summaryrefslogtreecommitdiff
path: root/vcl/generic/glyphs/gcach_layout.cxx
blob: ab008b20fba533119b35d7e5af7ddd7f09fdb67d (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
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*************************************************************************
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * Copyright 2000, 2010 Oracle and/or its affiliates.
 *
 * OpenOffice.org - a multi-platform office productivity suite
 *
 * This file is part of OpenOffice.org.
 *
 * OpenOffice.org is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 3
 * only, as published by the Free Software Foundation.
 *
 * OpenOffice.org is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License version 3 for more details
 * (a copy is included in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3 along with OpenOffice.org.  If not, see
 * <http://www.openoffice.org/license.html>
 * for a copy of the LGPLv3 License.
 *
 ************************************************************************/

#include <gcach_ftyp.hxx>
#include <sallayout.hxx>
#include <salgdi.hxx>

#include <vcl/svapp.hxx>

#include <sal/alloca.h>
#include <rtl/instance.hxx>

#include <layout/LayoutEngine.h>
#include <layout/LEFontInstance.h>
#include <layout/LEScripts.h>

#include <unicode/uscript.h>
#include <unicode/ubidi.h>

// =======================================================================
// layout implementation for ServerFont
// =======================================================================

ServerFontLayout::ServerFontLayout( ServerFont& rFont )
:   mrServerFont( rFont )
{}

void ServerFontLayout::DrawText( SalGraphics& rSalGraphics ) const
{
    rSalGraphics.DrawServerFontLayout( *this );
}

// -----------------------------------------------------------------------

bool ServerFontLayout::LayoutText( ImplLayoutArgs& rArgs )
{
    ServerFontLayoutEngine* pLE = mrServerFont.GetLayoutEngine();
    assert(pLE);
    bool bRet = pLE ? pLE->layout(*this, rArgs) : false;
    return bRet;
}

// -----------------------------------------------------------------------

void ServerFontLayout::AdjustLayout( ImplLayoutArgs& rArgs )
{
    GenericSalLayout::AdjustLayout( rArgs );

    // apply asian kerning if the glyphs are not already formatted
    if( (rArgs.mnFlags & SAL_LAYOUT_KERNING_ASIAN)
    && !(rArgs.mnFlags & SAL_LAYOUT_VERTICAL) )
        if( (rArgs.mpDXArray != NULL) || (rArgs.mnLayoutWidth != 0) )
            ApplyAsianKerning( rArgs.mpStr, rArgs.mnLength );

    // insert kashidas where requested by the formatting array
    if( (rArgs.mnFlags & SAL_LAYOUT_KASHIDA_JUSTIFICATON) && rArgs.mpDXArray )
    {
        int nKashidaIndex = mrServerFont.GetGlyphIndex( 0x0640 );
        if( nKashidaIndex != 0 )
        {
            const GlyphMetric& rGM = mrServerFont.GetGlyphMetric( nKashidaIndex );
            KashidaJustify( nKashidaIndex, rGM.GetCharWidth() );
            // TODO: kashida-GSUB/GPOS
        }
    }
}

// =======================================================================
// bridge to ICU LayoutEngine
// =======================================================================

using namespace U_ICU_NAMESPACE;

static const LEGlyphID ICU_DELETED_GLYPH = 0xFFFF;
static const LEGlyphID ICU_MARKED_GLYPH = 0xFFFE;

// -----------------------------------------------------------------------

class IcuFontFromServerFont
: public LEFontInstance
{
private:
    ServerFont&     mrServerFont;

public:
                            IcuFontFromServerFont( ServerFont& rFont )
                            : mrServerFont( rFont )
                            {}

    virtual const void*     getFontTable(LETag tableTag) const;
    virtual le_int32        getUnitsPerEM() const;
    virtual float           getXPixelsPerEm() const;
    virtual float           getYPixelsPerEm() const;
    virtual float           getScaleFactorX() const;
    virtual float           getScaleFactorY() const;

    using LEFontInstance::mapCharToGlyph;
    virtual LEGlyphID       mapCharToGlyph( LEUnicode32 ch ) const;
    virtual LEGlyphID       mapCharToGlyph( LEUnicode32 ch, const LECharMapper *mapper, le_bool filterZeroWidth ) const;

    virtual le_int32        getAscent() const;
    virtual le_int32        getDescent() const;
    virtual le_int32        getLeading() const;

    virtual void            getGlyphAdvance( LEGlyphID glyph, LEPoint &advance ) const;
    virtual le_bool         getGlyphPoint( LEGlyphID glyph, le_int32 pointNumber, LEPoint& point ) const;
};

// -----------------------------------------------------------------------

const void* IcuFontFromServerFont::getFontTable( LETag nICUTableTag ) const
{
    char pTagName[5];
    pTagName[0] = (char)(nICUTableTag >> 24);
    pTagName[1] = (char)(nICUTableTag >> 16);
    pTagName[2] = (char)(nICUTableTag >>  8);
    pTagName[3] = (char)(nICUTableTag);
    pTagName[4] = 0;

    sal_uLong nLength;
    const unsigned char* pBuffer = mrServerFont.GetTable( pTagName, &nLength );
    SAL_INFO("vcl", "IcuGetTable(\"" << pTagName << "\") => " << pBuffer);
    SAL_INFO(
        "vcl",
        "font( h=" << mrServerFont.GetFontSelData().mnHeight << ", \""
        << mrServerFont.GetFontFileName()->getStr() << "\" )");
    return pBuffer;
}

// -----------------------------------------------------------------------

le_int32 IcuFontFromServerFont::getUnitsPerEM() const
{
    return mrServerFont.GetEmUnits();
}

// -----------------------------------------------------------------------

float IcuFontFromServerFont::getXPixelsPerEm() const
{
    const FontSelectPattern& r = mrServerFont.GetFontSelData();
    float fX = r.mnWidth ? r.mnWidth : r.mnHeight;
    return fX;
}

// -----------------------------------------------------------------------

float IcuFontFromServerFont::getYPixelsPerEm() const
{
    float fY = mrServerFont.GetFontSelData().mnHeight;
    return fY;
}

// -----------------------------------------------------------------------

float IcuFontFromServerFont::getScaleFactorX() const
{
    return 1.0;
}

// -----------------------------------------------------------------------

float IcuFontFromServerFont::getScaleFactorY() const
{
    return 1.0;
}

// -----------------------------------------------------------------------

LEGlyphID IcuFontFromServerFont::mapCharToGlyph( LEUnicode32 ch ) const
{
    LEGlyphID nGlyphIndex = mrServerFont.GetRawGlyphIndex( ch );
    return nGlyphIndex;
}

LEGlyphID IcuFontFromServerFont::mapCharToGlyph( LEUnicode32 ch, const LECharMapper *mapper, le_bool /*filterZeroWidth*/ ) const
{
    /*
     fdo#31821, icu has...
      >│93          if (filterZeroWidth && (mappedChar == 0x200C || mappedChar == 0x200D)) {                                            │
       │94              return canDisplay(mappedChar) ? 0x0001 : 0xFFFF;                                                                 │
       │95          }
     so only the Indic layouts allow the joiners to get mapped to glyphs
    */
    return LEFontInstance::mapCharToGlyph( ch, mapper, false );
}

// -----------------------------------------------------------------------

le_int32 IcuFontFromServerFont::getAscent() const
{
    const FT_Size_Metrics& rMetrics = mrServerFont.GetMetricsFT();
    le_int32 nAscent = (+rMetrics.ascender + 32) >> 6;
    return nAscent;
}

// -----------------------------------------------------------------------

le_int32 IcuFontFromServerFont::getDescent() const
{
    const FT_Size_Metrics& rMetrics = mrServerFont.GetMetricsFT();
    le_int32 nDescent = (-rMetrics.descender + 32) >> 6;
    return nDescent;
}

// -----------------------------------------------------------------------

le_int32 IcuFontFromServerFont::getLeading() const
{
    const FT_Size_Metrics& rMetrics = mrServerFont.GetMetricsFT();
    le_int32 nLeading = ((rMetrics.height - rMetrics.ascender + rMetrics.descender) + 32) >> 6;
    return nLeading;
}

// -----------------------------------------------------------------------

void IcuFontFromServerFont::getGlyphAdvance( LEGlyphID nGlyphIndex,
    LEPoint &advance ) const
{
    if( (nGlyphIndex == ICU_MARKED_GLYPH)
    ||  (nGlyphIndex == ICU_DELETED_GLYPH) )
    {
        // deleted glyph or mark glyph has not advance
        advance.fX = 0;
    }
    else
    {
        const GlyphMetric& rGM = mrServerFont.GetGlyphMetric( nGlyphIndex );
        advance.fX = rGM.GetCharWidth();
    }

    advance.fY = 0;
}

// -----------------------------------------------------------------------

le_bool IcuFontFromServerFont::getGlyphPoint( LEGlyphID,
    le_int32 pointNumber, LEPoint& ) const
{
    //TODO: replace dummy implementation
    SAL_INFO("vcl", "getGlyphPoint(" << pointNumber << ")");
    return false;
}

// =======================================================================

class IcuLayoutEngine : public ServerFontLayoutEngine
{
private:
    IcuFontFromServerFont   maIcuFont;

    le_int32                meScriptCode;
    LayoutEngine*           mpIcuLE;

public:
                            IcuLayoutEngine( ServerFont& );
    virtual                 ~IcuLayoutEngine();

    virtual bool            layout( ServerFontLayout&, ImplLayoutArgs& );
};

// -----------------------------------------------------------------------

IcuLayoutEngine::IcuLayoutEngine( ServerFont& rServerFont )
:   maIcuFont( rServerFont ),
    meScriptCode( USCRIPT_INVALID_CODE ),
    mpIcuLE( NULL )
{}

// -----------------------------------------------------------------------

IcuLayoutEngine::~IcuLayoutEngine()
{
    delete mpIcuLE;
}

// -----------------------------------------------------------------------

static bool lcl_CharIsJoiner(sal_Unicode cChar)
{
    return ((cChar == 0x200C) || (cChar == 0x200D));
}

//See https://bugs.freedesktop.org/show_bug.cgi?id=31016
#define ARABIC_BANDAID

bool IcuLayoutEngine::layout(ServerFontLayout& rLayout, ImplLayoutArgs& rArgs)
{
    le_int32 nLayoutFlags = 0;
    if (rArgs.mnFlags & SAL_LAYOUT_KERNING_PAIRS)
        nLayoutFlags |= LayoutEngine::kTypoFlagKern;
    if (rArgs.mnFlags & SAL_LAYOUT_ENABLE_LIGATURES)
        nLayoutFlags |= LayoutEngine::kTypoFlagLiga;

    LEUnicode* pIcuChars;
    if( sizeof(LEUnicode) == sizeof(*rArgs.mpStr) )
        pIcuChars = (LEUnicode*)rArgs.mpStr;
    else
    {
        // this conversion will only be needed when either
        // ICU's or OOo's unicodes stop being unsigned shorts
        // TODO: watch out for surrogates!
        pIcuChars = (LEUnicode*)alloca( rArgs.mnLength * sizeof(LEUnicode) );
        for( xub_StrLen ic = 0; ic < rArgs.mnLength; ++ic )
            pIcuChars[ic] = static_cast<LEUnicode>( rArgs.mpStr[ic] );
    }

    // allocate temporary arrays, note: round to even
    int nGlyphCapacity = (3 * (rArgs.mnEndCharPos - rArgs.mnMinCharPos ) | 15) + 1;

    rLayout.Reserve(nGlyphCapacity);

    struct IcuPosition{ float fX, fY; };
    const int nAllocSize = sizeof(LEGlyphID) + sizeof(le_int32) + sizeof(IcuPosition);
    LEGlyphID* pIcuGlyphs = (LEGlyphID*)alloca( (nGlyphCapacity * nAllocSize) + sizeof(IcuPosition) );
    le_int32* pCharIndices = (le_int32*)((char*)pIcuGlyphs + nGlyphCapacity * sizeof(LEGlyphID) );
    IcuPosition* pGlyphPositions = (IcuPosition*)((char*)pCharIndices + nGlyphCapacity * sizeof(le_int32) );

    ServerFont& rFont = rLayout.GetServerFont();

    UErrorCode rcI18n = U_ZERO_ERROR;
    LEErrorCode rcIcu = LE_NO_ERROR;
    Point aNewPos( 0, 0 );
    for( int nGlyphCount = 0;; )
    {
        int nMinRunPos, nEndRunPos;
        bool bRightToLeft;
        if( !rArgs.GetNextRun( &nMinRunPos, &nEndRunPos, &bRightToLeft ) )
            break;

        // find matching script
        // TODO: split up bidi run into script runs
        le_int32 eScriptCode = -1;
        for( int i = nMinRunPos; i < nEndRunPos; ++i )
        {
            le_int32 eNextScriptCode = uscript_getScript( pIcuChars[i], &rcI18n );
            if( (eNextScriptCode > USCRIPT_INHERITED) )
            {
                eScriptCode = eNextScriptCode;
                if (eNextScriptCode != latnScriptCode)
                    break;
            }
        }
        if( eScriptCode < 0 )   // TODO: handle errors better
            eScriptCode = latnScriptCode;

        // get layout engine matching to this script
        // no engine change necessary if script is latin
        if( !mpIcuLE || ((eScriptCode != meScriptCode) && (eScriptCode > USCRIPT_INHERITED)) )
        {
            // TODO: cache multiple layout engines when multiple scripts are used
            delete mpIcuLE;
            meScriptCode = eScriptCode;
            le_int32 eLangCode = 0; // TODO: get better value
            mpIcuLE = LayoutEngine::layoutEngineFactory( &maIcuFont, eScriptCode, eLangCode, nLayoutFlags, rcIcu );
            if( LE_FAILURE(rcIcu) )
            {
                delete mpIcuLE;
                mpIcuLE = NULL;
            }
        }

        // fall back to default layout if needed
        if( !mpIcuLE )
            break;

        // run ICU layout engine
        // TODO: get enough context, remove extra glyps below
        int nRawRunGlyphCount = mpIcuLE->layoutChars( pIcuChars,
            nMinRunPos, nEndRunPos - nMinRunPos, rArgs.mnLength,
            bRightToLeft, aNewPos.X(), aNewPos.Y(), rcIcu );
        if( LE_FAILURE(rcIcu) )
            return false;

        // import layout info from icu
        mpIcuLE->getGlyphs( pIcuGlyphs, rcIcu );
        mpIcuLE->getCharIndices( pCharIndices, rcIcu );
        mpIcuLE->getGlyphPositions( &pGlyphPositions->fX, rcIcu );
        mpIcuLE->reset(); // TODO: get rid of this, PROBLEM: crash at exit when removed
        if( LE_FAILURE(rcIcu) )
            return false;

        // layout bidi/script runs and export them to a ServerFontLayout
        // convert results to GlyphItems
        int nLastCharPos = -1;
        int nClusterMinPos = -1;
        int nClusterMaxPos = -1;
        bool bClusterStart = true;
        int nFilteredRunGlyphCount = 0;
        const IcuPosition* pPos = pGlyphPositions;
        for( int i = 0; i < nRawRunGlyphCount; ++i, ++pPos )
        {
            LEGlyphID nGlyphIndex = pIcuGlyphs[i];
            // ignore glyphs which were marked or deleted by ICU
            if( (nGlyphIndex == ICU_MARKED_GLYPH)
            ||  (nGlyphIndex == ICU_DELETED_GLYPH) )
                continue;

            // adjust the relative char pos
            int nCharPos = pCharIndices[i];
            if( nCharPos >= 0 ) {
                nCharPos += nMinRunPos;
                // ICU seems to return bad pCharIndices
                // for some combinations of ICU+font+text
                // => better give up now than crash later
                if( nCharPos >= nEndRunPos )
                    continue;
            }

            // if needed request glyph fallback by updating LayoutArgs
            if( !nGlyphIndex )
            {
                if( nCharPos >= 0 )
                {
                    rArgs.NeedFallback( nCharPos, bRightToLeft );
                    if ( (nCharPos > 0) && lcl_CharIsJoiner(rArgs.mpStr[nCharPos-1]) )
                        rArgs.NeedFallback( nCharPos-1, bRightToLeft );
                    else if ( (nCharPos + 1 < nEndRunPos) && lcl_CharIsJoiner(rArgs.mpStr[nCharPos+1]) )
                        rArgs.NeedFallback( nCharPos+1, bRightToLeft );
                }

                if( SAL_LAYOUT_FOR_FALLBACK & rArgs.mnFlags )
                    continue;
            }


            // apply vertical flags, etc.
            bool bDiacritic = false;
            if( nCharPos >= 0 )
            {
                sal_UCS4 aChar = rArgs.mpStr[ nCharPos ];
                nGlyphIndex = rFont.FixupGlyphIndex( nGlyphIndex, aChar );

                // #i99367# HACK: try to detect all diacritics
                if( aChar>=0x0300 && aChar<0x2100 )
                    bDiacritic = IsDiacritic( aChar );
            }

            // get glyph position and its metrics
            aNewPos = Point( (int)(pPos->fX+0.5), (int)(pPos->fY+0.5) );
            const GlyphMetric& rGM = rFont.GetGlyphMetric( nGlyphIndex );
            int nGlyphWidth = rGM.GetCharWidth();
            int nNewWidth = nGlyphWidth;
            if( nGlyphWidth <= 0 )
                bDiacritic |= true;
            // #i99367# force all diacritics to zero width
            // TODO: we need mnOrigWidth/mnLogicWidth/mnNewWidth
            else if( bDiacritic )
                nGlyphWidth = nNewWidth = 0;
            else
            {
                // Hack, find next +ve width glyph and calculate current
                // glyph width by substracting the two posituons
                const IcuPosition* pNextPos = pPos+1;
                for ( int j = i + 1; j <= nRawRunGlyphCount; ++j, ++pNextPos )
                {
                    if ( j == nRawRunGlyphCount )
                    {
                        nNewWidth = static_cast<int>(pNextPos->fX - pPos->fX);
                        break;
                    }

                    LEGlyphID nNextGlyphIndex = pIcuGlyphs[j];
                    if( (nNextGlyphIndex == ICU_MARKED_GLYPH)
                    ||  (nNextGlyphIndex == ICU_DELETED_GLYPH) )
                        continue;

                    const GlyphMetric& rNextGM = rFont.GetGlyphMetric( nNextGlyphIndex );
                    int nNextGlyphWidth = rNextGM.GetCharWidth();
                    if ( nNextGlyphWidth > 0 )
                    {
                        nNewWidth = static_cast<int>(pNextPos->fX - pPos->fX);
                        break;
                    }
                }
            }

            // heuristic to detect glyph clusters
            bool bInCluster = true;
            if( nLastCharPos == -1 )
            {
                nClusterMinPos = nClusterMaxPos = nCharPos;
                bInCluster = false;
            }
            else if( !bRightToLeft )
            {
                // left-to-right case
                if( nClusterMinPos > nCharPos )
                    nClusterMinPos = nCharPos;      // extend cluster
                else if( nCharPos <= nClusterMaxPos )
                    /*NOTHING*/;                    // inside cluster
                else if( bDiacritic )
                    nClusterMaxPos = nCharPos;      // add diacritic to cluster
                else {
                    nClusterMinPos = nClusterMaxPos = nCharPos; // new cluster
                    bInCluster = false;
                }
            }
            else
            {
                // right-to-left case
                if( nClusterMaxPos < nCharPos )
                    nClusterMaxPos = nCharPos;      // extend cluster
                else if( nCharPos >= nClusterMinPos )
                    /*NOTHING*/;                    // inside cluster
                else if( bDiacritic )
                {
                    nClusterMinPos = nCharPos;      // ICU often has [diacritic* baseglyph*]
                    if( bClusterStart ) {
                        nClusterMaxPos = nCharPos;
                        bInCluster = false;
                    }
                }
                else
                {
                    nClusterMinPos = nClusterMaxPos = nCharPos; // new cluster
                    bInCluster = !bClusterStart;
                }
            }

            long nGlyphFlags = 0;
            if( bInCluster )
                nGlyphFlags |= GlyphItem::IS_IN_CLUSTER;
            if( bRightToLeft )
                nGlyphFlags |= GlyphItem::IS_RTL_GLYPH;
            if( bDiacritic )
                nGlyphFlags |= GlyphItem::IS_DIACRITIC;

            // add resulting glyph item to layout
            GlyphItem aGI( nCharPos, nGlyphIndex, aNewPos, nGlyphFlags, nGlyphWidth );
#ifdef ARABIC_BANDAID
            aGI.mnNewWidth = nNewWidth;
#endif
            rLayout.AppendGlyph( aGI );
            ++nFilteredRunGlyphCount;
            nLastCharPos = nCharPos;
            bClusterStart = !aGI.IsDiacritic(); // TODO: only needed in RTL-codepath
        }
        aNewPos = Point( (int)(pPos->fX+0.5), (int)(pPos->fY+0.5) );
        nGlyphCount += nFilteredRunGlyphCount;
    }

    // sort glyphs in visual order
    // and then in logical order (e.g. diacritics after cluster start)
    rLayout.SortGlyphItems();

    // determine need for kashida justification
    if( (rArgs.mpDXArray || rArgs.mnLayoutWidth)
    &&  ((meScriptCode == arabScriptCode) || (meScriptCode == syrcScriptCode)) )
        rArgs.mnFlags |= SAL_LAYOUT_KASHIDA_JUSTIFICATON;

    return true;
}

// =======================================================================

ServerFontLayoutEngine* ServerFont::GetLayoutEngine()
{
    // find best layout engine for font, platform, script and language
    if (!mpLayoutEngine)
        mpLayoutEngine = new IcuLayoutEngine(*this);
    return mpLayoutEngine;
}

// =======================================================================

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */