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

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

Hello everyone, hi Javier, hi John,

I prepared a new edition of this code:
http://www.gamgi.org/gtk_opengl.tar.gz

The (minor) differences are:

1) added a fourth  parameter to gtk_opengl_create (direct rendering or 
rendering through X);

2) back ported to GTK 2 the colormap simplication that Javier introduced 
in the GTK 3 version. The only difference between GTK2 and GTK3 versions 
of gtk_opengl.c is now this (occurring in several functions):

GTK 2:
Display *xdisplay = gdk_x11_drawable_get_xdisplay (drawable);

GTK 3:
GdkDisplay *display = gdk_window_get_display (drawable);
Display *xdisplay = gdk_x11_display_get_xdisplay (display);

3) Added legal notices (this is a overkill but I am trying to make life 
as simple as possible for everyone): The version for GTK 3 is 
distributed under the licenses simplified BSD or LGPL (users choose). 
The version for GTK 2 is distributed under the simplified BSD. The 
rationale is: the GTK team might prefer the LGPL but BSD can be used 
everywhere, including closed source. The simplified BSD is the simplest 
license I could find (the OpenBSD license). The CC0 seems slightly more 
complex...

4) Javier, I added your name to the copyright notice, as you gave a very 
significant contribution to make this code useful.

5) Everything else are cosmetic changes: updated comments, variable 
names, order of functions

6) As a result this new tarball has the following directories (just 
ignore those you don't want):

gtk3_bsd/
gtk3_lgpl/
gtk2_bsd/
gtk2_glext/

This is also explained in the README.

Regards,
Carlos
> On 23 February 2014 23:49, Carlos Pereira
> <jose carlos pereira ist utl pt>  wrote:
>    
> > Sorry for the delay, here is the code I prepared (it contains all
> > the functions needed to run OpenGL on a GTK drawing area):
> >
> > http://www.gamgi.org/gtk_opengl.tar.gz
> > or:
> > http://www.gamgi.ist.utl.pt/gtk_opengl.tar.gz
> >
> > The code is in a single file, gtk_opengl.c, very easy to read, I think.
> > It has 189 lines of C code only, a good part of it are comments and space
> > lines...
> >
> > I included a directory with two classic examples, distributed by all
> > GtkGLArea and GtkGLExt releases, to show how this code works.
> >
> > I included other directory with the same two examples, this time
> > using GtKGLExt, to make it simpler to compare the two approaches.
> >
> > The code comes with README files and comments, with the most relevant
> > information. A variation of this code has been used since 2010 in a
> > relatively
> > large package without known problems.
> >
> > I want to make it clear that I wrote this code for GTK 2 and the X Window
> > System.
> > There are a few gdk_x11_* functions, included through<gdk/gdkx.h>, that
> > might be handled differently on GTK 3. These changes, if needed, *should* be
> > trivial.
> >      
> I was curious about this and I ported your "library" and examples to
> GTK+3 (basically all the content of the home_made folder)
> On my testing everything compiles and works perfectly fine :)
> Ive uploaded the code to this repository [1] in case you (or anyone)
> are interested
>
> Regards and thanks for your work!
>
> [1] https://gitorious.org/gtkopengl/gtkopengl/source/master:
>