208 lines
6.0 KiB
C
208 lines
6.0 KiB
C
/*
|
|
* Copyright © 2007,2008,2009 Red Hat, Inc.
|
|
*
|
|
* This is part of HarfBuzz, a text shaping 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_H
|
|
#define HB_OT_LAYOUT_H
|
|
|
|
#include "hb-common.h"
|
|
#include "hb-buffer.h"
|
|
#include "hb-font.h"
|
|
|
|
#include "hb-ot-tag.h"
|
|
|
|
HB_BEGIN_DECLS
|
|
|
|
|
|
#define HB_OT_TAG_GDEF HB_TAG('G','D','E','F')
|
|
#define HB_OT_TAG_GSUB HB_TAG('G','S','U','B')
|
|
#define HB_OT_TAG_GPOS HB_TAG('G','P','O','S')
|
|
|
|
/*
|
|
* GDEF
|
|
*/
|
|
|
|
hb_bool_t
|
|
hb_ot_layout_has_glyph_classes (hb_face_t *face);
|
|
|
|
/* Not that useful. Provides list of attach points for a glyph that a
|
|
* client may want to cache */
|
|
unsigned int
|
|
hb_ot_layout_get_attach_points (hb_face_t *face,
|
|
hb_codepoint_t glyph,
|
|
unsigned int start_offset,
|
|
unsigned int *point_count /* IN/OUT */,
|
|
unsigned int *point_array /* OUT */);
|
|
|
|
/* Ligature caret positions */
|
|
unsigned int
|
|
hb_ot_layout_get_ligature_carets (hb_font_t *font,
|
|
hb_direction_t direction,
|
|
hb_codepoint_t glyph,
|
|
unsigned int start_offset,
|
|
unsigned int *caret_count /* IN/OUT */,
|
|
hb_position_t *caret_array /* OUT */);
|
|
|
|
|
|
/*
|
|
* GSUB/GPOS feature query and enumeration interface
|
|
*/
|
|
|
|
#define HB_OT_LAYOUT_NO_SCRIPT_INDEX ((unsigned int) 0xFFFF)
|
|
#define HB_OT_LAYOUT_NO_FEATURE_INDEX ((unsigned int) 0xFFFF)
|
|
#define HB_OT_LAYOUT_DEFAULT_LANGUAGE_INDEX ((unsigned int) 0xFFFF)
|
|
|
|
unsigned int
|
|
hb_ot_layout_table_get_script_tags (hb_face_t *face,
|
|
hb_tag_t table_tag,
|
|
unsigned int start_offset,
|
|
unsigned int *script_count /* IN/OUT */,
|
|
hb_tag_t *script_tags /* OUT */);
|
|
|
|
hb_bool_t
|
|
hb_ot_layout_table_find_script (hb_face_t *face,
|
|
hb_tag_t table_tag,
|
|
hb_tag_t script_tag,
|
|
unsigned int *script_index);
|
|
|
|
/* Like find_script, but takes zero-terminated array of scripts to test */
|
|
hb_bool_t
|
|
hb_ot_layout_table_choose_script (hb_face_t *face,
|
|
hb_tag_t table_tag,
|
|
const hb_tag_t *script_tags,
|
|
unsigned int *script_index,
|
|
hb_tag_t *chosen_script);
|
|
|
|
unsigned int
|
|
hb_ot_layout_table_get_feature_tags (hb_face_t *face,
|
|
hb_tag_t table_tag,
|
|
unsigned int start_offset,
|
|
unsigned int *feature_count /* IN/OUT */,
|
|
hb_tag_t *feature_tags /* OUT */);
|
|
|
|
unsigned int
|
|
hb_ot_layout_script_get_language_tags (hb_face_t *face,
|
|
hb_tag_t table_tag,
|
|
unsigned int script_index,
|
|
unsigned int start_offset,
|
|
unsigned int *language_count /* IN/OUT */,
|
|
hb_tag_t *language_tags /* OUT */);
|
|
|
|
hb_bool_t
|
|
hb_ot_layout_script_find_language (hb_face_t *face,
|
|
hb_tag_t table_tag,
|
|
unsigned int script_index,
|
|
hb_tag_t language_tag,
|
|
unsigned int *language_index);
|
|
|
|
hb_bool_t
|
|
hb_ot_layout_language_get_required_feature_index (hb_face_t *face,
|
|
hb_tag_t table_tag,
|
|
unsigned int script_index,
|
|
unsigned int language_index,
|
|
unsigned int *feature_index);
|
|
|
|
unsigned int
|
|
hb_ot_layout_language_get_feature_indexes (hb_face_t *face,
|
|
hb_tag_t table_tag,
|
|
unsigned int script_index,
|
|
unsigned int language_index,
|
|
unsigned int start_offset,
|
|
unsigned int *feature_count /* IN/OUT */,
|
|
unsigned int *feature_indexes /* OUT */);
|
|
|
|
unsigned int
|
|
hb_ot_layout_language_get_feature_tags (hb_face_t *face,
|
|
hb_tag_t table_tag,
|
|
unsigned int script_index,
|
|
unsigned int language_index,
|
|
unsigned int start_offset,
|
|
unsigned int *feature_count /* IN/OUT */,
|
|
hb_tag_t *feature_tags /* OUT */);
|
|
|
|
hb_bool_t
|
|
hb_ot_layout_language_find_feature (hb_face_t *face,
|
|
hb_tag_t table_tag,
|
|
unsigned int script_index,
|
|
unsigned int language_index,
|
|
hb_tag_t feature_tag,
|
|
unsigned int *feature_index);
|
|
|
|
unsigned int
|
|
hb_ot_layout_feature_get_lookup_indexes (hb_face_t *face,
|
|
hb_tag_t table_tag,
|
|
unsigned int feature_index,
|
|
unsigned int start_offset,
|
|
unsigned int *lookup_count /* IN/OUT */,
|
|
unsigned int *lookup_indexes /* OUT */);
|
|
|
|
|
|
/*
|
|
* GSUB
|
|
*/
|
|
|
|
hb_bool_t
|
|
hb_ot_layout_has_substitution (hb_face_t *face);
|
|
|
|
/* Should be called before all the substitute_lookup's are done. */
|
|
void
|
|
hb_ot_layout_substitute_start (hb_buffer_t *buffer);
|
|
|
|
hb_bool_t
|
|
hb_ot_layout_substitute_lookup (hb_face_t *face,
|
|
hb_buffer_t *buffer,
|
|
unsigned int lookup_index,
|
|
hb_mask_t mask);
|
|
|
|
/* Should be called after all the substitute_lookup's are done */
|
|
void
|
|
hb_ot_layout_substitute_finish (hb_buffer_t *buffer);
|
|
|
|
/*
|
|
* GPOS
|
|
*/
|
|
|
|
hb_bool_t
|
|
hb_ot_layout_has_positioning (hb_face_t *face);
|
|
|
|
/* Should be called before all the position_lookup's are done. Resets positions to zero. */
|
|
void
|
|
hb_ot_layout_position_start (hb_buffer_t *buffer);
|
|
|
|
hb_bool_t
|
|
hb_ot_layout_position_lookup (hb_font_t *font,
|
|
hb_buffer_t *buffer,
|
|
unsigned int lookup_index,
|
|
hb_mask_t mask);
|
|
|
|
/* Should be called after all the position_lookup's are done */
|
|
void
|
|
hb_ot_layout_position_finish (hb_buffer_t *buffer);
|
|
|
|
|
|
HB_END_DECLS
|
|
|
|
#endif /* HB_OT_LAYOUT_H */
|