Scribusoid

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71
General Discussion / Re: Kannada Font
« Last post by Yamamaxnano on October 04, 2017, 10:18:50 am »
Darüber hinaus, was wir am meisten finden wollen, ist die Fähigkeit.
72
Showcase / Simple newspaper
« Last post by Eneen on October 04, 2017, 09:33:41 am »
I'd like to thank all Scribus Devs and people here for support.
Here is newspaper I create completely in FOSS software with free libs and pictures. Links to last 3 editions:
http://gazetabytomska.pl/wp-content/uploads/2017/09/kliknij-tu-2.pdf
http://gazetabytomska.pl/wp-content/uploads/2017/09/kliknij-tu-1.pdf
http://gazetabytomska.pl/wp-content/uploads/2017/09/kliknij-tu.pdf
Hope you like it. Any comments appreciated.
Please note, that this is time-is-money quick project and 1 edition is created in maximum 2 working days only by me (yeah, there is also Editor in Chief) so layout should simple and efficient.
Main fonts are Noto Serif, Roboto Slab, Noto Sans and Khand for titles. I have to say, that Noto Serif works really good for me, as it has so good kerning that just "flows" if you know what I mean.
73
PDF Generation / Re: [SOLVED] PDF/X-1a exports with sRGB colorspace instead of CMYK
« Last post by mnawij on October 04, 2017, 01:28:00 am »
https://www.qoppa.com/pdfstudio/

It is not free option, but it is a pdf editor for linux.  I will have to ask my friend to see if you can use it to identify colorspaces of images.

mnawij
74
Bitmap Images / Rounding error on bitmap edges?
« Last post by anna105 on October 04, 2017, 12:48:13 am »
I am working on translated comics. I have scanned and well positioned images that fill entire pages. Sometimes there are facing pages with one big divided picture on them. They have to fit perfectly together.

When I put these images in the frames filling the pages and exporting them as bitmaps, there are strange effects on some edges. First (or last) pixel rows (or columns) are brighter then needed. Sizes and positions are perfect (I think). It seems to be a rounding effect. It's not a simple screen rendering issue. Exported bitmaps show the same effect.

Its not a big deal when you have big images (let's say 2000×3000 pixel). You can't notice it unless you put together two exported facing pages. There will be an ugly bright line in the middle.

In short: I have input bitmaps that fit perfectly and seamless together in GIMP or PS. I import them into Scribus and do some work (new text layer). I export it as bitmap images. These images have the mentioned wrong lines on edges.

My workaround: I slightly increase the image size by decreasing the original 300 dpi to 299,7. Starting coordinates must be changed to center the image in the frame. I will lost some image information on edges. In case of facing pages there are no bright lines but missing parts and that can be noticeable too.

I made an example. To make it more obvious I made the image and the page size very little. The input image is black to make brightened lines more noticeable. On the exported bitmap you can see on the left side a nearly white pixel column. On the top a light gray pixel row. A rounding/rendering bug?
75
PDF Generation / Re: PDF/X-1a exports with sRGB colorspace instead of CMYK
« Last post by jghali on October 03, 2017, 02:48:17 pm »
Probably I am a little bit off-topic, but is there a way in Linux to see if a pdf has mixed objects with different colours?
Thank you in advance

I don't know many free solutions on Linux and the solution I know is rather for PDF specialists: Podofobrowser is a PDF object and streams viewer based on PoDoFo library. You'll likely have to compile it by yourself, its sources can be downloaded from sourceforge: https://sourceforge.net/projects/podofo/files/podofobrowser/. Even if it's not quite maintained anymore, it's still a useful tool I regularly use for PDF files debugging.
76
ImageMagic identify command is not reliable for PDFs. One of the basic reason for that is that each object in a PDF can have a different colorspace. So a PDF does not have a colorspace by itself.

Ok, this makes sense.

I've extracted the primary content stream out of my PDF using this command:

$ qpdf --show-pages mypdf.pdf
page 1: 11 0 R
  content:
    10 0 R

$ qpdf --show-object=10 --filtered-stream-data mypdf.pdf > stream.data


This seems to correctly decompress object 10 and write it to a file. The result is simple ASCII text, that seems to be a PDF Graphics definition (cheat sheet @ https://github.com/gendx/pdf-cheat-sheets/blob/master/pdf-graphics.clean.pdf).

Using the cheat sheet above, and realizing the format uses postfix notation, I can see several lines with color information ending with "k", indicating CMYK. For example:

0.65490 0.00000 0.30980 0.00000 k

Also, I see no lines ending with "rg" indicating an RGB color.

Therefore, all good!

Thanks,
Raman
77
PDF Generation / Re: PDF/X-1a exports with sRGB colorspace instead of CMYK
« Last post by radu81 on October 02, 2017, 11:46:14 pm »
Probably I am a little bit off-topic, but is there a way in Linux to see if a pdf has mixed objects with different colours?
I try to explain better, at work when I export in pdf from ID or AI, I use to open the pdf file with Acrobat and do a preflight and check if there are any RGB objects left into pdf. I didn't find a way to do a similar job with linux, so I copied my pdf file to an USB stick and tested at work with Acrobat. There were no RGB or other colours different into the pdf file, everything seems fine, but like I said I would like to do this tests at home under Linux if possible.

Thank you in advance
78
PDF Generation / Re: PDF/X-1a exports with sRGB colorspace instead of CMYK
« Last post by jghali on October 02, 2017, 02:49:30 pm »
ImageMagic identify command is not reliable for PDFs. One of the basic reason for that is that each object in a PDF can have a different colorspace. So a PDF does not have a colorspace by itself.
79
Layout Issues / Re: Measurements Entry issues...
« Last post by a.l.e on October 02, 2017, 09:00:07 am »
hi

thanks for the details!
now i see what the problem is!

and there seems indeed to be an issue there...

during the weekend i browsed through the bug tracker and here it is :

https://bugs.scribus.net/view.php?id=9933

i've linked your detailed walk through from the issue!

i seem to recall that thres has been a discussion in the past about picas, about stopping supporting dot values, because they don't make much sense.
but i haven't seen a pica in my whole life, so i'm not sure my memories are right...

all in all, it would be nice to have picas to work correctly in scribus, but i fear that we need somebody affected by the issue to fix it...
there are probably very few scribus users who need picas... and there are issues that are much more important.
but it might be something easy to fix by somebody who knows that part of code and  we might see miracles in the near feature... who knows?
80
Layout Issues / Re: Measurements Entry issues...
« Last post by utnik on October 01, 2017, 12:25:31 am »
hi portreve

Hmm... Ok, but shouldn't 0 actually represent 0 thickness?

either i need a line or i don't need it. in the first case it should be more than 0 (whatever unit) wide, in the second case i set the color to 'none' (independent of the line width…)

utnik

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