View source for FBObject

==FrameBuffer Object (FBO)==

    package com.jogamp.opengl;

===Creating FBO===
    final FBObject fbo = new FBObject(); // Create FrameBuffer
    final GL2ES2 gl = GLContext.getCurrentGL().getGL2ES2();
    fbo.reset(gl, width, height); // int width, height - size of FBO, can be resized with the same call
    fbo.attachTexture2D(gl, 0, true); // Create GL_TEXTURE_2D texture which can be used as sampler2D at the shader code
    // Created texture will be bound to FBO's GL_COLOR_ATTACHMENT0 (see the second parameter 0)
    fbo.attachRenderbuffer(gl, Attachment.Type.DEPTH, 32); // Create depth buffer (if required)
    fbo.unbind(gl); // Unbind FrameBuffer (You will probably want to make bind() - render - unbind() loop later on)

===Render to FBO===
    fbo.bind(gl);
    // Render scene as usual
    fbo.unbind(gl);
Note: calls to FBObject.use()/FBObject.unuse() will unbind current buffer

===Render from FBO to another FBO===
Imagine we have 2 FBO, source and target. Source FBO must have TextureAttachment (created with attachTexture2D(), for example)
    FBObject source;
    FBObject target;

Using low-level texture binding:
    final TextureAttachment tex0 = (TextureAttachment) source.getColorbuffer(0);
    target.bind(gl); // Starting rendering to target FBO
    gl.glActiveTexture(GL2.GL_TEXTURE0);
    gl.glEnable(GL2.GL_TEXTURE_2D);
    gl.glBindTexture(GL2.GL_TEXTURE_2D, tex0.getName()); // Binding source FBO's TextureAttachment as GL_TEXTURE_2D
    // Here you can render something using source texture as GL_TEXTURE0
    // For example, you can enable shader with some filter, which makes use of sampler2D and render a fullscreen quad. 
    target.unbind(gl); // Unbind FBO

===Render from FBO to screen===
    final TextureAttachment tex0 = (TextureAttachment) source.getColorbuffer(0);
    gl.glActiveTexture(GL2.GL_TEXTURE0);
    gl.glEnable(GL2.GL_TEXTURE_2D);
    gl.glBindTexture(GL2.GL_TEXTURE_2D, tex0.getName()); // Binding source FBO's TextureAttachment as GL_TEXTURE_2D
    // Here you can just render a fullscreen quad to show FBO content, or do something more exciting