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Non-standard
This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.
The non-standard and internal only CanvasRenderingContext2D.drawWidgetAsOnScreen() method of the Canvas 2D API renders the root widget of a window into the canvas. Unlike drawWindow(), this API uses the operating system to snapshot the widget on-screen, rather than reading from Gecko's own compositor.
This API cannot be used by Web content. It is only supported on Windows, only on widgets that use OMTC, and only from within the chrome process.
Syntax
void ctx.drawWidgetAsOnScreen(window);
Parameters
window- The
Windowto render.
Specifications
Not part of any current specification or draft. This is a non-standard and internal only API.
Browser compatibility
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|
| Basic support | Not supported | 41 (41) | Not supported | Not supported | Not supported |
| Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|
| Basic support | Not supported | Not supported | 41.0 (41) | Not supported | Not supported | Not supported |
See also
- The interface defining it,
CanvasRenderingContext2D. CanvasRenderingContext2D.drawWindow()