Function gl::CompressedTexSubImage2D

pub unsafe fn CompressedTexSubImage2D(target: GLenum, level: GLint, xoffset: GLint, yoffset: GLint, width: GLsizei, height: GLsizei, format: GLenum, imageSize: GLsizei, data: *const c_void)

Fallbacks: CompressedTexSubImage2DARB