/* Copyright (C) 1997, 1998 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.
 */

/*$Id: zchar32.c $ */
/* 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 "gxchar.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(os_ptr op)
{
    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(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(os_ptr op)
{
    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> <w0x> ... <vy> 5/14 */
/* <str5/14/22> .getmetrics32 <width> <height> <wx> ... <ury> 22 */
private int
zgetmetrics32(os_ptr op)
{
    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)
};
