Carsten wrote:
> On Sat, 26 Apr 2008 00:42:47 -0400 Jose Gonzalez <[EMAIL PROTECTED]> babbled:
>
>
>> Gustavo wrote:
>>
>>
>>> On Thu, Apr 24, 2008 at 3:54 PM, Jose Gonzalez <[EMAIL PROTECTED]> wrote:
>>>
>>>
>>>> Ok, let me give you some 'criticisms' I have of parts of the
>>>> approaches to this filters stuff that both Carsten and Gustavo
>>>> suggested, and let me start with:
>>>>
>>>> I just don't see a realistic "need" for having a built-in
>>>> mechanism of arbitrary lists of arbitrary filters to be applied
>>>> to any evas obj (or the rendering of such an obj), or as a canvas
>>>> modifier object itself.
>>>>
>>>> I wish someone would point out an interesting, and/or common,
>>>> real-time gui use of something besides: one specialty filter (say a
>>>> blur or a bumpmap) followed by a geometric transform (and possibly
>>>> all clipped by a mask).
>>>>
>>>>
>>> in order to do cover flow-like we need:
>>> 1 - projection;
>>> 2 - mirror;
>>> 3 - blur the mirror;
>>>
>>>
>>>
>> That's one way, though in fact projection and mirror are
>> expressible as one transform. The simplest way to do this is to
>> perform the required transform and mask with a suitable gardient-
>> like image (could also be defined as a single especialty filter).
>> Would you like me to send you some simple software-based
>> examples of how you can do this?
>>
>
> yes projection and mirror can be merged, but blur is still a separate
> filter...
> so point still stands that u need to have filter pipelines. the ability to
> know
> what parts of the screen have what filter chain applied to what source object
> data
>
>
No you don't *need* to, not for this case - not if you have separate
transforms/masks and a 'filter set' mechanism. It would reduce to what I
stated: One specialty filter followed by a transform (with an optional mask
which itself can be filtered, transformed - not masked). Though mind you,
going thru a blur just to get a reflection-like effect is really overkill,
just do a reflection with a 'fade' alpha mask.. you have some demos man.
If you really must have a serial pipeline of filters, then just do
the "filter a filter" bit and you can have that.. feel free to implement away,
unless Gustavo beats you to it. I'll hold off on the transforms and masks.
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