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+---
+title: CameraControl.autoFocus()
+slug: Web/API/CameraControl/autoFocus
+translation_of: Archive/B2G_OS/API/CameraControl/autoFocus
+---
+<p>{{APIRef("Camera API")}}{{ non-standard_header() }}{{B2GOnlyHeader2('privileged')}}</p>
+
+<h2 id="Resumo">Resumo</h2>
+
+<p>This method attempts to focus the camera. If the camera is able to attempt to focus, a success callback is issued, regardless of whether or not the focusing attempt succeeds. If unable to attempt to focus, an error callback is performed instead.</p>
+
+<p>The success or failure of the focus operation is indicated by the value of a parameter passed into the callback function.</p>
+
+<h2 id="Sintaxe">Sintaxe</h2>
+
+<pre>CameraControl.autoFocus(onsuccess[, onerror]);</pre>
+
+<h3 id="Parametros">Parametros</h3>
+
+<dl>
+ <dt><code>onsuccess</code></dt>
+ <dd>A callback function called when a focus attempt is made</dd>
+ <dt><code>onerror</code> {{optional_inline()}}</dt>
+ <dd>An optional callback function that accepts an error string as an input parameter; this is called if it's not possible to attempt to focus the camera.</dd>
+</dl>
+
+<h2 id="Exemplo">Exemplo</h2>
+
+<pre class="brush: js">function onFocusPossible( success ) {
+  if ( success ) {
+    console.log("The image has been focused");
+  } else {
+    console.log("The image has not been focused");
+  }
+}
+
+function onFocusNotPossible( error ) {
+  console.log("The camera is not able to focus anything");
+  console.log( error );
+}
+
+function onAccessCamera( camera ) {
+  camera.autoFocus(onFocusPossible, onFocusNotPossible);
+};
+
+var options = {
+  camera: navigator.mozCameras.getListOfCameras()[0]
+};
+
+navigator.mozCameras.getCamera(options, onAccessCamera)
+</pre>
+
+<h2 id="Specification" name="Specification">Especificações</h2>
+
+<p>Not part of any specification; however, this API should be removed when the <a class="external" href="http://dev.w3.org/2011/webrtc/editor/getusermedia.html" rel="external" title="http://dev.w3.org/2011/webrtc/editor/getusermedia.html">WebRTC Capture and Stream API</a> has been implemented.</p>
+
+<h2 id="Leia_mais">Leia mais</h2>
+
+<ul>
+ <li>{{domxref("CameraControl")}}</li>
+</ul>
diff --git a/files/pt-br/web/api/cameracontrol/index.html b/files/pt-br/web/api/cameracontrol/index.html
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+---
+title: CameraControl
+slug: Web/API/CameraControl
+tags:
+  - API
+  - B2G
+  - DOM
+  - DOM Reference
+  - Firefox OS
+  - Graphics
+  - JavaScript
+  - NeedsTranslation
+  - Non-standard
+  - Reference
+  - TopicStub
+  - WebAPI
+  - camera
+translation_of: Archive/B2G_OS/API/CameraControl
+---
+<p>{{APIRef("Camera API")}}</p>
+
+<p>{{ non-standard_header() }}</p>
+
+<p>{{B2GOnlyHeader2('privileged')}}</p>
+
+<p><span class="seoSummary">When you use the {{domxref("CameraManager.getCamera()")}} method to get a reference to a camera, you specify a callback function to be invoked on success. That function receives as a parameter a <code>CameraControl</code> object. You can use its methods and properties to manage and make use of the camera.</span></p>
+
+<h2 id="Properties">Properties</h2>
+
+<dl>
+ <dt>{{domxref("CameraControl.capabilities")}} {{readonlyinline}}</dt>
+ <dd>A {{domxref("CameraCapabilities")}} object indicating all the capabilities for the given camera.</dd>
+ <dt>{{domxref("CameraControl.effect")}}</dt>
+ <dd>A string defining the effect to be used by the camera (<code>none</code> by default). Its value must be one of the values available in {{domxref("CameraCapabilities.effects")}}.</dd>
+ <dt>{{domxref("CameraControl.exposureCompensation")}} {{readonlyinline}}</dt>
+ <dd>A value used to compensate the camera exposure. This attribute is read-only; to change the exposure, you need to call the {{domxref("CameraControl.setExposureCompensation()")}} method.</dd>
+ <dt>{{domxref("CameraControl.flashMode")}}</dt>
+ <dd>A string that defines how the flash, if any, is to be used; this is <code>auto</code> by default if the device has a flash, <code>none</code> otherwise. When set, its value must be chosen from the list of options specified by  {{domxref("CameraCapabilities.flashModes")}}<code>.</code></dd>
+ <dt>{{domxref("CameraControl.focalLength")}} {{readonlyinline}}</dt>
+ <dd>A number that express the camera's focal length in millimeters.</dd>
+ <dt>{{domxref("CameraControl.focusAreas")}}</dt>
+ <dd>An <a href="/en-US/docs/JavaScript/Reference/Global_Objects/Array" title="/en-US/docs/JavaScript/Reference/Global_Objects/Array"><code>Array</code></a> of one or more objects that define where the camera will perform auto-focusing.</dd>
+ <dt>{{domxref("CameraControl.focusDistanceFar")}} {{readonlyinline}}</dt>
+ <dd>This value is a distance in meter used with {{domxref("CameraControl.focusDistanceNear")}} to defined the image's depth of field. The value for this property may be <code><a href="/en-US/docs/JavaScript/Reference/Global_Objects/Infinity" title="/en-US/docs/JavaScript/Reference/Global_Objects/Infinity">Infinity</a></code>.</dd>
+ <dt>{{domxref("CameraControl.focusDistanceNear")}} {{readonlyinline}}</dt>
+ <dd>This value is a distance in meter used with {{domxref("CameraControl.focusDistanceFar")}} to defined the image's depth of field.</dd>
+ <dt>{{domxref("CameraControl.focusDistanceOptimum")}} {{readonlyinline}}</dt>
+ <dd>This value is a distance in meter where the subject will appear sharpest.</dd>
+ <dt>{{domxref("CameraControl.focusMode")}}</dt>
+ <dd>A string that defines which kind of focus mode the camera should use (<code>auto</code> or <code>fixed</code> by default). Its value must be chosen from {{domxref("CameraCapabilities.focusModes")}}.</dd>
+ <dt>{{domxref("CameraControl.meteringAreas")}}</dt>
+ <dd>An <a href="/en-US/docs/JavaScript/Reference/Global_Objects/Array" title="/en-US/docs/JavaScript/Reference/Global_Objects/Array"><code>Array</code></a> of one or more objects that define where the camera will perform auto-focusing.</dd>
+ <dt>{{domxref("CameraControl.onShutter")}}</dt>
+ <dd>A handler for the camera's "shutter" event, to trigger a shutter sound and/or a visual shutter indicator.</dd>
+ <dt>{{domxref("CameraControl.onClosed")}}</dt>
+ <dd>A handler called when a new <code>CameraControl</code> object in the same app takes over the camera.</dd>
+ <dt>{{domxref("CameraControl.onRecorderStateChange")}}</dt>
+ <dd>A function to call when the recorder changes state, either because the recording process encountered an error, or because one of the recording limits (see {{domxref("CameraControl.startRecording()")}}) was reached.</dd>
+ <dt>{{domxref("CameraControl.sceneMode")}}</dt>
+ <dd>A string that defines which scene mode the camera is to use (<code>auto</code> by default). Its value must be chosen from {{domxref("CameraCapabilities.sceneModes")}}.</dd>
+ <dt>{{domxref("CameraControl.whiteBalanceMode")}}</dt>
+ <dd>A string that defines which white balance mode the camera is to use (<code>auto</code> by default). Its value must be chosen from {{domxref("CameraCapabilities.whiteBalanceModes")}}.</dd>
+ <dt>{{domxref("CameraControl.zoom")}}</dt>
+ <dd>A number that defines which kind of zoom factor mode the camera is to use (1 by default). Its value must be chosen from {{domxref("CameraCapabilities.zoomRatios")}}.</dd>
+</dl>
+
+<h2 id="Methods">Methods</h2>
+
+<dl>
+ <dt>{{ domxref("CameraControl.autoFocus()") }}</dt>
+ <dd>Tells the camera to attempt to focus the image.</dd>
+ <dt>{{ domxref("CameraControl.getPreviewStream()") }}</dt>
+ <dd>Gets a video stream from the camera; you can use this in an arbitrary context.</dd>
+ <dt>{{ domxref("CameraControl.getPreviewStreamVideoMode()") }}</dt>
+ <dd>Gets a video stream from the camera based on a specific video mode.</dd>
+ <dt>{{ domxref("CameraControl.release()") }}</dt>
+ <dd>Releases the camera so that other applications can use it.</dd>
+ <dt>{{ domxref("CameraControl.resumePreview()") }}</dt>
+ <dd>Resumes the preview video stream after it's been paused by a call to {{domxref("CameraControl.takePicture()")}}.</dd>
+ <dt>{{ domxref("CameraControl.setExposureCompensation()") }}</dt>
+ <dd>Lets you specify the exposure compensation factor.</dd>
+ <dt>{{ domxref("CameraControl.startRecording()") }}</dt>
+ <dd>Lets you start recording a video stream.</dd>
+ <dt>{{ domxref("CameraControl.stopRecording()") }}</dt>
+ <dd>Lets you stop recording a video stream.</dd>
+ <dt>{{ domxref("CameraControl.pauseRecording()") }}</dt>
+ <dd>Pauses the recording of a video stream.</dd>
+ <dt>{{ domxref("CameraControl.resumeRecording()") }}</dt>
+ <dd>Resumes the recording of a video stream that has previously been paused.</dd>
+ <dt>{{ domxref("CameraControl.takePicture()") }}</dt>
+ <dd>Lets you capture a single image, receiving it as a {{domxref("Blob")}}.</dd>
+</dl>
+
+<h2 id="Specification" name="Specification">Specification</h2>
+
+<p>{{page("/en-US/docs/Web/API/Navigator.MozCameras","Specification")}}</p>
+
+<h2 id="Permissions">Permissions</h2>
+
+<p>{{page("/en-US/docs/Web/API/Navigator.MozCameras","Permissions")}}</p>
+
+<h2 id="See_also">See also</h2>
+
+<ul>
+ <li>{{ domxref("CameraManager") }}</li>
+ <li>{{ domxref("CameraCapabilities") }}</li>
+ <li>{{ domxref("navigator.mozCamera") }}</li>
+</ul>