From e66076c33b5875e68167b53fd9d663f4abd566c8 Mon Sep 17 00:00:00 2001
From: Michael Meeks <michael.meeks@collabora.com>
Date: Wed, 23 Dec 2015 13:37:33 +0000
Subject: tdf#96690 - don't copy tiny non-rendered-to virtual devices.

Change-Id: Ic9d90bb7f652599b5a6ce303aa026b7e4e255324
Reviewed-on: https://gerrit.libreoffice.org/21091
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Tor Lillqvist <tml@collabora.com>
Tested-by: Tor Lillqvist <tml@collabora.com>
---
 vcl/opengl/gdiimpl.cxx | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/vcl/opengl/gdiimpl.cxx b/vcl/opengl/gdiimpl.cxx
index 73a2c82913bb..c236125b482c 100644
--- a/vcl/opengl/gdiimpl.cxx
+++ b/vcl/opengl/gdiimpl.cxx
@@ -1649,6 +1649,13 @@ void OpenGLSalGraphicsImpl::DoCopyBits( const SalTwoRect& rPosAry, OpenGLSalGrap
 {
     VCL_GL_INFO( "::copyBits" );
 
+    if( !rImpl.maOffscreenTex )
+    {
+        VCL_GL_INFO( "::copyBits - skipping copy of un-initialized framebuffer contents of size "
+                     << rImpl.GetWidth() << "x" << rImpl.GetHeight() );
+        return;
+    }
+
     if( &rImpl == this &&
         (rPosAry.mnSrcWidth == rPosAry.mnDestWidth) &&
         (rPosAry.mnSrcHeight == rPosAry.mnDestHeight))
-- 
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