source: trunk/src/gui/text/qfontengine_qpf.cpp@ 890

Last change on this file since 890 was 846, checked in by Dmitry A. Kuminov, 14 years ago

trunk: Merged in qt 4.7.2 sources from branches/vendor/nokia/qt.
File size: 37.9 KB
Line 
1/****************************************************************************
2**
3** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
4** All rights reserved.
5** Contact: Nokia Corporation ([email protected])
6**
7** This file is part of the QtGui module of the Qt Toolkit.
8**
9** $QT_BEGIN_LICENSE:LGPL$
10** Commercial Usage
11** Licensees holding valid Qt Commercial licenses may use this file in
12** accordance with the Qt Commercial License Agreement provided with the
13** Software or, alternatively, in accordance with the terms contained in
14** a written agreement between you and Nokia.
15**
16** GNU Lesser General Public License Usage
17** Alternatively, this file may be used under the terms of the GNU Lesser
18** General Public License version 2.1 as published by the Free Software
19** Foundation and appearing in the file LICENSE.LGPL included in the
20** packaging of this file. Please review the following information to
21** ensure the GNU Lesser General Public License version 2.1 requirements
22** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
23**
24** In addition, as a special exception, Nokia gives you certain additional
25** rights. These rights are described in the Nokia Qt LGPL Exception
26** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
27**
28** GNU General Public License Usage
29** Alternatively, this file may be used under the terms of the GNU
30** General Public License version 3.0 as published by the Free Software
31** Foundation and appearing in the file LICENSE.GPL included in the
32** packaging of this file. Please review the following information to
33** ensure the GNU General Public License version 3.0 requirements will be
34** met: http://www.gnu.org/copyleft/gpl.html.
35**
36** If you have questions regarding the use of this file, please contact
37** Nokia at [email protected].
38** $QT_END_LICENSE$
39**
40****************************************************************************/
41
42#include "qfontengine_qpf_p.h"
43
44#include "private/qpaintengine_raster_p.h"
45#include <QtCore/qlibraryinfo.h>
46#include <QtCore/qfileinfo.h>
47
48#include <QtCore/qfile.h>
49#include <QtCore/qdir.h>
50#include <QtCore/qbuffer.h>
51#if !defined(QT_NO_FREETYPE)
52#include "private/qfontengine_ft_p.h"
53#endif
54#include "private/qcore_unix_p.h" // overrides QT_OPEN
55
56// for mmap
57#include <stdlib.h>
58#include <unistd.h>
59#include <sys/types.h>
60#include <sys/stat.h>
61#include <sys/mman.h>
62#include <fcntl.h>
63#include <errno.h>
64
65QT_BEGIN_NAMESPACE
66
67#ifndef QT_NO_QWS_QPF2
68
69#include "qpfutil.cpp"
70
71QT_BEGIN_INCLUDE_NAMESPACE
72
73#if defined(Q_WS_QWS)
74# include "private/qwscommand_qws_p.h"
75# include "qwsdisplay_qws.h"
76# include "qabstractfontengine_p.h"
77#endif
78#include "qplatformdefs.h"
79QT_END_INCLUDE_NAMESPACE
80
81//#define DEBUG_HEADER
82//#define DEBUG_FONTENGINE
83
84#if defined(DEBUG_HEADER)
85# define DEBUG_VERIFY qDebug
86#else
87# define DEBUG_VERIFY if (0) qDebug
88#endif
89
90#define READ_VERIFY(type, variable) \
91 if (tagPtr + sizeof(type) > endPtr) { \
92 DEBUG_VERIFY() << "read verify failed in line" << __LINE__; \
93 return 0; \
94 } \
95 variable = qFromBigEndian<type>(tagPtr); \
96 DEBUG_VERIFY() << "read value" << variable << "of type " #type; \
97 tagPtr += sizeof(type)
98
99template <typename T>
100T readValue(const uchar *&data)
101{
102 T value = qFromBigEndian<T>(data);
103 data += sizeof(T);
104 return value;
105}
106
107#define VERIFY(condition) \
108 if (!(condition)) { \
109 DEBUG_VERIFY() << "condition " #condition " failed in line" << __LINE__; \
110 return 0; \
111 }
112
113#define VERIFY_TAG(condition) \
114 if (!(condition)) { \
115 DEBUG_VERIFY() << "verifying tag condition " #condition " failed in line" << __LINE__ << "with tag" << tag; \
116 return 0; \
117 }
118
119static inline const uchar *verifyTag(const uchar *tagPtr, const uchar *endPtr)
120{
121 quint16 tag, length;
122 READ_VERIFY(quint16, tag);
123 READ_VERIFY(quint16, length);
124 if (tag == QFontEngineQPF::Tag_EndOfHeader)
125 return endPtr;
126 if (tag < QFontEngineQPF::NumTags) {
127 switch (tagTypes[tag]) {
128 case QFontEngineQPF::BitFieldType:
129 case QFontEngineQPF::StringType:
130 // can't do anything...
131 break;
132 case QFontEngineQPF::UInt32Type:
133 VERIFY_TAG(length == sizeof(quint32));
134 break;
135 case QFontEngineQPF::FixedType:
136 VERIFY_TAG(length == sizeof(quint32));
137 break;
138 case QFontEngineQPF::UInt8Type:
139 VERIFY_TAG(length == sizeof(quint8));
140 break;
141 }
142#if defined(DEBUG_HEADER)
143 if (length == 1)
144 qDebug() << "tag data" << hex << *tagPtr;
145 else if (length == 4)
146 qDebug() << "tag data" << hex << tagPtr[0] << tagPtr[1] << tagPtr[2] << tagPtr[3];
147#endif
148 }
149 return tagPtr + length;
150}
151
152const QFontEngineQPF::Glyph *QFontEngineQPF::findGlyph(glyph_t g) const
153{
154 if (!g || g >= glyphMapEntries)
155 return 0;
156 const quint32 *gmapPtr = reinterpret_cast<const quint32 *>(fontData + glyphMapOffset);
157 quint32 glyphPos = qFromBigEndian<quint32>(gmapPtr[g]);
158 if (glyphPos > glyphDataSize) {
159 if (glyphPos == 0xffffffff)
160 return 0;
161#if defined(DEBUG_FONTENGINE)
162 qDebug() << "glyph" << g << "outside of glyphData, remapping font file";
163#endif
164#if !defined(QT_NO_FREETYPE) && !defined(QT_FONTS_ARE_RESOURCES)
165 const_cast<QFontEngineQPF *>(this)->remapFontData();
166#endif
167 if (glyphPos > glyphDataSize)
168 return 0;
169 }
170 return reinterpret_cast<const Glyph *>(fontData + glyphDataOffset + glyphPos);
171}
172
173bool QFontEngineQPF::verifyHeader(const uchar *data, int size)
174{
175 VERIFY(size >= int(sizeof(Header)));
176 const Header *header = reinterpret_cast<const Header *>(data);
177 if (header->magic[0] != 'Q'
178 || header->magic[1] != 'P'
179 || header->magic[2] != 'F'
180 || header->magic[3] != '2')
181 return false;
182
183 VERIFY(header->majorVersion <= CurrentMajorVersion);
184 const quint16 dataSize = qFromBigEndian<quint16>(header->dataSize);
185 VERIFY(size >= int(sizeof(Header)) + dataSize);
186
187 const uchar *tagPtr = data + sizeof(Header);
188 const uchar *tagEndPtr = tagPtr + dataSize;
189 while (tagPtr < tagEndPtr - 3) {
190 tagPtr = verifyTag(tagPtr, tagEndPtr);
191 VERIFY(tagPtr);
192 }
193
194 VERIFY(tagPtr <= tagEndPtr);
195 return true;
196}
197
198QVariant QFontEngineQPF::extractHeaderField(const uchar *data, HeaderTag requestedTag)
199{
200 const Header *header = reinterpret_cast<const Header *>(data);
201 const uchar *tagPtr = data + sizeof(Header);
202 const uchar *endPtr = tagPtr + qFromBigEndian<quint16>(header->dataSize);
203 while (tagPtr < endPtr - 3) {
204 quint16 tag = readValue<quint16>(tagPtr);
205 quint16 length = readValue<quint16>(tagPtr);
206 if (tag == requestedTag) {
207 switch (tagTypes[requestedTag]) {
208 case StringType:
209 return QVariant(QString::fromUtf8(reinterpret_cast<const char *>(tagPtr), length));
210 case UInt32Type:
211 return QVariant(readValue<quint32>(tagPtr));
212 case UInt8Type:
213 return QVariant(uint(*tagPtr));
214 case FixedType:
215 return QVariant(QFixed::fromFixed(readValue<quint32>(tagPtr)).toReal());
216 case BitFieldType:
217 return QVariant(QByteArray(reinterpret_cast<const char *>(tagPtr), length));
218 }
219 return QVariant();
220 } else if (tag == Tag_EndOfHeader) {
221 break;
222 }
223 tagPtr += length;
224 }
225
226 return QVariant();
227}
228
229#endif // QT_NO_QWS_QPF2
230
231QString qws_fontCacheDir()
232{
233 QString dir;
234#if defined(Q_WS_QWS)
235 extern QString qws_dataDir();
236 dir = qws_dataDir();
237#else
238 dir = QDir::tempPath();
239#endif
240 dir.append(QLatin1String("/fonts/"));
241 QDir qd(dir);
242 if (!qd.exists() && !qd.mkpath(dir))
243 dir = QDir::tempPath();
244 return dir;
245}
246
247#ifndef QT_NO_QWS_QPF2
248
249#ifndef QT_FONTS_ARE_RESOURCES
250QList<QByteArray> QFontEngineQPF::cleanUpAfterClientCrash(const QList<int> &crashedClientIds)
251{
252 QList<QByteArray> removedFonts;
253 QDir dir(qws_fontCacheDir(), QLatin1String("*.qsf"));
254 for (int i = 0; i < int(dir.count()); ++i) {
255 const QByteArray fileName = QFile::encodeName(dir.absoluteFilePath(dir[i]));
256
257 int fd = QT_OPEN(fileName.constData(), O_RDONLY, 0);
258 if (fd >= 0) {
259 void *header = ::mmap(0, sizeof(QFontEngineQPF::Header), PROT_READ, MAP_SHARED, fd, 0);
260 if (header && header != MAP_FAILED) {
261 quint32 lockValue = reinterpret_cast<QFontEngineQPF::Header *>(header)->lock;
262
263 if (lockValue && crashedClientIds.contains(lockValue)) {
264 removedFonts.append(fileName);
265 QFile::remove(QFile::decodeName(fileName));
266 }
267
268 ::munmap(header, sizeof(QFontEngineQPF::Header));
269 }
270 QT_CLOSE(fd);
271 }
272 }
273 if (!removedFonts.isEmpty())
274 qDebug() << "list of corrupted and removed fonts:" << removedFonts;
275 return removedFonts;
276}
277#endif
278
279static inline unsigned int getChar(const QChar *str, int &i, const int len)
280{
281 unsigned int uc = str[i].unicode();
282 if (uc >= 0xd800 && uc < 0xdc00 && i < len-1) {
283 uint low = str[i+1].unicode();
284 if (low >= 0xdc00 && low < 0xe000) {
285 uc = (uc - 0xd800)*0x400 + (low - 0xdc00) + 0x10000;
286 ++i;
287 }
288 }
289 return uc;
290}
291#ifdef QT_FONTS_ARE_RESOURCES
292QFontEngineQPF::QFontEngineQPF(const QFontDef &def, const uchar *bytes, int size)
293 : fd(-1), fontData(bytes), dataSize(size), renderingFontEngine(0)
294#else
295QFontEngineQPF::QFontEngineQPF(const QFontDef &def, int fileDescriptor, QFontEngine *fontEngine)
296 : fd(fileDescriptor), fontData(0), dataSize(0), renderingFontEngine(fontEngine)
297#endif
298{
299 fontDef = def;
300 cache_cost = 100;
301 freetype = 0;
302 externalCMap = 0;
303 cmapOffset = 0;
304 cmapSize = 0;
305 glyphMapOffset = 0;
306 glyphMapEntries = 0;
307 glyphDataOffset = 0;
308 glyphDataSize = 0;
309 kerning_pairs_loaded = false;
310 readOnly = true;
311
312#if defined(DEBUG_FONTENGINE)
313 qDebug() << "QFontEngineQPF::QFontEngineQPF( fd =" << fd << ", renderingFontEngine =" << renderingFontEngine << ')';
314#endif
315
316#ifndef QT_FONTS_ARE_RESOURCES
317 if (fd < 0) {
318 if (!renderingFontEngine)
319 return;
320
321 fileName = fontDef.family.toLower() + QLatin1Char('_')
322 + QString::number(fontDef.pixelSize)
323 + QLatin1Char('_') + QString::number(fontDef.weight)
324 + (fontDef.style != QFont::StyleNormal ?
325 QLatin1String("_italic") : QLatin1String(""))
326 + QLatin1String(".qsf");
327 fileName.replace(QLatin1Char(' '), QLatin1Char('_'));
328 fileName.prepend(qws_fontCacheDir());
329
330 encodedFileName = QFile::encodeName(fileName);
331 if (::access(encodedFileName, F_OK) == 0) {
332#if defined(DEBUG_FONTENGINE)
333 qDebug() << "found existing qpf:" << fileName;
334#endif
335 if (::access(encodedFileName, W_OK | R_OK) == 0) {
336 fd = QT_OPEN(encodedFileName, O_RDWR);
337 }
338 // read-write access failed - try read-only access
339 if (fd == -1 && ::access(encodedFileName, R_OK) == 0) {
340 fd = QT_OPEN(encodedFileName, O_RDONLY);
341 if (fd == -1) {
342#if defined(DEBUG_FONTENGINE)
343 qErrnoWarning("QFontEngineQPF: unable to open %s", encodedName.constData());
344#endif
345 return;
346 }
347 }
348 if (fd == -1) {
349#if defined(DEBUG_FONTENGINE)
350 qWarning("QFontEngineQPF: insufficient access rights to %s", encodedName.constData());
351#endif
352 return;
353 }
354 } else {
355#if defined(DEBUG_FONTENGINE)
356 qDebug() << "creating qpf on the fly:" << fileName;
357#endif
358 if (::access(QFile::encodeName(qws_fontCacheDir()), W_OK) == 0) {
359 fd = QT_OPEN(encodedFileName, O_RDWR | O_EXCL | O_CREAT, 0644);
360 if (fd == -1) {
361#if defined(DEBUG_FONTENGINE)
362 qErrnoWarning(errno, "QFontEngineQPF: open() failed for %s", encodedName.constData());
363#endif
364 return;
365 }
366
367 QBuffer buffer;
368 buffer.open(QIODevice::ReadWrite);
369 QPFGenerator generator(&buffer, renderingFontEngine);
370 generator.generate();
371 buffer.close();
372 const QByteArray &data = buffer.data();
373 if (QT_WRITE(fd, data.constData(), data.size()) == -1) {
374#if defined(DEBUG_FONTENGINE)
375 qErrnoWarning(errno, "QFontEngineQPF: write() failed for %s", encodedName.constData());
376#endif
377 return;
378 }
379 } else {
380#if defined(DEBUG_FONTENGINE)
381 qErrnoWarning(errno, "QFontEngineQPF: access() failed for %s", qPrintable(qws_fontCacheDir()));
382#endif
383 return;
384 }
385 }
386 }
387
388 QT_STATBUF st;
389 if (QT_FSTAT(fd, &st)) {
390#if defined(DEBUG_FONTENGINE)
391 qErrnoWarning(errno, "QFontEngineQPF: fstat failed!");
392#endif
393 return;
394 }
395 dataSize = st.st_size;
396
397
398 fontData = (const uchar *)::mmap(0, st.st_size, PROT_READ | (renderingFontEngine ? PROT_WRITE : 0), MAP_SHARED, fd, 0);
399 if (!fontData || fontData == (const uchar *)MAP_FAILED) {
400#if defined(DEBUG_FONTENGINE)
401 perror("mmap failed");
402#endif
403 fontData = 0;
404 return;
405 }
406#endif //QT_FONTS_ARE_RESOURCES
407
408 if (!verifyHeader(fontData, dataSize)) {
409#if defined(DEBUG_FONTENGINE)
410 qDebug() << "verifyHeader failed!";
411#endif
412 return;
413 }
414
415 const Header *header = reinterpret_cast<const Header *>(fontData);
416
417 readOnly = (header->lock == 0xffffffff);
418
419 const uchar *data = fontData + sizeof(Header) + qFromBigEndian<quint16>(header->dataSize);
420 const uchar *endPtr = fontData + dataSize;
421 while (data <= endPtr - 8) {
422 quint16 blockTag = readValue<quint16>(data);
423 data += 2; // skip padding
424 quint32 blockSize = readValue<quint32>(data);
425
426 if (blockTag == CMapBlock) {
427 cmapOffset = data - fontData;
428 cmapSize = blockSize;
429 } else if (blockTag == GMapBlock) {
430 glyphMapOffset = data - fontData;
431 glyphMapEntries = blockSize / 4;
432 } else if (blockTag == GlyphBlock) {
433 glyphDataOffset = data - fontData;
434 glyphDataSize = blockSize;
435 }
436
437 data += blockSize;
438 }
439
440 face_id.filename = QFile::encodeName(extractHeaderField(fontData, Tag_FileName).toString());
441 face_id.index = extractHeaderField(fontData, Tag_FileIndex).toInt();
442#if !defined(QT_NO_FREETYPE) && !defined(QT_FONTS_ARE_RESOURCES)
443 freetype = QFreetypeFace::getFace(face_id);
444 if (!freetype) {
445 QString newPath =
446#ifndef QT_NO_SETTINGS
447 QLibraryInfo::location(QLibraryInfo::LibrariesPath) +
448#endif
449 QLatin1String("/fonts/") +
450 QFileInfo(QFile::decodeName(face_id.filename)).fileName();
451 face_id.filename = QFile::encodeName(newPath);
452 freetype = QFreetypeFace::getFace(face_id);
453 }
454 if (freetype) {
455 const quint32 qpfTtfRevision = extractHeaderField(fontData, Tag_FontRevision).toUInt();
456 uchar data[4];
457 uint length = 4;
458 bool ok = freetype->getSfntTable(MAKE_TAG('h', 'e', 'a', 'd'), data, &length);
459 if (!ok || length != 4
460 || qFromBigEndian<quint32>(data) != qpfTtfRevision) {
461 freetype->release(face_id);
462 freetype = 0;
463 }
464 }
465 if (!cmapOffset && freetype) {
466 freetypeCMapTable = getSfntTable(MAKE_TAG('c', 'm', 'a', 'p'));
467 externalCMap = reinterpret_cast<const uchar *>(freetypeCMapTable.constData());
468 cmapSize = freetypeCMapTable.size();
469 }
470#endif
471
472 // get the real cmap
473 if (cmapOffset) {
474 int tableSize = cmapSize;
475 const uchar *cmapPtr = getCMap(fontData + cmapOffset, tableSize, &symbol, &cmapSize);
476 if (cmapPtr)
477 cmapOffset = cmapPtr - fontData;
478 else
479 cmapOffset = 0;
480 } else if (externalCMap) {
481 int tableSize = cmapSize;
482 externalCMap = getCMap(externalCMap, tableSize, &symbol, &cmapSize);
483 }
484
485 // verify all the positions in the glyphMap
486 if (glyphMapOffset) {
487 const quint32 *gmapPtr = reinterpret_cast<const quint32 *>(fontData + glyphMapOffset);
488 for (uint i = 0; i < glyphMapEntries; ++i) {
489 quint32 glyphDataPos = qFromBigEndian<quint32>(gmapPtr[i]);
490 if (glyphDataPos == 0xffffffff)
491 continue;
492 if (glyphDataPos >= glyphDataSize) {
493 // error
494 glyphMapOffset = 0;
495 glyphMapEntries = 0;
496 break;
497 }
498 }
499 }
500
501#if defined(DEBUG_FONTENGINE)
502 if (!isValid())
503 qDebug() << "fontData" << fontData << "dataSize" << dataSize
504 << "externalCMap" << externalCMap << "cmapOffset" << cmapOffset
505 << "glyphMapOffset" << glyphMapOffset << "glyphDataOffset" << glyphDataOffset
506 << "fd" << fd << "glyphDataSize" << glyphDataSize;
507#endif
508#if defined(Q_WS_QWS)
509 if (isValid() && renderingFontEngine)
510 qt_fbdpy->sendFontCommand(QWSFontCommand::StartedUsingFont, encodedFileName);
511#endif
512}
513
514QFontEngineQPF::~QFontEngineQPF()
515{
516#if defined(Q_WS_QWS)
517 if (isValid() && renderingFontEngine) {
518 QT_TRY {
519 qt_fbdpy->sendFontCommand(QWSFontCommand::StoppedUsingFont, encodedFileName);
520 } QT_CATCH(...) {
521 qDebug("QFontEngineQPF::~QFontEngineQPF: Out of memory");
522 // ignore.
523 }
524 }
525#endif
526 delete renderingFontEngine;
527 if (fontData) {
528 if (munmap((void *)fontData, dataSize) == -1) {
529#if defined(DEBUG_FONTENGINE)
530 qErrnoWarning(errno, "~QFontEngineQPF: Unable to munmap");
531#endif
532 }
533 }
534 if (fd != -1)
535 ::close(fd);
536#if !defined(QT_NO_FREETYPE)
537 if (freetype)
538 freetype->release(face_id);
539#endif
540}
541
542bool QFontEngineQPF::getSfntTableData(uint tag, uchar *buffer, uint *length) const
543{
544#if !defined(QT_NO_FREETYPE)
545 if (freetype)
546 return freetype->getSfntTable(tag, buffer, length);
547#endif
548 Q_UNUSED(tag);
549 Q_UNUSED(buffer);
550 *length = 0;
551 return false;
552}
553
554bool QFontEngineQPF::stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs, QTextEngine::ShaperFlags flags) const
555{
556 if (!externalCMap && !cmapOffset && renderingFontEngine) {
557 if (!renderingFontEngine->stringToCMap(str, len, glyphs, nglyphs, flags))
558 return false;
559#ifndef QT_NO_FREETYPE
560 const_cast<QFontEngineQPF *>(this)->ensureGlyphsLoaded(*glyphs);
561#endif
562 return true;
563 }
564
565 if (*nglyphs < len) {
566 *nglyphs = len;
567 return false;
568 }
569
570#if defined(DEBUG_FONTENGINE)
571 QSet<QChar> seenGlyphs;
572#endif
573
574 const uchar *cmap = externalCMap ? externalCMap : (fontData + cmapOffset);
575
576 bool mirrored = flags & QTextEngine::RightToLeft;
577 int glyph_pos = 0;
578 if (symbol) {
579 for (int i = 0; i < len; ++i) {
580 unsigned int uc = getChar(str, i, len);
581 glyphs->glyphs[glyph_pos] = getTrueTypeGlyphIndex(cmap, uc);
582 if(!glyphs->glyphs[glyph_pos] && uc < 0x100)
583 glyphs->glyphs[glyph_pos] = getTrueTypeGlyphIndex(cmap, uc + 0xf000);
584 ++glyph_pos;
585 }
586 } else {
587 for (int i = 0; i < len; ++i) {
588 unsigned int uc = getChar(str, i, len);
589 if (mirrored)
590 uc = QChar::mirroredChar(uc);
591 glyphs->glyphs[glyph_pos] = getTrueTypeGlyphIndex(cmap, uc);
592#if 0 && defined(DEBUG_FONTENGINE)
593 QChar c(uc);
594 if (!findGlyph(glyphs[glyph_pos].glyph) && !seenGlyphs.contains(c))
595 qDebug() << "glyph for character" << c << '/' << hex << uc << "is" << dec << glyphs[glyph_pos].glyph;
596
597 seenGlyphs.insert(c);
598#endif
599 ++glyph_pos;
600 }
601 }
602
603 *nglyphs = glyph_pos;
604 glyphs->numGlyphs = glyph_pos;
605 recalcAdvances(glyphs, flags);
606 return true;
607}
608
609void QFontEngineQPF::recalcAdvances(QGlyphLayout *glyphs, QTextEngine::ShaperFlags) const
610{
611#ifndef QT_NO_FREETYPE
612 const_cast<QFontEngineQPF *>(this)->ensureGlyphsLoaded(*glyphs);
613#endif
614 for (int i = 0; i < glyphs->numGlyphs; ++i) {
615 const Glyph *g = findGlyph(glyphs->glyphs[i]);
616 if (!g) {
617 glyphs->glyphs[i] = 0;
618 continue;
619 }
620 glyphs->advances_x[i] = g->advance;
621 glyphs->advances_y[i] = 0;
622 }
623}
624
625QImage QFontEngineQPF::alphaMapForGlyph(glyph_t g)
626{
627 const Glyph *glyph = findGlyph(g);
628 if (!glyph)
629 return QImage();
630
631 const uchar *bits = ((const uchar *) glyph) + sizeof(Glyph);
632
633 QImage image(glyph->width, glyph->height, QImage::Format_Indexed8);
634 for (int j=0; j<256; ++j)
635 image.setColor(j, qRgba(0, 0, 0, j));
636
637 for (int i=0; i<glyph->height; ++i) {
638 memcpy(image.scanLine(i), bits, glyph->bytesPerLine);
639 bits += glyph->bytesPerLine;
640 }
641 return image;
642}
643
644void QFontEngineQPF::draw(QPaintEngine *p, qreal _x, qreal _y, const QTextItemInt &si)
645{
646 QPaintEngineState *pState = p->state;
647 QRasterPaintEngine *paintEngine = static_cast<QRasterPaintEngine*>(p);
648
649 QTransform matrix = pState->transform();
650 matrix.translate(_x, _y);
651 QFixed x = QFixed::fromReal(matrix.dx());
652 QFixed y = QFixed::fromReal(matrix.dy());
653
654 QVarLengthArray<QFixedPoint> positions;
655 QVarLengthArray<glyph_t> glyphs;
656 getGlyphPositions(si.glyphs, matrix, si.flags, glyphs, positions);
657 if (glyphs.size() == 0)
658 return;
659
660 for(int i = 0; i < glyphs.size(); i++) {
661 const Glyph *glyph = findGlyph(glyphs[i]);
662 if (!glyph)
663 continue;
664
665 const int depth = 8; //###
666
667 paintEngine->alphaPenBlt(reinterpret_cast<const uchar *>(glyph) + sizeof(Glyph), glyph->bytesPerLine, depth,
668 qRound(positions[i].x) + glyph->x,
669 qRound(positions[i].y) + glyph->y,
670 glyph->width, glyph->height);
671 }
672}
673
674void QFontEngineQPF::addOutlineToPath(qreal x, qreal y, const QGlyphLayout &glyphs, QPainterPath *path, QTextItem::RenderFlags flags)
675{
676 if (renderingFontEngine &&
677 (renderingFontEngine->type() != QFontEngine::Proxy
678 || static_cast<QProxyFontEngine *>(renderingFontEngine)->capabilities() & QAbstractFontEngine::CanOutlineGlyphs)) {
679 renderingFontEngine->addOutlineToPath(x, y, glyphs, path, flags);
680 return;
681 }
682 addBitmapFontToPath(x, y, glyphs, path, flags);
683}
684
685glyph_metrics_t QFontEngineQPF::boundingBox(const QGlyphLayout &glyphs)
686{
687#ifndef QT_NO_FREETYPE
688 const_cast<QFontEngineQPF *>(this)->ensureGlyphsLoaded(glyphs);
689#endif
690
691 glyph_metrics_t overall;
692 // initialize with line height, we get the same behaviour on all platforms
693 overall.y = -ascent();
694 overall.height = ascent() + descent() + 1;
695
696 QFixed ymax = 0;
697 QFixed xmax = 0;
698 for (int i = 0; i < glyphs.numGlyphs; i++) {
699 const Glyph *g = findGlyph(glyphs.glyphs[i]);
700 if (!g)
701 continue;
702
703 QFixed x = overall.xoff + glyphs.offsets[i].x + g->x;
704 QFixed y = overall.yoff + glyphs.offsets[i].y + g->y;
705 overall.x = qMin(overall.x, x);
706 overall.y = qMin(overall.y, y);
707 xmax = qMax(xmax, x + g->width);
708 ymax = qMax(ymax, y + g->height);
709 overall.xoff += g->advance;
710 }
711 overall.height = qMax(overall.height, ymax - overall.y);
712 overall.width = xmax - overall.x;
713
714 return overall;
715}
716
717glyph_metrics_t QFontEngineQPF::boundingBox(glyph_t glyph)
718{
719#ifndef QT_NO_FREETYPE
720 {
721 QGlyphLayoutArray<1> tmp;
722 tmp.glyphs[0] = glyph;
723 const_cast<QFontEngineQPF *>(this)->ensureGlyphsLoaded(tmp);
724 }
725#endif
726 glyph_metrics_t overall;
727 const Glyph *g = findGlyph(glyph);
728 if (!g)
729 return overall;
730 overall.x = g->x;
731 overall.y = g->y;
732 overall.width = g->width;
733 overall.height = g->height;
734 overall.xoff = g->advance;
735 return overall;
736}
737
738QFixed QFontEngineQPF::ascent() const
739{
740 return QFixed::fromReal(extractHeaderField(fontData, Tag_Ascent).value<qreal>());
741}
742
743QFixed QFontEngineQPF::descent() const
744{
745 return QFixed::fromReal(extractHeaderField(fontData, Tag_Descent).value<qreal>());
746}
747
748QFixed QFontEngineQPF::leading() const
749{
750 return QFixed::fromReal(extractHeaderField(fontData, Tag_Leading).value<qreal>());
751}
752
753qreal QFontEngineQPF::maxCharWidth() const
754{
755 return extractHeaderField(fontData, Tag_MaxCharWidth).value<qreal>();
756}
757
758qreal QFontEngineQPF::minLeftBearing() const
759{
760 return extractHeaderField(fontData, Tag_MinLeftBearing).value<qreal>();
761}
762
763qreal QFontEngineQPF::minRightBearing() const
764{
765 return extractHeaderField(fontData, Tag_MinRightBearing).value<qreal>();
766}
767
768QFixed QFontEngineQPF::underlinePosition() const
769{
770 return QFixed::fromReal(extractHeaderField(fontData, Tag_UnderlinePosition).value<qreal>());
771}
772
773QFixed QFontEngineQPF::lineThickness() const
774{
775 return QFixed::fromReal(extractHeaderField(fontData, Tag_LineThickness).value<qreal>());
776}
777
778QFontEngine::Type QFontEngineQPF::type() const
779{
780 return QFontEngine::QPF2;
781}
782
783bool QFontEngineQPF::canRender(const QChar *string, int len)
784{
785 const uchar *cmap = externalCMap ? externalCMap : (fontData + cmapOffset);
786
787 if (symbol) {
788 for (int i = 0; i < len; ++i) {
789 unsigned int uc = getChar(string, i, len);
790 glyph_t g = getTrueTypeGlyphIndex(cmap, uc);
791 if(!g && uc < 0x100)
792 g = getTrueTypeGlyphIndex(cmap, uc + 0xf000);
793 if (!g)
794 return false;
795 }
796 } else {
797 for (int i = 0; i < len; ++i) {
798 unsigned int uc = getChar(string, i, len);
799 if (!getTrueTypeGlyphIndex(cmap, uc))
800 return false;
801 }
802 }
803 return true;
804}
805
806bool QFontEngineQPF::isValid() const
807{
808 return fontData && dataSize && (cmapOffset || externalCMap || renderingFontEngine)
809 && glyphMapOffset && glyphDataOffset && (fd >= 0 || glyphDataSize > 0);
810}
811
812#if !defined(QT_NO_FREETYPE)
813FT_Face QFontEngineQPF::lockFace() const
814{
815 Q_ASSERT(freetype);
816 freetype->lock();
817 FT_Face face = freetype->face;
818
819 // ### not perfect
820 const int ysize = qRound(fontDef.pixelSize * qreal(64));
821 const int xsize = ysize;
822
823 if (freetype->xsize != xsize || freetype->ysize != ysize) {
824 FT_Set_Char_Size(face, xsize, ysize, 0, 0);
825 freetype->xsize = xsize;
826 freetype->ysize = ysize;
827 }
828 FT_Matrix identityMatrix;
829 identityMatrix.xx = 0x10000;
830 identityMatrix.yy = 0x10000;
831 identityMatrix.xy = 0;
832 identityMatrix.yx = 0;
833 if (freetype->matrix.xx != identityMatrix.xx ||
834 freetype->matrix.yy != identityMatrix.yy ||
835 freetype->matrix.xy != identityMatrix.xy ||
836 freetype->matrix.yx != identityMatrix.yx) {
837 freetype->matrix = identityMatrix;
838 FT_Set_Transform(face, &freetype->matrix, 0);
839 }
840 return face;
841}
842
843void QFontEngineQPF::unlockFace() const
844{
845 freetype->unlock();
846}
847
848void QFontEngineQPF::doKerning(QGlyphLayout *g, QTextEngine::ShaperFlags flags) const
849{
850 if (!kerning_pairs_loaded) {
851 kerning_pairs_loaded = true;
852 if (freetype) {
853 lockFace();
854 if (freetype->face->size->metrics.x_ppem != 0) {
855 QFixed scalingFactor(freetype->face->units_per_EM/freetype->face->size->metrics.x_ppem);
856 unlockFace();
857 const_cast<QFontEngineQPF *>(this)->loadKerningPairs(scalingFactor);
858 } else {
859 unlockFace();
860 }
861 }
862 }
863 QFontEngine::doKerning(g, flags);
864}
865
866HB_Error QFontEngineQPF::getPointInOutline(HB_Glyph glyph, int flags, hb_uint32 point, HB_Fixed *xpos, HB_Fixed *ypos, hb_uint32 *nPoints)
867{
868 if (!freetype)
869 return HB_Err_Not_Covered;
870 lockFace();
871 HB_Error result = freetype->getPointInOutline(glyph, flags, point, xpos, ypos, nPoints);
872 unlockFace();
873 return result;
874}
875
876QFixed QFontEngineQPF::emSquareSize() const
877{
878 if (!freetype)
879 return QFontEngine::emSquareSize();
880 if (FT_IS_SCALABLE(freetype->face))
881 return freetype->face->units_per_EM;
882 else
883 return freetype->face->size->metrics.y_ppem;
884}
885
886void QFontEngineQPF::ensureGlyphsLoaded(const QGlyphLayout &glyphs)
887{
888 if (readOnly)
889 return;
890 bool locked = false;
891 for (int i = 0; i < glyphs.numGlyphs; ++i) {
892 if (!glyphs.glyphs[i])
893 continue;
894 const Glyph *g = findGlyph(glyphs.glyphs[i]);
895 if (g)
896 continue;
897 if (!locked) {
898 if (!lockFile())
899 return;
900 locked = true;
901 g = findGlyph(glyphs.glyphs[i]);
902 if (g)
903 continue;
904 }
905 loadGlyph(glyphs.glyphs[i]);
906 }
907 if (locked) {
908 unlockFile();
909#if defined(DEBUG_FONTENGINE)
910 qDebug() << "Finished rendering glyphs\n";
911#endif
912 }
913}
914
915void QFontEngineQPF::loadGlyph(glyph_t glyph)
916{
917 quint32 glyphPos = ~0;
918
919 if (!renderingFontEngine)
920 return;
921 QImage img = renderingFontEngine->alphaMapForGlyph(glyph);
922 if (img.format() != QImage::Format_Indexed8) {
923 bool mono = img.depth() == 1;
924 img = img.convertToFormat(QImage::Format_Indexed8);
925 if (mono) {
926 //### we know that 1 is opaque and 0 is transparent
927 uchar *byte = img.bits();
928 int count = img.byteCount();
929 while (count--)
930 *byte++ *= 0xff;
931 }
932 }
933 glyph_metrics_t metrics = renderingFontEngine->boundingBox(glyph);
934 renderingFontEngine->removeGlyphFromCache(glyph);
935
936 off_t oldSize = ::lseek(fd, 0, SEEK_END);
937 if (oldSize == (off_t)-1)
938 return;
939
940 Glyph g;
941 g.width = img.width();
942 g.height = img.height();
943 g.bytesPerLine = img.bytesPerLine();
944 g.x = qRound(metrics.x);
945 g.y = qRound(metrics.y);
946 g.advance = qRound(metrics.xoff);
947
948 QT_WRITE(fd, &g, sizeof(g));
949 QT_WRITE(fd, img.bits(), img.byteCount());
950
951 glyphPos = oldSize - glyphDataOffset;
952#if 0 && defined(DEBUG_FONTENGINE)
953 qDebug() << "glyphPos for new glyph" << glyph << "is" << glyphPos << "oldSize" << oldSize << "glyphDataOffset" << glyphDataOffset;
954#endif
955
956 quint32 *gmap = (quint32 *)(fontData + glyphMapOffset);
957 gmap[glyph] = qToBigEndian(glyphPos);
958
959 glyphDataSize = glyphPos + sizeof(g) + img.byteCount();
960 quint32 *blockSizePtr = (quint32 *)(fontData + glyphDataOffset - 4);
961 *blockSizePtr = qToBigEndian(glyphDataSize);
962}
963
964bool QFontEngineQPF::lockFile()
965{
966 // #### this does not handle the case when the process holding the
967 // lock hangs for some reason
968 struct flock lock;
969 lock.l_type = F_WRLCK;
970 lock.l_whence = SEEK_SET;
971 lock.l_start = 0;
972 lock.l_len = 0; // lock the whole file
973 while (fcntl(fd, F_SETLKW, &lock) != 0) {
974 if (errno == EINTR)
975 continue;
976 perror("locking qpf");
977 return false;
978 }
979 Header *header = (Header *)fontData;
980 if (header->lock) {
981 lock.l_type = F_UNLCK;
982 if (fcntl(fd, F_SETLK, &lock) != 0)
983 perror("unlocking possibly corrupt qpf");
984 return false;
985 }
986#if defined(Q_WS_QWS)
987 extern int qws_client_id;
988 // qws_client_id == 0 means we're the server. in this case we just
989 // set the id to 1
990 header->lock = qws_client_id ? qws_client_id : 1;
991#else
992 header->lock = 1;
993#endif
994 return true;
995}
996
997void QFontEngineQPF::unlockFile()
998{
999 ((Header *)fontData)->lock = 0;
1000
1001 struct flock lock;
1002 lock.l_type = F_UNLCK;
1003 lock.l_whence = SEEK_SET;
1004 lock.l_start = 0;
1005 lock.l_len = 0; // lock the whole file
1006 if (fcntl(fd, F_SETLK, &lock) != 0) {
1007 perror("unlocking qpf");
1008 }
1009
1010 remapFontData();
1011}
1012
1013void QFontEngineQPF::remapFontData()
1014{
1015 off_t newFileSize = ::lseek(fd, 0, SEEK_END);
1016 if (newFileSize == (off_t)-1) {
1017#ifdef DEBUG_FONTENGINE
1018 perror("QFontEngineQPF::remapFontData: lseek failed");
1019#endif
1020 fontData = 0;
1021 return;
1022 }
1023
1024#ifndef QT_NO_MREMAP
1025 fontData = static_cast<uchar *>(::mremap(const_cast<uchar *>(fontData), dataSize, newFileSize, MREMAP_MAYMOVE));
1026 if (!fontData || fontData == (const uchar *)MAP_FAILED) {
1027# if defined(DEBUG_FONTENGINE)
1028 perror("QFontEngineQPF::remapFontData(): mremap failed");
1029# endif
1030 fontData = 0;
1031 }
1032
1033 if (!fontData)
1034#endif // QT_NO_MREMAP
1035 {
1036 int status = ::munmap((void *)fontData, dataSize);
1037 if (status != 0)
1038 qErrnoWarning(status, "QFontEngineQPF::remapFomrData: munmap failed!");
1039
1040 fontData = (const uchar *)::mmap(0, newFileSize, PROT_READ | (renderingFontEngine ? PROT_WRITE : 0),
1041 MAP_SHARED, fd, 0);
1042 if (!fontData || fontData == (const uchar *)MAP_FAILED) {
1043# if defined(DEBUG_FONTENGINE)
1044 perror("mmap failed");
1045# endif
1046 fontData = 0;
1047 return;
1048 }
1049 }
1050
1051 dataSize = newFileSize;
1052 glyphDataSize = newFileSize - glyphDataOffset;
1053#if defined(DEBUG_FONTENGINE)
1054 qDebug() << "remapped the font file to" << newFileSize << "bytes";
1055#endif
1056}
1057
1058#endif // QT_NO_FREETYPE
1059
1060void QPFGenerator::generate()
1061{
1062 writeHeader();
1063 writeGMap();
1064 writeBlock(QFontEngineQPF::GlyphBlock, QByteArray());
1065
1066 dev->seek(4); // position of header.lock
1067 writeUInt32(0);
1068}
1069
1070void QPFGenerator::writeHeader()
1071{
1072 QFontEngineQPF::Header header;
1073
1074 header.magic[0] = 'Q';
1075 header.magic[1] = 'P';
1076 header.magic[2] = 'F';
1077 header.magic[3] = '2';
1078 header.lock = 1;
1079 header.majorVersion = QFontEngineQPF::CurrentMajorVersion;
1080 header.minorVersion = QFontEngineQPF::CurrentMinorVersion;
1081 header.dataSize = 0;
1082 dev->write((const char *)&header, sizeof(header));
1083
1084 writeTaggedString(QFontEngineQPF::Tag_FontName, fe->fontDef.family.toUtf8());
1085
1086 QFontEngine::FaceId face = fe->faceId();
1087 writeTaggedString(QFontEngineQPF::Tag_FileName, face.filename);
1088 writeTaggedUInt32(QFontEngineQPF::Tag_FileIndex, face.index);
1089
1090 {
1091 uchar data[4];
1092 uint len = 4;
1093 bool ok = fe->getSfntTableData(MAKE_TAG('h', 'e', 'a', 'd'), data, &len);
1094 if (ok) {
1095 const quint32 revision = qFromBigEndian<quint32>(data);
1096 writeTaggedUInt32(QFontEngineQPF::Tag_FontRevision, revision);
1097 }
1098 }
1099
1100 writeTaggedQFixed(QFontEngineQPF::Tag_Ascent, fe->ascent());
1101 writeTaggedQFixed(QFontEngineQPF::Tag_Descent, fe->descent());
1102 writeTaggedQFixed(QFontEngineQPF::Tag_Leading, fe->leading());
1103 writeTaggedQFixed(QFontEngineQPF::Tag_XHeight, fe->xHeight());
1104 writeTaggedQFixed(QFontEngineQPF::Tag_AverageCharWidth, fe->averageCharWidth());
1105 writeTaggedQFixed(QFontEngineQPF::Tag_MaxCharWidth, QFixed::fromReal(fe->maxCharWidth()));
1106 writeTaggedQFixed(QFontEngineQPF::Tag_LineThickness, fe->lineThickness());
1107 writeTaggedQFixed(QFontEngineQPF::Tag_MinLeftBearing, QFixed::fromReal(fe->minLeftBearing()));
1108 writeTaggedQFixed(QFontEngineQPF::Tag_MinRightBearing, QFixed::fromReal(fe->minRightBearing()));
1109 writeTaggedQFixed(QFontEngineQPF::Tag_UnderlinePosition, fe->underlinePosition());
1110 writeTaggedUInt8(QFontEngineQPF::Tag_PixelSize, fe->fontDef.pixelSize);
1111 writeTaggedUInt8(QFontEngineQPF::Tag_Weight, fe->fontDef.weight);
1112 writeTaggedUInt8(QFontEngineQPF::Tag_Style, fe->fontDef.style);
1113
1114 writeTaggedUInt8(QFontEngineQPF::Tag_GlyphFormat, QFontEngineQPF::AlphamapGlyphs);
1115
1116 writeTaggedString(QFontEngineQPF::Tag_EndOfHeader, QByteArray());
1117 align4();
1118
1119 const quint64 size = dev->pos();
1120 header.dataSize = qToBigEndian<quint16>(size - sizeof(header));
1121 dev->seek(0);
1122 dev->write((const char *)&header, sizeof(header));
1123 dev->seek(size);
1124}
1125
1126void QPFGenerator::writeGMap()
1127{
1128 const quint16 glyphCount = fe->glyphCount();
1129
1130 writeUInt16(QFontEngineQPF::GMapBlock);
1131 writeUInt16(0); // padding
1132 writeUInt32(glyphCount * 4);
1133
1134 QByteArray &buffer = dev->buffer();
1135 const int numBytes = glyphCount * sizeof(quint32);
1136 qint64 pos = buffer.size();
1137 buffer.resize(pos + numBytes);
1138 qMemSet(buffer.data() + pos, 0xff, numBytes);
1139 dev->seek(pos + numBytes);
1140}
1141
1142void QPFGenerator::writeBlock(QFontEngineQPF::BlockTag tag, const QByteArray &data)
1143{
1144 writeUInt16(tag);
1145 writeUInt16(0); // padding
1146 const int padSize = ((data.size() + 3) / 4) * 4 - data.size();
1147 writeUInt32(data.size() + padSize);
1148 dev->write(data);
1149 for (int i = 0; i < padSize; ++i)
1150 writeUInt8(0);
1151}
1152
1153void QPFGenerator::writeTaggedString(QFontEngineQPF::HeaderTag tag, const QByteArray &string)
1154{
1155 writeUInt16(tag);
1156 writeUInt16(string.length());
1157 dev->write(string);
1158}
1159
1160void QPFGenerator::writeTaggedUInt32(QFontEngineQPF::HeaderTag tag, quint32 value)
1161{
1162 writeUInt16(tag);
1163 writeUInt16(sizeof(value));
1164 writeUInt32(value);
1165}
1166
1167void QPFGenerator::writeTaggedUInt8(QFontEngineQPF::HeaderTag tag, quint8 value)
1168{
1169 writeUInt16(tag);
1170 writeUInt16(sizeof(value));
1171 writeUInt8(value);
1172}
1173
1174void QPFGenerator::writeTaggedQFixed(QFontEngineQPF::HeaderTag tag, QFixed value)
1175{
1176 writeUInt16(tag);
1177 writeUInt16(sizeof(quint32));
1178 writeUInt32(value.value());
1179}
1180
1181#endif // QT_NO_QWS_QPF2
1182
1183/*
1184 Creates a new multi qws engine.
1185
1186 This function takes ownership of the QFontEngine, increasing it's refcount.
1187*/
1188QFontEngineMultiQWS::QFontEngineMultiQWS(QFontEngine *fe, int _script, const QStringList &fallbacks)
1189 : QFontEngineMulti(fallbacks.size() + 1),
1190 fallbackFamilies(fallbacks), script(_script)
1191{
1192 engines[0] = fe;
1193 fe->ref.ref();
1194 fontDef = engines[0]->fontDef;
1195}
1196
1197void QFontEngineMultiQWS::loadEngine(int at)
1198{
1199 Q_ASSERT(at < engines.size());
1200 Q_ASSERT(engines.at(at) == 0);
1201
1202 QFontDef request = fontDef;
1203 request.styleStrategy |= QFont::NoFontMerging;
1204 request.family = fallbackFamilies.at(at-1);
1205 engines[at] = QFontDatabase::findFont(script,
1206 /*fontprivate*/0,
1207 request);
1208 Q_ASSERT(engines[at]);
1209 engines[at]->ref.ref();
1210 engines[at]->fontDef = request;
1211}
1212
1213void QFontEngineMultiQWS::draw(QPaintEngine */*p*/, qreal /*x*/, qreal /*y*/, const QTextItemInt &/*si*/)
1214{
1215 qFatal("QFontEngineMultiQWS::draw should never be called!");
1216}
1217
1218QT_END_NAMESPACE
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