/* Copyright (C) 2001-2006 Artifex Software, Inc.
   All Rights Reserved.
  
  This file is part of GNU ghostscript

  GNU ghostscript is free software; you can redistribute it and/or
  modify it under the terms of the version 2 of the GNU General Public
  License as published by the Free Software Foundation.

  GNU ghostscript 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
  ghostscript; see the file COPYING. If not, write to the Free Software Foundation,
  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

*/

/* $Id: zcharx.c,v 1.9 2008/03/23 15:27:49 Arabidopsis Exp $ */
/* Level 2 character operators */
#include "ghost.h"
#include "oper.h"
#include "gsmatrix.h"		/* for gxfont.h */
#include "gstext.h"
#include "gxfixed.h"		/* for gxfont.h */
#include "gxfont.h"
#include "gxtext.h"
#include "ialloc.h"
#include "ichar.h"
#include "igstate.h"
#include "iname.h"
#include "ibnum.h"
#include "memory_.h"

/* Common setup for glyphshow and .glyphwidth. */
static int
glyph_show_setup(i_ctx_t *i_ctx_p, gs_glyph *pglyph)
{
    os_ptr op = osp;

    switch (gs_currentfont(igs)->FontType) {
	case ft_CID_encrypted:
	case ft_CID_user_defined:
	case ft_CID_TrueType:
	case ft_CID_bitmap:
	    check_int_leu(*op, gs_max_glyph - gs_min_cid_glyph);
	    *pglyph = (gs_glyph) op->value.intval + gs_min_cid_glyph;
	    break;
	default:
	    check_type(*op, t_name);
	    *pglyph = name_index(imemory, op);
    }
    return op_show_enum_setup(i_ctx_p);
}

/* <charname> glyphshow - */
static int
zglyphshow(i_ctx_t *i_ctx_p)
{
    gs_glyph glyph;
    gs_text_enum_t *penum;
    int code;

    if ((code = glyph_show_setup(i_ctx_p, &glyph)) != 0 ||
	(code = gs_glyphshow_begin(igs, glyph, imemory, &penum)) < 0)
	return code;
    *(op_proc_t *)&penum->enum_client_data = zglyphshow;
    if ((code = op_show_finish_setup(i_ctx_p, penum, 1, NULL)) < 0) {
	ifree_object(penum, "zglyphshow");
	return code;
    }
    return op_show_continue_pop(i_ctx_p, 1);
}

/* <charname> .glyphwidth <wx> <wy> */
static int
zglyphwidth(i_ctx_t *i_ctx_p)
{
    gs_glyph glyph;
    gs_text_enum_t *penum;
    int code;

    if ((code = glyph_show_setup(i_ctx_p, &glyph)) != 0 ||
	(code = gs_glyphwidth_begin(igs, glyph, imemory, &penum)) < 0)
	return code;
    if ((code = op_show_finish_setup(i_ctx_p, penum, 1, finish_stringwidth)) < 0) {
	ifree_object(penum, "zglyphwidth");
	return code;
    }
    return op_show_continue_pop(i_ctx_p, 1);
}

/* <string> <numarray|numstring> xshow - */
/* <string> <numarray|numstring> yshow - */
/* <string> <numarray|numstring> xyshow - */
static int
moveshow(i_ctx_t *i_ctx_p, bool have_x, bool have_y)
{
    os_ptr op = osp;
    gs_text_enum_t *penum;
    int code = op_show_setup(i_ctx_p, op - 1);
    int format;
    uint i, size, widths_needed;
    float *values;
    extern bool CPSI_mode;

    if (code != 0)
	return code;
    format = num_array_format(op);
    if (format < 0)
	return format;
    size = num_array_size(op, format);
    values = (float *)ialloc_byte_array(size, sizeof(float), "moveshow");
    if (values == 0)
	return_error(e_VMerror);
    if (CPSI_mode)
	memset(values, 0, size * sizeof(values[0])); /* Safety. */
    if ((code = gs_xyshow_begin(igs, op[-1].value.bytes, r_size(op - 1),
				(have_x ? values : (float *)0),
				(have_y ? values : (float *)0),
				size, imemory, &penum)) < 0) {
	ifree_object(values, "moveshow");
	return code;
    }
    if (CPSI_mode) {
	/* CET 13-29.PS page 2 defines a longer width array
	   then the text requires, and CPSI silently ignores extra elements.
	   So we need to compute exact number of characters 
	   to know how many elements to load and type check. */
	code = gs_text_count_chars(igs, gs_get_text_params(penum), imemory);
	if (code < 0)
	    return code;
	widths_needed = code;
	if (have_x && have_y)
	    widths_needed <<= 1;
    } else
	widths_needed = size;
    for (i = 0; i < widths_needed; ++i) {
	ref value;

	switch (code = num_array_get(imemory, op, format, i, &value)) {
	case t_integer:
	    values[i] = (float)value.value.intval; break;
	case t_real:
	    values[i] = value.value.realval; break;
	case t_null:
	    code = gs_note_error(e_rangecheck);
	    /* falls through */
	default:
	    ifree_object(values, "moveshow");
	    return code;
	}
    }
    if ((code = op_show_finish_setup(i_ctx_p, penum, 2, NULL)) < 0) {
	ifree_object(values, "moveshow");
	return code;
    }
    pop(2);
    return op_show_continue(i_ctx_p);
}
static int
zxshow(i_ctx_t *i_ctx_p)
{
    return moveshow(i_ctx_p, true, false);
}
static int
zyshow(i_ctx_t *i_ctx_p)
{
    return moveshow(i_ctx_p, false, true);
}
static int
zxyshow(i_ctx_t *i_ctx_p)
{
    return moveshow(i_ctx_p, true, true);
}

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

const op_def zcharx_op_defs[] =
{
    op_def_begin_level2(),
    {"1glyphshow", zglyphshow},
    {"1.glyphwidth", zglyphwidth},
    {"2xshow", zxshow},
    {"2xyshow", zxyshow},
    {"2yshow", zyshow},
    op_def_end(0)
};
