Render themes: SVG resources, closes #60

vtm-android-gdx/build.gradle

@@ -5,6 +5,7 @@ dependencies {
     compile project(':vtm-gdx')
     compile project(':vtm-themes')
     compile "com.badlogicgames.gdx:gdx-backend-android:$gdxVersion"
+    compile 'com.caverock:androidsvg:1.2.2-beta-1'
     compile 'com.noveogroup.android:android-logger:1.3.6'
 }
 

vtm-android-gdx/src/org/oscim/android/canvas/AndroidGraphics.java

@@ -55,6 +55,16 @@ public final class AndroidGraphics extends CanvasAdapter {
         return new AndroidBitmap(inputStream);
     }
 
+    @Override
+    public Bitmap decodeSvgBitmapImpl(InputStream inputStream) {
+        try {
+            return new AndroidSvgBitmap(inputStream);
+        } catch (IOException e) {
+            e.printStackTrace();
+            return null;
+        }
+    }
+
     @Override
     public Bitmap loadBitmapAssetImpl(String relativePathPrefix, String src) {
         try {

vtm-android-gdx/src/org/oscim/android/canvas/AndroidSvgBitmap.java

@@ -0,0 +1,59 @@
+/*
+ * Copyright 2016 devemux86
+ *
+ * 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.android.canvas;
+
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+import android.graphics.Picture;
+import android.graphics.RectF;
+
+import com.caverock.androidsvg.SVG;
+
+import org.oscim.backend.CanvasAdapter;
+
+import java.io.IOException;
+import java.io.InputStream;
+
+public class AndroidSvgBitmap extends AndroidBitmap {
+    private static final float DEFAULT_SIZE = 400f;
+
+    private static android.graphics.Bitmap getResourceBitmap(InputStream inputStream) throws IOException {
+        synchronized (SVG.getVersion()) {
+            try {
+                SVG svg = SVG.getFromInputStream(inputStream);
+                Picture picture = svg.renderToPicture();
+
+                float scaleFactor = CanvasAdapter.dpi / 160;
+                double scale = scaleFactor / Math.sqrt((picture.getHeight() * picture.getWidth()) / DEFAULT_SIZE);
+
+                float bitmapWidth = (float) (picture.getWidth() * scale);
+                float bitmapHeight = (float) (picture.getHeight() * scale);
+
+                android.graphics.Bitmap bitmap = android.graphics.Bitmap.createBitmap((int) Math.ceil(bitmapWidth),
+                        (int) Math.ceil(bitmapHeight), Bitmap.Config.ARGB_8888);
+                Canvas canvas = new Canvas(bitmap);
+                canvas.drawPicture(picture, new RectF(0, 0, bitmapWidth, bitmapHeight));
+
+                return bitmap;
+            } catch (Exception e) {
+                throw new IOException(e);
+            }
+        }
+    }
+
+    AndroidSvgBitmap(InputStream inputStream) throws IOException {
+        super(getResourceBitmap(inputStream));
+    }
+}