[core] De-mutex GlyphAtlas and SpriteAtlas

 - Expose glyph and icon information to workers via message interface.
 - Glyph/SpriteAtlas track which tiles have outstanding requests
    and send messages to them when glyphs/icons become available.
 - Remove obsolete "updateSymbolDependentTiles" pathway
 - Symbol preparation for a tile now depends on all glyphs becoming
    available before it can start.
 - Start tracking individual icons needed for a tile, although we don't
    do anything with the information yet.
 - Introduce typedef for GlyphID

1 files changed, 6 insertions, 2 deletions

diff --git a/src/mbgl/style/layers/symbol_layer_impl.cpp b/src/mbgl/style/layers/symbol_layer_impl.cpp
index e4557c953f..c637770c04 100644
--- a/src/mbgl/style/layers/symbol_layer_impl.cpp
+++ b/src/mbgl/style/layers/symbol_layer_impl.cpp
@@ -36,11 +36,15 @@ std::unique_ptr<Bucket> SymbolLayer::Impl::createBucket(const BucketParameters&,
 
 std::unique_ptr<SymbolLayout> SymbolLayer::Impl::createLayout(const BucketParameters& parameters,
                                                               const std::vector<const Layer*>& group,
-                                                              const GeometryTileLayer& layer) const {
+                                                              const GeometryTileLayer& layer,
+                                                              GlyphDependencies& glyphDependencies,
+                                                              IconDependencyMap& iconDependencyMap) const {
     return std::make_unique<SymbolLayout>(parameters,
                                           group,
                                           layer,
-                                          *spriteAtlas);
+                                          iconDependencyMap[spriteAtlas],
+                                          (uintptr_t)spriteAtlas,
+                                          glyphDependencies);
 }
 
 IconPaintProperties::Evaluated SymbolLayer::Impl::iconPaintProperties() const {