[scribus-dev] lcms 2.8 and transparency flattening

[Leonard Rosenthol]

I should add that if you have any questions about it, I am happy to help.

Leonard

On 6/9/16, 8:42 AM, ""Christoph Schäfer"" <christoph-schaefer at gmx.de> wrote:

>Hi Leonard,
>
>Thanks for your reply. Always appreciated!
>
>I'm admittedly a layman here, but the reason I posted this was that one of the main problems with transparency flattening was colour management. How can we preserve and mix different colour models with transparency involved, even if we'd choose the "easy way"?
>
>The issue may become moot once the whole world has adapted PDF/X-4, but it'll take a long time until then.
>
>Christoph
>
>> Gesendet: Mittwoch, 08. Juni 2016 um 09:16 Uhr
>> Von: "Leonard Rosenthol" <lrosenth at adobe.com>
>> An: "Scribus Development Mailing List" <scribus-dev at lists.scribus.net>, "Private Scribus Development List" <scribus-team at lists.scribus.net>
>> Betreff: Re: [scribus-dev] lcms 2.8 and transparency flattening
>>
>> Lcms cant help with transparency flattening.
>> 
>> There are two ways to approach that operation – the easy way or the hard way
>> 
>> Easy way: rasterize the entire page containing transparency.  For extra credit, find the smallest bounding box for complete objects that are impacted and only rasterize those, leaving everything else intact.
>> 
>> Hard way: find the exact pieces that are impacted and rebuild new objects representing those, hopefully as vectors (but rasterizing as necessary)
>> 
>> On 6/8/16, 7:19 AM, ""Christoph Schäfer"" <christoph-schaefer at gmx.de> wrote:
>> 
>> >Hi all,
>> >
>> >
>> >According to https://sourceforge.net/p/lcms/mailman/lcms-user/thread/000001d1c02a%249a1ac4a0%24ce504de0%24%40littlecms.com/#msg35140820 the next version of lcms will support Alpha channels. I wonder if this can help us resolve the lack of transparency flattening in Scribus.
>> >
>> >One of the major obstacles of "selling" Scribus to users is that most printers who are asking for PDF/X-1a or PDF/X-3 files have no idea about the limitations of these standards. The reason is, of course, that InDesign flattens transparencies automatically, whereas Scribus doesn't have a mechanism like this.
>> >
>> >
>> >Christoph
>> >
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