// License: GPL. For details, see LICENSE file.
package org.openstreetmap.josm.data.imagery;
import java.awt.Point;
import org.openstreetmap.gui.jmapviewer.Projected;
import org.openstreetmap.gui.jmapviewer.Tile;
import org.openstreetmap.gui.jmapviewer.TileXY;
import org.openstreetmap.gui.jmapviewer.interfaces.ICoordinate;
import org.openstreetmap.gui.jmapviewer.interfaces.IProjected;
import org.openstreetmap.gui.jmapviewer.tilesources.TMSTileSource;
import org.openstreetmap.gui.jmapviewer.tilesources.TileSourceInfo;
import org.openstreetmap.josm.data.Bounds;
import org.openstreetmap.josm.data.ProjectionBounds;
import org.openstreetmap.josm.data.coor.EastNorth;
import org.openstreetmap.josm.data.coor.LatLon;
import org.openstreetmap.josm.data.projection.Projection;
/**
* Base class for different WMS tile sources those based on URL templates and those based on WMS endpoints
* @author Wiktor Niesiobędzki
* @since 10990
*/
public abstract class AbstractWMSTileSource extends TMSTileSource {
private EastNorth anchorPosition;
private int[] tileXMin;
private int[] tileYMin;
private int[] tileXMax;
private int[] tileYMax;
private double[] degreesPerTile;
private static final float SCALE_DENOMINATOR_ZOOM_LEVEL_1 = 559082264.0287178f;
private Projection tileProjection;
/**
* Constructs a new {@code AbstractWMSTileSource}.
* @param info tile source info
* @param tileProjection the tile projection
*/
public AbstractWMSTileSource(TileSourceInfo info, Projection tileProjection) {
super(info);
this.tileProjection = tileProjection;
}
private void initAnchorPosition(Projection proj) {
Bounds worldBounds = proj.getWorldBoundsLatLon();
EastNorth min = proj.latlon2eastNorth(worldBounds.getMin());
EastNorth max = proj.latlon2eastNorth(worldBounds.getMax());
this.anchorPosition = new EastNorth(min.east(), max.north());
}
public void setTileProjection(Projection tileProjection) {
this.tileProjection = tileProjection;
initProjection();
}
public Projection getTileProjection() {
return this.tileProjection;
}
/**
* Initializes class with current projection in JOSM. This call is needed every time projection changes.
*/
public void initProjection() {
initProjection(this.tileProjection);
}
/**
* Initializes class with projection in JOSM. This call is needed every time projection changes.
* @param proj new projection that shall be used for computations
*/
public void initProjection(Projection proj) {
initAnchorPosition(proj);
ProjectionBounds worldBounds = proj.getWorldBoundsBoxEastNorth();
EastNorth topLeft = new EastNorth(worldBounds.getMin().east(), worldBounds.getMax().north());
EastNorth bottomRight = new EastNorth(worldBounds.getMax().east(), worldBounds.getMin().north());
// use 256 as "tile size" to keep the scale in line with default tiles in Mercator projection
double crsScale = 256 * 0.28e-03 / proj.getMetersPerUnit();
tileXMin = new int[getMaxZoom() + 1];
tileYMin = new int[getMaxZoom() + 1];
tileXMax = new int[getMaxZoom() + 1];
tileYMax = new int[getMaxZoom() + 1];
degreesPerTile = new double[getMaxZoom() + 1];
for (int zoom = 1; zoom <= getMaxZoom(); zoom++) {
// use well known scale set "GoogleCompatibile" from OGC WMTS spec to calculate number of tiles per zoom level
// this makes the zoom levels "glued" to standard TMS zoom levels
degreesPerTile[zoom] = (SCALE_DENOMINATOR_ZOOM_LEVEL_1 / Math.pow(2d, zoom - 1d)) * crsScale;
TileXY minTileIndex = eastNorthToTileXY(topLeft, zoom);
tileXMin[zoom] = minTileIndex.getXIndex();
tileYMin[zoom] = minTileIndex.getYIndex();
TileXY maxTileIndex = eastNorthToTileXY(bottomRight, zoom);
tileXMax[zoom] = maxTileIndex.getXIndex();
tileYMax[zoom] = maxTileIndex.getYIndex();
}
}
@Override
public ICoordinate tileXYToLatLon(Tile tile) {
return tileXYToLatLon(tile.getXtile(), tile.getYtile(), tile.getZoom());
}
@Override
public ICoordinate tileXYToLatLon(TileXY xy, int zoom) {
return tileXYToLatLon(xy.getXIndex(), xy.getYIndex(), zoom);
}
@Override
public ICoordinate tileXYToLatLon(int x, int y, int zoom) {
return tileProjection.eastNorth2latlon(getTileEastNorth(x, y, zoom)).toCoordinate();
}
private TileXY eastNorthToTileXY(EastNorth enPoint, int zoom) {
double scale = getDegreesPerTile(zoom);
return new TileXY(
(enPoint.east() - anchorPosition.east()) / scale,
(anchorPosition.north() - enPoint.north()) / scale
);
}
@Override
public TileXY latLonToTileXY(double lat, double lon, int zoom) {
EastNorth enPoint = tileProjection.latlon2eastNorth(new LatLon(lat, lon));
return eastNorthToTileXY(enPoint, zoom);
}
@Override
public TileXY latLonToTileXY(ICoordinate point, int zoom) {
return latLonToTileXY(point.getLat(), point.getLon(), zoom);
}
@Override
public int getTileXMax(int zoom) {
return tileXMax[zoom];
}
@Override
public int getTileXMin(int zoom) {
return tileXMin[zoom];
}
@Override
public int getTileYMax(int zoom) {
return tileYMax[zoom];
}
@Override
public int getTileYMin(int zoom) {
return tileYMin[zoom];
}
@Override
public Point latLonToXY(double lat, double lon, int zoom) {
double scale = getDegreesPerTile(zoom) / getTileSize();
EastNorth point = tileProjection.latlon2eastNorth(new LatLon(lat, lon));
return new Point(
(int) Math.round((point.east() - anchorPosition.east()) / scale),
(int) Math.round((anchorPosition.north() - point.north()) / scale)
);
}
@Override
public Point latLonToXY(ICoordinate point, int zoom) {
return latLonToXY(point.getLat(), point.getLon(), zoom);
}
@Override
public ICoordinate xyToLatLon(Point point, int zoom) {
return xyToLatLon(point.x, point.y, zoom);
}
@Override
public ICoordinate xyToLatLon(int x, int y, int zoom) {
double scale = getDegreesPerTile(zoom) / getTileSize();
EastNorth ret = new EastNorth(
anchorPosition.east() + x * scale,
anchorPosition.north() - y * scale
);
return tileProjection.eastNorth2latlon(ret).toCoordinate();
}
protected EastNorth getTileEastNorth(int x, int y, int z) {
double scale = getDegreesPerTile(z);
return new EastNorth(
anchorPosition.east() + x * scale,
anchorPosition.north() - y * scale
);
}
private double getDegreesPerTile(int zoom) {
return degreesPerTile[zoom];
}
@Override
public IProjected tileXYtoProjected(int x, int y, int zoom) {
EastNorth en = getTileEastNorth(x, y, zoom);
return new Projected(en.east(), en.north());
}
@Override
public TileXY projectedToTileXY(IProjected p, int zoom) {
return eastNorthToTileXY(new EastNorth(p.getEast(), p.getNorth()), zoom);
}
@Override
public String getServerCRS() {
return this.tileProjection.toCode();
}
}