src/svg/qsvgfont.cpp

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  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