WebGL programs consist of control code written in JavaScript and shader code (GLSL) that is executed on a computer's Graphics Processing Unit (GPU). The Java 3D Tutorial 5-iv Preface to Chapter 5 This document is one part of a tutorial on using the Java 3D API. Package de. import java.io.FileOutputStream import import import import import import import import import import import import import import import .PdfPCell import .PdfPTable import . WebGL enables web content to use an API based on OpenGL ES 2.0 to perform 2D and 3D rendering in an HTML canvas in browsers that support it without the use of plug-ins.