Re: [CSS Images] syntax for color interpolation hint

On Fri, Oct 3, 2014 at 12:22 PM, Rik Cabanier <cabanier@gmail.com> wrote:

> On Thu, Oct 2, 2014 at 9:06 PM, Robert O'Callahan <robert@ocallahan.org>
> wrote:
>
>> I'm unconvinced this syntax is a good idea. Using a fake color stop for
>> this purpose just seems like a hack.
>>
>
> Why is this a hack? It matches how authoring tools present midpoints in
> their UI's: they are shown as color stops with no color
>

Do you mean "some Adobe authoring tool" or a broad range of authoring tools?


>
>> If someone accidentally leaves out a color from a color stop they will
>> trigger this feature accidentally. It also means there are edge cases we
>> have to check for and reject in the parser, e.g. consecutive fake color
>> stops. It's also not particularly extensible; we're consuming this part of
>> the syntax (color-less stop) for a particular feature that isn't directly
>> related to that syntax.
>>
>
> Why do you think it's not extensible? If we want to support more midpoints
> later, we can certainly add support for that by being more permissive
>

Adding alternative interpolation functions, for example.


>
>
>> For an obscure feature like this, can't we afford to be more explicit.
>> e.g. attach an interpolation() function to the color-stop before the
>> interval we want to change the interpolation of?
>>
>
> That is very confusing because the midpoint applies to the curve of both
> color stops.
>

OK, then explicit interpolation() values between stops.

Rob
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