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Source/Engine/Renderer/EyeAdaptationPass.h

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+// Copyright (c) 2012-2020 Wojciech Figat. All rights reserved.
+
+#pragma once
+
+#include "RendererPass.h"
+
+/// <summary>
+/// Eye adaptation effect based on color buffer luminance.
+/// </summary>
+class EyeAdaptationPass : public RendererPass<EyeAdaptationPass>
+{
+private:
+
+    AssetReference<Shader> _shader;
+    GPUPipelineState* _psManual = nullptr;
+    GPUPipelineState* _psLuminanceMap = nullptr;
+    GPUPipelineState* _psBlendLuminance = nullptr;
+    GPUPipelineState* _psApplyLuminance = nullptr;
+    GPUPipelineState* _psHistogram = nullptr;
+    bool _canUseHistogram;
+
+public:
+
+    /// <summary>
+    /// Performs the eye adaptation effect.
+    /// </summary>
+    /// <param name="renderContext">The rendering context.</param>
+    /// <param name="colorBuffer">The input and output color buffer to apply eye adaptation effect to it.</param>
+    void Render(RenderContext& renderContext, GPUTexture* colorBuffer);
+
+private:
+
+#if COMPILE_WITH_DEV_ENV
+    void OnShaderReloading(Asset* obj)
+    {
+        _psManual->ReleaseGPU();
+        _psLuminanceMap->ReleaseGPU();
+        _psBlendLuminance->ReleaseGPU();
+        _psApplyLuminance->ReleaseGPU();
+        _psHistogram->ReleaseGPU();
+        invalidateResources();
+    }
+#endif
+
+public:
+
+    // [RendererPass]
+    String ToString() const override;
+    bool Init() override;
+    void Dispose() override;
+
+protected:
+
+    // [RendererPass]
+    bool setupResources() override;
+};