On Oct 31, 2008, at 8:58 AM, Annick Fron wrote:
> Hi,
>
> I have made an image using SVG, and I would like to generate the
> associated mask to see the background when I move the image.
> I can generate a white and black image from the same file which
> reflects exactly the same shape.
> I tried to use for the mask
> Image>>convertToCoverageWithOpaquePixel: (2 raisedTo: 24)
>
>
> and OpaqueImage figure:shape:
> but it does not work.
Annick, can you clarify some of these points for me?
You made an image using SVG. What does that mean? Does that mean you
created a VisualWorks Image object (i.e. Depth32Image) somehow from
SVG? Nominally, an SVG derived image would require an alpha channel,
does your image have that? Or did you flatten that out somehow?
To make the convert work correctly, I would do it like:
anImage convertToCoverageWithTransparentPixel: (anImage pallete
indexOfPaintNearest: ColorValue white)
or something like that
If, as I say, it's at all interesting as an SVG, you're going to find
that the lack of alpha is going to give you chunky edges.
--
Travis Griggs
Objologist
"It had better be a pretty good meeting, to be better than no meeting
at all" - Boyd K Packer
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