Created attachment 381 [details]
Patch for WindowsWGLGraphicsConfigurationFactory.java

I'm creating a GLCanvas with a GLCapabilities object that requests non-hardware-accelerated capabilities and a custom chooser like in this code snippet:

GLCapabilities caps = new GLCapabilities(null);
caps.setHardwareAccelerated(false);
GLCanvas canvas = new GLCanvas(caps, new CustomCapabilitiesChooser(), null, null);

The problem is that the provided chooser's chooseCapabilities method is only supplied GLCapabilities that are hardware accelerated.

After further investigation I could find the reason for this in the class WindowsWGLGraphicsConfigurationFactory. The method updateGraphicsConfiguration tries to use updateGraphicsConfigurationARB (which only provides hardware-accelerated capabilities) and only if that method fails, it uses updateGraphicsConfigurationGDI (which also provides non-hardware-accelerated capabilities):

if( !updateGraphicsConfigurationARB((WindowsWGLDrawableFactory)factory, config, chooser, hdc, extHDC, pfdIDs) ) {
	updateGraphicsConfigurationGDI(config, chooser, hdc, extHDC, pfdIDs);
}

I have implemented a simple solution by checking if non-hardware-accelerated capabilities are requested and skipping the ...ARB method in that case, which is attached as a patch. A better solution might be to supply both the capabilities from ARB and GDI to the chooser.