summaryrefslogtreecommitdiff
path: root/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-subset-plan.cc
diff options
context:
space:
mode:
Diffstat (limited to 'Build/source/libs/harfbuzz/harfbuzz-src/src/hb-subset-plan.cc')
-rw-r--r--Build/source/libs/harfbuzz/harfbuzz-src/src/hb-subset-plan.cc395
1 files changed, 0 insertions, 395 deletions
diff --git a/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-subset-plan.cc b/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-subset-plan.cc
deleted file mode 100644
index 24beada3e8c..00000000000
--- a/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-subset-plan.cc
+++ /dev/null
@@ -1,395 +0,0 @@
-/*
- * Copyright © 2018 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.
- *
- * Google Author(s): Garret Rieger, Roderick Sheeter
- */
-
-#include "hb-subset-plan.hh"
-#include "hb-map.hh"
-#include "hb-set.hh"
-
-#include "hb-ot-cmap-table.hh"
-#include "hb-ot-glyf-table.hh"
-#include "hb-ot-layout-gdef-table.hh"
-#include "hb-ot-layout-gpos-table.hh"
-#include "hb-ot-layout-gsub-table.hh"
-#include "hb-ot-cff1-table.hh"
-#include "hb-ot-color-colr-table.hh"
-#include "hb-ot-var-fvar-table.hh"
-#include "hb-ot-stat-table.hh"
-
-
-#ifndef HB_NO_SUBSET_CFF
-static inline void
-_add_cff_seac_components (const OT::cff1::accelerator_t &cff,
- hb_codepoint_t gid,
- hb_set_t *gids_to_retain)
-{
- hb_codepoint_t base_gid, accent_gid;
- if (cff.get_seac_components (gid, &base_gid, &accent_gid))
- {
- gids_to_retain->add (base_gid);
- gids_to_retain->add (accent_gid);
- }
-}
-#endif
-
-#ifndef HB_NO_SUBSET_LAYOUT
-static void
-_remap_indexes (const hb_set_t *indexes,
- hb_map_t *mapping /* OUT */)
-{
- unsigned count = indexes->get_population ();
-
- for (auto _ : + hb_zip (indexes->iter (), hb_range (count)))
- mapping->set (_.first, _.second);
-
-}
-
-static inline void
-_gsub_closure_glyphs_lookups_features (hb_face_t *face,
- hb_set_t *gids_to_retain,
- hb_map_t *gsub_lookups,
- hb_map_t *gsub_features)
-{
- hb_set_t lookup_indices;
- hb_ot_layout_collect_lookups (face,
- HB_OT_TAG_GSUB,
- nullptr,
- nullptr,
- nullptr,
- &lookup_indices);
- hb_ot_layout_lookups_substitute_closure (face,
- &lookup_indices,
- gids_to_retain);
- hb_blob_ptr_t<OT::GSUB> gsub = hb_sanitize_context_t ().reference_table<OT::GSUB> (face);
- gsub->closure_lookups (face,
- gids_to_retain,
- &lookup_indices);
- _remap_indexes (&lookup_indices, gsub_lookups);
-
- //closure features
- hb_set_t feature_indices;
- gsub->closure_features (gsub_lookups, &feature_indices);
- _remap_indexes (&feature_indices, gsub_features);
- gsub.destroy ();
-}
-
-static inline void
-_gpos_closure_lookups_features (hb_face_t *face,
- const hb_set_t *gids_to_retain,
- hb_map_t *gpos_lookups,
- hb_map_t *gpos_features)
-{
- hb_set_t lookup_indices;
- hb_ot_layout_collect_lookups (face,
- HB_OT_TAG_GPOS,
- nullptr,
- nullptr,
- nullptr,
- &lookup_indices);
- hb_blob_ptr_t<OT::GPOS> gpos = hb_sanitize_context_t ().reference_table<OT::GPOS> (face);
- gpos->closure_lookups (face,
- gids_to_retain,
- &lookup_indices);
- _remap_indexes (&lookup_indices, gpos_lookups);
-
- //closure features
- hb_set_t feature_indices;
- gpos->closure_features (gpos_lookups, &feature_indices);
- _remap_indexes (&feature_indices, gpos_features);
- gpos.destroy ();
-}
-#endif
-
-#ifndef HB_NO_VAR
-static inline void
- _collect_layout_variation_indices (hb_face_t *face,
- const hb_set_t *glyphset,
- const hb_map_t *gpos_lookups,
- hb_set_t *layout_variation_indices,
- hb_map_t *layout_variation_idx_map)
-{
- hb_blob_ptr_t<OT::GDEF> gdef = hb_sanitize_context_t ().reference_table<OT::GDEF> (face);
- hb_blob_ptr_t<OT::GPOS> gpos = hb_sanitize_context_t ().reference_table<OT::GPOS> (face);
-
- if (!gdef->has_data ())
- {
- gdef.destroy ();
- gpos.destroy ();
- return;
- }
- OT::hb_collect_variation_indices_context_t c (layout_variation_indices, glyphset, gpos_lookups);
- gdef->collect_variation_indices (&c);
-
- if (hb_ot_layout_has_positioning (face))
- gpos->collect_variation_indices (&c);
-
- gdef->remap_layout_variation_indices (layout_variation_indices, layout_variation_idx_map);
-
- gdef.destroy ();
- gpos.destroy ();
-}
-#endif
-
-static inline void
-_cmap_closure (hb_face_t *face,
- const hb_set_t *unicodes,
- hb_set_t *glyphset)
-{
- OT::cmap::accelerator_t cmap;
- cmap.init (face);
- cmap.table->closure_glyphs (unicodes, glyphset);
- cmap.fini ();
-}
-
-static inline void
-_remove_invalid_gids (hb_set_t *glyphs,
- unsigned int num_glyphs)
-{
- hb_codepoint_t gid = HB_SET_VALUE_INVALID;
- while (glyphs->next (&gid))
- {
- if (gid >= num_glyphs)
- glyphs->del (gid);
- }
-}
-
-static void
-_populate_gids_to_retain (hb_subset_plan_t* plan,
- const hb_set_t *unicodes,
- const hb_set_t *input_glyphs_to_retain,
- bool close_over_gsub,
- bool close_over_gpos,
- bool close_over_gdef)
-{
- OT::cmap::accelerator_t cmap;
- OT::glyf::accelerator_t glyf;
-#ifndef HB_NO_SUBSET_CFF
- OT::cff1::accelerator_t cff;
-#endif
- OT::COLR::accelerator_t colr;
- cmap.init (plan->source);
- glyf.init (plan->source);
-#ifndef HB_NO_SUBSET_CFF
- cff.init (plan->source);
-#endif
- colr.init (plan->source);
-
- plan->_glyphset_gsub->add (0); // Not-def
- hb_set_union (plan->_glyphset_gsub, input_glyphs_to_retain);
-
- hb_codepoint_t cp = HB_SET_VALUE_INVALID;
- while (unicodes->next (&cp))
- {
- hb_codepoint_t gid;
- if (!cmap.get_nominal_glyph (cp, &gid))
- {
- DEBUG_MSG(SUBSET, nullptr, "Drop U+%04X; no gid", cp);
- continue;
- }
- plan->unicodes->add (cp);
- plan->codepoint_to_glyph->set (cp, gid);
- plan->_glyphset_gsub->add (gid);
- }
-
- _cmap_closure (plan->source, plan->unicodes, plan->_glyphset_gsub);
-
-#ifndef HB_NO_SUBSET_LAYOUT
- if (close_over_gsub)
- // closure all glyphs/lookups/features needed for GSUB substitutions.
- _gsub_closure_glyphs_lookups_features (plan->source, plan->_glyphset_gsub, plan->gsub_lookups, plan->gsub_features);
-
- if (close_over_gpos)
- _gpos_closure_lookups_features (plan->source, plan->_glyphset_gsub, plan->gpos_lookups, plan->gpos_features);
-#endif
- _remove_invalid_gids (plan->_glyphset_gsub, plan->source->get_num_glyphs ());
-
- // Populate a full set of glyphs to retain by adding all referenced
- // composite glyphs.
- hb_codepoint_t gid = HB_SET_VALUE_INVALID;
- while (plan->_glyphset_gsub->next (&gid))
- {
- glyf.add_gid_and_children (gid, plan->_glyphset);
-#ifndef HB_NO_SUBSET_CFF
- if (cff.is_valid ())
- _add_cff_seac_components (cff, gid, plan->_glyphset);
-#endif
- if (colr.is_valid ())
- colr.closure_glyphs (gid, plan->_glyphset);
- }
-
- _remove_invalid_gids (plan->_glyphset, plan->source->get_num_glyphs ());
-
-#ifndef HB_NO_VAR
- if (close_over_gdef)
- _collect_layout_variation_indices (plan->source, plan->_glyphset, plan->gpos_lookups, plan->layout_variation_indices, plan->layout_variation_idx_map);
-#endif
-
-#ifndef HB_NO_SUBSET_CFF
- cff.fini ();
-#endif
- glyf.fini ();
- cmap.fini ();
-}
-
-static void
-_create_old_gid_to_new_gid_map (const hb_face_t *face,
- bool retain_gids,
- const hb_set_t *all_gids_to_retain,
- hb_map_t *glyph_map, /* OUT */
- hb_map_t *reverse_glyph_map, /* OUT */
- unsigned int *num_glyphs /* OUT */)
-{
- if (!retain_gids)
- {
- + hb_enumerate (hb_iter (all_gids_to_retain), (hb_codepoint_t) 0)
- | hb_sink (reverse_glyph_map)
- ;
- *num_glyphs = reverse_glyph_map->get_population ();
- } else {
- + hb_iter (all_gids_to_retain)
- | hb_map ([] (hb_codepoint_t _) {
- return hb_pair_t<hb_codepoint_t, hb_codepoint_t> (_, _);
- })
- | hb_sink (reverse_glyph_map)
- ;
-
- unsigned max_glyph =
- + hb_iter (all_gids_to_retain)
- | hb_reduce (hb_max, 0u)
- ;
- *num_glyphs = max_glyph + 1;
- }
-
- + reverse_glyph_map->iter ()
- | hb_map (&hb_pair_t<hb_codepoint_t, hb_codepoint_t>::reverse)
- | hb_sink (glyph_map)
- ;
-}
-
-static void
-_nameid_closure (hb_face_t *face,
- hb_set_t *nameids)
-{
-#ifndef HB_NO_STYLE
- face->table.STAT->collect_name_ids (nameids);
-#endif
-#ifndef HB_NO_VAR
- face->table.fvar->collect_name_ids (nameids);
-#endif
-}
-
-/**
- * hb_subset_plan_create:
- * Computes a plan for subsetting the supplied face according
- * to a provided input. The plan describes
- * which tables and glyphs should be retained.
- *
- * Return value: New subset plan.
- *
- * Since: 1.7.5
- **/
-hb_subset_plan_t *
-hb_subset_plan_create (hb_face_t *face,
- hb_subset_input_t *input)
-{
- hb_subset_plan_t *plan;
- if (unlikely (!(plan = hb_object_create<hb_subset_plan_t> ())))
- return const_cast<hb_subset_plan_t *> (&Null (hb_subset_plan_t));
-
- plan->successful = true;
- plan->drop_hints = input->drop_hints;
- plan->desubroutinize = input->desubroutinize;
- plan->retain_gids = input->retain_gids;
- plan->name_legacy = input->name_legacy;
- plan->unicodes = hb_set_create ();
- plan->name_ids = hb_set_reference (input->name_ids);
- _nameid_closure (face, plan->name_ids);
- plan->name_languages = hb_set_reference (input->name_languages);
- plan->glyphs_requested = hb_set_reference (input->glyphs);
- plan->drop_tables = hb_set_reference (input->drop_tables);
- plan->source = hb_face_reference (face);
- plan->dest = hb_face_builder_create ();
-
- plan->_glyphset = hb_set_create ();
- plan->_glyphset_gsub = hb_set_create ();
- plan->codepoint_to_glyph = hb_map_create ();
- plan->glyph_map = hb_map_create ();
- plan->reverse_glyph_map = hb_map_create ();
- plan->gsub_lookups = hb_map_create ();
- plan->gpos_lookups = hb_map_create ();
- plan->gsub_features = hb_map_create ();
- plan->gpos_features = hb_map_create ();
- plan->layout_variation_indices = hb_set_create ();
- plan->layout_variation_idx_map = hb_map_create ();
-
- _populate_gids_to_retain (plan,
- input->unicodes,
- input->glyphs,
- !input->drop_tables->has (HB_OT_TAG_GSUB),
- !input->drop_tables->has (HB_OT_TAG_GPOS),
- !input->drop_tables->has (HB_OT_TAG_GDEF));
-
- _create_old_gid_to_new_gid_map (face,
- input->retain_gids,
- plan->_glyphset,
- plan->glyph_map,
- plan->reverse_glyph_map,
- &plan->_num_output_glyphs);
-
- return plan;
-}
-
-/**
- * hb_subset_plan_destroy:
- *
- * Since: 1.7.5
- **/
-void
-hb_subset_plan_destroy (hb_subset_plan_t *plan)
-{
- if (!hb_object_destroy (plan)) return;
-
- hb_set_destroy (plan->unicodes);
- hb_set_destroy (plan->name_ids);
- hb_set_destroy (plan->name_languages);
- hb_set_destroy (plan->glyphs_requested);
- hb_set_destroy (plan->drop_tables);
- hb_face_destroy (plan->source);
- hb_face_destroy (plan->dest);
- hb_map_destroy (plan->codepoint_to_glyph);
- hb_map_destroy (plan->glyph_map);
- hb_map_destroy (plan->reverse_glyph_map);
- hb_set_destroy (plan->_glyphset);
- hb_set_destroy (plan->_glyphset_gsub);
- hb_map_destroy (plan->gsub_lookups);
- hb_map_destroy (plan->gpos_lookups);
- hb_map_destroy (plan->gsub_features);
- hb_map_destroy (plan->gpos_features);
- hb_set_destroy (plan->layout_variation_indices);
- hb_map_destroy (plan->layout_variation_idx_map);
-
-
- free (plan);
-}