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#pragma once
#include "GraphicsTags.hpp"
#include "RcPtr.hpp"
#include "SmallVector.hpp"
#include <glad/glad.h>
#include <cstddef>
#include <cstdint>
#include <vector>
struct GpuVertexBuffer : public RefCounted {
GLuint handle;
int sizeInBytes;
GpuVertexBuffer();
~GpuVertexBuffer();
void Upload(const std::byte* data, size_t sizeInBytes);
};
struct GpuIndexBuffer : public RefCounted {
GLuint handle;
Tags::IndexType indexType;
int count;
GpuIndexBuffer();
~GpuIndexBuffer();
Tags::IndexType GetIndexType() const { return indexType; }
GLenum GetIndexTypeGL() const { return Tags::FindGLType(indexType); }
void Upload(const std::byte* data, Tags::IndexType type, size_t count);
};
struct BufferBindings {
SmallVector<RcPtr<GpuVertexBuffer>, 4> bindings;
int GetMaxBindingIndex() const;
/// Safe. Returns nullptr if the index is not bound to any buffers.
GpuVertexBuffer* GetBinding(int index) const;
/// Adds or updates a buffer binding. Setting a binding to nullptr effectively removes the binding.
void SetBinding(int index, GpuVertexBuffer* buffer);
void Clear();
};
struct VertexElementFormat {
/// NOTE:
/// "Automatic" means it will be set inside VertexFormat::AddElement()
/// "Parameter" means it must be set by the user
/* Automatic */ int offset;
/* Parameter */ int bindingIndex;
/* Parameter */ Tags::VertexElementType type;
/* Parameter */ Tags::VertexElementSemantic semantic;
int GetStride() const;
};
struct VertexFormat : public RefCounted {
SmallVector<VertexElementFormat, 4> elements;
int vertexSize = 0;
const decltype(elements)& GetElements() const { return elements; }
void AddElement(VertexElementFormat element);
void RemoveElement(int index);
};
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