better solution for alpha. might still have some issue

Examples/Tests/index.ios.js

@@ -92,32 +92,59 @@ class Tests extends React.Component {
         </NativeLayer>
 
         <NativeLayer width={debugSize} height={debugSize}>
-          <Copy width={debugSize} height={debugSize}>
-            http://i.imgur.com/S22HNaU.png
+          <Image source={{ uri: "http://i.imgur.com/S22HNaU.png" }} width={debugSize} height={debugSize} />
+          <Copy width={debugSize} height={debugSize} opaque={false}>
+            http://i.imgur.com/mp79p5T.png
           </Copy>
-          <Image source={{ uri: "http://i.imgur.com/mp79p5T.png" }} width={debugSize} height={debugSize} />
         </NativeLayer>
 
         <NativeLayer width={debugSize} height={debugSize}>
           <Image source={{ uri: "http://i.imgur.com/S22HNaU.png" }} width={debugSize} height={debugSize} />
           <Copy width={debugSize} height={debugSize} opaque={false}>
+            <Copy>
               http://i.imgur.com/mp79p5T.png
             </Copy>
+          </Copy>
         </NativeLayer>
 
         <NativeLayer width={debugSize} height={debugSize}>
-          <Copy width={debugSize} height={debugSize}>
-            http://i.imgur.com/S22HNaU.png
+          <Image source={{ uri: "http://i.imgur.com/S22HNaU.png" }} width={debugSize} height={debugSize} />
+          <Copy width={debugSize} height={debugSize} opaque={false}>
+            <Copy>
+              <Copy>
+                http://i.imgur.com/mp79p5T.png
+              </Copy>
             </Copy>
+          </Copy>
+        </NativeLayer>
+
+        <NativeLayer width={debugSize} height={debugSize}>
+          <Image source={{ uri: "http://i.imgur.com/S22HNaU.png" }} width={debugSize} height={debugSize} />
           <Copy width={debugSize} height={debugSize} opaque={false}>
+            <Copy>
+              <Copy>
+                <Copy>
                   http://i.imgur.com/mp79p5T.png
                 </Copy>
+              </Copy>
+            </Copy>
+          </Copy>
         </NativeLayer>
 
-        <Layer width={debugSize} height={debugSize}>
-          {"http://i.imgur.com/S22HNaU.png"}
-          {"http://i.imgur.com/mp79p5T.png"}
-        </Layer>
+        <NativeLayer width={debugSize} height={debugSize}>
+          <Image source={{ uri: "http://i.imgur.com/S22HNaU.png" }} width={debugSize} height={debugSize} />
+          <Copy width={debugSize} height={debugSize} opaque={false}>
+            <Copy>
+              <Copy>
+                <Copy>
+                  <Copy>
+                    http://i.imgur.com/mp79p5T.png
+                  </Copy>
+                </Copy>
+              </Copy>
+            </Copy>
+          </Copy>
+        </NativeLayer>
       </View>
 
     </ScrollView>;

RNGL/GLCanvas.m

@@ -336,9 +336,6 @@ RCT_NOT_IMPLEMENTED(-init)
         [fbo bind];
       }
       
-      glClear(GL_COLOR_BUFFER_BIT);
-      glClearColor(0.0, 0.0,  0.0,  0.0);
-      
       [renderData.shader bind];
       
       for (NSString *uniformName in renderData.textures) {
@@ -351,22 +348,22 @@ RCT_NOT_IMPLEMENTED(-init)
         [renderData.shader setUniform:uniformName withValue:renderData.uniforms[uniformName]];
       }
       
+      glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
+      glClearColor(0.0, 0.0, 0.0, 0.0);
+      glClear(GL_COLOR_BUFFER_BIT);
+      
+      glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
       glDrawArrays(GL_TRIANGLES, 0, 6);
     };
     
     // DRAWING THE SCENE
     
-    glGetIntegerv(GL_FRAMEBUFFER_BINDING, &defaultFBO);
-    
-    glDisable(GL_BLEND);
-    
     [self syncContentTextures];
     
-    recDraw(_renderData);
-    
+    glGetIntegerv(GL_FRAMEBUFFER_BINDING, &defaultFBO);
     glEnable(GL_BLEND);
-    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
-    
+    recDraw(_renderData);
+    glDisable(GL_BLEND);
     glBindFramebuffer(GL_FRAMEBUFFER, defaultFBO);
   }
 }