Re: Mac Retian and OpenGL

On Sun, 11 Jan 2026 21:06:00 -0800 (PST) Zhipeng Shi wrote:

ZS>     I'm using wxGLCanvas to render OpenGL on a Retina display of a Mac. 
ZS> During rendering, I have to use glViewport(0, 0, GetContentScaleFactor() * 
ZS> width, GetContentScaleFactor() * height) to achieve full-screen rendering, 
ZS> instead of rendering only in the bottom-left quarter of the area.

 This is correct, glViewport() requires physical pixels, while wxWidgets
API works (with some exceptions) with logical pixels.

ZS>     However, when I want to use pick to select a certain rendering unit, 
ZS> wxGetMousePosition() returns physical coordinates.

 This looks like a bug, it should return logical coordinates.

ZS>     My Mac version is 26.2, and the wxWidgets version is 3.2.9.

 Please check if wxGetMousePosition() works correctly with 3.3.1. If it
does, we may need to backport some fix from 3.3 into 3.2. And if it
doesn't, we still need to fix this.

 Thanks,
VZ

-- 
TT-Solutions: wxWidgets consultancy and technical support
              https://www.tt-solutions.com/

-----BEGIN PGP SIGNATURE-----

iF0EABECAB0WIQQx+vLQdOwioQqkxtoG6kHeT2wehgUCaWUS2QAKCRAG6kHeT2we
hvgYAJ9xCBXrBUSuPWpV7pyKYPglezRbHACgoqEShG3dkIw7SRNsyDcyOoKUIuA=
=hdSD
-----END PGP SIGNATURE-----