OffscreenCanvas.transferToImageBitmap()

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这是一个实验中的功能
此功能某些浏览器尚在开发中,请参考浏览器兼容性表格以得到在不同浏览器中适合使用的前缀。由于该功能对应的标准文档可能被重新修订,所以在未来版本的浏览器中该功能的语法和行为可能随之改变。

OffscreenCanvas.transferToImageBitmap() 方法使用offscreenCanvas最近渲染得到的图片创建一个ImageBitmap 对象.

语法

ImageBitmap OffscreenCanvas.transferToImageBitmap()

返回值

一个ImageBitmap对象.

例子

var offscreen = new OffscreenCanvas(256, 256);
var gl = offscreen.getContext("webgl");

//一些绘制要使用gl前后文

offscreen.transferToImageBitmap();
// ImageBitmap { width: 256, height: 256 }

Specifications

Specification Status Comment
HTML Living Standard
OffscreenCanvas.transferToImageBitmap()
Living Standard

浏览器兼容

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
transferToImageBitmap
Experimental
Chrome Full support 69Edge Full support ≤79Firefox Partial support 46
Notes Disabled
Partial support 46
Notes Disabled
Notes See bug 1390089.
Disabled From version 46: this feature is behind the gfx.offscreencanvas.enabled preference. To change preferences in Firefox, visit about:config.
IE No support NoOpera Full support 56Safari No support NoWebView Android No support NoChrome Android Full support 69Firefox Android Partial support 46
Notes Disabled
Partial support 46
Notes Disabled
Notes See bug 1390089.
Disabled From version 46: this feature is behind the gfx.offscreencanvas.enabled preference. To change preferences in Firefox, visit about:config.
Opera Android Full support 48Safari iOS No support NoSamsung Internet Android Full support 10.0

Legend

Full support  
Full support
Partial support  
Partial support
No support  
No support
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.
See implementation notes.
See implementation notes.
User must explicitly enable this feature.
User must explicitly enable this feature.

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