[ pyopengl-Bugs-3534110 ] hasGLExtension fail wrt circular import

Bugs item #3534110, was opened at 2012-06-10 03:02
Message generated for change (Tracker Item Submitted) made by lxnt
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Category: GL
Group: v3.0.0
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Alexander Sabourenkov (lxnt)
Assigned to: Mike C. Fletcher (mcfletch)
Summary: hasGLExtension fail wrt circular import

Initial Comment:
Given a 3.0+ forward-compatible context, that is, with glGetString barking at GL_EXTENSIONS, "from OpenGL.GL import *" may fail if one of OpenGL.GL.VERSION.GL_* submodules with version below 3.0  calls hasGLExtension() due to the fact that until "from OpenGL.GL.VERSION.GL_3_0 import *" line is executed in OpenGL/GL/__init__.py, the line "from OpenGL.GL import GL_NUM_EXTENSIONS, glGetStringi, glGetIntegerv" is guaranteed to throw an ImportError.

Suggested solution:

replace the aforementioned import statement in the hasExtension() function with the following two lines:

                from OpenGL.GL.VERSION.GL_3_0 import GL_NUM_EXTENSIONS, glGetStringi
                from OpenGL.GL import glGetIntegerv

Works for me.

Attached patch: the above fix plus a couple of nits to make it all work under Python 3.2



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