ImageBitmapRenderingContext

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。

ImageBitmapRenderingContext 接口是 canvas 的渲染上下文，它只提供了使用给定 ImageBitmap 替换 canvas 的功能。它的上下文 ID (HTMLCanvasElement.getContext() 或 OffscreenCanvas.getContext() 的第一个参数)  是 "bitmaprenderer"。

这个接口可用于 window context 和 worker context.

方法

ImageBitmapRenderingContext.transferFromImageBitmap()

在与此渲染上下文相关的 canvas 中显示给定的 ImageBitmap 。 ImageBitmap 的所有权被转移到画布上。 这个函数以前命名为transferImageBitmap()，但在规范中修改了原名字。 为了避免影响之前的代码，旧名称作为别名被保留下来。

规范

Currently drafted as a proposal in the OffscreenCanvas specification.

浏览器兼容性

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
ImageBitmapRenderingContext
Experimental
Chrome Full support 66Edge Full support ≤79Firefox Full support 46IE No support NoOpera Full support YesSafari No support NoWebView Android Full support 66Chrome Android Full support 66Firefox Android Full support 46Opera Android Full support YesSafari iOS ? Samsung Internet Android Full support 9.0
transferFromImageBitmap
Experimental
Chrome Full support 66Edge Full support ≤79Firefox Full support 52
Full support 52
No support 46 — 52
Alternate Name
Alternate Name Uses the non-standard name: transferImageBitmap
IE No support NoOpera Full support YesSafari No support NoWebView Android Full support 66Chrome Android Full support 66Firefox Android Full support 52
Full support 52
No support 46 — 52
Alternate Name
Alternate Name Uses the non-standard name: transferImageBitmap
Opera Android Full support YesSafari iOS ? Samsung Internet Android Full support 9.0

Legend

Full support  
Full support
No support  
No support
Compatibility unknown  
Compatibility unknown
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.
Uses a non-standard name.
Uses a non-standard name.

相关链接