import processing.opengl.*;
import controlP5.*;
import javax.media.opengl.*;

ControlP5 controlP5;
PGraphicsOpenGL pgl;
GL gl;
PImage img_pot;
PImage img_npot;

void setup()
{
  size( 640, 360, OPENGL );
  controlP5 = new ControlP5( this );
  controlP5.setAutoInitialization( false );
  controlP5.setAutoDraw( false );
  controlP5.Button button = controlP5.addButton( "THIS BUTTON LABEL GETS A STRANGE BLUR", 0.0, 10, 10, 200, 10 );
  img_pot = loadImage( "C:\\Program Files\\processing-1.0.8\\examples\\3D\\Textures\\TextureCube\\data\\uvtex.jpg" );
  img_npot = loadImage( "C:\\Program Files\\processing-1.0.8\\examples\\3D\\Image\\Explode\\data\\eames.jpg" );
}

void draw()
{
  pgl = (PGraphicsOpenGL) g;  // g may change
  gl = pgl.beginGL();         // always use the GL object returned by pgl
  pgl.endGL();
  background(0);
  // you can notice the problem easily here
  controlP5.draw();
  // POT texture - doesnt suffer this problem - the following is 256 x 256
  // afaik POT texture doesnt have to be a square, i noticed that a 256x128 texture gets blurred too
  image( img_pot, 10, 30 );
  // NPOT texture - this gets blurred, compare this in photoshop using "difference" with the original one
  // it's much more noticeable when the texture contains Text or sharp details
  image( img_npot, 276, 30 );
}