code: func CompressedTexSubImage2D(target uint32, level int32, xoffset int32, yoffset int32, width int32, height int32, format uint32, imageSize int32, data unsafe.Pointer) {
  	C.glowCompressedTexSubImage2D(gpCompressedTexSubImage2D, (C.GLenum)(target), (C.GLint)(level), (C.GLint)(xoffset), (C.GLint)(yoffset), (C.GLsizei)(width), (C.GLsizei)(height), (C.GLenum)(format), (C.GLsizei)(imageSize), data)
  }
docs: // specify a two-dimensional texture subimage in a compressed format