[whatwg] A question about the drawimage() canvas function

Glenn Maynard glenn at zewt.org
Fri Mar 1 17:41:25 PST 2013

On Fri, Mar 1, 2013 at 4:45 PM, Rik Cabanier <cabanier at gmail.com> wrote:

> Sorry about being unclear. Yes, I meant in addition of.
> So:
> - add your suggested step 1
> - change HTMLImageElement from original step 2 to CanvasImageSource

"image" is always a CanvasImageSource, so if this is what was intended it
would just omit the type check entirely.

But why does it throw this exception in the first place?  It's a weird
special case.  Blitting a zero-size image should do nothing, just like
drawImage(src, 0, 0, 0, 0).

Glenn Maynard

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