harvey/sys/src/cmd/gs/src/zcharx.c

/* Copyright (C) 1992, 2000 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: zcharx.c,v 1.3 2000/09/19 19:00:52 lpd 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 "ialloc.h"
#include "ichar.h"
#include "igstate.h"
#include "iname.h"
#include "ibnum.h"

/* Common setup for glyphshow and .glyphwidth. */
private 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(op);
    }
    return op_show_enum_setup(i_ctx_p);
}

/* <charname> glyphshow - */
private 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;
    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> */
private 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 - */
private 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;
    float *values;

    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);
    for (i = 0; i < size; ++i) {
	ref value;

	switch (code = num_array_get(op, format, i, &value)) {
	case t_integer:
	    values[i] = 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 = 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 ||
	(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);
}
private int
zxshow(i_ctx_t *i_ctx_p)
{
    return moveshow(i_ctx_p, true, false);
}
private int
zyshow(i_ctx_t *i_ctx_p)
{
    return moveshow(i_ctx_p, false, true);
}
private 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)
};