/* ftfont.h -- Interface definition for Freetype font backend.
   Copyright (C) 2007, 2008, 2009, 2010, 2011
     National Institute of Advanced Industrial Science and Technology (AIST)
     Registration Number H13PRO009

This file is part of GNU Emacs.

GNU Emacs 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 3 of the License, or (at
your option) any later version.

GNU Emacs 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 GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.  */


#ifndef EMACS_FTFONT_H
#define EMACS_FTFONT_H

#include <ft2build.h>
#include FT_FREETYPE_H
#include FT_SIZES_H
#ifdef FT_BDF_H
# include FT_BDF_H
#endif

#ifdef HAVE_HARFBUZZ
#include <hb.h>
#include <hb-ft.h>
#endif  /* HAVE_HARFBUZZ */

#ifdef HAVE_LIBOTF
# include <otf.h>
#ifdef HAVE_M17N_FLT
# include <m17n-flt.h>
#endif	/* HAVE_M17N_FLT */
#endif	/* HAVE_LIBOTF */

extern void ftfont_fix_match (FcPattern *, FcPattern *);
extern void ftfont_add_rendering_parameters (FcPattern *, Lisp_Object);
extern FcPattern *ftfont_entity_pattern (Lisp_Object, int);

/* This struct is shared by the XFT, Freetype, and Cairo font
   backends.  Members up to and including 'matrix' are common, the
   rest depend on which backend is in use.  */
struct font_info
{
  struct font font;
#ifdef HAVE_LIBOTF
  bool maybe_otf;	/* Flag to tell if this may be OTF or not.  */
  OTF *otf;
#endif	/* HAVE_LIBOTF */
  FT_Size ft_size;
  int index;
  FT_Matrix matrix;
#ifdef HAVE_HARFBUZZ
  hb_font_t *hb_font;
#endif  /* HAVE_HARFBUZZ */

#ifdef USE_CAIRO
  cairo_scaled_font_t *cr_scaled_font;
  /* Scale factor from the bitmap strike metrics in 1/64 pixels, used
     as the hb_position_t value in HarfBuzz, to those in (scaled)
     pixels.  The value is 0 for scalable fonts.  */
  double bitmap_position_unit;
  /* Font metrics cache.  */
  struct font_metrics **metrics;
  short metrics_nrows;
#elif defined (HAVE_HAIKU)
  FT_Face face;
  void *sc;
#else
  /* These are used by the XFT backend.  */
  Display *display;
  XftFont *xftfont;
  unsigned x_display_id;
#endif
};

#endif	/* EMACS_FTFONT_H */