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Respect antialiasing settings in cairo backends as well. #19719

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Merged
merged 1 commit into from
Mar 17, 2021
Merged

Respect antialiasing settings in cairo backends as well. #19719

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14 changes: 10 additions & 4 deletions lib/matplotlib/backends/backend_cairo.py
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Original file line number Diff line number Diff line change
Expand Up @@ -25,6 +25,7 @@
"cairo backend requires that pycairo>=1.11.0 or cairocffi "
"is installed") from err

import matplotlib as mpl
from .. import _api, cbook, font_manager
from matplotlib.backend_bases import (
_Backend, _check_savefig_extra_args, FigureCanvasBase, FigureManagerBase,
Expand Down Expand Up @@ -244,9 +245,14 @@ def draw_text(self, gc, x, y, s, prop, angle, ismath=False, mtext=None):
ctx.new_path()
ctx.move_to(x, y)

ctx.select_font_face(*_cairo_font_args_from_font_prop(prop))
ctx.save()
ctx.select_font_face(*_cairo_font_args_from_font_prop(prop))
ctx.set_font_size(prop.get_size_in_points() * self.dpi / 72)
opts = cairo.FontOptions()
opts.set_antialias(
cairo.Antialias.DEFAULT if mpl.rcParams["text.antialiased"]
else cairo.Antialias.NONE)
ctx.set_font_options(opts)
if angle:
ctx.rotate(np.deg2rad(-angle))
ctx.show_text(s)
Expand Down Expand Up @@ -349,9 +355,9 @@ def set_alpha(self, alpha):
else:
self.ctx.set_source_rgba(rgb[0], rgb[1], rgb[2], rgb[3])

# def set_antialiased(self, b):
# cairo has many antialiasing modes, we need to pick one for True and
# one for False.
def set_antialiased(self, b):
self.ctx.set_antialias(
cairo.Antialias.DEFAULT if b else cairo.Antialias.NONE)

def set_capstyle(self, cs):
self.ctx.set_line_cap(_api.check_getitem(self._capd, capstyle=cs))
Expand Down
2 changes: 1 addition & 1 deletion matplotlibrc.template
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Original file line number Diff line number Diff line change
Expand Up @@ -326,7 +326,7 @@
# unchanged. Set to 6 to obtain previous behavior. Values
# other than 0 or 6 have no defined meaning.
#text.antialiased: True # If True (default), the text will be antialiased.
# This only affects the Agg backend.
# This only affects raster outputs.

## The following settings allow you to select the fonts in math mode.
#mathtext.fontset: dejavusans # Should be 'dejavusans' (default),
Expand Down