source: trunk/src/kernel/qfontengine_p.h@ 154

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1/****************************************************************************
2** $Id: qfontengine_p.h 8 2005-11-16 19:36:46Z dmik $
3**
4** ???
5**
6** Copyright (C) 1992-2003 Trolltech AS. All rights reserved.
7**
8** This file is part of the kernel module of the Qt GUI Toolkit.
9**
10** This file may be distributed and/or modified under the terms of the
11** GNU General Public License version 2 as published by the Free Software
12** Foundation and appearing in the file LICENSE.GPL included in the
13** packaging of this file.
14**
15** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
16** licenses for Qt/Embedded may use this file in accordance with the
17** Qt Embedded Commercial License Agreement provided with the Software.
18**
19** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
20** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
21**
22** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
23** information about Qt Commercial License Agreements.
24** See http://www.trolltech.com/gpl/ for GPL licensing information.
25**
26** Contact info@trolltech.com if any conditions of this licensing are
27** not clear to you.
28**
29**********************************************************************/
30
31#ifndef QFONTENGINE_P_H
32#define QFONTENGINE_P_H
33
34#ifndef QT_H
35#include "qglobal.h"
36#endif // QT_H
37
38#ifdef Q_WS_WIN
39#include "qt_windows.h"
40#endif
41
42#ifdef Q_WS_PM
43#include "qt_os2.h"
44#endif
45
46#include "qtextengine_p.h"
47
48class QPaintDevice;
49
50//@@TODO (dmik): these all are defined in the included "qtextengine_p.h",
51// what do we need it here for?
52//struct glyph_metrics_t;
53//class QChar;
54//typedef unsigned short glyph_t;
55//struct qoffset_t;
56//typedef int advance_t;
57//class QOpenType;
58struct TransformedFont;
59
60#if defined( Q_WS_X11 ) || defined( Q_WS_WIN) || defined( Q_WS_PM) || defined( Q_WS_MAC )
61class QFontEngine : public QShared
62{
63public:
64 enum Error {
65 NoError,
66 OutOfMemory
67 };
68
69 enum Type {
70 // X11 types
71 Box,
72 XLFD,
73 LatinXLFD,
74 Xft,
75
76 // MS Windows types
77 Win,
78 Uniscribe,
79
80 // OS/2 types
81 PM,
82
83 // Apple MacOS types
84 Mac,
85
86 // Trolltech QWS types
87 QWS
88 };
89
90 QFontEngine() {
91 count = 0; cache_count = 0;
92#ifdef Q_WS_X11
93 transformed_fonts = 0;
94#endif
95 }
96 virtual ~QFontEngine();
97
98 /* returns 0 as glyph index for non existant glyphs */
99 virtual Error stringToCMap( const QChar *str, int len, glyph_t *glyphs,
100 advance_t *advances, int *nglyphs, bool mirrored ) const = 0;
101
102#ifdef Q_WS_X11
103 virtual int cmap() const { return -1; }
104 virtual QOpenType *openType() const { return 0; }
105#endif
106
107 virtual void draw( QPainter *p, int x, int y, const QTextEngine *engine, const QScriptItem *si, int textFlags ) = 0;
108
109 virtual glyph_metrics_t boundingBox( const glyph_t *glyphs,
110 const advance_t *advances,
111 const qoffset_t *offsets, int numGlyphs ) = 0;
112 virtual glyph_metrics_t boundingBox( glyph_t glyph ) = 0;
113
114 virtual int ascent() const = 0;
115 virtual int descent() const = 0;
116 virtual int leading() const = 0;
117
118 virtual int lineThickness() const;
119 virtual int underlinePosition() const;
120
121 virtual int maxCharWidth() const = 0;
122 virtual int minLeftBearing() const { return 0; }
123 virtual int minRightBearing() const { return 0; }
124
125 virtual const char *name() const = 0;
126
127 virtual bool canRender( const QChar *string, int len ) = 0;
128
129 virtual void setScale( double ) {}
130 virtual double scale() const { return 1.; }
131
132 virtual Type type() const = 0;
133
134 QFontDef fontDef;
135 uint cache_cost; // amount of mem used in kb by the font
136 int cache_count;
137
138#ifdef Q_WS_WIN
139 HDC dc() const;
140 void getGlyphIndexes( const QChar *ch, int numChars, glyph_t *glyphs, bool mirrored ) const;
141 void getCMap();
142
143 QCString _name;
144 HDC hdc;
145 HFONT hfont;
146 LOGFONT logfont;
147 uint stockFont : 1;
148 uint paintDevice : 1;
149 uint useTextOutA : 1;
150 uint ttf : 1;
151 uint symbol : 1;
152 union {
153 TEXTMETRICW w;
154 TEXTMETRICA a;
155 } tm;
156 int lw;
157 unsigned char *cmap;
158 void *script_cache;
159 short lbearing;
160 short rbearing;
161#endif // Q_WS_WIN
162#ifdef Q_WS_PM
163 HPS ps() const;
164 void selectTo( HPS ps ) const;
165
166 HPS hps;
167 FATTRS fa;
168 PFONTMETRICS pfm;
169#endif
170#ifdef Q_WS_X11
171 TransformedFont *transformed_fonts;
172#endif
173};
174#elif defined( Q_WS_QWS )
175class QGfx;
176
177class QFontEngine : public QShared
178{
179public:
180 QFontEngine( const QFontDef&, const QPaintDevice * = 0 );
181 ~QFontEngine();
182 /*QMemoryManager::FontID*/ void *handle() const;
183
184 enum Type {
185 // X11 types
186 Box,
187 XLFD,
188 Xft,
189
190 // MS Windows types
191 Win,
192 Uniscribe,
193
194 // Apple MacOS types
195 Mac,
196
197 // Trolltech QWS types
198 Qws
199 };
200
201 enum TextFlags {
202 Underline = 0x01,
203 Overline = 0x02,
204 StrikeOut = 0x04
205 };
206
207 enum Error {
208 NoError,
209 OutOfMemory
210 };
211 /* returns 0 as glyph index for non existant glyphs */
212 Error stringToCMap( const QChar *str, int len, glyph_t *glyphs, advance_t *advances, int *nglyphs, bool mirrored ) const;
213
214 void draw( QPainter *p, int x, int y, const QTextEngine *engine, const QScriptItem *si, int textFlags );
215
216 glyph_metrics_t boundingBox( const glyph_t *glyphs,
217 const advance_t *advances, const qoffset_t *offsets, int numGlyphs );
218 glyph_metrics_t boundingBox( glyph_t glyph );
219
220 int ascent() const;
221 int descent() const;
222 int leading() const;
223 int maxCharWidth() const;
224 int minLeftBearing() const;
225 int minRightBearing() const;
226 int underlinePosition() const;
227 int lineThickness() const;
228
229 Type type() { return Qws; }
230
231 bool canRender( const QChar *string, int len );
232 inline const char *name() const { return 0; }
233 QFontDef fontDef;
234 /*QMemoryManager::FontID*/ void *id;
235 int cache_cost;
236 int cache_count;
237 int scale;
238};
239#endif // WIN || X11 || MAC
240
241
242
243enum IndicFeatures {
244 CcmpFeature,
245 InitFeature,
246 NuktaFeature,
247 AkhantFeature,
248 RephFeature,
249 BelowFormFeature,
250 HalfFormFeature,
251 PostFormFeature,
252 VattuFeature,
253 PreSubstFeature,
254 AboveSubstFeature,
255 BelowSubstFeature,
256 PostSubstFeature,
257 HalantFeature
258};
259
260#if defined(Q_WS_X11) || defined(Q_WS_WIN)
261class QFontEngineBox : public QFontEngine
262{
263public:
264 QFontEngineBox( int size );
265 ~QFontEngineBox();
266
267 Error stringToCMap( const QChar *str, int len, glyph_t *glyphs, advance_t *advances, int *nglyphs, bool mirrored ) const;
268
269 void draw( QPainter *p, int x, int y, const QTextEngine *engine, const QScriptItem *si, int textFlags );
270
271 virtual glyph_metrics_t boundingBox( const glyph_t *glyphs,
272 const advance_t *advances, const qoffset_t *offsets, int numGlyphs );
273 glyph_metrics_t boundingBox( glyph_t glyph );
274
275 int ascent() const;
276 int descent() const;
277 int leading() const;
278 int maxCharWidth() const;
279 int minLeftBearing() const { return 0; }
280 int minRightBearing() const { return 0; }
281
282#ifdef Q_WS_X11
283 int cmap() const;
284#endif
285 const char *name() const;
286
287 bool canRender( const QChar *string, int len );
288
289 Type type() const;
290 inline int size() const { return _size; }
291
292private:
293 friend class QFontPrivate;
294 int _size;
295};
296#endif
297
298#ifdef Q_WS_X11
299#include "qt_x11_p.h"
300
301
302struct TransformedFont
303{
304 float xx;
305 float xy;
306 float yx;
307 float yy;
308 union {
309 Font xlfd_font;
310#ifndef QT_NO_XFTFREETYPE
311 XftFont *xft_font;
312#endif
313 };
314 TransformedFont *next;
315};
316
317#ifndef QT_NO_XFTFREETYPE
318#include <ft2build.h>
319#include FT_FREETYPE_H
320#include "ftxopen.h"
321
322class QTextCodec;
323
324class QFontEngineXft : public QFontEngine
325{
326public:
327 QFontEngineXft( XftFont *font, XftPattern *pattern, int cmap );
328 ~QFontEngineXft();
329
330 QOpenType *openType() const;
331
332 Error stringToCMap( const QChar *str, int len, glyph_t *glyphs, advance_t *advances, int *nglyphs, bool mirrored ) const;
333
334 void draw( QPainter *p, int x, int y, const QTextEngine *engine, const QScriptItem *si, int textFlags );
335
336 virtual glyph_metrics_t boundingBox( const glyph_t *glyphs,
337 const advance_t *advances, const qoffset_t *offsets, int numGlyphs );
338 glyph_metrics_t boundingBox( glyph_t glyph );
339
340 int ascent() const;
341 int descent() const;
342 int leading() const;
343 int lineThickness() const;
344 int underlinePosition() const;
345 int maxCharWidth() const;
346 int minLeftBearing() const;
347 int minRightBearing() const;
348
349 int cmap() const;
350 const char *name() const;
351
352 void setScale( double scale );
353 double scale() const { return _scale; }
354
355 bool canRender( const QChar *string, int len );
356
357 Type type() const;
358 XftPattern *pattern() const { return _pattern; }
359
360 void recalcAdvances( int len, glyph_t *glyphs, advance_t *advances );
361
362private:
363 friend class QFontPrivate;
364 XftFont *_font;
365 XftPattern *_pattern;
366 FT_Face _face;
367 QOpenType *_openType;
368 int _cmap;
369 short lbearing;
370 short rbearing;
371 float _scale;
372 enum { widthCacheSize = 0x800, cmapCacheSize = 0x500 };
373 unsigned char widthCache[widthCacheSize];
374 glyph_t cmapCache[cmapCacheSize];
375};
376#endif
377
378class QFontEngineLatinXLFD;
379
380class QFontEngineXLFD : public QFontEngine
381{
382public:
383 QFontEngineXLFD( XFontStruct *fs, const char *name, int cmap );
384 ~QFontEngineXLFD();
385
386 Error stringToCMap( const QChar *str, int len, glyph_t *glyphs, advance_t *advances, int *nglyphs, bool mirrored ) const;
387
388 void draw( QPainter *p, int x, int y, const QTextEngine *engine, const QScriptItem *si, int textFlags );
389
390 virtual glyph_metrics_t boundingBox( const glyph_t *glyphs,
391 const advance_t *advances, const qoffset_t *offsets, int numGlyphs );
392 glyph_metrics_t boundingBox( glyph_t glyph );
393
394 int ascent() const;
395 int descent() const;
396 int leading() const;
397 int maxCharWidth() const;
398 int minLeftBearing() const;
399 int minRightBearing() const;
400
401 int cmap() const;
402 const char *name() const;
403
404 bool canRender( const QChar *string, int len );
405
406 void setScale( double scale );
407 double scale() const { return _scale; }
408 Type type() const;
409
410 Qt::HANDLE handle() const { return (Qt::HANDLE) _fs->fid; }
411
412private:
413 friend class QFontPrivate;
414 XFontStruct *_fs;
415 QCString _name;
416 QTextCodec *_codec;
417 float _scale; // needed for printing, to correctly scale font metrics for bitmap fonts
418 int _cmap;
419 short lbearing;
420 short rbearing;
421 enum XlfdTransformations {
422 XlfdTrUnknown,
423 XlfdTrSupported,
424 XlfdTrUnsupported
425 };
426 XlfdTransformations xlfd_transformations;
427
428 friend class QFontEngineLatinXLFD;
429};
430
431class QFontEngineLatinXLFD : public QFontEngine
432{
433public:
434 QFontEngineLatinXLFD( XFontStruct *xfs, const char *name, int cmap );
435 ~QFontEngineLatinXLFD();
436
437 Error stringToCMap( const QChar *str, int len, glyph_t *glyphs,
438 advance_t *advances, int *nglyphs, bool mirrored ) const;
439
440 void draw( QPainter *p, int x, int y, const QTextEngine *engine,
441 const QScriptItem *si, int textFlags );
442
443 virtual glyph_metrics_t boundingBox( const glyph_t *glyphs,
444 const advance_t *advances,
445 const qoffset_t *offsets, int numGlyphs );
446 glyph_metrics_t boundingBox( glyph_t glyph );
447
448 int ascent() const;
449 int descent() const;
450 int leading() const;
451 int maxCharWidth() const;
452 int minLeftBearing() const;
453 int minRightBearing() const;
454
455 int cmap() const { return -1; } // ###
456 const char *name() const;
457
458 bool canRender( const QChar *string, int len );
459
460 void setScale( double scale );
461 double scale() const { return _engines[0]->scale(); }
462 Type type() const { return LatinXLFD; }
463
464 Qt::HANDLE handle() const { return ((QFontEngineXLFD *) _engines[0])->handle(); }
465
466private:
467 void findEngine( const QChar &ch );
468
469 QFontEngine **_engines;
470 int _count;
471
472 glyph_t glyphIndices [0x200];
473 advance_t glyphAdvances[0x200];
474 glyph_t euroIndex;
475 advance_t euroAdvance;
476};
477
478class QScriptItem;
479class QTextEngine;
480
481#ifndef QT_NO_XFTFREETYPE
482class QOpenType
483{
484public:
485 QOpenType( FT_Face face );
486 ~QOpenType();
487
488 bool supportsScript( unsigned int script );
489
490 void applyGSUBFeature(unsigned int feature, bool *where = 0);
491 void applyGPOSFeatures();
492
493
494 void init(glyph_t *glyphs, GlyphAttributes *glyphAttributes, int num_glyphs,
495 unsigned short *logClusters, int len, int char_offset = 0);
496 void appendTo(QTextEngine *engine, QScriptItem *si, bool doLogClusters = TRUE);
497
498 const int *mapping(int &len);
499 inline void setLength(int len) { str->length = len; }
500 unsigned short *glyphs() { return str->string; }
501private:
502 bool loadTables( FT_ULong script);
503
504 FT_Face face;
505 TTO_GDEF gdef;
506 TTO_GSUB gsub;
507 TTO_GPOS gpos;
508 FT_UShort script_index;
509 FT_ULong current_script;
510 bool hasGDef : 1;
511 bool hasGSub : 1;
512 bool hasGPos : 1;
513 bool positioned : 1;
514 TTO_GSUB_String *str;
515 TTO_GSUB_String *tmp;
516 TTO_GPOS_Data *positions;
517 GlyphAttributes *tmpAttributes;
518 unsigned short *tmpLogClusters;
519 int length;
520 int orig_nglyphs;
521};
522#endif // QT_NO_XFTFREETYPE
523
524#elif defined( Q_WS_MAC )
525#include "qt_mac.h"
526#include <qmap.h>
527#include <qcache.h>
528
529class QFontEngineMac : public QFontEngine
530{
531#if 0
532 ATSFontMetrics *info;
533#else
534 FontInfo *info;
535#endif
536 int psize;
537 short fnum;
538 QMacFontInfo *internal_fi;
539 mutable ATSUTextLayout mTextLayout;
540 enum { widthCacheSize = 0x500 };
541 mutable unsigned char widthCache[widthCacheSize];
542 friend class QFont;
543 friend class QGLContext;
544 friend class QFontPrivate;
545 friend class QMacSetFontInfo;
546
547public:
548 QFontEngineMac();
549 ~QFontEngineMac();
550
551 Error stringToCMap( const QChar *str, int len, glyph_t *glyphs, advance_t *advances, int *nglyphs, bool mirrored ) const;
552
553 void draw( QPainter *p, int x, int y, const QTextEngine *engine, const QScriptItem *si, int textFlags );
554
555 glyph_metrics_t boundingBox( const glyph_t *glyphs,
556 const advance_t *advances, const qoffset_t *offsets, int numGlyphs );
557 glyph_metrics_t boundingBox( glyph_t glyph );
558
559 int ascent() const { return (int)info->ascent; }
560 int descent() const { return (int)info->descent; }
561 int leading() const { return (int)info->leading; }
562#if 0
563 int maxCharWidth() const { return (int)info->maxAdvanceWidth; }
564#else
565 int maxCharWidth() const { return info->widMax; }
566#endif
567
568 const char *name() const { return "ATSUI"; }
569
570 bool canRender( const QChar *string, int len );
571
572 Type type() const { return QFontEngine::Mac; }
573
574 void calculateCost();
575
576 enum { WIDTH=0x01, DRAW=0x02, EXISTS=0x04 };
577 int doTextTask(const QChar *s, int pos, int use_len, int len, uchar task, int =-1, int y=-1,
578 QPaintDevice *dev=NULL, const QRegion *rgn=NULL) const;
579};
580
581#elif defined( Q_WS_WIN )
582
583class QFontEngineWin : public QFontEngine
584{
585public:
586 QFontEngineWin( const char *name, HDC, HFONT, bool, LOGFONT );
587
588 Error stringToCMap( const QChar *str, int len, glyph_t *glyphs, advance_t *advances, int *nglyphs, bool mirrored ) const;
589
590 void draw( QPainter *p, int x, int y, const QTextEngine *engine, const QScriptItem *si, int textFlags );
591
592 glyph_metrics_t boundingBox( const glyph_t *glyphs,
593 const advance_t *advances, const qoffset_t *offsets, int numGlyphs );
594 glyph_metrics_t boundingBox( glyph_t glyph );
595
596 int ascent() const;
597 int descent() const;
598 int leading() const;
599 int maxCharWidth() const;
600 int minLeftBearing() const;
601 int minRightBearing() const;
602
603 const char *name() const;
604
605 bool canRender( const QChar *string, int len );
606
607 Type type() const;
608
609 enum { widthCacheSize = 0x800, cmapCacheSize = 0x500 };
610 unsigned char widthCache[widthCacheSize];
611};
612
613#if 0
614class QFontEngineUniscribe : public QFontEngineWin
615{
616public:
617 void draw( QPainter *p, int x, int y, const QTextEngine *engine, const QScriptItem *si, int textFlags );
618 bool canRender( const QChar *string, int len );
619
620 Type type() const;
621};
622#endif
623
624#elif defined( Q_WS_PM )
625
626class QFontEnginePM : public QFontEngine
627{
628public:
629 QFontEnginePM( HPS ps, PFATTRS pfa, int pixelSize, int pointSize );
630 virtual ~QFontEnginePM() { delete[] widthCache; }
631
632 Error stringToCMap( const QChar *str, int len, glyph_t *glyphs, advance_t *advances, int *nglyphs, bool mirrored ) const;
633
634 void draw( QPainter *p, int x, int y, const QTextEngine *engine, const QScriptItem *si, int textFlags );
635
636 glyph_metrics_t boundingBox( const glyph_t *glyphs,
637 const advance_t *advances, const qoffset_t *offsets, int numGlyphs );
638 glyph_metrics_t boundingBox( glyph_t glyph );
639
640 int ascent() const;
641 int descent() const;
642 int leading() const;
643 int maxCharWidth() const;
644 int minLeftBearing() const;
645 int minRightBearing() const;
646
647//@@TODO (dmik): need other implementation?
648 const char *name() const { return 0; }
649
650 bool canRender( const QChar *string, int len );
651
652 Type type() const;
653
654//@@TODO (dmik): the current implementation of font-related code does not
655// support true unicode (chars and strings are converted using
656// QString::local8bit), so 256 is enough. It will be changed later (when,
657// for example, ft2lib will be used). See also stringToCMap() implementation.
658 enum { widthCacheSize = 256 };
659 unsigned char *widthCache;
660};
661
662#endif
663
664#endif
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