Hide quantize options if original image. Fixes #120.

src/components/Options/index.tsx

@@ -112,23 +112,27 @@ export default class Options extends Component<Props, State> {
 
     return (
       <div class={`${style.options}${className ? (' ' + className) : ''}`}>
-        <p>Quantization</p>
+        {encoderState.type !== 'identity' && (
-        <label>
+          <div>
-          <input
+            <p>Quantization</p>
-            name="quantizer.enable"
+            <label>
-            type="checkbox"
+              <input
-            checked={!!preprocessorState.quantizer.enabled}
+                name="quantizer.enable"
-            onChange={this.onPreprocessorEnabledChange}
+                type="checkbox"
-          />
+                checked={!!preprocessorState.quantizer.enabled}
-          Enable
+                onChange={this.onPreprocessorEnabledChange}
-        </label>
+              />
-        {preprocessorState.quantizer.enabled &&
+              Enable
-          <QuantizerOptionsComponent
+            </label>
-            options={preprocessorState.quantizer}
+            {preprocessorState.quantizer.enabled &&
-            onChange={this.onQuantizerOptionsChange}
+              <QuantizerOptionsComponent
-          />
+                options={preprocessorState.quantizer}
-        }
+                onChange={this.onQuantizerOptionsChange}
-        <hr/>
+              />
+            }
+            <hr/>
+          </div>
+        )}
         <label>
           Mode:
           {encoderSupportMap ?