mirror of
https://github.com/tumic0/GPXSee.git
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369 lines
8.8 KiB
C++
369 lines
8.8 KiB
C++
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#include <QFile>
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#include <QPainter>
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#include <QPixmapCache>
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#if QT_VERSION < QT_VERSION_CHECK(5, 0, 0)
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#include <QtCore>
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#else // QT_VERSION < 5
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#include <QtConcurrent>
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#endif // QT_VERSION < 5
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#include "common/rectc.h"
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#include "common/wgs84.h"
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#include "IMG/textpathitem.h"
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#include "IMG/textpointitem.h"
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#include "IMG/bitmapline.h"
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#include "pcs.h"
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#include "rectd.h"
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#include "imgmap.h"
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#define TILE_SIZE 256
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#define TEXT_EXTENT 256
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#define LARGE_FONT_SIZE 14
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#define NORMAL_FONT_SIZE 12
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#define SMALL_FONT_SIZE 10
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#define POI_FONT_SIZE 9
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#define LINE_TEXT_MIN_ZOOM 23
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#define POI_MIN_ZOOM 25
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#define POI_TEXT_MIN_ZOOM 26
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class RasterTile
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{
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public:
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RasterTile() : _map(0) {}
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RasterTile(IMGMap *map, const QPoint &xy, const QString &key)
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: _map(map), _xy(xy), _key(key),
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_img(TILE_SIZE, TILE_SIZE, QImage::Format_ARGB32_Premultiplied) {}
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const QString &key() const {return _key;}
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const QPoint &xy() const {return _xy;}
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QImage &img() {return _img;}
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QList<IMG::Poly> &polygons() {return _polygons;}
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QList<IMG::Poly> &lines() {return _lines;}
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QList<IMG::Point> &points() {return _points;}
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void load()
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{
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_img.fill(Qt::transparent);
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QPainter painter(&_img);
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painter.setRenderHint(QPainter::SmoothPixmapTransform);
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painter.setRenderHint(QPainter::Antialiasing);
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painter.translate(-_xy.x(), -_xy.y());
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_map->drawPolygons(&painter, _polygons);
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_map->drawLines(&painter, _lines, _xy);
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_map->drawPoints(&painter, _points);
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}
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private:
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IMGMap *_map;
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QPoint _xy;
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QString _key;
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QImage _img;
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QList<IMG::Poly> _polygons;
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QList<IMG::Poly> _lines;
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QList<IMG::Point> _points;
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};
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static void convertUnits(QString &str)
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{
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bool ok;
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int number = str.toInt(&ok);
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if (ok)
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str = QString::number(qRound(number * 0.3048));
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}
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IMGMap::IMGMap(const QString &fileName, QObject *parent)
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: Map(parent), _fileName(fileName), _img(fileName),
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_projection(PCS::pcs(3857)), _valid(false)
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{
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if (!_img.isValid()) {
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_errorString = _img.errorString();
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return;
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}
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_zooms = Range(_img.zooms().min() - 1, 28);
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_zoom = _zooms.min();
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updateTransform();
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_largeFont.setPixelSize(LARGE_FONT_SIZE);
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_normalFont.setPixelSize(NORMAL_FONT_SIZE);
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_smallFont.setPixelSize(SMALL_FONT_SIZE);
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_poiFont.setPixelSize(POI_FONT_SIZE);
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_valid = true;
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}
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QRectF IMGMap::bounds()
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{
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RectD prect(_img.bounds(), _projection);
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return QRectF(_transform.proj2img(prect.topLeft()),
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_transform.proj2img(prect.bottomRight()));
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}
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int IMGMap::zoomFit(const QSize &size, const RectC &rect)
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{
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if (rect.isValid()) {
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QPointF sc((rect.right() - rect.left()) / size.width(),
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(rect.top() - rect.bottom()) / size.height());
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double resolution = qMax(qAbs(sc.x()), qAbs(sc.y()));
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_zoom = _zooms.min();
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for (int i = _zooms.min(); i <= _zooms.max(); i++) {
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if (360.0 / (1<<i) < resolution)
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break;
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_zoom = i;
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}
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} else
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_zoom = _zooms.max();
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updateTransform();
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return _zoom;
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}
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int IMGMap::zoomIn()
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{
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_zoom = qMin(_zoom + 1, _zooms.max());
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updateTransform();
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return _zoom;
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}
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int IMGMap::zoomOut()
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{
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_zoom = qMax(_zoom - 1, _zooms.min());
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updateTransform();
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return _zoom;
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}
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void IMGMap::updateTransform()
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{
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double scale = (2.0 * M_PI * WGS84_RADIUS) / (1<<_zoom);;
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PointD topLeft(_projection.ll2xy(_img.bounds().topLeft()));
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_transform = Transform(ReferencePoint(PointD(0, 0), topLeft),
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PointD(scale, scale));
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}
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QPointF IMGMap::ll2xy(const Coordinates &c)
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{
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return _transform.proj2img(_projection.ll2xy(c));
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}
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Coordinates IMGMap::xy2ll(const QPointF &p)
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{
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return _projection.xy2ll(_transform.img2proj(p));
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}
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void IMGMap::drawPolygons(QPainter *painter, QList<IMG::Poly> &polygons)
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{
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for (int n = 0; n < _img.style().drawOrder().size(); n++) {
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for (int i = 0; i < polygons.size(); i++) {
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IMG::Poly &poly = polygons[i];
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if (poly.type != _img.style().drawOrder().at(n))
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continue;
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const Style::Polygon &style = _img.style().polygon(poly.type);
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for (int j = 0; j < poly.points.size(); j++) {
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QPointF &p = poly.points[j];
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p = ll2xy(Coordinates(p.x(), p.y()));
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}
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painter->setPen(style.pen());
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painter->setBrush(style.brush());
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painter->drawPolygon(poly.points);
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}
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}
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}
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void IMGMap::drawLines(QPainter *painter, QList<IMG::Poly> &lines,
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const QPoint &tile)
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{
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qStableSort(lines);
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for (int i = 0; i < lines.size(); i++) {
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IMG::Poly &poly = lines[i];
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for (int j = 0; j < poly.points.size(); j++) {
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QPointF &p = poly.points[j];
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p = ll2xy(Coordinates(p.x(), p.y()));
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}
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}
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painter->setBrush(Qt::NoBrush);
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for (int i = 0; i < lines.size(); i++) {
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const IMG::Poly &poly = lines.at(i);
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const Style::Line &style = _img.style().line(poly.type);
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if (style.background() == Qt::NoPen)
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continue;
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painter->setPen(style.background());
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painter->drawPolyline(poly.points);
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}
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for (int i = 0; i < lines.size(); i++) {
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const IMG::Poly &poly = lines.at(i);
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const Style::Line &style = _img.style().line(poly.type);
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if (!style.img().isNull())
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BitmapLine::draw(painter, poly.points, style.img());
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else if (style.foreground() != Qt::NoPen) {
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painter->setPen(style.foreground());
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painter->drawPolyline(poly.points);
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}
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}
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if (_zoom < LINE_TEXT_MIN_ZOOM)
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return;
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QVector<TextPathItem> items;
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for (int i = 0; i < lines.size(); i++) {
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IMG::Poly &poly = lines[i];
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const Style::Line &style = _img.style().line(poly.type);
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if (style.img().isNull() && style.foreground() == Qt::NoPen)
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continue;
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if (poly.label.isEmpty() || style.textFontSize() == Style::None)
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continue;
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if (Style::isContourLine(poly.type))
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convertUnits(poly.label);
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const QFont *font;
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switch (style.textFontSize()) {
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case Style::Large:
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font = &_largeFont;
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break;
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case Style::Small:
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font = &_smallFont;
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break;
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default:
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font = &_normalFont;
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}
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const QColor *color = style.textColor().isValid()
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? &style.textColor() : 0;
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TextPathItem item(poly.points, &poly.label, QRect(tile,
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QSize(TILE_SIZE, TILE_SIZE)), font, color);
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if (item.isValid() && !item.collides(items))
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items.append(item);
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}
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for (int i = 0; i < items.size(); i++)
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items.at(i).paint(painter);
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}
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void IMGMap::drawPoints(QPainter *painter, QList<IMG::Point> &points)
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{
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qSort(points);
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QVector<TextPointItem> items;
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for (int i = 0; i < points.size(); i++) {
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const IMG::Point &point = points.at(i);
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const Style::Point &style = _img.style().point(point.type);
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if (point.poi && _zoom < POI_MIN_ZOOM)
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continue;
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const QString *label = ((point.poi && _zoom < POI_TEXT_MIN_ZOOM)
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|| point.label.isEmpty()) ? 0 : &(point.label);
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const QImage *img = style.img().isNull() ? 0 : &style.img();
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const QFont *font = 0;
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if (point.poi)
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font = &_poiFont;
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else {
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switch (style.textFontSize()) {
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case Style::None:
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label = 0;
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break;
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case Style::Normal:
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font = &_normalFont;
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break;
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case Style::Small:
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font = &_smallFont;
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break;
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default:
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font = &_largeFont;
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}
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}
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const QColor *color = style.textColor().isValid()
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? &style.textColor() : 0;
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if (!label && !img)
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continue;
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TextPointItem item(ll2xy(point.coordinates).toPoint(), label, font, img,
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color);
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if (!item.collides(items))
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items.append(item);
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}
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for (int i = 0; i < items.size(); i++)
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items.at(i).paint(painter);
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}
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static void render(RasterTile &tile)
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{
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tile.load();
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}
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void IMGMap::draw(QPainter *painter, const QRectF &rect, Flags flags)
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{
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Q_UNUSED(flags);
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QPointF tl(floor(rect.left() / TILE_SIZE)
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* TILE_SIZE, floor(rect.top() / TILE_SIZE) * TILE_SIZE);
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QSizeF s(rect.right() - tl.x(), rect.bottom() - tl.y());
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int width = ceil(s.width() / TILE_SIZE);
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int height = ceil(s.height() / TILE_SIZE);
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QList<RasterTile> tiles;
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for (int i = 0; i < width; i++) {
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for (int j = 0; j < height; j++) {
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QPixmap pm;
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QPoint ttl(tl.x() + i * TILE_SIZE, tl.y() + j * TILE_SIZE);
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QString key = _fileName + "-" + QString::number(_zoom) + "_"
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+ QString::number(ttl.x()) + "_" + QString::number(ttl.y());
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if (QPixmapCache::find(key, pm))
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painter->drawPixmap(ttl, pm);
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else {
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tiles.append(RasterTile(this, ttl, key));
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RasterTile &tile = tiles.last();
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RectD polyRect(_transform.img2proj(ttl), _transform.img2proj(
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QPointF(ttl.x() + TILE_SIZE, ttl.y() + TILE_SIZE)));
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_img.objects(polyRect.toRectC(_projection, 4), _zoom,
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&(tile.polygons()), &(tile.lines()), 0);
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RectD pointRect(_transform.img2proj(QPointF(ttl.x() - TEXT_EXTENT,
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ttl.y() - TEXT_EXTENT)), _transform.img2proj(QPointF(ttl.x()
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+ TILE_SIZE + TEXT_EXTENT, ttl.y() + TILE_SIZE + TEXT_EXTENT)));
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_img.objects(pointRect.toRectC(_projection, 4), _zoom,
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0, 0, &(tile.points()));
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}
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}
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}
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QFuture<void> future = QtConcurrent::map(tiles, render);
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future.waitForFinished();
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for (int i = 0; i < tiles.size(); i++) {
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RasterTile &mt = tiles[i];
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QPixmap pm(QPixmap::fromImage(mt.img()));
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if (pm.isNull())
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continue;
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QPixmapCache::insert(mt.key(), pm);
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painter->drawPixmap(mt.xy(), pm);
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}
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}
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