GeometryPass.h

#pragma once

#include <memory>
#include <vector>

#include <CommandManager\CommandListPerFrame.h>
#include <GeometryPass\GeometryPassCommandListRecorder.h>

struct D3D12_CPU_DESCRIPTOR_HANDLE;
struct ID3D12Resource;

namespace BRE {
struct FrameCBuffer;

// Pass responsible to execute recorders related with deferred shading geometry pass
class GeometryPass {
public:
    // Geometry buffers
    enum Buffers {
        NORMAL_SMOOTHNESS = 0U, // 2 encoded normals based on octahedron encoding + 1 smoothness
        BASECOLOR_METALMASK, // 3 base color + 1 metal mask
        BUFFERS_COUNT
    };

    GeometryPass(GeometryPassCommandListRecorders& geometryPassCommandListRecorders);
    ~GeometryPass() = default;
    GeometryPass(const GeometryPass&) = delete;
    const GeometryPass& operator=(const GeometryPass&) = delete;
    GeometryPass(GeometryPass&&) = delete;
    GeometryPass& operator=(GeometryPass&&) = delete;

    // Preconditions:
    // - You should fill recorders with GetCommandListRecorders() before
    void Init(const D3D12_CPU_DESCRIPTOR_HANDLE& depthBufferView) noexcept;

    __forceinline Microsoft::WRL::ComPtr<ID3D12Resource>* GetGeometryBuffers() noexcept
    {
        return mGeometryBuffers;
    }

    // Preconditions:
    // - Init() must be called first
    void Execute(const FrameCBuffer& frameCBuffer) noexcept;

private:
    // Method used internally for validation purposes
    bool IsDataValid() const noexcept;

    void ExecuteBeginTask() noexcept;

    CommandListPerFrame mCommandListPerFrame;

    // Geometry buffers data
    Microsoft::WRL::ComPtr<ID3D12Resource> mGeometryBuffers[BUFFERS_COUNT];
    D3D12_CPU_DESCRIPTOR_HANDLE mGeometryBufferRenderTargetViews[BUFFERS_COUNT];

    D3D12_CPU_DESCRIPTOR_HANDLE mDepthBufferView{ 0UL };

    GeometryPassCommandListRecorders& mGeometryPassCommandListRecorders;
};

}