xref: /external/harfbuzz_ng/src/hb-ot-layout-private.hh

/*
 * Copyright (C) 2007,2008,2009  Red Hat, Inc.
 *
 *  This is part of HarfBuzz, an OpenType Layout engine library.
 *
 * Permission is hereby granted, without written agreement and without
 * license or royalty fees, to use, copy, modify, and distribute this
 * software and its documentation for any purpose, provided that the
 * above copyright notice and the following two paragraphs appear in
 * all copies of this software.
 *
 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 *
 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
 *
 * Red Hat Author(s): Behdad Esfahbod
 */

#ifndef HB_OT_LAYOUT_PRIVATE_H
#define HB_OT_LAYOUT_PRIVATE_H

#include "hb-private.h"
#include "hb-ot-layout.h"

/* XXX */
#include "hb-buffer.h"


typedef unsigned int hb_ot_layout_class_t;

struct _hb_ot_layout_t
{
  const struct GDEF *gdef;
  const struct GSUB *gsub;
  const struct GPOS *gpos;

  struct
  {
    unsigned char *klasses;
    unsigned int len;
  } new_gdef;

  /* TODO full-matrix transformation? */
  struct gpos_info_t
  {
    unsigned int x_ppem, y_ppem;
    hb_16dot16_t x_scale, y_scale;

    hb_bool_t dvi;
    hb_bool_t r2l;

    unsigned int last;        /* the last valid glyph--used with cursive positioning */
    hb_position_t anchor_x;   /* the coordinates of the anchor point */
    hb_position_t anchor_y;   /* of the last valid glyph */
  } gpos_info;
};


HB_BEGIN_DECLS

/*
 * GDEF
 */

HB_INTERNAL hb_bool_t
_hb_ot_layout_has_new_glyph_classes (hb_ot_layout_t *layout);

HB_INTERNAL unsigned int
_hb_ot_layout_get_glyph_property (hb_ot_layout_t *layout,
				  hb_codepoint_t  glyph);

HB_INTERNAL void
_hb_ot_layout_set_glyph_property (hb_ot_layout_t *layout,
				  hb_codepoint_t  glyph,
				  unsigned int    property);

HB_INTERNAL hb_bool_t
_hb_ot_layout_check_glyph_property (hb_ot_layout_t  *layout,
				    hb_glyph_info_t *ginfo,
				    unsigned int     lookup_flags,
				    unsigned int    *property);

HB_INTERNAL hb_bool_t
_hb_ot_layout_skip_mark (hb_ot_layout_t  *layout,
			  hb_glyph_info_t *ginfo,
			  unsigned int     lookup_flags,
			  unsigned int    *property);

HB_END_DECLS

#endif /* HB_OT_LAYOUT_PRIVATE_H */