Vertex and attribute compression to reduce the size of the vertex format.

This allows Godot to automatically compress meshes to save a lot of bandwidth.

In general, this requires no interaction from the user and should result in
no noticable quality loss.

This scheme is not backwards compatible, so we have provided an upgrade
mechanism, and a mesh versioning mechanism.

Existing meshes can still be used as a result, but users can get a
performance boost by reimporting assets.

1 files changed, 8 insertions, 3 deletions

diff --git a/scene/resources/mesh_data_tool.h b/scene/resources/mesh_data_tool.h
index 2912d47416..36311cfefc 100644
--- a/scene/resources/mesh_data_tool.h
+++ b/scene/resources/mesh_data_tool.h
@@ -36,7 +36,7 @@
 class MeshDataTool : public RefCounted {
 	GDCLASS(MeshDataTool, RefCounted);
 
-	int format = 0;
+	uint64_t format = 0;
 	struct Vertex {
 		Vector3 vertex;
 		Color color;
@@ -74,12 +74,17 @@ class MeshDataTool : public RefCounted {
 protected:
 	static void _bind_methods();
 
+#ifndef DISABLE_DEPRECATED
+	Error commit_to_surface_bind_compat_81138(const Ref<ArrayMesh> &p_mesh);
+	static void _bind_compatibility_methods();
+#endif
+
 public:
 	void clear();
 	Error create_from_surface(const Ref<ArrayMesh> &p_mesh, int p_surface);
-	Error commit_to_surface(const Ref<ArrayMesh> &p_mesh);
+	Error commit_to_surface(const Ref<ArrayMesh> &p_mesh, uint64_t p_compression_flags = 0);
 
-	int get_format() const;
+	uint64_t get_format() const;
 
 	int get_vertex_count() const;
 	int get_edge_count() const;