diff options
Diffstat (limited to 'third_party/harfbuzz-ng/src/hb-ot-layout.h')
| -rw-r--r-- | third_party/harfbuzz-ng/src/hb-ot-layout.h | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/third_party/harfbuzz-ng/src/hb-ot-layout.h b/third_party/harfbuzz-ng/src/hb-ot-layout.h new file mode 100644 index 0000000..9619eb7 --- /dev/null +++ b/third_party/harfbuzz-ng/src/hb-ot-layout.h @@ -0,0 +1,196 @@ +/* + * Copyright (C) 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_face_t *face, + hb_direction_t direction, + hb_codepoint_t glyph, + unsigned int start_offset, + unsigned int *caret_count /* IN/OUT */, + int *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); + +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); + +hb_bool_t +hb_ot_layout_substitute_lookup (hb_face_t *face, + hb_buffer_t *buffer, + unsigned int lookup_index, + hb_mask_t mask); + +/* + * GPOS + */ + +hb_bool_t +hb_ot_layout_has_positioning (hb_face_t *face); + +hb_bool_t +hb_ot_layout_position_lookup (hb_font_t *font, + hb_face_t *face, + 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 */ |