ShaderManager.cpp

#include "ShaderManager.h"
#include <fstream>
#include <sstream>
#include <iostream>

std::string readShaderFile(const char* filename) {
    std::ifstream file(filename);
    std::stringstream buffer;
    buffer << file.rdbuf();
    return buffer.str();
}

GLuint compileShader(GLenum shaderType, const std::string& source) {
    GLuint shader = glCreateShader(shaderType);
    const char* sourceCStr = source.c_str();
    glShaderSource(shader, 1, &sourceCStr, nullptr);
    glCompileShader(shader);
    return shader;
}

GLuint createShaderProgram(const char* vertexShaderPath, const char* fragmentShaderPath) {
    std::string vertexShaderSource = readShaderFile(vertexShaderPath);
    std::string fragmentShaderSource = readShaderFile(fragmentShaderPath);
    GLuint vertexShader = compileShader(GL_VERTEX_SHADER, vertexShaderSource);
    GLuint fragmentShader = compileShader(GL_FRAGMENT_SHADER, fragmentShaderSource);
    GLuint shaderProgram = glCreateProgram();
    glAttachShader(shaderProgram, vertexShader);
    glAttachShader(shaderProgram, fragmentShader);
    glLinkProgram(shaderProgram);
    glDeleteShader(vertexShader);
    glDeleteShader(fragmentShader);

    return shaderProgram;
}