metaforce/Runtime/Graphics/Shaders/CModelShaders.hpp

#pragma once

#include <array>
#include <cstdint>
#include <memory>

#include "DataSpec/DNAMP1/CMDLMaterials.hpp"

#include "Runtime/Graphics/CGraphics.hpp"

#include <zeus/CColor.hpp>
#include <zeus/CVector3f.hpp>
#include <zeus/CVector4f.hpp>

#define URDE_MAX_LIGHTS 8

namespace hecl::Backend {
class ShaderTag;
}

namespace urde {
class CLight;

enum class EExtendedShader : uint8_t {
  Flat,
  Lighting,
  ThermalModel,
  ThermalModelNoZTestNoZWrite,
  ThermalStatic,
  ThermalStaticNoZWrite,
  ForcedAlpha,
  ForcedAdditive,
  SolidColor,
  SolidColorAdditive,
  SolidColorFrontfaceCullLEqualAlphaOnly,
  SolidColorFrontfaceCullAlwaysAlphaOnly, // No Z-write or test
  SolidColorBackfaceCullLEqualAlphaOnly,
  SolidColorBackfaceCullGreaterAlphaOnly, // No Z-write
  MorphBallShadow,
  WorldShadow,
  ForcedAlphaNoCull,
  ForcedAdditiveNoCull,
  ForcedAlphaNoZWrite,
  ForcedAdditiveNoZWrite,
  ForcedAlphaNoCullNoZWrite,
  ForcedAdditiveNoCullNoZWrite,
  DepthGEqualNoZWrite,
  Disintegrate,
  ForcedAdditiveNoZWriteDepthGreater,
  ThermalCold,
  LightingAlphaWrite,
  LightingAlphaWriteNoZTestNoZWrite,
  LightingCubeReflection,
  LightingCubeReflectionWorldShadow,
  MAX
};

class CModelShaders {
  friend class CModel;

public:
  struct Light {
    zeus::CVector3f pos;
    zeus::CVector3f dir;
    zeus::CColor color = zeus::skClear;
    std::array<float, 4> linAtt{1.f, 0.f, 0.f};
    std::array<float, 4> angAtt{1.f, 0.f, 0.f};
  };

  struct LightingUniform {
    std::array<Light, URDE_MAX_LIGHTS> lights;
    zeus::CColor ambient;
    std::array<zeus::CColor, 3> colorRegs;
    zeus::CColor mulColor;
    zeus::CColor addColor;
    CGraphics::CFogState fog;

    void ActivateLights(const std::vector<CLight>& lts);
  };

  struct ThermalUniform {
    zeus::CColor mulColor;
    zeus::CColor addColor;
  };

  struct SolidUniform {
    zeus::CColor solidColor;
  };

  struct MBShadowUniform {
    zeus::CVector4f shadowUp;
    float shadowId;
  };

  struct OneTextureUniform {
    zeus::CColor addColor;
    CGraphics::CFogState fog;
  };

  static void Initialize();
  static void Shutdown();

  using ShaderPipelinesData = std::array<boo::ObjToken<boo::IShaderPipeline>, size_t(EExtendedShader::MAX)>;
  using ShaderPipelines = std::shared_ptr<ShaderPipelinesData>;

  using Material = DataSpec::DNAMP1::HMDLMaterialSet::Material;
  static ShaderPipelines BuildExtendedShader(const hecl::Backend::ShaderTag& tag, const Material& material);

private:
  static std::unordered_map<uint64_t, ShaderPipelines> g_ShaderPipelines;
};

} // namespace urde