OpenGL extension EXT.subtexture
This module customises the behaviour of the OpenGL.raw.GL.EXT.subtexture to provide a more Python-friendly API
Overview (from the spec)
This extension allows a contiguous portion of an already-existing texture image to be redefined, without affecting the remaining portion of the image, or any of the other state that describe the texture. No provision is made to query a subregion of a texture.
Semantics for null image pointers are defined for TexImage1D, TexImage2D, and TexImage3DEXT. Null image pointers can be used by applications to effectively support texture arrays whose dimensions are not a power of 2.
The official definition of this extension is available here:
Return boolean indicating whether this extension is available