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-rw-r--r--FL/mac.H3
1 files changed, 2 insertions, 1 deletions
diff --git a/FL/mac.H b/FL/mac.H
index 2cc0d9687..a089a0dbb 100644
--- a/FL/mac.H
+++ b/FL/mac.H
@@ -212,7 +212,8 @@ public:
private:
#if FLTK_ABI_VERSION >= 10304
CGRect* subRect_; // makes sure subwindow remains inside its parent window
- // stores 2 binary flags: whether window is mapped to retina display; whether resolution just changed
+ // stores 3 binary flags: whether window is mapped to retina display; whether resolution just changed;
+ // whether window is OpenGL and is currently being resized.
unsigned mapped_to_retina_;
#else
bool subwindow; // for ABI compatibility, useless with true subwindows