code: func TexSubImage1D(target uint32, level int32, xoffset int32, width int32, format uint32, xtype uint32, pixels unsafe.Pointer) {
  	C.glowTexSubImage1D(gpTexSubImage1D, (C.GLenum)(target), (C.GLint)(level), (C.GLint)(xoffset), (C.GLsizei)(width), (C.GLenum)(format), (C.GLenum)(xtype), pixels)
  }
docs: // specify a one-dimensional texture subimage