VideoCommon: Cache native vertex formats

We are used to have a 1:1 mapping of GX vertex formats and the native (OGL + D3D) ones, but there are by far more GX ones.
This new cache maps them directly so that we don't flush on GX vertex format changes as long as the native one doesn't change.

The idea is stolen from galop1n.

1 files changed, 17 insertions, 0 deletions

diff --git a/Source/Core/VideoCommon/VertexLoaderManager.cpp b/Source/Core/VideoCommon/VertexLoaderManager.cpp
index b39577dd26..dd1196a48e 100644
--- a/Source/Core/VideoCommon/VertexLoaderManager.cpp
+++ b/Source/Core/VideoCommon/VertexLoaderManager.cpp
@@ -3,6 +3,7 @@
 // Refer to the license.txt file included.
 
 #include <algorithm>
+#include <memory>
 #include <unordered_map>
 #include <vector>
 
@@ -33,11 +34,13 @@ struct hash<VertexLoaderUID>
 }
 
 typedef std::unordered_map<VertexLoaderUID, VertexLoader*> VertexLoaderMap;
+typedef std::map<PortableVertexDeclaration, std::unique_ptr<NativeVertexFormat>> NativeVertexLoaderMap;
 
 namespace VertexLoaderManager
 {
 
 static VertexLoaderMap g_VertexLoaderMap;
+static NativeVertexLoaderMap s_native_vertex_map;
 // TODO - change into array of pointers. Keep a map of all seen so far.
 
 void Init()
@@ -55,6 +58,7 @@ void Shutdown()
 		delete p.second;
 	}
 	g_VertexLoaderMap.clear();
+	s_native_vertex_map.clear();
 }
 
 namespace
@@ -131,6 +135,19 @@ int GetVertexSize(int vtx_attr_group)
 	return RefreshLoader(vtx_attr_group)->GetVertexSize();
 }
 
+NativeVertexFormat* GetNativeVertexFormat(const PortableVertexDeclaration& format, u32 components)
+{
+	auto& native = s_native_vertex_map[format];
+	if (!native)
+	{
+		auto raw_pointer = g_vertex_manager->CreateNativeVertexFormat();
+		native = std::unique_ptr<NativeVertexFormat>(raw_pointer);
+		native->m_components = components;
+		native->Initialize(format);
+	}
+	return native.get();
+}
+
 }  // namespace
 
 void LoadCPReg(u32 sub_cmd, u32 value)