DX12MaterialManager.h

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//
// Created by zhou_zhengming on 2026/5/22.
//
 
#pragma once
#include "DX12Common.h"
#include "DX12DefaultBuffer.h"
#include "Material/BaseMaterial.h"
#include "Resource/ResourceRef.h"
#include <DirectXMath.h>
#include <cstddef>
#include <cstdint>
#include <unordered_map>
 
 
namespace z8 {
class BaseMaterial;
 
struct DX12Material {
  DirectX::XMFLOAT4 Albedo;
  DirectX::XMFLOAT3 FresnelR0;
  float Rough = 0.25f;
  uint32_t HasBaseColorTexture = 0;
  DirectX::XMFLOAT3 Padding = {};
 
  explicit DX12Material(const BaseMaterial* material);
};
static_assert(offsetof(DX12Material, HasBaseColorTexture) == 32,
              "Material texture flag must match cbMaterial packing.");
static_assert(sizeof(DX12Material) == 48,
              "Material constants must match cbMaterial size.");
 
class DX12MaterialManager : public DX12Common{
public:
  DX12DefaultBuffer Buffer;
 
  DX12MaterialManager(DX12Render* R);
  void Init();
  uint64_t GetGPUAddress(ResourceRef<BaseMaterial> material) const;
 
private:
  std::unordered_map<ResourceRef<BaseMaterial>, uint64_t,
                     ResourceRefHash<BaseMaterial>> Offsets;
};
}