Added ShadowMapManager

1 files changed, 80 insertions, 0 deletions

diff --git a/Components/interface/ShadowMapManager.h b/Components/interface/ShadowMapManager.h
new file mode 100644
index 0000000..72c393e
--- /dev/null
+++ b/Components/interface/ShadowMapManager.h
@@ -0,0 +1,80 @@
+/*     Copyright 2015-2019 Egor Yusov
+ *  
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF ANY PROPRIETARY RIGHTS.
+ *
+ *  In no event and under no legal theory, whether in tort (including negligence), 
+ *  contract, or otherwise, unless required by applicable law (such as deliberate 
+ *  and grossly negligent acts) or agreed to in writing, shall any Contributor be
+ *  liable for any damages, including any direct, indirect, special, incidental, 
+ *  or consequential damages of any character arising as a result of this License or 
+ *  out of the use or inability to use the software (including but not limited to damages 
+ *  for loss of goodwill, work stoppage, computer failure or malfunction, or any and 
+ *  all other commercial damages or losses), even if such Contributor has been advised 
+ *  of the possibility of such damages.
+ */
+
+#include <vector>
+#include "../../../DiligentCore/Graphics/GraphicsEngine/interface/RenderDevice.h"
+#include "../../../DiligentCore/Graphics/GraphicsEngine/interface/Texture.h"
+#include "../../../DiligentCore/Graphics/GraphicsEngine/interface/TextureView.h"
+#include "../../../DiligentCore/Common/interface/RefCntAutoPtr.h"
+#include "../../../DiligentCore/Common/interface/BasicMath.h"
+
+namespace Diligent
+{
+
+#include "../../Shaders/Common/public/BasicStructures.fxh"
+
+class ShadowMapManager
+{
+public:
+    ShadowMapManager();
+
+    struct InitInfo
+    {
+        TEXTURE_FORMAT Fmt                = TEX_FORMAT_UNKNOWN;
+        Uint32         Resolution         = 0;
+        Uint32         NumCascades        = 0;
+        ISampler*      pComparisonSampler = nullptr;
+    };
+    void Initialize(IRenderDevice* pDevice, const InitInfo& initInfo);
+
+    ITextureView* GetSRV()                     { return m_pShadowMapSRV;           }
+    ITextureView* GetCascadeDSV(Uint32 Cascade){ return m_pShadowMapDSVs[Cascade]; }
+
+    struct DistributeCascadeInfo
+    {
+        const float4x4*    pCameraView = nullptr;
+        const float4x4*    pCameraProj = nullptr;
+        const float3*      pCameraPos  = nullptr;
+        const float3*      pLightDir   = nullptr;
+        std::function<void(int, float&, float&)> AdjustCascadeRange;
+    };
+
+    struct CascadeTransforms
+    {
+        float4x4 Proj;
+        float4x4 WorldToLightProjSpace;
+    };
+
+    void DistributeCascades(const DistributeCascadeInfo& Info,
+                            ShadowMapAttribs&            shadowMapAttribs);
+
+    const CascadeTransforms& GetCascadeTranform(Uint32 Cascade) const {return m_CascadeTransforms[Cascade];}
+
+private:
+    RefCntAutoPtr<IRenderDevice>             m_pDevice;
+    RefCntAutoPtr<ITextureView>              m_pShadowMapSRV;
+    std::vector<RefCntAutoPtr<ITextureView>> m_pShadowMapDSVs;
+    std::vector<CascadeTransforms>           m_CascadeTransforms;
+};
+
+}