#pragma once

#include "Core.h"

#ifdef _WIN32
struct ShaderStorageBuffer
{
	unsigned int SSBO;
	struct Desc
	{
		const void *data = 0;
		unsigned int dataLen;
		unsigned int usage = GL_DYNAMIC_COPY;
		unsigned int binding;
	};


	bool Create(const Desc &desc);

	template <typename T>
	bool Create(unsigned int binding)
	{
		Desc desc;
		desc.dataLen = sizeof(T);
		desc.binding = binding;
		return Create(desc);
	}
	
	template <typename T>
	void Write(const T &buf)
	{
		glBindBuffer(GL_SHADER_STORAGE_BUFFER, SSBO);
		GLvoid *p = glMapBuffer(GL_SHADER_STORAGE_BUFFER, GL_WRITE_ONLY);
		memcpy(p, &buf, sizeof(buf));
		glUnmapBuffer(GL_SHADER_STORAGE_BUFFER);
	};

	template <typename T>
	void Write(void *data, int len)
	{
		glBindBuffer(GL_SHADER_STORAGE_BUFFER, SSBO);
		GLvoid *p = glMapBuffer(GL_SHADER_STORAGE_BUFFER, GL_WRITE_ONLY);
		memcpy(p, data, len);
		glUnmapBuffer(GL_SHADER_STORAGE_BUFFER);
	}

	template <typename T>
	void Read(T &t)
	{
		Read(&t, sizeof(T));
	}
	void Read(void *data, int dataLen);
	void Delete();
};
#endif