Render themes: store theme origin, fix #414

vtm-playground/src/org/oscim/test/DebugTheme.java

@@ -0,0 +1,52 @@
+package org.oscim.test;
+
+import org.oscim.backend.canvas.Color;
+import org.oscim.core.GeometryBuffer.GeometryType;
+import org.oscim.core.TagSet;
+import org.oscim.theme.IRenderTheme;
+import org.oscim.theme.styles.AreaStyle;
+import org.oscim.theme.styles.LineStyle;
+import org.oscim.theme.styles.RenderStyle;
+
+public class DebugTheme implements IRenderTheme {
+
+    private final static LineStyle[] line = {new LineStyle(1, Color.MAGENTA, 2)};
+    private final static AreaStyle[] area = {new AreaStyle(0, Color.CYAN)};
+
+    @Override
+    public RenderStyle[] matchElement(GeometryType type, TagSet tags, int zoomLevel) {
+        if (type == GeometryType.LINE)
+            return line;
+        if (type == GeometryType.POLY)
+            return area;
+
+        return null;
+    }
+
+    @Override
+    public void dispose() {
+    }
+
+    @Override
+    public int getLevels() {
+        return 0;
+    }
+
+    @Override
+    public int getMapBackground() {
+        return 0;
+    }
+
+    @Override
+    public boolean isMapsforgeTheme() {
+        return false;
+    }
+
+    @Override
+    public void scaleTextSize(float scaleFactor) {
+    }
+
+    @Override
+    public void updateStyles() {
+    }
+}