code: func CopyTexSubImage1D(target uint32, level int32, xoffset int32, x int32, y int32, width int32) {
  	C.glowCopyTexSubImage1D(gpCopyTexSubImage1D, (C.GLenum)(target), (C.GLint)(level), (C.GLint)(xoffset), (C.GLint)(x), (C.GLint)(y), (C.GLsizei)(width))
  }
docs: // copy a one-dimensional texture subimage