FCL/sf/mw/qt: comparison src/gui/text/qfont.cpp

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+:1918ee327afb
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#include "qfont.h"
+#include "qdebug.h"
+#include "qpaintdevice.h"
+#include "qfontdatabase.h"
+#include "qfontmetrics.h"
+#include "qfontinfo.h"
+#include "qpainter.h"
+#include "qhash.h"
+#include "qdatastream.h"
+#include "qapplication.h"
+#include "qstringlist.h"
+#include "qthread.h"
+#include "qthreadstorage.h"
+#include <private/qunicodetables_p.h>
+#include "qfont_p.h"
+#include <private/qfontengine_p.h>
+#include <private/qpainter_p.h>
+#include <private/qtextengine_p.h>
+#include <limits.h>
+#ifdef Q_WS_X11
+#include "qx11info_x11.h"
+#include <private/qt_x11_p.h>
+#endif
+#ifdef Q_WS_QWS
+#include "qscreen_qws.h"
+#if !defined(QT_NO_QWS_QPF2)
+#include <qfile.h>
+#include "qfontengine_qpf_p.h"
+#endif
+#endif
+#ifdef Q_OS_SYMBIAN
+#include "qt_s60_p.h"
+#endif
+#include <QMutexLocker>
+// #define QFONTCACHE_DEBUG
+#ifdef QFONTCACHE_DEBUG
+#  define FC_DEBUG qDebug
+#else
+#  define FC_DEBUG if (false) qDebug
+#endif
+QT_BEGIN_NAMESPACE
+#ifdef Q_WS_WIN
+extern HDC shared_dc();
+#endif
+#ifdef Q_WS_X11
+extern const QX11Info *qt_x11Info(const QPaintDevice *pd);
+#endif
+bool QFontDef::exactMatch(const QFontDef &other) const
+{
+/*
+QFontDef comparison is more complicated than just simple
+per-member comparisons.
+When comparing point/pixel sizes, either point or pixelsize
+could be -1.  in This case we have to compare the non negative
+size value.
+This test will fail if the point-sizes differ by 1/2 point or
+more or they do not round to the same value.  We have to do this
+since our API still uses 'int' point-sizes in the API, but store
+deci-point-sizes internally.
+To compare the family members, we need to parse the font names
+and compare the family/foundry strings separately.  This allows
+us to compare e.g. "Helvetica" and "Helvetica [Adobe]" with
+positive results.
+*/
+if (pixelSize != -1 && other.pixelSize != -1) {
+if (pixelSize != other.pixelSize)
+return false;
+} else if (pointSize != -1 && other.pointSize != -1) {
+if (pointSize != other.pointSize)
+return false;
+} else {
+return false;
+}
+if (!ignorePitch && !other.ignorePitch && fixedPitch != other.fixedPitch)
+return false;
+if (stretch != 0 && other.stretch != 0 && stretch != other.stretch)
+return false;
+QString this_family, this_foundry, other_family, other_foundry;
+QFontDatabase::parseFontName(family, this_foundry, this_family);
+QFontDatabase::parseFontName(other.family, other_foundry, other_family);
+return (styleHint     == other.styleHint
+&& styleStrategy == other.styleStrategy
+&& weight        == other.weight
+&& style        == other.style
+&& this_family   == other_family
+&& (this_foundry.isEmpty()
+|| other_foundry.isEmpty()
+|| this_foundry == other_foundry)
+#ifdef Q_WS_X11
+&& addStyle == other.addStyle
+#endif // Q_WS_X11
+);
+}
+extern bool qt_is_gui_used;
+Q_GUI_EXPORT int qt_defaultDpiX()
+{
+if (!qt_is_gui_used)
+return 75;
+int dpi;
+#ifdef Q_WS_X11
+dpi = QX11Info::appDpiX();
+#elif defined(Q_WS_WIN)
+dpi = GetDeviceCaps(shared_dc(),LOGPIXELSX);
+#elif defined(Q_WS_MAC)
+extern float qt_mac_defaultDpi_x(); //qpaintdevice_mac.cpp
+dpi = qt_mac_defaultDpi_x();
+#elif defined(Q_WS_QWS)
+if (!qt_screen)
+return 72;
+QScreen *screen = qt_screen;
+const QList<QScreen*> subScreens = qt_screen->subScreens();
+if (!subScreens.isEmpty())
+screen = subScreens.at(0);
+dpi = qRound(screen->width() / (screen->physicalWidth() / qreal(25.4)));
+#elif defined(Q_OS_SYMBIAN)
+dpi = S60->defaultDpiX;
+#endif // Q_WS_X11
+return dpi;
+}
+Q_GUI_EXPORT int qt_defaultDpiY()
+{
+if (!qt_is_gui_used)
+return 75;
+int dpi;
+#ifdef Q_WS_X11
+dpi = QX11Info::appDpiY();
+#elif defined(Q_WS_WIN)
+dpi = GetDeviceCaps(shared_dc(),LOGPIXELSY);
+#elif defined(Q_WS_MAC)
+extern float qt_mac_defaultDpi_y(); //qpaintdevice_mac.cpp
+dpi = qt_mac_defaultDpi_y();
+#elif defined(Q_WS_QWS)
+if (!qt_screen)
+return 72;
+QScreen *screen = qt_screen;
+const QList<QScreen*> subScreens = qt_screen->subScreens();
+if (!subScreens.isEmpty())
+screen = subScreens.at(0);
+dpi = qRound(screen->height() / (screen->physicalHeight() / qreal(25.4)));
+#elif defined(Q_OS_SYMBIAN)
+dpi = S60->defaultDpiY;
+#endif // Q_WS_X11
+return dpi;
+}
+Q_GUI_EXPORT int qt_defaultDpi()
+{
+return qt_defaultDpiY();
+}
+QFontPrivate::QFontPrivate()
+: engineData(0), dpi(qt_defaultDpi()), screen(0),
+rawMode(false), underline(false), overline(false), strikeOut(false), kerning(true),
+capital(0), letterSpacingIsAbsolute(false), scFont(0)
+{
+#ifdef Q_WS_X11
+if (QX11Info::display())
+screen = QX11Info::appScreen();
+else
+screen = 0;
+#endif
+#ifdef Q_WS_WIN
+hdc = 0;
+#endif
+}
+QFontPrivate::QFontPrivate(const QFontPrivate &other)
+: request(other.request), engineData(0), dpi(other.dpi), screen(other.screen),
+rawMode(other.rawMode), underline(other.underline), overline(other.overline),
+strikeOut(other.strikeOut), kerning(other.kerning),
+capital(other.capital), letterSpacingIsAbsolute(other.letterSpacingIsAbsolute),
+letterSpacing(other.letterSpacing), wordSpacing(other.wordSpacing),
+scFont(other.scFont)
+{
+#ifdef Q_WS_WIN
+hdc = other.hdc;
+#endif
+if (scFont && scFont != this)
+scFont->ref.ref();
+}
+QFontPrivate::~QFontPrivate()
+{
+if (engineData)
+engineData->ref.deref();
+engineData = 0;
+if (scFont && scFont != this)
+scFont->ref.deref();
+scFont = 0;
+}
+#if !defined(Q_WS_MAC)
+extern QMutex *qt_fontdatabase_mutex();
+QFontEngine *QFontPrivate::engineForScript(int script) const
+{
+QMutexLocker locker(qt_fontdatabase_mutex());
+if (script >= QUnicodeTables::Inherited)
+script = QUnicodeTables::Common;
+if (engineData && engineData->fontCache != QFontCache::instance()) {
+// throw out engineData that came from a different thread
+engineData->ref.deref();
+engineData = 0;
+}
+if (!engineData || !engineData->engines[script])
+QFontDatabase::load(this, script);
+return engineData->engines[script];
+}
+#else
+QFontEngine *QFontPrivate::engineForScript(int script) const
+{
+extern QMutex *qt_fontdatabase_mutex();
+QMutexLocker locker(qt_fontdatabase_mutex());
+if (script >= QUnicodeTables::Inherited)
+script = QUnicodeTables::Common;
+if (engineData && engineData->fontCache != QFontCache::instance()) {
+// throw out engineData that came from a different thread
+engineData->ref.deref();
+engineData = 0;
+}
+if (!engineData || !engineData->engine)
+QFontDatabase::load(this, script);
+return engineData->engine;
+}
+#endif
+void QFontPrivate::alterCharForCapitalization(QChar &c) const {
+switch (capital) {
+case QFont::AllUppercase:
+case QFont::SmallCaps:
+c = c.toUpper();
+break;
+case QFont::AllLowercase:
+c = c.toLower();
+break;
+case QFont::MixedCase:
+break;
+}
+}
+QFontPrivate *QFontPrivate::smallCapsFontPrivate() const
+{
+if (scFont)
+return scFont;
+QFont font(const_cast<QFontPrivate *>(this));
+qreal pointSize = font.pointSizeF();
+if (pointSize > 0)
+font.setPointSizeF(pointSize * .7);
+else
+font.setPixelSize((font.pixelSize() * 7 + 5) / 10);
+scFont = font.d.data();
+if (scFont != this)
+scFont->ref.ref();
+return scFont;
+}
+void QFontPrivate::resolve(uint mask, const QFontPrivate *other)
+{
+Q_ASSERT(other != 0);
+dpi = other->dpi;
+if ((mask & QFont::AllPropertiesResolved) == QFont::AllPropertiesResolved) return;
+// assign the unset-bits with the set-bits of the other font def
+if (! (mask & QFont::FamilyResolved))
+request.family = other->request.family;
+if (! (mask & QFont::SizeResolved)) {
+request.pointSize = other->request.pointSize;
+request.pixelSize = other->request.pixelSize;
+}
+if (! (mask & QFont::StyleHintResolved))
+request.styleHint = other->request.styleHint;
+if (! (mask & QFont::StyleStrategyResolved))
+request.styleStrategy = other->request.styleStrategy;
+if (! (mask & QFont::WeightResolved))
+request.weight = other->request.weight;
+if (! (mask & QFont::StyleResolved))
+request.style = other->request.style;
+if (! (mask & QFont::FixedPitchResolved))
+request.fixedPitch = other->request.fixedPitch;
+if (! (mask & QFont::StretchResolved))
+request.stretch = other->request.stretch;
+if (! (mask & QFont::UnderlineResolved))
+underline = other->underline;
+if (! (mask & QFont::OverlineResolved))
+overline = other->overline;
+if (! (mask & QFont::StrikeOutResolved))
+strikeOut = other->strikeOut;
+if (! (mask & QFont::KerningResolved))
+kerning = other->kerning;
+if (! (mask & QFont::LetterSpacingResolved)) {
+letterSpacing = other->letterSpacing;
+letterSpacingIsAbsolute = other->letterSpacingIsAbsolute;
+}
+if (! (mask & QFont::WordSpacingResolved))
+wordSpacing = other->wordSpacing;
+if (! (mask & QFont::CapitalizationResolved))
+capital = other->capital;
+}
+QFontEngineData::QFontEngineData()
+: ref(1), fontCache(QFontCache::instance())
+{
+#if !defined(Q_WS_MAC)
+memset(engines, 0, QUnicodeTables::ScriptCount * sizeof(QFontEngine *));
+#else
+engine = 0;
+#endif
+}
+QFontEngineData::~QFontEngineData()
+{
+#if !defined(Q_WS_MAC)
+for (int i = 0; i < QUnicodeTables::ScriptCount; ++i) {
+if (engines[i])
+engines[i]->ref.deref();
+engines[i] = 0;
+}
+#else
+if (engine)
+engine->ref.deref();
+engine = 0;
+#endif // Q_WS_X11 || Q_WS_WIN || Q_WS_MAC
+}
+/*!
+\class QFont
+\reentrant
+\brief The QFont class specifies a font used for drawing text.
+\ingroup painting
+\ingroup appearance
+\ingroup shared
+\ingroup richtext-processing
+When you create a QFont object you specify various attributes that
+you want the font to have. Qt will use the font with the specified
+attributes, or if no matching font exists, Qt will use the closest
+matching installed font. The attributes of the font that is
+actually used are retrievable from a QFontInfo object. If the
+window system provides an exact match exactMatch() returns true.
+Use QFontMetrics to get measurements, e.g. the pixel length of a
+string using QFontMetrics::width().
+Note that a QApplication instance must exist before a QFont can be
+used. You can set the application's default font with
+QApplication::setFont().
+If a chosen font does not include all the characters that
+need to be displayed, QFont will try to find the characters in the
+nearest equivalent fonts. When a QPainter draws a character from a
+font the QFont will report whether or not it has the character; if
+it does not, QPainter will draw an unfilled square.
+Create QFonts like this:
+\snippet doc/src/snippets/code/src_gui_text_qfont.cpp 0
+The attributes set in the constructor can also be set later, e.g.
+setFamily(), setPointSize(), setPointSizeFloat(), setWeight() and
+setItalic(). The remaining attributes must be set after
+contstruction, e.g. setBold(), setUnderline(), setOverline(),
+setStrikeOut() and setFixedPitch(). QFontInfo objects should be
+created \e after the font's attributes have been set. A QFontInfo
+object will not change, even if you change the font's
+attributes. The corresponding "get" functions, e.g. family(),
+pointSize(), etc., return the values that were set, even though
+the values used may differ. The actual values are available from a
+QFontInfo object.
+If the requested font family is unavailable you can influence the
+\link #fontmatching font matching algorithm\endlink by choosing a
+particular \l{QFont::StyleHint} and \l{QFont::StyleStrategy} with
+setStyleHint(). The default family (corresponding to the current
+style hint) is returned by defaultFamily().
+The font-matching algorithm has a lastResortFamily() and
+lastResortFont() in cases where a suitable match cannot be found.
+You can provide substitutions for font family names using
+insertSubstitution() and insertSubstitutions(). Substitutions can
+be removed with removeSubstitution(). Use substitute() to retrieve
+a family's first substitute, or the family name itself if it has
+no substitutes. Use substitutes() to retrieve a list of a family's
+substitutes (which may be empty).
+Every QFont has a key() which you can use, for example, as the key
+in a cache or dictionary. If you want to store a user's font
+preferences you could use QSettings, writing the font information
+with toString() and reading it back with fromString(). The
+operator<<() and operator>>() functions are also available, but
+they work on a data stream.
+It is possible to set the height of characters shown on the screen
+to a specified number of pixels with setPixelSize(); however using
+setPointSize() has a similar effect and provides device
+independence.
+In X11 you can set a font using its system
+specific name with setRawName().
+Loading fonts can be expensive, especially on X11. QFont contains
+extensive optimizations to make the copying of QFont objects fast,
+and to cache the results of the slow window system functions it
+depends upon.
+\target fontmatching
+The font matching algorithm works as follows:
+\list 1
+\o The specified font family is searched for.
+\o If not found, the styleHint() is used to select a replacement
+family.
+\o Each replacement font family is searched for.
+\o If none of these are found or there was no styleHint(), "helvetica"
+will be searched for.
+\o If "helvetica" isn't found Qt will try the lastResortFamily().
+\o If the lastResortFamily() isn't found Qt will try the
+lastResortFont() which will always return a name of some kind.
+\endlist
+Note that the actual font matching algorithm varies from platform to platform.
+In Windows a request for the "Courier" font is automatically changed to
+"Courier New", an improved version of Courier that allows for smooth scaling.
+The older "Courier" bitmap font can be selected by setting the PreferBitmap
+style strategy (see setStyleStrategy()).
+Once a font is found, the remaining attributes are matched in order of
+priority:
+\list 1
+\o fixedPitch()
+\o pointSize() (see below)
+\o weight()
+\o style()
+\endlist
+If you have a font which matches on family, even if none of the
+other attributes match, this font will be chosen in preference to
+a font which doesn't match on family but which does match on the
+other attributes. This is because font family is the dominant
+search criteria.
+The point size is defined to match if it is within 20% of the
+requested point size. When several fonts match and are only
+distinguished by point size, the font with the closest point size
+to the one requested will be chosen.
+The actual family, font size, weight and other font attributes
+used for drawing text will depend on what's available for the
+chosen family under the window system. A QFontInfo object can be
+used to determine the actual values used for drawing the text.
+Examples:
+\snippet doc/src/snippets/code/src_gui_text_qfont.cpp 1
+If you had both an Adobe and a Cronyx Helvetica, you might get
+either.
+\snippet doc/src/snippets/code/src_gui_text_qfont.cpp 2
+You can specify the foundry you want in the family name. The font f
+in the above example will be set to "Helvetica
+[Cronyx]".
+To determine the attributes of the font actually used in the window
+system, use a QFontInfo object, e.g.
+\snippet doc/src/snippets/code/src_gui_text_qfont.cpp 3
+To find out font metrics use a QFontMetrics object, e.g.
+\snippet doc/src/snippets/code/src_gui_text_qfont.cpp 4
+For more general information on fonts, see the
+\link http://nwalsh.com/comp.fonts/FAQ/ comp.fonts FAQ.\endlink
+Information on encodings can be found from
+\link http://czyborra.com/ Roman Czyborra's\endlink page.
+\sa QFontComboBox, QFontMetrics, QFontInfo, QFontDatabase, {Character Map Example}
+*/
+/*!
+\internal
+\enum QFont::ResolveProperties
+This enum describes the properties of a QFont that can be set on a font
+individually and then considered resolved.
+\value FamilyResolved
+\value SizeResolved
+\value StyleHintResolved
+\value StyleStrategyResolved
+\value WeightResolved
+\value StyleResolved
+\value UnderlineResolved
+\value OverlineResolved
+\value StrikeOutResolved
+\value FixedPitchResolved
+\value StretchResolved
+\value KerningResolved
+\value CapitalizationResolved
+\value LetterSpacingResolved
+\value WordSpacingResolved
+\value CompletelyResolved
+*/
+/*!
+\enum QFont::Style
+This enum describes the different styles of glyphs that are used to
+display text.
+\value StyleNormal  Normal glyphs used in unstyled text.
+\value StyleItalic  Italic glyphs that are specifically designed for
+the purpose of representing italicized text.
+\value StyleOblique Glyphs with an italic appearance that are typically
+based on the unstyled glyphs, but are not fine-tuned
+for the purpose of representing italicized text.
+\sa Weight
+*/
+/*!
+\fn Qt::HANDLE QFont::handle() const
+Returns the window system handle to the font, for low-level
+access. Using this function is \e not portable.
+*/
+/*!
+\fn FT_Face QFont::freetypeFace() const
+Returns the handle to the primary FreeType face of the font. If font merging is not disabled a
+QFont can contain several physical fonts.
+Returns 0 if the font does not contain a FreeType face.
+\note This function is only available on platforms that provide the FreeType library;
+i.e., X11 and some Embedded Linux platforms.
+*/
+/*!
+\fn QString QFont::rawName() const
+Returns the name of the font within the underlying window system.
+Only on X11 when Qt was built without FontConfig support the XLFD (X Logical Font Description)
+is returned; otherwise an empty string.
+Using the return value of this function is usually \e not \e
+portable.
+\sa setRawName()
+*/
+/*!
+\fn void QFont::setRawName(const QString &name)
+Sets a font by its system specific name. The function is
+particularly useful under X, where system font settings (for
+example X resources) are usually available in XLFD (X Logical Font
+Description) form only. You can pass an XLFD as \a name to this
+function.
+A font set with setRawName() is still a full-featured QFont. It can
+be queried (for example with italic()) or modified (for example with
+setItalic()) and is therefore also suitable for rendering rich text.
+If Qt's internal font database cannot resolve the raw name, the
+font becomes a raw font with \a name as its family.
+Note that the present implementation does not handle wildcards in
+XLFDs well, and that font aliases (file \c fonts.alias in the font
+directory on X11) are not supported.
+\sa rawName(), setRawMode(), setFamily()
+*/
+/*!
+\fn QString QFont::lastResortFamily() const
+Returns the "last resort" font family name.
+The current implementation tries a wide variety of common fonts,
+returning the first one it finds. Is is possible that no family is
+found in which case an empty string is returned.
+\sa lastResortFont()
+*/
+/*!
+\fn QString QFont::defaultFamily() const
+Returns the family name that corresponds to the current style
+hint.
+\sa StyleHint styleHint() setStyleHint()
+*/
+/*!
+\fn QString QFont::lastResortFont() const
+Returns a "last resort" font name for the font matching algorithm.
+This is used if the last resort family is not available. It will
+always return a name, if necessary returning something like
+"fixed" or "system".
+The current implementation tries a wide variety of common fonts,
+returning the first one it finds. The implementation may change
+at any time, but this function will always return a string
+containing something.
+It is theoretically possible that there really isn't a
+lastResortFont() in which case Qt will abort with an error
+message. We have not been able to identify a case where this
+happens. Please \link bughowto.html report it as a bug\endlink if
+it does, preferably with a list of the fonts you have installed.
+\sa lastResortFamily() rawName()
+*/
+/*!
+Constructs a font from \a font for use on the paint device \a pd.
+*/
+QFont::QFont(const QFont &font, QPaintDevice *pd)
+: resolve_mask(font.resolve_mask)
+{
+Q_ASSERT(pd != 0);
+int dpi = pd->logicalDpiY();
+#ifdef Q_WS_X11
+const QX11Info *info = qt_x11Info(pd);
+int screen = info ? info->screen() : 0;
+#else
+const int screen = 0;
+#endif
+if (font.d->dpi != dpi || font.d->screen != screen ) {
+d = new QFontPrivate(*font.d);
+d->dpi = dpi;
+d->screen = screen;
+} else {
+d = font.d.data();
+}
+#ifdef Q_WS_WIN
+if (pd->devType() == QInternal::Printer && pd->getDC())
+d->hdc = pd->getDC();
+#endif
+}
+/*!
+\internal
+*/
+QFont::QFont(QFontPrivate *data)
+: d(data), resolve_mask(QFont::AllPropertiesResolved)
+{
+}
+/*! \internal
+Detaches the font object from common font data.
+*/
+void QFont::detach()
+{
+if (d->ref == 1) {
+if (d->engineData)
+d->engineData->ref.deref();
+d->engineData = 0;
+if (d->scFont && d->scFont != d.data())
+d->scFont->ref.deref();
+d->scFont = 0;
+return;
+}
+d.detach();
+}
+/*!
+Constructs a font object that uses the application's default font.
+\sa QApplication::setFont(), QApplication::font()
+*/
+QFont::QFont()
+: d(QApplication::font().d.data()), resolve_mask(0)
+{
+}
+/*!
+Constructs a font object with the specified \a family, \a
+pointSize, \a weight and \a italic settings.
+If \a pointSize is zero or negative, the point size of the font
+is set to a system-dependent default value. Generally, this is
+12 points, except on Symbian where it is 7 points.
+The \a family name may optionally also include a foundry name,
+e.g. "Helvetica [Cronyx]". If the \a family is
+available from more than one foundry and the foundry isn't
+specified, an arbitrary foundry is chosen. If the family isn't
+available a family will be set using the \l{QFont}{font matching}
+algorithm.
+\sa Weight, setFamily(), setPointSize(), setWeight(), setItalic(),
+setStyleHint() QApplication::font()
+*/
+QFont::QFont(const QString &family, int pointSize, int weight, bool italic)
+: d(new QFontPrivate()), resolve_mask(QFont::FamilyResolved)
+{
+if (pointSize <= 0) {
+#ifdef Q_OS_SYMBIAN
+pointSize = 7;
+#else
+pointSize = 12;
+#endif
+} else {
+resolve_mask |= QFont::SizeResolved;
+}
+if (weight < 0) {
+weight = Normal;
+} else {
+resolve_mask |= QFont::WeightResolved | QFont::StyleResolved;
+}
+d->request.family = family;
+d->request.pointSize = qreal(pointSize);
+d->request.pixelSize = -1;
+d->request.weight = weight;
+d->request.style = italic ? QFont::StyleItalic : QFont::StyleNormal;
+}
+/*!
+Constructs a font that is a copy of \a font.
+*/
+QFont::QFont(const QFont &font)
+: d(font.d.data()), resolve_mask(font.resolve_mask)
+{
+}
+/*!
+Destroys the font object and frees all allocated resources.
+*/
+QFont::~QFont()
+{
+}
+/*!
+Assigns \a font to this font and returns a reference to it.
+*/
+QFont &QFont::operator=(const QFont &font)
+{
+d = font.d.data();
+resolve_mask = font.resolve_mask;
+return *this;
+}
+/*!
+Returns the requested font family name, i.e. the name set in the
+constructor or the last setFont() call.
+\sa setFamily() substitutes() substitute()
+*/
+QString QFont::family() const
+{
+return d->request.family;
+}
+/*!
+Sets the family name of the font. The name is case insensitive and
+may include a foundry name.
+The \a family name may optionally also include a foundry name,
+e.g. "Helvetica [Cronyx]". If the \a family is
+available from more than one foundry and the foundry isn't
+specified, an arbitrary foundry is chosen. If the family isn't
+available a family will be set using the \l{QFont}{font matching}
+algorithm.
+\sa family(), setStyleHint(), QFontInfo
+*/
+void QFont::setFamily(const QString &family)
+{
+detach();
+d->request.family = family;
+#if defined(Q_WS_X11)
+d->request.addStyle.clear();
+#endif // Q_WS_X11
+resolve_mask |= QFont::FamilyResolved;
+}
+/*!
+Returns the point size of the font. Returns -1 if the font size
+was specified in pixels.
+\sa setPointSize() pointSizeF()
+*/
+int QFont::pointSize() const
+{
+return qRound(d->request.pointSize);
+}
+/*!
+Sets the point size to \a pointSize. The point size must be
+greater than zero.
+\sa pointSize() setPointSizeF()
+*/
+void QFont::setPointSize(int pointSize)
+{
+if (pointSize <= 0) {
+qWarning("QFont::setPointSize: Point size <= 0 (%d), must be greater than 0", pointSize);
+return;
+}
+detach();
+d->request.pointSize = qreal(pointSize);
+d->request.pixelSize = -1;
+resolve_mask |= QFont::SizeResolved;
+}
+/*!
+Sets the point size to \a pointSize. The point size must be
+greater than zero. The requested precision may not be achieved on
+all platforms.
+\sa pointSizeF() setPointSize() setPixelSize()
+*/
+void QFont::setPointSizeF(qreal pointSize)
+{
+if (pointSize <= 0) {
+qWarning("QFont::setPointSizeF: Point size <= 0 (%f), must be greater than 0", pointSize);
+return;
+}
+detach();
+d->request.pointSize = pointSize;
+d->request.pixelSize = -1;
+resolve_mask |= QFont::SizeResolved;
+}
+/*!
+Returns the point size of the font. Returns -1 if the font size was
+specified in pixels.
+\sa pointSize() setPointSizeF() pixelSize() QFontInfo::pointSize() QFontInfo::pixelSize()
+*/
+qreal QFont::pointSizeF() const
+{
+return d->request.pointSize;
+}
+/*!
+Sets the font size to \a pixelSize pixels.
+Using this function makes the font device dependent. Use
+setPointSize() or setPointSizeF() to set the size of the font
+in a device independent manner.
+\sa pixelSize()
+*/
+void QFont::setPixelSize(int pixelSize)
+{
+if (pixelSize <= 0) {
+qWarning("QFont::setPixelSize: Pixel size <= 0 (%d)", pixelSize);
+return;
+}
+detach();
+d->request.pixelSize = pixelSize;
+d->request.pointSize = -1;
+resolve_mask |= QFont::SizeResolved;
+}
+/*!
+Returns the pixel size of the font if it was set with
+setPixelSize(). Returns -1 if the size was set with setPointSize()
+or setPointSizeF().
+\sa setPixelSize() pointSize() QFontInfo::pointSize() QFontInfo::pixelSize()
+*/
+int QFont::pixelSize() const
+{
+return d->request.pixelSize;
+}
+#ifdef QT3_SUPPORT
+/*! \obsolete
+Sets the logical pixel height of font characters when shown on
+the screen to \a pixelSize.
+*/
+void QFont::setPixelSizeFloat(qreal pixelSize)
+{
+setPixelSize((int)pixelSize);
+}
+#endif
+/*!
+\fn bool QFont::italic() const
+Returns true if the style() of the font is not QFont::StyleNormal
+\sa setItalic() style()
+*/
+/*!
+\fn void QFont::setItalic(bool enable)
+Sets the style() of the font to QFont::StyleItalic if \a enable is true;
+otherwise the style is set to QFont::StyleNormal.
+\sa italic() QFontInfo
+*/
+/*!
+Returns the style of the font.
+\sa setStyle()
+*/
+QFont::Style QFont::style() const
+{
+return (QFont::Style)d->request.style;
+}
+/*!
+Sets the style of the font to \a style.
+\sa italic(), QFontInfo
+*/
+void QFont::setStyle(Style style)
+{
+detach();
+d->request.style = style;
+resolve_mask |= QFont::StyleResolved;
+}
+/*!
+Returns the weight of the font which is one of the enumerated
+values from \l{QFont::Weight}.
+\sa setWeight(), Weight, QFontInfo
+*/
+int QFont::weight() const
+{
+return d->request.weight;
+}
+/*!
+\enum QFont::Weight
+Qt uses a weighting scale from 0 to 99 similar to, but not the
+same as, the scales used in Windows or CSS. A weight of 0 is
+ultralight, whilst 99 will be an extremely black.
+This enum contains the predefined font weights:
+\value Light 25
+\value Normal 50
+\value DemiBold 63
+\value Bold 75
+\value Black 87
+*/
+/*!
+Sets the weight the font to \a weight, which should be a value
+from the \l QFont::Weight enumeration.
+\sa weight(), QFontInfo
+*/
+void QFont::setWeight(int weight)
+{
+Q_ASSERT_X(weight >= 0 && weight <= 99, "QFont::setWeight", "Weight must be between 0 and 99");
+detach();
+d->request.weight = weight;
+resolve_mask |= QFont::WeightResolved;
+}
+/*!
+\fn bool QFont::bold() const
+Returns true if weight() is a value greater than \link Weight
+QFont::Normal \endlink; otherwise returns false.
+\sa weight(), setBold(), QFontInfo::bold()
+*/
+/*!
+\fn void QFont::setBold(bool enable)
+If \a enable is true sets the font's weight to \link Weight
+QFont::Bold \endlink; otherwise sets the weight to \link Weight
+QFont::Normal\endlink.
+For finer boldness control use setWeight().
+\sa bold(), setWeight()
+*/
+/*!
+Returns true if underline has been set; otherwise returns false.
+\sa setUnderline()
+*/
+bool QFont::underline() const
+{
+return d->underline;
+}
+/*!
+If \a enable is true, sets underline on; otherwise sets underline
+off.
+\sa underline(), QFontInfo
+*/
+void QFont::setUnderline(bool enable)
+{
+detach();
+d->underline = enable;
+resolve_mask |= QFont::UnderlineResolved;
+}
+/*!
+Returns true if overline has been set; otherwise returns false.
+\sa setOverline()
+*/
+bool QFont::overline() const
+{
+return d->overline;
+}
+/*!
+If \a enable is true, sets overline on; otherwise sets overline off.
+\sa overline(), QFontInfo
+*/
+void QFont::setOverline(bool enable)
+{
+detach();
+d->overline = enable;
+resolve_mask |= QFont::OverlineResolved;
+}
+/*!
+Returns true if strikeout has been set; otherwise returns false.
+\sa setStrikeOut()
+*/
+bool QFont::strikeOut() const
+{
+return d->strikeOut;
+}
+/*!
+If \a enable is true, sets strikeout on; otherwise sets strikeout
+off.
+\sa strikeOut(), QFontInfo
+*/
+void QFont::setStrikeOut(bool enable)
+{
+detach();
+d->strikeOut = enable;
+resolve_mask |= QFont::StrikeOutResolved;
+}
+/*!
+Returns true if fixed pitch has been set; otherwise returns false.
+\sa setFixedPitch(), QFontInfo::fixedPitch()
+*/
+bool QFont::fixedPitch() const
+{
+return d->request.fixedPitch;
+}
+/*!
+If \a enable is true, sets fixed pitch on; otherwise sets fixed
+pitch off.
+\sa fixedPitch(), QFontInfo
+*/
+void QFont::setFixedPitch(bool enable)
+{
+detach();
+d->request.fixedPitch = enable;
+d->request.ignorePitch = false;
+resolve_mask |= QFont::FixedPitchResolved;
+}
+/*!
+Returns true if kerning should be used when drawing text with this font.
+\sa setKerning()
+*/
+bool QFont::kerning() const
+{
+return d->kerning;
+}
+/*!
+Enables kerning for this font if \a enable is true; otherwise
+disables it. By default, kerning is enabled.
+When kerning is enabled, glyph metrics do not add up anymore,
+even for Latin text. In other words, the assumption that
+width('a') + width('b') is equal to width("ab") is not
+neccesairly true.
+\sa kerning(), QFontMetrics
+*/
+void QFont::setKerning(bool enable)
+{
+detach();
+d->kerning = enable;
+resolve_mask |= QFont::KerningResolved;
+}
+/*!
+Returns the StyleStrategy.
+The style strategy affects the \l{QFont}{font matching} algorithm.
+See \l QFont::StyleStrategy for the list of available strategies.
+\sa setStyleHint() QFont::StyleHint
+*/
+QFont::StyleStrategy QFont::styleStrategy() const
+{
+return (StyleStrategy) d->request.styleStrategy;
+}
+/*!
+Returns the StyleHint.
+The style hint affects the \l{QFont}{font matching} algorithm.
+See \l QFont::StyleHint for the list of available hints.
+\sa setStyleHint(), QFont::StyleStrategy QFontInfo::styleHint()
+*/
+QFont::StyleHint QFont::styleHint() const
+{
+return (StyleHint) d->request.styleHint;
+}
+/*!
+\enum QFont::StyleHint
+Style hints are used by the \l{QFont}{font matching} algorithm to
+find an appropriate default family if a selected font family is
+not available.
+\value AnyStyle leaves the font matching algorithm to choose the
+family. This is the default.
+\value SansSerif the font matcher prefer sans serif fonts.
+\value Helvetica is a synonym for \c SansSerif.
+\value Serif the font matcher prefers serif fonts.
+\value Times is a synonym for \c Serif.
+\value TypeWriter the font matcher prefers fixed pitch fonts.
+\value Courier a synonym for \c TypeWriter.
+\value OldEnglish the font matcher prefers decorative fonts.
+\value Decorative is a synonym for \c OldEnglish.
+\value System the font matcher prefers system fonts.
+*/
+/*!
+\enum QFont::StyleStrategy
+The style strategy tells the \l{QFont}{font matching} algorithm
+what type of fonts should be used to find an appropriate default
+family.
+The following strategies are available:
+\value PreferDefault the default style strategy. It does not prefer
+any type of font.
+\value PreferBitmap prefers bitmap fonts (as opposed to outline
+fonts).
+\value PreferDevice prefers device fonts.
+\value PreferOutline prefers outline fonts (as opposed to bitmap fonts).
+\value ForceOutline forces the use of outline fonts.
+\value NoAntialias don't antialias the fonts.
+\value PreferAntialias antialias if possible.
+\value OpenGLCompatible forces the use of OpenGL compatible
+fonts.
+\value NoFontMerging If a font does not contain a character requested
+to draw then Qt automatically chooses a similar looking for that contains
+the character. This flag disables this feature.
+Any of these may be OR-ed with one of these flags:
+\value PreferMatch prefer an exact match. The font matcher will try to
+use the exact font size that has been specified.
+\value PreferQuality prefer the best quality font. The font matcher
+will use the nearest standard point size that the font
+supports.
+*/
+/*!
+Sets the style hint and strategy to \a hint and \a strategy,
+respectively.
+If these aren't set explicitly the style hint will default to
+\c AnyStyle and the style strategy to \c PreferDefault.
+Qt does not support style hints on X11 since this information
+is not provided by the window system.
+\sa StyleHint, styleHint(), StyleStrategy, styleStrategy(), QFontInfo
+*/
+void QFont::setStyleHint(StyleHint hint, StyleStrategy strategy)
+{
+detach();
+if ((resolve_mask & (QFont::StyleHintResolved | QFont::StyleStrategyResolved)) &&
+(StyleHint) d->request.styleHint == hint &&
+(StyleStrategy) d->request.styleStrategy == strategy)
+return;
+d->request.styleHint = hint;
+d->request.styleStrategy = strategy;
+resolve_mask |= QFont::StyleHintResolved;
+resolve_mask |= QFont::StyleStrategyResolved;
+#if defined(Q_WS_X11)
+d->request.addStyle.clear();
+#endif // Q_WS_X11
+}
+/*!
+Sets the style strategy for the font to \a s.
+\sa QFont::StyleStrategy
+*/
+void QFont::setStyleStrategy(StyleStrategy s)
+{
+detach();
+if ((resolve_mask & QFont::StyleStrategyResolved) &&
+s == (StyleStrategy)d->request.styleStrategy)
+return;
+d->request.styleStrategy = s;
+resolve_mask |= QFont::StyleStrategyResolved;
+}
+/*!
+\enum QFont::Stretch
+Predefined stretch values that follow the CSS naming convention. The higher
+the value, the more stretched the text is.
+\value UltraCondensed 50
+\value ExtraCondensed 62
+\value Condensed 75
+\value SemiCondensed 87
+\value Unstretched 100
+\value SemiExpanded 112
+\value Expanded 125
+\value ExtraExpanded 150
+\value UltraExpanded 200
+\sa setStretch() stretch()
+*/
+/*!
+Returns the stretch factor for the font.
+\sa setStretch()
+*/
+int QFont::stretch() const
+{
+return d->request.stretch;
+}
+/*!
+Sets the stretch factor for the font.
+The stretch factor changes the width of all characters in the font
+by \a factor percent.  For example, setting \a factor to 150
+results in all characters in the font being 1.5 times (ie. 150%)
+wider.  The default stretch factor is 100.  The minimum stretch
+factor is 1, and the maximum stretch factor is 4000.
+The stretch factor is only applied to outline fonts.  The stretch
+factor is ignored for bitmap fonts.
+NOTE: QFont cannot stretch XLFD fonts.  When loading XLFD fonts on
+X11, the stretch factor is matched against a predefined set of
+values for the SETWIDTH_NAME field of the XLFD.
+\sa stretch() QFont::Stretch
+*/
+void QFont::setStretch(int factor)
+{
+if (factor < 1 || factor > 4000) {
+qWarning("QFont::setStretch: Parameter '%d' out of range", factor);
+return;
+}
+if ((resolve_mask & QFont::StretchResolved) &&
+d->request.stretch == (uint)factor)
+return;
+detach();
+d->request.stretch = (uint)factor;
+resolve_mask |= QFont::StretchResolved;
+}
+/*!
+\enum QFont::SpacingType
+\since 4.4
+\value PercentageSpacing  A value of 100 will keep the spacing unchanged; a value of 200 will enlarge the
+spacing after a character by the width of the character itself.
+\value AbsoluteSpacing      A positive value increases the letter spacing by the corresponding pixels; a negative
+value decreases the spacing.
+*/
+/*!
+\since 4.4
+Returns the letter spacing for the font.
+\sa setLetterSpacing(), letterSpacingType(), setWordSpacing()
+*/
+qreal QFont::letterSpacing() const
+{
+return d->letterSpacing.toReal();
+}
+/*!
+\since 4.4
+Sets the letter spacing for the font to \a spacing and the type
+of spacing to \a type.
+Letter spacing changes the default spacing between individual
+letters in the font.  The spacing between the letters can be
+made smaller as well as larger.
+\sa letterSpacing(), letterSpacingType(), setWordSpacing()
+*/
+void QFont::setLetterSpacing(SpacingType type, qreal spacing)
+{
+const QFixed newSpacing = QFixed::fromReal(spacing);
+const bool absoluteSpacing = type == AbsoluteSpacing;
+if ((resolve_mask & QFont::LetterSpacingResolved) &&
+d->letterSpacingIsAbsolute == absoluteSpacing &&
+d->letterSpacing == newSpacing)
+return;
+detach();
+d->letterSpacing = newSpacing;
+d->letterSpacingIsAbsolute = absoluteSpacing;
+resolve_mask |= QFont::LetterSpacingResolved;
+}
+/*!
+\since 4.4
+Returns the spacing type used for letter spacing.
+\sa letterSpacing(), setLetterSpacing(), setWordSpacing()
+*/
+QFont::SpacingType QFont::letterSpacingType() const
+{
+return d->letterSpacingIsAbsolute ? AbsoluteSpacing : PercentageSpacing;
+}
+/*!
+\since 4.4
+Returns the word spacing for the font.
+\sa setWordSpacing(), setLetterSpacing()
+*/
+qreal QFont::wordSpacing() const
+{
+return d->wordSpacing.toReal();
+}
+/*!
+\since 4.4
+Sets the word spacing for the font to \a spacing.
+Word spacing changes the default spacing between individual
+words. A positive value increases the word spacing
+by a corresponding amount of pixels, while a negative value
+decreases the inter-word spacing accordingly.
+Word spacing will not apply to writing systems, where indiviaul
+words are not separated by white space.
+\sa wordSpacing(), setLetterSpacing()
+*/
+void QFont::setWordSpacing(qreal spacing)
+{
+const QFixed newSpacing = QFixed::fromReal(spacing);
+if ((resolve_mask & QFont::WordSpacingResolved) &&
+d->wordSpacing == newSpacing)
+return;
+detach();
+d->wordSpacing = newSpacing;
+resolve_mask |= QFont::WordSpacingResolved;
+}
+/*!
+\enum QFont::Capitalization
+\since 4.4
+Rendering option for text this font applies to.
+\value MixedCase    This is the normal text rendering option where no capitalization change is applied.
+\value AllUppercase This alters the text to be rendered in all uppercase type.
+\value AllLowercase This alters the text to be rendered in all lowercase type.
+\value SmallCaps    This alters the text to be rendered in small-caps type.
+\value Capitalize   This alters the text to be rendered with the first character of each word as an uppercase character.
+*/
+/*!
+\since 4.4
+Sets the capitalization of the text in this font to \a caps.
+A font's capitalization makes the text appear in the selected capitalization mode.
+\sa capitalization()
+*/
+void QFont::setCapitalization(Capitalization caps)
+{
+if ((resolve_mask & QFont::CapitalizationResolved) &&
+capitalization() == caps)
+return;
+detach();
+d->capital = caps;
+resolve_mask |= QFont::CapitalizationResolved;
+}
+/*!
+\since 4.4
+Returns the current capitalization type of the font.
+\sa setCapitalization()
+*/
+QFont::Capitalization QFont::capitalization() const
+{
+return static_cast<QFont::Capitalization> (d->capital);
+}
+/*!
+If \a enable is true, turns raw mode on; otherwise turns raw mode
+off. This function only has an effect under X11.
+If raw mode is enabled, Qt will search for an X font with a
+complete font name matching the family name, ignoring all other
+values set for the QFont. If the font name matches several fonts,
+Qt will use the first font returned by X. QFontInfo \e cannot be
+used to fetch information about a QFont using raw mode (it will
+return the values set in the QFont for all parameters, including
+the family name).
+\warning Do not use raw mode unless you really, really need it! In
+most (if not all) cases, setRawName() is a much better choice.
+\sa rawMode(), setRawName()
+*/
+void QFont::setRawMode(bool enable)
+{
+detach();
+if ((bool) d->rawMode == enable) return;
+d->rawMode = enable;
+}
+/*!
+Returns true if a window system font exactly matching the settings
+of this font is available.
+\sa QFontInfo
+*/
+bool QFont::exactMatch() const
+{
+QFontEngine *engine = d->engineForScript(QUnicodeTables::Common);
+Q_ASSERT(engine != 0);
+return (d->rawMode
+? engine->type() != QFontEngine::Box
+: d->request.exactMatch(engine->fontDef));
+}
+/*!
+Returns true if this font is equal to \a f; otherwise returns
+false.
+Two QFonts are considered equal if their font attributes are
+equal. If rawMode() is enabled for both fonts, only the family
+fields are compared.
+\sa operator!=() isCopyOf()
+*/
+bool QFont::operator==(const QFont &f) const
+{
+return (f.d == d
+|| (f.d->request   == d->request
+&& f.d->request.pointSize == d->request.pointSize
+&& f.d->underline == d->underline
+&& f.d->overline  == d->overline
+&& f.d->strikeOut == d->strikeOut
+&& f.d->kerning == d->kerning));
+}
+/*!
+Provides an arbitrary comparison of this font and font \a f.
+All that is guaranteed is that the operator returns false if both
+fonts are equal and that (f1 \< f2) == !(f2 \< f1) if the fonts
+are not equal.
+This function is useful in some circumstances, for example if you
+want to use QFont objects as keys in a QMap.
+\sa operator==() operator!=() isCopyOf()
+*/
+bool QFont::operator<(const QFont &f) const
+{
+if (f.d == d) return false;
+// the < operator for fontdefs ignores point sizes.
+QFontDef &r1 = f.d->request;
+QFontDef &r2 = d->request;
+if (r1.pointSize != r2.pointSize) return r1.pointSize < r2.pointSize;
+if (r1.pixelSize != r2.pixelSize) return r1.pixelSize < r2.pixelSize;
+if (r1.weight != r2.weight) return r1.weight < r2.weight;
+if (r1.style != r2.style) return r1.style < r2.style;
+if (r1.stretch != r2.stretch) return r1.stretch < r2.stretch;
+if (r1.styleHint != r2.styleHint) return r1.styleHint < r2.styleHint;
+if (r1.styleStrategy != r2.styleStrategy) return r1.styleStrategy < r2.styleStrategy;
+if (r1.family != r2.family) return r1.family < r2.family;
+#ifdef Q_WS_X11
+if (r1.addStyle != r2.addStyle) return r1.addStyle < r2.addStyle;
+#endif // Q_WS_X11
+int f1attrs = (f.d->underline << 3) + (f.d->overline << 2) + (f.d->strikeOut<<1) + f.d->kerning;
+int f2attrs = (d->underline << 3) + (d->overline << 2) + (d->strikeOut<<1) + d->kerning;
+return f1attrs < f2attrs;
+}
+/*!
+Returns true if this font is different from \a f; otherwise
+returns false.
+Two QFonts are considered to be different if their font attributes
+are different. If rawMode() is enabled for both fonts, only the
+family fields are compared.
+\sa operator==()
+*/
+bool QFont::operator!=(const QFont &f) const
+{
+return !(operator==(f));
+}
+/*!
+Returns the font as a QVariant
+*/
+QFont::operator QVariant() const
+{
+return QVariant(QVariant::Font, this);
+}
+/*!
+Returns true if this font and \a f are copies of each other, i.e.
+one of them was created as a copy of the other and neither has
+been modified since. This is much stricter than equality.
+\sa operator=() operator==()
+*/
+bool QFont::isCopyOf(const QFont & f) const
+{
+return d == f.d;
+}
+/*!
+Returns true if raw mode is used for font name matching; otherwise
+returns false.
+\sa setRawMode() rawName()
+*/
+bool QFont::rawMode() const
+{
+return d->rawMode;
+}
+/*!
+Returns a new QFont that has attributes copied from \a other that
+have not been previously set on this font.
+*/
+QFont QFont::resolve(const QFont &other) const
+{
+if (*this == other
+&& (resolve_mask == other.resolve_mask || resolve_mask == 0)
+&& d->dpi == other.d->dpi) {
+QFont o = other;
+o.resolve_mask = resolve_mask;
+return o;
+}
+QFont font(*this);
+font.detach();
+font.d->resolve(resolve_mask, other.d.data());
+return font;
+}
+/*!
+\fn uint QFont::resolve() const
+\internal
+*/
+/*!
+\fn void QFont::resolve(uint mask)
+\internal
+*/
+#ifdef QT3_SUPPORT
+/*! \obsolete
+Please use QApplication::font() instead.
+*/
+QFont QFont::defaultFont()
+{
+return QApplication::font();
+}
+/*! \obsolete
+Please use QApplication::setFont() instead.
+*/
+void QFont::setDefaultFont(const QFont &f)
+{
+QApplication::setFont(f);
+}
+/*!
+\fn qreal QFont::pointSizeFloat() const
+\compat
+Use pointSizeF() instead.
+*/
+/*!
+\fn void QFont::setPointSizeFloat(qreal size)
+\compat
+Use setPointSizeF() instead.
+*/
+#endif
+/*****************************************************************************
+QFont substitution management
+*****************************************************************************/
+typedef QHash<QString, QStringList> QFontSubst;
+Q_GLOBAL_STATIC(QFontSubst, globalFontSubst)
+// create substitution dict
+static void initFontSubst()
+{
+// default substitutions
+static const char *initTbl[] = {
+#if defined(Q_WS_X11)
+"arial",        "helvetica",
+"times new roman", "times",
+"courier new",  "courier",
+"sans serif",   "helvetica",
+#elif defined(Q_WS_WIN)
+"times",        "times new roman",
+"courier",      "courier new",
+"helvetica",    "arial",
+"sans serif",   "arial",
+#endif
+0,              0
+};
+QFontSubst *fontSubst = globalFontSubst();
+Q_ASSERT(fontSubst != 0);
+if (!fontSubst->isEmpty())
+return;
+#if defined(Q_WS_X11) && !defined(QT_NO_FONTCONFIG)
+if (X11->has_fontconfig)
+return;
+#endif
+for (int i=0; initTbl[i] != 0; i += 2) {
+QStringList &list = (*fontSubst)[QString::fromLatin1(initTbl[i])];
+list.append(QString::fromLatin1(initTbl[i+1]));
+}
+}
+/*!
+Returns the first family name to be used whenever \a familyName is
+specified. The lookup is case insensitive.
+If there is no substitution for \a familyName, \a familyName is
+returned.
+To obtain a list of substitutions use substitutes().
+\sa setFamily() insertSubstitutions() insertSubstitution() removeSubstitution()
+*/
+QString QFont::substitute(const QString &familyName)
+{
+initFontSubst();
+QFontSubst *fontSubst = globalFontSubst();
+Q_ASSERT(fontSubst != 0);
+QFontSubst::ConstIterator it = fontSubst->constFind(familyName.toLower());
+if (it != fontSubst->constEnd() && !(*it).isEmpty())
+return (*it).first();
+return familyName;
+}
+/*!
+Returns a list of family names to be used whenever \a familyName
+is specified. The lookup is case insensitive.
+If there is no substitution for \a familyName, an empty list is
+returned.
+\sa substitute() insertSubstitutions() insertSubstitution() removeSubstitution()
+*/
+QStringList QFont::substitutes(const QString &familyName)
+{
+initFontSubst();
+QFontSubst *fontSubst = globalFontSubst();
+Q_ASSERT(fontSubst != 0);
+return fontSubst->value(familyName.toLower(), QStringList());
+}
+/*!
+Inserts \a substituteName into the substitution
+table for the family \a familyName.
+\sa insertSubstitutions() removeSubstitution() substitutions() substitute() substitutes()
+*/
+void QFont::insertSubstitution(const QString &familyName,
+const QString &substituteName)
+{
+initFontSubst();
+QFontSubst *fontSubst = globalFontSubst();
+Q_ASSERT(fontSubst != 0);
+QStringList &list = (*fontSubst)[familyName.toLower()];
+QString s = substituteName.toLower();
+if (!list.contains(s))
+list.append(s);
+}
+/*!
+Inserts the list of families \a substituteNames into the
+substitution list for \a familyName.
+\sa insertSubstitution(), removeSubstitution(), substitutions(), substitute()
+*/
+void QFont::insertSubstitutions(const QString &familyName,
+const QStringList &substituteNames)
+{
+initFontSubst();
+QFontSubst *fontSubst = globalFontSubst();
+Q_ASSERT(fontSubst != 0);
+QStringList &list = (*fontSubst)[familyName.toLower()];
+QStringList::ConstIterator it = substituteNames.constBegin();
+while (it != substituteNames.constEnd()) {
+QString s = (*it).toLower();
+if (!list.contains(s))
+list.append(s);
+it++;
+}
+}
+/*! \fn void QFont::initialize()
+\internal
+Internal function that initializes the font system.  The font cache
+and font dict do not alloc the keys. The key is a QString which is
+shared between QFontPrivate and QXFontName.
+*/
+/*! \fn void QFont::cleanup()
+\internal
+Internal function that cleans up the font system.
+*/
+// ### mark: should be called removeSubstitutions()
+/*!
+Removes all the substitutions for \a familyName.
+\sa insertSubstitutions(), insertSubstitution(), substitutions(), substitute()
+*/
+void QFont::removeSubstitution(const QString &familyName)
+{ // ### function name should be removeSubstitutions() or
+// ### removeSubstitutionList()
+initFontSubst();
+QFontSubst *fontSubst = globalFontSubst();
+Q_ASSERT(fontSubst != 0);
+fontSubst->remove(familyName.toLower());
+}
+/*!
+Returns a sorted list of substituted family names.
+\sa insertSubstitution(), removeSubstitution(), substitute()
+*/
+QStringList QFont::substitutions()
+{
+initFontSubst();
+QFontSubst *fontSubst = globalFontSubst();
+Q_ASSERT(fontSubst != 0);
+QStringList ret;
+QFontSubst::ConstIterator it = fontSubst->constBegin();
+while (it != fontSubst->constEnd()) {
+ret.append(it.key());
+++it;
+}
+ret.sort();
+return ret;
+}
+/*  \internal
+Internal function. Converts boolean font settings to an unsigned
+8-bit number. Used for serialization etc.
+*/
+static quint8 get_font_bits(int version, const QFontPrivate *f)
+{
+Q_ASSERT(f != 0);
+quint8 bits = 0;
+if (f->request.style)
+bits |= 0x01;
+if (f->underline)
+bits |= 0x02;
+if (f->overline)
+bits |= 0x40;
+if (f->strikeOut)
+bits |= 0x04;
+if (f->request.fixedPitch)
+bits |= 0x08;
+// if (f.hintSetByUser)
+// bits |= 0x10;
+if (f->rawMode)
+bits |= 0x20;
+if (version >= QDataStream::Qt_4_0) {
+if (f->kerning)
+bits |= 0x10;
+}
+if (f->request.style == QFont::StyleOblique)
+bits |= 0x80;
+return bits;
+}
+static quint8 get_extended_font_bits(const QFontPrivate *f)
+{
+Q_ASSERT(f != 0);
+quint8 bits = 0;
+if (f->request.ignorePitch)
+bits |= 0x01;
+if (f->letterSpacingIsAbsolute)
+bits |= 0x02;
+return bits;
+}
+#ifndef QT_NO_DATASTREAM
+/*  \internal
+Internal function. Sets boolean font settings from an unsigned
+8-bit number. Used for serialization etc.
+*/
+static void set_font_bits(int version, quint8 bits, QFontPrivate *f)
+{
+Q_ASSERT(f != 0);
+f->request.style         = (bits & 0x01) != 0 ? QFont::StyleItalic : QFont::StyleNormal;
+f->underline             = (bits & 0x02) != 0;
+f->overline              = (bits & 0x40) != 0;
+f->strikeOut             = (bits & 0x04) != 0;
+f->request.fixedPitch    = (bits & 0x08) != 0;
+// f->hintSetByUser      = (bits & 0x10) != 0;
+f->rawMode               = (bits & 0x20) != 0;
+if (version >= QDataStream::Qt_4_0)
+f->kerning               = (bits & 0x10) != 0;
+if ((bits & 0x80) != 0)
+f->request.style         = QFont::StyleOblique;
+}
+static void set_extended_font_bits(quint8 bits, QFontPrivate *f)
+{
+Q_ASSERT(f != 0);
+f->request.ignorePitch = (bits & 0x01) != 0;
+f->letterSpacingIsAbsolute = (bits & 0x02) != 0;
+}
+#endif
+/*!
+Returns the font's key, a textual representation of a font. It is
+typically used as the key for a cache or dictionary of fonts.
+\sa QMap
+*/
+QString QFont::key() const
+{
+return toString();
+}
+/*!
+Returns a description of the font. The description is a
+comma-separated list of the attributes, perfectly suited for use
+in QSettings.
+\sa fromString()
+*/
+QString QFont::toString() const
+{
+const QChar comma(QLatin1Char(','));
+return family() + comma +
+QString::number(     pointSizeF()) + comma +
+QString::number(      pixelSize()) + comma +
+QString::number((int) styleHint()) + comma +
+QString::number(         weight()) + comma +
+QString::number((int)     style()) + comma +
+QString::number((int) underline()) + comma +
+QString::number((int) strikeOut()) + comma +
+QString::number((int)fixedPitch()) + comma +
+QString::number((int)   rawMode());
+}
+/*!
+Sets this font to match the description \a descrip. The description
+is a comma-separated list of the font attributes, as returned by
+toString().
+\sa toString()
+*/
+bool QFont::fromString(const QString &descrip)
+{
+QStringList l(descrip.split(QLatin1Char(',')));
+int count = l.count();
+if (!count || (count > 2 && count < 9) || count > 11) {
+qWarning("QFont::fromString: Invalid description '%s'",
+descrip.isEmpty() ? "(empty)" : descrip.toLatin1().data());
+return false;
+}
+setFamily(l[0]);
+if (count > 1 && l[1].toDouble() > 0.0)
+setPointSizeF(l[1].toDouble());
+if (count == 9) {
+setStyleHint((StyleHint) l[2].toInt());
+setWeight(qMax(qMin(99, l[3].toInt()), 0));
+setItalic(l[4].toInt());
+setUnderline(l[5].toInt());
+setStrikeOut(l[6].toInt());
+setFixedPitch(l[7].toInt());
+setRawMode(l[8].toInt());
+} else if (count == 10) {
+if (l[2].toInt() > 0)
+setPixelSize(l[2].toInt());
+setStyleHint((StyleHint) l[3].toInt());
+setWeight(qMax(qMin(99, l[4].toInt()), 0));
+setStyle((QFont::Style)l[5].toInt());
+setUnderline(l[6].toInt());
+setStrikeOut(l[7].toInt());
+setFixedPitch(l[8].toInt());
+setRawMode(l[9].toInt());
+}
+if (count >= 9 && !d->request.fixedPitch) // assume 'false' fixedPitch equals default
+d->request.ignorePitch = true;
+return true;
+}
+#if !defined(Q_WS_QWS)
+/*! \internal
+Internal function that dumps font cache statistics.
+*/
+void QFont::cacheStatistics()
+{
+}
+#endif // !Q_WS_QWS
+/*****************************************************************************
+QFont stream functions
+*****************************************************************************/
+#ifndef QT_NO_DATASTREAM
+/*!
+\relates QFont
+Writes the font \a font to the data stream \a s. (toString()
+writes to a text stream.)
+\sa \link datastreamformat.html Format of the QDataStream operators \endlink
+*/
+QDataStream &operator<<(QDataStream &s, const QFont &font)
+{
+if (s.version() == 1) {
+s << font.d->request.family.toLatin1();
+} else {
+s << font.d->request.family;
+}
+if (s.version() >= QDataStream::Qt_4_0) {
+// 4.0
+double pointSize = font.d->request.pointSize;
+qint32 pixelSize = font.d->request.pixelSize;
+s << pointSize;
+s << pixelSize;
+} else if (s.version() <= 3) {
+qint16 pointSize = (qint16) (font.d->request.pointSize * 10);
+if (pointSize < 0) {
+#ifdef Q_WS_X11
+pointSize = (qint16)(font.d->request.pixelSize*720/QX11Info::appDpiY());
+#else
+pointSize = (qint16)QFontInfo(font).pointSize() * 10;
+#endif
+}
+s << pointSize;
+} else {
+s << (qint16) (font.d->request.pointSize * 10);
+s << (qint16) font.d->request.pixelSize;
+}
+s << (quint8) font.d->request.styleHint;
+if (s.version() >= QDataStream::Qt_3_1)
+s << (quint8) font.d->request.styleStrategy;
+s << (quint8) 0
+<< (quint8) font.d->request.weight
+<< get_font_bits(s.version(), font.d.data());
+if (s.version() >= QDataStream::Qt_4_3)
+s << (quint16)font.d->request.stretch;
+if (s.version() >= QDataStream::Qt_4_4)
+s << get_extended_font_bits(font.d.data());
+if (s.version() >= QDataStream::Qt_4_5) {
+s << font.d->letterSpacing.value();
+s << font.d->wordSpacing.value();
+}
+return s;
+}
+/*!
+\relates QFont
+Reads the font \a font from the data stream \a s. (fromString()
+reads from a text stream.)
+\sa \link datastreamformat.html Format of the QDataStream operators \endlink
+*/
+QDataStream &operator>>(QDataStream &s, QFont &font)
+{
+font.d = new QFontPrivate;
+font.resolve_mask = QFont::AllPropertiesResolved;
+quint8 styleHint, styleStrategy = QFont::PreferDefault, charSet, weight, bits;
+if (s.version() == 1) {
+QByteArray fam;
+s >> fam;
+font.d->request.family = QString::fromLatin1(fam);
+} else {
+s >> font.d->request.family;
+}
+if (s.version() >= QDataStream::Qt_4_0) {
+// 4.0
+double pointSize;
+qint32 pixelSize;
+s >> pointSize;
+s >> pixelSize;
+font.d->request.pointSize = qreal(pointSize);
+font.d->request.pixelSize = pixelSize;
+} else {
+qint16 pointSize, pixelSize = -1;
+s >> pointSize;
+if (s.version() >= 4)
+s >> pixelSize;
+font.d->request.pointSize = qreal(pointSize / 10.);
+font.d->request.pixelSize = pixelSize;
+}
+s >> styleHint;
+if (s.version() >= QDataStream::Qt_3_1)
+s >> styleStrategy;
+s >> charSet;
+s >> weight;
+s >> bits;
+font.d->request.styleHint = styleHint;
+font.d->request.styleStrategy = styleStrategy;
+font.d->request.weight = weight;
+set_font_bits(s.version(), bits, font.d.data());
+if (s.version() >= QDataStream::Qt_4_3) {
+quint16 stretch;
+s >> stretch;
+font.d->request.stretch = stretch;
+}
+if (s.version() >= QDataStream::Qt_4_4) {
+quint8 extendedBits;
+s >> extendedBits;
+set_extended_font_bits(extendedBits, font.d.data());
+}
+if (s.version() >= QDataStream::Qt_4_5) {
+int value;
+s >> value;
+font.d->letterSpacing.setValue(value);
+s >> value;
+font.d->wordSpacing.setValue(value);
+}
+return s;
+}
+#endif // QT_NO_DATASTREAM
+/*****************************************************************************
+QFontInfo member functions
+*****************************************************************************/
+/*!
+\class QFontInfo
+\reentrant
+\brief The QFontInfo class provides general information about fonts.
+\ingroup appearance
+\ingroup shared
+The QFontInfo class provides the same access functions as QFont,
+e.g. family(), pointSize(), italic(), weight(), fixedPitch(),
+styleHint() etc. But whilst the QFont access functions return the
+values that were set, a QFontInfo object returns the values that
+apply to the font that will actually be used to draw the text.
+For example, when the program asks for a 25pt Courier font on a
+machine that has a non-scalable 24pt Courier font, QFont will
+(normally) use the 24pt Courier for rendering. In this case,
+QFont::pointSize() returns 25 and QFontInfo::pointSize() returns
+24.
+There are three ways to create a QFontInfo object.
+\list 1
+\o Calling the QFontInfo constructor with a QFont creates a font
+info object for a screen-compatible font, i.e. the font cannot be
+a printer font. If the font is changed later, the font
+info object is \e not updated.
+(Note: If you use a printer font the values returned may be
+inaccurate. Printer fonts are not always accessible so the nearest
+screen font is used if a printer font is supplied.)
+\o QWidget::fontInfo() returns the font info for a widget's font.
+This is equivalent to calling QFontInfo(widget->font()). If the
+widget's font is changed later, the font info object is \e not
+updated.
+\o QPainter::fontInfo() returns the font info for a painter's
+current font. If the painter's font is changed later, the font
+info object is \e not updated.
+\endlist
+\sa QFont QFontMetrics QFontDatabase
+*/
+/*!
+Constructs a font info object for \a font.
+The font must be screen-compatible, i.e. a font you use when
+drawing text in \link QWidget widgets\endlink or \link QPixmap
+pixmaps\endlink, not QPicture or QPrinter.
+The font info object holds the information for the font that is
+passed in the constructor at the time it is created, and is not
+updated if the font's attributes are changed later.
+Use QPainter::fontInfo() to get the font info when painting.
+This will give correct results also when painting on paint device
+that is not screen-compatible.
+*/
+QFontInfo::QFontInfo(const QFont &font)
+: d(font.d.data())
+{ d->ref.ref(); }
+/*!
+Constructs a copy of \a fi.
+*/
+QFontInfo::QFontInfo(const QFontInfo &fi)
+: d(fi.d)
+{ d->ref.ref(); }
+/*!
+Destroys the font info object.
+*/
+QFontInfo::~QFontInfo()
+{
+if (!d->ref.deref())
+delete d;
+}
+/*!
+Assigns the font info in \a fi.
+*/
+QFontInfo &QFontInfo::operator=(const QFontInfo &fi)
+{
+qAtomicAssign(d, fi.d);
+return *this;
+}
+/*!
+Returns the family name of the matched window system font.
+\sa QFont::family()
+*/
+QString QFontInfo::family() const
+{
+QFontEngine *engine = d->engineForScript(QUnicodeTables::Common);
+Q_ASSERT(engine != 0);
+return engine->fontDef.family;
+}
+/*!
+Returns the point size of the matched window system font.
+\sa pointSizeF() QFont::pointSize()
+*/
+int QFontInfo::pointSize() const
+{
+QFontEngine *engine = d->engineForScript(QUnicodeTables::Common);
+Q_ASSERT(engine != 0);
+return qRound(engine->fontDef.pointSize);
+}
+/*!
+Returns the point size of the matched window system font.
+\sa QFont::pointSizeF()
+*/
+qreal QFontInfo::pointSizeF() const
+{
+QFontEngine *engine = d->engineForScript(QUnicodeTables::Common);
+Q_ASSERT(engine != 0);
+return engine->fontDef.pointSize;
+}
+/*!
+Returns the pixel size of the matched window system font.
+\sa QFont::pointSize()
+*/
+int QFontInfo::pixelSize() const
+{
+QFontEngine *engine = d->engineForScript(QUnicodeTables::Common);
+Q_ASSERT(engine != 0);
+return engine->fontDef.pixelSize;
+}
+/*!
+Returns the italic value of the matched window system font.
+\sa QFont::italic()
+*/
+bool QFontInfo::italic() const
+{
+QFontEngine *engine = d->engineForScript(QUnicodeTables::Common);
+Q_ASSERT(engine != 0);
+return engine->fontDef.style != QFont::StyleNormal;
+}
+/*!
+Returns the style value of the matched window system font.
+\sa QFont::style()
+*/
+QFont::Style QFontInfo::style() const
+{
+QFontEngine *engine = d->engineForScript(QUnicodeTables::Common);
+Q_ASSERT(engine != 0);
+return (QFont::Style)engine->fontDef.style;
+}
+/*!
+Returns the weight of the matched window system font.
+\sa QFont::weight(), bold()
+*/
+int QFontInfo::weight() const
+{
+QFontEngine *engine = d->engineForScript(QUnicodeTables::Common);
+Q_ASSERT(engine != 0);
+return engine->fontDef.weight;
+}
+/*!
+\fn bool QFontInfo::bold() const
+Returns true if weight() would return a value greater than
+QFont::Normal; otherwise returns false.
+\sa weight(), QFont::bold()
+*/
+/*!
+Returns the underline value of the matched window system font.
+\sa QFont::underline()
+\internal
+Here we read the underline flag directly from the QFont.
+This is OK for X11 and for Windows because we always get what we want.
+*/
+bool QFontInfo::underline() const
+{
+return d->underline;
+}
+/*!
+Returns the overline value of the matched window system font.
+\sa QFont::overline()
+\internal
+Here we read the overline flag directly from the QFont.
+This is OK for X11 and for Windows because we always get what we want.
+*/
+bool QFontInfo::overline() const
+{
+return d->overline;
+}
+/*!
+Returns the strikeout value of the matched window system font.
+\sa QFont::strikeOut()
+\internal Here we read the strikeOut flag directly from the QFont.
+This is OK for X11 and for Windows because we always get what we want.
+*/
+bool QFontInfo::strikeOut() const
+{
+return d->strikeOut;
+}
+/*!
+Returns the fixed pitch value of the matched window system font.
+\sa QFont::fixedPitch()
+*/
+bool QFontInfo::fixedPitch() const
+{
+QFontEngine *engine = d->engineForScript(QUnicodeTables::Common);
+Q_ASSERT(engine != 0);
+#ifdef Q_OS_MAC
+if (!engine->fontDef.fixedPitchComputed) {
+QChar ch[2] = { QLatin1Char('i'), QLatin1Char('m') };
+QGlyphLayoutArray<2> g;
+int l = 2;
+engine->stringToCMap(ch, 2, &g, &l, 0);
+engine->fontDef.fixedPitch = g.advances_x[0] == g.advances_x[1];
+engine->fontDef.fixedPitchComputed = true;
+}
+#endif
+return engine->fontDef.fixedPitch;
+}
+/*!
+Returns the style of the matched window system font.
+Currently only returns the style hint set in QFont.
+\sa QFont::styleHint() QFont::StyleHint
+*/
+QFont::StyleHint QFontInfo::styleHint() const
+{
+QFontEngine *engine = d->engineForScript(QUnicodeTables::Common);
+Q_ASSERT(engine != 0);
+return (QFont::StyleHint) engine->fontDef.styleHint;
+}
+/*!
+Returns true if the font is a raw mode font; otherwise returns
+false.
+If it is a raw mode font, all other functions in QFontInfo will
+return the same values set in the QFont, regardless of the font
+actually used.
+\sa QFont::rawMode()
+*/
+bool QFontInfo::rawMode() const
+{
+return d->rawMode;
+}
+/*!
+Returns true if the matched window system font is exactly the same
+as the one specified by the font; otherwise returns false.
+\sa QFont::exactMatch()
+*/
+bool QFontInfo::exactMatch() const
+{
+QFontEngine *engine = d->engineForScript(QUnicodeTables::Common);
+Q_ASSERT(engine != 0);
+return (d->rawMode
+? engine->type() != QFontEngine::Box
+: d->request.exactMatch(engine->fontDef));
+}
+// **********************************************************************
+// QFontCache
+// **********************************************************************
+#ifdef QFONTCACHE_DEBUG
+// fast timeouts for debugging
+static const int fast_timeout =   1000;  // 1s
+static const int slow_timeout =   5000;  // 5s
+#else
+static const int fast_timeout =  10000; // 10s
+static const int slow_timeout = 300000; //  5m
+#endif // QFONTCACHE_DEBUG
+const uint QFontCache::min_cost = 4*1024; // 4mb
+#ifdef QT_NO_THREAD
+Q_GLOBAL_STATIC(QFontCache, theFontCache)
+QFontCache *QFontCache::instance()
+{
+return theFontCache();
+}
+void QFontCache::cleanup()
+{
+}
+#else
+Q_GLOBAL_STATIC(QThreadStorage<QFontCache *>, theFontCache)
+QFontCache *QFontCache::instance()
+{
+QFontCache *&fontCache = theFontCache()->localData();
+if (!fontCache)
+fontCache = new QFontCache;
+return fontCache;
+}
+void QFontCache::cleanup()
+{
+QThreadStorage<QFontCache *> *cache = 0;
+QT_TRY {
+cache = theFontCache();
+} QT_CATCH (const std::bad_alloc &) {
+// no cache - just ignore
+}
+if (cache && cache->hasLocalData())
+cache->setLocalData(0);
+}
+#endif // QT_NO_THREAD
+QFontCache::QFontCache()
+: QObject(), total_cost(0), max_cost(min_cost),
+current_timestamp(0), fast(false), timer_id(-1)
+{
+}
+QFontCache::~QFontCache()
+{
+{
+EngineDataCache::ConstIterator it = engineDataCache.constBegin(),
+end = engineDataCache.constEnd();
+while (it != end) {
+if (it.value()->ref == 0)
+delete it.value();
+else
+FC_DEBUG("QFontCache::~QFontCache: engineData %p still has refcount %d",
+it.value(), int(it.value()->ref));
+++it;
+}
+}
+EngineCache::ConstIterator it = engineCache.constBegin(),
+end = engineCache.constEnd();
+while (it != end) {
+if (--it.value().data->cache_count == 0) {
+if (it.value().data->ref == 0) {
+FC_DEBUG("QFontCache::~QFontCache: deleting engine %p key=(%d / %g %d %d %d %d)",
+it.value().data, it.key().script, it.key().def.pointSize,
+it.key().def.pixelSize, it.key().def.weight, it.key().def.style,
+it.key().def.fixedPitch);
+delete it.value().data;
+} else {
+FC_DEBUG("QFontCache::~QFontCache: engine = %p still has refcount %d",
+it.value().data, int(it.value().data->ref));
+}
+}
+++it;
+}
+}
+void QFontCache::clear()
+{
+{
+EngineDataCache::Iterator it = engineDataCache.begin(),
+end = engineDataCache.end();
+while (it != end) {
+QFontEngineData *data = it.value();
+#if !defined(Q_WS_MAC)
+for (int i = 0; i < QUnicodeTables::ScriptCount; ++i) {
+if (data->engines[i]) {
+data->engines[i]->ref.deref();
+data->engines[i] = 0;
+}
+}
+#else
+if (data->engine) {
+data->engine->ref.deref();
+data->engine = 0;
+}
+#endif
+++it;
+}
+}
+for (EngineCache::Iterator it = engineCache.begin(), end = engineCache.end();
+it != end; ++it) {
+if (it->data->ref == 0) {
+delete it->data;
+it->data = 0;
+}
+}
+for (EngineCache::Iterator it = engineCache.begin(), end = engineCache.end();
+it != end; ++it) {
+if (it->data && it->data->ref == 0) {
+delete it->data;
+it->data = 0;
+}
+}
+engineCache.clear();
+}
+#if defined(Q_WS_QWS) && !defined(QT_NO_QWS_QPF2)
+void QFontCache::removeEngineForFont(const QByteArray &_fontName)
+{
+/* This could be optimized but the code becomes much more complex if we want to handle multi
+* font engines and it is probably not worth it. Therefore we just clear the entire font cache.
+*/
+Q_UNUSED(_fontName);
+clear();
+}
+#endif
+QFontEngineData *QFontCache::findEngineData(const Key &key) const
+{
+EngineDataCache::ConstIterator it = engineDataCache.find(key),
+end = engineDataCache.end();
+if (it == end) return 0;
+// found
+return it.value();
+}
+void QFontCache::insertEngineData(const Key &key, QFontEngineData *engineData)
+{
+FC_DEBUG("QFontCache: inserting new engine data %p", engineData);
+engineDataCache.insert(key, engineData);
+increaseCost(sizeof(QFontEngineData));
+}
+QFontEngine *QFontCache::findEngine(const Key &key)
+{
+EngineCache::Iterator it = engineCache.find(key),
+end = engineCache.end();
+if (it == end) return 0;
+// found... update the hitcount and timestamp
+it.value().hits++;
+it.value().timestamp = ++current_timestamp;
+FC_DEBUG("QFontCache: found font engine\n"
+"  %p: timestamp %4u hits %3u ref %2d/%2d, type '%s'",
+it.value().data, it.value().timestamp, it.value().hits,
+int(it.value().data->ref), it.value().data->cache_count,
+it.value().data->name());
+return it.value().data;
+}
+void QFontCache::insertEngine(const Key &key, QFontEngine *engine)
+{
+FC_DEBUG("QFontCache: inserting new engine %p", engine);
+Engine data(engine);
+data.timestamp = ++current_timestamp;
+engineCache.insert(key, data);
+// only increase the cost if this is the first time we insert the engine
+if (engine->cache_count == 0)
+increaseCost(engine->cache_cost);
+++engine->cache_count;
+}
+void QFontCache::increaseCost(uint cost)
+{
+cost = (cost + 512) / 1024; // store cost in kb
+cost = cost > 0 ? cost : 1;
+total_cost += cost;
+FC_DEBUG("  COST: increased %u kb, total_cost %u kb, max_cost %u kb",
+cost, total_cost, max_cost);
+if (total_cost > max_cost) {
+max_cost = total_cost;
+if (timer_id == -1 || ! fast) {
+FC_DEBUG("  TIMER: starting fast timer (%d ms)", fast_timeout);
+if (timer_id != -1) killTimer(timer_id);
+timer_id = startTimer(fast_timeout);
+fast = true;
+}
+}
+}
+void QFontCache::decreaseCost(uint cost)
+{
+cost = (cost + 512) / 1024; // cost is stored in kb
+cost = cost > 0 ? cost : 1;
+Q_ASSERT(cost <= total_cost);
+total_cost -= cost;
+FC_DEBUG("  COST: decreased %u kb, total_cost %u kb, max_cost %u kb",
+cost, total_cost, max_cost);
+}
+#if defined(Q_WS_WIN) || defined (Q_WS_QWS)
+void QFontCache::cleanupPrinterFonts()
+{
+FC_DEBUG("QFontCache::cleanupPrinterFonts");
+{
+FC_DEBUG("  CLEAN engine data:");
+// clean out all unused engine data
+EngineDataCache::Iterator it = engineDataCache.begin(),
+end = engineDataCache.end();
+while (it != end) {
+if (it.key().screen == 0) {
+++it;
+continue;
+}
+if(it.value()->ref != 0) {
+for(int i = 0; i < QUnicodeTables::ScriptCount; ++i) {
+if(it.value()->engines[i]) {
+it.value()->engines[i]->ref.deref();
+it.value()->engines[i] = 0;
+}
+}
+++it;
+} else {
+EngineDataCache::Iterator rem = it++;
+decreaseCost(sizeof(QFontEngineData));
+FC_DEBUG("    %p", rem.value());
+delete rem.value();
+engineDataCache.erase(rem);
+}
+}
+}
+EngineCache::Iterator it = engineCache.begin(),
+end = engineCache.end();
+while(it != end) {
+if (it.value().data->ref != 0 || it.key().screen == 0) {
+++it;
+continue;
+}
+FC_DEBUG("    %p: timestamp %4u hits %2u ref %2d/%2d, type '%s'",
+it.value().data, it.value().timestamp, it.value().hits,
+int(it.value().data->ref), it.value().data->cache_count,
+it.value().data->name());
+if (--it.value().data->cache_count == 0) {
+FC_DEBUG("    DELETE: last occurrence in cache");
+decreaseCost(it.value().data->cache_cost);
+delete it.value().data;
+}
+engineCache.erase(it++);
+}
+}
+#endif
+void QFontCache::timerEvent(QTimerEvent *)
+{
+FC_DEBUG("QFontCache::timerEvent: performing cache maintenance (timestamp %u)",
+current_timestamp);
+if (total_cost <= max_cost && max_cost <= min_cost) {
+FC_DEBUG("  cache redused sufficiently, stopping timer");
+killTimer(timer_id);
+timer_id = -1;
+fast = false;
+return;
+}
+// go through the cache and count up everything in use
+uint in_use_cost = 0;
+{
+FC_DEBUG("  SWEEP engine data:");
+// make sure the cost of each engine data is at least 1kb
+const uint engine_data_cost =
+sizeof(QFontEngineData) > 1024 ? sizeof(QFontEngineData) : 1024;
+EngineDataCache::ConstIterator it = engineDataCache.constBegin(),
+end = engineDataCache.constEnd();
+for (; it != end; ++it) {
+#ifdef QFONTCACHE_DEBUG
+FC_DEBUG("    %p: ref %2d", it.value(), int(it.value()->ref));
+#  if defined(Q_WS_X11) || defined(Q_WS_WIN)
+// print out all engines
+for (int i = 0; i < QUnicodeTables::ScriptCount; ++i) {
+if (! it.value()->engines[i])
+continue;
+FC_DEBUG("      contains %p", it.value()->engines[i]);
+}
+#  endif // Q_WS_X11 || Q_WS_WIN
+#endif // QFONTCACHE_DEBUG
+if (it.value()->ref != 0)
+in_use_cost += engine_data_cost;
+}
+}
+{
+FC_DEBUG("  SWEEP engine:");
+EngineCache::ConstIterator it = engineCache.constBegin(),
+end = engineCache.constEnd();
+for (; it != end; ++it) {
+FC_DEBUG("    %p: timestamp %4u hits %2u ref %2d/%2d, cost %u bytes",
+it.value().data, it.value().timestamp, it.value().hits,
+int(it.value().data->ref), it.value().data->cache_count,
+it.value().data->cache_cost);
+if (it.value().data->ref != 0)
+in_use_cost += it.value().data->cache_cost / it.value().data->cache_count;
+}
+// attempt to make up for rounding errors
+in_use_cost += engineCache.size();
+}
+in_use_cost = (in_use_cost + 512) / 1024; // cost is stored in kb
+/*
+calculate the new maximum cost for the cache
+NOTE: in_use_cost is *not* correct due to rounding errors in the
+above algorithm.  instead of worrying about getting the
+calculation correct, we are more interested in speed, and use
+in_use_cost as a floor for new_max_cost
+*/
+uint new_max_cost = qMax(qMax(max_cost / 2, in_use_cost), min_cost);
+FC_DEBUG("  after sweep, in use %u kb, total %u kb, max %u kb, new max %u kb",
+in_use_cost, total_cost, max_cost, new_max_cost);
+if (new_max_cost == max_cost) {
+if (fast) {
+FC_DEBUG("  cannot shrink cache, slowing timer");
+killTimer(timer_id);
+timer_id = startTimer(slow_timeout);
+fast = false;
+}
+return;
+} else if (! fast) {
+FC_DEBUG("  dropping into passing gear");
+killTimer(timer_id);
+timer_id = startTimer(fast_timeout);
+fast = true;
+}
+max_cost = new_max_cost;
+{
+FC_DEBUG("  CLEAN engine data:");
+// clean out all unused engine data
+EngineDataCache::Iterator it = engineDataCache.begin(),
+end = engineDataCache.end();
+while (it != end) {
+if (it.value()->ref != 0) {
+++it;
+continue;
+}
+EngineDataCache::Iterator rem = it++;
+decreaseCost(sizeof(QFontEngineData));
+FC_DEBUG("    %p", rem.value());
+delete rem.value();
+engineDataCache.erase(rem);
+}
+}
+// clean out the engine cache just enough to get below our new max cost
+uint current_cost;
+do {
+current_cost = total_cost;
+EngineCache::Iterator it = engineCache.begin(),
+end = engineCache.end();
+// determine the oldest and least popular of the unused engines
+uint oldest = ~0u;
+uint least_popular = ~0u;
+for (; it != end; ++it) {
+if (it.value().data->ref != 0)
+continue;
+if (it.value().timestamp < oldest &&
+it.value().hits <= least_popular) {
+oldest = it.value().timestamp;
+least_popular = it.value().hits;
+}
+}
+FC_DEBUG("    oldest %u least popular %u", oldest, least_popular);
+for (it = engineCache.begin(); it != end; ++it) {
+if (it.value().data->ref == 0 &&
+it.value().timestamp == oldest &&
+it.value().hits == least_popular)
+break;
+}
+if (it != end) {
+FC_DEBUG("    %p: timestamp %4u hits %2u ref %2d/%2d, type '%s'",
+it.value().data, it.value().timestamp, it.value().hits,
+int(it.value().data->ref), it.value().data->cache_count,
+it.value().data->name());
+if (--it.value().data->cache_count == 0) {
+FC_DEBUG("    DELETE: last occurrence in cache");
+decreaseCost(it.value().data->cache_cost);
+delete it.value().data;
+} else {
+/*
+this particular font engine is in the cache multiple
+times...  set current_cost to zero, so that we can
+keep looping to get rid of all occurrences
+*/
+current_cost = 0;
+}
+engineCache.erase(it);
+}
+} while (current_cost != total_cost && total_cost > max_cost);
+}
+#ifndef QT_NO_DEBUG_STREAM
+QDebug operator<<(QDebug stream, const QFont &font)
+{
+return stream << "QFont(" << font.toString() << ')';
+}
+#endif
+QT_END_NAMESPACE

changeset 0	1918ee327afb
child 3	41300fa6a67c