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Halo drawing performance improvement

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This commit is contained in:
Martin Tůma 2019-04-28 08:25:57 +02:00
parent 3dfcf35e53
commit 76fb129651
1 changed files with 27 additions and 25 deletions
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52
src/textpointitem.cpp
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@ -128,9 +128,10 @@ void TextPointItem::paint(QPainter *painter) const
//painter->drawRect(_boundingRect);
QRectF textRect;
bool hasHalo = halo().color().isValid() && halo().width() > 0;
if (!_icon.isNull()) {
textRect = (_anchor != Text::Center)
textRect = (_anchor != Text::Center || hasHalo)
? computeTextRect(true) : _boundingRect;
#ifdef ENABLE_HIDPI
painter->drawImage(_pos - QPointF(_icon.width()
@ -141,32 +142,33 @@ void TextPointItem::paint(QPainter *painter) const
_icon.height() / 2), _icon);
#endif // ENABLE_HIDPI
} else
textRect = _boundingRect;
textRect = hasHalo ? computeTextRect(true) : _boundingRect;
painter->setFont(font());
if (halo().color().isValid() && halo().width() > 0) {
QPointF center(textRect.center());
painter->setPen(halo().color());
textRect.moveCenter(QPointF(center.x() - 1, center.y() - 1));
painter->drawText(textRect, FLAGS, text());
textRect.moveCenter(QPointF(center.x() + 1, center.y() + 1));
painter->drawText(textRect, FLAGS, text());
textRect.moveCenter(QPointF(center.x() - 1, center.y() + 1));
painter->drawText(textRect, FLAGS, text());
textRect.moveCenter(QPointF(center.x() + 1, center.y() - 1));
painter->drawText(textRect, FLAGS, text());
textRect.moveCenter(QPointF(center.x(), center.y() - 1));
painter->drawText(textRect, FLAGS, text());
textRect.moveCenter(QPointF(center.x(), center.y() + 1));
painter->drawText(textRect, FLAGS, text());
textRect.moveCenter(QPointF(center.x() - 1, center.y()));
painter->drawText(textRect, FLAGS, text());
textRect.moveCenter(QPointF(center.x() + 1, center.y()));
painter->drawText(textRect, FLAGS, text());
if (hasHalo) {
QRect ir(textRect.toRect());
QImage img(ir.size(), QImage::Format_ARGB32_Premultiplied);
img.fill(Qt::transparent);
QPainter ip(&img);
ip.setPen(halo().color());
ip.setFont(font());
ip.drawText(img.rect(), FLAGS, text());
textRect.moveCenter(center);
painter->drawImage(ir.x() - 1, ir.y() - 1, img);
painter->drawImage(ir.x() + 1, ir.y() + 1, img);
painter->drawImage(ir.x() - 1, ir.y() + 1, img);
painter->drawImage(ir.x() + 1, ir.y() - 1, img);
painter->drawImage(ir.x(), ir.y() - 1, img);
painter->drawImage(ir.x(), ir.y() + 1, img);
painter->drawImage(ir.x() - 1, ir.y(), img);
painter->drawImage(ir.x() + 1, ir.y(), img);
painter->setFont(font());
painter->setPen(pen());
painter->drawText(ir, FLAGS, text());
} else {
painter->setFont(font());
painter->setPen(pen());
painter->drawText(textRect, FLAGS, text());
}
painter->setPen(pen());
painter->drawText(textRect, FLAGS, text());
}