change anti-aliasing(AA) option in cairocffi for text

By default, cairocffi will apply AA. If you want to disable or finetune the AA option when writing text, then check out the example code.

import cairocffi as cairo

surface = cairo.ImageSurface(cairo.FORMAT_RGB24, 50, 50)
context = cairo.Context(surface)

# create white background
context.set_source_rgb(1,1,1)
context.paint()

# preparing to write text
context.move_to(5,45)
context.set_font_size(40)
context.set_source_rgb(0,0,0)

# changing font options which contains AA options
current_fontoption = context.get_font_options()
current_fontoption.set_antialias(cairo.ANTIALIAS_NONE)
context.set_font_options(current_fontoption)

# writing 'a'
context.show_text("a")

surface.write_to_png("output.png")

Here is a no-AA image and a default AA settings image.

for doc on AA options, check here.