EVOLUTION-MANAGER

Edit File: hb-ot-layout.h

/* * 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_H_IN #error "Include <hb-ot.h> instead." #endif #ifndef HB_OT_LAYOUT_H #define HB_OT_LAYOUT_H #include "hb.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') #define HB_OT_TAG_JSTF HB_TAG('J','S','T','F') /* * GDEF */ HB_EXTERN hb_bool_t hb_ot_layout_has_glyph_classes (hb_face_t *face); typedef enum { HB_OT_LAYOUT_GLYPH_CLASS_UNCLASSIFIED = 0, HB_OT_LAYOUT_GLYPH_CLASS_BASE_GLYPH = 1, HB_OT_LAYOUT_GLYPH_CLASS_LIGATURE = 2, HB_OT_LAYOUT_GLYPH_CLASS_MARK = 3, HB_OT_LAYOUT_GLYPH_CLASS_COMPONENT = 4 } hb_ot_layout_glyph_class_t; HB_EXTERN hb_ot_layout_glyph_class_t hb_ot_layout_get_glyph_class (hb_face_t *face, hb_codepoint_t glyph); HB_EXTERN void hb_ot_layout_get_glyphs_in_class (hb_face_t *face, hb_ot_layout_glyph_class_t klass, hb_set_t *glyphs /* OUT */); /* Not that useful. Provides list of attach points for a glyph that a * client may want to cache */ HB_EXTERN 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 */ HB_EXTERN 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 0xFFFFu #define HB_OT_LAYOUT_NO_FEATURE_INDEX 0xFFFFu #define HB_OT_LAYOUT_DEFAULT_LANGUAGE_INDEX 0xFFFFu #define HB_OT_LAYOUT_NO_VARIATIONS_INDEX 0xFFFFFFFFu HB_EXTERN 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_EXTERN 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_EXTERN 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); HB_EXTERN 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 */); HB_EXTERN 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_EXTERN 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_EXTERN 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); HB_EXTERN hb_bool_t hb_ot_layout_language_get_required_feature (hb_face_t *face, hb_tag_t table_tag, unsigned int script_index, unsigned int language_index, unsigned int *feature_index, hb_tag_t *feature_tag); HB_EXTERN 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 */); HB_EXTERN 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_EXTERN 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); HB_EXTERN unsigned int hb_ot_layout_feature_get_lookups (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 */); HB_EXTERN unsigned int hb_ot_layout_table_get_lookup_count (hb_face_t *face, hb_tag_t table_tag); HB_EXTERN void hb_ot_layout_collect_lookups (hb_face_t *face, hb_tag_t table_tag, const hb_tag_t *scripts, const hb_tag_t *languages, const hb_tag_t *features, hb_set_t *lookup_indexes /* OUT */); HB_EXTERN void hb_ot_layout_lookup_collect_glyphs (hb_face_t *face, hb_tag_t table_tag, unsigned int lookup_index, hb_set_t *glyphs_before, /* OUT. May be NULL */ hb_set_t *glyphs_input, /* OUT. May be NULL */ hb_set_t *glyphs_after, /* OUT. May be NULL */ hb_set_t *glyphs_output /* OUT. May be NULL */); #ifdef HB_NOT_IMPLEMENTED typedef struct { const hb_codepoint_t *before, unsigned int before_length, const hb_codepoint_t *input, unsigned int input_length, const hb_codepoint_t *after, unsigned int after_length, } hb_ot_layout_glyph_sequence_t; typedef hb_bool_t (*hb_ot_layout_glyph_sequence_func_t) (hb_font_t *font, hb_tag_t table_tag, unsigned int lookup_index, const hb_ot_layout_glyph_sequence_t *sequence, void *user_data); HB_EXTERN void Xhb_ot_layout_lookup_enumerate_sequences (hb_face_t *face, hb_tag_t table_tag, unsigned int lookup_index, hb_ot_layout_glyph_sequence_func_t callback, void *user_data); #endif /* Variations support */ HB_EXTERN hb_bool_t hb_ot_layout_table_find_feature_variations (hb_face_t *face, hb_tag_t table_tag, const int *coords, unsigned int num_coords, unsigned int *variations_index /* out */); HB_EXTERN unsigned int hb_ot_layout_feature_with_variations_get_lookups (hb_face_t *face, hb_tag_t table_tag, unsigned int feature_index, unsigned int variations_index, unsigned int start_offset, unsigned int *lookup_count /* IN/OUT */, unsigned int *lookup_indexes /* OUT */); /* * GSUB */ HB_EXTERN hb_bool_t hb_ot_layout_has_substitution (hb_face_t *face); HB_EXTERN hb_bool_t hb_ot_layout_lookup_would_substitute (hb_face_t *face, unsigned int lookup_index, const hb_codepoint_t *glyphs, unsigned int glyphs_length, hb_bool_t zero_context); HB_EXTERN void hb_ot_layout_lookup_substitute_closure (hb_face_t *face, unsigned int lookup_index, hb_set_t *glyphs /*TODO , hb_bool_t inclusive */); #ifdef HB_NOT_IMPLEMENTED /* Note: You better have GDEF when using this API, or marks won't do much. */ HB_EXTERN hb_bool_t Xhb_ot_layout_lookup_substitute (hb_font_t *font, unsigned int lookup_index, const hb_ot_layout_glyph_sequence_t *sequence, unsigned int out_size, hb_codepoint_t *glyphs_out, /* OUT */ unsigned int *clusters_out, /* OUT */ unsigned int *out_length /* OUT */); #endif /* * GPOS */ HB_EXTERN hb_bool_t hb_ot_layout_has_positioning (hb_face_t *face); #ifdef HB_NOT_IMPLEMENTED /* Note: You better have GDEF when using this API, or marks won't do much. */ HB_EXTERN hb_bool_t Xhb_ot_layout_lookup_position (hb_font_t *font, unsigned int lookup_index, const hb_ot_layout_glyph_sequence_t *sequence, hb_glyph_position_t *positions /* IN / OUT */); #endif /* Optical 'size' feature info. Returns true if found. * http://www.microsoft.com/typography/otspec/features_pt.htm#size */ HB_EXTERN hb_bool_t hb_ot_layout_get_size_params (hb_face_t *face, unsigned int *design_size, /* OUT. May be NULL */ unsigned int *subfamily_id, /* OUT. May be NULL */ unsigned int *subfamily_name_id, /* OUT. May be NULL */ unsigned int *range_start, /* OUT. May be NULL */ unsigned int *range_end /* OUT. May be NULL */); HB_END_DECLS #endif /* HB_OT_LAYOUT_H */