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Diffstat (limited to 'src/mbgl/programs/segment.hpp')
| -rw-r--r-- | src/mbgl/programs/segment.hpp | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/src/mbgl/programs/segment.hpp b/src/mbgl/programs/segment.hpp index d8cc9679d7..74bf4a75c5 100644 --- a/src/mbgl/programs/segment.hpp +++ b/src/mbgl/programs/segment.hpp @@ -28,7 +28,14 @@ public: std::size_t vertexLength; std::size_t indexLength; - mutable optional<gl::VertexArray> vertexArray; + // One VertexArray per layer ID. This minimizes rebinding in cases where + // several layers share buckets but have different sets of active attributes. + // This can happen: + // * when two layers have the same layout properties, but differing + // data-driven paint properties + // * when two fill layers have the same layout properties, but one + // uses fill-color and the other uses fill-pattern + mutable std::map<std::string, optional<gl::VertexArray>> vertexArrays; }; template <class Attributes> |