/gfx/harfbuzz/src/hb-ot-map-private.hh
C++ Header | 191 lines | 119 code | 45 blank | 27 comment | 2 complexity | 5f393bf5f0e0f11f5e61faa5e3043144 MD5 | raw file
Possible License(s): GPL-2.0, JSON, 0BSD, LGPL-3.0, AGPL-1.0, MIT, MPL-2.0-no-copyleft-exception, BSD-3-Clause, LGPL-2.1, Apache-2.0
- /*
- * Copyright © 2009,2010 Red Hat, Inc.
- * Copyright © 2010,2011 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
- */
- #ifndef HB_OT_MAP_PRIVATE_HH
- #define HB_OT_MAP_PRIVATE_HH
- #include "hb-buffer-private.hh"
- #include "hb-ot-layout.h"
- static const hb_tag_t table_tags[2] = {HB_OT_TAG_GSUB, HB_OT_TAG_GPOS};
- struct hb_ot_map_t
- {
- friend struct hb_ot_map_builder_t;
- public:
- hb_ot_map_t (void) { memset (this, 0, sizeof (*this)); }
- typedef void (*gsub_pause_func_t) (const hb_ot_map_t *map, hb_face_t *face, hb_buffer_t *buffer, void *user_data);
- typedef void (*gpos_pause_func_t) (const hb_ot_map_t *map, hb_font_t *font, hb_buffer_t *buffer, void *user_data);
- inline hb_mask_t get_global_mask (void) const { return global_mask; }
- inline hb_mask_t get_mask (hb_tag_t tag, unsigned int *shift = NULL) const {
- const feature_map_t *map = features.bsearch (&tag);
- if (shift) *shift = map ? map->shift : 0;
- return map ? map->mask : 0;
- }
- inline hb_mask_t get_1_mask (hb_tag_t tag) const {
- const feature_map_t *map = features.bsearch (&tag);
- return map ? map->_1_mask : 0;
- }
- inline hb_tag_t get_chosen_script (unsigned int table_index) const
- { return chosen_script[table_index]; }
- inline void substitute (hb_face_t *face, hb_buffer_t *buffer) const
- { apply (0, (hb_ot_map_t::apply_lookup_func_t) hb_ot_layout_substitute_lookup, face, buffer); }
- inline void position (hb_font_t *font, hb_buffer_t *buffer) const
- { apply (1, (hb_ot_map_t::apply_lookup_func_t) hb_ot_layout_position_lookup, font, buffer); }
- inline void finish (void) {
- features.finish ();
- lookups[0].finish ();
- lookups[1].finish ();
- pauses[0].finish ();
- pauses[1].finish ();
- }
- private:
- struct feature_map_t {
- hb_tag_t tag; /* should be first for our bsearch to work */
- unsigned int index[2]; /* GSUB/GPOS */
- unsigned int stage[2]; /* GSUB/GPOS */
- unsigned int shift;
- hb_mask_t mask;
- hb_mask_t _1_mask; /* mask for value=1, for quick access */
- static int cmp (const feature_map_t *a, const feature_map_t *b)
- { return a->tag < b->tag ? -1 : a->tag > b->tag ? 1 : 0; }
- };
- struct lookup_map_t {
- unsigned int index;
- hb_mask_t mask;
- static int cmp (const lookup_map_t *a, const lookup_map_t *b)
- { return a->index < b->index ? -1 : a->index > b->index ? 1 : 0; }
- };
- typedef void (*pause_func_t) (const hb_ot_map_t *map, void *face_or_font, hb_buffer_t *buffer, void *user_data);
- typedef struct {
- pause_func_t func;
- void *user_data;
- } pause_callback_t;
- struct pause_map_t {
- unsigned int num_lookups; /* Cumulative */
- pause_callback_t callback;
- };
- typedef hb_bool_t (*apply_lookup_func_t) (void *face_or_font,
- hb_buffer_t *buffer,
- unsigned int lookup_index,
- hb_mask_t mask);
- HB_INTERNAL void add_lookups (hb_face_t *face,
- unsigned int table_index,
- unsigned int feature_index,
- hb_mask_t mask);
- HB_INTERNAL void apply (unsigned int table_index,
- hb_ot_map_t::apply_lookup_func_t apply_lookup_func,
- void *face_or_font,
- hb_buffer_t *buffer) const;
- hb_mask_t global_mask;
- hb_tag_t chosen_script[2];
- hb_prealloced_array_t<feature_map_t, 8> features;
- hb_prealloced_array_t<lookup_map_t, 32> lookups[2]; /* GSUB/GPOS */
- hb_prealloced_array_t<pause_map_t, 1> pauses[2]; /* GSUB/GPOS */
- };
- struct hb_ot_map_builder_t
- {
- public:
- hb_ot_map_builder_t (void) { memset (this, 0, sizeof (*this)); }
- HB_INTERNAL void add_feature (hb_tag_t tag, unsigned int value, bool global);
- inline void add_bool_feature (hb_tag_t tag, bool global = true)
- { add_feature (tag, 1, global); }
- inline void add_gsub_pause (hb_ot_map_t::gsub_pause_func_t pause_func, void *user_data)
- { add_pause (0, (hb_ot_map_t::pause_func_t) pause_func, user_data); }
- inline void add_gpos_pause (hb_ot_map_t::gpos_pause_func_t pause_func, void *user_data)
- { add_pause (1, (hb_ot_map_t::pause_func_t) pause_func, user_data); }
- HB_INTERNAL void compile (hb_face_t *face,
- const hb_segment_properties_t *props,
- struct hb_ot_map_t &m);
- inline void finish (void) {
- feature_infos.finish ();
- pauses[0].finish ();
- pauses[1].finish ();
- }
- private:
- struct feature_info_t {
- hb_tag_t tag;
- unsigned int seq; /* sequence#, used for stable sorting only */
- unsigned int max_value;
- bool global; /* whether the feature applies value to every glyph in the buffer */
- unsigned int default_value; /* for non-global features, what should the unset glyphs take */
- unsigned int stage[2]; /* GSUB/GPOS */
- static int cmp (const feature_info_t *a, const feature_info_t *b)
- { return (a->tag != b->tag) ? (a->tag < b->tag ? -1 : 1) : (a->seq < b->seq ? -1 : 1); }
- };
- struct pause_info_t {
- unsigned int stage;
- hb_ot_map_t::pause_callback_t callback;
- };
- HB_INTERNAL void add_pause (unsigned int table_index, hb_ot_map_t::pause_func_t pause_func, void *user_data);
- unsigned int current_stage[2]; /* GSUB/GPOS */
- hb_prealloced_array_t<feature_info_t,16> feature_infos;
- hb_prealloced_array_t<pause_info_t, 1> pauses[2]; /* GSUB/GPOS */
- };
- #endif /* HB_OT_MAP_PRIVATE_HH */