OpenGL extension IBM.rasterpos_clip
This module customises the behaviour of the OpenGL.raw.GL.IBM.rasterpos_clip to provide a more Python-friendly API
Overview (from the spec)
IBM_rasterpos_clip extends the semantics of the RasterPos functions. It provides an enable that allows a raster position that would normally be clipped to be treated as a valid (albeit out-of-viewport) position.
This extension allows applications to specify geometry-aligned pixel primitives that may be partially off-screen. These primitives are tested on a pixel-by-pixel basis without being rejected completely because of an invalid raster position.
The official definition of this extension is available here: