source: branches/4.5.1/src/gui/text/qfontengine_p.h

Last change on this file was 125, checked in by Dmitry A. Kuminov, 16 years ago

gui: Added QFontEnginePMFT that makes use of FreeType to render fonts and enabled by default (no proper font matching yet, HELV.PFB is always used so far).
File size: 20.5 KB
Line 
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41
42#ifndef QFONTENGINE_P_H
43#define QFONTENGINE_P_H
44
45//
46// W A R N I N G
47// -------------
48//
49// This file is not part of the Qt API. It exists purely as an
50// implementation detail. This header file may change from version to
51// version without notice, or even be removed.
52//
53// We mean it.
54//
55
56#include "QtCore/qglobal.h"
57#include "QtCore/qatomic.h"
58#include <QtCore/qvarlengtharray.h>
59#include "private/qtextengine_p.h"
60#include "private/qfont_p.h"
61
62#ifdef Q_WS_WIN
63# include "QtCore/qt_windows.h"
64#endif
65
66#ifdef Q_WS_MAC
67# include "private/qt_mac_p.h"
68# include "QtCore/qmap.h"
69# include "QtCore/qcache.h"
70# include "private/qcore_mac_p.h"
71#endif
72
73#include "qfontengineglyphcache_p.h"
74
75struct glyph_metrics_t;
76typedef unsigned int glyph_t;
77
78QT_BEGIN_NAMESPACE
79
80class QChar;
81class QPainterPath;
82
83class QTextEngine;
84struct QGlyphLayout;
85
86#define MAKE_TAG(ch1, ch2, ch3, ch4) (\
87 (((quint32)(ch1)) << 24) | \
88 (((quint32)(ch2)) << 16) | \
89 (((quint32)(ch3)) << 8) | \
90 ((quint32)(ch4)) \
91 )
92
93
94class Q_GUI_EXPORT QFontEngine : public QObject
95{
96 Q_OBJECT
97public:
98 enum Type {
99 Box,
100 Multi,
101
102 // X11 types
103 XLFD,
104
105 // MS Windows types
106 Win,
107
108 // Apple Mac OS types
109 Mac,
110
111 // Trolltech QWS types
112 Freetype,
113 QPF1,
114 QPF2,
115 Proxy,
116 TestFontEngine = 0x1000
117 };
118
119 QFontEngine();
120 virtual ~QFontEngine();
121
122 // all of these are in unscaled metrics if the engine supports uncsaled metrics,
123 // otherwise in design metrics
124 struct Properties {
125 QByteArray postscriptName;
126 QByteArray copyright;
127 QRectF boundingBox;
128 QFixed emSquare;
129 QFixed ascent;
130 QFixed descent;
131 QFixed leading;
132 QFixed italicAngle;
133 QFixed capHeight;
134 QFixed lineWidth;
135 };
136 virtual Properties properties() const;
137 virtual void getUnscaledGlyph(glyph_t glyph, QPainterPath *path, glyph_metrics_t *metrics);
138 QByteArray getSfntTable(uint /*tag*/) const;
139 virtual bool getSfntTableData(uint /*tag*/, uchar * /*buffer*/, uint * /*length*/) const { return false; }
140
141 struct FaceId {
142 FaceId() : index(0), encoding(0) {}
143 QByteArray filename;
144 int index;
145 int encoding;
146 };
147 virtual FaceId faceId() const { return FaceId(); }
148 enum SynthesizedFlags {
149 SynthesizedItalic = 0x1,
150 SynthesizedBold = 0x2,
151 SynthesizedStretch = 0x4
152 };
153 virtual int synthesized() const { return 0; }
154
155 virtual QFixed emSquareSize() const { return ascent(); }
156
157 /* returns 0 as glyph index for non existant glyphs */
158 virtual bool stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs, QTextEngine::ShaperFlags flags) const = 0;
159
160 /**
161 * This is a callback from harfbuzz. The font engine uses the font-system in use to find out the
162 * advances of each glyph and set it on the layout.
163 */
164 virtual void recalcAdvances(QGlyphLayout *, QTextEngine::ShaperFlags) const {}
165 virtual void doKerning(QGlyphLayout *, QTextEngine::ShaperFlags) const;
166
167#if !defined(Q_WS_X11) && !defined(Q_WS_WIN) && !defined(Q_WS_PM) && !defined(Q_WS_MAC)
168 virtual void draw(QPaintEngine *p, qreal x, qreal y, const QTextItemInt &si) = 0;
169#endif
170 virtual void addGlyphsToPath(glyph_t *glyphs, QFixedPoint *positions, int nglyphs,
171 QPainterPath *path, QTextItem::RenderFlags flags);
172 void getGlyphPositions(const QGlyphLayout &glyphs, const QTransform &matrix, QTextItem::RenderFlags flags,
173 QVarLengthArray<glyph_t> &glyphs_out, QVarLengthArray<QFixedPoint> &positions);
174
175 virtual void addOutlineToPath(qreal, qreal, const QGlyphLayout &, QPainterPath *, QTextItem::RenderFlags flags);
176 void addBitmapFontToPath(qreal x, qreal y, const QGlyphLayout &, QPainterPath *, QTextItem::RenderFlags);
177 /**
178 * Create a qimage with the alpha values for the glyph.
179 * Returns an image indexed_8 with index values ranging from 0=fully transparant to 255=opaque
180 */
181 virtual QImage alphaMapForGlyph(glyph_t) = 0;
182 virtual QImage alphaMapForGlyph(glyph_t, const QTransform &t);
183 virtual QImage alphaRGBMapForGlyph(glyph_t, int margin, const QTransform &t);
184
185 virtual void removeGlyphFromCache(glyph_t);
186
187 virtual glyph_metrics_t boundingBox(const QGlyphLayout &glyphs) = 0;
188 virtual glyph_metrics_t boundingBox(glyph_t glyph) = 0;
189 virtual glyph_metrics_t boundingBox(glyph_t glyph, const QTransform &matrix);
190 glyph_metrics_t tightBoundingBox(const QGlyphLayout &glyphs);
191
192 virtual QFixed ascent() const = 0;
193 virtual QFixed descent() const = 0;
194 virtual QFixed leading() const = 0;
195 virtual QFixed xHeight() const;
196 virtual QFixed averageCharWidth() const;
197
198 virtual QFixed lineThickness() const;
199 virtual QFixed underlinePosition() const;
200
201 virtual qreal maxCharWidth() const = 0;
202 virtual qreal minLeftBearing() const { return qreal(); }
203 virtual qreal minRightBearing() const { return qreal(); }
204
205 virtual const char *name() const = 0;
206
207 virtual bool canRender(const QChar *string, int len) = 0;
208
209 virtual Type type() const = 0;
210
211 virtual int glyphCount() const;
212
213 HB_Font harfbuzzFont() const;
214 HB_Face harfbuzzFace() const;
215
216 virtual HB_Error getPointInOutline(HB_Glyph glyph, int flags, hb_uint32 point, HB_Fixed *xpos, HB_Fixed *ypos, hb_uint32 *nPoints);
217
218 void setGlyphCache(void *key, QFontEngineGlyphCache *data);
219 void setGlyphCache(QFontEngineGlyphCache::Type key, QFontEngineGlyphCache *data);
220 QFontEngineGlyphCache *glyphCache(void *key, const QTransform &transform) const;
221 QFontEngineGlyphCache *glyphCache(QFontEngineGlyphCache::Type key, const QTransform &transform) const;
222
223 static const uchar *getCMap(const uchar *table, uint tableSize, bool *isSymbolFont, int *cmapSize);
224 static quint32 getTrueTypeGlyphIndex(const uchar *cmap, uint unicode);
225
226 QAtomicInt ref;
227 QFontDef fontDef;
228 uint cache_cost; // amount of mem used in kb by the font
229 int cache_count;
230 uint fsType : 16;
231 bool symbol;
232 mutable HB_FontRec hbFont;
233 mutable HB_Face hbFace;
234#if defined(Q_WS_WIN) || defined(Q_WS_PM) || defined(Q_WS_X11) || defined(Q_WS_QWS)
235 struct KernPair {
236 uint left_right;
237 QFixed adjust;
238
239 inline bool operator<(const KernPair &other) const
240 {
241 return left_right < other.left_right;
242 }
243 };
244 QVector<KernPair> kerning_pairs;
245 void loadKerningPairs(QFixed scalingFactor);
246#endif
247
248 int glyphFormat;
249
250private:
251 /// remove old entries from the glyph cache. Helper method for the setGlyphCache ones.
252 void expireGlyphCache();
253
254 GlyphPointerHash m_glyphPointerHash;
255 GlyphIntHash m_glyphIntHash;
256 mutable QList<QFontEngineGlyphCache*> m_glyphCacheQueue;
257};
258
259inline bool operator ==(const QFontEngine::FaceId &f1, const QFontEngine::FaceId &f2)
260{
261 return (f1.index == f2.index) && (f1.encoding == f2.encoding) && (f1.filename == f2.filename);
262}
263
264inline uint qHash(const QFontEngine::FaceId &f)
265{
266 return qHash((f.index << 16) + f.encoding) + qHash(f.filename);
267}
268
269
270class QGlyph;
271
272#if defined(Q_WS_QWS)
273
274#ifndef QT_NO_QWS_QPF
275
276class QFontEngineQPF1Data;
277
278class QFontEngineQPF1 : public QFontEngine
279{
280public:
281 QFontEngineQPF1(const QFontDef&, const QString &fn);
282 ~QFontEngineQPF1();
283
284 virtual bool stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs, QTextEngine::ShaperFlags flags) const;
285 virtual void recalcAdvances(QGlyphLayout *, QTextEngine::ShaperFlags) const;
286
287 virtual void draw(QPaintEngine *p, qreal x, qreal y, const QTextItemInt &si);
288 virtual void addOutlineToPath(qreal x, qreal y, const QGlyphLayout &glyphs, QPainterPath *path, QTextItem::RenderFlags flags);
289
290 virtual glyph_metrics_t boundingBox(const QGlyphLayout &glyphs);
291 virtual glyph_metrics_t boundingBox(glyph_t glyph);
292
293 virtual QFixed ascent() const;
294 virtual QFixed descent() const;
295 virtual QFixed leading() const;
296 virtual qreal maxCharWidth() const;
297 virtual qreal minLeftBearing() const;
298 virtual qreal minRightBearing() const;
299 virtual QFixed underlinePosition() const;
300 virtual QFixed lineThickness() const;
301
302 virtual Type type() const;
303
304 virtual bool canRender(const QChar *string, int len);
305 inline const char *name() const { return 0; }
306 virtual QImage alphaMapForGlyph(glyph_t);
307
308
309 QFontEngineQPF1Data *d;
310};
311#endif // QT_NO_QWS_QPF
312
313#endif // QWS
314
315
316class QFontEngineBox : public QFontEngine
317{
318public:
319 QFontEngineBox(int size);
320 ~QFontEngineBox();
321
322 virtual bool stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs, QTextEngine::ShaperFlags flags) const;
323 virtual void recalcAdvances(QGlyphLayout *, QTextEngine::ShaperFlags) const;
324
325#if !defined(Q_WS_X11) && !defined(Q_WS_WIN) && !defined(Q_WS_PM) && !defined(Q_WS_MAC)
326 void draw(QPaintEngine *p, qreal x, qreal y, const QTextItemInt &si);
327#endif
328 virtual void addOutlineToPath(qreal x, qreal y, const QGlyphLayout &glyphs, QPainterPath *path, QTextItem::RenderFlags flags);
329
330 virtual glyph_metrics_t boundingBox(const QGlyphLayout &glyphs);
331 virtual glyph_metrics_t boundingBox(glyph_t glyph);
332
333 virtual QFixed ascent() const;
334 virtual QFixed descent() const;
335 virtual QFixed leading() const;
336 virtual qreal maxCharWidth() const;
337 virtual qreal minLeftBearing() const { return 0; }
338 virtual qreal minRightBearing() const { return 0; }
339 virtual QImage alphaMapForGlyph(glyph_t);
340
341#ifdef Q_WS_X11
342 int cmap() const;
343#endif
344 virtual const char *name() const;
345
346 virtual bool canRender(const QChar *string, int len);
347
348 virtual Type type() const;
349 inline int size() const { return _size; }
350
351private:
352 friend class QFontPrivate;
353 int _size;
354};
355
356class Q_GUI_EXPORT QFontEngineMulti : public QFontEngine
357{
358public:
359 explicit QFontEngineMulti(int engineCount);
360 ~QFontEngineMulti();
361
362 virtual bool stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs,
363 QTextEngine::ShaperFlags flags) const;
364
365 virtual glyph_metrics_t boundingBox(const QGlyphLayout &glyphs);
366 virtual glyph_metrics_t boundingBox(glyph_t glyph);
367
368 virtual void recalcAdvances(QGlyphLayout *, QTextEngine::ShaperFlags) const;
369 virtual void doKerning(QGlyphLayout *, QTextEngine::ShaperFlags) const;
370 virtual void addOutlineToPath(qreal, qreal, const QGlyphLayout &, QPainterPath *, QTextItem::RenderFlags flags);
371
372 virtual QFixed ascent() const;
373 virtual QFixed descent() const;
374 virtual QFixed leading() const;
375 virtual QFixed xHeight() const;
376 virtual QFixed averageCharWidth() const;
377 virtual QImage alphaMapForGlyph(glyph_t);
378
379 virtual QFixed lineThickness() const;
380 virtual QFixed underlinePosition() const;
381 virtual qreal maxCharWidth() const;
382 virtual qreal minLeftBearing() const;
383 virtual qreal minRightBearing() const;
384
385 virtual inline Type type() const
386 { return QFontEngine::Multi; }
387
388 virtual bool canRender(const QChar *string, int len);
389 inline virtual const char *name() const
390 { return "Multi"; }
391
392 QFontEngine *engine(int at) const;
393
394protected:
395 friend class QPSPrintEnginePrivate;
396 friend class QPSPrintEngineFontMulti;
397 virtual void loadEngine(int at) = 0;
398 QVector<QFontEngine *> engines;
399};
400
401#if defined(Q_WS_MAC)
402
403struct QCharAttributes;
404class QFontEngineMacMulti;
405# if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5
406class QCoreTextFontEngineMulti;
407class QCoreTextFontEngine : public QFontEngine
408{
409public:
410 QCoreTextFontEngine(CTFontRef font, const QFontDef &def,
411 QCoreTextFontEngineMulti *multiEngine = 0);
412 ~QCoreTextFontEngine();
413 virtual bool stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs, QTextEngine::ShaperFlags flags) const;
414 virtual void recalcAdvances(int , QGlyphLayout *, QTextEngine::ShaperFlags) const;
415
416 virtual glyph_metrics_t boundingBox(const QGlyphLayout &glyphs);
417 virtual glyph_metrics_t boundingBox(glyph_t glyph);
418
419 virtual QFixed ascent() const;
420 virtual QFixed descent() const;
421 virtual QFixed leading() const;
422 virtual QFixed xHeight() const;
423 virtual qreal maxCharWidth() const;
424 virtual QFixed averageCharWidth() const;
425
426 virtual void addGlyphsToPath(glyph_t *glyphs, QFixedPoint *positions, int numGlyphs,
427 QPainterPath *path, QTextItem::RenderFlags);
428
429 virtual const char *name() const { return "QCoreTextFontEngine"; }
430
431 virtual bool canRender(const QChar *string, int len);
432
433 virtual int synthesized() const { return synthesisFlags; }
434
435 virtual Type type() const { return QFontEngine::Mac; }
436
437 void draw(CGContextRef ctx, qreal x, qreal y, const QTextItemInt &ti, int paintDeviceHeight);
438
439 virtual FaceId faceId() const;
440 virtual bool getSfntTableData(uint /*tag*/, uchar * /*buffer*/, uint * /*length*/) const;
441 virtual void getUnscaledGlyph(glyph_t glyph, QPainterPath *path, glyph_metrics_t *metrics);
442 virtual QImage alphaMapForGlyph(glyph_t);
443 virtual qreal minRightBearing() const;
444 virtual qreal minLeftBearing() const;
445
446
447
448private:
449 CTFontRef ctfont;
450 CGFontRef cgFont;
451 QCoreTextFontEngineMulti *parentEngine;
452 int synthesisFlags;
453 friend class QCoreTextFontEngineMulti;
454};
455
456class QCoreTextFontEngineMulti : public QFontEngineMulti
457{
458public:
459 QCoreTextFontEngineMulti(const ATSFontFamilyRef &atsFamily, const ATSFontRef &atsFontRef,
460 const QFontDef &fontDef, bool kerning);
461 ~QCoreTextFontEngineMulti();
462
463 virtual bool stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs,
464 QTextEngine::ShaperFlags flags) const;
465 bool stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs,
466 QTextEngine::ShaperFlags flags,
467 unsigned short *logClusters, const HB_CharAttributes *charAttributes) const;
468
469
470 virtual void recalcAdvances(int , QGlyphLayout *, QTextEngine::ShaperFlags) const;
471 virtual void doKerning(int , QGlyphLayout *, QTextEngine::ShaperFlags) const;
472
473 virtual const char *name() const { return "CoreText"; }
474protected:
475 virtual void loadEngine(int at);
476
477private:
478 inline const QCoreTextFontEngine *engineAt(int i) const
479 { return static_cast<const QCoreTextFontEngine *>(engines.at(i)); }
480
481 uint fontIndexForFont(CTFontRef id) const;
482 CTFontRef ctfont;
483 mutable QCFType<CFMutableDictionaryRef> attributeDict;
484
485 friend class QFontDialogPrivate;
486};
487# endif //MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5
488
489#ifndef QT_MAC_USE_COCOA
490class QFontEngineMac : public QFontEngine
491{
492 friend class QFontEngineMacMulti;
493public:
494 QFontEngineMac(ATSUStyle baseStyle, ATSUFontID fontID, const QFontDef &def, QFontEngineMacMulti *multiEngine = 0);
495 virtual ~QFontEngineMac();
496
497 virtual bool stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *numGlyphs, QTextEngine::ShaperFlags flags) const;
498 virtual void recalcAdvances(QGlyphLayout *, QTextEngine::ShaperFlags) const;
499
500 virtual glyph_metrics_t boundingBox(const QGlyphLayout &glyphs);
501 virtual glyph_metrics_t boundingBox(glyph_t glyph);
502
503 virtual QFixed ascent() const;
504 virtual QFixed descent() const;
505 virtual QFixed leading() const;
506 virtual QFixed xHeight() const;
507 virtual qreal maxCharWidth() const;
508 virtual QFixed averageCharWidth() const;
509
510 virtual void addGlyphsToPath(glyph_t *glyphs, QFixedPoint *positions, int numGlyphs,
511 QPainterPath *path, QTextItem::RenderFlags);
512
513 virtual const char *name() const { return "QFontEngineMac"; }
514
515 virtual bool canRender(const QChar *string, int len);
516
517 virtual int synthesized() const { return synthesisFlags; }
518
519 virtual Type type() const { return QFontEngine::Mac; }
520
521 void draw(CGContextRef ctx, qreal x, qreal y, const QTextItemInt &ti, int paintDeviceHeight);
522
523 virtual FaceId faceId() const;
524 virtual QByteArray getSfntTable(uint tag) const;
525 virtual Properties properties() const;
526 virtual void getUnscaledGlyph(glyph_t glyph, QPainterPath *path, glyph_metrics_t *metrics);
527 virtual QImage alphaMapForGlyph(glyph_t);
528
529private:
530 ATSUFontID fontID;
531 QCFType<CGFontRef> cgFont;
532 ATSUStyle style;
533 int synthesisFlags;
534 mutable QGlyphLayout kashidaGlyph;
535 QFontEngineMacMulti *multiEngine;
536 mutable const unsigned char *cmap;
537 mutable bool symbolCMap;
538 mutable QByteArray cmapTable;
539 CGAffineTransform transform;
540 QFixed m_ascent;
541 QFixed m_descent;
542 QFixed m_leading;
543 qreal m_maxCharWidth;
544 QFixed m_xHeight;
545 QFixed m_averageCharWidth;
546};
547
548class QFontEngineMacMulti : public QFontEngineMulti
549{
550 friend class QFontEngineMac;
551public:
552 // internal
553 struct ShaperItem
554 {
555 inline ShaperItem() : string(0), from(0), length(0),
556 log_clusters(0), charAttributes(0) {}
557
558 const QChar *string;
559 int from;
560 int length;
561 QGlyphLayout glyphs;
562 unsigned short *log_clusters;
563 const HB_CharAttributes *charAttributes;
564 QTextEngine::ShaperFlags flags;
565 };
566
567 QFontEngineMacMulti(const ATSFontFamilyRef &atsFamily, const ATSFontRef &atsFontRef, const QFontDef &fontDef, bool kerning);
568 virtual ~QFontEngineMacMulti();
569
570 virtual bool stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs, QTextEngine::ShaperFlags flags) const;
571 bool stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs, QTextEngine::ShaperFlags flags,
572 unsigned short *logClusters, const HB_CharAttributes *charAttributes) const;
573
574 virtual void recalcAdvances(QGlyphLayout *, QTextEngine::ShaperFlags) const;
575 virtual void doKerning(QGlyphLayout *, QTextEngine::ShaperFlags) const;
576
577 virtual const char *name() const { return "ATSUI"; }
578
579 virtual bool canRender(const QChar *string, int len);
580
581 inline ATSUFontID macFontID() const { return fontID; }
582
583protected:
584 virtual void loadEngine(int at);
585
586private:
587 inline const QFontEngineMac *engineAt(int i) const
588 { return static_cast<const QFontEngineMac *>(engines.at(i)); }
589
590 bool stringToCMapInternal(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs, QTextEngine::ShaperFlags flags, ShaperItem *item) const;
591
592 int fontIndexForFontID(ATSUFontID id) const;
593
594 ATSUFontID fontID;
595 uint kerning : 1;
596
597 mutable ATSUTextLayout textLayout;
598 mutable ATSUStyle style;
599 CGAffineTransform transform;
600};
601#endif //!QT_MAC_USE_COCOA
602#endif
603
604class QTestFontEngine : public QFontEngineBox
605{
606public:
607 QTestFontEngine(int size) : QFontEngineBox(size) {}
608 virtual Type type() const { return TestFontEngine; }
609};
610
611QT_END_NAMESPACE
612
613#ifdef Q_WS_WIN
614# include "private/qfontengine_win_p.h"
615#endif
616
617#endif // QFONTENGINE_P_H
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