[Image-SIG] Transparent paste - another problem

[Szymon Kosok]

Hello,

You are my hero, Florian. :) That works! :) Thanks.

Best regards,
Szymon

2008/10/10 Florian Höch <lists+Image_SIG at hoech.org>:
> Ok, I think I got it. The alpha channel needs to be updated during and
> inserted after the paste operations.
>
> from PIL import Image, ImageChops
>
> foo = Image.open("bar.png")
> alpha = foo.split()[-1]
>
> for p in w:
>    baz = Image.open(p.element.binary.path)
>    foo.paste(baz, (p.x, p.y), baz)
>    alpha = ImageChops.add(alpha, baz.split()[-1])
>
> foo.putalpha(alpha)
>
> Regards,
>
> Florian
>
> Szymon Kosok schrieb:
>>
>> Hi,
>>
>> Ok. So here is some baz:
>>
>> http://i.wonderlife.pl/cache/ubranie-83-620.png
>> http://i.wonderlife.pl/cache/ubranie-84-620.png
>>
>> And this is foo:
>>
>> http://i.wonderlife.pl/img/ciala/mc.png
>>
>> Regards,
>> Szymon
>>
>> 2008/10/8 Florian Höch <lists+Image_SIG at hoech.org>:
>>>
>>> Hi,
>>>
>>> without seeing the original foo and at least some of the baz images, it's
>>> hard to tell how to achieve what you're looking for. I'd assume you want
>>> some sort of "adaptive multiplication", where only transparent parts are
>>> "multiplied over" the existing image and fully opaque parts "knock out"
>>> everything under it.
>>>
>>> Regards,
>>>
>>> Florian
>>>
>>> Szymon Kosok schrieb:
>>>>
>>>> Hi,
>>>>
>>>> I have another problem with PIL and transparent images. I have such
>>>> code:
>>>>
>>>>       foo = Image.open("bar.png")
>>>>
>>>>       for p in w:
>>>>
>>>>           baz = Image.open(p.element.binary.path)
>>>>
>>>>           foo.paste(baz, (p.x, p.y), baz)
>>>>
>>>> And the problem is... every baz (some of them are semi-transparent) is
>>>> transparent over every previous element.
>>>>
>>>> Maybe I'll show what I want, and what I got:
>>>>
>>>> http://i36.tinypic.com/2efjlaw.png - this is what I want,
>>>> http://i38.tinypic.com/11glf6t.png - and this what I get.
>>>>
>>>> Any hints?
>>>>
>>>> Best regards,
>>>> Szymon
>>>> _______________________________________________
>>>> Image-SIG maillist  -  Image-SIG at python.org
>>>> http://mail.python.org/mailman/listinfo/image-sig
>>>
>>> _______________________________________________
>>> Image-SIG maillist  -  Image-SIG at python.org
>>> http://mail.python.org/mailman/listinfo/image-sig
>>>
>
> _______________________________________________
> Image-SIG maillist  -  Image-SIG at python.org
> http://mail.python.org/mailman/listinfo/image-sig
>