Why is GL_DEPTH_BITS deprecated in GL 3.3?

[V-man]

glGetIntegerv(GL_DEPTH_BITS, &DepthBits);

[alder]

I think you are supposed to use glGetFramebufferAttachmentParameteriv with FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE as param (although I haven't yet figured out how to get it to work with the default framebuffer on AMD 11.2).

[tksuoran]

I also have failed to query the default framebuffer and I wonder if this a bug or intentional.

Meanwhile you can use WGL, XGL, EGL or whatever you used to create the default framebuffer, to check what depth etc. you got.