renderPassSsao.h

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// SPDX-License-Identifier: Apache-2.0
// Copyright 2025-2026 Arnis Lektauers
//
//
#pragma once
 
#include <memory>
#include <string>
 
#include "renderPassShaderQuad.h"
 
namespace visutwin::canvas
{
    class CameraComponent;
    class RenderPassDepthAwareBlur;

    class RenderPassSsao : public RenderPassShaderQuad
    {
    public:
        RenderPassSsao(const std::shared_ptr<GraphicsDevice>& device, Texture* sourceTexture,
            CameraComponent* cameraComponent, bool blurEnabled);
        ~RenderPassSsao();
 
        // SSAO parameters (matching upstream RenderPassSsao)
        float radius = 30.0f;
        float intensity = 0.5f;
        float power = 6.0f;
        int sampleCount = 12;
        float minAngle = 10.0f;
        bool randomize = false;

        Texture* ssaoTexture() const { return _ssaoTexture.get(); }
 
        void execute() override;
        void after() override;
 
        void setScale(float value);
        float scale() const { return _scale; }
 
    private:
        std::shared_ptr<RenderTarget> createSsaoRenderTarget(const std::string& name,
            std::shared_ptr<Texture>& outTexture) const;
 
        Texture* _sourceTexture = nullptr;
        CameraComponent* _cameraComponent = nullptr;
        bool _blurEnabled = true;
        float _scale = 1.0f;
 
        std::shared_ptr<Texture> _ssaoTexture;
        std::shared_ptr<RenderTarget> _ssaoRenderTarget;
 
        // Blur temp resources
        std::shared_ptr<Texture> _blurTempTexture;
        std::shared_ptr<RenderTarget> _blurTempRenderTarget;
        std::shared_ptr<RenderPassDepthAwareBlur> _blurPassH;
        std::shared_ptr<RenderPassDepthAwareBlur> _blurPassV;
 
        float _blueNoiseValue = 0.0f;
    };
}