/* * Copyright © 2009,2010 Red Hat, Inc. * Copyright © 2010,2011,2012 Google, 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 * Google Author(s): Behdad Esfahbod */ #include "hb.hh" #ifndef HB_NO_OT_SHAPE #ifdef HB_NO_OT_LAYOUT #error "Cannot compile 'ot' shaper with HB_NO_OT_LAYOUT." #endif #include "hb-shaper-impl.hh" #include "hb-ot-shape.hh" #include "hb-ot-shaper.hh" #include "hb-ot-shape-fallback.hh" #include "hb-ot-shape-normalize.hh" #include "hb-ot-face.hh" #include "hb-set.hh" #include "hb-aat-layout.hh" static inline bool _hb_codepoint_is_regional_indicator (hb_codepoint_t u) { … } #ifndef HB_NO_AAT_SHAPE static inline bool _hb_apply_morx (hb_face_t *face, const hb_segment_properties_t &props) { … } #endif /** * SECTION:hb-ot-shape * @title: hb-ot-shape * @short_description: OpenType shaping support * @include: hb-ot.h * * Support functions for OpenType shaping related queries. **/ static void hb_ot_shape_collect_features (hb_ot_shape_planner_t *planner, const hb_feature_t *user_features, unsigned int num_user_features); hb_ot_shape_planner_t::hb_ot_shape_planner_t (hb_face_t *face, const hb_segment_properties_t &props) : … { … } void hb_ot_shape_planner_t::compile (hb_ot_shape_plan_t &plan, const hb_ot_shape_plan_key_t &key) { … } bool hb_ot_shape_plan_t::init0 (hb_face_t *face, const hb_shape_plan_key_t *key) { … } void hb_ot_shape_plan_t::fini () { … } void hb_ot_shape_plan_t::substitute (hb_font_t *font, hb_buffer_t *buffer) const { … } void hb_ot_shape_plan_t::position (hb_font_t *font, hb_buffer_t *buffer) const { … } static const hb_ot_map_feature_t common_features[] = …; static const hb_ot_map_feature_t horizontal_features[] = …; static void hb_ot_shape_collect_features (hb_ot_shape_planner_t *planner, const hb_feature_t *user_features, unsigned int num_user_features) { … } /* * shaper face data */ struct hb_ot_face_data_t { … }; hb_ot_face_data_t * _hb_ot_shaper_face_data_create (hb_face_t *face) { … } void _hb_ot_shaper_face_data_destroy (hb_ot_face_data_t *data) { … } /* * shaper font data */ struct hb_ot_font_data_t { … }; hb_ot_font_data_t * _hb_ot_shaper_font_data_create (hb_font_t *font HB_UNUSED) { … } void _hb_ot_shaper_font_data_destroy (hb_ot_font_data_t *data HB_UNUSED) { … } /* * shaper */ struct hb_ot_shape_context_t { … }; /* Main shaper */ /* Prepare */ static void hb_set_unicode_props (hb_buffer_t *buffer) { … } static void hb_insert_dotted_circle (hb_buffer_t *buffer, hb_font_t *font) { … } static void hb_form_clusters (hb_buffer_t *buffer) { … } static void hb_ensure_native_direction (hb_buffer_t *buffer) { … } /* * Substitute */ #ifndef HB_NO_VERTICAL static hb_codepoint_t hb_vert_char_for (hb_codepoint_t u) { … } #endif static inline void hb_ot_rotate_chars (const hb_ot_shape_context_t *c) { … } static inline void hb_ot_shape_setup_masks_fraction (const hb_ot_shape_context_t *c) { … } static inline void hb_ot_shape_initialize_masks (const hb_ot_shape_context_t *c) { … } static inline void hb_ot_shape_setup_masks (const hb_ot_shape_context_t *c) { … } static void hb_ot_zero_width_default_ignorables (const hb_buffer_t *buffer) { … } static void hb_ot_deal_with_variation_selectors (hb_buffer_t *buffer) { … } static void hb_ot_hide_default_ignorables (hb_buffer_t *buffer, hb_font_t *font) { … } static inline void hb_ot_map_glyphs_fast (hb_buffer_t *buffer) { … } static inline void hb_synthesize_glyph_classes (hb_buffer_t *buffer) { … } static inline void hb_ot_substitute_default (const hb_ot_shape_context_t *c) { … } static inline void hb_ot_substitute_plan (const hb_ot_shape_context_t *c) { … } static inline void hb_ot_substitute_pre (const hb_ot_shape_context_t *c) { … } static inline void hb_ot_substitute_post (const hb_ot_shape_context_t *c) { … } /* * Position */ static inline void adjust_mark_offsets (hb_glyph_position_t *pos) { … } static inline void zero_mark_width (hb_glyph_position_t *pos) { … } static inline void zero_mark_widths_by_gdef (hb_buffer_t *buffer, bool adjust_offsets) { … } static inline void hb_ot_position_default (const hb_ot_shape_context_t *c) { … } static inline void hb_ot_position_plan (const hb_ot_shape_context_t *c) { … } static inline void hb_ot_position (const hb_ot_shape_context_t *c) { … } static inline void hb_propagate_flags (hb_buffer_t *buffer) { … } /* Pull it all together! */ static void hb_ot_shape_internal (hb_ot_shape_context_t *c) { … } hb_bool_t _hb_ot_shape (hb_shape_plan_t *shape_plan, hb_font_t *font, hb_buffer_t *buffer, const hb_feature_t *features, unsigned int num_features) { … } /** * hb_ot_shape_plan_collect_lookups: * @shape_plan: #hb_shape_plan_t to query * @table_tag: GSUB or GPOS * @lookup_indexes: (out): The #hb_set_t set of lookups returned * * Computes the complete set of GSUB or GPOS lookups that are applicable * under a given @shape_plan. * * Since: 0.9.7 **/ void hb_ot_shape_plan_collect_lookups (hb_shape_plan_t *shape_plan, hb_tag_t table_tag, hb_set_t *lookup_indexes /* OUT */) { … } /* TODO Move this to hb-ot-shape-normalize, make it do decompose, and make it public. */ static void add_char (hb_font_t *font, hb_unicode_funcs_t *unicode, hb_bool_t mirror, hb_codepoint_t u, hb_set_t *glyphs) { … } /** * hb_ot_shape_glyphs_closure: * @font: #hb_font_t to work upon * @buffer: The input buffer to compute from * @features: (array length=num_features): The features enabled on the buffer * @num_features: The number of features enabled on the buffer * @glyphs: (out): The #hb_set_t set of glyphs comprising the transitive closure of the query * * Computes the transitive closure of glyphs needed for a specified * input buffer under the given font and feature list. The closure is * computed as a set, not as a list. * * Since: 0.9.2 **/ void hb_ot_shape_glyphs_closure (hb_font_t *font, hb_buffer_t *buffer, const hb_feature_t *features, unsigned int num_features, hb_set_t *glyphs) { … } #endif
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