69 lines
2.6 KiB
C++
69 lines
2.6 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#ifndef INCLUDED_VCL_INC_IMPFONTCACHE_HXX
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#define INCLUDED_VCL_INC_IMPFONTCACHE_HXX
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#include <unordered_map>
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#include "fontselect.hxx"
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class Size;
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namespace vcl { class Font; }
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class PhysicalFontCollection;
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// TODO: closely couple with PhysicalFontCollection
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class ImplFontCache
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{
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private:
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LogicalFontInstance* mpFirstEntry;
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int mnRef0Count; // number of unreferenced LogicalFontInstances
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// cache of recently used font instances
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struct IFSD_Equal { bool operator()( const FontSelectPattern&, const FontSelectPattern& ) const; };
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struct IFSD_Hash { size_t operator()( const FontSelectPattern& ) const; };
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typedef std::unordered_map<FontSelectPattern,LogicalFontInstance*,IFSD_Hash,IFSD_Equal > FontInstanceList;
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FontInstanceList maFontInstanceList;
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int CountUnreferencedEntries() const;
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public:
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ImplFontCache();
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~ImplFontCache();
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LogicalFontInstance* GetFontInstance( PhysicalFontCollection*,
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const vcl::Font&, const Size& rPixelSize, float fExactHeight);
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LogicalFontInstance* GetFontInstance( PhysicalFontCollection*, FontSelectPattern& );
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LogicalFontInstance* GetGlyphFallbackFont( PhysicalFontCollection*, FontSelectPattern&,
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int nFallbackLevel, OUString& rMissingCodes );
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/// Increase the refcount of the given LogicalFontInstance.
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void Acquire(LogicalFontInstance*);
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/// Decrease the refcount and potentially cleanup the entries with zero refcount from the cache.
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void Release(LogicalFontInstance*);
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void Invalidate();
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};
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#endif // INCLUDED_VCL_INC_IMPFONTCACHE_HXX
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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