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279 lines
7.4 KiB
279 lines
7.4 KiB
13 years ago
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/****************************************************************************
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**
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** Definition of internal QFontData struct
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**
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** Created : 941229
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**
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** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
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**
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** This file is part of the kernel module of the Qt GUI Toolkit.
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**
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** This file may be used under the terms of the GNU General
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** Public License versions 2.0 or 3.0 as published by the Free
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** Software Foundation and appearing in the files LICENSE.GPL2
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** and LICENSE.GPL3 included in the packaging of this file.
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** Alternatively you may (at your option) use any later version
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** of the GNU General Public License if such license has been
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** publicly approved by Trolltech ASA (or its successors, if any)
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** and the KDE Free Qt Foundation.
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**
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** Please review the following information to ensure GNU General
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** Public Licensing requirements will be met:
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** http://trolltech.com/products/qt/licenses/licensing/opensource/.
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** If you are unsure which license is appropriate for your use, please
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** review the following information:
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** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
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** or contact the sales department at sales@trolltech.com.
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**
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** This file may be used under the terms of the Q Public License as
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** defined by Trolltech ASA and appearing in the file LICENSE.QPL
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** included in the packaging of this file. Licensees holding valid Qt
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** Commercial licenses may use this file in accordance with the Qt
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** Commercial License Agreement provided with the Software.
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**
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** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
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** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
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** herein.
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**
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**********************************************************************/
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#ifndef QFONTDATA_P_H
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#define QFONTDATA_P_H
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//
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// W A R N I N G
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// -------------
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//
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// This file is not part of the Qt API. It exists for the convenience
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// of internal files. This header file may change from version to version
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// without notice, or even be removed.
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//
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// We mean it.
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//
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//
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#include "qobject.h"
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#include "qfont.h"
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#include "qpaintdevicemetrics.h"
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// forwards
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class QFontEngine;
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class QPaintDevice;
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struct QFontDef
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{
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inline QFontDef()
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: pointSize( -1 ), pixelSize( -1 ),
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styleHint( QFont::AnyStyle ), styleStrategy( QFont::PreferDefault ),
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weight( 50 ), italic( FALSE ), fixedPitch( FALSE ), stretch( 100 ),
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ignorePitch(TRUE)
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#ifdef Q_WS_MAC
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,fixedPitchComputed(FALSE)
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#endif
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{
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}
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QString family;
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#ifdef Q_WS_X11
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QString addStyle;
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#endif // Q_WS_X11
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int pointSize;
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int pixelSize;
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uint styleHint : 8;
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uint styleStrategy : 16;
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uint weight : 7; // 0-99
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uint italic : 1;
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uint fixedPitch : 1;
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uint stretch : 12; // 0-400
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uint ignorePitch : 1;
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uint fixedPitchComputed : 1; // for Mac OS X only
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uint reserved : 14; // for future extensions
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bool operator==( const QFontDef &other ) const;
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inline bool operator<( const QFontDef &other ) const
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{
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if ( pixelSize != other.pixelSize ) return pixelSize < other.pixelSize;
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if ( weight != other.weight ) return weight < other.weight;
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if ( italic != other.italic ) return italic < other.italic;
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if ( stretch != other.stretch ) return stretch < other.stretch;
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if ( styleHint != other.styleHint ) return styleHint < other.styleHint;
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if ( styleStrategy != other.styleStrategy ) return styleStrategy < other.styleStrategy;
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if ( family != other.family ) return family < other.family;
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#ifdef Q_WS_X11
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if ( addStyle != other.addStyle ) return addStyle < other.addStyle;
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#endif // Q_WS_X11
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return FALSE;
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}
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};
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class QFontEngineData : public QShared
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{
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public:
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QFontEngineData();
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~QFontEngineData();
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uint lineWidth;
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#if defined(Q_WS_X11) || defined(Q_WS_WIN)
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QFontEngine *engines[QFont::LastPrivateScript];
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#else
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QFontEngine *engine;
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#endif // Q_WS_X11 || Q_WS_WIN
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#ifndef Q_WS_MAC
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enum { widthCacheSize = 0x500 };
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uchar widthCache[widthCacheSize];
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#endif
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};
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class QFontPrivate : public QShared
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{
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public:
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static QFont::Script defaultScript;
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#ifdef Q_WS_X11
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static int defaultEncodingID;
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#endif // Q_WS_X11
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QFontPrivate();
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QFontPrivate( const QFontPrivate &other );
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~QFontPrivate();
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void load( QFont::Script script );
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QFontEngine *engineForScript( QFont::Script script ) const {
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if ( script == QFont::NoScript )
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script = QFontPrivate::defaultScript;
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#if defined(Q_WS_X11) || defined(Q_WS_WIN)
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if ( ! engineData || ! engineData->engines[script] )
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((QFontPrivate *) this)->load( script );
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return engineData->engines[script];
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#else
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if ( ! engineData || ! engineData->engine )
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((QFontPrivate *) this)->load( script );
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return engineData->engine;
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#endif // Q_WS_X11 || Q_WS_WIN
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}
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QFontDef request;
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QFontEngineData *engineData;
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QPaintDevice *paintdevice;
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int screen;
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uint rawMode : 1;
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uint underline : 1;
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uint overline : 1;
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uint strikeOut : 1;
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enum {
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Family = 0x0001,
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Size = 0x0002,
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StyleHint = 0x0004,
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StyleStrategy = 0x0008,
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Weight = 0x0010,
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Italic = 0x0020,
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Underline = 0x0040,
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Overline = 0x0080,
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StrikeOut = 0x0100,
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FixedPitch = 0x0200,
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Stretch = 0x0400,
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Complete = 0x07ff
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};
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uint mask;
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void resolve( const QFontPrivate *other );
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};
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class QFontCache : public QObject
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{
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public:
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static QFontCache *instance;
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QFontCache();
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~QFontCache();
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#ifdef Q_WS_QWS
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void clear();
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#endif
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// universal key structure. QFontEngineDatas and QFontEngines are cached using
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// the same keys
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struct Key {
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Key() : script(0), screen( 0 ), dpi(0) { }
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Key( const QFontDef &d, QFont::Script c, int s, QPaintDevice *pdev )
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: script(c), screen(s) {
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def = d;
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#ifdef Q_WS_X11
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dpi = pdev ? QPaintDeviceMetrics(pdev).logicalDpiY() : 0;
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#else
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Q_UNUSED(pdev);
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dpi = 0;
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#endif
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}
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QFontDef def;
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int script;
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int screen;
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int dpi;
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inline bool operator<( const Key &other ) const
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{
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if ( script != other.script ) return script < other.script;
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if ( screen != other.screen ) return screen < other.screen;
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if ( dpi != other.dpi ) return dpi < other.dpi;
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return def < other.def;
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}
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inline bool operator==( const Key &other ) const
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{ return def == other.def && script == other.script &&
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screen == other.screen && dpi == other.dpi; }
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};
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// QFontEngineData cache
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typedef QMap<Key,QFontEngineData*> EngineDataCache;
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EngineDataCache engineDataCache;
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QFontEngineData *findEngineData( const Key &key ) const;
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void insertEngineData( const Key &key, QFontEngineData *engineData );
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// QFontEngine cache
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struct Engine {
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Engine() : data( 0 ), timestamp( 0 ), hits( 0 ) { }
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Engine( QFontEngine *d ) : data( d ), timestamp( 0 ), hits( 0 ) { }
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QFontEngine *data;
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uint timestamp;
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uint hits;
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};
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typedef QMap<Key,Engine> EngineCache;
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EngineCache engineCache;
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QFontEngine *findEngine( const Key &key );
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void insertEngine( const Key &key, QFontEngine *engine );
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#if defined(Q_WS_WIN) || defined(Q_WS_QWS)
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void cleanupPrinterFonts();
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#endif
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private:
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void increaseCost( uint cost );
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void decreaseCost( uint cost );
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void timerEvent( QTimerEvent *event );
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static const uint min_cost;
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uint total_cost, max_cost;
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uint current_timestamp;
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bool fast;
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int timer_id;
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};
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#endif // QFONTDATA_P_H
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