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
The compatibility table on 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.
Update compatibility data on GitHub
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
ImageBitmapRenderingContext | Chrome Full support 66 | Edge ? | Firefox Full support 46 | IE No support No | Opera Full support Yes | Safari No support No | WebView Android Full support 66 | Chrome Android Full support 66 | Firefox Android Full support 46 | Opera Android Full support Yes | Safari iOS ? | Samsung Internet Android No support No |
transferFromImageBitmap | Chrome Full support 66 | Edge ? | Firefox
Full support
52
| IE No support No | Opera Full support Yes | Safari No support No | WebView Android Full support 66 | Chrome Android Full support 66 | Firefox Android
Full support
52
| Opera Android Full support Yes | Safari iOS ? | Samsung Internet Android No support No |
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.
- Non-standard. Expect poor cross-browser support.
- Non-standard. Expect poor cross-browser support.
- Uses a non-standard name.
- Uses a non-standard name.