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      1 //
      2 // Copyright (c) 2013 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 // Clear11.h: Framebuffer clear utility class.
      8 
      9 #ifndef LIBGLESV2_RENDERER_CLEAR11_H_
     10 #define LIBGLESV2_RENDERER_CLEAR11_H_
     11 
     12 #include "libGLESv2/angletypes.h"
     13 #include "libGLESv2/Error.h"
     14 
     15 #include <map>
     16 #include <vector>
     17 
     18 namespace gl
     19 {
     20 class Framebuffer;
     21 }
     22 
     23 namespace rx
     24 {
     25 class Renderer11;
     26 class RenderTarget11;
     27 
     28 class Clear11
     29 {
     30   public:
     31     explicit Clear11(Renderer11 *renderer);
     32     ~Clear11();
     33 
     34     // Clears the framebuffer with the supplied clear parameters, assumes that the framebuffer is currently applied.
     35     gl::Error clearFramebuffer(const gl::ClearParameters &clearParams, gl::Framebuffer *frameBuffer);
     36 
     37   private:
     38     Renderer11 *mRenderer;
     39 
     40     struct ClearBlendInfo
     41     {
     42         bool maskChannels[D3D11_SIMULTANEOUS_RENDER_TARGET_COUNT][4];
     43     };
     44     typedef bool (*ClearBlendInfoComparisonFunction)(const ClearBlendInfo&, const ClearBlendInfo &);
     45     typedef std::map<ClearBlendInfo, ID3D11BlendState*, ClearBlendInfoComparisonFunction> ClearBlendStateMap;
     46     ClearBlendStateMap mClearBlendStates;
     47 
     48     struct MaskedRenderTarget
     49     {
     50         bool colorMask[4];
     51         RenderTarget11 *renderTarget;
     52     };
     53 
     54     ID3D11BlendState *getBlendState(const std::vector<MaskedRenderTarget> &rts);
     55 
     56     struct ClearShader
     57     {
     58         ID3D11InputLayout *inputLayout;
     59         ID3D11VertexShader *vertexShader;
     60         ID3D11PixelShader *pixelShader;
     61     };
     62     ClearShader mFloatClearShader;
     63     ClearShader mUintClearShader;
     64     ClearShader mIntClearShader;
     65 
     66     template <unsigned int vsSize, unsigned int psSize>
     67     static ClearShader CreateClearShader(ID3D11Device *device, DXGI_FORMAT colorType, const BYTE (&vsByteCode)[vsSize], const BYTE (&psByteCode)[psSize]);
     68 
     69     struct ClearDepthStencilInfo
     70     {
     71         bool clearDepth;
     72         bool clearStencil;
     73         UINT8 stencilWriteMask;
     74     };
     75     typedef bool (*ClearDepthStencilInfoComparisonFunction)(const ClearDepthStencilInfo&, const ClearDepthStencilInfo &);
     76     typedef std::map<ClearDepthStencilInfo, ID3D11DepthStencilState*, ClearDepthStencilInfoComparisonFunction> ClearDepthStencilStateMap;
     77     ClearDepthStencilStateMap mClearDepthStencilStates;
     78 
     79     ID3D11DepthStencilState *getDepthStencilState(const gl::ClearParameters &clearParams);
     80 
     81     ID3D11Buffer *mVertexBuffer;
     82     ID3D11RasterizerState *mRasterizerState;
     83 };
     84 
     85 }
     86 
     87 #endif // LIBGLESV2_RENDERER_CLEAR11_H_
     88