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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_GENERIC_GLYPHCACHE_HXX
#define INCLUDED_VCL_INC_GENERIC_GLYPHCACHE_HXX
#include <ft2build.h>
#include FT_FREETYPE_H
#include FT_GLYPH_H
#include <com/sun/star/i18n/XBreakIterator.hpp>
#include <tools/gen.hxx>
#include <vcl/dllapi.h>
#include <vcl/metric.hxx>
#include <fontinstance.hxx>
#include <sallayout.hxx>
#include "fontattributes.hxx"
#include "impfontmetricdata.hxx"
#include "hb-ot.h"
#include <unordered_map>
class FreetypeManager;
class FreetypeFontInfo;
class GlyphData;
class FontConfigFontOptions;
class PhysicalFontCollection;
class FreetypeFont;
class SvpGcpHelper;
namespace basegfx { class B2DPolyPolygon; }
namespace vcl { struct FontCapabilities; }
class VCL_DLLPUBLIC GlyphCache
{
public:
explicit GlyphCache();
virtual ~GlyphCache();
static GlyphCache& GetInstance();
void AddFontFile(
const OString& rNormalizedName,
int nFaceNum, sal_IntPtr nFontId,
const FontAttributes&);
void AnnounceFonts( PhysicalFontCollection* ) const;
FreetypeFont* CacheFont( const FontSelectPattern& );
void UncacheFont( FreetypeFont& );
void ClearFontCache();
void InvalidateAllGlyphs();
private:
friend class FreetypeFont;
// used by FreetypeFont class only
void AddedGlyph( FreetypeFont&, GlyphData& );
void RemovingGlyph();
void UsingGlyph( FreetypeFont&, GlyphData& );
private:
void GarbageCollect();
// the GlyphCache's FontList matches a font request to a serverfont instance
// the FontList key's mpFontData member is reinterpreted as integer font id
struct IFSD_Equal{ bool operator()( const FontSelectPattern&, const FontSelectPattern& ) const; };
struct IFSD_Hash{ size_t operator()( const FontSelectPattern& ) const; };
typedef std::unordered_map<FontSelectPattern,FreetypeFont*,IFSD_Hash,IFSD_Equal > FontList;
FontList maFontList;
sal_uLong mnMaxSize; // max overall cache size in bytes
mutable sal_uLong mnBytesUsed;
mutable long mnLruIndex;
mutable int mnGlyphCount;
FreetypeFont* mpCurrentGCFont;
FreetypeManager* mpFtManager;
};
class GlyphMetric
{
public:
GlyphMetric() : mnAdvanceWidth(0) {}
const Point& GetOffset() const { return maOffset; }
const Size& GetSize() const { return maSize; }
long GetCharWidth() const { return mnAdvanceWidth; }
protected:
friend class GlyphData;
void SetOffset( int nX, int nY ) { maOffset = Point( nX, nY); }
void SetDelta( int nX, int nY ) { maDelta = Point( nX, nY); }
void SetSize( const Size& s ) { maSize = s; }
void SetCharWidth( long nW ) { mnAdvanceWidth = nW; }
private:
long mnAdvanceWidth;
Point maDelta;
Point maOffset;
Size maSize;
};
class GlyphData
{
public:
GlyphData() : mnLruValue(0) {}
const GlyphMetric& GetMetric() const { return maGlyphMetric; }
void SetSize( const Size& s) { maGlyphMetric.SetSize( s ); }
void SetOffset( int nX, int nY ) { maGlyphMetric.SetOffset( nX, nY ); }
void SetDelta( int nX, int nY ) { maGlyphMetric.SetDelta( nX, nY ); }
void SetCharWidth( long nW ) { maGlyphMetric.SetCharWidth( nW ); }
void SetLruValue( int n ) const { mnLruValue = n; }
long GetLruValue() const { return mnLruValue;}
private:
GlyphMetric maGlyphMetric;
// used by GlyphCache for cache LRU algorithm
mutable long mnLruValue;
};
class VCL_DLLPUBLIC FreetypeFont final
{
public:
FreetypeFont( const FontSelectPattern&, FreetypeFontInfo* );
~FreetypeFont();
const OString& GetFontFileName() const;
int GetFontFaceIndex() const;
bool TestFont() const { return mbFaceOk;}
FT_Face GetFtFace() const;
int GetLoadFlags() const { return (mnLoadFlags & ~FT_LOAD_IGNORE_TRANSFORM); }
void SetFontOptions(const std::shared_ptr<FontConfigFontOptions>&);
const std::shared_ptr<FontConfigFontOptions>& GetFontOptions() const;
bool NeedsArtificialBold() const { return mbArtBold; }
bool NeedsArtificialItalic() const { return mbArtItalic; }
const FontSelectPattern& GetFontSelData() const { return maFontSelData; }
void GetFontMetric(ImplFontMetricDataRef&) const;
const unsigned char* GetTable( const char* pName, sal_uLong* pLength );
int GetEmUnits() const { return maFaceFT->units_per_EM;}
double GetStretch() { return mfStretch; }
const FontCharMapRef GetFontCharMap() const;
bool GetFontCapabilities(vcl::FontCapabilities &) const;
const GlyphMetric& GetGlyphMetric(sal_GlyphId aGlyphId);
sal_GlyphId GetGlyphIndex( sal_UCS4 ) const;
sal_GlyphId GetRawGlyphIndex( sal_UCS4, sal_UCS4 = 0 ) const;
sal_GlyphId FixupGlyphIndex( sal_GlyphId aGlyphId, sal_UCS4 ) const;
bool GetGlyphOutline( sal_GlyphId aGlyphId, basegfx::B2DPolyPolygon& ) const;
bool GetAntialiasAdvice() const;
hb_font_t* GetHbFont() { return mpHbFont; }
void SetHbFont( hb_font_t* pHbFont ) { mpHbFont = pHbFont; }
private:
friend class GlyphCache;
friend class FreetypeFontInstance;
friend class X11SalGraphics;
friend class CairoTextRender;
void AddRef() const { ++mnRefCount; }
long GetRefCount() const { return mnRefCount; }
long Release() const;
sal_uLong GetByteCount() const { return mnBytesUsed; }
void InitGlyphData( sal_GlyphId, GlyphData& ) const;
void GarbageCollect( long );
void ReleaseFromGarbageCollect();
void ApplyGlyphTransform( int nGlyphFlags, FT_GlyphRec_* ) const;
typedef std::unordered_map<int,GlyphData> GlyphList;
mutable GlyphList maGlyphList;
const FontSelectPattern maFontSelData;
// used by GlyphCache for cache LRU algorithm
mutable long mnRefCount;
mutable sal_uLong mnBytesUsed;
FreetypeFont* mpPrevGCFont;
FreetypeFont* mpNextGCFont;
// 16.16 fixed point values used for a rotated font
long mnCos;
long mnSin;
int mnWidth;
int mnPrioEmbedded;
int mnPrioAntiAlias;
int mnPrioAutoHint;
FreetypeFontInfo* mpFontInfo;
FT_Int mnLoadFlags;
double mfStretch;
FT_FaceRec_* maFaceFT;
FT_SizeRec_* maSizeFT;
mutable std::shared_ptr<FontConfigFontOptions> mxFontOptions;
bool mbFaceOk;
bool mbArtItalic;
bool mbArtBold;
bool mbUseGamma;
typedef std::unordered_map<int,int> GlyphSubstitution;
GlyphSubstitution maGlyphSubstitution;
hb_font_t* mpHbFont;
};
// a class for cache entries for physical font instances that are based on serverfonts
class VCL_DLLPUBLIC FreetypeFontInstance : public LogicalFontInstance
{
public:
FreetypeFontInstance( FontSelectPattern& );
virtual ~FreetypeFontInstance() override;
void SetFreetypeFont(FreetypeFont* p);
private:
FreetypeFont* mpFreetypeFont;
};
#endif // INCLUDED_VCL_INC_GENERIC_GLYPHCACHE_HXX
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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