commit 5c5244b1622561809173cbfc41fa9c1290d55fe2
Author:     Albrecht Schlosser <albrechts.fltk@online.de>
AuthorDate: Tue Nov 9 19:36:26 2021 +0100
Commit:     Albrecht Schlosser <albrechts.fltk@online.de>
CommitDate: Tue Nov 9 19:36:26 2021 +0100

    Fix a fluid crash when writing a template screenshot
    
    We need to show() the window before we call fl_read_image() if it
    is not shown yet, otherwise fluid would crash.

 fluid/Fl_Window_Type.cxx | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git fluid/Fl_Window_Type.cxx fluid/Fl_Window_Type.cxx
index 8f0f39d..62ed479 100644
--- fluid/Fl_Window_Type.cxx
+++ fluid/Fl_Window_Type.cxx
@@ -425,8 +425,14 @@ void Fl_Window_Type::open() {
 uchar *Fl_Window_Type::read_image(int &ww, int &hh) {
   Overlay_Window *w = (Overlay_Window *)o;
 
+  int hidden = !w->shown();
+  w->show(); // make it the front window
+
   // Read the screen image...
-  return (w->read_image(ww, hh));
+  uchar *idata = w->read_image(ww, hh);
+  if (hidden)
+    w->hide();
+  return idata;
 }