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#pragma once
#include <cstdint>
#include <vector>
namespace Donut
{
struct VertexBufferElement
{
uint32_t type;
uint32_t count;
uint8_t normalized;
uint32_t offset;
static uint32_t GetSizeOfType(uint32_t type);
};
class VertexBufferLayout
{
public:
VertexBufferLayout() = default;
~VertexBufferLayout() = default;
template<typename T>
void Push(uint32_t count)
{
static_assert(false);
}
template<>
void Push<float>(uint32_t count)
{
m_Elements.push_back({ 0x1406, count, 0, m_Stride }); // GL_FLOAT
m_Stride += count * VertexBufferElement::GetSizeOfType(0x1406);
}
template<>
void Push<uint32_t>(uint32_t count)
{
m_Elements.push_back({ 0x1405, count, 0, m_Stride }); // GL_UNSIGNED_INT
m_Stride += count * VertexBufferElement::GetSizeOfType(0x1405);
}
template<>
void Push<uint8_t>(uint32_t count)
{
m_Elements.push_back({ 0x1401, count, 1, m_Stride }); // GL_UNSIGNED_BYTE
m_Stride += count * VertexBufferElement::GetSizeOfType(0x1401);
}
inline const std::vector<VertexBufferElement>& GetElements() const { return m_Elements; }
inline uint32_t GetStride() const { return m_Stride; }
private:
std::vector<VertexBufferElement> m_Elements;
uint32_t m_Stride = 0;
};
class VertexBuffer
{
public:
virtual ~VertexBuffer() = default;
virtual void Bind() const = 0;
virtual void Unbind() const = 0;
virtual void SetData(const void* data, uint32_t size) = 0;
virtual const VertexBufferLayout& GetLayout() const = 0;
virtual void SetLayout(const VertexBufferLayout& layout) = 0;
static VertexBuffer* Create(const void* data, uint32_t size);
};
};
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