XRWebGLLayerInit.framebufferScaleFactor

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规范
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安全上下文
此特征只可用于安全上下文 (HTTPS)，在某些或所有支持浏览器 .

XRWebGLLayerInit dictionary's framebufferScaleFactor property, when specified upon instantiating a new XRWebGLLayer using its constructor, XRWebGLLayer() , specifies the scaling factor to use when determining the size of the frame buffer to use when rendering the scene, relative to the default XR device display resolution.

For example, a value of 1.0 indicates that the frame buffer should be the same resolution as the actual display, while a value of 0.5 indicates that the frame buffer should be half the resolution of the display. A value of 2.0, on the other hand, creates a frame buffer whose resolution is double that of the actual display buffer.

There are valid use cases for all of these kinds of scaling. See Managing rendering quality in WebXR performance guide 了解更多信息。

You can determine the scaling factor that you would need to apply to match the default frame buffer resolution by using the XRWebGLLayer.getNativeFramebufferScaleFactor() static function.

句法

let layerInit = {
  framebufferScaleFactor: scaleFactor
};
let glLayer = new XRWebGLLayer(xrSession, gl, layerInit);
let glLayer = new XRWebGLLayer(xrSession, gl, { framebufferScaleFactor: scaleFactor });

值

A floating-point value indicating a multiplier to apply to the default frame buffer resolution in order to determine the resolution of the frame buffer for the XRWebGLLayer .

范例

In this example, a new XRWebGLLayer is created for a WebXR session, xrSession , with a frame buffer whose resolution is half that of the default display resolution of the XR device.

xrSession.updateRenderState({
  baseLayer: new XRWebGLLayer(xrSession, gl, {
     framebufferScaleFactor: 0.5
  });
});

规范

规范	状态	注释
WebXR 设备 API The definition of 'XRWebGLLayerInit.framebufferScaleFactor' in that specification.	工作草案	初始定义。

浏览器兼容性

The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`framebufferScaleFactor`	Chrome 79	Edge 79	Firefox No	IE No	Opera No	Safari No	WebView Android 79	Chrome Android 79	Firefox Android No	Opera Android No	Safari iOS No	Samsung Internet Android 11.2

图例

完整支持
不支持

另请参阅

元数据

最后修改： Dec 17, 2019

WebXR 设备 API
XRWebGLLayerInit
特性
1. alpha
2. antialias
3. depth
4. framebufferScaleFactor
5. ignoreDepthValues
6. stencil
Related pages for WebXR Device API

在此页

句法

值

范例

规范

浏览器兼容性

图例

另请参阅

相关话题