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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_IMPFONTCACHE_HXX
#define INCLUDED_VCL_INC_IMPFONTCACHE_HXX
#include <unordered_map>
#include "fontselect.hxx"
class Size;
namespace vcl { class Font; }
class PhysicalFontCollection;
// TODO: closely couple with PhysicalFontCollection
class ImplFontCache
{
private:
LogicalFontInstance* mpFirstEntry;
int mnRef0Count; // number of unreferenced LogicalFontInstances
// cache of recently used font instances
struct IFSD_Equal { bool operator()( const FontSelectPattern&, const FontSelectPattern& ) const; };
struct IFSD_Hash { size_t operator()( const FontSelectPattern& ) const; };
typedef std::unordered_map<FontSelectPattern,LogicalFontInstance*,IFSD_Hash,IFSD_Equal > FontInstanceList;
FontInstanceList maFontInstanceList;
int CountUnreferencedEntries() const;
public:
ImplFontCache();
~ImplFontCache();
LogicalFontInstance* GetFontInstance( PhysicalFontCollection*,
const vcl::Font&, const Size& rPixelSize, float fExactHeight);
LogicalFontInstance* GetFontInstance( PhysicalFontCollection*, FontSelectPattern& );
LogicalFontInstance* GetGlyphFallbackFont( PhysicalFontCollection*, FontSelectPattern&,
int nFallbackLevel, OUString& rMissingCodes );
/// Increase the refcount of the given LogicalFontInstance.
void Acquire(LogicalFontInstance*);
/// Decrease the refcount and potentially cleanup the entries with zero refcount from the cache.
void Release(LogicalFontInstance*);
void Invalidate();
};
#endif // INCLUDED_VCL_INC_IMPFONTCACHE_HXX
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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