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Added support for curved lines

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This commit is contained in:
Martin Tůma 2023-04-03 23:53:57 +02:00
parent 81f695a672
commit d794de5818
4 changed files with 30 additions and 9 deletions
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27
src/map/mapsforge/rastertile.cpp
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@ -171,7 +171,7 @@ void RasterTile::processAreaLabels(QList<TextItem*> &textItems)
continue;
if (!path.path.elementCount())
path.path = painterPath(path.poly);
path.path = painterPath(path.poly, false);
const QImage *img = si ? &si->img() : 0;
const QFont *font = ti ? &ti->font() : 0;
@ -232,16 +232,31 @@ void RasterTile::drawTextItems(QPainter *painter,
textItems.at(i)->paint(painter);
}
QPainterPath RasterTile::painterPath(const Polygon &polygon) const
QPainterPath RasterTile::painterPath(const Polygon &polygon, bool curve) const
{
QPainterPath path;
for (int i = 0; i < polygon.size(); i++) {
const QVector<Coordinates> &subpath = polygon.at(i);
path.moveTo(ll2xy(subpath.first()));
for (int j = 1; j < subpath.size(); j++)
path.lineTo(ll2xy(subpath.at(j)));
if (curve) {
QPointF p1(ll2xy(subpath.first()));
QPointF p2(0, 0);
QPointF p3(0, 0);
path.moveTo(p1);
for (int j = 1; j < subpath.size(); j++) {
p3 = ll2xy(subpath.at(j));
p2 = QPointF((p1.x() + p3.x()) / 2.0, (p1.y() + p3.y()) / 2.0);
path.quadTo(p1, p2);
p1 = p3;
}
path.quadTo(p2, p3);
} else {
path.moveTo(ll2xy(subpath.first()));
for (int j = 1; j < subpath.size(); j++)
path.lineTo(ll2xy(subpath.at(j)));
}
}
return path;
@ -300,7 +315,7 @@ void RasterTile::drawPaths(QPainter *painter)
}
if (!is.path()->path.elementCount())
is.path()->path = painterPath(is.path()->poly);
is.path()->path = painterPath(is.path()->poly, ri->curve());
if (ri->area()) {
lp.setPen(ri->pen(_zoom));

2
src/map/mapsforge/rastertile.h
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@ -76,7 +76,7 @@ private:
void processPointLabels(QList<TextItem*> &textItems);
void processAreaLabels(QList<TextItem*> &textItems);
void processLineLabels(QList<TextItem*> &textItems);
QPainterPath painterPath(const Polygon &polygon) const;
QPainterPath painterPath(const Polygon &polygon, bool curve) const;
void drawTextItems(QPainter *painter, const QList<TextItem*> &textItems);
void drawPaths(QPainter *painter);

5
src/map/mapsforge/style.cpp
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@ -169,6 +169,11 @@ void Style::line(QXmlStreamReader &reader, const Rule &rule)
else if (join == "bevel")
ri._strokeJoin = Qt::BevelJoin;
}
if (attr.hasAttribute("curve")) {
QString curve(attr.value("curve").toString());
if (curve == "cubic")
ri._curve = true;
}
_paths.append(ri);

5
src/map/mapsforge/style.h
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@ -163,12 +163,13 @@ public:
public:
PathRender(const Rule &rule, int zOrder) : Render(rule),
_zOrder(zOrder), _strokeWidth(0), _strokeCap(Qt::RoundCap),
_strokeJoin(Qt::RoundJoin), _area(false) {}
_strokeJoin(Qt::RoundJoin), _area(false), _curve(false) {}
int zOrder() const {return _zOrder;}
QPen pen(int zoom) const;
QBrush brush() const;
bool area() const {return _area;}
bool curve() const {return _curve;}
private:
friend class Style;
@ -180,7 +181,7 @@ public:
Qt::PenCapStyle _strokeCap;
Qt::PenJoinStyle _strokeJoin;
QImage _fillImage;
bool _area;
bool _area, _curve;
};
class TextRender : public Render