--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/gui/text/qfont.cpp Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,3042 @@
+/****************************************************************************
+**
+** 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