material.hpp

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#pragma once
#include "core_types.hpp"
#include "data.hpp"
#include "shader.hpp"
 
namespace assets {
 
enum class BlendMode : uint8_t {
  opaque,
  alpha,
  additive,
  multiply,
};
 
enum class CullMode : uint8_t {
  none,
  front,
  back,
};

struct MaterialSettings {
  BlendMode blend_mode = BlendMode::opaque;
  bool depth_test = true;
  bool depth_write = true;
  CullMode cull_mode = CullMode::back;
};

class TOAST_API Material : public Data {
public:
  explicit Material(const toml::table& table, Handle<Schema> schema = {});
  ~Material() override;
 
  [[nodiscard]]
  auto type() const -> std::string_view override {
    return "material";
  }
 
  [[nodiscard]]
  auto serialize(SaveMode mode) const -> std::vector<uint8_t> override;
 
  void reload(const toml::table& table) override;
 
  [[nodiscard]]
  auto name() const -> std::string;    
 
  [[nodiscard]]
  virtual auto shaders() const -> const std::vector<Handle<Shader>>&;
 
  [[nodiscard]]
  virtual auto settings() const -> MaterialSettings;

  [[nodiscard]]
  virtual auto value(std::string_view key) const -> const DataValue*;

  [[nodiscard]]
  virtual auto rootMaterial() -> Material* {
    return this;
  }
 
private:
  mutable std::vector<Handle<Shader>> m_shader_handles;
  mutable bool m_shaders_dirty = true;
};
}