Take snapshot on iOS devices does not work

[MatBdry]

I have an issue when I try to take a snapshot of a drawing on my iPhone.

http://jsfiddle.net/qp8x7a5w/36/

As you can see, I set the option enableRetinaScaling to false. When the snapshot is taken, it seems to be smaller than the original... I don't know why.

And if I try to take a snapshot with the option enableRetinaScaling set to true, it does not work, and I have the message Canvas area exceeds the maximum limit (width * height > 16777216) (may be because I set a multiplier to 4, and it's too much for the device).

So, I have a problem because I need a snapshot 4 times bigger than the original, but with or without the enableRetinaScaling option, there is an issue.

Do you have any idea ?

Thank you for your help !

[asturur]

the message is clear, in that device you have some limit of canvas size. you cannot have a canvas that is bigger than 4k x 4k
i should check, maybe the canvas created for export is automatically rendered in retina enabled.

[asturur]

duplicate of #3152