How to disable anti-aliasing in Manim?

[adam-whittaker]

I am trying to code a color-based filter that will be applied on top of manim renders, but it seems like the manim anti-aliasing is messing up my color detection.

[nikolajmunk]

From a quick look through the codebase, it looks like the Cairo renderer exposes its antialias setting through Context.set_antialias. Here's a quick proof of concept.

from manim import *
import cairo
old_get_ctx = Camera.get_cairo_context
def get_cairo_context(self, pixel_array: np.ndarray):
    ctx = old_get_ctx(self, pixel_array)
    ctx.set_antialias(cairo.Antialias.NONE)
    return ctx

Camera.get_cairo_context = get_cairo_context

class AntialiasTest(Scene):
    def construct(self):
        mob = Text("Hello World").scale(3)
        self.add(mob)

... which results in this image: