1//========================================================================
2//
3// CairoFontEngine.h
4//
5// Copyright 2003 Glyph & Cog, LLC
6// Copyright 2004 Red Hat, Inc
7//
8//========================================================================
9
10//========================================================================
11//
12// Modified under the Poppler project - http://poppler.freedesktop.org
13//
14// All changes made under the Poppler project to this file are licensed
15// under GPL version 2 or later
16//
17// Copyright (C) 2005, 2006 Kristian Høgsberg <krh@redhat.com>
18// Copyright (C) 2005, 2018, 2019, 2021 Albert Astals Cid <aacid@kde.org>
19// Copyright (C) 2006, 2007 Jeff Muizelaar <jeff@infidigm.net>
20// Copyright (C) 2006, 2010 Carlos Garcia Campos <carlosgc@gnome.org>
21// Copyright (C) 2008, 2017, 2022 Adrian Johnson <ajohnson@redneon.com>
22// Copyright (C) 2013 Thomas Freitag <Thomas.Freitag@alfa.de>
23// Copyright (C) 2018 Adam Reichold <adam.reichold@t-online.de>
24// Copyright (C) 2022 Oliver Sander <oliver.sander@tu-dresden.de>
25// Copyright (C) 2022 Marek Kasik <mkasik@redhat.com>
26//
27// To see a description of the changes please see the Changelog file that
28// came with your tarball or type make ChangeLog if you are building from git
29//
30//========================================================================
31
32#ifndef CAIROFONTENGINE_H
33#define CAIROFONTENGINE_H
34
35#include <memory>
36#include <mutex>
37#include <unordered_map>
38#include <vector>
39
40#include "poppler-config.h"
41#include <cairo-ft.h>
42
43#include "GfxFont.h"
44#include "PDFDoc.h"
45
46class CairoFontEngine;
47
48class CairoFont
49{
50public:
51 CairoFont(Ref refA, cairo_font_face_t *cairo_font_faceA, std::vector<int> &&codeToGIDA, bool substituteA, bool printingA);
52 virtual ~CairoFont();
53 CairoFont(const CairoFont &) = delete;
54 CairoFont &operator=(const CairoFont &other) = delete;
55
56 virtual bool matches(Ref &other, bool printing);
57 cairo_font_face_t *getFontFace();
58 unsigned long getGlyph(CharCode code, const Unicode *u, int uLen);
59 double getSubstitutionCorrection(const std::shared_ptr<GfxFont> &gfxFont);
60
61 bool isSubstitute() { return substitute; }
62
63 Ref getRef() { return ref; }
64
65protected:
66 Ref ref;
67 cairo_font_face_t *cairo_font_face;
68
69 std::vector<int> codeToGID;
70
71 bool substitute;
72 bool printing;
73};
74
75//------------------------------------------------------------------------
76
77struct FreeTypeFontFace
78{
79 FT_Face face;
80 cairo_font_face_t *cairo_font_face;
81};
82
83class CairoFreeTypeFont : public CairoFont
84{
85public:
86 static CairoFreeTypeFont *create(const std::shared_ptr<GfxFont> &gfxFont, XRef *xref, FT_Library lib, CairoFontEngine *fontEngine, bool useCIDs);
87 ~CairoFreeTypeFont() override;
88
89private:
90 CairoFreeTypeFont(Ref ref, cairo_font_face_t *cairo_font_face, std::vector<int> &&codeToGID, bool substitute);
91
92 static std::optional<FreeTypeFontFace> getFreeTypeFontFace(CairoFontEngine *fontEngine, FT_Library lib, const std::string &filename, std::vector<unsigned char> &&data);
93};
94
95//------------------------------------------------------------------------
96
97class CairoType3Font : public CairoFont
98{
99public:
100 static CairoType3Font *create(const std::shared_ptr<GfxFont> &gfxFont, PDFDoc *doc, CairoFontEngine *fontEngine, bool printing, XRef *xref);
101 ~CairoType3Font() override;
102
103 bool matches(Ref &other, bool printing) override;
104
105private:
106 CairoType3Font(Ref ref, cairo_font_face_t *cairo_font_face, std::vector<int> &&codeToGIDA, bool printing, XRef *xref);
107};
108
109//------------------------------------------------------------------------
110
111//------------------------------------------------------------------------
112// CairoFontEngine
113//------------------------------------------------------------------------
114
115class CairoFontEngine
116{
117public:
118 // Create a font engine.
119 explicit CairoFontEngine(FT_Library libA);
120 ~CairoFontEngine();
121 CairoFontEngine(const CairoFontEngine &) = delete;
122 CairoFontEngine &operator=(const CairoFontEngine &other) = delete;
123
124 std::shared_ptr<CairoFont> getFont(const std::shared_ptr<GfxFont> &gfxFont, PDFDoc *doc, bool printing, XRef *xref);
125
126 static std::optional<FreeTypeFontFace> getExternalFontFace(FT_Library ftlib, const std::string &filename);
127
128private:
129 FT_Library lib;
130 bool useCIDs;
131 mutable std::mutex mutex;
132
133 // Cache of CairoFont for current document
134 // Most recently used is at the end of the vector.
135 static const size_t cairoFontCacheSize = 64;
136 std::vector<std::shared_ptr<CairoFont>> fontCache;
137
138 // Global cache of cairo_font_face_t for external font files.
139 static std::unordered_map<std::string, FreeTypeFontFace> fontFileCache;
140 static std::recursive_mutex fontFileCacheMutex;
141};
142
143#endif
144

source code of poppler/poppler/CairoFontEngine.h