1 /****************************************************************************

     2 **

     3 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

     4 ** All rights reserved.

     5 ** Contact: Nokia Corporation (qt-info@nokia.com)

     6 **

     7 ** This file is part of the QtSvg module of the Qt Toolkit.

     8 **

     9 ** $QT_BEGIN_LICENSE:LGPL$

    10 ** No Commercial Usage

    11 ** This file contains pre-release code and may not be distributed.

    12 ** You may use this file in accordance with the terms and conditions

    13 ** contained in the Technology Preview License Agreement accompanying

    14 ** this package.

    15 **

    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

    18 ** General Public License version 2.1 as published by the Free Software

    19 ** Foundation and appearing in the file LICENSE.LGPL included in the

    20 ** packaging of this file.  Please review the following information to

    21 ** ensure the GNU Lesser General Public License version 2.1 requirements

    22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

    23 **

    24 ** In addition, as a special exception, Nokia gives you certain additional

    25 ** rights.  These rights are described in the Nokia Qt LGPL Exception

    26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

    27 **

    28 ** If you have questions regarding the use of this file, please contact

    29 ** Nokia at qt-info@nokia.com.

    30 **

    31 **

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    33 **

    34 **

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    36 **

    37 **

    38 ** $QT_END_LICENSE$

    39 **

    40 ****************************************************************************/

    41 

    42 #include "qsvgfont_p.h"

    43 

    44 #ifndef QT_NO_SVG

    45 

    46 #include "qpainter.h"

    47 #include "qpen.h"

    48 #include "qdebug.h"

    49 #include "qpicture.h"

    50 

    51 QT_BEGIN_NAMESPACE

    52 

    53 QSvgGlyph::QSvgGlyph(QChar unicode, const QPainterPath &path, qreal horizAdvX)

    54     : m_unicode(unicode), m_path(path), m_horizAdvX(horizAdvX)

    55 {

    56 

    57 }

    58 

    59 

    60 QSvgFont::QSvgFont(qreal horizAdvX)

    61     : m_horizAdvX(horizAdvX)

    62 {

    63 }

    64 

    65 

    66 QString QSvgFont::familyName() const

    67 {

    68     return m_familyName;

    69 }

    70 

    71 

    72 void QSvgFont::addGlyph(QChar unicode, const QPainterPath &path, qreal horizAdvX )

    73 {

    74     m_glyphs.insert(unicode, QSvgGlyph(unicode, path,

    75                                        (horizAdvX==-1)?m_horizAdvX:horizAdvX));

    76 }

    77 

    78 

    79 void QSvgFont::draw(QPainter *p, const QPointF &point, const QString &str, qreal pixelSize, Qt::Alignment alignment) const

    80 {

    81     p->save();

    82     p->translate(point);

    83     p->scale(pixelSize / m_unitsPerEm, -pixelSize / m_unitsPerEm);

    84 

    85     // Calculate the text width to be used for alignment

    86     int textWidth = 0;

    87     QString::const_iterator itr = str.constBegin();

    88     for ( ; itr != str.constEnd(); ++itr) {

    89         QChar unicode = *itr;

    90         if (!m_glyphs.contains(*itr)) {

    91             unicode = 0;

    92             if (!m_glyphs.contains(unicode))

    93                 continue;

    94         }

    95         textWidth += static_cast<int>(m_glyphs[unicode].m_horizAdvX);

    96     }

    97 

    98     QPoint alignmentOffset(0, 0);

    99     if (alignment == Qt::AlignHCenter) {

   100         alignmentOffset.setX(-textWidth / 2);

   101     } else if (alignment == Qt::AlignRight) {

   102         alignmentOffset.setX(-textWidth);

   103     }

   104 

   105     p->translate(alignmentOffset);

   106 

   107     // since in SVG the embedded font ain't really a path

   108     // the outline has got to stay untransformed...

   109     qreal penWidth = p->pen().widthF();

   110     penWidth /= (pixelSize/m_unitsPerEm);

   111     QPen pen = p->pen();

   112     pen.setWidthF(penWidth);

   113     p->setPen(pen);

   114 

   115     itr = str.constBegin();

   116     for ( ; itr != str.constEnd(); ++itr) {

   117         QChar unicode = *itr;

   118         if (!m_glyphs.contains(*itr)) {

   119             unicode = 0;

   120             if (!m_glyphs.contains(unicode))

   121                 continue;

   122         }

   123         p->drawPath(m_glyphs[unicode].m_path);

   124         p->translate(m_glyphs[unicode].m_horizAdvX, 0);

   125     }

   126 

   127     p->restore();

   128 }

   129 

   130 void QSvgFont::setFamilyName(const QString &name)

   131 {

   132     m_familyName = name;

   133 }

   134 

   135 void QSvgFont::setUnitsPerEm(qreal upem)

   136 {

   137     m_unitsPerEm = upem;

   138 }

   139 

   140 QT_END_NAMESPACE

   141 

   142 #endif // QT_NO_SVG