Tuesday, January 29, 2013

Re: GWT Canvas resize ImageData and get Canvas.toDataUrl

By the way, I don't want to paint the resized image to the UI.
Only get the resized data to thranfer to the server.

Am Mittwoch, 30. Januar 2013 07:50:44 UTC+1 schrieb Musicman75:

for 2 days now I'm trying to resize my Canas data to get a smaller value when calling Canvas.toDataUrl.

The szenario:

User draws to a Canvas (Sign something). The drawing Canvas is sized to the Window size.
Before transgering the data to the server I want to scale the Canvas to fit to a smaller size.

I think this is very simple, but at the moment I'm bainfucked :-).

The steps:

- Get Canvas data
- Resize/Scale Canvas data
- Get data by calling Canvas.toDataUrl
- Transfer to server as image/png;base64..... String

Thanks a lot for any answer.


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