/*
* Copyright © 2018 Ebrahim Byagowi
+ * Copyright © 2020 Google, Inc.
*
* This is part of HarfBuzz, a text shaping library.
*
* 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
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.
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);
(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. */
projects / platform / upstream / harfbuzz.git / blobdiff