So my problem is that When I make a Shader variable and I swap between mainmenustate and gamestate really fast I notice my memory usage increase alot but as soon I switch my Shader varaible into a pointer memory usage dont increase until I put cameraShader = new Shader(); I tried deleting the cameraShader but memory usage still increase
BAREBONE EXAMPLE
#include "glfw.h"
#include "glad.h"
#include "Shader.h"
class State{
private:
Shader* cameraShader;
public:
State(glfwwindow* window, std::stack<State*>* states){
cameraShader("example.vs", "example.fs");
}
virtual ~State(){
delete cameraShader;
}
}
void update(float& dt){
}
void render(){
}
main
#include "State.h"
#include "stdafx.h"
#include "Game.h"
void Game::framebufferCallback(GLFWwindow* window, int width, int height)
{
glViewport(0, 0, width, height);
}
Game::Game()
:previousTime(0.f), dt(0.f)
{
//Variables
const unsigned int width = 854, height = 480;
//Initiating GLFW Window
glfwInit();
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 6);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
#ifdef _APPLE_
glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
#endif
//Creating a GLFW window
window = glfwCreateWindow(width, height, "EXAMPLE", NULL, NULL);
//Checking if Window was initiated
if (window == NULL) {
std::cout << "GLFW FAILED TO INITIATE WINDOW!n";
glfwTerminate();
}
glfwMakeContextCurrent(window);
//Setting Window's aspect ratio
glfwSetWindowAspectRatio(window, 16, 9);
//Centering Window
int windowWidth, windowHeight;
glfwGetWindowSize(window, &windowWidth, &windowHeight);
const GLFWvidmode* mode = glfwGetVideoMode(glfwGetPrimaryMonitor());
glfwSetWindowPos(window, mode->width / 2 - windowWidth / 2, mode->height /
2 - windowHeight / 2);
//Checking if Glad was initiated
if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress)) {
std::cout << "GLAD FAILED TO BE INITIATEDn";
}
//Enabling OpenGl features
glEnable(GL_CULL_FACE);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_BLEND);
glEnable(GL_STENCIL_TEST);
glEnable(GL_DEPTH_TEST);
stbi_set_flip_vertically_on_load(true);
//glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
//Setting-Up Viewport
glfwSetFramebufferSizeCallback(window, framebufferCallback);
//Intitiating MainMenu
states.push(new MainMenuState(window, &states));
}
Game::~Game()
{
}
int Game::glfwGetWindowShouldClose()
{
return glfwWindowShouldClose(window);
}
void Game::processWindowEvents()
{
//Calculating Deltatime
double currentTime = glfwGetTime();
dt = currentTime - previousTime;
previousTime = currentTime;
}
void Game::update()
{
processWindowEvents();
if (!states.empty()) {
states.top()->update(dt);
if (states.top()->getQuit()) {
states.top()->endstate();
delete states.top();
states.pop();
std::cout << "States has been deletedn";
}
}
else {
glfwSetWindowShouldClose(window, GL_TRUE);
}
}
void Game::render()
{
//Clearing display
glClearColor(0.15f, .45f, .60f, 1.f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
if (!states.empty()) {
states.top()->render();
}
glfwSwapBuffers(window);
glfwPollEvents();
}
Shader class
#ifndef SHADER_H
#define SHADER_H
#include <glad/glad.h>
#include <glm/glm.hpp>
#include <string>
#include <fstream>
#include <sstream>
#include <iostream>
class Shader
{
public:
unsigned int ID;
Shader(const char* vertexPath, const char* fragmentPath, const char* geometryPath = nullptr)
{
// 1. retrieve the vertex/fragment source code from filePath
std::string vertexCode;
std::string fragmentCode;
std::string geometryCode;
std::ifstream vShaderFile;
std::ifstream fShaderFile;
std::ifstream gShaderFile;
// ensure ifstream objects can throw exceptions:
vShaderFile.exceptions (std::ifstream::failbit | std::ifstream::badbit);
fShaderFile.exceptions (std::ifstream::failbit | std::ifstream::badbit);
gShaderFile.exceptions (std::ifstream::failbit | std::ifstream::badbit);
try
{
// open files
vShaderFile.open(vertexPath);
fShaderFile.open(fragmentPath);
std::stringstream vShaderStream, fShaderStream;
// read file's buffer contents into streams
vShaderStream << vShaderFile.rdbuf();
fShaderStream << fShaderFile.rdbuf();
// close file handlers
vShaderFile.close();
fShaderFile.close();
// convert stream into string
vertexCode = vShaderStream.str();
fragmentCode = fShaderStream.str();
// if geometry shader path is present, also load a geometry shader
if(geometryPath != nullptr)
{
gShaderFile.open(geometryPath);
std::stringstream gShaderStream;
gShaderStream << gShaderFile.rdbuf();
gShaderFile.close();
geometryCode = gShaderStream.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();
// 2. compile shaders
unsigned int vertex, fragment;
// vertex shader
vertex = glCreateShader(GL_VERTEX_SHADER);
glShaderSource(vertex, 1, &vShaderCode, NULL);
glCompileShader(vertex);
checkCompileErrors(vertex, "VERTEX");
// fragment Shader
fragment = glCreateShader(GL_FRAGMENT_SHADER);
glShaderSource(fragment, 1, &fShaderCode, NULL);
glCompileShader(fragment);
checkCompileErrors(fragment, "FRAGMENT");
// if geometry shader is given, compile geometry shader
unsigned int geometry;
if(geometryPath != nullptr)
{
const char * gShaderCode = geometryCode.c_str();
geometry = glCreateShader(GL_GEOMETRY_SHADER);
glShaderSource(geometry, 1, &gShaderCode, NULL);
glCompileShader(geometry);
checkCompileErrors(geometry, "GEOMETRY");
}
// shader Program
ID = glCreateProgram();
glAttachShader(ID, vertex);
glAttachShader(ID, fragment);
if(geometryPath != nullptr)
glAttachShader(ID, geometry);
glLinkProgram(ID);
checkCompileErrors(ID, "PROGRAM");
// delete the shaders as they're linked into our program now and no longer necessery
glDeleteShader(vertex);
glDeleteShader(fragment);
if(geometryPath != nullptr)
glDeleteShader(geometry);
}
// activate the shader
// ------------------------------------------------------------------------
void use()
{
glUseProgram(ID);
}
// utility uniform functions
// ------------------------------------------------------------------------
void setBool(const std::string &name, bool value) const
{
glUniform1i(glGetUniformLocation(ID, name.c_str()), (int)value);
}
// ------------------------------------------------------------------------
void setInt(const std::string &name, int value) const
{
glUniform1i(glGetUniformLocation(ID, name.c_str()), value);
}
// ------------------------------------------------------------------------
void setFloat(const std::string &name, float value) const
{
glUniform1f(glGetUniformLocation(ID, name.c_str()), value);
}
// ------------------------------------------------------------------------
void setVec2(const std::string &name, const glm::vec2 &value) const
{
glUniform2fv(glGetUniformLocation(ID, name.c_str()), 1, &value(0));
}
void setVec2(const std::string &name, float x, float y) const
{
glUniform2f(glGetUniformLocation(ID, name.c_str()), x, y);
}
// ------------------------------------------------------------------------
void setVec3(const std::string &name, const glm::vec3 &value) const
{
glUniform3fv(glGetUniformLocation(ID, name.c_str()), 1, &value(0));
}
void setVec3(const std::string &name, float x, float y, float z) const
{
glUniform3f(glGetUniformLocation(ID, name.c_str()), x, y, z);
}
// ------------------------------------------------------------------------
void setVec4(const std::string &name, const glm::vec4 &value) const
{
glUniform4fv(glGetUniformLocation(ID, name.c_str()), 1, &value(0));
}
void setVec4(const std::string &name, float x, float y, float z, float w)
{
glUniform4f(glGetUniformLocation(ID, name.c_str()), x, y, z, w);
}
// ------------------------------------------------------------------------
void setMat2(const std::string &name, const glm::mat2 &mat) const
{
glUniformMatrix2fv(glGetUniformLocation(ID, name.c_str()), 1, GL_FALSE, &mat(0)(0));
}
// ------------------------------------------------------------------------
void setMat3(const std::string &name, const glm::mat3 &mat) const
{
glUniformMatrix3fv(glGetUniformLocation(ID, name.c_str()), 1, GL_FALSE, &mat(0)(0));
}
// ------------------------------------------------------------------------
void setMat4(const std::string &name, const glm::mat4 &mat) const
{
glUniformMatrix4fv(glGetUniformLocation(ID, name.c_str()), 1, GL_FALSE, &mat(0)(0));
}
private:
// utility function for checking shader compilation/linking errors.
// ------------------------------------------------------------------------
void checkCompileErrors(GLuint shader, std::string type)
{
GLint success;
GLchar infoLog(1024);
if(type != "PROGRAM")
{
glGetShaderiv(shader, GL_COMPILE_STATUS, &success);
if(!success)
{
glGetShaderInfoLog(shader, 1024, NULL, infoLog);
std::cout << "ERROR::SHADER_COMPILATION_ERROR of type: " << type << "n" << infoLog;
}
}
else
{
glGetProgramiv(shader, GL_LINK_STATUS, &success);
if(!success)
{
glGetProgramInfoLog(shader, 1024, NULL, infoLog);
std::cout << "ERROR::PROGRAM_LINKING_ERROR of type: " << type << "n" << infoLog;
}
}
}
};
#endif
