/* writetype0.c
   
   Copyright 2006-2008 Taco Hoekwater <taco@luatex.org>

   This file is part of LuaTeX.

   LuaTeX is free software; you can redistribute it and/or modify it under
   the terms of the GNU General Public License as published by the Free
   Software Foundation; either version 2 of the License, or (at your
   option) any later version.

   LuaTeX is distributed in the hope that it will be useful, but WITHOUT
   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
   License for more details.

   You should have received a copy of the GNU General Public License along
   with LuaTeX; if not, see <http://www.gnu.org/licenses/>. */

#include "ptexlib.h"
#include "writettf.h"
#include "writecff.h"

static const char _svn_version[] =
    "$Id: writetype0.c 3400 2010-01-27 16:10:42Z taco $ $URL: http://foundry.supelec.fr/svn/luatex/tags/beta-0.51.0/source/texk/web2c/luatexdir/font/writetype0.c $";

void writetype0(PDF pdf, fd_entry * fd)
{
    int callback_id;
    int file_opened = 0;
    long i;
    dirtab_entry *tab;
    cff_font *cff;

    dir_tab = NULL;
    glyph_tab = NULL;

    fd_cur = fd;                /* fd_cur is global inside writettf.c */
    assert(fd_cur->fm != NULL);
    assert(is_opentype(fd_cur->fm));
    assert(is_included(fd_cur->fm));

    ttf_curbyte = 0;
    ttf_size = 0;
    cur_file_name =
        luatex_find_file(fd_cur->fm->ff_name, find_opentype_file_callback);
    if (cur_file_name == NULL) {
        pdftex_fail("cannot find OpenType font file for reading");
    }
    callback_id = callback_defined(read_opentype_file_callback);
    if (callback_id > 0) {
        if (run_callback(callback_id, "S->bSd", cur_file_name,
                         &file_opened, &ttf_buffer, &ttf_size) &&
            file_opened && ttf_size > 0) {
        } else {
            pdftex_fail("cannot open OpenType font file for reading");
        }
    } else {
        if (!otf_open(cur_file_name)) {
            pdftex_fail("cannot open OpenType font file for reading");
        }
        ttf_read_file();
        ttf_close();
    }

    fd_cur->ff_found = true;

    if (tracefilenames) {
        if (is_subsetted(fd_cur->fm))
            tex_printf("<%s", cur_file_name);
        else
            tex_printf("<<%s", cur_file_name);
    }
    ttf_read_tabdir();
    /* read font parameters */
    if (ttf_name_lookup("head", false) != NULL)
        ttf_read_head();
    if (ttf_name_lookup("hhea", false) != NULL)
        ttf_read_hhea();
    if (ttf_name_lookup("PCLT", false) != NULL)
        ttf_read_pclt();
    if (ttf_name_lookup("post", false) != NULL)
        ttf_read_post();

    /* copy font file */
    tab = ttf_seek_tab("CFF ", 0);

    /* TODO the next 0 is a subfont index */
    cff = read_cff(ttf_buffer + ttf_curbyte, (long) tab->length, 0);
    if (!is_subsetted(fd_cur->fm)) {
        /* not subsetted, just do a copy */
        for (i = (long) tab->length; i > 0; i--)
            fb_putchar(pdf, (eight_bits) ttf_getnum(1));
    } else {
        if (cff != NULL) {
            if (cff_is_cidfont(cff)) {
                write_cid_cff(pdf, cff, fd_cur);
                /*
                   for (i = tab->length; i > 0; i--)
                   fb_putchar (ttf_getnum(1));
                 */
            } else {
                write_cff(pdf, cff, fd_cur);
            }
        } else {
            /* not understood, just do a copy */
            for (i = (long) tab->length; i > 0; i--)
                fb_putchar(pdf, (eight_bits) ttf_getnum(1));
        }
    }
    xfree(dir_tab);
    xfree(ttf_buffer);
    if (tracefilenames) {
        if (is_subsetted(fd_cur->fm))
            tex_printf(">");
        else
            tex_printf(">>");
    }
    cur_file_name = NULL;
}
