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39
40 #ifndef QWINDOWSFONTDATABASE_H
41 #define QWINDOWSFONTDATABASE_H
42
43 //
44 // W A R N I N G
45 // -------------
46 //
47 // This file is not part of the Qt API. It exists purely as an
48 // implementation detail. This header file may change from version to
49 // version without notice, or even be removed.
50 //
51 // We mean it.
52 //
53
54 #include <qpa/qplatformfontdatabase.h>
55 #include <QtCore/QSharedPointer>
56 #include <QtCore/QLoggingCategory>
57 #include <QtCore/qt_windows.h>
58
59 #if !defined(QT_NO_DIRECTWRITE)
60 struct IDWriteFactory;
61 struct IDWriteGdiInterop;
62 #endif
63
64 QT_BEGIN_NAMESPACE
65
Q_DECLARE_LOGGING_CATEGORY(lcQpaFonts)66 Q_DECLARE_LOGGING_CATEGORY(lcQpaFonts)
67
68 class QWindowsFontEngineData
69 {
70 Q_DISABLE_COPY_MOVE(QWindowsFontEngineData)
71 public:
72 QWindowsFontEngineData();
73 ~QWindowsFontEngineData();
74
75 uint pow_gamma[256];
76
77 bool clearTypeEnabled = false;
78 qreal fontSmoothingGamma;
79 HDC hdc = 0;
80 #if !defined(QT_NO_DIRECTWRITE)
81 IDWriteFactory *directWriteFactory = nullptr;
82 IDWriteGdiInterop *directWriteGdiInterop = nullptr;
83 #endif
84 };
85
86 class QWindowsFontDatabase : public QPlatformFontDatabase
87 {
88 Q_DISABLE_COPY_MOVE(QWindowsFontDatabase)
89 public:
90 enum FontOptions {
91 // Relevant bits from QWindowsIntegration::Options
92 DontUseDirectWriteFonts = 0x40,
93 DontUseColorFonts = 0x80
94 };
95
96 QWindowsFontDatabase();
97 ~QWindowsFontDatabase() override;
98
99 void ensureFamilyPopulated(const QString &familyName);
100
101 void populateFontDatabase() override;
102 bool populateFamilyAliases(const QString &missingFamily) override;
103 void populateFamily(const QString &familyName) override;
104 QFontEngine *fontEngine(const QFontDef &fontDef, void *handle) override;
105 QFontEngine *fontEngine(const QByteArray &fontData, qreal pixelSize, QFont::HintingPreference hintingPreference) override;
106 QStringList fallbacksForFamily(const QString &family, QFont::Style style, QFont::StyleHint styleHint, QChar::Script script) const override;
107 QStringList addApplicationFont(const QByteArray &fontData, const QString &fileName) override;
108 void releaseHandle(void *handle) override;
109 QString fontDir() const override;
110
defaultFont()111 QFont defaultFont() const override { return systemDefaultFont(); }
112 bool fontsAlwaysScalable() const override;
113 void derefUniqueFont(const QString &uniqueFont);
114 void refUniqueFont(const QString &uniqueFont);
115 bool isPrivateFontFamily(const QString &family) const override;
116
117 static QFont systemDefaultFont();
118
119 static QFontEngine *createEngine(const QFontDef &request, const QString &faceName,
120 int dpi,
121 const QSharedPointer<QWindowsFontEngineData> &data);
122
123 static HFONT systemFont();
124 static QFont LOGFONT_to_QFont(const LOGFONT& lf, int verticalDPI = 0);
125
126 static qreal fontSmoothingGamma();
127 static LOGFONT fontDefToLOGFONT(const QFontDef &fontDef, const QString &faceName);
128
129 static QStringList extraTryFontsForFamily(const QString &family);
130 static QString familyForStyleHint(QFont::StyleHint styleHint);
131
132 static int defaultVerticalDPI();
133 static void setDefaultVerticalDPI(int d);
134
135 static void setFontOptions(unsigned options);
136 static unsigned fontOptions();
137
138 private:
139 void removeApplicationFonts();
140 void addDefaultEUDCFont();
141
142 struct WinApplicationFont {
143 HANDLE handle;
144 QString fileName;
145 };
146
147 QList<WinApplicationFont> m_applicationFonts;
148
149 struct UniqueFontData {
150 HANDLE handle;
151 QAtomicInt refCount;
152 };
153
154 QMap<QString, UniqueFontData> m_uniqueFontData;
155
156 static unsigned m_fontOptions;
157 QStringList m_eudcFonts;
158 bool m_hasPopulatedAliases = false;
159 };
160
161 #ifndef QT_NO_DEBUG_STREAM
162 QDebug operator<<(QDebug, const QFontDef &def);
163 #endif
164
qt_getUShort(const unsigned char * p)165 inline quint16 qt_getUShort(const unsigned char *p)
166 {
167 quint16 val;
168 val = *p++ << 8;
169 val |= *p;
170
171 return val;
172 }
173
174 struct QFontNames
175 {
176 QString name; // e.g. "DejaVu Sans Condensed"
177 QString style; // e.g. "Italic"
178 QString preferredName; // e.g. "DejaVu Sans"
179 QString preferredStyle; // e.g. "Condensed Italic"
180 };
181
182 struct QFontValues
183 {
184 quint16 weight = 0;
185 bool isItalic = false;
186 bool isOverstruck = false;
187 bool isUnderlined = false;
188 };
189
190 bool qt_localizedName(const QString &name);
191 QString qt_getEnglishName(const QString &familyName, bool includeStyle = false);
192 QFontNames qt_getCanonicalFontNames(const LOGFONT &lf);
193
194 QT_END_NAMESPACE
195
196 #endif // QWINDOWSFONTDATABASE_H
197