reasonable.
	 *
	 * If this is a stroked font, set the stroke width.
	 */
	if ( pfont->PaintType )
	  gs_setlinewidth(igs, pfont->StrokeWidth);
	check_estack(3);	/* for continuations */
	/*
	 * Execute the definition of the character.
	 */
	if ( r_is_proc(op) )
	  return zchar_exec_char_proc(op);
	/*
	 * The definition must be a Type 42 glyph index.
	 * Note that we do not require read access: this is deliberate.
	 */
	check_type(*op, t_integer);
	check_ostack(3);	/* for lsb values */
	present = zchar_get_metrics(pbfont, op - 1, sbw);
	if ( present < 0 )
	  return present;
	/* Establish a current point. */
	code = gs_moveto(igs, 0.0, 0.0);
	if ( code < 0 )
	  return code;
	/* Get the metrics and set the cache device. */
	if ( present == metricsNone )
	  { float sbw42[4];
	    int i;

	    code = gs_type42_get_metrics(pfont42, (uint)op->value.intval, sbw42);
	    if ( code < 0 )
	      return code;
	    for ( i = 0; i < 4; ++i )
	      sbw[i] = sbw42[i];
	  }
	return zchar_set_cache(op, pbfont, op - 1,
			       (present == metricsSideBearingAndWidth ?
				sbw : NULL),
			       sbw + 2, &pbfont->FontBBox,
			       type42_fill, type42_stroke);
#undef pfont42
#undef pbfont
}

/* Continue after a CDevProc callout. */
private int type42_finish(P2(os_ptr op, int (*cont)(P1(gs_state *))));
private int
type42_fill(os_ptr op)
{	return type42_finish(op, gs_fill);
}
private int
type42_stroke(os_ptr op)
{	return type42_finish(op, gs_stroke);
}
/* <font> <code|name> <name> <glyph_index> <sbx> <sby> %type42_{fill|stroke} - */
/* <font> <code|name> <name> <glyph_index> %type42_{fill|stroke} - */
private int
type42_finish(os_ptr op, int (*cont)(P1(gs_state *)))
{	gs_font *pfont;
#define pfont42 ((gs_font_type42 *)pfont)
	int code;
	gs_show_enum *penum = op_show_find();
	double sbxy[2];
	gs_point sbpt;
	gs_point *psbpt = 0;
	os_ptr opc = op;

	if ( !r_has_type(op - 3, t_dictionary) )
	  {	check_op(6);
		code = num_params(op, 2, sbxy);
		if ( code < 0 )
		  return code;
		sbpt.x = sbxy[0];
		sbpt.y = sbxy[1];
		psbpt = &sbpt;
		opc -= 2;
	  }
	check_type(*opc, t_integer);
	code = font_param(opc - 3, &pfont);
	if ( code < 0 )
	  return code;
	if ( penum == 0 || (pfont->FontType != ft_TrueType &&
			    pfont->FontType != ft_CID_TrueType)
	   )
	  return_error(e_undefined);
	code = gs_type42_append((uint)opc->value.intval,
				(gs_imager_state *)penum->pgs,
				penum->pgs->path,
				&penum->log2_current_scale,
				gs_show_in_charpath(penum) != cpm_show,
				pfont->PaintType, pfont42);
	if ( code < 0 )
	  return code;
	pop((psbpt == 0 ? 4 : 6));
	return (*cont)(penum->pgs);
#undef pfont42
}

/* ------ Initialization procedure ------ */

BEGIN_OP_DEFS(zchar42_op_defs) {
	{"4.type42execchar", ztype42execchar},
END_OP_DEFS(0) }
