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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 <basegfx/polygon/b2dpolypolygon.hxx>
#include <o3tl/hash_combine.hxx>
#include <rtl/ref.hxx>
#include <salhelper/simplereferenceobject.hxx>
#include <tools/gen.hxx>
#include <tools/fontenum.hxx>
#include <tools/degree.hxx>
#include <font/FontSelectPattern.hxx>
#include <font/FontMetricData.hxx>
#include <glyphid.hxx>
#include <optional>
#include <unordered_map>
#include <hb.h>
class ConvertChar;
class ImplFontCache;
constexpr float ARTIFICIAL_ITALIC_MATRIX_XX = 1 << 16;
constexpr float ARTIFICIAL_ITALIC_MATRIX_XY = (1 << 16) / 3.f;
constexpr float ARTIFICIAL_ITALIC_SKEW = ARTIFICIAL_ITALIC_MATRIX_XY / ARTIFICIAL_ITALIC_MATRIX_XX;
// extend std namespace to add custom hash needed for LogicalFontInstance
namespace std
{
template <> struct hash<pair<sal_UCS4, FontWeight>>
{
size_t operator()(const pair<sal_UCS4, FontWeight>& rData) const
{
std::size_t seed = 0;
o3tl::hash_combine(seed, rData.first);
o3tl::hash_combine(seed, rData.second);
return seed;
}
};
}
// TODO: allow sharing of metrics for related fonts
class VCL_PLUGIN_PUBLIC LogicalFontInstance : public salhelper::SimpleReferenceObject
{
// just declaring the factory function doesn't work AKA
// friend LogicalFontInstance* PhysicalFontFace::CreateFontInstance(const FontSelectPattern&) const;
friend class vcl::font::PhysicalFontFace;
friend class ImplFontCache;
public: // TODO: make data members private
virtual ~LogicalFontInstance() override;
FontMetricDataRef mxFontMetric; // Font attributes
const ConvertChar* mpConversion; // used e.g. for StarBats->StarSymbol
tools::Long mnLineHeight;
Degree10 mnOwnOrientation; // text angle if lower layers don't rotate text themselves
Degree10 mnOrientation; // text angle in 3600 system
bool mbInit; // true if maFontMetric member is valid
void AddFallbackForUnicode(sal_UCS4 cChar, FontWeight eWeight, const OUString& rFontName,
bool bEmbolden, const ItalicMatrix& rMatrix);
bool GetFallbackForUnicode(sal_UCS4 cInChar, FontWeight eInWeight, OUString* pOutFontName,
bool* pOutEmbolden, ItalicMatrix* pOutItalicMatrix) const;
void IgnoreFallbackForUnicode(sal_UCS4, FontWeight eWeight, std::u16string_view rFontName);
inline hb_font_t* GetHbFont();
bool IsGraphiteFont();
// NeedOffsetCorrection: Return if the font need offset correction in TTB direction.
// nYOffset is the original offset. It is used to check if the correction is necessary.
bool NeedOffsetCorrection(sal_Int32 nYOffset);
void SetAverageWidthFactor(double nFactor) { m_nAveWidthFactor = std::abs(nFactor); }
double GetAverageWidthFactor() const { return m_nAveWidthFactor; }
const vcl::font::FontSelectPattern& GetFontSelectPattern() const { return m_aFontSelData; }
const vcl::font::PhysicalFontFace* GetFontFace() const { return m_pFontFace.get(); }
vcl::font::PhysicalFontFace* GetFontFace() { return m_pFontFace.get(); }
const ImplFontCache* GetFontCache() const { return mpFontCache; }
bool GetGlyphBoundRect(sal_GlyphId, tools::Rectangle&, bool) const;
virtual bool GetGlyphOutline(sal_GlyphId, basegfx::B2DPolyPolygon&, bool) const = 0;
basegfx::B2DPolyPolygon GetGlyphOutlineUntransformed(sal_GlyphId) const;
sal_GlyphId GetGlyphIndex(uint32_t, uint32_t = 0) const;
double GetGlyphWidth(sal_GlyphId, bool = false, bool = true) const;
double GetKashidaWidth() const;
void GetScale(double* nXScale, double* nYScale) const;
bool NeedsArtificialItalic() const;
bool NeedsArtificialBold() const;
protected:
explicit LogicalFontInstance(const vcl::font::PhysicalFontFace&,
const vcl::font::FontSelectPattern&);
hb_font_t* InitHbFont();
virtual void ImplInitHbFont(hb_font_t*) {}
private:
hb_font_t* GetHbFontUntransformed() const;
struct MapEntry
{
OUString sFontName;
bool bEmbolden;
ItalicMatrix aItalicMatrix;
};
// cache of Unicode characters and replacement font names and attributes
// 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>, MapEntry> UnicodeFallbackList;
UnicodeFallbackList maUnicodeFallbackList;
mutable ImplFontCache* mpFontCache;
const vcl::font::FontSelectPattern m_aFontSelData;
hb_font_t* m_pHbFont;
mutable hb_font_t* m_pHbFontUntransformed = nullptr;
double m_nAveWidthFactor;
rtl::Reference<vcl::font::PhysicalFontFace> m_pFontFace;
std::optional<bool> m_xbIsGraphiteFont;
enum class FontFamilyEnum
{
Unclassified,
DFKaiSB
};
// The value is initialized and used in NeedOffsetCorrection().
std::optional<FontFamilyEnum> m_xeFontFamilyEnum;
mutable hb_draw_funcs_t* m_pHbDrawFuncs = nullptr;
basegfx::B2DPolygon m_aDrawPolygon;
};
inline hb_font_t* LogicalFontInstance::GetHbFont()
{
if (!m_pHbFont)
m_pHbFont = InitHbFont();
return m_pHbFont;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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