From 81615bbe0b96dc8640cee453b86bf8b4363b175a Mon Sep 17 00:00:00 2001
From: ManoloFLTK <41016272+ManoloFLTK@users.noreply.github.com>
Date: Mon, 26 Jun 2023 15:00:52 +0200
Subject: Fix Fl_Cocoa_Gl_Window_Driver::resize()

The additional [NSOpenGLContext flushBuffer] messages appear necessary when an Fl_Tile contains
2 or more GL subwindows.
---
 src/drivers/Cocoa/Fl_Cocoa_Gl_Window_Driver.mm | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'src/drivers')

diff --git a/src/drivers/Cocoa/Fl_Cocoa_Gl_Window_Driver.mm b/src/drivers/Cocoa/Fl_Cocoa_Gl_Window_Driver.mm
index 74468ae96..dd69ad344 100644
--- a/src/drivers/Cocoa/Fl_Cocoa_Gl_Window_Driver.mm
+++ b/src/drivers/Cocoa/Fl_Cocoa_Gl_Window_Driver.mm
@@ -358,8 +358,10 @@ char Fl_Cocoa_Gl_Window_Driver::swap_type() {return copy;}
 void Fl_Cocoa_Gl_Window_Driver::resize(int is_a_resize, int w, int h) {
   if (pWindow->shown()) apply_scissor();
   [(NSOpenGLContext*)pWindow->context() update];
+  [(NSOpenGLContext*)pWindow->context() flushBuffer];
   if (gl1ctxt) {
     [gl1ctxt update];
+    [gl1ctxt flushBuffer];
   }
 }
 
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