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(I send this days ago, and was told it was subject to moderation
because of a suspicious header). I found the problem, thanks to the code you posted. My destination image was "RGBA", and I was viewing it in a web browser. Most of the image had an opaque alpha channel, but where I had drawn the drop shadows, it had the shadow's alpha values, so the white of the browser was showing through. This isn't the most intuitive way for alpha drawing to work. I guess I could see it both ways: if the destination is opaque, it should stay opaque, or drawing pixels onto a destination takes all the values from the source. In any case, changing my destination image from RGBA to RGB solved the problem. Thanks. --Ned. Fredrik Lundh wrote:
-- Ned Batchelder, http://nedbatchelder.com |
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