Envelope findTileBounds(GridSubset gridSubset, BoundingBox bbox, int z) {
long[] i = gridSubset.getCoverageIntersection(z, bbox);
BoundingBox b1 = gridSubset.boundsFromIndex(new long[] {i[0], i[1], i[4]});
BoundingBox b2 = gridSubset.boundsFromIndex(new long[] {i[2], i[3], i[4]});
return new Envelope(
Math.min(b1.getMinX(), b2.getMinX()),
Math.max(b1.getMaxX(), b2.getMaxX()),
Math.min(b1.getMinY(), b2.getMinY()),
Math.max(b1.getMaxY(), b2.getMaxY()));
}
void addTileLayers(GeoPackage geopkg, List<MapLayerInfo> mapLayers, WMSMapContent map)
throws IOException {
if (mapLayers.isEmpty()) {
return;
}
// figure out a name for the file entry
String tileEntryName = null;
Map formatOpts = map.getRequest().getFormatOptions();
if (formatOpts.containsKey("tileset_name")) {
tileEntryName = (String) formatOpts.get("tileset_name");
}
if (tileEntryName == null) {
tileEntryName = map.getTitle();
}
if (tileEntryName == null && mapLayers.size() == 1) {
Iterator<MapLayerInfo> it = mapLayers.iterator();
tileEntryName = it.next().getLayerInfo().getName();
}
GridSubset gridSubset = findBestGridSubset(map);
int[] minmax = findMinMaxZoom(gridSubset, map);
BoundingBox bbox = bbox(map);
TileEntry e = new TileEntry();
e.setTableName(tileEntryName);
if (mapLayers.size() == 1) {
ResourceInfo r = mapLayers.get(0).getResource();
e.setIdentifier(r.getTitle());
e.setDescription(r.getAbstract());
}
e.setBounds(
new ReferencedEnvelope(
findTileBounds(gridSubset, bbox, minmax[0]), map.getCoordinateReferenceSystem()));
e.setSrid(srid(map));
GridSet gridSet = gridSubset.getGridSet();
for (int z = minmax[0]; z < minmax[1]; z++) {
Grid g = gridSet.getGrid(z);
TileMatrix m = new TileMatrix();
m.setZoomLevel(z);
m.setMatrixWidth((int) g.getNumTilesWide());
m.setMatrixHeight((int) g.getNumTilesHigh());
m.setTileWidth(gridSubset.getTileWidth());
m.setTileHeight(gridSubset.getTileHeight());
// TODO: not sure about this
m.setXPixelSize(g.getResolution());
m.setYPixelSize(g.getResolution());
// m.setXPixelSize(gridSet.getPixelSize());
// m.setYPixelSize(gridSet.getPixelSize());
e.getTileMatricies().add(m);
}
// figure out the actual bounds of the tiles to be renderered
LOGGER.fine("Creating tile entry" + e.getTableName());
geopkg.create(e);
// create a prototype getmap request
GetMapRequest req = new GetMapRequest();
OwsUtils.copy(map.getRequest(), req, GetMapRequest.class);
req.setLayers(mapLayers);
String imageFormat =
formatOpts.containsKey("format") ? parseFormatFromOpts(formatOpts) : findBestFormat(map);
req.setFormat(imageFormat);
req.setWidth(gridSubset.getTileWidth());
req.setHeight(gridSubset.getTileHeight());
// count tiles as we generate them
int ntiles = 0;
// flag determining if tile row indexes we store in database should be inverted
boolean flipy = Boolean.valueOf((String) formatOpts.get("flipy"));
for (int z = minmax[0]; z < minmax[1]; z++) {
long[] intersect = gridSubset.getCoverageIntersection(z, bbox);
for (long x = intersect[0]; x <= intersect[2]; x++) {
for (long y = intersect[1]; y <= intersect[3]; y++) {
BoundingBox box = gridSubset.boundsFromIndex(new long[] {x, y, z});
req.setBbox(new Envelope(box.getMinX(), box.getMaxX(), box.getMinY(), box.getMaxY()));
Tile t = new Tile();
t.setZoom(z);
t.setColumn((int) x);
t.setRow((int) (flipy ? gridSubset.getNumTilesHigh(z) - (y + 1) : y));
WebMap result = webMapService.getMap(req);
t.setData(toBytes(result));
geopkg.add(e, t);
// images we encode are actually kept around, we need to clean them up
if (ntiles++ == TILE_CLEANUP_INTERVAL) {
cleanUpImages();
ntiles = 0;
}
}
}
}
}