/gfx/harfbuzz/src/hb-ot-layout.h
C Header | 207 lines | 124 code | 38 blank | 45 comment | 0 complexity | 54ac7af813985f9c8134076106654edc MD5 | raw file
Possible License(s): MPL-2.0-no-copyleft-exception, LGPL-3.0, AGPL-1.0, LGPL-2.1, BSD-3-Clause, GPL-2.0, JSON, Apache-2.0, 0BSD
- /*
- * 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 */