1 files changed, 89 insertions, 0 deletions
diff --git a/vcl/unx/generic/gdi/salgdi2.cxx b/vcl/unx/generic/gdi/salgdi2.cxx
new file mode 100644
index 000000000..f26048ae1
--- /dev/null
+++ b/vcl/unx/generic/gdi/salgdi2.cxx
@@ -0,0 +1,89 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <salgdiimpl.hxx>
+
+#include <vcl/sysdata.hxx>
+
+#include <unx/saldisp.hxx>
+#include <unx/salgdi.h>
+#include <unx/x11/xrender_peer.hxx>
+#include <salframe.hxx>
+
+extern "C"
+{
+    static Bool GraphicsExposePredicate( Display*, XEvent* pEvent, const XPointer pFrameWindow )
+    {
+        Bool bRet = False;
+        if( (pEvent->type == GraphicsExpose || pEvent->type == NoExpose) &&
+            pEvent->xnoexpose.drawable == reinterpret_cast<Drawable>(pFrameWindow) )
+        {
+            bRet = True;
+        }
+        return bRet;
+    }
+}
+
+void X11SalGraphics::YieldGraphicsExpose()
+{
+    // get frame if necessary
+    SalFrame* pFrame    = m_pFrame;
+    Display* pDisplay   = GetXDisplay();
+    ::Window aWindow = GetDrawable();
+    if( ! pFrame )
+    {
+        for (auto pSalFrame : vcl_sal::getSalDisplay(GetGenericUnixSalData())->getFrames() )
+        {
+            const SystemEnvData* pEnvData = pSalFrame->GetSystemData();
+            if( Drawable(pEnvData->GetWindowHandle(pSalFrame)) == aWindow )
+            {
+                pFrame = pSalFrame;
+                break;
+            }
+        }
+        if( ! pFrame )
+            return;
+    }
+
+    XEvent aEvent;
+    while( XCheckTypedWindowEvent( pDisplay, aWindow, Expose, &aEvent ) )
+    {
+        SalPaintEvent aPEvt( aEvent.xexpose.x, aEvent.xexpose.y, aEvent.xexpose.width+1, aEvent.xexpose.height+1 );
+        pFrame->CallCallback( SalEvent::Paint, &aPEvt );
+    }
+
+    do
+    {
+        if( ! GetDisplay()->XIfEventWithTimeout( &aEvent, reinterpret_cast<XPointer>(aWindow), GraphicsExposePredicate ) )
+            // this should not happen at all; still sometimes it happens
+            break;
+
+        if( aEvent.type == NoExpose )
+            break;
+
+        if( pFrame )
+        {
+            SalPaintEvent aPEvt( aEvent.xgraphicsexpose.x, aEvent.xgraphicsexpose.y, aEvent.xgraphicsexpose.width+1, aEvent.xgraphicsexpose.height+1 );
+            pFrame->CallCallback( SalEvent::Paint, &aPEvt );
+        }
+    } while( aEvent.xgraphicsexpose.count != 0 );
+}
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */