diff options
Diffstat (limited to 'src/3rdparty/harfbuzz-ng/src/hb-ot-color-colr-table.hh')
| -rw-r--r-- | src/3rdparty/harfbuzz-ng/src/hb-ot-color-colr-table.hh | 142 |
1 files changed, 141 insertions, 1 deletions
diff --git a/src/3rdparty/harfbuzz-ng/src/hb-ot-color-colr-table.hh b/src/3rdparty/harfbuzz-ng/src/hb-ot-color-colr-table.hh index e2ed7c6549..e2a1ff4662 100644 --- a/src/3rdparty/harfbuzz-ng/src/hb-ot-color-colr-table.hh +++ b/src/3rdparty/harfbuzz-ng/src/hb-ot-color-colr-table.hh @@ -1,5 +1,6 @@ /* * Copyright © 2018 Ebrahim Byagowi + * Copyright © 2020 Google, Inc. * * This is part of HarfBuzz, a text shaping library. * @@ -20,6 +21,8 @@ * 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): Calder Kitagawa */ #ifndef HB_OT_COLOR_COLR_TABLE_HH @@ -47,7 +50,7 @@ struct LayerRecord return_trace (c->check_struct (this)); } - protected: + public: HBGlyphID glyphId; /* Glyph ID of layer glyph */ Index colorIdx; /* Index value to use with a * selected color palette. @@ -112,6 +115,38 @@ struct COLR return glyph_layers.length; } + struct accelerator_t + { + accelerator_t () {} + ~accelerator_t () { fini (); } + + void init (hb_face_t *face) + { colr = hb_sanitize_context_t ().reference_table<COLR> (face); } + + void fini () { this->colr.destroy (); } + + bool is_valid () { return colr.get_blob ()->length; } + + void closure_glyphs (hb_codepoint_t glyph, + hb_set_t *related_ids /* OUT */) const + { colr->closure_glyphs (glyph, related_ids); } + + private: + hb_blob_ptr_t<COLR> colr; + }; + + void closure_glyphs (hb_codepoint_t glyph, + hb_set_t *related_ids /* OUT */) const + { + const BaseGlyphRecord *record = get_base_glyph_record (glyph); + if (!record) return; + + auto glyph_layers = (this+layersZ).as_array (numLayers).sub_array (record->firstLayerIdx, + record->numLayers); + if (!glyph_layers.length) return; + related_ids->add_array (&glyph_layers[0].glyphId, glyph_layers.length, LayerRecord::min_size); + } + bool sanitize (hb_sanitize_context_t *c) const { TRACE_SANITIZE (this); @@ -120,6 +155,111 @@ struct COLR (this+layersZ).sanitize (c, numLayers))); } + template<typename BaseIterator, typename LayerIterator, + hb_requires (hb_is_iterator (BaseIterator)), + hb_requires (hb_is_iterator (LayerIterator))> + bool serialize (hb_serialize_context_t *c, + unsigned version, + BaseIterator base_it, + LayerIterator layer_it) + { + TRACE_SERIALIZE (this); + if (unlikely (base_it.len () != layer_it.len ())) + return_trace (false); + + if (unlikely (!c->extend_min (this))) return_trace (false); + this->version = version; + numLayers = 0; + numBaseGlyphs = base_it.len (); + baseGlyphsZ = COLR::min_size; + layersZ = COLR::min_size + numBaseGlyphs * BaseGlyphRecord::min_size; + + for (const hb_item_type<BaseIterator> _ : + base_it.iter ()) + { + auto* record = c->embed (_); + if (unlikely (!record)) return_trace (false); + record->firstLayerIdx = numLayers; + numLayers += record->numLayers; + } + + for (const hb_item_type<LayerIterator>& _ : + layer_it.iter ()) + _.as_array ().copy (c); + + return_trace (true); + } + + const BaseGlyphRecord* get_base_glyph_record (hb_codepoint_t gid) const + { + if ((unsigned int) gid == 0) // Ignore notdef. + return nullptr; + const BaseGlyphRecord* record = &(this+baseGlyphsZ).bsearch (numBaseGlyphs, (unsigned int) gid); + if ((record && (hb_codepoint_t) record->glyphId != gid)) + record = nullptr; + return record; + } + + bool subset (hb_subset_context_t *c) const + { + TRACE_SUBSET (this); + + const hb_map_t &reverse_glyph_map = *c->plan->reverse_glyph_map; + + auto base_it = + + hb_range (c->plan->num_output_glyphs ()) + | hb_map_retains_sorting ([&](hb_codepoint_t new_gid) + { + hb_codepoint_t old_gid = reverse_glyph_map.get (new_gid); + + const BaseGlyphRecord* old_record = get_base_glyph_record (old_gid); + if (unlikely (!old_record)) + return hb_pair_t<bool, BaseGlyphRecord> (false, Null (BaseGlyphRecord)); + + BaseGlyphRecord new_record = {}; + new_record.glyphId = new_gid; + new_record.numLayers = old_record->numLayers; + return hb_pair_t<bool, BaseGlyphRecord> (true, new_record); + }) + | hb_filter (hb_first) + | hb_map_retains_sorting (hb_second) + ; + + auto layer_it = + + hb_range (c->plan->num_output_glyphs ()) + | hb_map (reverse_glyph_map) + | hb_map_retains_sorting ([&](hb_codepoint_t old_gid) + { + const BaseGlyphRecord* old_record = get_base_glyph_record (old_gid); + hb_vector_t<LayerRecord> out_layers; + + if (unlikely (!old_record || + old_record->firstLayerIdx >= numLayers || + old_record->firstLayerIdx + old_record->numLayers > numLayers)) + return hb_pair_t<bool, hb_vector_t<LayerRecord>> (false, out_layers); + + auto layers = (this+layersZ).as_array (numLayers).sub_array (old_record->firstLayerIdx, + old_record->numLayers); + out_layers.resize (layers.length); + for (unsigned int i = 0; i < layers.length; i++) { + out_layers[i] = layers[i]; + hb_codepoint_t new_gid = 0; + if (unlikely (!c->plan->new_gid_for_old_gid (out_layers[i].glyphId, &new_gid))) + return hb_pair_t<bool, hb_vector_t<LayerRecord>> (false, out_layers); + out_layers[i].glyphId = new_gid; + } + + return hb_pair_t<bool, hb_vector_t<LayerRecord>> (true, out_layers); + }) + | hb_filter (hb_first) + | hb_map_retains_sorting (hb_second) + ; + + if (unlikely (!base_it || !layer_it || base_it.len () != layer_it.len ())) + return_trace (false); + + COLR *colr_prime = c->serializer->start_embed<COLR> (); + return_trace (colr_prime->serialize (c->serializer, version, base_it, layer_it)); + } + protected: HBUINT16 version; /* Table version number (starts at 0). */ HBUINT16 numBaseGlyphs; /* Number of Base Glyph Records. */ |