source: trunk/src/kernel/qtextengine_pm.cpp@ 8

Last change on this file since 8 was 8, checked in by dmik, 20 years ago

Transferred Qt for OS/2 version 3.3.1-rc5 sources from the CVS
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1/****************************************************************************
2** $Id: qtextengine_pm.cpp 8 2005-11-16 19:36:46Z dmik $
3**
4** ???
5**
6** Copyright (C) 2003 Trolltech AS. All rights reserved.
7** Copyright (C) 2004 Norman ASA. Initial OS/2 Port.
8** Copyright (C) 2005 netlabs.org. Further OS/2 Development.
9**
10** This file is part of the kernel module of the Qt GUI Toolkit.
11**
12** This file may be distributed under the terms of the Q Public License
13** as defined by Trolltech AS of Norway and appearing in the file
14** LICENSE.QPL included in the packaging of this file.
15**
16** This file may be distributed and/or modified under the terms of the
17** GNU General Public License version 2 as published by the Free Software
18** Foundation and appearing in the file LICENSE.GPL included in the
19** packaging of this file.
20**
21** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
22** licenses may use this file in accordance with the Qt Commercial License
23** Agreement provided with the Software.
24**
25** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
26** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
27**
28** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
29** information about Qt Commercial License Agreements.
30** See http://www.trolltech.com/qpl/ for QPL licensing information.
31** See http://www.trolltech.com/gpl/ for GPL licensing information.
32**
33** Contact info@trolltech.com if any conditions of this licensing are
34** not clear to you.
35**
36**********************************************************************/
37
38#ifdef QT_THREAD_SUPPORT
39# include <private/qmutexpool_p.h>
40#endif // QT_THREAD_SUPPORT
41#include "qlibrary.h"
42
43
44//@@TODO (dmik): remove?
45//// these defines are from usp10.h
46//typedef void *SCRIPT_CACHE;
47//typedef struct tag_SCRIPT_CONTROL {
48// DWORD uDefaultLanguage :16;
49// DWORD fContextDigits :1;
50// DWORD fInvertPreBoundDir :1;
51// DWORD fInvertPostBoundDir :1;
52// DWORD fLinkStringBefore :1;
53// DWORD fLinkStringAfter :1;
54// DWORD fNeutralOverride :1;
55// DWORD fNumericOverride :1;
56// DWORD fLegacyBidiClass :1;
57// DWORD fReserved :8;
58//} SCRIPT_CONTROL;
59//
60//typedef struct tag_SCRIPT_STATE {
61// WORD uBidiLevel :5;
62// WORD fOverrideDirection :1;
63// WORD fInhibitSymSwap :1;
64// WORD fCharShape :1;
65// WORD fDigitSubstitute :1;
66// WORD fInhibitLigate :1;
67// WORD fDisplayZWG :1;
68// WORD fArabicNumContext :1;
69// WORD fGcpClusters :1;
70// WORD fReserved :1;
71// WORD fEngineReserved :2;
72//} SCRIPT_STATE;
73//
74//typedef struct tag_SCRIPT_ITEM {
75// int iCharPos;
76// QScriptAnalysis a;
77//} SCRIPT_ITEM;
78//
79//typedef GlyphAttributes SCRIPT_VISATTR;
80//typedef qoffset_t GOFFSET;
81//
82//#define USP_E_SCRIPT_NOT_IN_FONT \
83// MAKE_HRESULT(SEVERITY_ERROR,FACILITY_ITF,0x200) // Script doesn't exist in font
84//
85//typedef struct {
86// DWORD langid :16;
87// DWORD fNumeric :1;
88// DWORD fComplex :1;
89// DWORD fNeedsWordBreaking :1;
90// DWORD fNeedsCaretInfo :1;
91// DWORD bCharSet :8;
92// DWORD fControl :1;
93// DWORD fPrivateUseArea :1;
94// DWORD fNeedsCharacterJustify :1;
95// DWORD fInvalidGlyph :1;
96// DWORD fInvalidLogAttr :1;
97// DWORD fCDM :1;
98// DWORD fAmbiguousCharSet :1;
99// DWORD fClusterSizeVaries :1;
100// DWORD fRejectInvalid :1;
101//} SCRIPT_PROPERTIES;
102//
103//#if defined(Q_OS_TEMP) && UNDER_CE < 400
104//typedef struct _ABC {
105// int abcA;
106// UINT abcB;
107// int abcC;
108//} ABC;
109//#endif
110//
111//typedef HRESULT (WINAPI *fScriptFreeCache)( SCRIPT_CACHE *);
112//typedef HRESULT (WINAPI *fScriptItemize)( const WCHAR *, int, int, const SCRIPT_CONTROL *,
113// const SCRIPT_STATE *, SCRIPT_ITEM *, int *);
114//typedef HRESULT (WINAPI *fScriptShape)( HDC hdc, SCRIPT_CACHE *, const WCHAR *, int, int,
115// QScriptAnalysis *, WORD *, WORD *, SCRIPT_VISATTR *, int *);
116//typedef HRESULT (WINAPI *fScriptPlace)( HDC, SCRIPT_CACHE *, const WORD *, int, const SCRIPT_VISATTR *, QScriptAnalysis *, int *,
117// GOFFSET *, ABC * );
118//typedef HRESULT (WINAPI *fScriptTextOut)( const HDC, SCRIPT_CACHE *, int, int, UINT, const RECT *, const QScriptAnalysis *,
119// const WCHAR *, int, const WORD *, int, const int *, const int *, const GOFFSET *);
120//typedef HRESULT (WINAPI *fScriptBreak)( const WCHAR *, int, const QScriptAnalysis *, QCharAttributes * );
121////typedef HRESULT (WINAPI *fScriptGetFontProperties)( HDC, SCRIPT_CACHE *, SCRIPT_FONTPROPERTIES * );
122//typedef HRESULT (WINAPI *fScriptGetProperties)( const SCRIPT_PROPERTIES ***, int *);
123//
124//fScriptFreeCache ScriptFreeCache = 0;
125//static fScriptItemize ScriptItemize = 0;
126//static fScriptShape ScriptShape = 0;
127//static fScriptPlace ScriptPlace = 0;
128//fScriptTextOut ScriptTextOut = 0;
129//static fScriptBreak ScriptBreak = 0;
130////static fScriptGetFontProperties ScriptGetFontProperties = 0;
131//static fScriptGetProperties ScriptGetProperties = 0;
132//
133//static bool resolvedUsp10 = FALSE;
134//bool hasUsp10 = FALSE;
135//
136//const SCRIPT_PROPERTIES **script_properties = 0;
137//int num_scripts = 0;
138//int usp_latin_script = 0;
139//
140//
141//const QFont::Script japanese_tryScripts[] = {
142// QFont::Latin,
143// QFont::Han_Japanese,
144// QFont::Hangul,
145// QFont::Han_SimplifiedChinese,
146// QFont::Han_TraditionalChinese
147//};
148//
149//const QFont::Script korean_tryScripts[] = {
150// QFont::Latin,
151// QFont::Hangul,
152// QFont::Han_Japanese,
153// QFont::Han_SimplifiedChinese,
154// QFont::Han_TraditionalChinese
155//};
156//
157//const QFont::Script simplifiedChinese_tryScripts[] = {
158// QFont::Latin,
159// QFont::Han_SimplifiedChinese,
160// QFont::Han_TraditionalChinese,
161// QFont::Han_Japanese,
162// QFont::Hangul
163//};
164//
165//const QFont::Script traditionalChinese_tryScripts[] = {
166// QFont::Latin,
167// QFont::Han_TraditionalChinese,
168// QFont::Han_SimplifiedChinese,
169// QFont::Han_Japanese,
170// QFont::Hangul
171//};
172//
173//const QFont::Script *tryScripts = japanese_tryScripts;
174//
175//static void uspAppendItems(QTextEngine *engine, int &start, int &stop, BidiControl &control, QChar::Direction dir);
176//
177//static void resolveUsp10()
178//{
179//#ifndef QT_NO_COMPONENT
180// if ( !resolvedUsp10 ) {
181// // need to resolve the security info functions
182//
183//#ifdef QT_THREAD_SUPPORT
184// // protect initialization
185// QMutexLocker locker( qt_global_mutexpool ?
186// qt_global_mutexpool->get( (void*)&resolveUsp10 ) : 0 );
187// // check triedResolve again, since another thread may have already
188// // done the initialization
189// if ( resolvedUsp10 ) {
190// // another thread did initialize the security function pointers,
191// // so we shouldn't do it again.
192// return;
193// }
194//#endif
195//
196// resolvedUsp10 = TRUE;
197// QLibrary lib("usp10");
198// lib.setAutoUnload( FALSE );
199//
200// ScriptFreeCache = (fScriptFreeCache) lib.resolve( "ScriptFreeCache" );
201// ScriptItemize = (fScriptItemize) lib.resolve( "ScriptItemize" );
202// ScriptShape = (fScriptShape) lib.resolve( "ScriptShape" );
203// ScriptPlace = (fScriptPlace) lib.resolve( "ScriptPlace" );
204// ScriptTextOut = (fScriptTextOut) lib.resolve( "ScriptTextOut" );
205// ScriptBreak = (fScriptBreak) lib.resolve( "ScriptBreak" );
206// ScriptGetProperties = (fScriptGetProperties) lib.resolve( "ScriptGetProperties" );
207//
208// if ( !ScriptFreeCache )
209// return;
210//
211// hasUsp10 = TRUE;
212// ScriptGetProperties( &script_properties, &num_scripts );
213//
214// // get the usp script for western
215// for( int i = 0; i < num_scripts; i++ ) {
216// if (script_properties[i]->langid == LANG_ENGLISH &&
217// !script_properties[i]->fAmbiguousCharSet ) {
218// usp_latin_script = i;
219// break;
220// }
221// }
222//
223// // initialize tryScripts according to locale
224// LANGID lid = GetUserDefaultLangID();
225// switch( lid&0xff ) {
226// case LANG_CHINESE: // Chinese (Taiwan)
227// if ( lid == 0x0804 ) // Taiwan
228// tryScripts = traditionalChinese_tryScripts;
229// else
230// tryScripts = simplifiedChinese_tryScripts;
231// break;
232// case LANG_JAPANESE:
233// // japanese is already the default
234// break;
235// case LANG_KOREAN:
236// tryScripts = korean_tryScripts;
237// break;
238// default:
239// break;
240// }
241//
242// appendItems = uspAppendItems;
243// }
244//#endif
245//}
246//
247//static unsigned char script_for_win_language[ 0x80 ] = {
248// //0x00 LANG_NEUTRAL Neutral
249// QFont::Latin,
250// //0x01 LANG_ARABIC Arabic
251// QFont::Arabic,
252// //0x02 LANG_BULGARIAN Bulgarian
253// QFont::NScripts,
254// //0x03 LANG_CATALAN Catalan
255// QFont::NScripts,
256// //0x04 LANG_CHINESE Chinese
257// QFont::Han,
258// //0x05 LANG_CZECH Czech
259// QFont::NScripts,
260// //0x06 LANG_DANISH Danish
261// QFont::NScripts,
262// //0x07 LANG_GERMAN German
263// QFont::NScripts,
264// //0x08 LANG_GREEK Greek
265// QFont::Greek,
266// //0x09 LANG_ENGLISH English
267// QFont::Latin,
268// //0x0a LANG_SPANISH Spanish
269// QFont::NScripts,
270// //0x0b LANG_FINNISH Finnish
271// QFont::NScripts,
272// //0x0c LANG_FRENCH French
273// QFont::NScripts,
274// //0x0d LANG_HEBREW Hebrew
275// QFont::Hebrew,
276// //0x0e LANG_HUNGARIAN Hungarian
277// QFont::NScripts,
278// //0x0f LANG_ICELANDIC Icelandic
279// QFont::NScripts,
280//
281// //0x10 LANG_ITALIAN Italian
282// QFont::NScripts,
283// //0x11 LANG_JAPANESE Japanese
284// QFont::Hiragana,
285// //0x12 LANG_KOREAN Korean
286// QFont::Hangul,
287// //0x13 LANG_DUTCH Dutch
288// QFont::NScripts,
289// //0x14 LANG_NORWEGIAN Norwegian
290// QFont::NScripts,
291// //0x15 LANG_POLISH Polish
292// QFont::NScripts,
293// //0x16 LANG_PORTUGUESE Portuguese
294// QFont::NScripts,
295// QFont::NScripts,
296// //0x18 LANG_ROMANIAN Romanian
297// QFont::NScripts,
298// //0x19 LANG_RUSSIAN Russian
299// QFont::Cyrillic,
300// //0x1a LANG_CROATIAN Croatian
301// //0x1a LANG_SERBIAN Serbian
302// QFont::NScripts,
303// //0x1b LANG_SLOVAK Slovak
304// QFont::NScripts,
305// //0x1c LANG_ALBANIAN Albanian
306// QFont::NScripts,
307// //0x1d LANG_SWEDISH Swedish
308// QFont::NScripts,
309// //0x1e LANG_THAI Thai
310// QFont::Thai,
311// //0x1f LANG_TURKISH Turkish
312// QFont::NScripts,
313//
314// //0x20 LANG_URDU Urdu
315// QFont::NScripts,
316// //0x21 LANG_INDONESIAN Indonesian
317// QFont::NScripts,
318// //0x22 LANG_UKRAINIAN Ukrainian
319// QFont::NScripts,
320// //0x23 LANG_BELARUSIAN Belarusian
321// QFont::NScripts,
322// //0x24 LANG_SLOVENIAN Slovenian
323// QFont::NScripts,
324// //0x25 LANG_ESTONIAN Estonian
325// QFont::NScripts,
326// //0x26 LANG_LATVIAN Latvian
327// QFont::NScripts,
328// //0x27 LANG_LITHUANIAN Lithuanian
329// QFont::NScripts,
330// QFont::NScripts,
331// //0x29 LANG_FARSI Farsi
332// QFont::NScripts,
333// //0x2a LANG_VIETNAMESE Vietnamese
334// QFont::Latin, // ##### maybe use QFont::CombiningMarks instead?
335// //0x2b LANG_ARMENIAN Armenian
336// QFont::Armenian,
337// //0x2c LANG_AZERI Azeri
338// QFont::NScripts,
339// //0x2d LANG_BASQUE Basque
340// QFont::NScripts,
341// QFont::NScripts,
342// //0x2f LANG_MACEDONIAN FYRO Macedonian
343// QFont::NScripts,
344//
345// QFont::NScripts,
346// QFont::NScripts,
347// QFont::NScripts,
348// QFont::NScripts,
349// QFont::NScripts,
350// QFont::NScripts,
351// //0x36 LANG_AFRIKAANS Afrikaans
352// QFont::NScripts,
353// //0x37 LANG_GEORGIAN Georgian
354// QFont::NScripts,
355// //0x38 LANG_FAEROESE Faeroese
356// QFont::NScripts,
357// //0x39 LANG_HINDI Hindi
358// QFont::Devanagari,
359// QFont::NScripts,
360// QFont::NScripts,
361// QFont::NScripts,
362// QFont::NScripts,
363// //0x3e LANG_MALAY Malay
364// QFont::NScripts,
365// //0x3f LANG_KAZAK Kazak
366// QFont::NScripts,
367//
368// //0x40 LANG_KYRGYZ Kyrgyz
369// QFont::NScripts,
370// //0x41 LANG_SWAHILI Swahili
371// QFont::NScripts,
372// QFont::NScripts,
373// //0x43 LANG_UZBEK Uzbek
374// QFont::NScripts,
375// //0x44 LANG_TATAR Tatar
376// QFont::NScripts,
377// //0x45 LANG_BENGALI Not supported.
378// QFont::Bengali,
379// //0x46 LANG_PUNJABI Punjabi
380// QFont::Gurmukhi,
381// //0x47 LANG_GUJARATI Gujarati
382// QFont::Gujarati,
383// //0x48 LANG_ORIYA Not supported.
384// QFont::Oriya,
385// //0x49 LANG_TAMIL Tamil
386// QFont::Tamil,
387// //0x4a LANG_TELUGU Telugu
388// QFont::Telugu,
389// //0x4b LANG_KANNADA Kannada
390// QFont::Kannada,
391// //0x4c LANG_MALAYALAM Not supported.
392// QFont::Malayalam,
393// //0x4d LANG_ASSAMESE Not supported.
394// QFont::NScripts,
395// //0x4e LANG_MARATHI Marathi
396// QFont::NScripts,
397// //0x4f LANG_SANSKRIT Sanskrit
398// QFont::Devanagari,
399//
400// //0x50 LANG_MONGOLIAN Mongolian
401// QFont::Mongolian,
402// QFont::NScripts,
403// QFont::NScripts,
404// QFont::NScripts,
405// QFont::NScripts,
406// QFont::NScripts,
407// //0x56 LANG_GALICIAN Galician
408// QFont::NScripts,
409// //0x57 LANG_KONKANI Konkani
410// QFont::NScripts,
411// //0x58 LANG_MANIPURI Not supported.
412// QFont::NScripts,
413// //0x59 LANG_SINDHI Not supported.
414// QFont::NScripts,
415// //0x5a LANG_SYRIAC Syriac
416// QFont::Syriac,
417// QFont::NScripts,
418// QFont::NScripts,
419// QFont::NScripts,
420// QFont::NScripts,
421// QFont::NScripts,
422//
423// //0x60 LANG_KASHMIRI Not supported.
424// QFont::NScripts,
425// //0x61 LANG_NEPALI Not supported.
426// QFont::NScripts,
427// QFont::NScripts,
428// QFont::NScripts,
429// QFont::NScripts,
430// //0x65 LANG_DIVEHI Divehi
431// QFont::NScripts,
432// QFont::NScripts,
433// QFont::NScripts,
434// QFont::NScripts,
435// QFont::NScripts,
436// QFont::NScripts,
437// QFont::NScripts,
438// QFont::NScripts,
439// QFont::NScripts,
440// QFont::NScripts,
441// QFont::NScripts,
442//
443// QFont::NScripts,
444// QFont::NScripts,
445// QFont::NScripts,
446// QFont::NScripts,
447// QFont::NScripts,
448// QFont::NScripts,
449// QFont::NScripts,
450// QFont::NScripts,
451// QFont::NScripts,
452// QFont::NScripts,
453// QFont::NScripts,
454// QFont::NScripts,
455// QFont::NScripts,
456// QFont::NScripts,
457// QFont::NScripts,
458// //0x7f LANG_INVARIANT
459// QFont::NScripts,
460//};
461//
462//static inline QFont::Script scriptForWinLanguage( DWORD langid )
463//{
464// QFont::Script script = (QFont::Script)script_for_win_language[langid];
465// if ( script == QFont::NScripts )
466// qWarning( "Qt Uniscribe support: Encountered unhandled language id %x", (unsigned int)langid );
467// return script;
468//}
469//
470//static inline bool isAsian( unsigned short ch )
471//{
472// return (ch > 0x2dff && ch < 0xfb00) || ((ch & 0xff00) == 0x1100);
473//}
474//
475//
476//// we're not using Uniscribe's BiDi algorithm, since it is (a) not 100% Unicode compliant and
477//// (b) seems to work wrongly when trying to use it with a base level != 0.
478////
479//// This function does uses Uniscribe to do the script analysis and creates items from this.
480//static void uspAppendItems(QTextEngine *engine, int &start, int &stop, BidiControl &control, QChar::Direction dir)
481//{
482// QScriptItemArray &items = engine->items;
483// const QChar *text = engine->string.unicode();
484//
485// if ( start > stop ) {
486// // #### the algorithm is currently not really safe against this. Still needs fixing.
487//// qWarning( "Bidi: appendItems() internal error" );
488// return;
489// }
490//
491// int level = control.level();
492//
493// if(dir != QChar::DirON) {
494// // add level of run (cases I1 & I2)
495// if( level % 2 ) {
496// if(dir == QChar::DirL || dir == QChar::DirAN || dir == QChar::DirEN )
497// level++;
498// } else {
499// if( dir == QChar::DirR )
500// level++;
501// else if( dir == QChar::DirAN || dir == QChar::DirEN )
502// level += 2;
503// }
504// }
505//
506// SCRIPT_ITEM s_items[256];
507// SCRIPT_ITEM *usp_items = s_items;
508//
509// int numItems;
510// HRESULT res = ScriptItemize( (WCHAR *)(text+start), stop-start+1, 255, 0, 0, usp_items, &numItems );
511//
512// if ( res == E_OUTOFMEMORY ) {
513// int alloc = 256;
514// usp_items = 0;
515// while( res == E_OUTOFMEMORY ) {
516// alloc *= 2;
517// usp_items = (SCRIPT_ITEM *)realloc( usp_items, alloc * sizeof( SCRIPT_ITEM ) );
518// res = ScriptItemize( (WCHAR *)(text+start), stop-start+1, alloc-1, 0, 0, usp_items, &numItems );
519// }
520// }
521// items.resize( items.size() + numItems );
522// int i;
523// for( i = 0; i < numItems; i++ ) {
524// QScriptItem item;
525// item.analysis = usp_items[i].a;
526// item.position = usp_items[i].iCharPos+start;
527// item.analysis.bidiLevel = level;
528// item.analysis.override = control.override();
529//
530// int rstart = usp_items[i].iCharPos;
531// int rstop = usp_items[i+1].iCharPos-1;
532// bool b = TRUE;
533// for ( int j = rstart; j <= rstop; j++ ) {
534//
535// unsigned short uc = text[j+start].unicode();
536// QChar::Category category = ::category( uc );
537// if ( uc == 0xfffcU || uc == 0x2028U ) {
538// item.analysis.script = usp_latin_script;
539// item.isObject = TRUE;
540// b = TRUE;
541// } else if ((uc >= 9 && uc <=13) ||
542// (category >= QChar::Separator_Space && category <= QChar::Separator_Paragraph)) {
543// item.analysis.script = usp_latin_script;
544// item.isSpace = TRUE;
545// item.isTab = (uc == '\t');
546// if (item.isTab)
547// item.analysis.bidiLevel = control.baseLevel();
548// b = TRUE;
549// } else if (b) {
550// b = FALSE;
551// } else {
552// continue;
553// }
554//
555// item.position = j+start;
556// items.append( item );
557// item.analysis = usp_items[i].a;
558// item.analysis.bidiLevel = level;
559// item.analysis.override = control.override();
560// item.isSpace = item.isTab = item.isObject = FALSE;
561// }
562// }
563//
564// if ( usp_items != s_items )
565// free( usp_items );
566//
567// ++stop;
568// start = stop;
569//}
570
571
572// -----------------------------------------------------------------------------------------------------
573//
574// Text engine classes
575//
576// -----------------------------------------------------------------------------------------------------
577
578
579QScriptItemArray::~QScriptItemArray()
580{
581 clear();
582 free( d );
583}
584
585void QScriptItemArray::clear()
586{
587 if ( d ) {
588 for ( unsigned int i = 0; i < d->size; i++ ) {
589 QScriptItem &si = d->items[i];
590 if ( si.fontEngine )
591 si.fontEngine->deref();
592 }
593 d->size = 0;
594 }
595}
596
597void QScriptItemArray::resize( int s )
598{
599 int alloc = ((s + 8) >> 3) << 3;
600 d = (QScriptItemArrayPrivate *)realloc( d, sizeof( QScriptItemArrayPrivate ) +
601 sizeof( QScriptItem ) * alloc );
602 d->alloc = alloc;
603}
604
605
606void QTextEngine::shape( int item ) const
607{
608 QScriptItem &si = items[item];
609
610 if ( si.num_glyphs )
611 return;
612
613 QFont::Script script = (QFont::Script)si.analysis.script;
614 int from = si.position;
615 int len = length( item );
616
617 Q_ASSERT( len > 0 );
618
619 si.glyph_data_offset = used;
620
621 if ( !si.fontEngine ) {
622//@@TODO (dmik): remove?
623// if ( hasUsp10 ) {
624// const SCRIPT_PROPERTIES *script_prop = script_properties[si.analysis.script];
625// script = scriptForWinLanguage( script_prop->langid );
626// if ( script == QFont::Latin && script_prop->fAmbiguousCharSet ) {
627// // either some asian language or something Uniscribe doesn't recognise
628// // we look at the first character to find out what it is
629// bool asian = false;
630// int l = length(item);
631// for(int i = 0; i < l; ++i) {
632// if(isAsian(string.unicode()[si.position+i].unicode())) {
633// asian = true;
634// break;
635// }
636// }
637// if (asian) {
638// // some asian language
639// int i;
640// for( i = 0; i < 5; i++ ) {
641// QFontEngine *fe = fnt->engineForScript( tryScripts[i] );
642// if ( fe->type() == QFontEngine::Box )
643// continue;
644//
645// if ( fe->canRender( string.unicode()+from, len ) ) {
646// script = tryScripts[i];
647// break;
648// }
649// }
650// }
651// }
652// }
653 si.fontEngine = fnt->engineForScript( script );
654//@@TODO (dmik): remove?
655// if ( si.fontEngine->type() == QFontEngine::Box )
656// si.fontEngine = fnt->engineForScript( QFont::NoScript );
657 si.fontEngine->ref();
658 }
659
660//@@TODO (dmik): remove?
661// if ( hasUsp10 && si.fontEngine->ttf ) {
662// int l = len;
663// si.analysis.logicalOrder = TRUE;
664// HRESULT res = E_OUTOFMEMORY;
665// HDC hdc = 0;
666//
667// do {
668// ensureSpace( l );
669//
670// res = ScriptShape( hdc, &si.fontEngine->script_cache, (WCHAR *)string.unicode() + from, len,
671// l, &si.analysis, glyphs( &si ), logClusters( &si ), glyphAttributes( &si ),
672// &si.num_glyphs );
673// if ( res == E_PENDING ) {
674// hdc = si.fontEngine->dc();
675// SelectObject( hdc, si.fontEngine->hfont );
676// } else if ( res == USP_E_SCRIPT_NOT_IN_FONT ) {
677// si.analysis.script = 0;
678// hdc = 0;
679// } else if (res == E_OUTOFMEMORY) {
680// l += 32;
681// } else if ( res != S_OK ) {
682// Q_ASSERT( FALSE );
683// }
684// } while( res != S_OK );
685//
686//
687// ABC abc;
688// res = ScriptPlace( hdc, &si.fontEngine->script_cache, glyphs( &si ), si.num_glyphs,
689// glyphAttributes( &si ), &si.analysis, advances( &si ), offsets( &si ), &abc );
690// if ( res == E_PENDING ) {
691// hdc = si.fontEngine->dc();
692// SelectObject( hdc, si.fontEngine->hfont );
693// ScriptPlace( hdc, &si.fontEngine->script_cache, glyphs( &si ), si.num_glyphs,
694// glyphAttributes( &si ), &si.analysis, advances( &si ), offsets( &si ), &abc );
695// }
696// si.width = abc.abcA + abc.abcB + abc.abcC;
697// } else {
698 Q_ASSERT( script < QFont::NScripts );
699 scriptEngines[script].shape( script, string, from, len, (QTextEngine*)this, &si );
700 si.width = 0;
701 advance_t *advances = this->advances( &si );
702 for ( int i = 0; i < si.num_glyphs; i++ )
703 si.width += advances[i];
704//@@TODO (dmik): remove?
705// }
706 si.ascent = si.fontEngine->ascent();
707 si.descent = si.fontEngine->descent();
708
709 ((QTextEngine *)this)->used += si.num_glyphs;
710}
711
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