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Source/Engine/Renderer/MotionBlurPass.h

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+// Copyright (c) 2012-2020 Wojciech Figat. All rights reserved.
+
+#pragma once
+
+#include "RendererPass.h"
+
+/// <summary>
+/// Anti aliasing rendering service
+/// </summary>
+class MotionBlurPass : public RendererPass<MotionBlurPass>
+{
+private:
+    PACK_STRUCT(struct Data {
+        GBufferData GBuffer;
+        Matrix CurrentVP;
+        Matrix PreviousVP;
+        Vector4 TemporalAAJitter;
+        Vector2 TileMaxOffs;
+        float VelocityScale;
+        int32 TileMaxLoop;
+        float MaxBlurRadius;
+        float RcpMaxBlurRadius;
+        Vector2 TexelSize1;
+        Vector2 TexelSize2;
+        Vector2 TexelSize4;
+        Vector2 TexelSizeV;
+        Vector2 TexelSizeNM;
+        float LoopCount;
+        float Dummy0;
+        Vector2 MotionVectorsTexelSize;
+        float DebugBlend;
+        float DebugAmplitude;
+        int32 DebugColumnCount;
+        int32 DebugRowCount;
+        });
+
+    PixelFormat _motionVectorsFormat;
+    PixelFormat _velocityFormat;
+    AssetReference<Shader> _shader;
+    GPUPipelineState* _psCameraMotionVectors;
+    GPUPipelineState* _psMotionVectorsDebug;
+    GPUPipelineState* _psMotionVectorsDebugArrow;
+    GPUPipelineState* _psVelocitySetup;
+    GPUPipelineState* _psTileMax1;
+    GPUPipelineState* _psTileMax2;
+    GPUPipelineState* _psTileMax4;
+    GPUPipelineState* _psTileMaxV;
+    GPUPipelineState* _psNeighborMax;
+    GPUPipelineState* _psReconstruction;
+
+public:
+
+    /// <summary>
+    /// Init
+    /// </summary>
+    MotionBlurPass();
+
+public:
+
+    /// <summary>
+    /// Renders the motion vectors texture for the current task. Skips if motion blur is disabled or no need to render motion vectors.
+    /// </summary>
+    /// <param name="renderContext">The rendering context.</param>
+    void RenderMotionVectors(RenderContext& renderContext);
+
+    /// <summary>
+    /// Renders the motion vectors debug view.
+    /// </summary>
+    /// <param name="renderContext">The rendering context.</param>
+    /// <param name="frame">The source frame.</param>
+    void RenderDebug(RenderContext& renderContext, GPUTextureView* frame);
+
+    /// <summary>
+    /// Renders the motion blur. Swaps the input with output if rendering is performed. Does nothing if rendering is not performed.
+    /// </summary>
+    /// <param name="renderContext">The rendering context.</param>
+    /// <param name="input">The input frame.</param>
+    /// <param name="output">The output frame.</param>
+    void Render(RenderContext& renderContext, GPUTexture*& input, GPUTexture*& output);
+
+private:
+
+#if COMPILE_WITH_DEV_ENV
+    void OnShaderReloading(Asset* obj)
+    {
+        _psCameraMotionVectors->ReleaseGPU();
+        _psMotionVectorsDebug->ReleaseGPU();
+        _psMotionVectorsDebugArrow->ReleaseGPU();
+        _psVelocitySetup->ReleaseGPU();
+        _psTileMax1->ReleaseGPU();
+        _psTileMax2->ReleaseGPU();
+        _psTileMax4->ReleaseGPU();
+        _psTileMaxV->ReleaseGPU();
+        _psNeighborMax->ReleaseGPU();
+        _psReconstruction->ReleaseGPU();
+        invalidateResources();
+    }
+#endif
+
+public:
+
+    // [RendererPass]
+    String ToString() const override;
+    bool Init() override;
+    void Dispose() override;
+
+protected:
+
+    // [RendererPass]
+    bool setupResources() override;
+};