Code cleanup/optimization

src/pbf.cpp

@@ -121,14 +121,14 @@ static void feature(const Feature &feature, Style *style, int styleLayer,
 
 static void layer(const Layer &layer, Style *style, int styleLayer, Tile &tile)
 {
-	qreal factor = layer.data->extent() / 256.0;
+	qreal factor = layer.data->extent() / (qreal)tile.size();
 
 	for (int i = 0; i < layer.data->features_size(); i++)
 		feature(Feature(&(layer.data->features(i)), &(layer.keys),
 		  &(layer.values)), style, styleLayer, factor, tile);
 }
 
-QImage PBF::image(const QByteArray &data, int zoom, Style *style)
+QImage PBF::image(const QByteArray &data, int zoom, Style *style, int size)
 {
 	vector_tile::Tile tile;
 	if (!tile.ParseFromArray(data.constData(), data.size())) {
@@ -136,7 +136,7 @@ QImage PBF::image(const QByteArray &data, int zoom, Style *style)
 		return QImage();
 	}
 
-	Tile t;
+	Tile t(size);
 
 	style->setZoom(zoom);
 	style->drawBackground(t);

src/pbf.h

@@ -8,7 +8,7 @@ class Style;
 
 namespace PBF
 {
-	QImage image(const QByteArray &data, int zoom, Style *style);
+	QImage image(const QByteArray &data, int zoom, Style *style, int size);
 }
 
 #endif // PBF_H

src/pbfhandler.cpp

@@ -29,7 +29,7 @@ bool PBFHandler::read(QImage *image)
 
 	bool ok;
 	int zoom = format().toInt(&ok);
-	*image = PBF::image(ba, ok ? zoom : -1, _style);
+	*image = PBF::image(ba, ok ? zoom : -1, _style, 256);
 
 	return !image->isNull();
 }

src/style.cpp

@@ -236,7 +236,7 @@ bool Style::Layer::Paint::antialias(Layer::Type type) const
 
 Style::Layer::Layout::Layout(const QJsonObject &json)
   : _textSize(16), _textMaxWidth(10), _lineCap(Qt::FlatCap),
-  _lineJoin(Qt::MiterJoin)
+  _lineJoin(Qt::MiterJoin), _capitalize(false)
 {
 	if (!(json.contains("text-field") && json["text-field"].isString()))
 		return;
@@ -261,6 +261,9 @@ Style::Layer::Layout::Layout(const QJsonObject &json)
 	if (json.contains("text-max-width") && json["text-max-width"].isDouble())
 		_textMaxWidth = json["text-max-width"].toDouble();
 
+	if (json.contains("text-transform") && json["text-transform"].isString())
+		_capitalize = json["text-transform"].toString() == "uppercase";
+
 	if (json.contains("line-cap") && json["line-cap"].isString()) {
 		if (json["line-cap"].toString() == "round")
 			_lineCap = Qt::RoundCap;
@@ -341,39 +344,35 @@ bool Style::Layer::match(int zoom, const QVariantMap &tags) const
 void Style::Layer::drawPath(int zoom, const QPainterPath &path,
   Tile &tile) const
 {
-	QPainter p(&(tile.background()));
+	QPainter *p = tile.painter();
 
 	QPen pen(_paint.pen(_type, zoom));
 	pen.setJoinStyle(_layout.lineJoin());
 	pen.setCapStyle(_layout.lineCap());
 
-	p.setRenderHint(QPainter::Antialiasing,
-	  _paint.antialias(_type));
-	p.setPen(pen);
-	p.setBrush(_paint.brush(_type, zoom));
-	p.setOpacity(_paint.opacity(_type, zoom));
-	p.drawPath(path);
+	p->setRenderHint(QPainter::Antialiasing, _paint.antialias(_type));
+	p->setPen(pen);
+	p->setBrush(_paint.brush(_type, zoom));
+	p->setOpacity(_paint.opacity(_type, zoom));
+	p->drawPath(path);
 }
 
 void Style::Layer::drawSymbol(int zoom, const QPainterPath &path,
   const QVariantMap &tags, Tile &tile) const
 {
-	if (!_layout.showText(zoom))
-		return;
-
 	QString text(_layout.field());
 	for (int i = 0; i < _layout.keys().size(); i++) {
 		const QString &key = _layout.keys().at(i);
 		const QVariant val = tags.value(key);
-		text.replace(QString("{%1}").arg(key), val.toString());
+		text.replace(QString("{%1}").arg(key), _layout.capitalize()
+		  ? val.toString().toUpper() : val.toString());
 	}
 
-	const QPainterPath::Element &e = path.elementAt(0);
 	QPen pen(_paint.pen(_type, zoom));
 	QFont font(_layout.font(zoom));
 
-	if (path.elementCount() == 1)
-		tile.text().addLabel(text.trimmed(), QPointF(e.x, e.y), font, pen,
+	if (path.elementCount() == 1 && path.elementAt(0).isMoveTo())
+		tile.text().addLabel(text.trimmed(), path.elementAt(0), font, pen,
 		  _layout.maxTextWidth(zoom));
 	else
 		tile.text().addLabel(text.trimmed(), path, font, pen);
@@ -419,15 +418,12 @@ void Style::drawFeature(int layer, const QPainterPath &path,
 
 void Style::drawBackground(Tile &tile)
 {
-	QPainterPath p;
-	p.addRect(tile.background().rect());
+	QPainterPath path;
+	path.addRect(QRectF(0, 0, tile.size(), tile.size()));
 
 	if (_styles.isEmpty()) {
-		tile.background().fill(Qt::lightGray);
-		return;
-	}
-
-	for (int i = 0; i < _styles.size(); i++)
-		if (_styles.at(i).isBackground())
-			_styles.at(i).drawPath(_zoom, p, tile);
+		tile.painter()->setBrush(Qt::lightGray);
+		tile.painter()->drawPath(path);
+	} else if (_styles.first().isBackground())
+		_styles.first().drawPath(_zoom, path, tile);
 }

src/style.h

@@ -77,10 +77,10 @@ private:
 		class Layout {
 		public:
 			Layout() : _textSize(16), _textMaxWidth(10), _lineCap(Qt::FlatCap),
-			  _lineJoin(Qt::MiterJoin) {}
+			  _lineJoin(Qt::MiterJoin), _capitalize(false) {}
 			Layout(const QJsonObject &json);
 
-			bool showText(int zoom) const {return _textSize.value(zoom) > 0;}
+			bool capitalize() const {return _capitalize;}
 			qreal maxTextWidth(int zoom) const {return _textMaxWidth.value(zoom);}
 			const QString &field() const {return _textField;}
 			const QStringList &keys() const {return _keys;}
@@ -95,6 +95,7 @@ private:
 			FunctionF _textMaxWidth;
 			Qt::PenCapStyle _lineCap;
 			Qt::PenJoinStyle _lineJoin;
+			bool _capitalize;
 		};
 
 		class Paint {

src/text.h

@@ -6,8 +6,8 @@
 class Text : public QGraphicsScene
 {
 public:
-	Text(QObject *parent = 0) : QGraphicsScene(parent)
-	  {setSceneRect(0, 0, 256, 256);}
+	Text(int size, QObject *parent = 0) : QGraphicsScene(parent)
+	  {setSceneRect(0, 0, size, size);}
 
 	void addLabel(const QString &text, const QPointF &pos, const QFont &font,
 	  const QPen &pen, qreal maxTextWidth);

src/tile.h

@@ -7,20 +7,22 @@
 
 class Tile {
 public:
-	Tile() : _background(256, 256, QImage::Format_ARGB32) {}
+	Tile(int size) : _background(size, size, QImage::Format_ARGB32),
+	  _text(size), _painter(&_background) {}
 
+	int size() const {return _background.width();}
 	Text &text() {return _text;}
-	QImage &background() {return _background;}
+	QPainter *painter() {return &_painter;}
 
 	QImage &render() {
-		QPainter p(&_background);
-		_text.render(&p);
+		_text.render(painter());
 		return _background;
 	}
 
 private:
-	Text _text;
 	QImage _background;
+	Text _text;
+	QPainter _painter;
 };
 
 #endif // TILE_H