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Source/Engine/Renderer/ColorGradingPass.h

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+// Copyright (c) 2012-2020 Wojciech Figat. All rights reserved.
+
+#pragma once
+
+#include "RendererPass.h"
+#include "Engine/Graphics/GPUPipelineStatePermutations.h"
+
+/// <summary>
+/// Color Grading and Tone Mapping rendering service. Generates HDR LUT for PostFx pass.
+/// </summary>
+class ColorGradingPass : public RendererPass<ColorGradingPass>
+{
+private:
+
+    bool _useVolumeTexture;
+    PixelFormat _lutFormat;
+    AssetReference<Shader> _shader;
+    GPUPipelineStatePermutationsPs<3> _psLut;
+
+public:
+
+    /// <summary>
+    /// Init
+    /// </summary>
+    ColorGradingPass();
+
+public:
+
+    /// <summary>
+    /// Performs Look Up Table rendering for the input task.
+    /// </summary>
+    /// <param name="renderContext">The rendering context.</param>
+    /// <returns>Allocated temp render target with a rendered LUT. Can be 2d or 3d based on current graphics hardware caps. Release after usage.</returns>
+    GPUTexture* RenderLUT(RenderContext& renderContext);
+
+private:
+
+#if COMPILE_WITH_DEV_ENV
+    void OnShaderReloading(Asset* obj)
+    {
+        _psLut.Release();
+        invalidateResources();
+    }
+#endif
+
+public:
+
+    // [RendererPass]
+    String ToString() const override;
+    bool Init() override;
+    void Dispose() override;
+
+protected:
+
+    // [RendererPass]
+    bool setupResources() override;
+};