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diff --git a/files/zh-cn/web/api/cameracontrol/index.html b/files/zh-cn/web/api/cameracontrol/index.html new file mode 100644 index 0000000000..3be97dac90 --- /dev/null +++ b/files/zh-cn/web/api/cameracontrol/index.html @@ -0,0 +1,88 @@ +--- +title: CameraControl +slug: Web/API/CameraControl +translation_of: Archive/B2G_OS/API/CameraControl +--- +<p>{{APIRef("Camera API")}}</p> + +<p>{{ non-standard_header() }}</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.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> |