pass arguments to getSignatureImage along to toDataURL

[jokeyrhyme]

After every update, I change the declaration of getSignatureImage like so:

,getSignatureImage: function() { return element.toDataURL.apply(element, arguments) }

This means I use getSignatureImage('image/jpeg') if I want JPEGs instead of everything being PNGs. This is still broken on certain Androids, but no more broken than it was before (I think).

It would be terrific if you incorporated this in the next update, as it is completely backwards-compatible.

[thomasjbradley]

That works for me. I'll add it into the next update.

[clubnet]

api.getSignatureImage('image/jpeg')

Is returning png format

[thomasjbradley]

That should work. What browser are you using? Does it support JPGs from ?

[clubnet]

I am using it on an android platform 4.0.4 with phonegap, everything else seems to work, I just need to have the file as jpeg so I can add it to pdf .

[thomasjbradley]

Does Phonegap have an updated enough version of Webkit? I'm not fully sure how PhoneGap works, but I was under the impression that it had its own version of Webkit.

[clubnet]

It uses the devices native webview kit in this case android.webkit.WebView

[thomasjbradley]

Does your code work outside PhoneGap in the Android native browser?

[clubnet]

it is a problem with android versions 4+ converting to jpeg, for those interested this is how you get around it

var imagepath = document.getElementById("signaturecanvas");
var encoder = new JPEGEncoder();
var imgData = encoder.encode(imagepath.getContext("2d").getImageData(0, 0, 589, 220), 100);
var jpegBase64Data = imgData.split(',')[1];
var jpegBinary = atob(jpegBase64Data);

However since upgrading to 4.1.2 the signature canvas seems to only draw straight lines and misses much of the input

[clubnet]

Any update on this, basically it is now unusable with an android device with the latest 4.1.2 os installed. Tested your demos with the native browser and got the same result

[thomasjbradley]

@clubnet So, it's unusable because you can't get JPEGs? Will PNGs not do?