noSmooth() still does not work in P2D/P3D

[SableRaf]

The issue with noSmooth() not functioning correctly in P2D and P3D has persisted since Issue #5363 which was first reported by @clankill3r in 2018. Several workarounds have been suggested, but the underlying problem remains unresolved in 2025.

See the original thread for more details.

Steps to Reproduce

A minimal example demonstrating the issue:

PGraphics pg;

void setup() {
  size(640, 640, P2D);
  noSmooth();
  pg = createGraphics(32, 32);
  pg.noSmooth();
}

void draw() {
  pg.beginDraw();
  pg.background(128);
  pg.rect(4, 4, 16, 16);
  pg.endDraw();
  image(pg, 0, 0, width, height);
}

[Sumamasonia]

Hi @SableRaf ,

I have been analyzing this issue regarding noSmooth() not working as expected in OpenGL renderers. I've found that the textureSampling was not being updated to POINT within the PGraphicsOpenGL class, which caused scaled textures to remain blurry instead of pixel-perfect.

I would like to propose my changes for this fix. I have already submitted a Pull Request #1427 which addresses this by explicitly setting textureSampling = Texture.POINT inside the noSmooth() method.

I've tested it with a 32x32 texture scaled to a 640x640 P2D canvas, and the edges are now perfectly sharp. I would appreciate it if a maintainer could review my PR and assign this issue to me officially.

Looking forward to your feedback! Thanks.

[catilac]

Thanks for taking a look @Sumamasonia

[Sumamasonia]

Thank you for assigning this to me! I have already submitted the PR (#1427) and verified the fix. Looking forward to your feedback.