//
// Created by atdunbg on 2026/9/23.
//
// BloomPass：Extract（HDR 软阈值）→ BlurH → BlurV，全部半分辨率。
// 一个"效果"对应多个 RG pass 的例子（Unity 的一个 ScriptableRenderPass
// 常含多个 PassEvent 阶段，同构）。
//

#ifndef HELLOVULKAN_BLOOMPASS_H
#define HELLOVULKAN_BLOOMPASS_H

#include <Engine/Renderer/Passes/RenderPass.h>
#include <Engine/Renderer/Passes/FullscreenGpu.h>
#include <vulkan/vulkan.hpp>
#include <vector>

namespace Engine::Passes {

    class BloomPass final : public RenderPass {
    public:
        BloomPass(FullscreenGpu& gpu, PostProcessParams& params,
                  RG::TextureHandle hdrColor,
                  RG::TextureHandle bloomA, RG::TextureHandle bloomB);
        ~BloomPass() override = default;

        void Register(RG::RenderGraph& rg) override;
        void OnTargetsRebuilt(RG::RenderGraph& rg) override;

    private:
        FullscreenGpu& m_Gpu;
        PostProcessParams& m_Params;
        RG::TextureHandle m_HDR;
        RG::TextureHandle m_A;   // 提取 + 垂直模糊结果
        RG::TextureHandle m_B;   // 水平模糊中间结果

        // per-slot 输入描述符
        std::vector<vk::DescriptorSet> m_ExtractSets;
        std::vector<vk::DescriptorSet> m_BlurHSets;
        std::vector<vk::DescriptorSet> m_BlurVSets;
    };

} // namespace Engine::Passes

#endif //HELLOVULKAN_BLOOMPASS_H