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diff --git a/vcl/inc/quartz/salgdicommon.hxx b/vcl/inc/quartz/salgdicommon.hxx
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+++ b/vcl/inc/quartz/salgdicommon.hxx
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+/* -*- 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 .
+ */
+
+#ifndef INCLUDED_VCL_INC_QUARTZ_SALGDICOMMON_HXX
+#define INCLUDED_VCL_INC_QUARTZ_SALGDICOMMON_HXX
+
+#include <iostream>
+
+#include <premac.h>
+#ifdef IOS
+#include <CoreGraphics/CoreGraphics.h>
+#else
+#include <ApplicationServices/ApplicationServices.h>
+#endif
+#include <postmac.h>
+
+#include <tools/color.hxx>
+#include <vcl/salgtype.hxx>
+
+// abstracting quartz color instead of having to use a CGFloat[] array
+class RGBAColor
+{
+public:
+    RGBAColor( ::Color );
+    RGBAColor( float fRed, float fGreen, float fBlue, float fAlpha ); //NOTUSEDYET
+    const CGFloat* AsArray() const { return m_fRGBA; }
+    bool IsVisible() const { return m_fRGBA[3] > 0; }
+    void SetAlpha( float fAlpha ) { m_fRGBA[3] = fAlpha; }
+
+    CGFloat GetRed() const   { return m_fRGBA[0]; }
+    CGFloat GetGreen() const { return m_fRGBA[1]; }
+    CGFloat GetBlue() const  { return m_fRGBA[2]; }
+    CGFloat GetAlpha() const { return m_fRGBA[3]; }
+private:
+    CGFloat m_fRGBA[4]; // red, green, blue, alpha
+};
+
+inline RGBAColor::RGBAColor( ::Color nColor )
+{
+    m_fRGBA[0] = nColor.GetRed() * (1.0/255);
+    m_fRGBA[1] = nColor.GetGreen() * (1.0/255);
+    m_fRGBA[2] = nColor.GetBlue() * (1.0/255);
+    m_fRGBA[3] = 1.0; // opaque
+}
+
+inline RGBAColor::RGBAColor( float fRed, float fGreen, float fBlue, float fAlpha )
+{
+    m_fRGBA[0] = fRed;
+    m_fRGBA[1] = fGreen;
+    m_fRGBA[2] = fBlue;
+    m_fRGBA[3] = fAlpha;
+}
+
+inline std::ostream &operator <<(std::ostream& s, const RGBAColor &aColor)
+{
+#ifndef SAL_LOG_INFO
+    (void) aColor;
+#else
+    s << "{" << aColor.GetRed() << "," << aColor.GetGreen() << "," << aColor.GetBlue() << "," << aColor.GetAlpha() << "}";
+#endif
+    return s;
+}
+
+// XOR emulation suckage.
+// See http://www.openoffice.org/marketing/ooocon2008/programme/wednesday_1401.pdf
+// and https://bugs.freedesktop.org/show_bug.cgi?id=38844 .
+
+class XorEmulation
+{
+public:
+    XorEmulation();
+    ~XorEmulation();
+
+    void SetTarget( int nWidth, int nHeight, int nBitmapDepth, CGContextRef, CGLayerRef );
+    bool UpdateTarget();
+    void Enable() { m_bIsEnabled = true; }
+    void Disable() { m_bIsEnabled = false; }
+    bool IsEnabled() const { return m_bIsEnabled; }
+    CGContextRef GetTargetContext() const { return m_xTargetContext; }
+    CGContextRef GetMaskContext() const { return (m_bIsEnabled ? m_xMaskContext : nullptr); }
+
+private:
+    CGLayerRef m_xTargetLayer;
+    CGContextRef m_xTargetContext;
+    CGContextRef m_xMaskContext;
+    CGContextRef m_xTempContext;
+    sal_uLong* m_pMaskBuffer;
+    sal_uLong* m_pTempBuffer;
+    int m_nBufferLongs;
+    bool m_bIsEnabled;
+};
+
+#endif // INCLUDED_VCL_INC_QUARTZ_SALGDICOMMON_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */