[reportlab-users] Transparent png

[Arkadi Colson]

Ah ok. It's that simple :-). Are you going to implement it in one of the 
next versions or what's the next step?

Thanks already for your effort!


On 24-05-17 11:19, Robin Becker wrote:
> OK it turns out to be LA which is kind of what I suspected.
>
>
>
>
> On 24/05/2017 09:22, Arkadi Colson wrote:
>> Hi
>>
>> I'm not really sure how to get the mode. I attached the image. 
>> Perhaps you can
>> give it a try?
>> Thanks a lot!
>>
> in python
>
> C:\code\hg-repos\reportlab\tmp>python
> Python 2.7.13 (v2.7.13:a06454b1afa1, Dec 17 2016, 20:53:40) [MSC 
> v.1500 64 bit (AMD64)] on win32
> Type "help", "copyright", "credits" or "license" for more information.
> >>> from PIL import Image
> >>> im=Image.open('gray-alpha.png')
> >>> im.mode
> 'LA'
> >>>
>
>
>
>> Arkadi
>>
>>
>> On 24-05-17 10:01, Robin Becker wrote:
>>>
>>> On 24/05/2017 08:17, Arkadi Colson wrote:
>>>> I tried it and the result is this:
>>>>
>>>> The black square should be a transparent image and looks like this:
>>>>
>>>> Both are png images.
>>>> The first one which is appearing correctly is "PNG image data, 48 x 
>>>> 48,
>>>> 8-bit/color RGBA, non-interlaced". The black square is "PNG image 
>>>> data, 48 x 48,
>>>> 8-bit gray+alpha, non-interlaced".
>>>>
>>>> Any idea why the "gray+alpha" isn't showing up correctly?
>>>>
>>>> Thx!
>>>>
>>>
>>> Hi Arkadi,
>>>
>>> I'm almost sure that we don't support lots of stuff regarding colour 
>>> mappings
>>> especially with images.
>>>
>>> Since PNG is not native for PDF I think we're just doing this for PNG
> .........
>>>>> that means.
>>>>>
>>
>
>