/* This is dvipdfmx, an eXtended version of dvipdfm by Mark A. Wicks.

   Copyright (C) 2002-2016 by Jin-Hwan Cho and Shunsaku Hirata,
   the dvipdfmx project team.

   This program 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.

   This program 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 General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/

#ifndef _SFNT_H_
#define _SFNT_H_

#include "tectonic_bridge_core.h"

#include <fcntl.h>
#include <stdint.h>
#include <stdio.h>

#include "dpx-mfileio.h"
#include "dpx-numbers.h"
#include "dpx-pdfobj.h"

/* Acoid conflict with CHAR ... from <winnt.h>.  */
#define CHAR SFNT_CHAR
#define ULONG SFNT_ULONG
#define LONG SFNT_LONG

/* Data Types as described in Apple's TTRefMan */
typedef unsigned char  BYTE;
typedef signed char    CHAR;
typedef unsigned short USHORT;
typedef signed short   SHORT;
typedef uint32_t       ULONG;
typedef int32_t        LONG;
typedef uint32_t       Fixed;   /* 16.16-bit signed fixed-point number */
typedef short          FWord;
typedef unsigned short uFWord;

struct sfnt_table
{
    /* table header */
    char   tag[4];
    ULONG  check_sum;
    ULONG  offset;
    ULONG  length;
    char  *data;   /* table data */
};

#define SFNT_TABLE_REQUIRED (1 << 0)

struct sfnt_table_directory
{
    ULONG   version;         /* Fixed for Win */
    USHORT  num_tables;
    USHORT  search_range;
    USHORT  entry_selector;
    USHORT  range_shift;
    USHORT  num_kept_tables; /* number of kept tables */
    char   *flags;           /* keep or omit */
    struct  sfnt_table *tables;
};

/* sfnt resource */
#define SFNT_TYPE_TRUETYPE   (1 << 0)
#define SFNT_TYPE_OPENTYPE   (1 << 1)
#define SFNT_TYPE_POSTSCRIPT (1 << 2)
#define SFNT_TYPE_TTC        (1 << 4)
#define SFNT_TYPE_DFONT      (1 << 8)

typedef struct
{
    int    type;
    struct sfnt_table_directory *directory;
    rust_input_handle_t handle;
    ULONG  offset;
} sfnt;

/* Convert sfnt "fixed" type to double */
#define fixed(a) ((double)((a)%0x10000L)/(double)(0x10000L) +           \
                  (a)/0x10000L - (((a)/0x10000L > 0x7fffL) ? 0x10000L : 0))

/* get_***_*** from numbers.h */
#define sfnt_get_byte(s)   ((BYTE)   tt_get_unsigned_byte((s)->handle))
#define sfnt_get_char(s)   ((CHAR)   tt_get_signed_byte  ((s)->handle))
#define sfnt_get_ushort(s) ((USHORT) tt_get_unsigned_pair((s)->handle))
#define sfnt_get_short(s)  ((SHORT)  tt_get_signed_pair  ((s)->handle))
#define sfnt_get_ulong(s)  ((ULONG)  tt_get_unsigned_quad((s)->handle))
#define sfnt_get_long(s)   ((LONG)   tt_get_signed_quad  ((s)->handle))

#define sfnt_seek_set(s,o)   ttstub_input_seek((s)->handle, (o), SEEK_SET)
#define sfnt_read(b,l,s)     ttstub_input_read((s)->handle, (char *) (b), (l))

int  put_big_endian (void *s, LONG q, int n);

#define sfnt_put_ushort(s,v) put_big_endian((s), v, 2);
#define sfnt_put_short(s,v)  put_big_endian((s), v, 2);
#define sfnt_put_ulong(s,v)  put_big_endian((s), v, 4);
#define sfnt_put_long(s,v)   put_big_endian((s), v, 4);

sfnt *sfnt_open  (rust_input_handle_t handle);
sfnt *dfont_open (rust_input_handle_t handle, int index);
void  sfnt_close (sfnt *sfont);

/* table directory */
int   sfnt_read_table_directory (sfnt *sfont, ULONG offset);
ULONG sfnt_find_table_len       (sfnt *sfont, const char *tag);
ULONG sfnt_find_table_pos       (sfnt *sfont, const char *tag);
ULONG sfnt_locate_table         (sfnt *sfont, const char *tag);

void  sfnt_set_table     (sfnt *sfont,
                                 const char *tag, void *data, ULONG length);
int   sfnt_require_table (sfnt *sfont, const char *tag, int must_exist);

pdf_obj *sfnt_create_FontFile_stream (sfnt *sfont);

#endif /* _SFNT_H_ */