Hi,
that's a typical error when working with high-resolution (retina)
displays. The issue here is that on the high-resolution devices, the UI
operates with a virtual pixel size that is smaller than the real number
of pixels on the device. For example, you get coordinates from 0 to 2048
while the real device resolution if 4096 pixels. This factor has to be
taken into account when mapping from window coordinates to OpenGL, e.g.,
when calling glViewport.
How you can get this factor depends on the GUI library you are using. In
Qt, you can query it with QWindow::devicePixelRatio():
http://doc.qt.io/qt-5/qwindow.html#devicePixelRatio
So, there should be something like
glViewport(0, 0, window->width() * window->devicePixelRatio(),
window->height() * window->devicePixelRatio()).
Also keep in mind that you have to do the same e.g. for mouse coordinates.
I think osgQt already handles this correctly, so you shouldn't have to
worry about this if you use the classes provided by osgQt ...
Regards,
Stefan
On 10.03.2016 17:25, Ale Maro wrote:
Hi,
I recently compiled my application on OS X (it is a Qt based application).
Everything is working fine on Mac Mini (with Intel Iris graphics card).... and
the same code on Windows also works fine.
When I tried on an iMac 5K (ATI Radeon R9 M290) I had a visualization problem.
The view is shown in the bottom left quadrant of the windows (instead of
covering the entire window) and the other quadrants are not refreshed.
I tried with any resolution and the problem remains the same.
Any ideas?
Thank you for any help.
Best regards,
Ale
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=66512#66512
_______________________________________________
osg-users mailing list
osg-users@lists.openscenegraph.org
http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
_______________________________________________
osg-users mailing list
osg-users@lists.openscenegraph.org
http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
