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Added support for tiles with a different size than 256px

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This commit is contained in:
Martin Tůma 2018-09-21 23:18:05 +02:00
parent 39a8a144dd
commit 5a692c71a8
5 changed files with 48 additions and 20 deletions
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41
src/map/mbtilesmap.cpp
View File

@ -82,13 +82,40 @@ MBTilesMap::MBTilesMap(const QString &fileName, QObject *parent)
_bounds = RectC(tl, br);
}
{
QString sql = QString("SELECT tile_data FROM tiles LIMIT 1");
QSqlQuery query(sql, _db);
query.first();
QImage tile = QImage::fromData(query.value(0).toByteArray());
if (tile.isNull() || tile.size().width() != tile.size().height()) {
_errorString = "Unsupported/invalid tile images";
return;
}
_tileSize = tile.size().width();
}
{
QSqlQuery query("SELECT value FROM metadata WHERE name = 'name'", _db);
if (query.first())
_name = query.value(0).toString();
else
else {
qWarning("%s: missing map name", qPrintable(_fileName));
_name = QFileInfo(_fileName).fileName();
}
}
{
QSqlQuery query(
"SELECT value FROM metadata WHERE name = 'tilepixelratio'", _db);
if (query.first()) {
bool ok;
_tileRatio = query.value(0).toString().toDouble(&ok);
if (!ok) {
_errorString = "Invalid tile pixel ratio";
return;
}
}
}
_db.close();
@ -128,7 +155,7 @@ int MBTilesMap::zoomFit(const QSize &size, const RectC &rect)
QRectF tbr(osm::ll2m(rect.topLeft()), osm::ll2m(rect.bottomRight()));
QPointF sc(tbr.width() / size.width(), tbr.height() / size.height());
_zoom = limitZoom(osm::scale2zoom(qMax(sc.x(), -sc.y())
/ coordinatesRatio()));
/ coordinatesRatio(), _tileSize));
}
return _zoom;
@ -136,7 +163,7 @@ int MBTilesMap::zoomFit(const QSize &size, const RectC &rect)
qreal MBTilesMap::resolution(const QRectF &rect)
{
qreal scale = osm::zoom2scale(_zoom);
qreal scale = osm::zoom2scale(_zoom, _tileSize);
return (WGS84_RADIUS * 2.0 * M_PI * scale / 360.0
* cos(2.0 * atan(exp(deg2rad(-rect.center().y() * scale))) - M_PI/2));
@ -166,7 +193,7 @@ qreal MBTilesMap::imageRatio() const
qreal MBTilesMap::tileSize() const
{
return (TILE_SIZE / coordinatesRatio());
return (_tileSize / coordinatesRatio());
}
QByteArray MBTilesMap::tileData(int zoom, const QPoint &tile) const
@ -188,7 +215,7 @@ QByteArray MBTilesMap::tileData(int zoom, const QPoint &tile) const
void MBTilesMap::draw(QPainter *painter, const QRectF &rect, Flags flags)
{
Q_UNUSED(flags);
qreal scale = osm::zoom2scale(_zoom);
qreal scale = osm::zoom2scale(_zoom, _tileSize);
QRectF b(bounds());
@ -224,14 +251,14 @@ void MBTilesMap::draw(QPainter *painter, const QRectF &rect, Flags flags)
QPointF MBTilesMap::ll2xy(const Coordinates &c)
{
qreal scale = osm::zoom2scale(_zoom);
qreal scale = osm::zoom2scale(_zoom, _tileSize);
QPointF m = osm::ll2m(c);
return QPointF(m.x() / scale, m.y() / -scale) / coordinatesRatio();
}
Coordinates MBTilesMap::xy2ll(const QPointF &p)
{
qreal scale = osm::zoom2scale(_zoom);
qreal scale = osm::zoom2scale(_zoom, _tileSize);
return osm::m2ll(QPointF(p.x() * scale, -p.y() * scale)
* coordinatesRatio());
}

1
src/map/mbtilesmap.h
View File

@ -47,6 +47,7 @@ private:
RectC _bounds;
Range _zooms;
int _zoom;
int _tileSize;
qreal _deviceRatio, _tileRatio;
bool _valid;

12
src/map/onlinemap.cpp
View File

@ -8,6 +8,8 @@
#include "onlinemap.h"
#define TILE_SIZE 256
OnlineMap::OnlineMap(const QString &name, const QString &url,
const Range &zooms, const RectC &bounds, qreal tileRatio,
const Authorization &authorization, QObject *parent)
@ -53,7 +55,7 @@ int OnlineMap::zoomFit(const QSize &size, const RectC &rect)
QRectF tbr(osm::ll2m(rect.topLeft()), osm::ll2m(rect.bottomRight()));
QPointF sc(tbr.width() / size.width(), tbr.height() / size.height());
_zoom = limitZoom(osm::scale2zoom(qMax(sc.x(), -sc.y())
/ coordinatesRatio()));
/ coordinatesRatio(), TILE_SIZE));
}
return _zoom;
@ -61,7 +63,7 @@ int OnlineMap::zoomFit(const QSize &size, const RectC &rect)
qreal OnlineMap::resolution(const QRectF &rect)
{
qreal scale = osm::zoom2scale(_zoom);
qreal scale = osm::zoom2scale(_zoom, TILE_SIZE);
return (WGS84_RADIUS * 2.0 * M_PI * scale / 360.0
* cos(2.0 * atan(exp(deg2rad(-rect.center().y() * scale))) - M_PI/2));
@ -96,7 +98,7 @@ qreal OnlineMap::tileSize() const
void OnlineMap::draw(QPainter *painter, const QRectF &rect, Flags flags)
{
qreal scale = osm::zoom2scale(_zoom);
qreal scale = osm::zoom2scale(_zoom, TILE_SIZE);
QRectF b(bounds());
QPoint tile = osm::mercator2tile(QPointF(rect.topLeft().x() * scale,
@ -131,14 +133,14 @@ void OnlineMap::draw(QPainter *painter, const QRectF &rect, Flags flags)
QPointF OnlineMap::ll2xy(const Coordinates &c)
{
qreal scale = osm::zoom2scale(_zoom);
qreal scale = osm::zoom2scale(_zoom, TILE_SIZE);
QPointF m = osm::ll2m(c);
return QPointF(m.x() / scale, m.y() / -scale) / coordinatesRatio();
}
Coordinates OnlineMap::xy2ll(const QPointF &p)
{
qreal scale = osm::zoom2scale(_zoom);
qreal scale = osm::zoom2scale(_zoom, TILE_SIZE);
return osm::m2ll(QPointF(p.x() * scale, -p.y() * scale)
* coordinatesRatio());
}

8
src/map/osm.cpp
View File

@ -18,12 +18,12 @@ QPoint osm::mercator2tile(const QPointF &m, int z)
(int)(floor((1.0 - (m.y() / 180.0)) / 2.0 * (1<<z))));
}
qreal osm::zoom2scale(int zoom)
qreal osm::zoom2scale(int zoom, int tileSize)
{
return (360.0/(qreal)((1<<zoom) * TILE_SIZE));
return (360.0/(qreal)((1<<zoom) * tileSize));
}
int osm::scale2zoom(qreal scale)
int osm::scale2zoom(qreal scale, int tileSize)
{
return (int)(log2(360.0/(scale * (qreal)TILE_SIZE)) + EPSILON);
return (int)(log2(360.0/(scale * (qreal)tileSize)) + EPSILON);
}

6
src/map/osm.h
View File

@ -4,15 +4,13 @@
#include <QPointF>
#include <common/coordinates.h>
#define TILE_SIZE 256
namespace osm
{
QPointF ll2m(const Coordinates &c);
Coordinates m2ll(const QPointF &p);
QPoint mercator2tile(const QPointF &m, int z);
qreal zoom2scale(int zoom);
int scale2zoom(qreal scale);
qreal zoom2scale(int zoom, int tileSize);
int scale2zoom(qreal scale, int tileSize);
}
#endif // OSM_H