VertexBufferLayout.h

#pragma once
 
#include "common/types/OpenGLTypes.h"
#include "utils/Error.h"
 
namespace Vivid
{
    struct VertexBufferElement
    {
        unsigned int type;
        unsigned int count;
        unsigned char normalised;
 
        static unsigned int GetSizeOfType(unsigned int type)
        {
            switch (type)
            {
            case GL_FLOAT:
                return 4;
            case GL_UNSIGNED_INT:
                return 4;
            case GL_UNSIGNED_BYTE:
                return 1;
                break;
            }
            ASSERT(false);
            return 0;
        }
    };
 
    class VertexBufferLayout
    {
    private:
        unsigned int m_Stride;
        Vector<VertexBufferElement> m_Elements;
 
        void Push(unsigned int type, unsigned int count, unsigned char normalized)
        {
            m_Elements.push_back({ type, count, normalized });
            m_Stride += count * VertexBufferElement::GetSizeOfType(type);
        };
 
    public:
        VertexBufferLayout()
            : m_Stride(0)
        {
        }
 
        void AddFloat(unsigned int count) { Push(GL_FLOAT, count, GL_FALSE); }
 
        void AddUnsignedInt(unsigned int count) { Push(GL_UNSIGNED_INT, count, GL_FALSE); }
 
        void AddUnsignedByte(unsigned int count) { Push(GL_UNSIGNED_BYTE, count, GL_TRUE); }
 
        inline const Vector<VertexBufferElement> GetElements() const { return m_Elements; };
 
        inline unsigned int GetStride() const { return m_Stride; };
    };
}