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[STR Pending]

Link: https://www.fltk.org/str.php?L3534
Version: 1.4-current
Fix Version: 1.4-current
Git Commit: 8f142b938ae5bbbb5a7677f1a7e71ee6308a7589


The doc says
  If both \p W and \p H are 0 the image is repeated as often as necessary
  to fill the entire window, unless there is a valid clip region. If you
  want to fill only one particular widget's background, then you should
  either set a clip region in your draw() method or use the label alignment
  flags \p FL_ALIGN_INSIDE|FL_ALIGN_CLIP to make sure the image is clipped.

From this, my understanding is that, when W and H are initially 0,
it's correct to set:
    W = Fl_Window::current()->w();
    H = Fl_Window::current()->h();
    X = Y = 0;
also if only a widget is to be painted because the limitation 
to the widget's area is done by the clip mechanism, not by setting
X, Y, W and H adequately for the widget.


Link: https://www.fltk.org/str.php?L3534
Version: 1.4-current
Fix Version: 1.4-current
Git Commit: 8f142b938ae5bbbb5a7677f1a7e71ee6308a7589