AntiAlias not working in OpenGL

[eljeffeg]

The AntiAlias does not work correctly in OpenGL (both FullScreen & SoftFullScreen) smooth() and gl.glEnable(gl.GL_LINE_SMOOTH); have no effect.

import fullscreen.*;
import processing.opengl.*;
import javax.media.opengl.GL;
PGraphicsOpenGL pgl;
GL gl;
FullScreen fs;

void setup(){
  size(300, 300, OPENGL);
  fs = new FullScreen(this);
  hint(DISABLE_OPENGL_2X_SMOOTH);
  hint(ENABLE_OPENGL_2X_SMOOTH);
  fs.enter(); 
  pgl         = (PGraphicsOpenGL) g;
  gl          = pgl.gl;
  gl.glEnable(gl.GL_LINE_SMOOTH);
}

void draw(){
  background(0);
  ellipse(150,150,150,150);
}

[eljeffeg]

This thread may be helpful. http://processing.org/discourse/yabb2/YaBB.pl?num=1250870750

[kritzikratzi]

seems to be a problem with the opengl context (AGAIN!!!) i get the best results by just using: @hint(ENABLE_OPENGL_4X_SMOOTH);@

I've been digging into it for a while, but couldn't really locate the source of the problem. Let's hope this (along with all the other opengl issues) will go away automatically in the next version...

[eljeffeg]

Just wondering if this has made any progress... This is the only drawback I'm having with the library and I'd be ecstatic to see it resolved.

[eljeffeg]

I did try 4x smooth and it did look better than the 2x I was using. However, I'm a bit concerned about the possible performance impact on lower end machines with using 4x, since it applies to the entire scene. With "gl.glEnable(gl.GL_LINE_SMOOTH);" I can selectively enable it for certain portions of the scene. At least that's my thought process... I could be wrong.

[kritzikratzi]

nope, unfortunately no progress yet. the problem is that i haven't even found out why gl.glEnable(gl.GL_LINE_SMOOTH); doesn't work after switching to fullscreen. this might be solvable using a custom glEventListener.

on a sidenote: maybe i explained this already, but when i talk about "this might go away in the next version": i'm playing around with a completely different approach where i never recreate the original sketch context. i only hide the original sketch window, let it draw to the background and copy the results to a new window. this way all the texture-problems, as well as this issue, go away. i'm only worried about performance (esp. with non-gl renderers), haven't done much testing yet...

[eljeffeg]

Thanks for the clarification.. when you said next version, I thought you were referring to Processing (1.10 or something).

[eljeffeg]

Should be fixed with this commit for version 0.98.4 (at least partially - I can get it to work if we order it correctly in the sketch).
http://github.com/jeffg2k/fullscreen-p5/commit/3f020076f0661da56aeb188b56cf16ff84269434

[eljeffeg]

My recent "fix" caused an error and ended up breaking my minimization. However, I found out that if you call the disable hint in between the creating the frame and entering fullscreen, all works well.

fs = new SoftFullScreen(this); hint(DISABLE_OPENGL_2X_SMOOTH); fs.enter();

Perhaps this could still be worked into the code somehow.. but at least we have a workaround.

[kritzikratzi]

interesting. using this, does gl.GL_LINE_SMOOTH work?

[eljeffeg]

Yes.. that's what I use.. but you have to put it in the draw. Taking from the original post. This works:

import fullscreen.*;
import processing.opengl.*;
import javax.media.opengl.GL;
PGraphicsOpenGL pgl;
GL gl;
FullScreen fs;

void setup(){
  size(300, 300, OPENGL);
  fs = new FullScreen(this);
  hint(DISABLE_OPENGL_2X_SMOOTH);
  fs.enter(); 
  pgl         = (PGraphicsOpenGL) g;
  gl          = pgl.gl;
}

void draw(){
  background(0);
  gl.glEnable(gl.GL_LINE_SMOOTH);
  ellipse(150,150,150,150);
}