- From: Ian Hickson <ian@hixie.ch>
- Date: Fri, 13 Jun 2008 08:59:41 +0000 (UTC)
- To: Anne van Kesteren <annevk@opera.com>
- Cc: HTML WG <public-html@w3.org>
On Thu, 5 Jun 2008, Anne van Kesteren wrote: > > At Opera we're planning on adding support to <canvas> for JPEG as export > format. To make the file size reasonable there needs to be a way to set > the quality level of the JPEG. Wikipedia has a nice example of why that > matters: > > http://en.wikipedia.org/wiki/JPEG#Sample_photographs > > One simple solution to this which is reasonably consistent with the rest > of the <canvas> API is to add a jpegQuality DOM attribute to the > <canvas> element which takes an integer in the range 0-1 (similar to > globalAlpha). The default value could maybe be 0.75 as that usually > gives reasonable looking images with a much smaller size than 1.0. > > This attribute only affects toDataURL() and only when the first argument > is not omitted and case-insensitively matches "image/jpeg". Added a way to pass the JPEG quality to toDateURL(). -- Ian Hickson U+1047E )\._.,--....,'``. fL http://ln.hixie.ch/ U+263A /, _.. \ _\ ;`._ ,. Things that are impossible just take longer. `._.-(,_..'--(,_..'`-.;.'
Received on Friday, 13 June 2008 09:00:25 UTC