From 599909135bbae36f4fa1f294f7534826bac02eb7 Mon Sep 17 00:00:00 2001
From: Manolo Gouy <Manolo>
Date: Mon, 30 Apr 2018 09:25:52 +0000
Subject: Extend documentation of fl_begin_offscreen()

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.4@12885 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
---
 src/Fl_Image_Surface.cxx | 1 +
 1 file changed, 1 insertion(+)

(limited to 'src/Fl_Image_Surface.cxx')

diff --git a/src/Fl_Image_Surface.cxx b/src/Fl_Image_Surface.cxx
index 41c7c1eac..95cecf68a 100644
--- a/src/Fl_Image_Surface.cxx
+++ b/src/Fl_Image_Surface.cxx
@@ -173,6 +173,7 @@ void fl_delete_offscreen(Fl_Offscreen ctx) {
 
 /**  Send all subsequent drawing commands to this offscreen buffer.
    \param ctx     the offscreen buffer.
+   \note The \p ctx argument must have been created by fl_create_offscreen().
    */
 void fl_begin_offscreen(Fl_Offscreen ctx) {
   for (int i = 0; i < count_offscreens; i++) {
-- 
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