source: trunk/doc/html/qfontmanager_qws-h.html@ 208

Last change on this file since 208 was 190, checked in by rudi, 14 years ago

reference documentation added
File size: 7.7 KB
Line 
1<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
2<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/include/qfontmanager_qws.h:1 -->
3<html>
4<head>
5<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
6<title>qfontmanager_qws.h Include File</title>
7<style type="text/css"><!--
8fn { margin-left: 1cm; text-indent: -1cm; }
9a:link { color: #004faf; text-decoration: none }
10a:visited { color: #672967; text-decoration: none }
11body { background: #ffffff; color: black; }
12--></style>
13</head>
14<body>
15
16<table border="0" cellpadding="0" cellspacing="0" width="100%">
17<tr bgcolor="#E5E5E5">
18<td valign=center>
19 <a href="index.html">
20<font color="#004faf">Home</font></a>
21 | <a href="classes.html">
22<font color="#004faf">All&nbsp;Classes</font></a>
23 | <a href="mainclasses.html">
24<font color="#004faf">Main&nbsp;Classes</font></a>
25 | <a href="annotated.html">
26<font color="#004faf">Annotated</font></a>
27 | <a href="groups.html">
28<font color="#004faf">Grouped&nbsp;Classes</font></a>
29 | <a href="functions.html">
30<font color="#004faf">Functions</font></a>
31</td>
32<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>qfontmanager_qws.h</h1>
33
34<p>This is the verbatim text of the qfontmanager_qws.h include file. It is provided only for illustration; the copyright remains with Trolltech.
35<hr>
36<pre>
37/****************************************************************************
38** $Id: qfontmanager_qws-h.html 2051 2007-02-21 10:04:20Z chehrlic $
39**
40** Definition of font rendering infrastructure for Embedded Qt
41**
42** Created : 940721
43**
44** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
45**
46** This file is part of the kernel module of the Qt GUI Toolkit.
47**
48** This file may be distributed and/or modified under the terms of the
49** GNU General Public License version 2 as published by the Free Software
50** Foundation and appearing in the file LICENSE.GPL included in the
51** packaging of this file.
52**
53** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
54** licenses for Qt/Embedded may use this file in accordance with the
55** Qt Embedded Commercial License Agreement provided with the Software.
56**
57** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
58** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
59**
60** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
61** information about Qt Commercial License Agreements.
62** See http://www.trolltech.com/gpl/ for GPL licensing information.
63**
64** Contact info@trolltech.com if any conditions of this licensing are
65** not clear to you.
66**
67**********************************************************************/
68
69#ifndef QFONTMANAGER_QWS_H
70#define QFONTMANAGER_QWS_H
71
72#ifndef QT_H
73#include "qfont.h"
74#include "qptrlist.h"
75#include &lt;private/qtextengine_p.h&gt;
76#endif // QT_H
77
78// These are stored in the shared memory segment in front of their
79// data, and indexed at the start of the segment
80
81// This needs to be a multiple of 64 bits
82
83class QFontDef;
84
85class Q_PACKED QGlyphMetrics {
86
87public:
88 Q_UINT8 linestep;
89 Q_UINT8 width;
90 Q_UINT8 height;
91 Q_UINT8 flags;
92
93 Q_INT8 bearingx; // Difference from pen position to glyph's left bbox
94 Q_UINT8 advance; // Difference between pen positions
95 Q_INT8 bearingy; // Used for putting characters on baseline
96
97 Q_INT8 reserved; // Do not use
98
99 // Flags:
100 // RendererOwnsData - the renderer is responsible for glyph data
101 // memory deletion otherwise QGlyphTree must
102 // delete [] the data when the glyph is deleted.
103 enum Flags { RendererOwnsData=0x01 };
104};
105
106class QGlyph {
107public:
108 QGlyph() { metrics=0; data=0; }
109 QGlyph(QGlyphMetrics* m, uchar* d) :
110 metrics(m), data(d) { }
111 ~QGlyph() {}
112
113 QGlyphMetrics* metrics;
114 uchar* data;
115};
116
117
118
119class QFontFactory;
120class QDiskFont;
121
122// This is a particular font instance at a particular resolution
123// e.g. Truetype Times, 10 point. There's only one of these though;
124// we want to share generated glyphs
125
126class QRenderedFont {
127
128public:
129
130 // Normal font-type is monochrome; glyph data is a
131 // bitmap, which doesn't use much memory
132
133 // Initialise for name A, renderer B, font type C, D glyphs
134
135 QRenderedFont(QDiskFont *,const QFontDef&amp;);
136 virtual ~QRenderedFont();
137
138 QFontDef fontDef() const;
139
140 int refcount;
141
142 int ptsize;
143
144 bool italic;
145 unsigned int weight;
146
147 void ref() { refcount++; }
148 bool deref() { refcount--; return refcount==0; }
149
150 bool match(const QFontDef &amp;);
151
152 QDiskFont* diskfont;
153 int fascent,fdescent;
154 int fleftbearing,frightbearing;
155 int fmaxwidth;
156 int fleading;
157 int funderlinepos;
158 int funderlinewidth;
159 bool smooth;
160 int maxchar;
161
162 int ascent() { return fascent; }
163 int descent() { return fdescent; }
164 int width(int);
165 int width( const QString&amp;, int =-1 );
166 int leftBearing(int);
167 int rightBearing(int);
168
169 // Calling any of these can trigger a full-font metrics check
170 // which can be expensive
171 int minLeftBearing();
172 int minRightBearing();
173 int maxWidth();
174
175 virtual bool inFont(glyph_t g) const=0;
176 virtual QGlyph render(glyph_t g)=0;
177
178private:
179
180};
181
182// Keeps track of available renderers and which font is which
183
184class QDiskFontPrivate {};
185
186class QDiskFont {
187
188public:
189 QDiskFont(QFontFactory *f, const QString&amp; n, bool i, int w, int s,
190 const QString &amp;fl, const QString&amp; fi) :
191 factory(f), name(n), italic(i), weight(w), size(s), flags(fl), file(fi)
192 {
193 loaded=FALSE;
194 p=0;
195 }
196
197 QRenderedFont* load(const QFontDef &amp;);
198
199 QFontDef fontDef() const;
200
201 QFontFactory *factory;
202 QString name;
203 bool italic;
204 int weight;
205 int size;
206 QString flags;
207 QString file;
208 bool loaded;
209
210 QDiskFontPrivate * p;
211};
212
213class QCachePolicy {
214
215public:
216
217 virtual void cache(QRenderedFont *)=0;
218 virtual void uncache(QRenderedFont *)=0;
219
220};
221
222// Exposed here so the default policy can be reset
223
224class QDefaultCachePolicy : public QCachePolicy {
225
226public:
227
228 virtual void cache(QRenderedFont *);
229 virtual void uncache(QRenderedFont *);
230
231};
232
233class QFontManager {
234
235public:
236
237 QPtrList&lt;QFontFactory&gt; factories;
238 QPtrList&lt;QRenderedFont&gt; cachedfonts;
239 QPtrList&lt;QDiskFont&gt; diskfonts;
240
241 QFontManager();
242 ~QFontManager();
243
244 // Font definition, type and color
245 QDiskFont * get(const QFontDef &amp;);
246
247 static int cmpFontDef(const QFontDef &amp; goal, const QFontDef &amp; choice);
248
249 static void initialize();
250 static void cleanup();
251
252 void setPolicy(QCachePolicy *);
253
254 void cache(QRenderedFont * f) { policy-&gt;cache(f); }
255 void uncache(QRenderedFont * f) { policy-&gt;uncache(f); }
256 QRenderedFont * getCached(const QFontDef &amp;);
257
258private:
259
260 QCachePolicy * policy;
261
262};
263
264class QFontFactory {
265
266public:
267
268 QFontFactory() {}
269 virtual ~QFontFactory() {}
270
271 virtual QRenderedFont * get(const QFontDef &amp;,QDiskFont *)=0;
272 virtual void load(QDiskFont *) const=0;
273 virtual void unload(QDiskFont *) {}
274 virtual QString name()=0;
275};
276
277void qt_init_fonts();
278
279extern QFontManager * qt_fontmanager;
280
281#endif
282</pre>
283<!-- eof -->
284<p><address><hr><div align=center>
285<table width=100% cellspacing=0 border=0><tr>
286<td>Copyright &copy; 2007
287<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
288<td align=right><div align=right>Qt 3.3.8</div>
289</table></div></address></body>
290</html>
Note: See TracBrowser for help on using the repository browser.