src/third_party/angle/src/libGLESv2/renderer/d3d/d3d11/InputLayoutCache.h

   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 InputLayoutElement
  42     {
  43         D3D11_INPUT_ELEMENT_DESC desc;
  44         GLenum glslElementType;
  45     };
  46
  47     struct InputLayoutKey
  48     {
  49         unsigned int elementCount;
  50         InputLayoutElement elements[gl::MAX_VERTEX_ATTRIBS];
  51
  52         const char *begin() const
  53         {
  54             return reinterpret_cast<const char*>(&elementCount);
  55         }
  56
  57         const char *end() const
  58         {
  59             return reinterpret_cast<const char*>(&elements[elementCount]);
  60         }
  61     };
  62
  63     struct InputLayoutCounterPair
  64     {
  65         ID3D11InputLayout *inputLayout;
  66         unsigned long long lastUsedTime;
  67     };
  68
  69     ID3D11InputLayout *mCurrentIL;
  70     ID3D11Buffer *mCurrentBuffers[gl::MAX_VERTEX_ATTRIBS];
  71     UINT mCurrentVertexStrides[gl::MAX_VERTEX_ATTRIBS];
  72     UINT mCurrentVertexOffsets[gl::MAX_VERTEX_ATTRIBS];
  73
  74     static std::size_t hashInputLayout(const InputLayoutKey &inputLayout);
  75     static bool compareInputLayouts(const InputLayoutKey &a, const InputLayoutKey &b);
  76
  77     typedef std::size_t (*InputLayoutHashFunction)(const InputLayoutKey &);
  78     typedef bool (*InputLayoutEqualityFunction)(const InputLayoutKey &, const InputLayoutKey &);
  79     typedef std::unordered_map<InputLayoutKey,
  80                                InputLayoutCounterPair,
  81                                InputLayoutHashFunction,
  82                                InputLayoutEqualityFunction> InputLayoutMap;
  83     InputLayoutMap mInputLayoutMap;
  84
  85     static const unsigned int kMaxInputLayouts;
  86
  87     unsigned long long mCounter;
  88
  89     ID3D11Device *mDevice;
  90     ID3D11DeviceContext *mDeviceContext;
  91 };
  92
  93 }
  94
  95 #endif // LIBGLESV2_RENDERER_INPUTLAYOUTCACHE_H_