bug#21415: 25.0.50; Emacs Trunk -- pixelwise width/height for x-create-frame

[Anders Lindgren]

Martin,

I just hope I didn't confuse you with the "screen coordinates" stuff. From an Emacs users point of view (and from the point of view of elisp) the UPPER LEFT corner is 0x0 -- as it is on every other system. The fact that OS X see everything from the lower left corner is handled by internally by "nsterm.m". Hence, there is no need to mention this in the manual.

"Flipping" mean that the coordinate system is mirrored, in some way. I guess it could be used to set the upper left as the origin, but I'm not that into OS X to tell you how that is done and what other consequences that would have for the Emacs code base.

Unfortunately, I have no idea why it worked in 24.5 and why it didn't in 25. There has been a lot of changes along the way, so one would have to inspect each one to see what changed, and why.

/ Anders

On Sun, Sep 20, 2015 at 10:44 AM, martin rudalics <rudalics@gmx.at> wrote:

> I've attached the patch, sorry for posting it in the mail.

Thank you.  Keith please try it.  If it fixes all remaining issues I'll
try to commit everything we have now next week.

> You can read more about "screen coordinates" here:
>
> https://developer.apple.com/library/ios/documentation/General/Conceptual/Devpedia-CocoaApp/CoordinateSystem.html

Thanks.  I'm slightly confused, at least - I have no idea what flipping
means.  Can you have a short look at the section "Frame Geometry" in the
Elisp manual?  Maybe I should mention something about this issue there.

And do you have any idea why this apparently worked in Emacs 24.5 and
doesn't work with present master/trunk?

martin