Type Convert Error when work with canvas

[shaqtsui]

Seems the GeneratedWrapper can not work with canvas, it will cause type convertion error.

Env:
FireForx/Chrome + Polymer + Plupload

Code Example:
var ctx = canvas.getContext('2d');
var tmpCanvas = document.createElement('canvas');
ctx.drawImage(tmpCanvas, 0, 0, 1024, 1024, 0, 0, 251, 251);

Error Log:
Argument 1 of CanvasRenderingContext2D.drawImage could not be converted to any of: HTMLImageElement, HTMLCanvasElement, HTMLVideoElement.

[sorvell]

+@arv

[sjmiles]

Try this:

var tmpCanvas = document.createElement('canvas');
var nativeCanvas = unwrap(tmpCanvas);
ctx.drawImage(nativeCanvas, 0, 0, 1024, 1024, 0, 0, 251, 251);

[arv]

Someone needs to manually forward these. The canvas context API is pretty
large. Patches welcome.

On Mon, Sep 23, 2013 at 10:02 PM, Scott J. Miles
notifications@github.comwrote:

Try this:

var tmpCanvas = document.createElement('canvas');var nativeCanvas = unwrap(tmpCanvas);ctx.drawImage(nativeCanvas, 0, 0, 1024, 1024, 0, 0, 251, 251);

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Reply to this email directly or view it on GitHubhttps://github.com//issues/288#issuecomment-24974906
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erik

[dfreedm]

This looks supported as of googlearchive/ShadowDOM@80b8152