Re: [GtkGLExt] Fwd: Re: GtkGlExt & GTK3

[Carlos Pereira <jose carlos pereira ist utl pt>]

> gtk 3 does support OpenGL. With clutter and cogl you can integrate plain
> OpenGL into your application. Maybe it's not as smooth as as Qt's OpenGl
> widget, but it is better to use than this abandoned GtkGlExt.
>    
I am sorry this is just not true. As far as I can see Gtk 3 does not 
support OpenGL. Like Gtk 2. Like Gtk 1.

This is so painfully obvious that it really hurts. Supporting OpenGL is 
not to build a new API, a new toolkit, a new software layer between user 
code and OpenGL (or even worse, to write a poor replacement for OpenGL).

I have been in the Gtk developers list since 1999, every 5 years we come 
again to this issue, to no avail. After almost 15 years watching Gtk 
developers telling nonsense about OpenGL, I came to the conclusion that 
Gtk developers don't even understand the issue. It is mildly offensive 
to ask OpenGL programmers to throw away their optimized OpenGL code and 
replace it by some clutter API that translates to... OpenGL code!

There are hundreds of books about OpenGL, please buy one and learn 
OpenGL before posting these ridiculous statements.

All that is needed to bridge Gtk 2 and OpenGL under X11 are about 250 
lines of C code. I know because I distribute two versions of my package, 
one uses GtkGLExt, the other uses my own code. If you are really serious 
about this, I can point you to these packages and explain in detail the 
relevant C code. And I am not even an expert, I came to this code 
reading all I could about this...

We have been asking for 15 years to include something like these 250 
lines of code, that is ALL that is needed to bridge GtK and OpenGL (some 
of this code is specific for the X Window System - for Wayland, Windows 
and Mac OS X you will need some slightly different code). Even these 250 
lines, many are comments and space lines... This is so ridiculous...

Carlos