Created InputLayoutCache for D3D11 input layouts and vertex buffer application.
TRAC #22235
Author: Geoff Lang
Signed-off-by: Shannon Woods
Signed-off-by: Daniel Koch
git-svn-id: https://angleproject.googlecode.com/svn/branches/dx11proto@1609 736b8ea6-26fd-11df-bfd4-992fa37f6226
diff --git a/src/libGLESv2/renderer/InputLayoutCache.h b/src/libGLESv2/renderer/InputLayoutCache.h
new file mode 100644
index 0000000..209241a
--- /dev/null
+++ b/src/libGLESv2/renderer/InputLayoutCache.h
@@ -0,0 +1,71 @@
+//
+// 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/Context.h"
+
+#include "libGLESv2/renderer/VertexDataManager.h"
+
+#include <D3D11.h>
+#include <unordered_map>
+
+namespace rx
+{
+
+class InputLayoutCache
+{
+ public:
+ InputLayoutCache();
+ virtual ~InputLayoutCache();
+
+ void initialize(ID3D11Device *device, ID3D11DeviceContext *context);
+ void clear();
+
+ 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];
+ };
+
+ struct InputLayoutCounterPair
+ {
+ ID3D11InputLayout *inputLayout;
+ unsigned long long lastUsedTime;
+ };
+
+ 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_