diff -r 000000000000 -r 6474c204b198 gfx/angle/src/libGLESv2/renderer/InputLayoutCache.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/angle/src/libGLESv2/renderer/InputLayoutCache.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,80 @@
+//
+// Copyright (c) 2012 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// InputLayoutCache.h: Defines InputLayoutCache, a class that builds and caches
+// D3D11 input layouts.
+
+#ifndef LIBGLESV2_RENDERER_INPUTLAYOUTCACHE_H_
+#define LIBGLESV2_RENDERER_INPUTLAYOUTCACHE_H_
+
+#include "libGLESv2/Constants.h"
+#include "common/angleutils.h"
+
+namespace gl
+{
+class ProgramBinary;
+}
+
+namespace rx
+{
+struct TranslatedAttribute;
+
+class InputLayoutCache
+{
+  public:
+    InputLayoutCache();
+    virtual ~InputLayoutCache();
+
+    void initialize(ID3D11Device *device, ID3D11DeviceContext *context);
+    void clear();
+    void markDirty();
+
+    GLenum applyVertexBuffers(TranslatedAttribute attributes[gl::MAX_VERTEX_ATTRIBS],
+                              gl::ProgramBinary *programBinary);
+
+  private:
+    DISALLOW_COPY_AND_ASSIGN(InputLayoutCache);
+
+    struct InputLayoutKey
+    {
+        unsigned int elementCount;
+        D3D11_INPUT_ELEMENT_DESC elements[gl::MAX_VERTEX_ATTRIBS];
+        GLenum glslElementType[gl::MAX_VERTEX_ATTRIBS];
+    };
+
+    struct InputLayoutCounterPair
+    {
+        ID3D11InputLayout *inputLayout;
+        unsigned long long lastUsedTime;
+    };
+
+    ID3D11InputLayout *mCurrentIL;
+    unsigned int mCurrentBuffers[gl::MAX_VERTEX_ATTRIBS];
+    UINT mCurrentVertexStrides[gl::MAX_VERTEX_ATTRIBS];
+    UINT mCurrentVertexOffsets[gl::MAX_VERTEX_ATTRIBS];
+
+    static std::size_t hashInputLayout(const InputLayoutKey &inputLayout);
+    static bool compareInputLayouts(const InputLayoutKey &a, const InputLayoutKey &b);
+
+    typedef std::size_t (*InputLayoutHashFunction)(const InputLayoutKey &);
+    typedef bool (*InputLayoutEqualityFunction)(const InputLayoutKey &, const InputLayoutKey &);
+    typedef std::unordered_map<InputLayoutKey,
+                               InputLayoutCounterPair,
+                               InputLayoutHashFunction,
+                               InputLayoutEqualityFunction> InputLayoutMap;
+    InputLayoutMap mInputLayoutMap;
+
+    static const unsigned int kMaxInputLayouts;
+
+    unsigned long long mCounter;
+
+    ID3D11Device *mDevice;
+    ID3D11DeviceContext *mDeviceContext;
+};
+
+}
+
+#endif // LIBGLESV2_RENDERER_INPUTLAYOUTCACHE_H_