/* Copyright (C) 1997, 1998, 1999 Aladdin Enterprises.  All rights reserved.
  
  This software is provided AS-IS with no warranty, either express or
  implied.
  
  This software is distributed under license and may not be copied,
  modified or distributed except as expressly authorized under the terms
  of the license contained in the file LICENSE in this distribution.
  
  For more information about licensing, please refer to
  http://www.ghostscript.com/licensing/. For information on
  commercial licensing, go to http://www.artifex.com/licensing/ or
  contact Artifex Software, Inc., 101 Lucas Valley Road #110,
  San Rafael, CA  94903, U.S.A., +1(415)492-9861.
*/

/* $Id: zchar32.c,v 1.5 2004/08/19 19:33:09 stefan Exp $ */
/* Type 32 font glyph operators */
#include "ghost.h"
#include "oper.h"
#include "gsccode.h"		/* for gxfont.h */
#include "gsmatrix.h"
#include "gsutil.h"
#include "gxfixed.h"
#include "gxfont.h"
#include "gxfcache.h"
#include "ifont.h"
#include "igstate.h"
#include "store.h"

/* ([wx wy llx lly urx ury] | [w0x w0y llx lly urx ury w1x w1y vx vy]) */
/*   <bitmap> <cid> <type32font> <str22> .makeglyph32 <<same with substr>> */
private int
zmakeglyph32(i_ctx_t *i_ctx_p)
{
    os_ptr op = osp;
    bool long_form;
    uint msize;
    double metrics[10];
    int wx, llx, lly, urx, ury;
    int width, height, raster;
    gs_font *pfont;
    int code;
    byte *str;

    check_array(op[-4]);
    msize = r_size(op - 4);
    switch (msize) {
	case 10:
	    long_form = true;
	    break;
	case 6:
	    long_form = false;
	    break;
	default:
	    return_error(e_rangecheck);
    }
    code = num_params(op[-4].value.refs + msize - 1, msize, metrics);
    if (code < 0)
	return code;
    if (~code & 0x3c)		/* check llx .. ury for integers */
	return_error(e_typecheck);
    check_read_type(op[-3], t_string);
    llx = (int)metrics[2];
    lly = (int)metrics[3];
    urx = (int)metrics[4];
    ury = (int)metrics[5];
    width = urx - llx;
    height = ury - lly;
    raster = (width + 7) >> 3;
    if (width < 0 || height < 0 || r_size(op - 3) != raster * height)
	return_error(e_rangecheck);
    check_int_leu(op[-2], 65535);
    code = font_param(op - 1, &pfont);
    if (code < 0)
	return code;
    if (pfont->FontType != ft_CID_bitmap)
	return_error(e_invalidfont);
    check_write_type(*op, t_string);
    if (r_size(op) < 22)
	return_error(e_rangecheck);
    str = op->value.bytes;
    if (long_form || metrics[0] != (wx = (int)metrics[0]) ||
	metrics[1] != 0 || height == 0 ||
	((wx | width | height | (llx + 128) | (lly + 128)) & ~255) != 0
	) {
	/* Use the long form. */
	int i, n = (long_form ? 10 : 6);

	str[0] = 0;
	str[1] = long_form;
	for (i = 0; i < n; ++i) {
	    int v = (int)metrics[i];  /* no floating point widths yet */

	    str[2 + 2 * i] = (byte)(v >> 8);
	    str[2 + 2 * i + 1] = (byte)v;
	}
	r_set_size(op, 2 + n * 2);
    } else {
	/* Use the short form. */
	str[0] = (byte)width;
	str[1] = (byte)height;
	str[2] = (byte)wx;
	str[3] = (byte)(llx + 128);
	str[4] = (byte)(lly + 128);
	r_set_size(op, 5);
    }
    return code;
}

/* <cid_min> <cid_max> <type32font> .removeglyphs - */
typedef struct {
    gs_glyph cid_min, cid_max;
    gs_font *font;
} font_cid_range_t;
private bool
select_cid_range(const gs_memory_t *mem, cached_char * cc, void *range_ptr)
{
    const font_cid_range_t *range = range_ptr;

    return (cc->code >= range->cid_min &&
	    cc->code <= range->cid_max &&
	    cc->pair->font == range->font);
}
private int
zremoveglyphs(i_ctx_t *i_ctx_p)
{
    os_ptr op = osp;
    int code;
    font_cid_range_t range;

    check_int_leu(op[-2], 65535);
    check_int_leu(op[-1], 65535);
    code = font_param(op, &range.font);
    if (code < 0)
	return code;
    if (range.font->FontType != ft_CID_bitmap)
	return_error(e_invalidfont);
    range.cid_min = gs_min_cid_glyph + op[-2].value.intval;
    range.cid_max = gs_min_cid_glyph + op[-1].value.intval;
    gx_purge_selected_cached_chars(range.font->dir, select_cid_range,
				   &range);
    pop(3);
    return 0;
}

/* <str5/14/22> .getmetrics32 <width> <height> <wx> ... <ury> 5/14 */
/* <str5/14/22> .getmetrics32 <width> <height> <w0x> ... <vy> 22 */
private int
zgetmetrics32(i_ctx_t *i_ctx_p)
{
    os_ptr op = osp;
    const byte *data;
    uint size;
    int i, n = 6;
    os_ptr wop;

    check_read_type(*op, t_string);
    data = op->value.const_bytes;
    size = r_size(op);
    if (size < 5)
	return_error(e_rangecheck);
    if (data[0]) {
	/* Short form. */
	int llx = (int)data[3] - 128, lly = (int)data[4] - 128;

	n = 6;
	size = 5;
	push(8);
	make_int(op - 6, data[2]); /* wx */
	make_int(op - 5, 0);	/* wy */
	make_int(op - 4, llx);
	make_int(op - 3, lly);
	make_int(op - 2, llx + data[0]); /* urx */
	make_int(op - 1, lly + data[1]); /* ury */
    } else {
	if (data[1]) {
	    /* Long form, both WModes. */
	    if (size < 22)
		return_error(e_rangecheck);
	    n = 10;
	    size = 22;
	} else {
	    /* Long form, WMode = 0 only. */
	    if (size < 14)
		return_error(e_rangecheck);
	    n = 6;
	    size = 14;
	}
	push(2 + n);
	for (i = 0; i < n; ++i)
	    make_int(op - n + i,
		     ((int)((data[2 * i + 2] << 8) + data[2 * i + 3]) ^ 0x8000)
		       - 0x8000);
    }
    wop = op - n;
    make_int(wop - 2, wop[4].value.intval - wop[2].value.intval);
    make_int(wop - 1, wop[5].value.intval - wop[3].value.intval);
    make_int(op, size);
    return 0;
}

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

const op_def zchar32_op_defs[] =
{
    {"1.getmetrics32", zgetmetrics32},
    {"4.makeglyph32", zmakeglyph32},
    {"3.removeglyphs", zremoveglyphs},
    op_def_end(0)
};