[PyOpenGL-Users] glGet issues

[Tomasz W. <ko...@gm...>]

Hello,

I've noticed that this call:

	out = GL.glGetTexParameteriv(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_SWIZZLE_B)

raises:

	KeyError: ('Unknown specifier GL_TEXTURE_SWIZZLE_B (0x8E44)',
'Failure in cConverter <OpenGL.converters.SizedOutput object at
0x02F8A300>', (GL_TEXTURE_2D, GL_TEXTURE_SWIZZLE_B), 2,
<ctypes.glGetTexParameteriv object at 0x02F9D238>)

This is probably because the list of parameter sizes hardcoded in
glget.h is a bit out-of-date:

	TEX_PARAMETER_SIZES = {
	    simple.GL_TEXTURE_MAG_FILTER: (1,),
	    simple.GL_TEXTURE_MIN_FILTER: (1,),
	    simple.GL_TEXTURE_WRAP_S: (1,),
	    simple.GL_TEXTURE_WRAP_T: (1,),
	    simple.GL_TEXTURE_BORDER_COLOR: (4,),
	    simple.GL_TEXTURE_PRIORITY: (1,),
	    simple.GL_TEXTURE_RESIDENT: (1,)
	}

Sadly, I aparrently can't call this function "normally", without the
ctypes enhancement:

	out = ctypes.c_int()
	GL.glGetTexParameteriv(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_SWIZZLE_B,
ctypes.byref(out))

because of:

	ValueError: glGetTexParameteriv requires 2 arguments (target, pname),
received 3: (GL_TEXTURE_2D, GL_TEXTURE_SWIZZLE_B, <cparam 'P'
(03513AA8)>)

Is that a bug?

BTW I've also noticed that GL.glGetTexParameteriv(GL.GL_TEXTURE_2D,
GL.GL_TEXTURE_WRAP_S) returns a numpy.int32, not
opengl.constant.IntConstant - is it intended?

Regards,
-- Kos