bug#69782: [PATCH] Fringe bitmaps should respect alpha-background

[Nate Sandy <nsan@posteo.de>]

Po Lu via "Bug reports for GNU Emacs, the Swiss army knife of text
editors" <bug-gnu-emacs@gnu.org> writes:

> Nate Sandy <nsan@posteo.de> writes:
>
>> /* Define to 1 if XRender is available. */
>> /* #undef HAVE_XRENDER */
>
> XRender is not available, without which Emacs cannot detect a suitable
> 32-bit visual.  I suggest installing the development packages for
> XRender.

Thanks. After installing XRender, I see `#define HAVE_XRENDER 1` in
src/config.h. However, trying to start Emacs now with `src/emacs -q -xrm
'Emacs.visualClass: TrueColor-32'` results in a crash and the following
message:

    X protocol error: BadMatch (invalid parameter attributes) on protocol request 70
    Serial no: 674
    Failing resource ID (if any): 0x800038
    Minor code: 0
    This is a bug!  Please report this to bug-gnu-emacs@gnu.org!

This happens with both of the configurations I mentioned earlier, and
with Emacs 29.2 as well. Starting Emacs without passing those X
Resources results in (x-display-planes) still returning 24, so the
original problem still stands.