shader.cpp

#include "shader.h"

Shader::Shader(const char* vertexShaderPath, const char* fragmentShaderPath) {
	std::string vertexCode;
	std::string fragmentCode;
	std::ifstream vShaderFile;
	std::ifstream fShaderFile;
	vShaderFile.exceptions(std::ifstream::failbit | std::ifstream::badbit);
	fShaderFile.exceptions(std::ifstream::failbit | std::ifstream::badbit);
	try {
		vShaderFile.open(vertexShaderPath);
		fShaderFile.open(fragmentShaderPath);
		std::stringstream vShaderStream, fShaderStream;
		// read file's buffer contents into streams
		vShaderStream << vShaderFile.rdbuf();
		fShaderStream << fShaderFile.rdbuf();
		vShaderFile.close();
		fShaderFile.close();
		vertexCode = vShaderStream.str();
		fragmentCode = fShaderStream.str();
	}
	catch(std::ifstream::failure& e){
		std::cout<< "ERROR::SHADER::FILE_NOT_SUCCESFULLY_READ" << std::endl;
	}
	const char* vShaderCode = vertexCode.c_str();
	const char* fShaderCode = fragmentCode.c_str();
	unsigned int vertex, fragment;
	vertex = glCreateShader(GL_VERTEX_SHADER);
	glShaderSource(vertex, 1, &vShaderCode, NULL);
	glCompileShader(vertex);
	checkCompileError(vertex, "VERTEX");
	fragment = glCreateShader(GL_FRAGMENT_SHADER);
	glShaderSource(fragment, 1, &fShaderCode, NULL);
	glCompileShader(fragment);
	checkCompileError(fragment, "FRAGMENT");
	ID = glCreateProgram();
	glAttachShader(ID, vertex);
	glAttachShader(ID, fragment);
	glLinkProgram(ID);
	checkCompileError(ID, "PROGRAM");
	glDeleteShader(vertex);
	glDeleteShader(fragment);


}
Shader::~Shader() {
	glDeleteProgram(ID);
}