Following Fl_Tile with two OpenGL subwindows (one in a group), creates refresh issues on Windows and macOS #737

I found out in my program that if I compiled FLTK Debug on macOS, there would be no red flickering on, at least, one of the windows with FL_DOUBLE and the other window would also not flicker if this second window did not use FL_DOUBLE.  This had solved my issues.

The tileGL.cxx sample program the Manolo provided would not flicker on any windows on macOS if the windows were *not* created with FL_DOUBLE.

Now, this commit:

81615bbe0 Fix Fl_Cocoa_Gl_Window_Driver::resize()

Breaks that behavior and makes the FL_DOUBLE GL Window flicker on resize.

I’ll see in the coming week if I can provide a simple example (besides tileGL.cxx) so that it can be tested on both Debug and Release builds.


—
Gonzalo Garramuno
ggarra13@gmail.com




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