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      1 //
      2 // Copyright (c) 2012 The ANGLE Project Authors. All rights reserved.
      3 // Use of this source code is governed by a BSD-style license that can be
      4 // found in the LICENSE file.
      5 //
      6 
      7 // InputLayoutCache.h: Defines InputLayoutCache, a class that builds and caches
      8 // D3D11 input layouts.
      9 
     10 #ifndef LIBGLESV2_RENDERER_INPUTLAYOUTCACHE_H_
     11 #define LIBGLESV2_RENDERER_INPUTLAYOUTCACHE_H_
     12 
     13 #include "libGLESv2/Constants.h"
     14 #include "common/angleutils.h"
     15 
     16 namespace gl
     17 {
     18 class ProgramBinary;
     19 }
     20 
     21 namespace rx
     22 {
     23 struct TranslatedAttribute;
     24 
     25 class InputLayoutCache
     26 {
     27   public:
     28     InputLayoutCache();
     29     virtual ~InputLayoutCache();
     30 
     31     void initialize(ID3D11Device *device, ID3D11DeviceContext *context);
     32     void clear();
     33     void markDirty();
     34 
     35     GLenum applyVertexBuffers(TranslatedAttribute attributes[gl::MAX_VERTEX_ATTRIBS],
     36                               gl::ProgramBinary *programBinary);
     37 
     38   private:
     39     DISALLOW_COPY_AND_ASSIGN(InputLayoutCache);
     40 
     41     struct InputLayoutKey
     42     {
     43         unsigned int elementCount;
     44         D3D11_INPUT_ELEMENT_DESC elements[gl::MAX_VERTEX_ATTRIBS];
     45         GLenum glslElementType[gl::MAX_VERTEX_ATTRIBS];
     46     };
     47 
     48     struct InputLayoutCounterPair
     49     {
     50         ID3D11InputLayout *inputLayout;
     51         unsigned long long lastUsedTime;
     52     };
     53 
     54     ID3D11InputLayout *mCurrentIL;
     55     unsigned int mCurrentBuffers[gl::MAX_VERTEX_ATTRIBS];
     56     UINT mCurrentVertexStrides[gl::MAX_VERTEX_ATTRIBS];
     57     UINT mCurrentVertexOffsets[gl::MAX_VERTEX_ATTRIBS];
     58 
     59     static std::size_t hashInputLayout(const InputLayoutKey &inputLayout);
     60     static bool compareInputLayouts(const InputLayoutKey &a, const InputLayoutKey &b);
     61 
     62     typedef std::size_t (*InputLayoutHashFunction)(const InputLayoutKey &);
     63     typedef bool (*InputLayoutEqualityFunction)(const InputLayoutKey &, const InputLayoutKey &);
     64     typedef std::unordered_map<InputLayoutKey,
     65                                InputLayoutCounterPair,
     66                                InputLayoutHashFunction,
     67                                InputLayoutEqualityFunction> InputLayoutMap;
     68     InputLayoutMap mInputLayoutMap;
     69 
     70     static const unsigned int kMaxInputLayouts;
     71 
     72     unsigned long long mCounter;
     73 
     74     ID3D11Device *mDevice;
     75     ID3D11DeviceContext *mDeviceContext;
     76 };
     77 
     78 }
     79 
     80 #endif // LIBGLESV2_RENDERER_INPUTLAYOUTCACHE_H_
     81