RendererAPI.h

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#pragma once
 
#include "glm/glm.hpp"
#include <memory>
 
#include <ElevateEngine/Renderer/Commands/RenderCommandQueue.h>
 
namespace Elevate
{
    class VertexArray;
    class LayerStack;
}
 
namespace Elevate
{
    enum class DrawPrimitiveType
    {
        Points,
        Lines,
        LineStrip,
        LineLoop,      // OpenGL only
        Triangles,
        TriangleStrip,
        TriangleFan,   // OpenGL only
        Patches
    };
 
    class RendererAPI
    {
    public:
        enum class GraphicAPI
        {
            None = 0,
            OpenGL = 1,
        };
 
    public:
        virtual void SetClearColor(const glm::vec4& color) const = 0;
        virtual void SetViewport(int x, int y, int width, int height) const = 0;
        virtual void Clear() const = 0;
        virtual void FlushBuffers() const = 0;
        virtual void ClearTextureBindings() const = 0;
 
        virtual void DrawArray(const VertexArray* vao, DrawPrimitiveType primitive = DrawPrimitiveType::Triangles) const = 0;
        virtual void SetCullingState(bool enabled) const = 0;
        virtual void SetDepthWrittingState(bool enabled) const = 0;
        virtual void SetDepthTestingState(bool enabled) const = 0;
 
        inline static GraphicAPI GetAPI() { return s_ActiveAPI; }
        
    protected:
        // todo remove this
        //std::unordered_map<std::shared_ptr<Shader>, std::vector<Model>> m_ModelStack;
        //std::unordered_map<std::shared_ptr<Shader>, std::vector<Mesh>> m_MeshStack;
 
    private:
        static GraphicAPI s_ActiveAPI;
    };
}