AtlasTest.java

package org.oscim.test.renderer;

import java.util.Arrays;

import org.oscim.backend.canvas.Color;
import org.oscim.backend.canvas.Paint.Cap;
import org.oscim.gdx.GdxMap;
import org.oscim.gdx.GdxMapApp;
import org.oscim.layers.GenericLayer;
import org.oscim.renderer.BucketRenderer;
import org.oscim.renderer.GLViewport;
import org.oscim.renderer.atlas.TextureAtlas;
import org.oscim.renderer.atlas.TextureAtlas.Rect;
import org.oscim.renderer.atlas.TextureAtlas.Slot;
import org.oscim.renderer.bucket.LineBucket;
import org.oscim.renderer.bucket.TextBucket;
import org.oscim.renderer.bucket.TextItem;
import org.oscim.theme.styles.LineStyle;
import org.oscim.theme.styles.TextStyle;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class AtlasTest extends GdxMap {

	@Override
	protected void createLayers() {
		mMap.setMapPosition(0, 0, 1 << 4);
		mMap.layers().add(new GenericLayer(mMap, new AtlasRenderLayer()));
	}

	public static void main(String[] args) {
		GdxMapApp.init();
		GdxMapApp.run(new AtlasTest(), null, 400);
	}

	static class AtlasRenderLayer extends BucketRenderer {

		Logger log = LoggerFactory.getLogger(AtlasRenderLayer.class);

		public AtlasRenderLayer() {

			TextureAtlas mAtlas = TextureAtlas.create(2048, 2048, 1);

			TextBucket tl = new TextBucket();
			TextStyle t = TextStyle.builder().fontSize(20).color(Color.BLACK).build();
			buckets.set(tl);

			LineBucket ll = buckets.getLineBucket(0);
			ll.line = new LineStyle(Color.BLUE, 3, Cap.BUTT);
			ll.scale = 1f;

			LineBucket ll2 = buckets.getLineBucket(1);
			ll2.line = new LineStyle(Color.RED, 3, Cap.BUTT);
			ll2.scale = 1f;

			LineBucket ll3 = buckets.getLineBucket(2);
			ll3.line = new LineStyle(Color.GREEN, 3, Cap.BUTT);
			ll3.scale = 1f;

			float[] points = new float[10];

			for (int i = 0; i < 400; i++) {
				int w = (int) (20 + Math.random() * 256);
				int h = (int) (20 + Math.random() * 56);
				Rect r = mAtlas.getRegion(w, h);
				if (r == null) {
					log.debug("no space left");
					continue;
				}
				r.x += 1;
				r.y += 1;

				points[0] = r.x;
				points[1] = r.y;
				points[2] = r.x + (r.w - 2);
				points[3] = r.y;
				points[4] = r.x + (r.w - 2);
				points[5] = r.y + (r.h - 2);
				points[6] = r.x;
				points[7] = r.y + (r.h - 2);
				points[8] = r.x;
				points[9] = r.y;
				ll.addLine(points, 10, false);

				r.x += 1;
				r.y += 1;
				points[0] = r.x;
				points[1] = r.y;
				points[2] = r.x + (w - 4);
				points[3] = r.y;
				points[4] = r.x + (w - 4);
				points[5] = r.y + (h - 4);
				points[6] = r.x;
				points[7] = r.y + (h - 4);
				points[8] = r.x;
				points[9] = r.y;

				log.debug("add region: " + Arrays.toString(points));
				ll2.addLine(points, 10, false);

				TextItem ti = TextItem.pool.get();
				ti.set(r.x + r.w / 2, r.y + r.h / 2, "" + i, t);
				ti.x1 = 0;
				ti.y1 = 1; // (short) (size / 2);
				ti.x2 = 1; // (short) size;
				ti.y2 = 1;
				tl.addText(ti);
			}

			for (Slot s = mAtlas.mSlots; s != null; s = s.next) {
				points[0] = s.x;
				points[1] = s.y;
				points[2] = s.x + s.w;
				points[3] = s.y;
				points[4] = s.x + s.w;
				points[5] = 2048;
				points[6] = s.x;
				points[7] = 2048;
				points[8] = s.x;
				points[9] = s.y;

				ll3.addLine(points, 10, false);
			}

			tl.prepare();
			//tl.labels = TextItem.pool.releaseAll(tl.labels);
		}

		boolean initial = true;

		@Override
		public void update(GLViewport v) {

			if (initial) {
				mMapPosition.copy(v.pos);
				initial = false;

				compile();
			}
		}
	}
}