Hi Benhem!
I want nice big fat pixels too.
Would love some details!
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http://draconiansolo.wordpress.com/

I'm able to scale PImages with no interpolation in 1.5.1 using the JAVA2D (default) renderer and the image(...) method. I thought I saw something somewhere about a method to set interpolation in 2.0x but I may be mistaken.

I've tested the code below and it (still) works in Processing 2.0b7.

Code Example

1. PImage img = loadImage("http://dddi.org/bartlett/BIS/University_of_Chicago/tree_green.png");
2.  
3. void setup() {
4.   size(500, 500, P2D);
5.   ((PGraphicsOpenGL)g).textureSampling(3);
6. }
7.  
8. void draw() {
9.   background(255);
10.   image(img, 0, 0, width, height);
11. }

So it's been years of me not getting what was going on with this stuff.
My problem was that I was creating an offscreen PGraphics and for some weird reason the PGraphics completely ignores the texture sampling instruction, resulting in filtering issues, depression and periodic episodes of existentialism.

eg:

1. PGraphics buffer;
2. void setup() {
3.   size(320, 240, OPENGL);
4.   noSmooth();
5.   hint(DISABLE_TEXTURE_MIPMAPS);
6.   ((PGraphicsOpenGL)g).textureSampling(3);
7.   buffer=createGraphics(width/8, height/8, P3D);
8.   buffer.noSmooth();
9. }
10. void draw() {
11.   buffer.beginDraw();
12.   buffer.background(0);
13.   buffer.stroke(255);
14.   buffer.line(0, 0, buffer.width, buffer.height);
15.   buffer.endDraw();
16.   image(buffer, 0, 0, width, height);
17.   //processing!!! Y U SO BROKEN???? :(
18. }

At some point (I can't find the source of this and maybe it was a dream) Andreas mentioned something about being an issue with the CreatGraphics() function ignoring the texture sampling.
So I figured that maybe grabbing the image from the buffer using get() would do the trick

1. PGraphics buffer;
2. void setup() {
3.   size(320, 240, OPENGL);
4.   noSmooth();
5.   hint(DISABLE_TEXTURE_MIPMAPS);
6.   ((PGraphicsOpenGL)g).textureSampling(3);
7.   buffer=createGraphics(width/8, height/8, P3D);
8.   buffer.noSmooth();
9. }
10. void draw() {
11.   buffer.beginDraw();
12.   buffer.background(0);
13.   buffer.stroke(255);
14.   buffer.line(0, 0, buffer.width, buffer.height);
15.   buffer.endDraw();
16.   image(buffer.get(), 0, 0, width, height);
17.   //BOOM!
18. }

So that's it. It works! no more excuses for my lazyness.
Now I feel happier and less willing to question the nature of life, but we'll know that deep inside, something will be broken forever.

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http://draconiansolo.wordpress.com/