546 lines
14 KiB
Java
546 lines
14 KiB
Java
/*
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* Copyright 2012, 2013 Hannes Janetzek
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*
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* This program is free software: you can redistribute it and/or modify it under the
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* terms of the GNU Lesser General Public License as published by the Free Software
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* Foundation, either version 3 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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* PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.oscim.layers.tile.vector;
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import static org.oscim.layers.tile.MapTile.STATE_NONE;
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import java.util.Arrays;
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import org.oscim.core.GeometryBuffer.GeometryType;
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import org.oscim.core.MapElement;
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import org.oscim.core.MercatorProjection;
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import org.oscim.core.Tag;
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import org.oscim.core.Tile;
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import org.oscim.database.IMapDatabase;
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import org.oscim.database.IMapDatabase.QueryResult;
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import org.oscim.database.IMapDatabaseCallback;
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import org.oscim.layers.tile.MapTile;
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import org.oscim.layers.tile.TileLoader;
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import org.oscim.layers.tile.TileManager;
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import org.oscim.renderer.sublayers.ExtrusionLayer;
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import org.oscim.renderer.sublayers.Layers;
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import org.oscim.renderer.sublayers.LineLayer;
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import org.oscim.renderer.sublayers.LineTexLayer;
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import org.oscim.renderer.sublayers.PolygonLayer;
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import org.oscim.renderer.sublayers.TextItem;
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import org.oscim.theme.IRenderCallback;
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import org.oscim.theme.IRenderTheme;
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import org.oscim.theme.renderinstruction.Area;
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import org.oscim.theme.renderinstruction.Circle;
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import org.oscim.theme.renderinstruction.Line;
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import org.oscim.theme.renderinstruction.LineSymbol;
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import org.oscim.theme.renderinstruction.RenderInstruction;
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import org.oscim.theme.renderinstruction.Symbol;
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import org.oscim.theme.renderinstruction.Text;
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import org.oscim.utils.LineClipper;
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import org.oscim.view.DebugSettings;
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import android.util.Log;
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/**
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* @note
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* 1. The MapWorkers call MapTileLoader.execute() to load a tile.
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* 2. The tile data will be loaded from current MapDatabase
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* 3. MapDatabase calls the IMapDatabaseCallback functions
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* implemented by MapTileLoader for WAY and POI items.
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* 4. these callbacks then call RenderTheme to get the matching style.
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* 5. RenderTheme calls IRenderCallback functions with style information
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* 6. Styled items become added to MapTile.layers... roughly
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*/
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public class MapTileLoader extends TileLoader implements IRenderCallback, IMapDatabaseCallback {
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private static final String TAG = MapTileLoader.class.getName();
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private static final double STROKE_INCREASE = Math.sqrt(2.5);
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private static final byte LAYERS = 11;
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public static final byte STROKE_MIN_ZOOM_LEVEL = 12;
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public static final byte STROKE_MAX_ZOOM_LEVEL = 17;
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// private static final Tag[] debugTagWay = { new Tag("debug", "way") };
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// private static final Tag[] debugTagArea = { new Tag("debug", "area") };
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// replacement for variable value tags that should not be matched by RenderTheme
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// FIXME make this general, maybe subclass tags
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private static final Tag mTagEmptyName = new Tag(Tag.TAG_KEY_NAME, null, false);
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private static final Tag mTagEmptyHouseNr = new Tag(Tag.TAG_KEY_HOUSE_NUMBER, null, false);
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// private final MapElement mDebugWay, mDebugPoint;
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private static DebugSettings debug;
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private IRenderTheme renderTheme;
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private int renderLevels;
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// current MapDatabase used by this MapTileLoader
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private IMapDatabase mMapDatabase;
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// currently processed tile
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private MapTile mTile;
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// currently processed MapElement
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private MapElement mElement;
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// current line layer (will be used for following outline layers)
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private LineLayer mCurLineLayer;
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private int mDrawingLayer;
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private float mStrokeScale = 1.0f;
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private float mLatScaleFactor;
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private float mGroundResolution;
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private Tag mTagName;
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private Tag mTagHouseNr;
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private final LineClipper mClipper;
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public void setRenderTheme(IRenderTheme theme) {
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renderTheme = theme;
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renderLevels = theme.getLevels();
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}
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public static void setDebugSettings(DebugSettings debugSettings) {
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debug = debugSettings;
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}
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/**
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*/
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public MapTileLoader(TileManager tileManager) {
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super(tileManager);
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mClipper = new LineClipper(0, 0, Tile.SIZE, Tile.SIZE, true);
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// MapElement m = mDebugWay = new MapElement();
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// m.startLine();
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// int s = Tile.SIZE;
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// m.addPoint(0, 0);
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// m.addPoint(0, s);
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// m.addPoint(s, s);
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// m.addPoint(s, 0);
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// m.addPoint(0, 0);
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// m.tags = new Tag[] { new Tag("debug", "box") };
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// m.type = GeometryType.LINE;
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//
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// m = mDebugPoint = new MapElement();
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// m.startPoints();
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// m.addPoint(s >> 1, 10);
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// m.type = GeometryType.POINT;
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}
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/* (non-Javadoc)
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* @see org.oscim.layers.tile.TileLoader#cleanup()
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*/
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@Override
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public void cleanup() {
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mMapDatabase.close();
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}
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/* (non-Javadoc)
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* @see org.oscim.layers.tile.TileLoader#executeJob(org.oscim.layers.tile.MapTile)
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*/
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@Override
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public boolean executeJob(MapTile mapTile) {
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if (mMapDatabase == null)
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return false;
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mTile = mapTile;
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if (mTile.layers != null) {
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// should be fixed now.
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Log.d(TAG, "BUG tile already loaded " + mTile + " " + mTile.state);
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mTile = null;
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return false;
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}
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setScaleStrokeWidth(mTile.zoomLevel);
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// account for area changes with latitude
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double latitude = MercatorProjection.toLatitude(mTile.y);
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mLatScaleFactor = 0.4f + 0.6f * ((float) Math.sin(Math.abs(latitude) * (Math.PI / 180)));
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mGroundResolution = (float) (Math.cos(latitude * (Math.PI / 180))
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* MercatorProjection.EARTH_CIRCUMFERENCE
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/ ((long) Tile.SIZE << mTile.zoomLevel));
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mTile.layers = new Layers();
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// query database, which calls renderWay and renderPOI
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// callbacks while processing map tile data.
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if (mMapDatabase.executeQuery(mTile, this) != QueryResult.SUCCESS) {
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//Log.d(TAG, "Failed loading: " + tile);
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mTile.layers.clear();
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mTile.layers = null;
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TextItem.pool.releaseAll(mTile.labels);
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mTile.labels = null;
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// FIXME add STATE_FAILED?
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// in passTile everything but STATE_LOADING is considered failed.
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mTile.state = STATE_NONE;
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mTile = null;
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return false;
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}
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// if (debug.drawTileFrames) {
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// // draw tile coordinate
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// mTagName = new Tag("name", mTile.toString(), false);
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// mElement = mDebugPoint;
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// RenderInstruction[] ri;
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// ri = renderTheme.matchNode(debugTagWay, (byte) 0);
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// renderNode(ri);
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//
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// // draw tile box
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// mElement = mDebugWay;
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// mDrawingLayer = 100 * renderLevels;
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// ri = renderTheme.matchWay(mDebugWay.tags, (byte) 0, false);
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// renderWay(ri);
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// }
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mTile = null;
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return true;
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}
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Tag[] mFilterTags = new Tag[1];
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private static int getValidLayer(int layer) {
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if (layer < 0) {
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return 0;
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} else if (layer >= LAYERS) {
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return LAYERS - 1;
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} else {
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return layer;
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}
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}
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/**
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* Sets the scale stroke factor for the given zoom level.
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*
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* @param zoomLevel
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* the zoom level for which the scale stroke factor should be
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* set.
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*/
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private void setScaleStrokeWidth(byte zoomLevel) {
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mStrokeScale = (float) Math.pow(STROKE_INCREASE, zoomLevel - STROKE_MIN_ZOOM_LEVEL);
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if (mStrokeScale < 1)
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mStrokeScale = 1;
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}
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public void setMapDatabase(IMapDatabase mapDatabase) {
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if (mMapDatabase != null)
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mMapDatabase.close();
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mMapDatabase = mapDatabase;
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}
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public IMapDatabase getMapDatabase() {
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return mMapDatabase;
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}
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private boolean mRenderBuildingModel;
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// Replace tags that should only be matched by key in RenderTheme
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// to avoid caching RenderInstructions for each way of the same type
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// only with different name.
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// Maybe this should be done within RenderTheme, also allowing
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// to set these replacement rules in theme file.
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private boolean filterTags(Tag[] tags) {
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mRenderBuildingModel = false;
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for (int i = 0; i < tags.length; i++) {
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String key = tags[i].key;
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if (tags[i].key == Tag.TAG_KEY_NAME) {
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if (tags[i].value != null) {
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mTagName = tags[i];
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tags[i] = mTagEmptyName;
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}
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} else if (tags[i].key == Tag.TAG_KEY_HOUSE_NUMBER) {
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if (tags[i].value != null) {
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mTagHouseNr = tags[i];
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tags[i] = mTagEmptyHouseNr;
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}
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} else if (mTile.zoomLevel >= 17 &&
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// FIXME, allow overlays to intercept
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// this, or use a theme option for this
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key == Tag.TAG_KEY_BUILDING) {
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mRenderBuildingModel = true;
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}
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}
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return true;
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}
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// ---------------- MapDatabaseCallback -----------------
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@Override
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public void renderElement(MapElement element) {
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clearState();
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mElement = element;
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if (element.type == GeometryType.POINT) {
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// remove tags that should not be cached in Rendertheme
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filterTags(element.tags);
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// get render instructions
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//RenderInstruction[] ri = renderTheme.matchNode(element.tags, mTile.zoomLevel);
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RenderInstruction[] ri = renderTheme.matchElement(element, mTile.zoomLevel);
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if (ri != null)
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renderNode(ri);
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}
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else {
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// replace tags that should not be cached in Rendertheme (e.g. name)
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if (!filterTags(element.tags))
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return;
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boolean closed = element.type == GeometryType.POLY;
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mDrawingLayer = getValidLayer(element.layer) * renderLevels;
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// get render instructions
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// RenderInstruction[] ri = renderTheme.matchWay(element.tags,
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// (byte) (mTile.zoomLevel + 0), closed);
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RenderInstruction[] ri = renderTheme.matchElement(element, mTile.zoomLevel);
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renderWay(ri);
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if (debug.debugTheme && ri == null)
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debugUnmatched(closed, element.tags);
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mCurLineLayer = null;
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}
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mElement = null;
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}
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private void debugUnmatched(boolean closed, Tag[] tags) {
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Log.d(TAG, "DBG way not matched: " + closed + " "
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+ Arrays.deepToString(tags));
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mElement = null;
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// mTagName = new Tag("name", tags[0].key + ":"
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// + tags[0].value, false);
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//
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// RenderInstruction[] ri;
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// ri = renderTheme.matchWay(closed ? debugTagArea : debugTagWay,
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// (byte) 0, true);
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//
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// renderWay(ri);
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}
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private void renderWay(RenderInstruction[] ri) {
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if (ri == null)
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return;
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for (int i = 0, n = ri.length; i < n; i++)
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ri[i].renderWay(this);
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}
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private void renderNode(RenderInstruction[] ri) {
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if (ri == null)
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return;
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for (int i = 0, n = ri.length; i < n; i++)
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ri[i].renderNode(this);
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}
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private void clearState() {
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mTagName = null;
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mTagHouseNr = null;
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mCurLineLayer = null;
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}
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// @Override
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// public void renderWaterBackground() {
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// }
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// ----------------- RenderThemeCallback -----------------
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@Override
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public void renderWay(Line line, int level) {
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int numLayer = (mDrawingLayer * 2) + level;
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if (line.stipple == 0) {
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if (line.outline && mCurLineLayer == null) {
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Log.e(TAG, "BUG in theme: line must come before outline!");
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return;
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}
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LineLayer lineLayer = mTile.layers.getLineLayer(numLayer);
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if (lineLayer == null)
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return;
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if (lineLayer.line == null) {
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lineLayer.line = line;
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float w = line.width;
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if (!line.fixed) {
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w *= mStrokeScale;
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w *= mLatScaleFactor;
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}
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lineLayer.width = w;
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}
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if (line.outline) {
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lineLayer.addOutline(mCurLineLayer);
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return;
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}
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lineLayer.addLine(mElement.points, mElement.index,
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mElement.type == GeometryType.POLY);
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// keep reference for outline layer
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mCurLineLayer = lineLayer;
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} else {
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LineTexLayer lineLayer = mTile.layers.getLineTexLayer(numLayer);
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if (lineLayer == null)
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return;
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if (lineLayer.line == null) {
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lineLayer.line = line;
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float w = line.width;
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if (!line.fixed) {
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w *= mStrokeScale;
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w *= mLatScaleFactor;
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}
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lineLayer.width = w;
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}
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lineLayer.addLine(mElement.points, mElement.index);
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}
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}
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@Override
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public void renderArea(Area area, int level) {
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int numLayer = mDrawingLayer + level;
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if (mRenderBuildingModel) {
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//Log.d(TAG, "add buildings: " + mTile + " " + mPriority);
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if (mTile.layers.extrusionLayers == null)
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mTile.layers.extrusionLayers = new ExtrusionLayer(0, mGroundResolution);
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((ExtrusionLayer) mTile.layers.extrusionLayers).addBuildings(mElement);
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return;
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}
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if (debug.disablePolygons)
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return;
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PolygonLayer layer = mTile.layers.getPolygonLayer(numLayer);
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if (layer == null)
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return;
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if (layer.area == null)
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layer.area = area;
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layer.addPolygon(mElement.points, mElement.index);
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}
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private String textValueForKey(Text text) {
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String value = null;
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if (text.textKey == Tag.TAG_KEY_NAME) {
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if (mTagName != null)
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value = mTagName.value;
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} else if (text.textKey == Tag.TAG_KEY_HOUSE_NUMBER) {
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if (mTagHouseNr != null)
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value = mTagHouseNr.value;
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}
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return value;
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}
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@Override
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public void renderAreaCaption(Text text) {
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// TODO place somewhere on polygon
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String value = textValueForKey(text);
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if (value == null)
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return;
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float x = mElement.points[0];
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float y = mElement.points[1];
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mTile.addLabel(TextItem.pool.get().set(x, y, value, text));
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}
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@Override
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public void renderPointOfInterestCaption(Text text) {
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String value = textValueForKey(text);
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if (value == null)
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return;
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for (int i = 0, n = mElement.index[0]; i < n; i += 2) {
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float x = mElement.points[i];
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float y = mElement.points[i + 1];
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mTile.addLabel(TextItem.pool.get().set(x, y, value, text));
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}
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}
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@Override
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public void renderWayText(Text text) {
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String value = textValueForKey(text);
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if (value == null)
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return;
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int offset = 0;
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for (int i = 0, n = mElement.index.length; i < n; i++) {
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int length = mElement.index[i];
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if (length < 4)
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break;
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WayDecorator.renderText(mClipper, mElement.points, value, text,
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offset, length, mTile);
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offset += length;
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}
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}
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@Override
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public void renderPointOfInterestCircle(Circle circle, int level) {
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}
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@Override
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public void renderPointOfInterestSymbol(Symbol symbol) {
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// Log.d(TAG, "add symbol");
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// if (mLayers.textureLayers == null)
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// mLayers.textureLayers = new SymbolLayer();
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//
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// SymbolLayer sl = (SymbolLayer) mLayers.textureLayers;
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//
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// SymbolItem it = SymbolItem.get();
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// it.x = mPoiX;
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// it.y = mPoiY;
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// it.bitmap = bitmap;
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// it.billboard = true;
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//
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// sl.addSymbol(it);
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}
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@Override
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public void renderAreaSymbol(Symbol symbol) {
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}
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@Override
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public void renderWaySymbol(LineSymbol symbol) {
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}
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}
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