Dear list,
because of the problems that Internet Explorer has with RGBA PNGs I'm
trying to convert a set of images to GIFs but hitting problems as usual.
for file in files:
file = file.split(".")
if file[1] == "png":
im = Image.open(".".join(file))
new = im.convert("RGB")
new = new.convert("P", palette=Image.ADAPTIVE, colors=256)
mapping = [255] * 256
mapping[0] = 0
mask = ""
mask = new.point(mapping, "1")
new.paste(im, None, mask)
new.thumbnail((32, 32), Image.ANTIALIAS)
new.save(".".join((file[0], "gif")), "GIF")
This works for some but not all images. I know my problem is that I don't
really understand how to convert the alpha values correctly to palette
ones. Is the following correct - I can work out from my alpha band which
pixels should be transparent, and set their value to 0?
Charlie
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