Hi Steve,
Here's the configuration that I've been using...
OPENGL_PROFILE=GLCORE
OSG_GL_CONTEXT_VERSION=4.6
OpenGL_GL_PREFERENCE=GLVND
With a clean CMAKE config, it will set the defaults... (purge all the
OSG_xxx items if they already have values assigned)
OPENGL_HEADER1=#include <GL/glcorearb.h>
OSG_GL1_AVAILABLE=OFF
OSG_GL2_AVAILABLE=OFF
OSG_GL3_AVAILABLE=ON
OSG_GL_DISPLAYLISTS_AVAILABLE=OFF
OSG_GL_FIXED_FUNCTION_AVAILABLE=OFF
etc...
Scott
On 4/5/21 12:20 PM, Hardy Family wrote:
The GtkGLArea widget in GTK3.24 requires GLCORE profile, so the
standard Ubuntu/Debian openscenegraph package will not work as it is
compiled with GL2 profile. Unfortunately, my application uses Gtk so
I am now forced to get it working. So I loaded the source package
(openscenegraph 3.6.4) and tried to build it.
First, with default configuration, except added
SET(OpenGL_GL_PREFERENCE "GLVND")
to stop the warning about having multiple library choices. This uses
GL2 profile, and after building, osgviewer works fine.
Next, selected OPENGL_PROFILE "GLCORE" and also turned off all
"available" except OSG_GL3_AVAILABLE. Make clean then make again, and
now osgviewer only shows an empty scene for the same test file.
Is there something else I have to do in the build? (I'm not yet even
to the point of testing with Gtk).
Interestingly, on the Raspberry Pi 4, which also runs Gtk3.24, my code
is working fine with the standard distribution package, so I know it
can be done. On the Pi, OSG is version 3.2.3.
I don't mind a custom solution for this. Normally we don't want to
stray too far from standard distro, but our application is a machine
controller so we supply and maintain the PC as well.
Regards,
Steve
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