On Fri, 9 Apr 2004, David Wright wrote:
> Does the gimp support opacity layers? By opacity layer I mean an layer
> with a 8-bit numer for each pixel, where instead of being intrepreted as
> a gray or color intensity value, the number is intrepreted as a pure
> opacity. When it is 255, the pixel is black; when it is 0, the pixel
> below shows through perfectly; when it is intermediate, the pixel is an
> appropriate average of black and the color of the pixel below.
What you want to create is a layer with the alpha channel representing
your image and a solid color (black or white in your case).
1) Create a new white layer
2) Add layer mask (Black, full transparency)
3) select the layer with your text and in the image press ctrl-a and
ctrl-c to select all and copy the image.
4) Select the layer mask in the layers dialog and in the image press
ctrl-v to paste.
5) Anchor layer
6) The layer you just created is what you want. (you may like to right
click in the layer and "Apply layer mask")
I just confirmed these steps in my gimp 1.2.1 but I think there isn't any
difference in gimp 2.0.x.
PS. If you want to use this image in a web page notice that IE doesn't
support 8-bit transparent pngs. (there are some workarounds that you can
find in the archives of this list, but nobody should care about IE :P)
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