Yet another bug. This time filters vs selections

[Dmitry Kazakov]

>
>
> On Sunday 13 September 2009, Dmitry Kazakov wrote:
>> > Btw, Blur filter doen NOT pay any attention to selections. And i do not
>> > know the way how can it do that. =(
>> it's probably just a matter to give the iterrators the selection object.
>>
>
> It won't solve the problem of semi-selected pixels (pixels with alpha~128).
> Such pixels should be filtered with cs->applyAlphaU8Mask() separately. I
> think it'll be quite complex solution for blur filter.
>
>
> Atm, i insist on using bitBlt after the filtering. This will make filter
> creation much simplier, especially for filters that are quite complex
> themselves (like convolution). My tests show the following overhead:
>
> when 28% of the canvas is deselected we get only 2% overhead
> when 53% of the canvas is deselected we get only 13% overhead
>

when 73% of the canvas is deselected we get only 19% overhead

-- 
Dmitry Kazakov
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