Re: [GD-DEVEL] trasparent image width antialiasing

Hi,

On 1/30/07, yagyog <[email protected]> wrote:
> ----- Original Message -----
> From: "Pierre" <[email protected]>
> To: "yagyog" <[email protected]>
> Cc: <[email protected]>
> Sent: Tuesday, January 30, 2007 3:48 PM
> Subject: Re: [GD-DEVEL] trasparent image width antialiasing
>
>
> > On 1/30/07, yagyog <[email protected]> wrote:
> >> I have a problem, Excused but I do not speak English
> >>
> >>
> >> I have in input one image png with antialising
> >> with uniform solid background
> >>
> >> I would want
> >>
> >> 1) to eliminate the background
> >> 2) recreate the channel alpha in order not to lose the antialising on the
> >> text
> >>
> >> It is possible?
> >> you can give me of the information ?
> >>
> >> I try this code but not work:
> >>
> >> //
> >> //load a, load b  and create test
> >> //
> >> a = myLoadPng("a.png");
> >> b = myLoadPng("b.png");
> >
> > Can you give us a link to the images a.png and b.png please?
> >
> > --Pierre
> >
> Yes
> the color is changed but ,
> it does not change nothing
>
> http://www.yag.altervista.org/varius/a.png
> http://www.yag.altervista.org/varius/b.png
> my result
> http://www.yag.altervista.org/varius/test.png

You have to use the alpha component in your image. So the blending
will be done when you copy a or b over test. But if the original
images do not contain any alpha components, the anti aliasing being
done against a given color (green and yellow in your case), you will
have a visible aliasing.

--Pierre