Bug 150830

Summary:	Highlighting made with Adobe Reader is rendered by a pattern over the text
Product:	LibreOffice	Reporter:	Xavier R <x.rolland>
Component:	Draw	Assignee:	Not Assigned <libreoffice-bugs>
Status:	RESOLVED DUPLICATE
Severity:	normal	CC:	rafael.palma.lima, x.rolland
Priority:	medium	Keywords:	filter:pdf
Version:	7.2.7.2 release
Hardware:	All
OS:	All
See Also:	https://bugs.documentfoundation.org/show_bug.cgi?id=44731
Whiteboard:
Crash report or crash signature:		Regression By:
Bug Depends on:
Bug Blocks:	99746
Attachments:	Test page with highlighting produced with Writer. No problem here. PDF test page, highlighted with Adobe Acrobat Reader Raw PDF test page Highlighted PDF, exported as Jpeg by Draw (LO 7.3.5.2) Highlighted PNG, exported as Png with transparency by Draw (LO 7.3.5.2)

Description Xavier R 2022-09-06 15:17:15 UTC

Description:
Highlighting made with Adobe Acrobat Reader (free-paid tool of the free-paid software) is rendered by a opaque pattern over the text. Text is masked, unreadable.
And stay masked if you export as PDF.

In a first view i thought that it was a problem of order of rendering (over/under text), but as the color is altered (darker), it's a problem of transparency rendering.

Steps to Reproduce:
1. Open a PDF file with Adobe Acrobat Reader
2. Highlight some words or sentences
3. Save as a new PDF
4. Open it in LibreOffice Draw

Actual Results:
--> Highlighting appears as a opaque pattern over the text, covering it, by the way, and keeping it unreadable.

Expected Results:
Highlighting should be rendered as highlighting (Adobe Reader can be used only on texts)

As easier workarounds, it may be rendered
- by a pattern with transparency over the text (*better*)
- or, by a pattern without transparency under the text (*worst* as colors are affected)


Reproducible: Always


User Profile Reset: No



Additional Info:

Note that the highlighting is well rendered (not covering the text) in:
Microsoft Edge
Firefox
Gimp

Experimented with : 
LibreOffice 7.2.7.2
Adobe Acrobat Reader 2022.001.20142
on Win 11

Comment 1 Xavier R 2022-09-06 15:17:36 UTC

Version: 7.2.7.2 (x64) / LibreOffice Community
Build ID: 8d71d29d553c0f7dcbfa38fbfda25ee34cce99a2
CPU threads: 12; OS: Windows 10.0 Build 22000; UI render: Skia/Vulkan; VCL: win
Locale: fr-FR (fr_FR); UI: fr-FR
Calc: CL

Comment 2 Xavier R 2022-09-06 15:18:53 UTC

Created attachment 182261 [details]
Test page with highlighting produced with Writer.
No problem here.

Comment 3 Xavier R 2022-09-06 15:23:28 UTC

Comment on attachment 182261 [details]
Test page with highlighting produced with Writer.
No problem here.

Test page with highlighting produced with Writer, as a control sample

Comment 4 Xavier R 2022-09-06 15:26:01 UTC

Created attachment 182262 [details]
PDF test page, highlighted with Adobe Acrobat Reader

To open with Draw to see if the bug occurs, i.e. if the 2 first text lines  are masked.

Comment 5 Xavier R 2022-09-06 15:26:51 UTC

Created attachment 182263 [details]
Raw PDF test page

Raw PDF test page, with no highlighting

Comment 6 Xavier R 2022-09-06 15:32:54 UTC

It occurs also with LO 7.3.5.2 (portable) on win11

Version: 7.3.5.2 (x86) / LibreOffice Community
Build ID: 184fe81b8c8c30d8b5082578aee2fed2ea847c01
CPU threads: 12; OS: Windows 10.0 Build 22000; UI render: Skia/Vulkan; VCL: win
Locale: fr-FR (fr_FR); UI: fr-FR
Calc: CL

Comment 7 Xavier R 2022-09-06 15:34:30 UTC

Created attachment 182264 [details]
Highlighted PDF, exported as Jpeg by Draw (LO 7.3.5.2)

Comment 8 Xavier R 2022-09-06 15:35:38 UTC

Created attachment 182265 [details]
Highlighted PNG, exported as Png with transparency by Draw (LO 7.3.5.2)

Comment 9 Xavier R 2022-09-06 19:24:54 UTC

It occurs also on Ubuntu with LibO 7.2.7.2:

Version: 7.2.7.2 / LibreOffice Community
Build ID: 20(Build:2)
CPU threads: 4; OS: Linux 5.4; UI render: default; VCL: gtk3
Locale: fr-FR (fr_FR.UTF-8); UI: fr-FR
Ubuntu package version: 1:7.2.7-0ubuntu0.20.04.1~lo1
Calc: threaded

Comment 10 Rafael Lima 2022-09-07 15:09:40 UTC

Repro with

Version: 7.5.0.0.alpha0+ / LibreOffice Community
Build ID: 9ba1e1486bf3fcccf98da93d3963b3d4036705a9
CPU threads: 16; OS: Linux 5.15; UI render: default; VCL: kf5 (cairo+xcb)
Locale: pt-BR (pt_BR.UTF-8); UI: en-US
Calc: threaded

And also with

Version: 7.2.7.2 / LibreOffice Community
Build ID: 8d71d29d553c0f7dcbfa38fbfda25ee34cce99a2
CPU threads: 16; OS: Linux 5.15; UI render: default; VCL: kf5 (cairo+xcb)
Locale: pt-BR (pt_BR.UTF-8); UI: en-US
Calc: threaded

It appears we have two problems:
- The Z order seems to be wrong. I guess the correct would be to have the text above the highlight
- Transparency is not being applied. I don't know the exact value, but it seems to be around 70%)

Comment 11 Timur 2022-09-07 17:51:29 UTC

Seems a duplicate.

*** This bug has been marked as a duplicate of bug 93200 ***

Comment 12 Xavier R 2022-09-08 11:41:57 UTC

(In reply to Timur from comment #11)
> Seems a duplicate.
> 
> *** This bug has been marked as a duplicate of bug 93200 ***

Thanks  @Timur for liking to an older report that I didn't found.