[Bug]: backend_cairo set_context() is broken for cairocffi #26523

Bug summary

Saving an SVG via cairocffi this way worked in 3.5.2, but fails in 3.6.x - 3.7.2 .
I see though that it's just a cairocffi issue; switching to pycairo seems to work so for now I will give that a try.

Code for reproduction

import sys
import matplotlib
from matplotlib import pyplot as plt


def main(argv):
    matplotlib.use("cairo")
    fig, axs = plt.subplots(1, 8, figsize=(8.0, 4.0), facecolor="w", edgecolor="k")

    dump_to = "whatever.svg"
    plt.savefig(dump_to)


if __name__ == '__main__':
    main(sys.argv)

Actual outcome

  File ".../.venv/lib/python3.11/site-packages/matplotlib/backends/backend_cairo.py", line 484, in _save
    self._renderer.set_context(cairo.Context(surface))
  File ".../.venv/lib/python3.11/site-packages/matplotlib/backends/backend_cairo.py", line 99, in set_context
    size = rect.width, rect.height
           ^^^^^^^^^^
AttributeError: 'tuple' object has no attribute 'width'

Expected outcome

savefig should save the fig

Additional information

this is with:
matplotlib==3.7.2
cairocffi==1.6.1
and the brew install of cairo 1.16.0_5

Operating system

macOS

Matplotlib Version

3.7.2

Matplotlib Backend

cairo

Python version

3.11.4

Jupyter version

No response

Installation

pip