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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 .
*/
#pragma once
#include <sal/config.h>
#include <rtl/ref.hxx>
#include <o3tl/lru_map.hxx>
#include <o3tl/hash_combine.hxx>
#include <tools/gen.hxx>
#include "font/FontSelectPattern.hxx"
#include "glyphid.hxx"
class Size;
namespace vcl { class Font; }
namespace vcl::font { class PhysicalFontCollection; }
// TODO: closely couple with PhysicalFontCollection
struct GlyphBoundRectCacheKey
{
const LogicalFontInstance* m_pFont;
const sal_GlyphId m_nId;
GlyphBoundRectCacheKey(const LogicalFontInstance* pFont, sal_GlyphId nID)
: m_pFont(pFont), m_nId(nID)
{}
bool operator==(GlyphBoundRectCacheKey const& aOther) const
{ return m_pFont == aOther.m_pFont && m_nId == aOther.m_nId; }
};
struct GlyphBoundRectCacheHash
{
std::size_t operator()(GlyphBoundRectCacheKey const& aCache) const
{
std::size_t seed = 0;
o3tl::hash_combine(seed, aCache.m_pFont);
o3tl::hash_combine(seed, aCache.m_nId);
return seed;
}
};
typedef o3tl::lru_map<GlyphBoundRectCacheKey, tools::Rectangle,
GlyphBoundRectCacheHash> GlyphBoundRectCache;
class ImplFontCache
{
private:
// cache of recently used font instances
struct IFSD_Equal { bool operator()( const vcl::font::FontSelectPattern&, const vcl::font::FontSelectPattern& ) const; };
struct IFSD_Hash { size_t operator()( const vcl::font::FontSelectPattern& ) const; };
typedef o3tl::lru_map<vcl::font::FontSelectPattern, rtl::Reference<LogicalFontInstance>, IFSD_Hash, IFSD_Equal> FontInstanceList;
LogicalFontInstance* mpLastHitCacheEntry; ///< keeps the last hit cache entry
FontInstanceList maFontInstanceList;
GlyphBoundRectCache m_aBoundRectCache;
rtl::Reference<LogicalFontInstance> GetFontInstance(vcl::font::PhysicalFontCollection const*, vcl::font::FontSelectPattern&);
public:
ImplFontCache();
~ImplFontCache();
rtl::Reference<LogicalFontInstance> GetFontInstance(vcl::font::PhysicalFontCollection const *,
const vcl::Font&, const Size& rPixelSize, float fExactHeight, bool bNonAntialias = false);
rtl::Reference<LogicalFontInstance> GetGlyphFallbackFont( vcl::font::PhysicalFontCollection const *, vcl::font::FontSelectPattern&,
LogicalFontInstance* pLogicalFont,
int nFallbackLevel, OUString& rMissingCodes );
bool GetCachedGlyphBoundRect(const LogicalFontInstance *, sal_GlyphId, tools::Rectangle &);
void CacheGlyphBoundRect(const LogicalFontInstance *, sal_GlyphId, tools::Rectangle &);
void Invalidate();
};
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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