/*
* Copyright 2012 Hannes Janetzek
*
* This file is part of the OpenScienceMap project (http://www.opensciencemap.org).
*
* This program is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.oscim.layers.tile.vector.labeling;
// TODO
// 1. rewrite. seriously
// 1.1 test if label is actually visible
// 2. compare previous to current state
// 2.1 test for new labels to be placed
// 2.2 handle collisions
// 2.3 try to place labels along a way
// 2.4 use 4 point labeling
// 3 join segments that belong to one feature
// 4 handle zoom-level changes
// 5 QuadTree might be handy
//
import org.oscim.layers.tile.vector.labeling.LabelLayer.Worker;
import org.oscim.renderer.BucketRenderer;
import org.oscim.renderer.GLState;
import org.oscim.renderer.GLViewport;
import org.oscim.renderer.bucket.RenderBucket;
import org.oscim.renderer.bucket.TextureBucket;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
class TextRenderer extends BucketRenderer {
static final Logger log = LoggerFactory.getLogger(TextRenderer.class);
static final boolean dbg = false;
private final Worker mWorker;
public TextRenderer(Worker worker) {
mWorker = worker;
}
long lastDraw = 0;
@Override
public synchronized void update(GLViewport v) {
LabelTask t;
synchronized (mWorker) {
t = mWorker.poll();
if (t == null) {
if (!mWorker.isRunning()) {
mWorker.submit(50);
}
return;
}
buckets.clear();
}
// set new TextLayer to be uploaded and rendered
buckets.set(t.layers);
mMapPosition = t.pos;
compile();
}
@Override
public synchronized void render(GLViewport v) {
GLState.test(false, false);
//Debug.draw(pos, layers);
buckets.vbo.bind();
float scale = (float) (v.pos.scale / mMapPosition.scale);
setMatrix(v, false);
for (RenderBucket l = buckets.get(); l != null;)
l = TextureBucket.Renderer.draw(l, v, scale);
}
}