Add ability for RenderManager to release not recently used geometry.

To keep our buffer usage down.
rednimgames · Jan 2, 2025 · 9cc16a9 · 9cc16a9
1 parent 05542d6
commit 9cc16a9
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Showing 2 changed files with 22 additions and 0 deletions.
diff --git a/Include/RmlUi/Core/RenderManager.h b/Include/RmlUi/Core/RenderManager.h
@@ -76,6 +76,9 @@ class RMLUICORE_API RenderManager : NonCopyMoveable {
 	RenderManager(RenderInterface* render_interface);
 	~RenderManager();
 
+	void StartFrame();
+	void ReleaseOldCompiledGeometry();
+
 	void PrepareRender();
 	void SetViewport(Vector2i dimensions);
 	Vector2i GetViewport() const;
@@ -135,6 +138,7 @@ class RMLUICORE_API RenderManager : NonCopyMoveable {
 	struct GeometryData {
 		Mesh mesh;
 		CompiledGeometryHandle handle = {};
+		uint32_t last_used_frame_id = 0;
 	};
 
 	RenderInterface* render_interface = nullptr;
@@ -144,6 +148,7 @@ class RMLUICORE_API RenderManager : NonCopyMoveable {
 
 	int compiled_filter_count = 0;
 	int compiled_shader_count = 0;
+	uint32_t frame_id = 0;
 
 	RenderState state;
 	Vector2i viewport_dimensions;

diff --git a/Source/Core/RenderManager.cpp b/Source/Core/RenderManager.cpp
@@ -217,6 +217,11 @@ StableVectorIndex RenderManager::InsertGeometry(Mesh&& mesh)
 	return geometry_list.insert(GeometryData{std::move(mesh), CompiledGeometryHandle{}});
 }
 
+void RenderManager::StartFrame()
+{
+	frame_id++;
+}
+
 CompiledGeometryHandle RenderManager::GetCompiledGeometryHandle(StableVectorIndex index)
 {
 	if (index == StableVectorIndex::Invalid)
@@ -230,6 +235,7 @@ CompiledGeometryHandle RenderManager::GetCompiledGeometryHandle(StableVectorInde
 		if (!geometry.handle)
 			Log::Message(Log::LT_ERROR, "Got empty compiled geometry.");
 	}
+	geometry.last_used_frame_id = frame_id;
 	return geometry.handle;
 }
 
@@ -284,6 +290,17 @@ void RenderManager::ReleaseAllCompiledGeometry()
 	});
 }
 
+void RenderManager::ReleaseOldCompiledGeometry()
+{
+	geometry_list.for_each([this](GeometryData& data) {
+		if (data.handle && (frame_id - data.last_used_frame_id) > 5)
+		{
+			render_interface->ReleaseGeometry(data.handle);
+			data.handle = {};
+		}
+	});
+}
+
 CompiledFilter RenderManager::CompileFilter(const String& name, const Dictionary& parameters)
 {
 	if (CompiledFilterHandle handle = render_interface->CompileFilter(name, parameters))