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This is the verbatim text of the qfontmanager_qws.h include file. It is provided only for illustration; the copyright remains with Trolltech.
/****************************************************************************
** $Id: qt/qfontmanager_qws.h 3.3.8 edited Jan 11 14:38 $
**
** Definition of font rendering infrastructure for Embedded TQt
**
** Created : 940721
**
** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
**
** This file is part of the kernel module of the TQt GUI Toolkit.
**
** This file may be used under the terms of the GNU General Public
** License versions 2.0 or 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Alternatively you may (at your option) use any
** later version of the GNU General Public License if such license has
** been publicly approved by Trolltech ASA (or its successors, if any)
** and the KDE Free TQt Foundation.
**
** Please review the following information to ensure GNU General
** Public Licensing requirements will be met:
** http://trolltech.com/products/qt/licenses/licensing/opensource/.
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
** or contact the sales department at sales@trolltech.com.
**
** Licensees holding valid TQt Commercial licenses may use this file in
** accordance with the TQt Commercial License Agreement provided with
** the Software.
**
** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
** herein.
**
**********************************************************************/
#ifndef TQFONTMANAGER_QWS_H
#define TQFONTMANAGER_QWS_H
#ifndef QT_H
#include "qfont.h"
#include "qptrlist.h"
#include <private/qtextengine_p.h>
#endif // QT_H
// These are stored in the shared memory segment in front of their
// data, and indexed at the start of the segment
// This needs to be a multiple of 64 bits
class TQFontDef;
class Q_PACKED TQGlyphMetrics {
public:
Q_UINT8 linestep;
Q_UINT8 width;
Q_UINT8 height;
Q_UINT8 flags;
Q_INT8 bearingx; // Difference from pen position to glyph's left bbox
Q_UINT8 advance; // Difference between pen positions
Q_INT8 bearingy; // Used for putting characters on baseline
Q_INT8 reserved; // Do not use
// Flags:
// RendererOwnsData - the renderer is responsible for glyph data
// memory deletion otherwise TQGlyphTree must
// delete [] the data when the glyph is deleted.
enum Flags { RendererOwnsData=0x01 };
};
class TQGlyph {
public:
TQGlyph() { metrics=0; data=0; }
TQGlyph(TQGlyphMetrics* m, uchar* d) :
metrics(m), data(d) { }
~TQGlyph() {}
TQGlyphMetrics* metrics;
uchar* data;
};
class TQFontFactory;
class TQDiskFont;
// This is a particular font instance at a particular resolution
// e.g. Truetype Times, 10 point. There's only one of these though;
// we want to share generated glyphs
class TQRenderedFont {
public:
// Normal font-type is monochrome; glyph data is a
// bitmap, which doesn't use much memory
// Initialise for name A, renderer B, font type C, D glyphs
TQRenderedFont(TQDiskFont *,const TQFontDef&);
virtual ~TQRenderedFont();
TQFontDef fontDef() const;
int refcount;
int ptsize;
bool italic;
unsigned int weight;
void ref() { refcount++; }
bool deref() { refcount--; return refcount==0; }
bool match(const TQFontDef &);
TQDiskFont* diskfont;
int fascent,fdescent;
int fleftbearing,frightbearing;
int fmaxwidth;
int fleading;
int funderlinepos;
int funderlinewidth;
bool smooth;
int maxchar;
int ascent() { return fascent; }
int descent() { return fdescent; }
int width(int);
int width( const TQString&, int =-1 );
int leftBearing(int);
int rightBearing(int);
// Calling any of these can trigger a full-font metrics check
// which can be expensive
int minLeftBearing();
int minRightBearing();
int maxWidth();
virtual bool inFont(glyph_t g) const=0;
virtual TQGlyph render(glyph_t g)=0;
private:
};
// Keeps track of available renderers and which font is which
class TQDiskFontPrivate {};
class TQDiskFont {
public:
TQDiskFont(TQFontFactory *f, const TQString& n, bool i, int w, int s,
const TQString &fl, const TQString& fi) :
factory(f), name(n), italic(i), weight(w), size(s), flags(fl), file(fi)
{
loaded=FALSE;
p=0;
}
TQRenderedFont* load(const TQFontDef &);
TQFontDef fontDef() const;
TQFontFactory *factory;
TQString name;
bool italic;
int weight;
int size;
TQString flags;
TQString file;
bool loaded;
TQDiskFontPrivate * p;
};
class TQCachePolicy {
public:
virtual void cache(TQRenderedFont *)=0;
virtual void uncache(TQRenderedFont *)=0;
};
// Exposed here so the default policy can be reset
class TQDefaultCachePolicy : public TQCachePolicy {
public:
virtual void cache(TQRenderedFont *);
virtual void uncache(TQRenderedFont *);
};
class TQFontManager {
public:
TQPtrList<TQFontFactory> factories;
TQPtrList<TQRenderedFont> cachedfonts;
TQPtrList<TQDiskFont> diskfonts;
TQFontManager();
~TQFontManager();
// Font definition, type and color
TQDiskFont * get(const TQFontDef &);
static int cmpFontDef(const TQFontDef & goal, const TQFontDef & choice);
static void initialize();
static void cleanup();
void setPolicy(TQCachePolicy *);
void cache(TQRenderedFont * f) { policy->cache(f); }
void uncache(TQRenderedFont * f) { policy->uncache(f); }
TQRenderedFont * getCached(const TQFontDef &);
private:
TQCachePolicy * policy;
};
class TQFontFactory {
public:
TQFontFactory() {}
virtual ~TQFontFactory() {}
virtual TQRenderedFont * get(const TQFontDef &,TQDiskFont *)=0;
virtual void load(TQDiskFont *) const=0;
virtual void unload(TQDiskFont *) {}
virtual TQString name()=0;
};
void qt_init_fonts();
extern TQFontManager * qt_fontmanager;
#endif
| Copyright © 2007 Trolltech | Trademarks | TQt 3.3.8
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