bug#18818: Incorrect font weight in dark background, Emacs 24.4 on Mac OS X 10.10

[Alan Third]

Sun Yijiang <sunyijiang@gmail.com> writes:

> Step by step:
>
> 1) Mac OS X 10.10 Yosemite, Xcode 6.1
> 2) Compile GNU Emacs 24.4 with ./configure --with-ns && make && make install
> 3) Make a clean run: /Applications/Emacs.app/Contents/MacOS/Emacs -q
> 4) In *scratch* buffer, run these line-by-line (with C-x C-e)
>
> (set-default-font "-*-Monaco-bold-normal-normal-*-*-*-*-*-m-0-iso10646-1")
> (set-default-font "-*-Monaco-normal-normal-normal-*-*-*-*-*-m-0-iso10646-1")
>
> (set-foreground-color "#FFFFFF")
> (set-background-color "#222222")
>
> (set-default-font "-*-Monaco-bold-normal-normal-*-*-*-*-*-m-0-iso10646-1")
> (set-default-font "-*-Monaco-normal-normal-normal-*-*-*-*-*-m-0-iso10646-1")
>
> Screenshots after each step are attached.  It's clear that in a dark
> background, bold and normal texts are flipped.

I can confirm this in Emacs 25. It looks like it's only synthetic bolds
that are displayed incorrectly, faces with proper bold fonts, like
Menlo, are displayed correctly.

Looks like the Mac port behaves identically.

-- 
Alan Third