[html5] a question about canvas element's shadow effect

Ian Hickson ian at hixie.ch
Wed Jun 10 00:05:08 PDT 2009

On Wed, 20 May 2009, caoyipeng wrote:
> canvas element's shadow effect use Gaussian blur to fulfill.
> In Gaussian blur, when do convolution operation, Gaussian template's size(or
> Gaussian kernel width and height) affect the blur effect
> ,is there default value about Gaussian template's size(such as the size is
> (6ó+1)*(6ó+1),ó is the standard deviation).

The bigger the better. This is just a quality of implementation issue.

Ian Hickson               U+1047E                )\._.,--....,'``.    fL
http://ln.hixie.ch/       U+263A                /,   _.. \   _\  ;`._ ,.
Things that are impossible just take longer.   `._.-(,_..'--(,_..'`-.;.'

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