[magick-users] making a semi-transparent image more transparent

[Korny Sietsma]

Sorry, meant to send this to the rmagick list not the magick-users list :)

- Korny

On Wed, Jun 11, 2008 at 2:02 PM, Korny Sietsma <korny at sietsma.com> wrote:
> Hi,
> I'm trying to make an image that has a solid area, and a semi-opaque
> area, and a transparent area, somewhat more transparent.
>
> (The particular example is a rounded rectangle, which is solid, with a
> shadow behind it created with the "shadow()" function)
>
> How do I make the whole image 75% of the original opacity, so the
> rounded rectangle is transparent, but without messing up the
> completely transparent parts of the image?
>
> I tried setting "image.opacity = Magick::MaxRGB * 0.75" - however this
> seems to set all the transparent parts of the image to 75% opacity as
> well.
>
> I'm sure I could work out a way to do this by composing the image over
> another one - but that seems overly complex.  Surely there's a simple
> way to do this?
>
> - Korny
> --
> Kornelis Sietsma korny at my surname dot com
>



-- 
Kornelis Sietsma korny at my surname dot com
kornys at gmail dot com on google chat -- kornys on skype
"we do what we must, because we can"