get window width height glfw
#include <GLFW/glfw3.h>
int main()
{
int width, height;
GLFWwindow* window;
glfwInit();
window = glfwCreateWindow(640, 480, "Title", NULL, NULL);
glfwGetFramebufferSize(window, &width, &height);
while (!glfwWindowShouldClose(window))
{
// Render here
glfwSwapBuffers(window);
glfwPollEvents();
}
glfwTerminate();
return 0;
}