Detecting max multisamples

Is there a preferred method of detecting the max number of samples a machine can use? This seems to be something OpenGL cannot do (at least not in GL2), but perhaps the JOGL code has it buried somewhere?

Thanks

Hi

You can use the constant MAX_SAMPLES with glGetInt to get this value with any version of OpenGL supporting GL_ARB_texture_multisample. I disagree with your remark about GL2.

On Monday, September 26, 2011 09:33:43 AM gouessej [via jogamp] wrote:
>
> Hi
>
> You can use the constant MAX_SAMPLES with glGetInt to get this value with
> any version of OpenGL supporting GL_ARB_texture_multisample. I disagree with
> your remark about GL2.
>

For the GL query, use Julien's above.

Here you can see how you gather all available GLCapabilities:
  http://jogamp.org/git/?p=jogl.git;a=blob;f=src/test/com/jogamp/opengl/test/junit/jogl/acore/TestGLProfile01NEWT.java;hb=HEAD#l58

Here is a test whether a list of such caps has any multisample support in it:
  http://jogamp.org/git/?p=jogl.git;a=blob;f=src/test/com/jogamp/opengl/test/junit/jogl/caps/MultisampleChooser01.java;hb=HEAD

Applied here for one NEWT window's GLDrawable
  http://jogamp.org/git/?p=jogl.git;a=blob;f=src/test/com/jogamp/opengl/test/junit/jogl/caps/TestMultisampleNEWT.java;hb=HEAD

.. but you can check on all available caps (see above) as well.

~Sven

Thanks, both answers were helpful. I think my mistake was in using a system with a driver that did not properly detect GL_MAX_SAMPLES, and it reported a value that was too high to be correct. This is quite useful though.

I assume it returned something close to the biggest integer.