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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_FONTINSTANCE_HXX
#define INCLUDED_VCL_INC_FONTINSTANCE_HXX
#include "fontselect.hxx"
#include "impfontmetricdata.hxx"
#include <unordered_map>
#include <memory>
#include <hb-ot.h>
class ConvertChar;
class ImplFontCache;
class PhysicalFontFace;
// TODO: allow sharing of metrics for related fonts
class VCL_PLUGIN_PUBLIC LogicalFontInstance
{
// just declaring the factory function doesn't work AKA
// friend LogicalFontInstance* PhysicalFontFace::CreateFontInstance(const FontSelectPattern&) const;
friend class PhysicalFontFace;
friend class ImplFontCache;
public: // TODO: make data members private
virtual ~LogicalFontInstance();
ImplFontMetricDataRef mxFontMetric; // Font attributes
const ConvertChar* mpConversion; // used e.g. for StarBats->StarSymbol
long mnLineHeight;
short mnOwnOrientation; // text angle if lower layers don't rotate text themselves
short mnOrientation; // text angle in 3600 system
bool mbInit; // true if maFontMetric member is valid
void AddFallbackForUnicode( sal_UCS4, FontWeight eWeight, const OUString& rFontName );
bool GetFallbackForUnicode( sal_UCS4, FontWeight eWeight, OUString* pFontName ) const;
void IgnoreFallbackForUnicode( sal_UCS4, FontWeight eWeight, const OUString& rFontName );
void Acquire();
void Release();
inline hb_font_t* GetHbFont();
void SetAverageWidthFactor(double nFactor) { m_nAveWidthFactor = nFactor; }
double GetAverageWidthFactor() const { return m_nAveWidthFactor; }
const FontSelectPattern& GetFontSelectPattern() const { return m_aFontSelData; }
const PhysicalFontFace* GetFontFace() const { return m_pFontFace; }
const ImplFontCache* GetFontCache() const { return mpFontCache; }
void GetScale(double* nXScale, double* nYScale);
static inline void DecodeOpenTypeTag(const uint32_t nTableTag, char* pTagName);
protected:
explicit LogicalFontInstance(const PhysicalFontFace&, const FontSelectPattern&);
// Takes ownership of pHbFace.
hb_font_t* InitHbFont(hb_face_t* pHbFace) const;
virtual hb_font_t* ImplInitHbFont() { assert(false); return nullptr; }
inline void ReleaseHbFont();
private:
// cache of Unicode characters and replacement font names
// TODO: a fallback map can be shared with many other ImplFontEntries
// TODO: at least the ones which just differ in orientation, stretching or height
typedef ::std::unordered_map< ::std::pair<sal_UCS4,FontWeight>, OUString > UnicodeFallbackList;
std::unique_ptr<UnicodeFallbackList> mpUnicodeFallbackList;
ImplFontCache * mpFontCache;
sal_uInt32 mnRefCount;
const FontSelectPattern m_aFontSelData;
hb_font_t* m_pHbFont;
double m_nAveWidthFactor;
const PhysicalFontFace* m_pFontFace;
};
inline hb_font_t* LogicalFontInstance::GetHbFont()
{
if (!m_pHbFont)
m_pHbFont = ImplInitHbFont();
return m_pHbFont;
}
inline void LogicalFontInstance::ReleaseHbFont()
{
if (!m_pHbFont)
return;
hb_font_destroy(m_pHbFont);
m_pHbFont = nullptr;
}
inline void LogicalFontInstance::DecodeOpenTypeTag(const uint32_t nTableTag, char* pTagName)
{
pTagName[0] = static_cast<char>(nTableTag >> 24);
pTagName[1] = static_cast<char>(nTableTag >> 16);
pTagName[2] = static_cast<char>(nTableTag >> 8);
pTagName[3] = static_cast<char>(nTableTag);
pTagName[4] = 0;
}
#endif // INCLUDED_VCL_INC_FONTINSTANCE_HXX
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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