Add noise effect to a drawing

Question

I'm in the process of creating a custom view for my android application and would like to add a noise overlay over my drawings.

My drawings are pretty standard, arcs, bezier curves, etc.

What would be the way to go with creating a noise overlay over arbitrary shapes, drawn with canvas?

score 2 · Accepted Answer · answered Aug 09 '11 at 10:29

2

Use a tileable transparent noise png and cover the canvas with it.

answered Aug 09 '11 at 10:29

markthema3

Yes, something like BitmapShader(bitmap, REPEAT, REPEAT). – markthema3 Aug 09 '11 at 10:57
The noise does get applied, but the paint color is not shown, so the color is always the color of noise PNG. – Valentin V Aug 09 '11 at 11:22
Try making the noise itself partially transparent so the color shows through. – markthema3 Aug 09 '11 at 11:50
It's transparent, I figured it out, I needed to apply the colorfilter to the paint. – Valentin V Aug 09 '11 at 11:57
where to find a tileable transparent noise png ? – zeus Nov 15 '16 at 21:41

1 Answers1