/* Portions Copyright (C) 2001 artofcode LLC.
   Portions Copyright (C) 1996, 2001 Artifex Software Inc.
   Portions Copyright (C) 1988, 2000 Aladdin Enterprises.
   This software is based in part on the work of the Independent JPEG Group.
   All Rights Reserved.

   This software is distributed under license and may not be copied, modified
   or distributed except as expressly authorized under the terms of that
   license.  Refer to licensing information at http://www.artifex.com/ or
   contact Artifex Software, Inc., 101 Lucas Valley Road #110,
   San Rafael, CA  94903, (415)492-9861, for further information. */

/*$RCSfile: zchar32.c,v $ $Revision: 1.12 $ */
/* 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(imemory, op[-4]);
    msize = r_size(op - 4);
    switch (msize) {
	case 10:
	    long_form = true;
	    break;
	case 6:
	    long_form = false;
	    break;
	default:
	    return_error(imemory, e_rangecheck);
    }
    code = num_params(imemory, op[-4].value.refs + msize - 1, msize, metrics);
    if (code < 0)
	return code;
    if (~code & 0x3c)		/* check llx .. ury for integers */
	return_error(imemory, e_typecheck);
    check_read_type(imemory, 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(imemory, e_rangecheck);
    check_int_leu(imemory, op[-2], 65535);
    code = font_param(imemory, op - 1, &pfont);
    if (code < 0)
	return code;
    if (pfont->FontType != ft_CID_bitmap)
	return_error(imemory, e_invalidfont);
    check_write_type(imemory, *op, t_string);
    if (r_size(op) < 22)
	return_error(imemory, 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(imemory, op[-2], 65535);
    check_int_leu(imemory, op[-1], 65535);
    code = font_param(imemory, op, &range.font);
    if (code < 0)
	return code;
    if (range.font->FontType != ft_CID_bitmap)
	return_error(imemory, 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(imemory, *op, t_string);
    data = op->value.const_bytes;
    size = r_size(op);
    if (size < 5)
	return_error(imemory, e_rangecheck);
    if (data[0]) {
	/* Short form. */
	int llx = (int)data[3] - 128, lly = (int)data[4] - 128;

	n = 6;
	size = 5;
	push(imemory, 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(imemory, e_rangecheck);
	    n = 10;
	    size = 22;
	} else {
	    /* Long form, WMode = 0 only. */
	    if (size < 14)
		return_error(imemory, e_rangecheck);
	    n = 6;
	    size = 14;
	}
	push(imemory, 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)
};
