OpenGL.GL.NV.texture_compression_vtc
OpenGL extension NV.texture_compression_vtc
This module customises the behaviour of the
OpenGL.raw.GL.NV.texture_compression_vtc to provide a more
Python-friendly API
Overview (from the spec)
This extension adds support for the VTC 3D texture compression
formats, which are analogous to the S3TC texture compression formats,
with the addition of some retiling in the Z direction. VTC has the
same compression ratio as S3TC and uses 4x4x1, 4x4x2, (4x4x3 when
non-power-of-two textures are supported), or 4x4x4 blocks.
The official definition of this extension is available here:
http://www.opengl.org/registry/specs/NV/texture_compression_vtc.txt