bugGNU TeXmacs - Bugs: bug #64460, PDF images get lines missing when...

 
 

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bug #64460: PDF images get lines missing when printed or exported

Submitter:  jadelight
Submitted:  Sun 23 Jul 2023 03:28:19 PM UTC
   
 
Category:  PDF export Priority:  3 - Low
Item Group:  Error Status:  Postponed
Privacy:  Public Assigned to:  vdhoeven
Originator Name:  Open/Closed:  Open
Release:  None Release:  2.1.2
Fixed Release:  None Fixed Release: 
Keywords: 

Mon 07 Aug 2023 11:20:36 AM UTC, comment #3: 

We might make distillation the standard preference,
but this is a bit tricky: it might detoriate high quality PDF files or PDF files that use ad hoc extensions of the format.

For the moment, I keep the bug open as a reminder, but lowered the priority.

Joris van der Hoeven <vdhoeven>
Group administrator
Sun 30 Jul 2023 06:35:15 PM UTC, comment #2: 

Yes, this works! Are there any side effects if I disable either of those options?

comment #1:

> Indeed, when exported as hummus-generated (aka "texmacs native") pdf the attached beamer document may seem to have missing lines. Actually, the lines are present but painted white, and this is due to the slide title being painted white too : if one changes the title font color, the lines become of that color, and if the title is deleted, the lines appear black in the pdf.
>
> It is plausible the issue could just be due to the image itself not properly setting the lines' color before painting them. Also, AFAICT, this issue is a rare case of bad rendering of a pdf image with hummus, which justifies suspecting the image.
>
> In any case, when the issue is present changing the pdf generation preferences can fix it. One can either :
> -turn on the "distill encapsulated pdf images" preference (i.e.  before inclusion with hummus, preprocess the image with gs),
> -deactivate the native pdf export preference (i.e. use gs instead of hummus),

jadelight
Sun 30 Jul 2023 11:35:13 AM UTC, comment #1: 

Indeed, when exported as hummus-generated (aka "texmacs native") pdf the attached beamer document may seem to have missing lines. Actually, the lines are present but painted white, and this is due to the slide title being painted white too : if one changes the title font color, the lines become of that color, and if the title is deleted, the lines appear black in the pdf.

It is plausible the issue could just be due to the image itself not properly setting the lines' color before painting them. Also, AFAICT, this issue is a rare case of bad rendering of a pdf image with hummus, which justifies suspecting the image.

In any case, when the issue is present changing the pdf generation preferences can fix it. One can either :
-turn on the "distill encapsulated pdf images" preference (i.e.  before inclusion with hummus, preprocess the image with gs),
-deactivate the native pdf export preference (i.e. use gs instead of hummus),

Philippe Joyez <pjoyez>
Group Member
Sun 23 Jul 2023 03:28:19 PM UTC, original submission:  

To reproduce:
1. Open the attached tm file.
2. Print or export to pdf and observe the lines in the image are missing.

The pdf image is also attached.

jadelight

 

(Note: upload size limit is set to 16384 kB, after insertion of the required escape characters.)

Attached Files
file #54955:  pdf-export.tm added by jadelight (54KiB - application/octet-stream)
file #54956:  geometry.pdf added by jadelight (26KiB - application/pdf)

 

Depends on the following items: None found

Items that depend on this one: None found

 

Carbon-Copy List
  • -email is unavailable- added by vdhoeven (Updated the item)
  • -email is unavailable- added by pjoyez (Posted a comment)
  • -email is unavailable- added by jadelight (Submitted the item)
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    Follow 6 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2023-08-07 vdhoeven Priority5 - Normal 3 - Low
        StatusNone Postponed
        Assigned toNone vdhoeven
    2023-08-06 vdhoeven CategoryConversion PDF export
    2023-07-23 jadelight Attached File- Added pdf-export.tm, #54955
        Attached File- Added geometry.pdf, #54956

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