You've got my vote for it, especially if it's a step toward html5 and svg
support.
"Carlos López González" <[email protected]> wrote:
>I think that when Synfig finds a layer that uses any old blending
>method it
>would simply call the current code. Since compositing in Synfig is made
>layer by layer it won't affect the new blending behavior. Once the
>layer is
>blended using the old method is turns into a new backdrop for the above
>layer(s) and then the new blending methods can be used.
>
>For the UI the old blending methods are never offered as possible
>parameter
>selection (drop down box) and when the layer is using an old method is
>it
>displayed like that on the GUI but user cannot choose to select any old
>one. Alternatively when a old blend method is used and there is a new
>blend
>method that fits with it, Synfig Studio could automatically (or
>manually)
>change the old blend to the corresponding new blend method.
>
> I think this is specially important to allow Cairo, HTML5 and OpenGL
>integration. And also for SVG export ability which is very important
>too.
>
>Thanks for the reply David ;)
>Cheers
>
>2012/11/13 David Rylander <[email protected]>
>
>> Agreed. It seems easier and less error proned. And also more
>consistent
>> with other applications.
>> How would backward compability work?
>>
>> -David
>>
>> 2012-11-13 07:58, Carlos López González skrev:
>>
>> I think that this material is important to read:
>> http://www.w3.org/TR/compositing/
>>
>> I wonder if it wouldn't be good to rethink the current Synfig
>blending
>> methods and modify them to stick strictly to the W3C standards. It
>would
>> allow to use external libraries without the issues I'm having with
>Cairo
>> operators.
>>
>> Of course the old blend methods should still working inside Synfig
>but we
>> shouldn't continue using the non standard blending methods.
>>
>> Also it might be interesting to separate the blending parameters in
>two.
>> First in what is called in the document "The Porter Duff compositing
>> operators" (that defines how the alpha are combined) and the
>"Blending"
>> that is the pure color combinations. I need to read the document
>completely
>> to profile this properly.
>>
>> quote:
>> Porter Duff compositing takes into account the overall shape of the
>> graphic element and its opacity, as well as the opacity and shape of
>the
>> backdrop, and determines where the backdrop is visible, where the
>graphic
>> element is visible and where one is visible through the other. The
>blending
>> step determines how the colors from the graphic element and the
>backdrop
>> interact.
>>
>> Any thoughts?
>>
>> --
>> Carlos
>> http://synfig.org
>>
>>
>>
>>
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>
>
>--
>Carlos
>http://synfig.org
>
>
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