[mapguide-users] Re: Partial transparent selection color of the Ajax viewer

[Julien Leture]

Gabriele Monfardini wrote:
> 
> Apparently, with PNG8 format, selection color do not have alpha value.
> 

Hi, 

I made some tests, crossing PNG, PNG8, GD and AGG render.
Here's my results :

PNG8 & AGG : no transparent at all
PNG & AGG : transparent, but alpha value is ignored
PNG8 & GD : transparent, but alpha value is ignored
PNG & GD : transparent, but alpha value is ignored

So, like the wiki said, the alpha value does not have any impact on the
transparency. It's mean that 0x0000FFFF, 0x0000FF00 or 0x0000FF80 will
generate the same selection overlay.

Does somebody success to generate a transparent selection with a custom alpa
value? I find that the default transparency is too opaque.

-----
Julien Leture
.net developper
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