Draw code optimization

src/pbf.cpp

@@ -113,7 +113,7 @@ static inline QPoint parameters(quint32 v1, quint32 v2)
 	return QPoint(zigzag32decode(v1), zigzag32decode(v2));
 }
 
-static void drawFeature(const Feature &feature, Style *style, int styleLayer,
+static void processFeature(const Feature &feature, Style *style, int styleLayer,
   const QSizeF &factor, Tile &tile)
 {
 	if (!style->match(styleLayer, feature.tags()))
@@ -151,7 +151,7 @@ static void drawFeature(const Feature &feature, Style *style, int styleLayer,
 		}
 	}
 
-	style->drawFeature(styleLayer, path, feature.tags(), tile);
+	style->processFeature(styleLayer, path, feature.tags(), tile);
 }
 
 static void drawLayer(const Layer &layer, Style *style, int styleLayer,
@@ -163,8 +163,9 @@ static void drawLayer(const Layer &layer, Style *style, int styleLayer,
 	QSizeF factor(tile.size().width() / (qreal)layer.data()->extent(),
 	  tile.size().height() / (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);
+		processFeature(layer.features().at(i), style, styleLayer, factor, tile);
 }
 
 bool PBF::render(const QByteArray &data, int zoom, Style *style, qreal scale,
@@ -200,7 +201,7 @@ bool PBF::render(const QByteArray &data, int zoom, Style *style, qreal scale,
 		drawLayer(*it, style, i, t);
 	}
 
-	t.render();
+	t.text().render(&t.painter());
 
 	return true;
 }

src/style.cpp

@@ -366,30 +366,22 @@ bool Style::Layer::match(int zoom, const QVariantHash &tags) const
 	return _filter.match(tags);
 }
 
-void Style::Layer::drawPath(int zoom, const QPainterPath &path,
-  Tile &tile) const
+void Style::Layer::setPainter(int zoom, Tile &tile) const
 {
 	QPen pen(_paint.pen(_type, zoom));
-	if (_type == Line && pen.style() == Qt::NoPen)
-		return;
 	QBrush brush(_paint.brush(_type, zoom));
-	if (_type == Fill && brush.style() == Qt::NoBrush)
-		return;
 
 	pen.setJoinStyle(_layout.lineJoin());
 	pen.setCapStyle(_layout.lineCap());
 
 	QPainter &p = tile.painter();
-	p.save();
 	p.setRenderHint(QPainter::Antialiasing, _paint.antialias(_type, zoom));
 	p.setPen(pen);
 	p.setBrush(brush);
 	p.setOpacity(_paint.opacity(_type, zoom));
-	p.drawPath(path);
-	p.restore();
 }
 
-void Style::Layer::drawSymbol(int zoom, const QPainterPath &path,
+void Style::Layer::addSymbol(int zoom, const QPainterPath &path,
   const QVariantHash &tags, Tile &tile) const
 {
 	if (_layout.keys().isEmpty())
@@ -453,15 +445,23 @@ bool Style::match(int layer, const QVariantHash &tags)
 	return _styles.at(layer).match(_zoom, tags);
 }
 
-void Style::drawFeature(int layer, const QPainterPath &path,
+void Style::setPainter(int layer, Tile &tile)
+{
+	const Layer &sl = _styles.at(layer);
+
+	if (sl.isPath())
+		sl.setPainter(_zoom, tile);
+}
+
+void Style::processFeature(int layer, const QPainterPath &path,
   const QVariantHash &tags, Tile &tile)
 {
 	const Layer &sl = _styles.at(layer);
 
 	if (sl.isPath())
-		sl.drawPath(_zoom, path, tile);
+		tile.painter().drawPath(path);
 	else if (sl.isSymbol())
-		sl.drawSymbol(_zoom, path, tags, tile);
+		sl.addSymbol(_zoom, path, tags, tile);
 }
 
 void Style::drawBackground(Tile &tile)
@@ -474,6 +474,8 @@ void Style::drawBackground(Tile &tile)
 		tile.painter().setBrush(Qt::lightGray);
 		tile.painter().setPen(Qt::NoPen);
 		tile.painter().drawRect(rect);
-	} else if (_styles.first().isBackground())
-		_styles.first().drawPath(_zoom, path, tile);
+	} else if (_styles.first().isBackground()) {
+		_styles.first().setPainter(_zoom, tile);
+		tile.painter().drawPath(path);
+	}
 }

src/style.h

@@ -29,7 +29,8 @@ public:
 	bool match(int layer, const QVariantHash &tags);
 
 	void drawBackground(Tile &tile);
-	void drawFeature(int layer, const QPainterPath &path,
+	void setPainter(int layer, Tile &tile);
+	void processFeature(int layer, const QPainterPath &path,
 	  const QVariantHash &tags, Tile &tile);
 
 private:
@@ -43,8 +44,8 @@ private:
 		bool isSymbol() const {return (_type == Symbol);}
 
 		bool match(int zoom, const QVariantHash &tags) const;
-		void drawPath(int zoom, const QPainterPath &path, Tile &tile) const;
-		void drawSymbol(int zoom, const QPainterPath &path,
+		void setPainter(int zoom, Tile &tile) const;
+		void addSymbol(int zoom, const QPainterPath &path,
 		  const QVariantHash &tags, Tile &tile) const;
 
 	private:

src/text.cpp

@@ -140,7 +140,7 @@ Text::~Text()
 		delete _items[i];
 }
 
-void Text::render(QPainter *painter)
+void Text::render(QPainter *painter) const
 {
 	for (int i = 0; i < _items.size(); i++) {
 		const TextItem *ti = _items.at(i);

src/text.h

@@ -10,7 +10,7 @@ public:
 	  : _sceneRect(QRectF(QPointF(0, 0), size)), _fontScale(scale) {}
 	~Text();
 
-	void render(QPainter *painter);
+	void render(QPainter *painter) const;
 
 	void addLabel(const QString &text, const QPointF &pos, const QFont &font,
 	  const QPen &pen, qreal maxTextWidth);

src/tile.h

@@ -14,8 +14,6 @@ public:
 	Text &text() {return _text;}
 	QPainter &painter() {return _painter;}
 
-	void render() {_text.render(&_painter);}
-
 private:
 	QSize _size;
 	Text _text;