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qfontengine_p.h
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1// Copyright (C) 2021 The Qt Company Ltd.
2// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
3
4#ifndef QFONTENGINE_P_H
5#define QFONTENGINE_P_H
6
7//
8// W A R N I N G
9// -------------
10//
11// This file is not part of the Qt API. It exists purely as an
12// implementation detail. This header file may change from version to
13// version without notice, or even be removed.
14//
15// We mean it.
16//
17
18#include <QtGui/private/qtguiglobal_p.h>
19#include <QtGui/qfontvariableaxis.h>
20#include "QtCore/qatomic.h"
21#include <QtCore/qvarlengtharray.h>
22#include <QtCore/qhashfunctions.h>
23#include "private/qtextengine_p.h"
24#include "private/qfont_p.h"
25
26QT_BEGIN_NAMESPACE
27
28class QPainterPath;
29class QFontEngineGlyphCache;
30
31struct QGlyphLayout;
32
33// ### this only used in getPointInOutline(), refactor it and then remove these magic numbers
41
42typedef void (*qt_destroy_func_t) (void *user_data);
43typedef bool (*qt_get_font_table_func_t) (void *user_data, uint tag, uchar *buffer, uint *length);
44
45Q_DECLARE_LOGGING_CATEGORY(lcColrv1)
46
47class Q_GUI_EXPORT QFontEngine
48{
49public:
50 enum Type {
51 Box,
52 Multi,
53
54 // MS Windows types
55 Win,
56
57 // Apple Mac OS types
58 Mac,
59
60 // QWS types
61 Freetype,
62 QPF1,
63 QPF2,
64 Proxy,
65
66 DirectWrite,
67
68 TestFontEngine = 0x1000
69 };
70
71 enum GlyphFormat {
72 Format_None,
73 Format_Render = Format_None,
74 Format_Mono,
75 Format_A8,
76 Format_A32,
77 Format_ARGB
78 };
79
80 enum ShaperFlag {
81 DesignMetrics = 0x0002,
82 GlyphIndicesOnly = 0x0004,
83 FullStringFallback = 0x008
84 };
85 Q_DECLARE_FLAGS(ShaperFlags, ShaperFlag)
86
87 /* Used with the Freetype font engine. */
88 struct Glyph {
89 Glyph() = default;
90 ~Glyph() { delete [] data; }
91 short linearAdvance = 0;
92 unsigned short width = 0;
93 unsigned short height = 0;
94 short x = 0;
95 short y = 0;
96 short advance = 0;
97 signed char format = 0;
98 uchar *data = nullptr;
99 private:
100 Q_DISABLE_COPY(Glyph)
101 };
102
103 virtual ~QFontEngine();
104
105 inline Type type() const { return m_type; }
106
107 // all of these are in unscaled metrics if the engine supports uncsaled metrics,
108 // otherwise in design metrics
109 struct Properties {
110 QByteArray postscriptName;
111 QByteArray copyright;
112 QRectF boundingBox;
113 QFixed emSquare;
114 QFixed ascent;
115 QFixed descent;
116 QFixed leading;
117 QFixed italicAngle;
118 QFixed capHeight;
119 QFixed lineWidth;
120 };
121 virtual Properties properties() const;
122 virtual void getUnscaledGlyph(glyph_t glyph, QPainterPath *path, glyph_metrics_t *metrics);
123 QByteArray getSfntTable(uint tag) const;
124 virtual bool getSfntTableData(uint tag, uchar *buffer, uint *length) const;
125
126 struct FaceId {
127 FaceId() : index(0), instanceIndex(-1), encoding(0) {}
128 QByteArray filename;
129 QByteArray uuid;
130 int index;
131 int instanceIndex;
132 int encoding;
133 QMap<QFont::Tag, float> variableAxes;
134 };
135 virtual FaceId faceId() const { return FaceId(); }
136 enum SynthesizedFlags {
137 SynthesizedItalic = 0x1,
138 SynthesizedBold = 0x2,
139 SynthesizedStretch = 0x4
140 };
141 virtual int synthesized() const { return 0; }
142 inline bool supportsSubPixelPositions() const
143 {
144 return supportsHorizontalSubPixelPositions() || supportsVerticalSubPixelPositions();
145 }
146 virtual bool supportsHorizontalSubPixelPositions() const { return false; }
147 virtual bool supportsVerticalSubPixelPositions() const { return false; }
148 virtual QFixedPoint subPixelPositionFor(const QFixedPoint &position) const;
149 QFixed subPixelPositionForX(QFixed x) const
150 {
151 return subPixelPositionFor(QFixedPoint(x, 0)).x;
152 }
153
154 bool preferTypoLineMetrics() const;
155 bool isColorFont() const { return glyphFormat == Format_ARGB; }
156 static bool isIgnorableChar(char32_t ucs4)
157 {
158 return ucs4 == QChar::LineSeparator
159 || ucs4 == QChar::LineFeed
160 || ucs4 == QChar::CarriageReturn
161 || ucs4 == QChar::ParagraphSeparator
162 || (!disableEmojiSegmenter() && (ucs4 & 0xFFF0) == 0xFE00)
163 || QChar::category(ucs4) == QChar::Other_Control;
164 }
165
166 static int maxCachedGlyphSize();
167
168 virtual QFixed emSquareSize() const;
169
170 /* returns 0 as glyph index for non existent glyphs */
171 virtual glyph_t glyphIndex(uint ucs4) const = 0;
172 virtual int stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs, ShaperFlags flags) const = 0;
173 virtual void recalcAdvances(QGlyphLayout *, ShaperFlags) const {}
174 virtual void doKerning(QGlyphLayout *, ShaperFlags) const;
175
176 virtual void addGlyphsToPath(glyph_t *glyphs, QFixedPoint *positions, int nglyphs,
177 QPainterPath *path, QTextItem::RenderFlags flags);
178
179 void getGlyphPositions(const QGlyphLayout &glyphs, const QTransform &matrix, QTextItem::RenderFlags flags,
180 QVarLengthArray<glyph_t> &glyphs_out, QVarLengthArray<QFixedPoint> &positions);
181
182 virtual void addOutlineToPath(qreal, qreal, const QGlyphLayout &, QPainterPath *, QTextItem::RenderFlags flags);
183 void addBitmapFontToPath(qreal x, qreal y, const QGlyphLayout &, QPainterPath *, QTextItem::RenderFlags);
184 /**
185 * Create a qimage with the alpha values for the glyph.
186 * Returns an image indexed_8 with index values ranging from 0=fully transparent to 255=opaque
187 */
188 // ### Refactor this into a smaller and more flexible API.
189 virtual QImage alphaMapForGlyph(glyph_t);
190 virtual QImage alphaMapForGlyph(glyph_t glyph, const QFixedPoint &subPixelPosition);
191 virtual QImage alphaMapForGlyph(glyph_t, const QTransform &t);
192 virtual QImage alphaMapForGlyph(glyph_t, const QFixedPoint &subPixelPosition, const QTransform &t);
193 virtual QImage alphaRGBMapForGlyph(glyph_t, const QFixedPoint &subPixelPosition, const QTransform &t);
194 virtual QImage bitmapForGlyph(glyph_t, const QFixedPoint &subPixelPosition, const QTransform &t, const QColor &color = QColor());
195 QImage renderedPathForGlyph(glyph_t glyph, const QColor &color);
196 virtual Glyph *glyphData(glyph_t glyph, const QFixedPoint &subPixelPosition, GlyphFormat neededFormat, const QTransform &t);
197 virtual bool hasInternalCaching() const { return false; }
198
199 virtual glyph_metrics_t alphaMapBoundingBox(glyph_t glyph, const QFixedPoint &/*subPixelPosition*/, const QTransform &matrix, GlyphFormat /*format*/)
200 {
201 return boundingBox(glyph, matrix);
202 }
203
204 virtual void removeGlyphFromCache(glyph_t);
205
206 virtual glyph_metrics_t boundingBox(const QGlyphLayout &glyphs);
207 virtual glyph_metrics_t boundingBox(glyph_t glyph) = 0;
208 virtual glyph_metrics_t boundingBox(glyph_t glyph, const QTransform &matrix);
209 glyph_metrics_t tightBoundingBox(const QGlyphLayout &glyphs, QTextItem::RenderFlags flags);
210
211 virtual QFixed ascent() const;
212 virtual QFixed capHeight() const = 0;
213 virtual QFixed descent() const;
214 virtual QFixed leading() const;
215 virtual QFixed xHeight() const;
216 virtual QFixed averageCharWidth() const;
217
218 virtual QFixed lineThickness() const;
219 virtual QFixed underlinePosition() const;
220
221 virtual qreal maxCharWidth() const = 0;
222 virtual qreal minLeftBearing() const;
223 virtual qreal minRightBearing() const;
224
225 virtual void getGlyphBearings(glyph_t glyph, qreal *leftBearing = nullptr, qreal *rightBearing = nullptr);
226
227 inline bool canRender(uint ucs4) const { return glyphIndex(ucs4) != 0; }
228 virtual bool canRender(const QChar *str, int len) const;
229
230 virtual bool supportsTransformation(const QTransform &transform) const;
231
232 virtual int glyphCount() const;
233 virtual int glyphMargin(GlyphFormat format) { return format == Format_A32 ? 2 : 0; }
234 bool hasHinting() const;
235
236 virtual QFontEngine *cloneWithSize(qreal /*pixelSize*/) const { return nullptr; }
237
238 virtual Qt::HANDLE handle() const;
239
240 virtual QList<QFontVariableAxis> variableAxes() const;
241
242 virtual QString glyphName(glyph_t index) const;
243 virtual glyph_t findGlyph(QLatin1StringView name) const;
244
245 void *harfbuzzFont() const;
246 void *harfbuzzFace() const;
247 bool supportsScript(QChar::Script script) const;
248
249 inline static bool scriptRequiresOpenType(QChar::Script script)
250 {
251 return ((script >= QChar::Script_Syriac && script <= QChar::Script_Sinhala)
252 || script == QChar::Script_Khmer || script == QChar::Script_Nko);
253 }
254
255 virtual int getPointInOutline(glyph_t glyph, int flags, quint32 point, QFixed *xpos, QFixed *ypos, quint32 *nPoints);
256
257 void clearGlyphCache(const void *key);
258 void setGlyphCache(const void *key, QFontEngineGlyphCache *data);
259 QFontEngineGlyphCache *glyphCache(const void *key, GlyphFormat format, const QTransform &transform, const QColor &color = QColor()) const;
260
261 static const uchar *getCMap(const uchar *table, uint tableSize, bool *isSymbolFont, int *cmapSize);
262 static quint32 getTrueTypeGlyphIndex(const uchar *cmap, int cmapSize, uint unicode);
263
264 static QByteArray convertToPostscriptFontFamilyName(const QByteArray &fontFamily);
265
266 virtual bool hasUnreliableGlyphOutline() const;
267 virtual bool expectsGammaCorrectedBlending(QFontEngine::GlyphFormat format) const;
268
269 static bool disableEmojiSegmenter();
270
271 enum HintStyle {
272 HintNone,
273 HintLight,
274 HintMedium,
275 HintFull
276 };
277 virtual void setDefaultHintStyle(HintStyle) { }
278
279 enum SubpixelAntialiasingType {
280 Subpixel_None,
281 Subpixel_RGB,
282 Subpixel_BGR,
283 Subpixel_VRGB,
284 Subpixel_VBGR
285 };
286
287private:
288 const Type m_type;
289
290public:
291 QAtomicInt ref;
292 QFontDef fontDef;
293
294 class Holder { // replace by std::unique_ptr once available
295 void *ptr;
296 qt_destroy_func_t destroy_func;
297 public:
298 Holder() : ptr(nullptr), destroy_func(nullptr) {}
299 explicit Holder(void *p, qt_destroy_func_t d) : ptr(p), destroy_func(d) {}
300 ~Holder() { if (ptr && destroy_func) destroy_func(ptr); }
301 Holder(Holder &&other) noexcept
302 : ptr(std::exchange(other.ptr, nullptr)),
303 destroy_func(std::exchange(other.destroy_func, nullptr))
304 {
305 }
306 QT_MOVE_ASSIGNMENT_OPERATOR_IMPL_VIA_PURE_SWAP(Holder)
307
308 void swap(Holder &other) noexcept
309 {
310 qSwap(ptr, other.ptr);
311 qSwap(destroy_func, other.destroy_func);
312 }
313
314 void *get() const noexcept { return ptr; }
315 void *release() noexcept {
316 void *result = ptr;
317 ptr = nullptr;
318 destroy_func = nullptr;
319 return result;
320 }
321 void reset() noexcept { Holder().swap(*this); }
322 qt_destroy_func_t get_deleter() const noexcept { return destroy_func; }
323
324 bool operator!() const noexcept { return !ptr; }
325 };
326
327 mutable Holder font_; // \ NOTE: Declared before m_glyphCaches, so font_, face_
328 mutable Holder face_; // / are destroyed _after_ m_glyphCaches is destroyed.
329
330 struct FaceData {
331 void *user_data;
332 qt_get_font_table_func_t get_font_table;
333 } faceData;
334
335 uint cache_cost; // amount of mem used in bytes by the font
336 uint fsType : 16;
337 bool symbol;
338 bool isSmoothlyScalable;
339 struct KernPair {
340 uint left_right;
341 QFixed adjust;
342
343 inline bool operator<(const KernPair &other) const
344 {
345 return left_right < other.left_right;
346 }
347 };
348 QList<KernPair> kerning_pairs;
349 void loadKerningPairs(QFixed scalingFactor);
350
351 GlyphFormat glyphFormat;
352 int m_subPixelPositionCount; // Number of positions within a single pixel for this cache
353
354protected:
355 explicit QFontEngine(Type type);
356
357 QFixed firstLeftBearing(const QGlyphLayout &glyphs);
358 QFixed lastRightBearing(const QGlyphLayout &glyphs);
359
360 QFixed calculatedCapHeight() const;
361
362 mutable QFixed m_ascent;
363 mutable QFixed m_descent;
364 mutable QFixed m_leading;
365 mutable bool m_heightMetricsQueried;
366
367 virtual void initializeHeightMetrics() const;
368 bool processHheaTable() const;
369 bool processOS2Table() const;
370
371private:
372 struct GlyphCacheEntry {
373 GlyphCacheEntry();
374 GlyphCacheEntry(const GlyphCacheEntry &);
375 ~GlyphCacheEntry();
376
377 GlyphCacheEntry &operator=(const GlyphCacheEntry &);
378
379 QExplicitlySharedDataPointer<QFontEngineGlyphCache> cache;
380 bool operator==(const GlyphCacheEntry &other) const { return cache == other.cache; }
381 };
382 typedef std::list<GlyphCacheEntry> GlyphCaches;
383 mutable QHash<const void *, GlyphCaches> m_glyphCaches;
384
385private:
386 mutable qreal m_minLeftBearing;
387 mutable qreal m_minRightBearing;
388 mutable int m_hasHinting = -1;
389};
390Q_DECLARE_TYPEINFO(QFontEngine::KernPair, Q_PRIMITIVE_TYPE);
391
392Q_DECLARE_OPERATORS_FOR_FLAGS(QFontEngine::ShaperFlags)
393
394inline bool operator ==(const QFontEngine::FaceId &f1, const QFontEngine::FaceId &f2)
395{
396 return f1.index == f2.index
397 && f1.encoding == f2.encoding
398 && f1.filename == f2.filename
399 && f1.uuid == f2.uuid
400 && f1.instanceIndex == f2.instanceIndex
401 && f1.variableAxes == f2.variableAxes;
402}
403
404inline size_t qHash(const QFontEngine::FaceId &f, size_t seed = 0)
405 noexcept(noexcept(qHash(f.filename)))
406{
407 return qHashMulti(seed, f.filename, f.uuid, f.index, f.instanceIndex, f.encoding, f.variableAxes.keys(), f.variableAxes.values());
408}
409
410
411class QGlyph;
412
413
414
415class QFontEngineBox : public QFontEngine
416{
417public:
418 QFontEngineBox(int size);
419 ~QFontEngineBox();
420
421 virtual glyph_t glyphIndex(uint ucs4) const override;
422 virtual int stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs, ShaperFlags flags) const override;
423 virtual void recalcAdvances(QGlyphLayout *, ShaperFlags) const override;
424
425 void draw(QPaintEngine *p, qreal x, qreal y, const QTextItemInt &si);
426 virtual void addOutlineToPath(qreal x, qreal y, const QGlyphLayout &glyphs, QPainterPath *path, QTextItem::RenderFlags flags) override;
427
428 virtual glyph_metrics_t boundingBox(const QGlyphLayout &glyphs) override;
429 virtual glyph_metrics_t boundingBox(glyph_t glyph) override;
430 virtual QFontEngine *cloneWithSize(qreal pixelSize) const override;
431
432 virtual QFixed emSquareSize() const override { return _size; }
433 virtual QFixed ascent() const override;
434 virtual QFixed capHeight() const override;
435 virtual QFixed descent() const override;
436 virtual QFixed leading() const override;
437 virtual qreal maxCharWidth() const override;
438 virtual qreal minLeftBearing() const override { return 0; }
439 virtual qreal minRightBearing() const override { return 0; }
440 virtual QImage alphaMapForGlyph(glyph_t) override;
441
442 virtual bool canRender(const QChar *string, int len) const override;
443
444 inline int size() const { return _size; }
445
446protected:
447 explicit QFontEngineBox(Type type, int size);
448
449private:
450 friend class QFontPrivate;
451 int _size;
452};
453
454class Q_GUI_EXPORT QFontEngineMulti : public QFontEngine
455{
456public:
457 explicit QFontEngineMulti(QFontEngine *engine, int script, const QStringList &fallbackFamilies = QStringList());
458 ~QFontEngineMulti();
459
460 virtual int glyphCount() const override;
461 virtual glyph_t glyphIndex(uint ucs4) const override;
462 virtual int stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs, ShaperFlags flags) const override;
463
464 virtual glyph_metrics_t boundingBox(const QGlyphLayout &glyphs) override;
465 virtual glyph_metrics_t boundingBox(glyph_t glyph) override;
466
467 virtual void recalcAdvances(QGlyphLayout *, ShaperFlags) const override;
468 virtual void doKerning(QGlyphLayout *, ShaperFlags) const override;
469 virtual void addOutlineToPath(qreal, qreal, const QGlyphLayout &, QPainterPath *, QTextItem::RenderFlags flags) override;
470 virtual void getGlyphBearings(glyph_t glyph, qreal *leftBearing = nullptr, qreal *rightBearing = nullptr) override;
471
472 virtual QFixed emSquareSize() const override;
473 virtual QFixed ascent() const override;
474 virtual QFixed capHeight() const override;
475 virtual QFixed descent() const override;
476 virtual QFixed leading() const override;
477 virtual QFixed xHeight() const override;
478 virtual QFixed averageCharWidth() const override;
479 virtual QImage alphaMapForGlyph(glyph_t) override;
480 virtual QImage alphaMapForGlyph(glyph_t glyph, const QFixedPoint &subPixelPosition) override;
481 virtual QImage alphaMapForGlyph(glyph_t, const QTransform &t) override;
482 virtual QImage alphaMapForGlyph(glyph_t, const QFixedPoint &subPixelPosition, const QTransform &t) override;
483 virtual QImage alphaRGBMapForGlyph(glyph_t, const QFixedPoint &subPixelPosition, const QTransform &t) override;
484
485 virtual QFixed lineThickness() const override;
486 virtual QFixed underlinePosition() const override;
487 virtual qreal maxCharWidth() const override;
488 virtual qreal minLeftBearing() const override;
489 virtual qreal minRightBearing() const override;
490
491 virtual QList<QFontVariableAxis> variableAxes() const override;
492
493 virtual bool canRender(const QChar *string, int len) const override;
494 QString glyphName(glyph_t glyph) const override;
495 glyph_t findGlyph(QLatin1StringView name) const override;
496
497 inline int fallbackFamilyCount() const { return m_fallbackFamilies.size(); }
498 inline QString fallbackFamilyAt(int at) const { return m_fallbackFamilies.at(at); }
499
500 void setFallbackFamiliesList(const QStringList &fallbackFamilies);
501
502 static uchar highByte(glyph_t glyph); // Used for determining engine
503
504 inline QFontEngine *engine(int at) const
505 { Q_ASSERT(at < m_engines.size()); return m_engines.at(at); }
506
507 void ensureEngineAt(int at);
508
509 static QFontEngine *createMultiFontEngine(QFontEngine *fe, int script);
510
511protected:
512 virtual void ensureFallbackFamiliesQueried();
513 virtual bool shouldLoadFontEngineForCharacter(int at, uint ucs4) const;
514 virtual QFontEngine *loadEngine(int at);
515
516private:
517 QList<QFontEngine *> m_engines;
518 QStringList m_fallbackFamilies;
519 const int m_script;
520 bool m_fallbackFamiliesQueried;
521};
522
523class QTestFontEngine : public QFontEngineBox
524{
525public:
526 QTestFontEngine(int size);
527};
528
529QT_END_NAMESPACE
530
531
532
533#endif // QFONTENGINE_P_H
QByteArray
\inmodule QtCore
Definition qbytearray.h:58
QFontEngineBox::emSquareSize
virtual QFixed emSquareSize() const override
Definition qfontengine_p.h:432
QFontEngineBox::boundingBox
virtual glyph_metrics_t boundingBox(glyph_t glyph) override
Definition qfontengine.cpp:1829
QFontEngineBox::alphaMapForGlyph
virtual QImage alphaMapForGlyph(glyph_t) override
Definition qfontengine.cpp:1871
QFontEngineBox::maxCharWidth
virtual qreal maxCharWidth() const override
Definition qfontengine.cpp:1861
QFontEngineBox::cloneWithSize
virtual QFontEngine * cloneWithSize(qreal pixelSize) const override
Definition qfontengine.cpp:1834
QFontEngineBox::size
int size() const
Definition qfontengine_p.h:444
QFontEngineBox::minLeftBearing
virtual qreal minLeftBearing() const override
Definition qfontengine_p.h:438
QFontEngineBox::stringToCMap
virtual int stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs, ShaperFlags flags) const override
Definition qfontengine.cpp:1748
QFontEngineBox::leading
virtual QFixed leading() const override
Definition qfontengine.cpp:1855
QFontEngineBox::canRender
virtual bool canRender(const QChar *string, int len) const override
Definition qfontengine.cpp:1866
QFontEngineBox::descent
virtual QFixed descent() const override
Definition qfontengine.cpp:1850
QFontEngineBox::recalcAdvances
virtual void recalcAdvances(QGlyphLayout *, ShaperFlags) const override
Definition qfontengine.cpp:1772
QFontEngineBox::boundingBox
virtual glyph_metrics_t boundingBox(const QGlyphLayout &glyphs) override
Definition qfontengine.cpp:1793
QFontEngineBox::QFontEngineBox
QFontEngineBox(Type type, int size)
Definition qfontengine.cpp:1731
QFontEngineBox::ascent
virtual QFixed ascent() const override
Definition qfontengine.cpp:1840
QFontEngineBox::capHeight
virtual QFixed capHeight() const override
Definition qfontengine.cpp:1845
QFontEngineBox::minRightBearing
virtual qreal minRightBearing() const override
Definition qfontengine_p.h:439
QFontEngineBox::QFontEngineBox
QFontEngineBox(int size)
Definition qfontengine.cpp:1724
QMutexLocker
\inmodule QtCore
Definition qmutex.h:346
QPainter::QFontEngine
friend class QFontEngine
Definition qpainter.h:433
QRecursiveMutex
\inmodule QtCore
Definition qmutex.h:342
QTestFontEngine::QTestFontEngine
QTestFontEngine(int size)
Definition qfontengine.cpp:2592
QT_BEGIN_NAMESPACE
Combined button and popup list for selecting options.
Definition qrandomaccessasyncfile_darwin.mm:17
QStringList
QList< QString > QStringList
Constructs a string list that contains the given string, str.
Definition qcontainerfwd.h:41
qApp
#define qApp
Definition qcoreapplication.h:38
Q_DECLARE_TYPEINFO
Q_DECLARE_TYPEINFO(QDateTime::Data, Q_RELOCATABLE_TYPE)
Q_TRACE_POINT
Q_TRACE_POINT(qtcore, QFactoryLoader_update, const QString &fileName)
qt_fontdatabase_mutex
QRecursiveMutex * qt_fontdatabase_mutex()
Definition qfontdatabase.cpp:537
familySupportsWritingSystem
static bool familySupportsWritingSystem(QtFontFamily *family, size_t writingSystem)
Definition qfontdatabase.cpp:409
qt_registerFont
void qt_registerFont(const QString &familyName, const QString &stylename, const QString &foundryname, int weight, QFont::Style style, int stretch, bool antialiased, bool scalable, int pixelSize, bool fixedPitch, bool colorFont, const QSupportedWritingSystems &writingSystems, void *handle)
Definition qfontdatabase.cpp:548
equalsCaseInsensitive
static bool equalsCaseInsensitive(const QString &a, const QString &b)
Definition qfontdatabase.cpp:261
parseFontName
static void parseFontName(const QString &name, QString &foundry, QString &family)
Definition qfontdatabase.cpp:441
scriptForWritingSystem
static const int scriptForWritingSystem[]
Definition qfontdatabase.cpp:358
qt_isFontFamilyPopulated
bool qt_isFontFamilyPopulated(const QString &familyName)
Definition qfontdatabase.cpp:623
SMOOTH_SCALABLE
#define SMOOTH_SCALABLE
Definition qfontdatabase.cpp:40
styleStringHelper
static QString styleStringHelper(int weight, QFont::Style style)
Definition qfontdatabase.cpp:1130
getFontWeight
static int getFontWeight(const QString &weightString)
Definition qfontdatabase.cpp:56
matchFamilyName
static bool matchFamilyName(const QString &familyName, QtFontFamily *f)
Definition qfontdatabase.cpp:1028
qt_script_for_writing_system
Q_GUI_EXPORT int qt_script_for_writing_system(QFontDatabase::WritingSystem writingSystem)
Definition qfontdatabase.cpp:397
Q_TRACE_POINT
Q_TRACE_POINT(qtgui, QFontDatabase_loadEngine, const QString &families, int pointSize)
fallbacksForFamily
static QStringList fallbacksForFamily(const QString &family, QFont::Style style, QFont::StyleHint styleHint, QFontDatabasePrivate::ExtendedScript script)
Definition qfontdatabase.cpp:679
initFontDef
static void initFontDef(const QtFontDesc &desc, const QFontDef &request, QFontDef *fontDef, bool multi)
Definition qfontdatabase.cpp:485
qt_fallbacksForFamily
QStringList qt_fallbacksForFamily(const QString &family, QFont::Style style, QFont::StyleHint styleHint, QFontDatabasePrivate::ExtendedScript script)
Definition qfontdatabase.cpp:716
qt_registerFontFamily
void qt_registerFontFamily(const QString &familyName)
Definition qfontdatabase.cpp:586
qt_registerAliasToFontFamily
void qt_registerAliasToFontFamily(const QString &familyName, const QString &alias)
Definition qfontdatabase.cpp:594
qt_resolveFontFamilyAlias
QString qt_resolveFontFamilyAlias(const QString &alias)
Definition qfontdatabase.cpp:612
familyList
static QStringList familyList(const QFontDef &req)
Definition qfontdatabase.cpp:513
qt_cleanupFontDatabase
void qt_cleanupFontDatabase()
Definition qfontdatabase.cpp:529
bestStyle
static QtFontStyle * bestStyle(QtFontFoundry *foundry, const QtFontStyle::Key &styleKey, const QString &styleName=QString())
Definition qfontdatabase.cpp:852
operator==
bool operator==(const QtFontFallbacksCacheKey &lhs, const QtFontFallbacksCacheKey &rhs) noexcept
Definition qfontdatabase_p.h:39
qHash
size_t qHash(const QtFontFallbacksCacheKey &key, size_t seed=0) noexcept
Definition qfontdatabase_p.h:52
operator!=
bool operator!=(const QtFontFallbacksCacheKey &lhs, const QtFontFallbacksCacheKey &rhs) noexcept
Definition qfontdatabase_p.h:47
qt_get_font_table_func_t
bool(* qt_get_font_table_func_t)(void *user_data, uint tag, uchar *buffer, uint *length)
Definition qfontengine_p.h:43
qt_destroy_func_t
void(* qt_destroy_func_t)(void *user_data)
Definition qfontengine_p.h:42
HB_Compat_Error
HB_Compat_Error
Definition qfontengine_p.h:34
Err_Invalid_SubTable_Format
@ Err_Invalid_SubTable_Format
Definition qfontengine_p.h:38
Err_Invalid_SubTable
@ Err_Invalid_SubTable
Definition qfontengine_p.h:39
Err_Invalid_Argument
@ Err_Invalid_Argument
Definition qfontengine_p.h:37
Err_Ok
@ Err_Ok
Definition qfontengine_p.h:35
Err_Not_Covered
@ Err_Not_Covered
Definition qfontengine_p.h:36
qGuiApp
#define qGuiApp
Definition qguiapplication.h:35
Q_LOGGING_CATEGORY
#define Q_LOGGING_CATEGORY(name,...)
Definition qloggingcategory.h:147
qCInfo
#define qCInfo(category,...)
Definition qloggingcategory.h:163
qCWarning
#define qCWarning(category,...)
Definition qloggingcategory.h:164
qCDebug
#define qCDebug(category,...)
Definition qloggingcategory.h:162
Q_DECLARE_LOGGING_CATEGORY
#define Q_DECLARE_LOGGING_CATEGORY(name)
Definition qloggingcategory.h:141
qHash
constexpr size_t qHash(const QSize &s, size_t seed=0) noexcept
Definition qsize.h:192
QtFontDesc::family
QtFontFamily * family
Definition qfontdatabase.cpp:479
QtFontDesc::size
QtFontSize * size
Definition qfontdatabase.cpp:482
QtFontDesc::style
QtFontStyle * style
Definition qfontdatabase.cpp:481
QtFontDesc::foundry
QtFontFoundry * foundry
Definition qfontdatabase.cpp:480
QtFontFallbacksCacheKey::styleHint
QFont::StyleHint styleHint
Definition qfontdatabase_p.h:35
QtFontFoundry::style
QtFontStyle * style(const QtFontStyle::Key &, const QString &=QString(), StyleRetrievalFlags flags=NoRetrievalFlags)
Definition qfontdatabase.cpp:197
QtFontFoundry::styles
QtFontStyle ** styles
Definition qfontdatabase_p.h:141