8e01dce85e
- scale calculations look much nicer now, better always use 'double' unless you are sure about precision required - finally got rid of zoomLevel relative coordinates - cleanup MapPosition and MercatorProjection API functions
140 lines
3.4 KiB
Java
140 lines
3.4 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 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 License for more details.
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*
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* You should have received a copy of the GNU Lesser General 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.renderer;
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import org.oscim.generator.JobTile;
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import org.oscim.renderer.layer.Layers;
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import org.oscim.renderer.layer.TextItem;
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/**
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* Extends Tile class for concurrent use in TileManager,
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* TileGenerator and GLRenderer threads.
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*/
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public final class MapTile extends JobTile {
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public double x;
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public double y;
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/**
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* Tile data set by TileGenerator.
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*/
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public TextItem labels;
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public Layers layers;
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/**
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* Tile is in view region. Set by GLRenderer.
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*/
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public boolean isVisible;
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/**
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* Pointer to access relatives in QuadTree
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*/
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public QuadTree rel;
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int lastDraw = 0;
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// keep track which tiles are locked as proxy for this tile
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public final static int PROXY_CHILD1 = 1 << 0;
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public final static int PROXY_CHILD2 = 1 << 1;
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public final static int PROXY_CHILD3 = 1 << 2;
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public final static int PROXY_CHILD4 = 1 << 3;
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public final static int PROXY_PARENT = 1 << 4;
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public final static int PROXY_GRAMPA = 1 << 5;
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public final static int PROXY_HOLDER = 1 << 6;
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public byte proxies;
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// check which labels were joined
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// public final static int JOIN_T = 1 << 0;
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// public final static int JOIN_B = 1 << 1;
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// public final static int JOIN_L = 1 << 2;
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// public final static int JOIN_R = 1 << 3;
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// public final static int JOINED = 15;
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// public byte joined;
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// counting the tiles that use this tile as proxy
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byte refs;
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// up to 255 Threads may lock a tile
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byte locked;
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// only used GLRenderer when this tile sits in for another tile.
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// e.g. x:-1,y:0,z:1 for x:1,y:0
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MapTile holder;
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MapTile(int tileX, int tileY, byte zoomLevel) {
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super(tileX, tileY, zoomLevel);
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this.x = (double)tileX / (1 << zoomLevel);
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this.y = (double)tileY / (1 << zoomLevel);
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}
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/**
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* @return true if tile could be referenced by another thread
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*/
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boolean isLocked() {
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return locked > 0 || refs > 0;
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}
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void lock() {
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if (locked++ > 0)
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return;
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// lock all tiles that could serve as proxy
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MapTile p = rel.parent.tile;
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if (p != null && (p.state != 0)) {
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proxies |= PROXY_PARENT;
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p.refs++;
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}
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p = rel.parent.parent.tile;
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if (p != null && (p.state != 0)) {
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proxies |= PROXY_GRAMPA;
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p.refs++;
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}
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for (int j = 0; j < 4; j++) {
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if (rel.child[j] != null) {
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p = rel.child[j].tile;
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if (p != null && (p.state != 0)) {
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proxies |= (1 << j);
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p.refs++;
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}
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}
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}
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}
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void unlock() {
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if (--locked > 0 || proxies == 0)
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return;
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if ((proxies & PROXY_PARENT) != 0)
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rel.parent.tile.refs--;
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if ((proxies & PROXY_GRAMPA) != 0)
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rel.parent.parent.tile.refs--;
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for (int i = 0; i < 4; i++) {
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if ((proxies & (1 << i)) != 0)
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rel.child[i].tile.refs--;
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}
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proxies = 0;
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}
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public void addLabel(TextItem t){
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t.next = labels;
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labels = t;
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}
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}
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