From 2a75e82e3df5ac792a8d2e780e4374463bcf654c Mon Sep 17 00:00:00 2001
From: Manolo Gouy <Manolo>
Date: Sun, 28 Mar 2010 06:58:39 +0000
Subject: [PATCH] Fl_Gl_Device_Plugin: better code for GL window capture after
 coverage by print dialog windows

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@7348 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
---
 src/Fl_Gl_Device_Plugin.cxx | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/src/Fl_Gl_Device_Plugin.cxx b/src/Fl_Gl_Device_Plugin.cxx
index 53fc5afad..f8e1e1021 100644
--- a/src/Fl_Gl_Device_Plugin.cxx
+++ b/src/Fl_Gl_Device_Plugin.cxx
@@ -58,13 +58,15 @@ static void print_gl_window(Fl_Abstract_Printer *printer, Fl_Gl_Window *glw, int
   Fl_Window *win = (Fl_Window*)glw;
   while( win->window() ) win = win->window();
   win->redraw();
-#else
-  glw->redraw();
-#endif
   Fl::check();
   glw->make_current();
-  // select front buffer as our source for pixel data
-  glReadBuffer(GL_FRONT);
+#else
+  glw->make_current();
+  glw->redraw();
+  glFlush();
+  Fl::check();
+  glFinish();
+#endif
   // Read OpenGL context pixels directly.
   // For extra safety, save & restore OpenGL states that are changed
   glPushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);