mirror of
https://github.com/tumic0/QtPBFImagePlugin.git
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Improved fuzzy bounding rect computation
Code cleanup
This commit is contained in:
parent
9a314c408e
commit
6f5bedb82b
157
src/text.cpp
157
src/text.cpp
@ -5,135 +5,6 @@
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#include "textpathitem.h"
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static QPointF intersection(const QLineF &line, const QRectF &rect)
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{
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QPointF p;
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if (line.intersect(QLineF(rect.topLeft(), rect.topRight()), &p)
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== QLineF::BoundedIntersection)
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return p;
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if (line.intersect(QLineF(rect.topLeft(), rect.bottomLeft()), &p)
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== QLineF::BoundedIntersection)
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return p;
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if (line.intersect(QLineF(rect.bottomRight(), rect.bottomLeft()), &p)
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== QLineF::BoundedIntersection)
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return p;
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if (line.intersect(QLineF(rect.bottomRight(), rect.topRight()), &p)
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== QLineF::BoundedIntersection)
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return p;
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return rect.center();
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}
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static QPainterPath subpath(const QList<QLineF> &lines, int start, int end,
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qreal cut)
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{
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qreal ss = 0, es = 0;
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int si = start, ei = end;
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for (int i = start; i <= end; i++) {
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qreal len = lines.at(i).length();
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if (ss + len < cut / 2) {
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ss += len;
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si++;
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} else
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break;
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}
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for (int i = end; i >= start; i--) {
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qreal len = lines.at(i).length();
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if (es + len < cut / 2) {
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es += len;
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ei--;
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} else
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break;
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}
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QLineF sl(lines.at(si).p2(), lines.at(si).p1());
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sl.setLength(sl.length() - (cut / 2 - ss));
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QLineF el(lines.at(ei));
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el.setLength(el.length() - (cut / 2 - es));
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QPainterPath p(sl.p2());
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for (int i = si; i <= ei; i++)
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p.lineTo(lines.at(i).p2());
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p.setElementPositionAt(p.elementCount() - 1, el.p2().x(), el.p2().y());
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return p;
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}
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static QList<QLineF> lineString(const QPainterPath &path,
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const QRectF &boundingRect)
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{
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QList<QLineF> lines;
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int start = 0, end = path.elementCount() - 1;
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for (int i = 0; i < path.elementCount(); i++) {
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if (boundingRect.contains(path.elementAt(i))) {
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start = i;
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break;
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}
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}
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for (int i = path.elementCount() - 1; i >= 0; i--) {
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if (boundingRect.contains(path.elementAt(i))) {
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end = i;
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break;
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}
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}
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if (start > 0) {
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QLineF l(path.elementAt(start-1), path.elementAt(start));
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QPointF p(intersection(l, boundingRect));
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if (p != boundingRect.center())
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lines.append(QLineF(p, path.elementAt(start)));
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}
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for (int i = start + 1; i <= end; i++)
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lines.append(QLineF(path.elementAt(i-1), path.elementAt(i)));
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if (end < path.elementCount() - 1) {
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QLineF l(path.elementAt(end), path.elementAt(end+1));
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QPointF p(intersection(l, boundingRect));
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if (p != boundingRect.center())
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lines.append(QLineF(path.elementAt(end), p));
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}
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return lines;
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}
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static QPainterPath textPath(const QPainterPath &path, qreal textWidth,
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qreal maxAngle, qreal charWidth, const QRectF &tileRect)
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{
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QList<QLineF> lines(lineString(path, tileRect));
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qreal length = 0;
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qreal angle = lines.first().angle();
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int last = 0;
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for (int i = 0; i < lines.size(); i++) {
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qreal sl = lines.at(i).length();
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qreal a = lines.at(i).angle();
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if (!tileRect.contains(lines.at(i).p2()) || sl < charWidth
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|| qAbs(angle - a) > maxAngle) {
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if (length > textWidth)
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return subpath(lines, last, i - 1, length - textWidth);
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last = i;
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length = 0;
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} else
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length += sl;
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angle = a;
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}
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return (length > textWidth)
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? subpath(lines, last, lines.size() - 1, length - textWidth)
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: QPainterPath();
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}
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static bool reverse(const QPainterPath &path)
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{
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QLineF l(path.elementAt(0), path.elementAt(1));
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qreal angle = l.angle();
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return (angle > 90 && angle < 270) ? true : false;
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}
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Text::~Text()
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{
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for (int i = 0; i < _items.size(); i++)
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@ -168,17 +39,8 @@ void Text::addLabel(const QString &text, const QPointF &pos, bool overlap,
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void Text::addLabel(const QString &text, const QPainterPath &path)
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{
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int textWidth = text.size() * _font.pixelSize() * 0.6;
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if (textWidth > path.length())
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return;
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QPainterPath tp(textPath(path, textWidth, _maxAngle, _font.pixelSize() / 2,
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_sceneRect));
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if (tp.isEmpty())
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return;
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TextPathItem *ti = new TextPathItem(text, reverse(tp) ? tp.toReversed()
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: tp, _font);
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TextPathItem *ti = new TextPathItem(text, path, _font, _maxAngle,
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_sceneRect);
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if (!_sceneRect.contains(ti->boundingRect())) {
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delete ti;
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return;
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@ -207,3 +69,18 @@ QList<TextItem*> Text::collidingItems(const TextItem *item) const
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return list;
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}
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qreal Text::avgCharRatio(const QString &str, const QFont &font)
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{
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qreal ratio;
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if (str.at(0).unicode() > 0x2E80)
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ratio = 1.0;
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else {
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ratio = (font.capitalization() == QFont::AllUppercase) ? 0.66 : 0.55;
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if (font.bold())
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ratio *= 1.1;
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}
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return ratio;
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}
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@ -38,6 +38,8 @@ public:
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void render(QPainter *painter) const;
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static qreal avgCharRatio(const QString &str, const QFont &font);
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private:
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void addItem(TextItem *item) {_items.append(item);}
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QList<TextItem *> collidingItems(const TextItem *item) const;
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@ -3,13 +3,155 @@
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#include "textpathitem.h"
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TextPathItem::TextPathItem(const QString &text, const QPainterPath &path,
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const QFont &font) : TextItem(text), _path(path), _font(font)
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static QPointF intersection(const QLineF &line, const QRectF &rect)
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{
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QPointF p;
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if (line.intersect(QLineF(rect.topLeft(), rect.topRight()), &p)
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== QLineF::BoundedIntersection)
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return p;
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if (line.intersect(QLineF(rect.topLeft(), rect.bottomLeft()), &p)
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== QLineF::BoundedIntersection)
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return p;
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if (line.intersect(QLineF(rect.bottomRight(), rect.bottomLeft()), &p)
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== QLineF::BoundedIntersection)
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return p;
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if (line.intersect(QLineF(rect.bottomRight(), rect.topRight()), &p)
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== QLineF::BoundedIntersection)
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return p;
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return rect.center();
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}
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static QPainterPath subpath(const QList<QLineF> &lines, int start, int end,
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qreal cut)
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{
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qreal ss = 0, es = 0;
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int si = start, ei = end;
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for (int i = start; i <= end; i++) {
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qreal len = lines.at(i).length();
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if (ss + len < cut / 2) {
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ss += len;
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si++;
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} else
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break;
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}
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for (int i = end; i >= start; i--) {
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qreal len = lines.at(i).length();
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if (es + len < cut / 2) {
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es += len;
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ei--;
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} else
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break;
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}
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QLineF sl(lines.at(si).p2(), lines.at(si).p1());
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sl.setLength(sl.length() - (cut / 2 - ss));
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QLineF el(lines.at(ei));
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el.setLength(el.length() - (cut / 2 - es));
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QPainterPath p(sl.p2());
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for (int i = si; i <= ei; i++)
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p.lineTo(lines.at(i).p2());
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p.setElementPositionAt(p.elementCount() - 1, el.p2().x(), el.p2().y());
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return p;
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}
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static QList<QLineF> lineString(const QPainterPath &path,
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const QRectF &boundingRect)
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{
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QList<QLineF> lines;
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int start = 0, end = path.elementCount() - 1;
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for (int i = 0; i < path.elementCount(); i++) {
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if (boundingRect.contains(path.elementAt(i))) {
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start = i;
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break;
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}
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}
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for (int i = path.elementCount() - 1; i >= 0; i--) {
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if (boundingRect.contains(path.elementAt(i))) {
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end = i;
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break;
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}
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}
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if (start > 0) {
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QLineF l(path.elementAt(start-1), path.elementAt(start));
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QPointF p(intersection(l, boundingRect));
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if (p != boundingRect.center())
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lines.append(QLineF(p, path.elementAt(start)));
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}
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for (int i = start + 1; i <= end; i++)
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lines.append(QLineF(path.elementAt(i-1), path.elementAt(i)));
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if (end < path.elementCount() - 1) {
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QLineF l(path.elementAt(end), path.elementAt(end+1));
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QPointF p(intersection(l, boundingRect));
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if (p != boundingRect.center())
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lines.append(QLineF(path.elementAt(end), p));
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}
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return lines;
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}
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static QPainterPath textPath(const QPainterPath &path, qreal textWidth,
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qreal maxAngle, qreal charWidth, const QRectF &tileRect)
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{
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QList<QLineF> lines(lineString(path, tileRect));
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qreal length = 0;
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qreal angle = lines.first().angle();
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int last = 0;
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for (int i = 0; i < lines.size(); i++) {
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qreal sl = lines.at(i).length();
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qreal a = lines.at(i).angle();
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if (!tileRect.contains(lines.at(i).p2()) || sl < charWidth
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|| qAbs(angle - a) > maxAngle) {
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if (length > textWidth)
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return subpath(lines, last, i - 1, length - textWidth);
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last = i;
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length = 0;
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} else
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length += sl;
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angle = a;
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}
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return (length > textWidth)
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? subpath(lines, last, lines.size() - 1, length - textWidth)
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: QPainterPath();
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}
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static bool reverse(const QPainterPath &path)
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{
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QLineF l(path.elementAt(0), path.elementAt(1));
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qreal angle = l.angle();
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return (angle > 90 && angle < 270) ? true : false;
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}
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TextPathItem::TextPathItem(const QString &text, const QPainterPath &path,
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const QFont &font, int maxAngle, const QRectF &tileRect)
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: TextItem(text), _font(font)
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{
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qreal acr = Text::avgCharRatio(text, _font);
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int textWidth = text.size() * _font.pixelSize() * acr;
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if (textWidth > path.length())
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return;
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QPainterPath tp(textPath(path, textWidth, maxAngle, _font.pixelSize() * acr,
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tileRect));
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if (tp.isEmpty())
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return;
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_path = reverse(tp) ? tp.toReversed() : tp;
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QPainterPathStroker s;
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s.setWidth(font.pixelSize());
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s.setCapStyle(Qt::FlatCap);
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_shape = s.createStroke(path).simplified();
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_shape = s.createStroke(_path).simplified();
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_boundingRect = _shape.boundingRect();
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}
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@ -10,7 +10,7 @@ class TextPathItem : public TextItem
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{
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public:
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TextPathItem(const QString &text, const QPainterPath &path,
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const QFont &font);
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const QFont &font, int maxAngle, const QRectF &tileRect);
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QPainterPath shape() const {return _shape;}
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QRectF boundingRect() const {return _boundingRect;}
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@ -28,13 +28,13 @@ static QRectF fuzzyBoundingRect(const QString &str, const QFont &font,
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int maxWidth)
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{
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int limit = font.pixelSize() * maxWidth;
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qreal acw = (font.capitalization() == QFont::AllUppercase) ? 0.66 : 0.55;
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qreal cw = font.pixelSize() * acw;
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if (font.bold())
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acw *= 1.1;
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qreal cw = font.pixelSize() * Text::avgCharRatio(str, font);
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qreal lh = font.pixelSize() * 1.25;
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int width = 0, lines = 0;
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if (font.italic())
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limit -= font.pixelSize() / 2.0;
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QStringList l(str.split('\n'));
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for (int i = 0; i < l.size(); i++) {
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int lw = (int)(l.at(i).length() * cw);
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