60 lines
1.5 KiB
C++
60 lines
1.5 KiB
C++
// Copyright (c) 2012-2023 Wojciech Figat. All rights reserved.
|
|
|
|
#pragma once
|
|
|
|
#include "RendererPass.h"
|
|
|
|
/// <summary>
|
|
/// Luminance histogram rendering pass. Uses compute shaders.
|
|
/// </summary>
|
|
class HistogramPass : public RendererPass<HistogramPass>
|
|
{
|
|
private:
|
|
|
|
AssetReference<Shader> _shader;
|
|
GPUShaderProgramCS* _csClearHistogram;
|
|
GPUShaderProgramCS* _csGenerateHistogram;
|
|
GPUBuffer* _histogramBuffer = nullptr;
|
|
bool _isSupported;
|
|
|
|
public:
|
|
|
|
/// <summary>
|
|
/// Performs the histogram rendering.
|
|
/// </summary>
|
|
/// <param name="renderContext">The rendering context.</param>
|
|
/// <param name="colorBuffer">The input color buffer to use as a luminance source.</param>
|
|
/// <returns>The created histogram, or null if failed or not supported.</param>
|
|
GPUBuffer* Render(RenderContext& renderContext, GPUTexture* colorBuffer);
|
|
|
|
/// <summary>
|
|
/// Gets the multiply and add value to pack or unpack data for histogram buffer.
|
|
/// </summary>
|
|
/// <param name="multiply">The multiply factor.</param>
|
|
/// <param name="add">The add factor.</param>
|
|
void GetHistogramMad(float& multiply, float& add);
|
|
|
|
private:
|
|
|
|
#if COMPILE_WITH_DEV_ENV
|
|
void OnShaderReloading(Asset* obj)
|
|
{
|
|
_csClearHistogram = nullptr;
|
|
_csGenerateHistogram = nullptr;
|
|
invalidateResources();
|
|
}
|
|
#endif
|
|
|
|
public:
|
|
|
|
// [RendererPass]
|
|
String ToString() const override;
|
|
bool Init() override;
|
|
void Dispose() override;
|
|
|
|
protected:
|
|
|
|
// [RendererPass]
|
|
bool setupResources() override;
|
|
};
|