[html5] HTML5 canvas.toDataURL suggestions
ian at hixie.ch
Tue Aug 20 16:33:50 PDT 2013
On Sat, 18 May 2013, Sigurd Lerstad wrote:
> I suggest improving / making more flexible the canvas.toDataURL API
> The API is currently called with a second quality argument for the JPEG
> and WebP formats, and no second argument for the PNG format:
> toDataURL(type, quality); // JPEG and WebP
> toDataURL(type); // PNG
> I suggest the following possibilities as well:
> grayscale: true/false, // since the JPEG format also
> supports grayscale images at smaller files sizes
What's the use case?
> progressive: true/false
What's the use case for controlling this?
To be perfectly honest, I don't really understand why we'd want to expose
as a lossy format at all. It seems better to get the whole data to the
server, and then let the server do whatever it needs to do (convert to
JPEG, etc) for long-term use of the data.
> interlaced: true/false,
> grayscale: true/false,
> alpha: true/false,
> Some means of creating 8bit color indexed PNG would also be nice.
Nice for what? I don't really understand the use cases here.
Ian Hickson U+1047E )\._.,--....,'``. fL
http://ln.hixie.ch/ U+263A /, _.. \ _\ ;`._ ,.
Things that are impossible just take longer. `._.-(,_..'--(,_..'`-.;.'
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