Explicitly set the text format (optimization)

src/pbfhandler.cpp

@@ -8,7 +8,7 @@
 #include "pbfhandler.h"
 
 
-#define TILE_SIZE 256
+#define TILE_SIZE 512
 
 #define GZIP_MAGIC      0x1F8B0800
 #define GZIP_MAGIC_MASK 0xFFFFFF00
@@ -75,8 +75,8 @@ bool PBFHandler::read(QImage *image)
 	QSize size = _scaledSize.isValid()
 	  ? _scaledSize : QSize(TILE_SIZE, TILE_SIZE);
 	QPointF scale = _scaledSize.isValid()
-	  ? QPointF(_scaledSize.width() / TILE_SIZE, _scaledSize.height() / TILE_SIZE)
-	  : QPointF(1.0, 1.0);
+	  ? QPointF((qreal)_scaledSize.width() / TILE_SIZE,
+		(qreal)_scaledSize.height() / TILE_SIZE) : QPointF(1.0, 1.0);
 	*image = QImage(size, QImage::Format_ARGB32_Premultiplied);
 	Tile tile(image, ok ? zoom : -1, scale);
 

src/style.cpp

@@ -230,6 +230,9 @@ Style::Layer::Paint::Paint(const QJsonObject &json)
 
 	// text
 	_textColor = FunctionC(json["text-color"]);
+	_textHaloColor = FunctionC(json["text-halo-color"], QColor());
+	_textHaloWidth = FunctionF(json["text-halo-width"]);
+	_textHaloBlur = FunctionF(json["text-halo-blur"]);
 }
 
 QPen Style::Layer::Paint::pen(Type type, int zoom) const
@@ -434,7 +437,7 @@ Text::RotationAlignment Style::Layer::Layout::textRotationAlignment(int zoom)
 }
 
 Style::Layer::Layer(const QJsonObject &json)
-  : _type(Unknown), _minZoom(-1), _maxZoom(-1)
+  : _type(Unknown), _minZoom(0), _maxZoom(24)
 {
 	// type
 	QString type(json["type"].toString());
@@ -472,12 +475,8 @@ Style::Layer::Layer(const QJsonObject &json)
 
 bool Style::Layer::match(int zoom, const PBF::Feature &feature) const
 {
-	if (zoom >= 0) {
-		if (_minZoom > 0 && zoom < _minZoom)
-			return false;
-		if (_maxZoom > 0 && zoom > _maxZoom)
-			return false;
-	}
+	if (zoom >= 0 && (zoom < _minZoom || zoom > _maxZoom))
+		return false;
 
 	return _filter.match(feature);
 }
@@ -511,6 +510,7 @@ void Style::Layer::setTextProperties(Tile &tile) const
 	t.setFont(_layout.font(zoom));
 	t.setSymbolPlacement(_layout.symbolPlacement(zoom));
 	t.setRotationAlignment(_layout.textRotationAlignment(zoom));
+	t.setHalo(_paint.halo(zoom));
 }
 
 void Style::Layer::addSymbol(Tile &tile, const QPainterPath &path,
@@ -597,7 +597,8 @@ void Style::setupLayer(Tile &tile, const Layer &layer) const
 
 void Style::drawBackground(Tile &tile) const
 {
-	QRectF rect(QPointF(0, 0), tile.size());
+	QRectF rect(QPointF(0, 0), QSizeF(tile.size().width() / tile.scale().x(),
+	  tile.size().height() / tile.scale().y()));
 	QPainterPath path;
 	path.addRect(rect);
 

src/style.h

@@ -35,7 +35,7 @@ public:
 private:
 	class Layer {
 	public:
-		Layer() : _type(Unknown), _minZoom(-1), _maxZoom(-1) {}
+		Layer() : _type(Unknown), _minZoom(0), _maxZoom(24) {}
 		Layer(const QJsonObject &json);
 
 		const QString &sourceLayer() const {return _sourceLayer;}
@@ -137,9 +137,13 @@ private:
 			  const;
 			qreal opacity(Layer::Type type, int zoom) const;
 			bool antialias(Layer::Type type, int zoom) const;
+			Text::Halo halo(int zoom) const
+			  {return Text::Halo(_textHaloColor.value(zoom),
+			  _textHaloWidth.value(zoom), _textHaloBlur.value(zoom));}
 
 		private:
 			FunctionC _textColor;
+			FunctionC _textHaloColor;
 			FunctionC _lineColor;
 			FunctionC _fillColor;
 			FunctionC _fillOutlineColor;
@@ -147,6 +151,8 @@ private:
 			FunctionF _fillOpacity;
 			FunctionF _lineOpacity;
 			FunctionF _lineWidth;
+			FunctionF _textHaloWidth;
+			FunctionF _textHaloBlur;
 			FunctionB _fillAntialias;
 			QVector<qreal> _lineDasharray;
 			FunctionS _fillPattern;

src/text.cpp

@@ -1,6 +1,7 @@
 #include <QFontMetrics>
 #include <QPainter>
 #include <QSet>
+#include <QMap>
 #include "text.h"
 #include "textpointitem.h"
 #include "textpathitem.h"
@@ -31,22 +32,36 @@ void Text::addLabel(const QString &text, const QImage &icon,
 {
 	TextItem *ti;
 
-	switch (_placement) {
-		case Line:
-			if (_alignment == Viewport)
+	if (_alignment == Viewport) {
+		QMap<qreal, int> map;
+		for (int j = 0; j < path.elementCount(); j++) {
+			QLineF l(path.elementAt(j), _sceneRect.center());
+			map.insert(l.length(), j);
+		}
+		QMap<qreal, int>::const_iterator jt = map.constBegin();
+		ti = new TextPointItem(text, path.elementAt(jt.value()), _font,
+		  _maxWidth, _anchor, icon);
+		while (true) {
+			if (_sceneRect.contains(ti->boundingRect()))
+				break;
+			if (++jt == map.constEnd())
+				break;
+			static_cast<TextPointItem*>(ti)->setPos(path.elementAt(
+			  jt.value()));
+		}
+	} else {
+		switch (_placement) {
+			case Line:
+				ti = new TextPathItem(text, path, _font, _maxAngle, _sceneRect);
+				break;
+			case LineCenter:
+				ti = new TextPointItem(text, path.pointAtPercent(0.5), _font,
+				  _maxWidth, _anchor, icon);
+				break;
+			default:
 				ti = new TextPointItem(text, path.elementAt(0), _font,
 				  _maxWidth, _anchor, icon);
-			else
-				ti = new TextPathItem(text, path, _font, _maxAngle, _sceneRect);
-			break;
-		case LineCenter:
-			ti = new TextPointItem(text, path.pointAtPercent(0.5), _font,
-			  _maxWidth, _anchor, icon);
-			break;
-		default:
-			ti = new TextPointItem(text, path.elementAt(0), _font, _maxWidth,
-			  _anchor, icon);
-			break;
+		}
 	}
 
 	// Note: empty path == point geometry (single move)
@@ -56,6 +71,7 @@ void Text::addLabel(const QString &text, const QImage &icon,
 	}
 
 	ti->setPen(_pen);
+	ti->setHalo(_halo);
 	addItem(ti);
 
 	QList<TextItem*> ci = collidingItems(ti);

src/text.h

@@ -34,6 +34,22 @@ public:
 		Auto
 	};
 
+	class Halo {
+	public:
+		Halo() : _width(0), _blur(0) {}
+		Halo(const QColor &color, qreal width, qreal blur)
+		  : _color(color), _width(width), _blur(blur) {}
+
+		const QColor &color() const {return _color;}
+		qreal width() const {return _width;}
+		qreal blur() const {return _blur;}
+
+	private:
+		QColor _color;
+		qreal _width;
+		qreal _blur;
+	};
+
 	Text(const QSize &size) : _sceneRect(QRectF(QPointF(0, 0), size)) {}
 	~Text();
 
@@ -45,6 +61,7 @@ public:
 	void setSymbolPlacement(SymbolPlacement placement);
 	void setRotationAlignment(RotationAlignment alignment)
 	  {_alignment = alignment;}
+	void setHalo(const Halo &halo) {_halo = halo;}
 
 	void addLabel(const QString &text, const QImage &icon,
 	  const QPainterPath &path);
@@ -65,6 +82,7 @@ private:
 	RotationAlignment _alignment;
 	QFont _font;
 	QPen _pen;
+	Halo _halo;
 };
 
 #endif // TEXT_H

src/textitem.cpp

@@ -11,7 +11,7 @@ bool TextItem::collidesWithItem(const TextItem *other) const
 	return other->shape().intersects(shape());
 }
 
-int TextItem::avgCharWidth() const
+qreal TextItem::avgCharWidth() const
 {
 	qreal ratio;
 	ushort cp = _text.at(0).unicode();
@@ -21,14 +21,18 @@ int TextItem::avgCharWidth() const
 		ratio = 1.0;
 	// Greek & Cyrilic
 	else if (cp >= 0x03FF && cp <= 0x04FF) {
-		ratio = (_font.capitalization() == QFont::AllUppercase) ? 0.75 : 0.67;
+		ratio = (_font.capitalization() == QFont::AllUppercase) ? 0.80 : 0.73;
 		if (_font.bold())
 			ratio *= 1.1;
+		if (_font.italic())
+			ratio *= 0.9;
 	// The rest (Latin scripts, Arabic, ...)
 	} else {
-		ratio = (_font.capitalization() == QFont::AllUppercase) ? 0.7 : 0.58;
+		ratio = (_font.capitalization() == QFont::AllUppercase) ? 0.75 : 0.63;
 		if (_font.bold())
 			ratio *= 1.1;
+		if (_font.italic())
+			ratio *= 0.9;
 	}
 
 	return ratio * _font.pixelSize();

src/textitem.h

@@ -6,6 +6,7 @@
 #include <QPen>
 #include <QFont>
 #include <QRectF>
+#include "text.h"
 
 class QPainter;
 
@@ -19,7 +20,9 @@ public:
 	const QString &text() const {return _text;}
 	const QFont &font() const {return _font;}
 	const QPen &pen() const {return _pen;}
+	const Text::Halo &halo() const {return _halo;}
 	void setPen(const QPen &pen) {_pen = pen;}
+	void setHalo(const Text::Halo &halo) {_halo = halo;}
 
 	virtual QPainterPath shape() const = 0;
 	virtual QRectF boundingRect() const = 0;
@@ -31,12 +34,13 @@ public:
 	bool collidesWithItem(const TextItem *other) const;
 
 protected:
-	int avgCharWidth() const;
+	qreal avgCharWidth() const;
 
 private:
 	QString _text;
 	QFont _font;
 	QPen _pen;
+	Text::Halo _halo;
 	bool _visible;
 };
 

src/textpathitem.cpp

@@ -3,23 +3,23 @@
 #include "textpathitem.h"
 
 
-static QPointF intersection(const QLineF &line, const QRectF &rect)
+static bool intersection(const QLineF &line, const QRectF &rect,
+  QPointF *p)
 {
-	QPointF p;
-	if (line.intersect(QLineF(rect.topLeft(), rect.topRight()), &p)
+	if (line.intersect(QLineF(rect.topLeft(), rect.topRight()), p)
 	  == QLineF::BoundedIntersection)
-		return p;
-	if (line.intersect(QLineF(rect.topLeft(), rect.bottomLeft()), &p)
+		return true;
+	if (line.intersect(QLineF(rect.topLeft(), rect.bottomLeft()), p)
 	  == QLineF::BoundedIntersection)
-		return p;
-	if (line.intersect(QLineF(rect.bottomRight(), rect.bottomLeft()), &p)
+		return true;
+	if (line.intersect(QLineF(rect.bottomRight(), rect.bottomLeft()), p)
 	  == QLineF::BoundedIntersection)
-		return p;
-	if (line.intersect(QLineF(rect.bottomRight(), rect.topRight()), &p)
+		return true;
+	if (line.intersect(QLineF(rect.bottomRight(), rect.topRight()), p)
 	  == QLineF::BoundedIntersection)
-		return p;
+		return true;
 
-	return rect.center();
+	return false;
 }
 
 static QPainterPath subpath(const QList<QLineF> &lines, int start, int end,
@@ -63,6 +63,7 @@ static QList<QLineF> lineString(const QPainterPath &path,
 {
 	QList<QLineF> lines;
 	int start = 0, end = path.elementCount() - 1;
+	QPointF p;
 
 	for (int i = 0; i < path.elementCount(); i++) {
 		if (boundingRect.contains(path.elementAt(i))) {
@@ -79,16 +80,14 @@ static QList<QLineF> lineString(const QPainterPath &path,
 
 	if (start > 0) {
 		QLineF l(path.elementAt(start-1), path.elementAt(start));
-		QPointF p(intersection(l, boundingRect));
-		if (p != boundingRect.center())
+		if (intersection(l, boundingRect, &p))
 			lines.append(QLineF(p, path.elementAt(start)));
 	}
 	for (int i = start + 1; i <= end; i++)
 		lines.append(QLineF(path.elementAt(i-1), path.elementAt(i)));
 	if (end < path.elementCount() - 1) {
 		QLineF l(path.elementAt(end), path.elementAt(end+1));
-		QPointF p(intersection(l, boundingRect));
-		if (p != boundingRect.center())
+		if (intersection(l, boundingRect, &p))
 			lines.append(QLineF(path.elementAt(end), p));
 	}
 
@@ -136,7 +135,7 @@ TextPathItem::TextPathItem(const QString &text, const QPainterPath &path,
   const QFont &font, int maxAngle, const QRectF &tileRect)
   : TextItem(text, font)
 {
-	int cw = avgCharWidth();
+	qreal cw = avgCharWidth();
 	int textWidth = text.size() * cw;
 	if (textWidth > path.length())
 		return;
@@ -166,10 +165,35 @@ void TextPathItem::paint(QPainter *painter) const
 	qreal percent = (1.0 - factor) / 2.0;
 
 	painter->setFont(font());
-	painter->setPen(pen());
 
 	QTransform t = painter->transform();
 
+	if (halo().color().isValid() && halo().width() > 0) {
+		painter->setPen(halo().color());
+		for (int i = 0; i < text().size(); i++) {
+			QPointF point = _path.pointAtPercent(percent);
+			qreal angle = _path.angleAtPercent(percent);
+
+			painter->translate(point);
+			painter->rotate(-angle);
+			painter->drawText(QPoint(-1, fm.descent() - 1), text().at(i));
+			painter->drawText(QPoint(1, fm.descent() + 1), text().at(i));
+			painter->drawText(QPoint(-1, fm.descent() + 1), text().at(i));
+			painter->drawText(QPoint(1, fm.descent() -1), text().at(i));
+			painter->drawText(QPoint(0, fm.descent() - 1), text().at(i));
+			painter->drawText(QPoint(0, fm.descent() + 1), text().at(i));
+			painter->drawText(QPoint(-1, fm.descent()), text().at(i));
+			painter->drawText(QPoint(1, fm.descent()), text().at(i));
+			painter->setTransform(t);
+
+			int width = fm.charWidth(text(), i);
+			percent += ((qreal)width / (qreal)textWidth) * factor;
+		}
+
+		percent = (1.0 - factor) / 2.0;
+	}
+
+	painter->setPen(pen());
 	for (int i = 0; i < text().size(); i++) {
 		QPointF point = _path.pointAtPercent(percent);
 		qreal angle = _path.angleAtPercent(percent);

src/textpointitem.cpp

@@ -1,34 +1,20 @@
 #include <QPainter>
 #include <QtMath>
+#include <QStaticText>
 #include "config.h"
 #include "textpointitem.h"
 
 
 #define FLAGS (Qt::AlignCenter | Qt::TextWordWrap | Qt::TextDontClip)
 
-QRectF TextPointItem::exactBoundingRect() const
-{
-	QFontMetrics fm(font());
-	int limit = font().pixelSize() * _maxWidth;
-	// Italic fonts overflow the computed bounding rect, so reduce it
-	// a little bit.
-	if (font().italic())
-		limit -= font().pixelSize() / 2.0;
-
-	QRect br = fm.boundingRect(QRect(0, 0, limit, 0), FLAGS, text());
-	Q_ASSERT(br.isValid());
-	// Expand the bounding rect back to the real content size
-	if (font().italic())
-		br.adjust(-font().pixelSize() / 4.0, 0, font().pixelSize() / 4.0, 0);
-
-	return br;
-}
-
 QRectF TextPointItem::fuzzyBoundingRect() const
 {
-	int limit = font().pixelSize() * _maxWidth;
+	int fs = font().pixelSize();
+	if (text().size() <= 3)
+		return QRectF(0, 0, text().size() * fs, fs * 1.6);
+
+	int limit = fs * _maxWidth;
 	qreal cw = avgCharWidth();
-	qreal lh = font().pixelSize() * 1.25;
 	int width = 0, lines = 0;
 
 	QStringList l(text().split('\n'));
@@ -44,7 +30,7 @@ QRectF TextPointItem::fuzzyBoundingRect() const
 				if (wl + pl < limit) {
 					pl += wl + cw;
 				} else {
-					if (wl > limit) {
+					if (wl >= limit) {
 						if (pl > 0)
 							lines++;
 					} else
@@ -61,11 +47,11 @@ QRectF TextPointItem::fuzzyBoundingRect() const
 		}
 	}
 
-	return QRectF(0, 0, width, lines * lh);
+	return QRectF(0, 0, width, lines * fs * 1.6);
 }
 
 
-QRectF TextPointItem::computeTextRect(bool exact) const
+QRectF TextPointItem::moveTextRect(const QRectF &rect) const
 {
 #ifdef ENABLE_HIDPI
 	QRectF iconRect = _icon.isNull() ? QRectF()
@@ -74,19 +60,19 @@ QRectF TextPointItem::computeTextRect(bool exact) const
 	QRectF iconRect = _icon.isNull() ? QRectF() : QRectF(QPointF(0, 0),
 	  QSizeF(_icon.size()));
 #endif // ENABLE_HIDPI
-	QRectF textRect = exact ? exactBoundingRect() : fuzzyBoundingRect();
+	QRectF textRect(rect);
 
 	switch (_anchor) {
 		case Text::Center:
 			textRect.moveCenter(_pos);
 			break;
 		case Text::Left:
-			textRect.moveTopLeft(_pos - QPointF(-iconRect.width() / 2,
-			  textRect.height() / 2));
+			textRect.moveTopLeft(_pos - QPointF(-iconRect.width() / 2
+			  - font().pixelSize()/4.0, textRect.height() / 2));
 			break;
 		case Text::Right:
-			textRect.moveTopRight(_pos - QPointF(iconRect.width() / 2,
-			  textRect.height() / 2));
+			textRect.moveTopRight(_pos - QPointF(iconRect.width() / 2
+			  + font().pixelSize()/4.0, textRect.height() / 2));
 			break;
 		case Text::Bottom:
 			textRect.moveTopLeft(_pos - QPointF(textRect.width() / 2,
@@ -106,7 +92,8 @@ TextPointItem::TextPointItem(const QString &text, const QPointF &pos,
   : TextItem(text, font), _pos(pos), _icon(icon), _maxWidth(maxWidth),
   _anchor(anchor)
 {
-	_boundingRect = computeTextRect(false);
+	_textRect = fuzzyBoundingRect();
+	_boundingRect = moveTextRect(_textRect);
 
 	if (!_icon.isNull()) {
 #ifdef ENABLE_HIDPI
@@ -122,16 +109,24 @@ TextPointItem::TextPointItem(const QString &text, const QPointF &pos,
 	_shape.addRect(_boundingRect);
 }
 
+void TextPointItem::setPos(const QPointF &pos)
+{
+	QPointF d(_boundingRect.left() - _pos.x(), _boundingRect.top() - _pos.y());
+	_boundingRect.moveTopLeft(pos + d);
+	_shape = QPainterPath();
+	_shape.addRect(_boundingRect);
+	_pos = pos;
+}
+
 void TextPointItem::paint(QPainter *painter) const
 {
-	//painter->setPen(Qt::red);
-	//painter->drawRect(_boundingRect);
-
 	QRectF textRect;
 
+	painter->setFont(font());
+	painter->setPen(pen());
+
 	if (!_icon.isNull()) {
-		textRect = (_anchor != Text::Center)
-		  ? computeTextRect(true) : _boundingRect;
+		textRect = moveTextRect(painter->boundingRect(_textRect, FLAGS, text()));
 #ifdef ENABLE_HIDPI
 		painter->drawImage(_pos - QPointF(_icon.width()
 		  / _icon.devicePixelRatioF() / 2, _icon.height()
@@ -143,7 +138,30 @@ void TextPointItem::paint(QPainter *painter) const
 	} else
 		textRect = _boundingRect;
 
-	painter->setFont(font());
-	painter->setPen(pen());
-	painter->drawText(textRect, FLAGS, text());
+	if (hasHalo()) {
+		QStaticText st(text());
+		st.setTextFormat(Qt::PlainText);
+		st.setTextWidth(textRect.width());
+		st.setTextOption(QTextOption(Qt::AlignHCenter));
+		st.setPerformanceHint(QStaticText::AggressiveCaching);
+
+		painter->setPen(halo().color());
+		painter->drawStaticText(textRect.topLeft() + QPointF(-1, -1), st);
+		painter->drawStaticText(textRect.topLeft() + QPointF(+1, +1), st);
+		painter->drawStaticText(textRect.topLeft() + QPointF(-1, +1), st);
+		painter->drawStaticText(textRect.topLeft() + QPointF(+1, -1), st);
+		painter->drawStaticText(textRect.topLeft() + QPointF(0, -1), st);
+		painter->drawStaticText(textRect.topLeft() + QPointF(0, +1), st);
+		painter->drawStaticText(textRect.topLeft() + QPointF(-1, 0), st);
+		painter->drawStaticText(textRect.topLeft() + QPointF(+1, 0), st);
+		painter->setPen(pen());
+		painter->drawStaticText(textRect.topLeft(), st);
+	} else
+		painter->drawText(textRect, FLAGS, text());
+
+	//painter->setBrush(Qt::NoBrush);
+	//painter->setPen(Qt::red);
+	//painter->drawRect(_boundingRect);
+	//painter->setPen(Qt::blue);
+	//painter->drawRect(textRect);
 }

src/textpointitem.h

@@ -15,14 +15,17 @@ public:
 	QPainterPath shape() const {return _shape;}
 	void paint(QPainter *painter) const;
 
+	void setPos(const QPointF &pos);
+
 private:
-	QRectF exactBoundingRect() const;
 	QRectF fuzzyBoundingRect() const;
-	QRectF computeTextRect(bool exact) const;
+	QRectF moveTextRect(const QRectF &rect) const;
+	bool hasHalo() const
+	  {return halo().color().isValid() && halo().width() > 0;}
 
 	QPointF _pos;
 	QPainterPath _shape;
-	QRectF _boundingRect;
+	QRectF _textRect, _boundingRect;
 	QImage _icon;
 	int _maxWidth;
 	Text::Anchor _anchor;