/* Copyright (C) 2001-2023 Artifex Software, Inc.
   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.

   Refer to licensing information at http://www.artifex.com or contact
   Artifex Software, Inc.,  39 Mesa Street, Suite 108A, San Francisco,
   CA 94129, USA, for further information.
*/


/* 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>> */
static 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(gs_error_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(gs_error_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(gs_error_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(gs_error_invalidfont);
    check_write_type(*op, t_string);
    if (r_size(op) < 22)
        return_error(gs_error_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;
static 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);
}
static 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(gs_error_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 */
static 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(gs_error_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(gs_error_rangecheck);
            n = 10;
            size = 22;
        } else {
            /* Long form, WMode = 0 only. */
            if (size < 14)
                return_error(gs_error_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)
};