[PyOpenGL-Devel] [ pyopengl-Bugs-2895081 ] Unknown specifier GL_MAX_TEXTURE_IMAGE_UNITS

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Bugs item #2895081, was opened at 2009-11-10 04:04
Message generated for change (Comment added) made by mcfletch
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Category: GL
Group: v3.0.0
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: https://www.google.com/accounts ()
Assigned to: Mike C. Fletcher (mcfletch)
Summary: Unknown specifier GL_MAX_TEXTURE_IMAGE_UNITS

Initial Comment:
Running:

print 'Max texture image units ', glGetInteger(GL_MAX_TEXTURE_IMAGE_UNITS)

Produces the following error:

  File "/usr/lib/python2.6/site-packages/OpenGL/wrapper.py", line 1282, in __call__
    return self._finalCall( *args, **named )
  File "/usr/lib/python2.6/site-packages/OpenGL/wrapper.py", line 552, in wrapperCall
    cArgs = tuple(calculate_cArgs( pyArgs ))
  File "/usr/lib/python2.6/site-packages/OpenGL/wrapper.py", line 355, in calculate_cArgs
    yield converter( pyArgs, index, self )
  File "/usr/lib/python2.6/site-packages/OpenGL/converters.py", line 195, in __call__
    return self.arrayType.zeros( self.getSize(pyArgs) )
  File "/usr/lib/python2.6/site-packages/OpenGL/converters.py", line 234, in getSize
    raise KeyError( """Unknown specifier %s"""%( specifier ))
KeyError: ('Unknown specifier GL_MAX_TEXTURE_IMAGE_UNITS (34930)', 'Failure in cConverter <OpenGL.converters.SizedOutput object at 0x187a140>', (GL_MAX_TEXTURE_IMAGE_UNITS,), 1, <OpenGL.wrapper.glGetIntegerv object at 0x1872f38>)


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>Comment By: Mike C. Fletcher (mcfletch)
Date: 2009-11-13 11:16

Message:
Just implemented the first suite of truly automated tests, but they
wouldn't have caught this, as I don't have any code exercising the missing
features.

As for an ugly workaround, you can call OpenGL.GL.glget.addGLGetConstant(
constant, (1,) )

where (1,) is the dimension of the array to be created for the constant,
so e.g. (4,4) for most matrices.

I've also added a script that goes ahead and attempts to use glGet on
*every* constant in the core, but that's limited by the hardware/drivers I
have available.

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Comment By: https://www.google.com/accounts ()
Date: 2009-11-10 23:12

Message:
Some automated tests might be helpful too =)

Is there some ugly workaround for this? I am not sure that people running
my software will have the desire/ability to upgrade to 3.0.1?

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Comment By: Mike C. Fletcher (mcfletch)
Date: 2009-11-10 11:48

Message:
Wow, there were a *lot* of bugs hiding behind that one.  Any non-extension
glGet constant over about GL 1.1 was going to raise an error.  I've updated
the code to have all GL 2.1 constants, but there's going to be 3.0, 3.1 and
3.2 constants missing.  Need to get a better mechanism for determining what
can be used with glGet to make this automatic.

3.0.1 should have the fix for the particular bug here.

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