engine/include/resources/shader.h

#pragma once

#include "application.h"
#include "gfx.h"
#include "gfx_device.h"

namespace engine {

class Shader {
   public:
    // defines what vertex inputs are defined, position is always vec3
    struct VertexParams {
        bool has_normal;  // vec3
        bool has_tangent; // vec3
        bool has_color;   // vec3
        bool has_uv0;     // vec2
    };

    struct ShaderSettings {
        VertexParams vertexParams;
        bool alpha_blending;
        bool cull_backface;
        bool write_z;
        int render_order;
    };

    static constexpr int kHighestRenderOrder = 1;

    Shader(Renderer* renderer, const std::string& vert_path, const std::string& frag_path, const ShaderSettings& settings);
    ~Shader();
    Shader(const Shader&) = delete;
    Shader& operator=(const Shader&) = delete;

    const gfx::Pipeline* GetPipeline();
    int GetRenderOrder() { return render_order_; }

   private:
    GFXDevice* const gfx_;
    const gfx::Pipeline* pipeline_;
    const int render_order_;
};

} // namespace engine