summaryrefslogtreecommitdiff
path: root/vcl/quartz/ctfonts.cxx
blob: eb67d981fe95093131dac6b68eaac45827a8839c (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
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

#include <sal/config.h>
#include <sal/log.hxx>

#include <basegfx/polygon/b2dpolygon.hxx>
#include <basegfx/matrix/b2dhommatrix.hxx>

#include <vcl/settings.hxx>


#include <quartz/ctfonts.hxx>
#include <impfont.hxx>
#ifdef MACOSX
#include <osx/saldata.hxx>
#include <osx/salinst.h>
#endif
#include <fontinstance.hxx>
#include <fontattributes.hxx>
#include <impglyphitem.hxx>
#include <PhysicalFontCollection.hxx>
#include <quartz/salgdi.h>
#include <quartz/utils.h>
#include <sallayout.hxx>
#include <hb-coretext.h>

static double toRadian(int nDegree)
{
    return nDegree * (M_PI / 1800.0);
}

CoreTextStyle::CoreTextStyle(const PhysicalFontFace& rPFF, const FontSelectPattern& rFSP)
    : LogicalFontInstance(rPFF, rFSP)
    , mfFontStretch( 1.0 )
    , mfFontRotation( 0.0 )
    , mbFauxBold(false)
    , mpStyleDict( nullptr )
{
    double fScaledFontHeight = rFSP.mfExactHeight;

    // convert font rotation to radian
    mfFontRotation = toRadian(rFSP.mnOrientation);

    // dummy matrix so we can use CGAffineTransformConcat() below
    CGAffineTransform aMatrix = CGAffineTransformMakeTranslation(0, 0);

    // handle font stretching if any
    if( (rFSP.mnWidth != 0) && (rFSP.mnWidth != rFSP.mnHeight) )
    {
        mfFontStretch = float(rFSP.mnWidth) / rFSP.mnHeight;
        aMatrix = CGAffineTransformConcat(aMatrix, CGAffineTransformMakeScale(mfFontStretch, 1.0F));
    }

    // create the style object for CoreText font attributes
    static const CFIndex nMaxDictSize = 16; // TODO: does this really suffice?
    mpStyleDict = CFDictionaryCreateMutable( nullptr, nMaxDictSize,
                                             &kCFTypeDictionaryKeyCallBacks,
                                             &kCFTypeDictionaryValueCallBacks );

    CFBooleanRef pCFVertBool = rFSP.mbVertical ? kCFBooleanTrue : kCFBooleanFalse;
    CFDictionarySetValue( mpStyleDict, kCTVerticalFormsAttributeName, pCFVertBool );

    // fake bold
    if ( (rFSP.GetWeight() >= WEIGHT_BOLD) &&
         ((rPFF.GetWeight() < WEIGHT_SEMIBOLD) &&
          (rPFF.GetWeight() != WEIGHT_DONTKNOW)) )
    {
        mbFauxBold = true;
    }

    // fake italic
    if (((rFSP.GetItalic() == ITALIC_NORMAL) ||
         (rFSP.GetItalic() == ITALIC_OBLIQUE)) &&
        (rPFF.GetItalic() == ITALIC_NONE))
    {
        aMatrix = CGAffineTransformConcat(aMatrix, CGAffineTransformMake(1, 0, toRadian(120), 1, 0, 0));
    }

    CTFontDescriptorRef pFontDesc = reinterpret_cast<CTFontDescriptorRef>(rPFF.GetFontId());
    CTFontRef pNewCTFont = CTFontCreateWithFontDescriptor( pFontDesc, fScaledFontHeight, &aMatrix );
    CFDictionarySetValue( mpStyleDict, kCTFontAttributeName, pNewCTFont );
    CFRelease( pNewCTFont);
}

CoreTextStyle::~CoreTextStyle()
{
    if( mpStyleDict )
        CFRelease( mpStyleDict );
}

void CoreTextStyle::GetFontMetric( ImplFontMetricDataRef const & rxFontMetric )
{
    // get the matching CoreText font handle
    // TODO: is it worth it to cache the CTFontRef in SetFont() and reuse it here?
    CTFontRef aCTFontRef = static_cast<CTFontRef>(CFDictionaryGetValue( mpStyleDict, kCTFontAttributeName ));

    rxFontMetric->ImplCalcLineSpacing(this);

    // since ImplFontMetricData::mnWidth is only used for stretching/squeezing fonts
    // setting this width to the pixel height of the fontsize is good enough
    // it also makes the calculation of the stretch factor simple
    rxFontMetric->SetWidth( lrint( CTFontGetSize( aCTFontRef ) * mfFontStretch) );

    rxFontMetric->SetMinKashida(GetKashidaWidth());
}

bool CoreTextStyle::ImplGetGlyphBoundRect(sal_GlyphId nId, tools::Rectangle& rRect, bool bVertical) const
{
    CGGlyph nCGGlyph = nId;
    CTFontRef aCTFontRef = static_cast<CTFontRef>(CFDictionaryGetValue( mpStyleDict, kCTFontAttributeName ));

    SAL_WNODEPRECATED_DECLARATIONS_PUSH //TODO: 10.11 kCTFontDefaultOrientation
    const CTFontOrientation aFontOrientation = kCTFontDefaultOrientation; // TODO: horz/vert
    SAL_WNODEPRECATED_DECLARATIONS_POP
    CGRect aCGRect = CTFontGetBoundingRectsForGlyphs(aCTFontRef, aFontOrientation, &nCGGlyph, nullptr, 1);

    // Apply font rotation to non-vertical glyphs.
    if (mfFontRotation && !bVertical)
        aCGRect = CGRectApplyAffineTransform(aCGRect, CGAffineTransformMakeRotation(mfFontRotation));

    long xMin = floor(aCGRect.origin.x);
    long yMin = floor(aCGRect.origin.y);
    long xMax = ceil(aCGRect.origin.x + aCGRect.size.width);
    long yMax = ceil(aCGRect.origin.y + aCGRect.size.height);
    rRect = tools::Rectangle(xMin, -yMax, xMax, -yMin);
    return true;
}

namespace {

// callbacks from CTFontCreatePathForGlyph+CGPathApply for GetGlyphOutline()
struct GgoData { basegfx::B2DPolygon maPolygon; basegfx::B2DPolyPolygon* mpPolyPoly; };

}

static void MyCGPathApplierFunc( void* pData, const CGPathElement* pElement )
{
    basegfx::B2DPolygon& rPolygon = static_cast<GgoData*>(pData)->maPolygon;
    const int nPointCount = rPolygon.count();

    switch( pElement->type )
    {
    case kCGPathElementCloseSubpath:
    case kCGPathElementMoveToPoint:
        if( nPointCount > 0 )
        {
            static_cast<GgoData*>(pData)->mpPolyPoly->append( rPolygon );
            rPolygon.clear();
        }
        // fall through for kCGPathElementMoveToPoint:
        if( pElement->type != kCGPathElementMoveToPoint )
        {
            break;
        }
        [[fallthrough]];
    case kCGPathElementAddLineToPoint:
        rPolygon.append( basegfx::B2DPoint( +pElement->points[0].x, -pElement->points[0].y ) );
        break;

    case kCGPathElementAddCurveToPoint:
        rPolygon.append( basegfx::B2DPoint( +pElement->points[2].x, -pElement->points[2].y ) );
        rPolygon.setNextControlPoint( nPointCount - 1,
                                      basegfx::B2DPoint( pElement->points[0].x,
                                                         -pElement->points[0].y ) );
        rPolygon.setPrevControlPoint( nPointCount + 0,
                                      basegfx::B2DPoint( pElement->points[1].x,
                                                         -pElement->points[1].y ) );
        break;

    case kCGPathElementAddQuadCurveToPoint:
        {
            const basegfx::B2DPoint aStartPt = rPolygon.getB2DPoint( nPointCount-1 );
            const basegfx::B2DPoint aCtrPt1( (aStartPt.getX() + 2 * pElement->points[0].x) / 3.0,
                                             (aStartPt.getY() - 2 * pElement->points[0].y) / 3.0 );
            const basegfx::B2DPoint aCtrPt2( (+2 * pElement->points[0].x + pElement->points[1].x) / 3.0,
                                             (-2 * pElement->points[0].y - pElement->points[1].y) / 3.0 );
            rPolygon.append( basegfx::B2DPoint( +pElement->points[1].x, -pElement->points[1].y ) );
            rPolygon.setNextControlPoint( nPointCount-1, aCtrPt1 );
            rPolygon.setPrevControlPoint( nPointCount+0, aCtrPt2 );
        }
        break;
    }
}

bool CoreTextStyle::GetGlyphOutline(sal_GlyphId nId, basegfx::B2DPolyPolygon& rResult, bool) const
{
    rResult.clear();

    CGGlyph nCGGlyph = nId;
    CTFontRef pCTFont = static_cast<CTFontRef>(CFDictionaryGetValue( mpStyleDict, kCTFontAttributeName ));

    SAL_WNODEPRECATED_DECLARATIONS_PUSH
    const CTFontOrientation aFontOrientation = kCTFontDefaultOrientation;
    SAL_WNODEPRECATED_DECLARATIONS_POP
    CGRect aCGRect = CTFontGetBoundingRectsForGlyphs(pCTFont, aFontOrientation, &nCGGlyph, nullptr, 1);

    if (!CGRectIsNull(aCGRect) && CGRectIsEmpty(aCGRect))
    {
        // CTFontCreatePathForGlyph returns NULL for blank glyphs, but we want
        // to return true for them.
        return true;
    }

    CGPathRef xPath = CTFontCreatePathForGlyph( pCTFont, nCGGlyph, nullptr );
    if (!xPath)
    {
        return false;
    }

    GgoData aGgoData;
    aGgoData.mpPolyPoly = &rResult;
    CGPathApply( xPath, static_cast<void*>(&aGgoData), MyCGPathApplierFunc );
#if 0 // TODO: does OSX ensure that the last polygon is always closed?
    const CGPathElement aClosingElement = { kCGPathElementCloseSubpath, NULL };
    MyCGPathApplierFunc( (void*)&aGgoData, &aClosingElement );
#endif
    CFRelease( xPath );

    return true;
}

static hb_blob_t* getFontTable(hb_face_t* /*face*/, hb_tag_t nTableTag, void* pUserData)
{
    sal_uLong nLength = 0;
    unsigned char* pBuffer = nullptr;
    CoreTextFontFace* pFont = static_cast<CoreTextFontFace*>(pUserData);
    nLength = pFont->GetFontTable(nTableTag, nullptr);
    if (nLength > 0)
    {
        pBuffer = new unsigned char[nLength];
        pFont->GetFontTable(nTableTag, pBuffer);
    }

    hb_blob_t* pBlob = nullptr;
    if (pBuffer != nullptr)
        pBlob = hb_blob_create(reinterpret_cast<const char*>(pBuffer), nLength, HB_MEMORY_MODE_READONLY,
                               pBuffer, [](void* data){ delete[] static_cast<unsigned char*>(data); });
    return pBlob;
}

hb_font_t* CoreTextStyle::ImplInitHbFont()
{
    hb_face_t* pHbFace = hb_face_create_for_tables(getFontTable, GetFontFace(), nullptr);

    return InitHbFont(pHbFace);
}

rtl::Reference<LogicalFontInstance> CoreTextFontFace::CreateFontInstance(const FontSelectPattern& rFSD) const
{
    return new CoreTextStyle(*this, rFSD);
}

int CoreTextFontFace::GetFontTable( const char pTagName[5], unsigned char* pResultBuf ) const
{
    SAL_WARN_IF( pTagName[4]!='\0', "vcl", "CoreTextFontFace::GetFontTable with invalid tagname!" );

    const CTFontTableTag nTagCode = (pTagName[0]<<24) + (pTagName[1]<<16) + (pTagName[2]<<8) + (pTagName[3]<<0);

    return GetFontTable(nTagCode, pResultBuf);
}

int CoreTextFontFace::GetFontTable(uint32_t nTagCode, unsigned char* pResultBuf ) const
{
    // get the raw table length
    CTFontDescriptorRef pFontDesc = reinterpret_cast<CTFontDescriptorRef>( GetFontId());
    CTFontRef rCTFont = CTFontCreateWithFontDescriptor( pFontDesc, 0.0, nullptr);
    const uint32_t opts( kCTFontTableOptionNoOptions );
    CFDataRef pDataRef = CTFontCopyTable( rCTFont, nTagCode, opts);
    CFRelease( rCTFont);
    if( !pDataRef)
        return 0;

    const CFIndex nByteLength = CFDataGetLength( pDataRef);

    // get the raw table data if requested
    if( pResultBuf && (nByteLength > 0))
    {
        const CFRange aFullRange = CFRangeMake( 0, nByteLength);
        CFDataGetBytes( pDataRef, aFullRange, reinterpret_cast<UInt8*>(pResultBuf));
    }

    CFRelease( pDataRef);

    return static_cast<int>(nByteLength);
}

FontAttributes DevFontFromCTFontDescriptor( CTFontDescriptorRef pFD, bool* bFontEnabled )
{
    // all CoreText fonts are device fonts that can rotate just fine
    FontAttributes rDFA;
    rDFA.SetQuality( 0 );

    // reset the font attributes
    rDFA.SetFamilyType( FAMILY_DONTKNOW );
    rDFA.SetPitch( PITCH_VARIABLE );
    rDFA.SetWidthType( WIDTH_NORMAL );
    rDFA.SetWeight( WEIGHT_NORMAL );
    rDFA.SetItalic( ITALIC_NONE );
    rDFA.SetSymbolFlag( false );

    // get font name
#ifdef MACOSX
    CFStringRef pLang = nullptr;
    CFStringRef pFamilyName = static_cast<CFStringRef>(
            CTFontDescriptorCopyLocalizedAttribute( pFD, kCTFontFamilyNameAttribute, &pLang ));

    if ( !pLang )
    {
        if( pFamilyName )
        {
            CFRelease( pFamilyName );
        }
        pFamilyName = static_cast<CFStringRef>(CTFontDescriptorCopyAttribute( pFD, kCTFontFamilyNameAttribute ));
    }
#else
    // No "Application" on iOS. And it is unclear whether this code
    // snippet will actually ever get invoked on iOS anyway. So just
    // use the old code that uses a non-localized font name.
    CFStringRef pFamilyName = (CFStringRef)CTFontDescriptorCopyAttribute( pFD, kCTFontFamilyNameAttribute );
#endif

    rDFA.SetFamilyName( GetOUString( pFamilyName ) );

    // get font style
    CFStringRef pStyleName = static_cast<CFStringRef>(CTFontDescriptorCopyAttribute( pFD, kCTFontStyleNameAttribute ));
    rDFA.SetStyleName( GetOUString( pStyleName ) );

    // get font-enabled status
    if( bFontEnabled )
    {
        int bEnabled = TRUE; // by default (and when we're on macOS < 10.6) it's "enabled"
        CFNumberRef pEnabled = static_cast<CFNumberRef>(CTFontDescriptorCopyAttribute( pFD, kCTFontEnabledAttribute ));
        CFNumberGetValue( pEnabled, kCFNumberIntType, &bEnabled );
        *bFontEnabled = bEnabled;
    }

    // get font attributes
    CFDictionaryRef pAttrDict = static_cast<CFDictionaryRef>(CTFontDescriptorCopyAttribute( pFD, kCTFontTraitsAttribute ));

    if (bFontEnabled && *bFontEnabled)
    {
        // Ignore font formats not supported.
        int nFormat;
        CFNumberRef pFormat = static_cast<CFNumberRef>(CTFontDescriptorCopyAttribute(pFD, kCTFontFormatAttribute));
        CFNumberGetValue(pFormat, kCFNumberIntType, &nFormat);
        if (nFormat == kCTFontFormatUnrecognized || nFormat == kCTFontFormatPostScript || nFormat == kCTFontFormatBitmap)
        {
            SAL_INFO("vcl.fonts", "Ignoring font with unsupported format: " << rDFA.GetFamilyName());
            *bFontEnabled = false;
        }
        CFRelease(pFormat);
    }

    // get symbolic trait
    // TODO: use other traits such as MonoSpace/Condensed/Expanded or Vertical too
    SInt64 nSymbolTrait = 0;
    CFNumberRef pSymbolNum = nullptr;
    if( CFDictionaryGetValueIfPresent( pAttrDict, kCTFontSymbolicTrait, reinterpret_cast<const void**>(&pSymbolNum) ) )
    {
        CFNumberGetValue( pSymbolNum, kCFNumberSInt64Type, &nSymbolTrait );
        rDFA.SetSymbolFlag( (nSymbolTrait & kCTFontClassMaskTrait) == kCTFontSymbolicClass );
    }

    // get the font weight
    double fWeight = 0;
    CFNumberRef pWeightNum = static_cast<CFNumberRef>(CFDictionaryGetValue( pAttrDict, kCTFontWeightTrait ));
    CFNumberGetValue( pWeightNum, kCFNumberDoubleType, &fWeight );
    int nInt = WEIGHT_NORMAL;

    // Special case fixes

    // tdf#67744: Courier Std Medium is always bold. We get a kCTFontWeightTrait of 0.23 which
    // surely must be wrong.
    if (rDFA.GetFamilyName() == "Courier Std" &&
        (rDFA.GetStyleName() == "Medium" || rDFA.GetStyleName() == "Medium Oblique") &&
        fWeight > 0.2)
    {
        fWeight = 0;
    }

    // tdf#68889: Ditto for Gill Sans MT Pro. Here I can kinda understand it, maybe the
    // kCTFontWeightTrait is intended to give a subjective "optical" impression of how the font
    // looks, and Gill Sans MT Pro Medium is kinda heavy. But with the way LibreOffice uses fonts,
    // we still should think of it as being "medium" weight.
    if (rDFA.GetFamilyName() == "Gill Sans MT Pro" &&
        (rDFA.GetStyleName() == "Medium" || rDFA.GetStyleName() == "Medium Italic") &&
        fWeight > 0.2)
    {
        fWeight = 0;
    }

    if( fWeight > 0 )
    {
        nInt = rint(int(WEIGHT_NORMAL) + fWeight * ((WEIGHT_BLACK - WEIGHT_NORMAL)/0.68));
        if( nInt > WEIGHT_BLACK )
        {
            nInt = WEIGHT_BLACK;
        }
    }
    else if( fWeight < 0 )
    {
        nInt = rint(int(WEIGHT_NORMAL) + fWeight * ((WEIGHT_NORMAL - WEIGHT_THIN)/0.8));
        if( nInt < WEIGHT_THIN )
        {
            nInt = WEIGHT_THIN;
        }
    }
    rDFA.SetWeight( static_cast<FontWeight>(nInt) );

    // get the font slant
    double fSlant = 0;
    CFNumberRef pSlantNum = static_cast<CFNumberRef>(CFDictionaryGetValue( pAttrDict, kCTFontSlantTrait ));
    CFNumberGetValue( pSlantNum, kCFNumberDoubleType, &fSlant );
    if( fSlant >= 0.035 )
    {
        rDFA.SetItalic( ITALIC_NORMAL );
    }
    // get width trait
    double fWidth = 0;
    CFNumberRef pWidthNum = static_cast<CFNumberRef>(CFDictionaryGetValue( pAttrDict, kCTFontWidthTrait ));
    CFNumberGetValue( pWidthNum, kCFNumberDoubleType, &fWidth );
    nInt = WIDTH_NORMAL;

    if( fWidth > 0 )
    {
        nInt = rint( int(WIDTH_NORMAL) + fWidth * ((WIDTH_ULTRA_EXPANDED - WIDTH_NORMAL)/0.4));
        if( nInt > WIDTH_ULTRA_EXPANDED )
        {
            nInt = WIDTH_ULTRA_EXPANDED;
        }
    }
    else if( fWidth < 0 )
    {
        nInt = rint( int(WIDTH_NORMAL) + fWidth * ((WIDTH_NORMAL - WIDTH_ULTRA_CONDENSED)/0.5));
        if( nInt < WIDTH_ULTRA_CONDENSED )
        {
            nInt = WIDTH_ULTRA_CONDENSED;
        }
    }
    rDFA.SetWidthType( static_cast<FontWidth>(nInt) );

    // release the attribute dict that we had copied
    CFRelease( pAttrDict );

    // TODO? also use the HEAD table if available to get more attributes
//  CFDataRef CTFontCopyTable( CTFontRef, kCTFontTableHead, /*kCTFontTableOptionNoOptions*/kCTFontTableOptionExcludeSynthetic );

    return rDFA;
}

static void fontEnumCallBack( const void* pValue, void* pContext )
{
    CTFontDescriptorRef pFD = static_cast<CTFontDescriptorRef>(pValue);

    bool bFontEnabled;
    FontAttributes rDFA = DevFontFromCTFontDescriptor( pFD, &bFontEnabled );

    if( bFontEnabled)
    {
        const sal_IntPtr nFontId = reinterpret_cast<sal_IntPtr>(pValue);
        rtl::Reference<CoreTextFontFace> pFontData = new CoreTextFontFace( rDFA, nFontId );
        SystemFontList* pFontList = static_cast<SystemFontList*>(pContext);
        pFontList->AddFont( pFontData.get() );
    }
}

SystemFontList::SystemFontList()
  : mpCTFontCollection( nullptr )
  , mpCTFontArray( nullptr )
{}

SystemFontList::~SystemFontList()
{
    maFontContainer.clear();

    if( mpCTFontArray )
    {
        CFRelease( mpCTFontArray );
    }
    if( mpCTFontCollection )
    {
        CFRelease( mpCTFontCollection );
    }
}

void SystemFontList::AddFont( CoreTextFontFace* pFontData )
{
    sal_IntPtr nFontId = pFontData->GetFontId();
    maFontContainer[ nFontId ] = pFontData;
}

void SystemFontList::AnnounceFonts( PhysicalFontCollection& rFontCollection ) const
{
    for(const auto& rEntry : maFontContainer )
    {
        rFontCollection.Add( rEntry.second.get() );
    }
}

CoreTextFontFace* SystemFontList::GetFontDataFromId( sal_IntPtr nFontId ) const
{
    auto it = maFontContainer.find( nFontId );
    if( it == maFontContainer.end() )
    {
        return nullptr;
    }
    return (*it).second.get();
}

bool SystemFontList::Init()
{
    // enumerate available system fonts
    static const int nMaxDictEntries = 8;
    CFMutableDictionaryRef pCFDict = CFDictionaryCreateMutable( nullptr,
                                                                nMaxDictEntries,
                                                                &kCFTypeDictionaryKeyCallBacks,
                                                                &kCFTypeDictionaryValueCallBacks );

    CFDictionaryAddValue( pCFDict, kCTFontCollectionRemoveDuplicatesOption, kCFBooleanTrue );
    mpCTFontCollection = CTFontCollectionCreateFromAvailableFonts( pCFDict );
    CFRelease( pCFDict );
    mpCTFontArray = CTFontCollectionCreateMatchingFontDescriptors( mpCTFontCollection );

    const int nFontCount = CFArrayGetCount( mpCTFontArray );
    const CFRange aFullRange = CFRangeMake( 0, nFontCount );
    CFArrayApplyFunction( mpCTFontArray, aFullRange, fontEnumCallBack, this );

    return true;
}

SystemFontList* GetCoretextFontList()
{
    SystemFontList* pList = new SystemFontList();
    if( !pList->Init() )
    {
        delete pList;
        return nullptr;
    }

    return pList;
}

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