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diff --git a/vcl/inc/win/winlayout.hxx b/vcl/inc/win/winlayout.hxx
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+++ b/vcl/inc/win/winlayout.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_WIN_WINLAYOUT_HXX
+#define INCLUDED_VCL_INC_WIN_WINLAYOUT_HXX
+
+#include <rtl/ustring.hxx>
+
+#include <sallayout.hxx>
+#include <svsys.h>
+#include <win/salgdi.h>
+#include <o3tl/sorted_vector.hxx>
+
+class WinFontInstance;
+
+namespace
+{
+// Extra space at the top and bottom of the glyph in total = tmHeight / GLYPH_SPACE_RATIO;
+const int GLYPH_SPACE_RATIO = 8;
+// Border size at the top of the glyph = tmHeight / GLYPH_OFFSET_RATIO;
+const int GLYPH_OFFSET_RATIO = GLYPH_SPACE_RATIO * 2;
+}
+
+struct WinGlyphDrawElement
+{
+    tools::Rectangle maLocation;
+    int maLeftOverhangs;
+    std::unique_ptr<CompatibleDC::Texture> maTexture;
+    int mnBaselineOffset;
+    int mnHeight;
+    bool mbVertical;
+
+    int getExtraSpace() const
+    {
+        return std::max(mnHeight / GLYPH_SPACE_RATIO, 4);
+    }
+
+    int getExtraOffset() const
+    {
+        return std::max(mnHeight / GLYPH_OFFSET_RATIO, 2);
+    }
+};
+
+class WinGlyphCache;
+
+struct GlobalWinGlyphCache
+{
+    o3tl::sorted_vector<WinGlyphCache*> maWinGlyphCaches;
+
+    static GlobalWinGlyphCache * get();
+
+    virtual ~GlobalWinGlyphCache() {}
+    virtual bool AllocateTexture(WinGlyphDrawElement& rElement, CompatibleDC* dc) = 0;
+    virtual void NotifyElementUsed(WinGlyphDrawElement& /*rElement*/) {}
+    virtual void Prune() {}
+};
+
+class WinGlyphCache
+{
+protected:
+    std::unordered_map<int, WinGlyphDrawElement> maWinTextureCache;
+
+public:
+    WinGlyphCache()
+    {
+        if(GlobalWinGlyphCache* c = GlobalWinGlyphCache::get())
+            c->maWinGlyphCaches.insert(this);
+    }
+
+    virtual ~WinGlyphCache()
+    {
+        if(GlobalWinGlyphCache* c = GlobalWinGlyphCache::get())
+            c->maWinGlyphCaches.erase(this);
+    }
+
+    void PutDrawElementInCache(WinGlyphDrawElement&& rElement, int nGlyphIndex)
+    {
+        assert(GlobalWinGlyphCache::get());
+        assert(!IsGlyphCached(nGlyphIndex));
+        maWinTextureCache[nGlyphIndex] = std::move( rElement );
+    }
+
+    WinGlyphDrawElement& GetDrawElement(int nGlyphIndex)
+    {
+        assert(GlobalWinGlyphCache::get());
+        assert(IsGlyphCached(nGlyphIndex));
+        WinGlyphDrawElement& element = maWinTextureCache[nGlyphIndex];
+        GlobalWinGlyphCache::get()->NotifyElementUsed(element);
+        return element;
+    }
+
+    bool IsGlyphCached(int nGlyphIndex) const
+    {
+        return maWinTextureCache.find(nGlyphIndex) != maWinTextureCache.end();
+    }
+};
+
+// win32 specific logical font instance
+class WinFontInstance : public LogicalFontInstance
+{
+    friend rtl::Reference<LogicalFontInstance> WinFontFace::CreateFontInstance(const FontSelectPattern&) const;
+
+public:
+    ~WinFontInstance() override;
+
+    bool hasHScale() const;
+    float getHScale() const;
+
+    void SetGraphics(WinSalGraphics*);
+    WinSalGraphics* GetGraphics() const { return m_pGraphics; }
+
+    HFONT GetHFONT() const { return m_hFont; }
+    float GetScale() const { return m_fScale; }
+
+    // Prevent deletion of the HFONT in the WinFontInstance destructor
+    // Used for the ScopedFont handling
+    void SetHFONT(HFONT hFont) { m_hFont = hFont; }
+
+    const WinFontFace * GetFontFace() const { return static_cast<const WinFontFace *>(LogicalFontInstance::GetFontFace()); }
+    WinFontFace * GetFontFace() { return static_cast<WinFontFace *>(LogicalFontInstance::GetFontFace()); }
+
+    bool CacheGlyphToAtlas(HDC hDC, HFONT hFont, int nGlyphIndex, SalGraphics& rGraphics, const GenericSalLayout& rLayout);
+    WinGlyphCache& GetWinGlyphCache() { return maWinGlyphCache; }
+
+    bool GetGlyphOutline(sal_GlyphId, basegfx::B2DPolyPolygon&, bool) const override;
+
+private:
+    explicit WinFontInstance(const WinFontFace&, const FontSelectPattern&);
+
+    hb_font_t* ImplInitHbFont() override;
+    bool ImplGetGlyphBoundRect(sal_GlyphId, tools::Rectangle&, bool) const override;
+
+    WinSalGraphics *m_pGraphics;
+    HFONT m_hFont;
+    float m_fScale;
+    WinGlyphCache maWinGlyphCache;
+};
+
+class TextOutRenderer
+{
+protected:
+    explicit TextOutRenderer() = default;
+    TextOutRenderer(const TextOutRenderer &) = delete;
+    TextOutRenderer & operator = (const TextOutRenderer &) = delete;
+
+public:
+    static TextOutRenderer & get(bool bUseDWrite);
+
+    virtual ~TextOutRenderer() = default;
+
+    virtual bool operator ()(GenericSalLayout const &rLayout,
+        SalGraphics &rGraphics,
+        HDC hDC) = 0;
+};
+
+class ExTextOutRenderer : public TextOutRenderer
+{
+    ExTextOutRenderer(const ExTextOutRenderer &) = delete;
+    ExTextOutRenderer & operator = (const ExTextOutRenderer &) = delete;
+
+public:
+    explicit ExTextOutRenderer() = default;
+
+    bool operator ()(GenericSalLayout const &rLayout,
+        SalGraphics &rGraphics,
+        HDC hDC) override;
+};
+
+#endif // INCLUDED_VCL_INC_WIN_WINLAYOUT_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */