android - Save Canvas to Device in Phonegap -

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i've done lot of research , testing on this, getting compatibility/clarity issues right , left. hoping had clear solution this.

my phonegap build (3.1) application pulls images s3, adds overlay text them via html canvas, , needs saved user's phone on click action.

here relevant details:

  • preferably saved location detectable gallery (android) or photos app (ios).
  • i need work in android 2.3 , ios 6-7.
  • i have composited version of image overlay text located on aws. happy downloading image device either composited image's url or canvas directly.

here of barriers:

  • i keep getting "tainted canvas" security errors when trying "canvas.todataurl()", though set wildcard on s3's cors permissions used bucket.
  • the "download" attribute seems unsupported in mobile browsers.
  • i happy use phonegap's "filetransfer.download()" method, haven't been able figure out adequately acquire right file path on each device use in gallery/photos app

is there effective way done cross-platform?

as hate answer own question, found phonegap plugin called "canvas2image" perfect this: https://github.com/devgeeks/canvas2imageplugin

the description of pretty ambiguous in phonegap plugins directory, pretty saves image appropriate directory. takes success callback, error callback, , canvas element arguments. works in both ios , android, on unclear due phonegap plugins directory description.

window.canvas2imageplugin.saveimagedatatolibrary(     function(msg){         ext.msg.alert('success!', 'the image saved photos gallery on device.');     },     function(err){         ext.msg.alert('aww, schucks!', 'there problem saving image device.');     },     document.queryselector('canvas') );

note: wouldn't recommend using document.queryselector in sencha touch... it's clear reference.

speculative note: didn't further, appears may not great option if need subsequently link or open saved image.


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