Checking if a certain version is available on the system

Hi,

I have an application that wants to query "is open gl 3.30 availble" and only then initialize a Window with an OpenGL render path. If it is not available it will create a java2d based fallback instead.

So I need a function with this interface:

public static boolean isGLSLSupported(com.jogamp.common.util.VersionNumber vn);

The only way I came up with however seems rather cluncky:

http://pastebin.com/mUSncfE0

I then call it like this:
System.out.println("#version 330 core is supported: " + isGLSLSupported(new VersionNumber(3, 30, 0)));

I am not quite sure if this is even a correct way to do this, can anybody verify if this at least works? As clunky as it is I feel uneasy doing this ;)

Hi

You can use this method on the available profiles:
http://jogamp.org/deployment/jogamp-next/javadoc/jogl/javadoc/com/jogamp/opengl/GLProfile.html#hasGLSL()

So I've tried this code now:

        private static boolean canRunOpenGL() {
                GLProfile prof = GLProfile.getDefault();
                return prof.isGL3() && prof.hasGLSL();
        }

That seems to do the trick on a netbook I have.
On a laptop of another person however this returns true and then proceeds to fail to actually compile the version 330 core shaders with these messages:

http://i.imgur.com/xVQLumk.png

Can I detect that as well with the GLProfile stuff? Or will I need to even extend my code from above to test if it can compile the shaders?

You can call glAvailabilityToString() but you'll have to look for information into the returned string by yourself.

I run a testprogram: http://pastebin.com/G8e6PqDn

The output on the problematic laptop is:

can run OpenGL 4: false
can run OpenGL 3: true
GL version is 3.2 (Core profile, arb, compat[], FBO, hardware) - 3.2.9262 Core Profile Context
GLSL version number is 1.50.0
GLSL version check for 3.30 returns: false

So it's exactly one minor version away from supporting OpenGL 3.3. I guess the test for GL3 returns true for any 3.x version, which is not enough to determine if 3.3 is available.

I think I will first check if OpenGL 4 is available and if it is not available create a fake window to create a GLContext that I can ask for the exact supported version.

Thanks for the help