Properly scale the whole tile content

src/pbf.cpp

@@ -155,21 +155,21 @@ static void drawFeature(const Feature &feature, Style *style, int styleLayer,
 }
 
 static void drawLayer(const Layer &layer, Style *style, int styleLayer,
-  Tile &tile)
+  Tile &tile, const QPointF &scale)
 {
 	if (layer.data()->version() > 2)
 		return;
 
-	QSizeF factor(tile.size().width() / (qreal)layer.data()->extent(),
-	  tile.size().height() / (qreal)layer.data()->extent());
+	QSizeF factor(tile.size().width() / scale.x() / (qreal)layer.data()->extent(),
+	  tile.size().height() / scale.y() / (qreal)layer.data()->extent());
 
 	style->setPainter(styleLayer, tile);
 	for (int i = 0; i < layer.features().size(); i++)
 		drawFeature(layer.features().at(i), style, styleLayer, factor, tile);
 }
 
-bool PBF::render(const QByteArray &data, int zoom, Style *style, qreal scale,
-  QImage *image)
+bool PBF::render(const QByteArray &data, int zoom, Style *style,
+  const QPointF &scale, QImage *image)
 {
 	vector_tile::Tile tile;
 	if (!tile.ParseFromArray(data.constData(), data.size())) {
@@ -200,7 +200,7 @@ bool PBF::render(const QByteArray &data, int zoom, Style *style, qreal scale,
 		if (it == layers.constEnd())
 			continue;
 
-		drawLayer(*it, style, i, t);
+		drawLayer(*it, style, i, t, scale);
 	}
 
 	t.painter().restore();

src/pbf.h

@@ -8,8 +8,8 @@ class Style;
 
 namespace PBF
 {
-	bool render(const QByteArray &data, int zoom, Style *style, qreal scale,
-	  QImage *render);
+	bool render(const QByteArray &data, int zoom, Style *style,
+	  const QPointF &scale, QImage *render);
 }
 
 #endif // PBF_H

src/pbfhandler.cpp

@@ -67,9 +67,9 @@ bool PBFHandler::read(QImage *image)
 
 	QSize size = _scaledSize.isValid()
 	  ? _scaledSize : QSize(TILE_SIZE, TILE_SIZE);
-	qreal scale = _scaledSize.isValid()
-	  ? qMax(_scaledSize.width() / TILE_SIZE, _scaledSize.height() / TILE_SIZE)
-	  : 1.0;
+	QPointF scale = _scaledSize.isValid()
+	  ? QPointF(_scaledSize.width() / TILE_SIZE, _scaledSize.height() / TILE_SIZE)
+	  : QPointF(1.0, 1.0);
 	*image = QImage(size, QImage::Format_ARGB32_Premultiplied);
 
 	return PBF::render(ba, ok ? zoom : -1, _style, scale, image);

src/style.cpp

@@ -490,4 +490,6 @@ void Style::drawBackground(Tile &tile)
 		_styles.first().setPathPainter(_zoom, tile);
 		tile.painter().drawPath(path);
 	}
+tile.painter().setPen(Qt::red);
+tile.painter().drawRect(rect);
 }

src/text.cpp

@@ -157,12 +157,7 @@ void Text::addLabel(const QString &text, const QPointF &pos,
 
 	TextPointItem *ti;
 
-	if (_fontScale != 1.0) {
-		QFont scaledFont(painter.font());
-		scaledFont.setPixelSize(painter.font().pixelSize() * _fontScale);
-		ti = new TextPointItem(text, pos, scaledFont, maxTextWidth);
-	} else
-		ti = new TextPointItem(text, pos, painter.font(), maxTextWidth);
+	ti = new TextPointItem(text, pos, painter.font(), maxTextWidth);
 
 	ti->setPen(painter.pen());
 	addItem(ti);
@@ -179,20 +174,17 @@ void Text::addLabel(const QString &text, const QPainterPath &path,
 	if (text.isEmpty())
 		return;
 
-	QFont scaledFont(painter.font());
-	scaledFont.setPixelSize(painter.font().pixelSize() * _fontScale);
-
-	int textWidth = text.size() * scaledFont.pixelSize() * 0.6;
+	int textWidth = text.size() * painter.font().pixelSize() * 0.6;
 	if (textWidth > path.length())
 		return;
 
 	QPainterPath tp(textPath(path, textWidth, maxAngle,
-	  scaledFont.pixelSize() / 2, _sceneRect));
+	  painter.font().pixelSize() / 2, _sceneRect));
 	if (tp.isEmpty())
 		return;
 
 	TextPathItem *pi = new TextPathItem(text, reverse(tp) ? tp.toReversed()
-	  : tp, scaledFont);
+	  : tp, painter.font());
 	if (!_sceneRect.contains(pi->boundingRect())) {
 		delete pi;
 		return;

src/text.h

@@ -6,8 +6,7 @@
 class Text
 {
 public:
-	Text(const QSize &size, qreal scale)
-	  : _sceneRect(QRectF(QPointF(0, 0), size)), _fontScale(scale) {}
+	Text(const QSize &size) : _sceneRect(QRectF(QPointF(0, 0), size)) {}
 	~Text();
 
 	void render(QPainter *painter) const;
@@ -22,7 +21,6 @@ private:
 	QList<TextItem *> collidingItems(const TextItem *item) const;
 
 	QRectF _sceneRect;
-	qreal _fontScale;
 	QList<TextItem *> _items;
 };
 

src/textpathitem.cpp

@@ -24,6 +24,8 @@ void TextPathItem::paint(QPainter *painter) const
 	painter->setFont(_font);
 	painter->setPen(_pen);
 
+	QTransform t = painter->transform();
+
 	for (int i = 0; i < _text.size(); i++) {
 		QPointF point = _path.pointAtPercent(percent);
 		qreal angle = _path.angleAtPercent(percent);
@@ -31,7 +33,7 @@ void TextPathItem::paint(QPainter *painter) const
 		painter->translate(point);
 		painter->rotate(-angle);
 		painter->drawText(QPoint(0, fm.descent()), _text.at(i));
-		painter->resetTransform();
+		painter->setTransform(t);
 
 		int width = fm.charWidth(_text, i);
 		percent += ((qreal)width / (qreal)textWidth) * factor;

src/tile.h

@@ -7,8 +7,10 @@
 
 class Tile {
 public:
-	Tile(QImage *img, qreal scale)
-	  : _size(img->size()), _text(img->size(), scale), _painter(img) {}
+	Tile(QImage *img, const QPointF &scale)
+	  : _size(img->size()), _text(QSize(img->size().width() / scale.x(),
+	  img->size().height() / scale.y())), _painter(img)
+	  {_painter.scale(scale.x(), scale.y());}
 
 	QSize size() const {return _size;}
 	Text &text() {return _text;}