ShaderProgram.hpp

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#pragma once
 
#include <glad/glad.h>
#include <glm/glm.hpp>
 
#include <memory>
#include <stack>
#include <string>
#include <unordered_map>
 
#include <AssetManager/Shader.hpp>
 
namespace shkyera {
 
class ShaderProgram {
 public:
  ShaderProgram();
  ~ShaderProgram();
 
  void attachShader(const std::shared_ptr<Shader>& shader);
 
  void link();
 
  void use();
  void stopUsing();
 
  void setUniform(const std::string& name, int value);
  void setUniform(const std::string& name, float value);
  void setUniform(const std::string& name, const glm::vec2& value);
  void setUniform(const std::string& name, const glm::vec3& value);
  void setUniform(const std::string& name, const glm::mat4& value);
 
 private:
  bool isInUse();
  GLint getUniformLocation(const std::string& name);
 
  GLuint _id;  // OpenGL shader program ID
  std::unordered_map<std::string, GLint> _uniformLocationCache;
 
  inline static std::stack<GLuint> _shadersInUse{};
};
 
class UseShader {
 public:
  UseShader(ShaderProgram& shaderProgram);
  ~UseShader();
 
 private:
  ShaderProgram& mShaderProgram;
};
 
}  // namespace shkyera