start of MeshLayer for 2D Meshes w/ tessellation

vtm/src/org/oscim/renderer/elements/ElementLayers.java

@@ -32,9 +32,13 @@ public class ElementLayers {
 		PolygonLayer.Renderer.init();
 		TextureLayer.Renderer.init();
 		BitmapLayer.Renderer.init();
+		MeshLayer.Renderer.init();
+
 		TextureItem.init(gl, 0);
 	}
 
+	// FIXME use one ArrayList for these!
+
 	// mixed Polygon- and LineLayer
 	public RenderElement baseLayers;
 	// Text- and SymbolLayer
@@ -87,6 +91,14 @@ public class ElementLayers {
 		return (LineLayer) getLayer(level, RenderElement.LINE);
 	}
 
+	/**
+	 * Get or add the MeshLayer for a level. Levels are ordered from
+	 * bottom (0) to top
+	 */
+	public MeshLayer getMeshLayer(int level) {
+		return (MeshLayer) getLayer(level, RenderElement.MESH);
+	}
+
 	/**
 	 * Get or add the PolygonLayer for a level. Levels are ordered from
 	 * bottom (0) to top
@@ -115,6 +127,12 @@ public class ElementLayers {
 		RenderElement l = baseLayers;
 		RenderElement renderElement = null;
 
+		if (!(type == RenderElement.LINE
+		        || type == RenderElement.POLYGON
+		        || type == RenderElement.TEXLINE
+		        || type == RenderElement.MESH))
+			throw new IllegalArgumentException("invalid layer type");
+
 		if (mCurLayer != null && mCurLayer.level == level) {
 			renderElement = mCurLayer;
 		} else {
@@ -146,9 +164,8 @@ public class ElementLayers {
 					renderElement = new PolygonLayer(level);
 				else if (type == RenderElement.TEXLINE)
 					renderElement = new LineTexLayer(level);
-				else
+				else if (type == RenderElement.MESH)
-					// TODO throw execption
+					renderElement = new MeshLayer(level);
-					return null;
 
 				if (l == null) {
 					// insert at start
@@ -177,6 +194,7 @@ public class ElementLayers {
 	private final static int[] VERTEX_SHORT_CNT = {
 	        4, // LINE_VERTEX_SHORTS
 	        2, // POLY_VERTEX_SHORTS
+	        2, // MESH_VERTEX_SHORTS
 	        6, // TEXLINE_VERTEX_SHORTS
 	};
 
@@ -212,6 +230,7 @@ public class ElementLayers {
 		size += addLayerItems(sbuf, baseLayers, RenderElement.LINE, 0);
 
 		texLineOffset = size * SHORT_BYTES;
+
 		for (RenderElement l = baseLayers; l != null; l = l.next) {
 			if (l.type == RenderElement.TEXLINE) {
 				addPoolItems(l, sbuf);
@@ -221,9 +240,14 @@ public class ElementLayers {
 			}
 		}
 
+		for (RenderElement l = baseLayers; l != null; l = l.next) {
+			if (l.type == RenderElement.MESH)
+				l.compile(sbuf);
+		}
+
 		for (RenderElement l = textureLayers; l != null; l = l.next) {
-			TextureLayer tl = (TextureLayer) l;
+			//TextureLayer tl = (TextureLayer) l;
-			tl.compile(sbuf);
+			l.compile(sbuf);
 		}
 
 		// extrusion layers are compiled by extrusion overlay

vtm/src/org/oscim/renderer/elements/MeshLayer.java

@@ -15,91 +15,165 @@
 package org.oscim.renderer.elements;
 
 import java.nio.ShortBuffer;
-import java.util.Arrays;
 
+import org.oscim.backend.GL20;
 import org.oscim.backend.Log;
+import org.oscim.backend.canvas.Color;
 import org.oscim.core.GeometryBuffer;
-import org.oscim.core.Tile;
+import org.oscim.core.MapPosition;
+import org.oscim.renderer.BufferObject;
+import org.oscim.renderer.GLState;
+import org.oscim.renderer.GLUtils;
+import org.oscim.renderer.MapRenderer;
+import org.oscim.renderer.MapRenderer.Matrices;
+import org.oscim.utils.Tessellator;
+import org.oscim.utils.pool.Inlist;
 
 public class MeshLayer extends RenderElement {
-	GeometryBuffer mGeom = new GeometryBuffer(10, 10);
+	private static final String TAG = MeshLayer.class.getName();
 
-	public MeshLayer() {
+	BufferObject indicesVbo;
-		GeometryBuffer e = mGeom;
+	int numIndices;
 
-		int size = Tile.SIZE;
+	VertexItem indiceItems;
 
-		float x1 = -1;
+	public MeshLayer(int level) {
-		float y1 = -1;
+		super(RenderElement.MESH);
-		float x2 = size + 1;
+		this.level = level;
-		float y2 = size + 1;
-
-		// always clear geometry before starting
-		// a different type.
-		e.clear();
-		e.startPolygon();
-		e.addPoint(x1, y1);
-		e.addPoint(x2, y1);
-		e.addPoint(x2, y2);
-		e.addPoint(x1, y2);
-
-		y1 = 5;
-		y2 = size - 5;
-		x1 = 5;
-		x2 = size - 5;
-
-		e.startHole();
-		e.addPoint(x1, y1);
-		e.addPoint(x2, y1);
-		e.addPoint(x2, y2);
-		e.addPoint(x1, y2);
-
-		addMesh(e);
 	}
 
 	public void addMesh(GeometryBuffer geom) {
-		int numRings = 2;
+		if (vertexItems == null) {
-
+			vertexItems = VertexItem.pool.get();
-		long ctx = tessellate(geom.points, 0, geom.index, 0, numRings);
+			indiceItems = VertexItem.pool.get();
-
-		short[] coordinates = new short[100];
-
-		while (tessGetCoordinates(ctx, coordinates, 2) > 0) {
-			Log.d("..", Arrays.toString(coordinates));
 		}
 
-		while (tessGetIndices(ctx, coordinates) > 0) {
+		numIndices += Tessellator.tessellate(geom, MapRenderer.COORD_SCALE,
-			Log.d("..", Arrays.toString(coordinates));
+		                                     Inlist.last(vertexItems),
-		}
+		                                     Inlist.last(indiceItems),
+		                                     verticesCnt);
 
-		tessFinish(ctx);
+		verticesCnt = vertexItems.getSize() / 2;
+
+		Log.d(TAG, "-> " + verticesCnt + " " + numIndices);
+
+		if (numIndices <= 0) {
+			vertexItems.release();
+			vertexItems = null;
+
+			indiceItems.release();
+			indiceItems = null;
+		}
 	}
 
 	@Override
 	protected void compile(ShortBuffer sbuf) {
+		if (indiceItems == null) {
 
+			return;
+		}
+		Log.d(TAG, "compile");
+		// add vertices to shared VBO
+		ElementLayers.addPoolItems(this, sbuf);
+
+		int cnt = indiceItems.getSize();
+
+		Log.d(TAG, "check " + cnt + ":" + numIndices);
+
+		if (cnt != numIndices) {
+			numIndices = cnt;
+		}
+
+		// add indices to indicesVbo
+		sbuf = MapRenderer.getShortBuffer(numIndices);
+
+		for (VertexItem it = indiceItems; it != null; it = it.next)
+			sbuf.put(it.vertices, 0, it.used);
+
+		VertexItem.pool.releaseAll(indiceItems);
+		indiceItems = null;
+
+		sbuf.flip();
+
+		indicesVbo = BufferObject.get(GL20.GL_ELEMENT_ARRAY_BUFFER, 0);
+		indicesVbo.loadBufferData(sbuf, sbuf.limit() * 2);
 	}
 
 	@Override
 	protected void clear() {
+		BufferObject.release(indicesVbo);
+		VertexItem.pool.releaseAll(indiceItems);
+		VertexItem.pool.releaseAll(vertexItems);
 
+		indiceItems = null;
+		vertexItems = null;
+		indicesVbo = null;
 	}
 
-	/**
+	public static class Renderer {
-	 * @param points an array of x,y coordinates
+		private static int shaderProgram;
-	 * @param pos position in points array
+		private static int hMatrix;
-	 * @param index geom indices
+		private static int hColor;
-	 * @param ipos position in index array
+		private static int hVertexPosition;
-	 * @param numRings number of rings in polygon == outer(1) + inner rings
-	 * @return number of triangles in io buffer
-	 */
-	public static native int tessellate(float[] points, int pos,
-	        short[] index, int ipos, int numRings);
 
-	public static native void tessFinish(long ctx);
+		static boolean init() {
+			shaderProgram = GLUtils.createProgram(vertexShader, fragmentShader);
+			if (shaderProgram == 0)
+				return false;
 
-	public static native int tessGetCoordinates(long ctx, short[] coordinates, float scale);
+			hMatrix = GL.glGetUniformLocation(shaderProgram, "u_mvp");
+			hColor = GL.glGetUniformLocation(shaderProgram, "u_color");
+			hVertexPosition = GL.glGetAttribLocation(shaderProgram, "a_pos");
+			return true;
+		}
 
-	public static native int tessGetIndices(long ctx, short[] indices);
+		public static RenderElement draw(MapPosition pos, RenderElement layer,
+		        Matrices m) {
 
+			GLState.blend(true);
+
+			RenderElement l = layer;
+
+			GLState.useProgram(shaderProgram);
+
+			GLState.enableVertexArrays(hVertexPosition, -1);
+
+			//m.viewproj.setAsUniform(hMatrix);
+			//m.useScreenCoordinates(true, 1f);
+			m.mvp.setAsUniform(hMatrix);
+
+			GLUtils.setColor(hColor, Color.BLUE, 0.4f);
+
+			for (; l != null && l.type == RenderElement.MESH; l = l.next) {
+				MeshLayer ml = (MeshLayer) l;
+
+				ml.indicesVbo.bind();
+
+				GL.glVertexAttribPointer(hVertexPosition, 2, GL20.GL_SHORT,
+				                         false, 0, ml.offset);
+
+				GL.glDrawElements(GL20.GL_TRIANGLES, ml.numIndices,
+				                  GL20.GL_UNSIGNED_SHORT, 0);
+			}
+
+			GL.glBindBuffer(GL20.GL_ELEMENT_ARRAY_BUFFER, 0);
+
+			return l;
+		}
+
+		private final static String vertexShader = ""
+		        + "precision mediump float;"
+		        + "uniform mat4 u_mvp;"
+		        + "attribute vec4 a_pos;"
+		        + "void main() {"
+		        + "  gl_Position = u_mvp * a_pos;"
+		        + "}";
+
+		private final static String fragmentShader = ""
+		        + "precision mediump float;"
+		        + "uniform vec4 u_color;"
+		        + "void main() {"
+		        + "  gl_FragColor = u_color;"
+		        + "}";
+	}
 }

vtm/src/org/oscim/renderer/elements/RenderElement.java

@@ -24,10 +24,11 @@ public abstract class RenderElement extends Inlist<RenderElement> {
 
 	public final static byte LINE = 0;
 	public final static byte POLYGON = 1;
-	public final static byte TEXLINE = 2;
+	public static final byte MESH = 2;
-	public final static byte SYMBOL = 3;
+	public final static byte TEXLINE = 3;
-	public final static byte BITMAP = 4;
+	public final static byte SYMBOL = 4;
-	public final static byte EXTRUSION = 5;
+	public final static byte BITMAP = 5;
+	public final static byte EXTRUSION = 6;
 
 	protected RenderElement(byte type) {
 		this.type = type;