Documentation: homogenize to 'scale factor' and 'drawing unit'

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.4@12737 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

1 files changed, 4 insertions, 1 deletions

diff --git a/src/Fl_Image_Surface.cxx b/src/Fl_Image_Surface.cxx
index bf115dcfa..9333d858a 100644
--- a/src/Fl_Image_Surface.cxx
+++ b/src/Fl_Image_Surface.cxx
@@ -186,9 +186,12 @@ void fl_end_offscreen() {
   Fl_Surface_Device::pop_current();
 }
 
-/** Adapts an offscreen buffer to a changed value of the graphical scaling factor.
+/** Adapts an offscreen buffer to a changed value of the scale factor.
  The \p ctx argument must have been created by fl_create_offscreen()
  and the calling context must not be between fl_begin_offscreen() and fl_end_offscreen().
+ The graphical content of the offscreen is preserved. The current scale factor
+ value is given by <tt>Fl_Graphics_Driver::default_driver().scale()</tt>.
+ \version 1.4
  */
 void fl_scale_offscreen(Fl_Offscreen &ctx) {
   int i, w, h;