[PyOpenGL-Devel] [ pyopengl-Bugs-3441875 ] Unable to send null pointer (or zero) to glTexSubImage()

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Bugs item #3441875, was opened at 2011-11-24 12:27
Message generated for change (Tracker Item Submitted) made by fizzgig
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Category: GL
Group: v3.0.0
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Marcus Lindblom (fizzgig)
Assigned to: Mike C. Fletcher (mcfletch)
Summary: Unable to send null pointer (or zero) to glTexSubImage()

Initial Comment:
When updating a texture from a PBO, the value for pixels is an offset into the PBO.

This cannot be done using the pythonic API in PyOpenGL. (it fails to convert None to an array, and a zero-int is treated as a small array, yielding an gl error)

The workaround is to use the raw api thusly:

 raw.GL.glTexSubImage2D(GL.GL_TEXTURE_2D, 0, 0, 0, width, height, GL.GL_BGR, GL.GL_UNSIGNED_BYTE, POINTER(ctypes.c_ubyte)())



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You can respond by visiting: 
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