Bug summary

All's in the title.

Code for reproduction

from pylab import *
gca().inset_axes([.1, .2, .3, .4]); savefig("/tmp/test.png", transparent=True)

# then display /tmp/test.png with a viewer that distinguishes between white and transparent: the inset axes is not transparent.

Actual outcome

Inset is not transparent.

Expected outcome

Inset is transparent (... well, admittedly I guess whether one wants this or not may be figure-dependent?) (mildly relatedly, see also #10023.)

Additional information

No response

Operating system

arch linux

Matplotlib Version

3.6.0.dev1856+ga2ddfc0c0f

Matplotlib Backend

agg

Python version

310

Jupyter version

ENOSUCHLIB

Installation

git checkout