Shader.h

#pragma once

#include <string>
#include <unordered_map>


struct ShaderProgramSource
{
	std::string VertexSource;
	std::string FragmentSource;
};

class Shader
{
private:
	std::string m_FilePath;
	unsigned int m_RendererID;
	std::unordered_map<std::string, int>m_UniformLocationCache;

public:
	Shader(const std::string& filepath);

	~Shader();

	void Bind() const;

	void Unbind() const;

	//set uniforms
	void SetUniform1i(const std::string& name, int value);

	void SetUniform1f(const std::string& name, float value);

	void SetUniform4f(const std::string& name, float v0, float v1, float f2, float f3);


private:
	ShaderProgramSource ParseShader(const std::string& filepath);
	unsigned int CompileShader(unsigned int type, const std::string& source);
	unsigned int CreateShader(const std::string& vertexShader, const std::string& fragmentShader);
	int GetUniformLocation(const std::string& name);
};