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[whatwg] Feature proposal - add method to CanvasRenderingContext2D

From: František Řezáč <frantisek.rezac@calavera.info>
Date: Wed, 3 Mar 2010 16:44:26 +0100
Message-ID: <17fcfe911003030744g20f68311u5c506b9f1e84408b@mail.gmail.com>
Yes, it works. I failed to spot that it's possible to put data url to
Image.src, sorry.

On Wed, Mar 3, 2010 at 3:33 PM, Philip Taylor <excors+whatwg at gmail.com> wrote:
> On Wed, Mar 3, 2010 at 1:08 PM, Franti?ek ?ez??
> <frantisek.rezac at calavera.info> wrote:
>> Description
>> add overload of (or add similarly called) method "createImageData" to
>> interface CanvasRenderingContext2D which would take two arguments:
>> - encodedImageBinaryData
>> - dataMimeType
>> which are rather self explanatory.
>>
>> Reason
>> The reason is to be able to supply output of the future File API
>> standard (http://www.w3.org/TR/FileAPI/) into canvas.
>
> The canvas API already lets you do:
>
> ?var img = new Image();
> ?img.onload = function() {
> ? ?ctx.drawImage(img, 0, 0);
> ? ?// do processing on the canvas
> ?};
> ?img.src = 'data:image/png;base64,...'; // get this string from
> readAsDataURL etc
>
> Is that sufficient for your use case?
>
> --
> Philip Taylor
> excors at gmail.com
>



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Franti?ek ?ez??
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Received on Wednesday, 3 March 2010 07:44:26 UTC

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