Program Listing for File RenderSystem.hpp

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#pragma once
#include "../System.hpp"
#include "../EventSubscriber.hpp"

namespace bgfx
{
    struct VertexDecl;
    struct ProgramHandle;
}

namespace ari
{
    class BoxShape;

    class ARI_API RenderSystem: public System,
        public EventSubscriber<events::OnComponentAssigned<BoxShape>>,
        public EventSubscriber<events::OnFrameData>
    {
    public:

        enum class VertexType
        {
            Pos,
            Color,
            Count
        };

        RenderSystem();
        ~RenderSystem();

        void Update(World* p_world, UpdateState state) override;
        void Configure(World* p_world) override;
        void Unconfigure(World* p_world) override;
        Type GetSystemType() override
        {
            return Type::RenderSystem;
        }
        bool NeedUpdateOnState(UpdateState state) override;

        void Receive(World* world, const events::OnComponentAssigned<BoxShape>& event) override;
        void Receive(World* world, const events::OnFrameData& event) override;

        bgfx::VertexDecl* GetVertexDecl(VertexType vertex_type) const;

        bgfx::ProgramHandle* GetProgram() const { return m_Program; }

    protected:

        bgfx::VertexDecl    *   m_pVertexDeclArray;
        bgfx::ProgramHandle *   m_Program;
        FrameData           *   m_pFrameDataCurrent,
                            *   m_pFrameDataNext;
        uint16_t                m_view_id = 0;
    };

} // ari