VertexBuffer.h

// Copyright(c) 2019 - 2020, #Momo
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#pragma once

namespace MxEngine
{
    enum class UsageType
    {
        STREAM_DRAW,
        STREAM_READ,
        STREAM_COPY,
        STATIC_DRAW,
        STATIC_READ,
        STATIC_COPY,
        DYNAMIC_DRAW,
        DYNAMIC_READ,
        DYNAMIC_COPY,
    };

    class VertexBuffer
    {
        using BindableId = unsigned int;
        using BufferData = const float*;

        BindableId id = 0;
        size_t size;
    public:
        explicit VertexBuffer();
        explicit VertexBuffer(BufferData data, size_t sizeInFloats, UsageType type);
        ~VertexBuffer();
        VertexBuffer(const VertexBuffer&) = delete;
        VertexBuffer(VertexBuffer&& vbo) noexcept;
        VertexBuffer& operator=(const VertexBuffer&) = delete;
        VertexBuffer& operator=(VertexBuffer&&) noexcept;

        BindableId GetNativeHandle() const;
        void Bind() const;
        void Unbind() const;
        void Load(BufferData data, size_t sizeInFloats, UsageType type);
        void BufferSubData(BufferData data, size_t sizeInFloats, size_t offsetInFloats = 0);
        void BufferDataWithResize(BufferData data, size_t sizeInFloats);
        size_t GetSize() const;
    };
}