summaryrefslogtreecommitdiffstats
path: root/src/kernel/qfontengine_p.h
blob: e7149031a8b6b3a5eb06d8d0ccfac276a13437f4 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
/****************************************************************************
**
** ???
**
** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
**
** This file is part of the kernel module of the Qt GUI Toolkit.
**
** This file may be used under the terms of the GNU General
** Public License versions 2.0 or 3.0 as published by the Free
** Software Foundation and appearing in the files LICENSE.GPL2
** and LICENSE.GPL3 included in the packaging of this file.
** Alternatively you may (at your option) use any later version
** of the GNU General Public License if such license has been
** publicly approved by Trolltech ASA (or its successors, if any)
** and the KDE Free Qt Foundation.
**
** Please review the following information to ensure GNU General
** Public Licensing requirements will be met:
** http://trolltech.com/products/qt/licenses/licensing/opensource/.
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
** or contact the sales department at sales@trolltech.com.
**
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with
** the Software.
**
** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
** herein.
**
**********************************************************************/

#ifndef QFONTENGINE_P_H
#define QFONTENGINE_P_H

#ifndef QT_H
#include "qglobal.h"
#endif // QT_H

#ifdef Q_WS_WIN
#include "qt_windows.h"
#include "qptrdict.h"
#endif

#include "qtextengine_p.h"

class QPaintDevice;

struct glyph_metrics_t;
class QChar;
typedef unsigned short glyph_t;
struct qoffset_t;
typedef int advance_t;
class QOpenType;
struct TransformedFont;

#if defined( Q_WS_X11 ) || defined( Q_WS_WIN) || defined( Q_WS_MAC )
class QFontEngine : public QShared
{
public:
    enum Error {
	NoError,
	OutOfMemory
    };

    enum Type {
	// X11 types
	Box,
	XLFD,
	LatinXLFD,
	Xft,

	// MS Windows types
	Win,
	Uniscribe,

	// Apple MacOS types
	Mac,

	// Trolltech QWS types
	QWS
    };

    QFontEngine() {
	count = 0; cache_count = 0;
#ifdef Q_WS_X11
	transformed_fonts = 0;
#endif
    }
    virtual ~QFontEngine();

    /* returns 0 as glyph index for non existant glyphs */
    virtual Error stringToCMap( const QChar *str, int len, glyph_t *glyphs,
				advance_t *advances, int *nglyphs, bool mirrored ) const = 0;

#ifdef Q_WS_X11
    virtual int cmap() const { return -1; }
    virtual QOpenType *openType() const { return 0; }
#endif

    virtual void draw( QPainter *p, int x, int y, const QTextEngine *engine, const QScriptItem *si, int textFlags ) = 0;

    virtual glyph_metrics_t boundingBox( const glyph_t *glyphs,
					 const advance_t *advances,
					 const qoffset_t *offsets, int numGlyphs ) = 0;
    virtual glyph_metrics_t boundingBox( glyph_t glyph ) = 0;

    virtual int ascent() const = 0;
    virtual int descent() const = 0;
    virtual int leading() const = 0;

    virtual int lineThickness() const;
    virtual int underlinePosition() const;

    virtual int maxCharWidth() const = 0;
    virtual int minLeftBearing() const { return 0; }
    virtual int minRightBearing() const { return 0; }

    virtual const char *name() const = 0;

    virtual bool canRender( const QChar *string,  int len ) = 0;

    virtual void setScale( double ) {}
    virtual double scale() const { return 1.; }

    virtual Type type() const = 0;

    QFontDef fontDef;
    uint cache_cost; // amount of mem used in kb by the font
    int cache_count;

#ifdef Q_WS_WIN
    HDC dc() const;
    void getGlyphIndexes( const QChar *ch, int numChars, glyph_t *glyphs, bool mirrored ) const;
    void getCMap();

    QCString _name;
    HDC		hdc;
    HFONT	hfont;
    LOGFONT     logfont;
    uint	stockFont   : 1;
    uint	paintDevice : 1;
    uint        useTextOutA : 1;
    uint        ttf         : 1;
    uint        symbol      : 1;
    union {
	TEXTMETRICW	w;
	TEXTMETRICA	a;
    } tm;
    int		lw;
    unsigned char *cmap;
    void *script_cache;
    static QPtrDict<QFontEngine> cacheDict;
    short lbearing;
    short rbearing;
#endif // Q_WS_WIN
#ifdef Q_WS_X11
    TransformedFont *transformed_fonts;
#endif
};
#elif defined( Q_WS_QWS )
class QGfx;

class QFontEngine : public QShared
{
public:
    QFontEngine( const QFontDef&, const QPaintDevice * = 0 );
   ~QFontEngine();
    /*QMemoryManager::FontID*/ void *handle() const;

    enum Type {
	// X11 types
	Box,
	XLFD,
	Xft,

	// MS Windows types
	Win,
	Uniscribe,

	// Apple MacOS types
	Mac,

	// Trolltech QWS types
	Qws
    };

    enum TextFlags {
	Underline = 0x01,
	Overline  = 0x02,
	StrikeOut = 0x04
    };

    enum Error {
	NoError,
	OutOfMemory
    };
    /* returns 0 as glyph index for non existant glyphs */
    Error stringToCMap( const QChar *str, int len, glyph_t *glyphs, advance_t *advances, int *nglyphs, bool mirrored ) const;

    void draw( QPainter *p, int x, int y, const QTextEngine *engine, const QScriptItem *si, int textFlags );

    glyph_metrics_t boundingBox( const glyph_t *glyphs,
			       const advance_t *advances, const qoffset_t *offsets, int numGlyphs );
    glyph_metrics_t boundingBox( glyph_t glyph );

    int ascent() const;
    int descent() const;
    int leading() const;
    int maxCharWidth() const;
    int minLeftBearing() const;
    int minRightBearing() const;
    int underlinePosition() const;
    int lineThickness() const;

    Type type() { return Qws; }

    bool canRender( const QChar *string,  int len );
    inline const char *name() const { return 0; }
    QFontDef fontDef;
    /*QMemoryManager::FontID*/ void *id;
    int cache_cost;
    int cache_count;
    int scale;
};
#endif // WIN || X11 || MAC



enum IndicFeatures {
    CcmpFeature,
    InitFeature,
    NuktaFeature,
    AkhantFeature,
    RephFeature,
    BelowFormFeature,
    HalfFormFeature,
    PostFormFeature,
    VattuFeature,
    PreSubstFeature,
    AboveSubstFeature,
    BelowSubstFeature,
    PostSubstFeature,
    HalantFeature
};

#if defined(Q_WS_X11) || defined(Q_WS_WIN)
class QFontEngineBox : public QFontEngine
{
public:
    QFontEngineBox( int size );
    ~QFontEngineBox();

    Error stringToCMap( const QChar *str,  int len, glyph_t *glyphs, advance_t *advances, int *nglyphs, bool mirrored ) const;

    void draw( QPainter *p, int x, int y, const QTextEngine *engine, const QScriptItem *si, int textFlags );

    virtual glyph_metrics_t boundingBox( const glyph_t *glyphs,
				    const advance_t *advances, const qoffset_t *offsets, int numGlyphs );
    glyph_metrics_t boundingBox( glyph_t glyph );

    int ascent() const;
    int descent() const;
    int leading() const;
    int maxCharWidth() const;
    int minLeftBearing() const { return 0; }
    int minRightBearing() const { return 0; }

#ifdef Q_WS_X11
    int cmap() const;
#endif
    const char *name() const;

    bool canRender( const QChar *string,  int len );

    Type type() const;
    inline int size() const { return _size; }

private:
    friend class QFontPrivate;
    int _size;
};
#endif

#ifdef Q_WS_X11
#include "qt_x11_p.h"


struct TransformedFont
{
    float xx;
    float xy;
    float yx;
    float yy;
    union {
	Font xlfd_font;
#ifndef QT_NO_XFTFREETYPE
	XftFont *xft_font;
#endif
    };
    TransformedFont *next;
};

#ifndef QT_NO_XFTFREETYPE
#include <ft2build.h>
#include FT_FREETYPE_H
#include "ftxopen.h"

class QTextCodec;

class QFontEngineXft : public QFontEngine
{
public:
    QFontEngineXft( XftFont *font, XftPattern *pattern, int cmap );
    ~QFontEngineXft();

    QOpenType *openType() const;

    Error stringToCMap( const QChar *str,  int len, glyph_t *glyphs, advance_t *advances, int *nglyphs, bool mirrored ) const;

    void draw( QPainter *p, int x, int y, const QTextEngine *engine, const QScriptItem *si, int textFlags );

    virtual glyph_metrics_t boundingBox( const glyph_t *glyphs,
				    const advance_t *advances, const qoffset_t *offsets, int numGlyphs );
    glyph_metrics_t boundingBox( glyph_t glyph );

    int ascent() const;
    int descent() const;
    int leading() const;
    int lineThickness() const;
    int underlinePosition() const;
    int maxCharWidth() const;
    int minLeftBearing() const;
    int minRightBearing() const;

    int cmap() const;
    const char *name() const;

    void setScale( double scale );
    double scale() const { return _scale; }

    bool canRender( const QChar *string,  int len );

    Type type() const;
    XftPattern *pattern() const { return _pattern; }
    FT_Face face() const { return _face; }
    XftFont *font() const { return _font; }

    void recalcAdvances( int len, glyph_t *glyphs, advance_t *advances );

private:
    friend class QFontPrivate;
    friend class QOpenType;
    XftFont *_font;
    XftPattern *_pattern;
    FT_Face _face;
    QOpenType *_openType;
    int _cmap;
    short lbearing;
    short rbearing;
    float _scale;
    enum { widthCacheSize = 0x800, cmapCacheSize = 0x500 };
    unsigned char widthCache[widthCacheSize];
    glyph_t cmapCache[cmapCacheSize];
};
#endif

class QFontEngineLatinXLFD;

class QFontEngineXLFD : public QFontEngine
{
public:
    QFontEngineXLFD( XFontStruct *fs, const char *name, int cmap );
    ~QFontEngineXLFD();

    Error stringToCMap( const QChar *str,  int len, glyph_t *glyphs, advance_t *advances, int *nglyphs, bool mirrored ) const;

    void draw( QPainter *p, int x, int y, const QTextEngine *engine, const QScriptItem *si, int textFlags );

    virtual glyph_metrics_t boundingBox( const glyph_t *glyphs,
				    const advance_t *advances, const qoffset_t *offsets, int numGlyphs );
    glyph_metrics_t boundingBox( glyph_t glyph );

    int ascent() const;
    int descent() const;
    int leading() const;
    int maxCharWidth() const;
    int minLeftBearing() const;
    int minRightBearing() const;

    int cmap() const;
    const char *name() const;

    bool canRender( const QChar *string,  int len );

    void setScale( double scale );
    double scale() const { return _scale; }
    Type type() const;

    Qt::HANDLE handle() const { return (Qt::HANDLE) _fs->fid; }

private:
    friend class QFontPrivate;
    XFontStruct *_fs;
    QCString _name;
    QTextCodec *_codec;
    float _scale; // needed for printing, to correctly scale font metrics for bitmap fonts
    int _cmap;
    short lbearing;
    short rbearing;
    enum XlfdTransformations {
	XlfdTrUnknown,
	XlfdTrSupported,
	XlfdTrUnsupported
    };
    XlfdTransformations xlfd_transformations;

    friend class QFontEngineLatinXLFD;
};

class QFontEngineLatinXLFD : public QFontEngine
{
public:
    QFontEngineLatinXLFD( XFontStruct *xfs, const char *name, int cmap );
    ~QFontEngineLatinXLFD();

    Error stringToCMap( const QChar *str,  int len, glyph_t *glyphs,
			advance_t *advances, int *nglyphs, bool mirrored ) const;

    void draw( QPainter *p, int x, int y, const QTextEngine *engine,
	       const QScriptItem *si, int textFlags );

    virtual glyph_metrics_t boundingBox( const glyph_t *glyphs,
					 const advance_t *advances,
					 const qoffset_t *offsets, int numGlyphs );
    glyph_metrics_t boundingBox( glyph_t glyph );

    int ascent() const;
    int descent() const;
    int leading() const;
    int maxCharWidth() const;
    int minLeftBearing() const;
    int minRightBearing() const;

    int cmap() const { return -1; } // ###
    const char *name() const;

    bool canRender( const QChar *string,  int len );

    void setScale( double scale );
    double scale() const { return _engines[0]->scale(); }
    Type type() const { return LatinXLFD; }

    Qt::HANDLE handle() const { return ((QFontEngineXLFD *) _engines[0])->handle(); }

private:
    void findEngine( const QChar &ch );

    QFontEngine **_engines;
    int _count;

    glyph_t   glyphIndices [0x200];
    advance_t glyphAdvances[0x200];
    glyph_t euroIndex;
    advance_t euroAdvance;
};

class QScriptItem;
class QTextEngine;

#ifndef QT_NO_XFTFREETYPE

#include "qscriptengine_p.h"
#include "qtextengine_p.h"
#include <ft2build.h>
#include FT_FREETYPE_H
#include "ftxopen.h"

enum { PositioningProperties = 0x80000000 };

class QOpenType
{
public:
    QOpenType(QFontEngineXft *fe);
    ~QOpenType();

    struct Features {
        uint tag;
        uint property;
    };

    bool supportsScript(unsigned int script) {
        Q_ASSERT(script < QFont::NScripts);
        return supported_scripts[script];
    }
    void selectScript(unsigned int script, const Features *features = 0);

    bool shape(QShaperItem *item, const unsigned int *properties = 0);
    bool positionAndAdd(QShaperItem *item, bool doLogClusters = TRUE);

    OTL_GlyphItem glyphs() const { return otl_buffer->in_string; }
    int len() const { return otl_buffer->in_length; }
    void setProperty(int index, uint property) { otl_buffer->in_string[index].properties = property; }


private:
    bool checkScript(unsigned int script);
    QFontEngine *fontEngine;
    FT_Face face;
    TTO_GDEF gdef;
    TTO_GSUB gsub;
    TTO_GPOS gpos;
    bool supported_scripts[QFont::NScripts];
    FT_ULong current_script;
    bool positioned : 1;
    OTL_Buffer otl_buffer;
    GlyphAttributes *tmpAttributes;
    unsigned int *tmpLogClusters;
    int length;
    int orig_nglyphs;
    int loadFlags;
};

#endif // QT_NO_XFTFREETYPE

#elif defined( Q_WS_MAC )
#include "qt_mac.h"
#include <qmap.h>
#include <qcache.h>

class QFontEngineMac : public QFontEngine
{
#if 0
    ATSFontMetrics *info;
#else
    FontInfo *info;
#endif
    int psize;
    FMFontFamily fmfam;
    QMacFontInfo *internal_fi;
    mutable ATSUTextLayout mTextLayout;
    enum { widthCacheSize = 0x500 };
    mutable unsigned char widthCache[widthCacheSize];
    friend class QFont;
    friend class QGLContext;
    friend class QFontPrivate;
    friend class QMacSetFontInfo;

public:
    QFontEngineMac();
    ~QFontEngineMac();

    Error stringToCMap( const QChar *str, int len, glyph_t *glyphs, advance_t *advances, int *nglyphs, bool mirrored ) const;

    void draw( QPainter *p, int x, int y, const QTextEngine *engine, const QScriptItem *si, int textFlags );

    glyph_metrics_t boundingBox( const glyph_t *glyphs,
			       const advance_t *advances, const qoffset_t *offsets, int numGlyphs );
    glyph_metrics_t boundingBox( glyph_t glyph );

    int ascent() const { return (int)info->ascent; }
    int descent() const { return (int)info->descent; }
    int leading() const { return (int)info->leading; }
#if 0
    int maxCharWidth() const { return (int)info->maxAdvanceWidth; }
#else
    int maxCharWidth() const { return info->widMax; }
#endif

    const char *name() const { return "ATSUI"; }

    bool canRender( const QChar *string,  int len );

    Type type() const { return QFontEngine::Mac; }

    void calculateCost();

    enum { WIDTH=0x01, DRAW=0x02, EXISTS=0x04 };
    int doTextTask(const QChar *s, int pos, int use_len, int len, uchar task, int =-1, int y=-1,
		   QPaintDevice *dev=NULL, const QRegion *rgn=NULL) const;
};

#elif defined( Q_WS_WIN )

class QFontEngineWin : public QFontEngine
{
public:
    QFontEngineWin( const char *name, HDC, HFONT, bool, LOGFONT );

    Error stringToCMap( const QChar *str, int len, glyph_t *glyphs, advance_t *advances, int *nglyphs, bool mirrored ) const;

    void draw( QPainter *p, int x, int y, const QTextEngine *engine, const QScriptItem *si, int textFlags );

    glyph_metrics_t boundingBox( const glyph_t *glyphs,
			       const advance_t *advances, const qoffset_t *offsets, int numGlyphs );
    glyph_metrics_t boundingBox( glyph_t glyph );

    int ascent() const;
    int descent() const;
    int leading() const;
    int maxCharWidth() const;
    int minLeftBearing() const;
    int minRightBearing() const;

    const char *name() const;

    bool canRender( const QChar *string,  int len );

    Type type() const;

    enum { widthCacheSize = 0x800, cmapCacheSize = 0x500 };
    unsigned char widthCache[widthCacheSize];
};

#if 0
class QFontEngineUniscribe : public QFontEngineWin
{
public:
    void draw( QPainter *p, int x, int y, const QTextEngine *engine, const QScriptItem *si, int textFlags );
    bool canRender( const QChar *string,  int len );

    Type type() const;
};
#endif

#endif // Q_WS_WIN

#endif