Add support to base64 data from svg

use `svgRef.toDataURL(function (base64) {console.log(base64);});` to get
base64 data of svgRef

Example/examples/Svg.js

@@ -174,10 +174,12 @@ class SvgNativeMethods extends Component {
                     <Path d="M55.192 27.87l-5.825-1.092a17.98 17.98 0 0 0-1.392-3.37l3.37-4.928c.312-.456.248-1.142-.143-1.532l-4.155-4.156c-.39-.39-1.076-.454-1.532-.143l-4.928 3.37a18.023 18.023 0 0 0-3.473-1.42l-1.086-5.793c-.103-.543-.632-.983-1.185-.983h-5.877c-.553 0-1.082.44-1.185.983l-1.096 5.85a17.96 17.96 0 0 0-3.334 1.393l-4.866-3.33c-.456-.31-1.142-.247-1.532.144l-4.156 4.156c-.39.39-.454 1.076-.143 1.532l3.35 4.896a18.055 18.055 0 0 0-1.37 3.33L8.807 27.87c-.542.103-.982.632-.982 1.185v5.877c0 .553.44 1.082.982 1.185l5.82 1.09a18.013 18.013 0 0 0 1.4 3.4l-3.31 4.842c-.313.455-.25 1.14.142 1.53l4.155 4.157c.39.39 1.076.454 1.532.143l4.84-3.313c1.04.563 2.146 1.02 3.3 1.375l1.096 5.852c.103.542.632.982 1.185.982h5.877c.553 0 1.082-.44 1.185-.982l1.086-5.796c1.2-.354 2.354-.82 3.438-1.4l4.902 3.353c.456.313 1.142.25 1.532-.142l4.155-4.154c.39-.39.454-1.076.143-1.532l-3.335-4.874a18.016 18.016 0 0 0 1.424-3.44l5.82-1.09c.54-.104.98-.633.98-1.186v-5.877c0-.553-.44-1.082-.982-1.185zM32 42.085c-5.568 0-10.083-4.515-10.083-10.086 0-5.568 4.515-10.084 10.083-10.084 5.57 0 10.086 4.516 10.086 10.083 0 5.57-4.517 10.085-10.086 10.085z" fill="blue"/>
                 </G>
             </Svg>
-            <Image
-                source={{url: `data:image/png;base64,${this.state.base64}`}}
-                style={{width:150, height: 100, borderWidth: 1, marginTop: 5}}
-            />
+            <View style={{width:150, height: 100, borderWidth: 1, marginTop: 5}}>
+                {this.state.base64 && <Image
+                    source={{uri: `data:image/png;base64,${this.state.base64}`}}
+                    style={{width:150, height: 100}}
+                />}
+            </View>
         </View>;
     }
 }

README.md

@@ -579,6 +579,7 @@ npm install
 2. more Text features support (textPath, tref, tspan)
 3. Pattern element
 4. implement Animated elements
+5. more Image features support
 
 #### Thanks:
 

android/src/main/java/com/horcrux/svg/PropHelper.java

@@ -16,7 +16,6 @@ import android.graphics.RadialGradient;
 import android.graphics.LinearGradient;
 import android.graphics.Shader;
 import android.graphics.Matrix;
-import android.util.Log;
 
 import javax.annotation.Nullable;
 

android/src/main/java/com/horcrux/svg/RNSVGCircleShadowNode.java

@@ -12,7 +12,6 @@ package com.horcrux.svg;
 import android.graphics.Canvas;
 import android.graphics.Paint;
 import android.graphics.Path;
-import android.util.Log;
 
 import com.facebook.react.uimanager.annotations.ReactProp;
 

android/src/main/java/com/horcrux/svg/RNSVGEllipseShadowNode.java

@@ -13,7 +13,6 @@ import android.graphics.Canvas;
 import android.graphics.Paint;
 import android.graphics.Path;
 import android.graphics.RectF;
-import android.util.Log;
 
 import com.facebook.react.uimanager.annotations.ReactProp;
 

android/src/main/java/com/horcrux/svg/RNSVGGroupShadowNode.java

@@ -14,14 +14,12 @@ import android.graphics.Matrix;
 import android.graphics.Paint;
 import android.graphics.Path;
 import android.graphics.Point;
-import android.util.Log;
 import android.view.View;
 import android.view.ViewGroup;
 
 import com.facebook.react.bridge.ReadableArray;
 import com.facebook.react.uimanager.ReactShadowNode;
 
-import java.security.PublicKey;
 
 import javax.annotation.Nullable;
 

android/src/main/java/com/horcrux/svg/RNSVGLineShadowNode.java

@@ -14,8 +14,6 @@ import android.graphics.Paint;
 import android.graphics.Path;
 import com.facebook.react.uimanager.annotations.ReactProp;
 
-import javax.annotation.Nullable;
-
 /**
  * Shadow node for virtual RNSVGPath view
  */

android/src/main/java/com/horcrux/svg/RNSVGLinearGradientShadowNode.java

@@ -14,8 +14,6 @@ import com.facebook.react.bridge.ReadableArray;
 import com.facebook.react.bridge.WritableArray;
 import com.facebook.react.uimanager.annotations.ReactProp;
 
-import java.util.ArrayList;
-
 /**
  * Shadow node for virtual LinearGradient definition view
  */

android/src/main/java/com/horcrux/svg/RNSVGPathShadowNode.java

@@ -21,7 +21,6 @@ import android.graphics.Point;
 import android.graphics.RectF;
 
 import android.graphics.Color;
-import android.util.Log;
 import android.view.View;
 
 import com.facebook.common.logging.FLog;

android/src/main/java/com/horcrux/svg/RNSVGRectShadowNode.java

@@ -15,8 +15,6 @@ import android.graphics.Path;
 import android.graphics.RectF;
 import com.facebook.react.uimanager.annotations.ReactProp;
 
-import javax.annotation.Nullable;
-
 /**
  * Shadow node for virtual RNSVGPath view
  */

android/src/main/java/com/horcrux/svg/RNSVGRenderableView.java

@@ -13,8 +13,6 @@ import android.content.Context;
 import android.view.View;
 import android.view.ViewGroup;
 
-// NativeGestureUtil.notifyNativeGestureStarted
-
 /**
  * Custom {@link View} implementation that draws an RNSVGSvg React view and its \children.
  */

android/src/main/java/com/horcrux/svg/RNSVGSvgView.java

@@ -21,24 +21,41 @@ import android.view.View;
 import android.view.ViewGroup;
 
 import com.facebook.infer.annotation.Assertions;
+import com.facebook.react.bridge.Arguments;
+import com.facebook.react.bridge.ReactContext;
+import com.facebook.react.bridge.WritableMap;
 import com.facebook.react.common.SystemClock;
 import com.facebook.react.uimanager.ThemedReactContext;
 import com.facebook.react.uimanager.UIManagerModule;
+import com.facebook.react.uimanager.events.RCTEventEmitter;
 import com.facebook.react.uimanager.events.TouchEvent;
 import com.facebook.react.uimanager.events.TouchEventCoalescingKeyHelper;
 import com.facebook.react.uimanager.events.TouchEventType;
 import com.facebook.react.uimanager.events.EventDispatcher;
 
-// NativeGestureUtil.notifyNativeGestureStarted
 /**
  * Custom {@link View} implementation that draws an RNSVGSvg React view and its \children.
  */
 public class RNSVGSvgView extends ViewGroup {
 
+    public enum Events {
+        EVENT_DATA_URL("onDataURL");
+
+        private final String mName;
+
+        Events(final String name) {
+            mName = name;
+        }
+
+        @Override
+        public String toString() {
+            return mName;
+        }
+    }
+
     private @Nullable Bitmap mBitmap;
-
+    private RCTEventEmitter mEventEmitter;
     private RNSVGSvgViewShadowNode mSvgViewShadowNode;
-
     private int mTargetTag;
 
     private final TouchEventCoalescingKeyHelper mTouchEventCoalescingKeyHelper =
@@ -48,6 +65,11 @@ public class RNSVGSvgView extends ViewGroup {
         super(context);
     }
 
+    public RNSVGSvgView(ReactContext reactContext) {
+        super(reactContext);
+        mEventEmitter = reactContext.getJSModule(RCTEventEmitter.class);
+    }
+
     public void setBitmap(Bitmap bitmap) {
         if (mBitmap != null) {
             mBitmap.recycle();
@@ -183,4 +205,10 @@ public class RNSVGSvgView extends ViewGroup {
                 androidEvent.getY(),
                 mTouchEventCoalescingKeyHelper));
     }
+
+    public void onDataURL() {
+        WritableMap event = Arguments.createMap();
+        event.putString("base64", mSvgViewShadowNode.getBase64());
+        mEventEmitter.receiveEvent(getId(), Events.EVENT_DATA_URL.toString(), event);
+    }
 }

android/src/main/java/com/horcrux/svg/RNSVGSvgViewManager.java

@@ -10,29 +10,16 @@
 package com.horcrux.svg;
 
 import android.graphics.Bitmap;
-import android.telecom.Call;
-import android.util.Log;
-
-import com.facebook.react.bridge.Arguments;
-import com.facebook.react.bridge.ReactContext;
-import com.facebook.react.bridge.ReactMethod;
 import com.facebook.react.bridge.ReadableArray;
-import com.facebook.react.bridge.WritableMap;
-import com.facebook.react.uimanager.BaseViewManager;
-import com.facebook.react.uimanager.LayoutShadowNode;
-import com.facebook.react.uimanager.ReactStylesDiffMap;
-import com.facebook.react.uimanager.SimpleViewManager;
+import com.facebook.react.common.MapBuilder;
 import com.facebook.react.uimanager.ThemedReactContext;
 import com.facebook.react.uimanager.ViewGroupManager;
-import com.facebook.react.uimanager.ViewManagerPropertyUpdater;
-import com.facebook.react.uimanager.events.RCTEventEmitter;
 
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.Map;
 
 import javax.annotation.Nullable;
-import javax.security.auth.callback.Callback;
 
 /**
  * ViewManager for RNSVGSvgView React views. Renders as a {@link RNSVGSvgView} and handles
@@ -63,27 +50,27 @@ public class RNSVGSvgViewManager extends ViewGroupManager<RNSVGSvgView> {
         return commandsMap;
     }
 
+    @Override
+    @Nullable
+    public Map getExportedCustomDirectEventTypeConstants() {
+        MapBuilder.Builder builder = MapBuilder.builder();
+        for (RNSVGSvgView.Events event : RNSVGSvgView.Events.values()) {
+            builder.put(event.toString(), MapBuilder.of("registrationName", event.toString()));
+        }
+        return builder.build();
+    }
+
     @Override
     public void receiveCommand(RNSVGSvgView root, int commandId, @Nullable ReadableArray args) {
         super.receiveCommand(root, commandId, args);
 
         switch (commandId) {
             case COMMAND_TO_DATA_URL:
-                toDataURL(root);
+                root.onDataURL();
                 break;
         }
     }
 
-    private void toDataURL(RNSVGSvgView root) {
-        WritableMap event = Arguments.createMap();
-        event.putString("message", "MyMessage");
-        ReactContext reactContext = (ReactContext)root.getContext();
-        reactContext.getJSModule(RCTEventEmitter.class).receiveEvent(
-            root.getId(),
-            "onDataURL",
-            event);
-    }
-
 
     @Override
     public RNSVGSvgViewShadowNode createShadowNodeInstance() {

android/src/main/java/com/horcrux/svg/RNSVGSvgViewShadowNode.java

@@ -13,21 +13,17 @@ import android.graphics.Bitmap;
 import android.graphics.Canvas;
 import android.graphics.Paint;
 import android.graphics.Point;
-import android.graphics.Rect;
-import android.util.Log;
-import android.view.View;
+import android.util.Base64;
 import android.view.ViewGroup;
 
 import com.facebook.imagepipeline.request.ImageRequest;
 import com.facebook.react.uimanager.LayoutShadowNode;
-import com.facebook.react.uimanager.ReactShadowNode;
 import com.facebook.react.uimanager.UIViewOperationQueue;
 
+import java.io.ByteArrayOutputStream;
 import java.util.HashMap;
 import java.util.Map;
 
-import javax.annotation.Nonnull;
-
 /**
  * Shadow node for RNSVG virtual tree root - RNSVGSvgView
  */
@@ -57,6 +53,15 @@ public class RNSVGSvgViewShadowNode extends LayoutShadowNode {
         return bitmap;
     }
 
+    public String getBase64() {
+        Bitmap bitmap = (Bitmap)drawOutput();
+        ByteArrayOutputStream stream = new ByteArrayOutputStream();
+        bitmap.compress(Bitmap.CompressFormat.PNG, 100, stream);
+        bitmap.recycle();
+        byte[] bitmapBytes = stream.toByteArray();
+        return Base64.encodeToString(bitmapBytes, Base64.DEFAULT);
+    }
+
     /**
      * Draw all of the child nodes of this root node
      *

android/src/main/java/com/horcrux/svg/RNSVGTextShadowNode.java

@@ -21,7 +21,6 @@ import android.graphics.Rect;
 import android.graphics.RectF;
 import android.graphics.Typeface;
 import android.text.TextUtils;
-import android.util.Log;
 import android.view.View;
 
 import com.facebook.react.bridge.ReadableArray;

android/src/main/java/com/horcrux/svg/RNSVGUseShadowNode.java

@@ -11,7 +11,6 @@ package com.horcrux.svg;
 
 import android.graphics.Canvas;
 import android.graphics.Paint;
-import android.util.Log;
 
 import com.facebook.common.logging.FLog;
 import com.facebook.react.common.ReactConstants;

elements/Svg.js

@@ -8,10 +8,12 @@ import {
     StyleSheet,
     UIManager,
     findNodeHandle,
-    NativeModules
+    NativeModules,
+    Platform
 } from 'react-native';
 import ViewBox from './ViewBox';
 import _ from 'lodash';
+import createReactNativeComponentClass from 'react/lib/createReactNativeComponentClass';
 const RNSVGSvgViewManager = NativeModules.RNSVGSvgViewManager;
 
 // Svg - Root node of all Svg elements
@@ -39,6 +41,7 @@ class Svg extends Component{
         super(...arguments);
         id++;
         this.id = id;
+        this.onDataURLCallbacks = [];
     }
     measureInWindow = (...args) => {
         this.root.measureInWindow(...args);
@@ -56,8 +59,24 @@ class Svg extends Component{
         this.root.setNativeProps(...args);
     };
 
-    toDataURL = (callback = _.noop) => {
+
+    toDataURL = Platform.OS === 'ios' ? (callback = _.noop) => {
         RNSVGSvgViewManager.toDataURL(findNodeHandle(this.root), callback);
+    } : (callback = _.noop) => {
+        let node = findNodeHandle(this.root);
+        this.onDataURLCallbacks.push(callback);
+        UIManager.dispatchViewManagerCommand(
+            node,
+            UIManager.RNSVGSvgView.Commands.toDataURL,
+            null
+        );
+    };
+
+    _onDataURL = (e) => {
+        let callback;
+        while (callback = this.onDataURLCallbacks.shift()) {
+            callback(e.nativeEvent.base64);
+        }
     };
 
     render() {
@@ -99,6 +118,7 @@ class Svg extends Component{
                 },
                 dimensions
             ]}
+            onDataURL={this._onDataURL}
         >
             {content}
         </NativeSvgView>;
@@ -107,4 +127,5 @@ class Svg extends Component{
 
 const NativeSvgView = requireNativeComponent('RNSVGSvgView', null);
 
+
 export default Svg;