This document provides a reference listing of OpenGL functions and constants. It includes over 150 functions related to drawing, shaders, textures, buffers and more. The functions listed take parameters and have names indicating their purpose, such as glDrawArrays, glGetString, glGetUniformLocation and glDeleteTextures. Constants are also included that are used as parameters for functions, such as GL_ARRAY_BUFFER and GL_FRAGMENT_SHADER.