Bug 134905

Summary: Bad result after exporting to PNG file
Product: LibreOffice Reporter: Petr Valach <petr.valach>
Component: DrawAssignee: Not Assigned <libreoffice-bugs>
Status: RESOLVED DUPLICATE    
Severity: normal CC: mikekaganski, petr.valach, raal, robert
Priority: medium Keywords: bibisected, bisected, regression
Version: 7.0.0.1 rc   
Hardware: All   
OS: Linux (All)   
Whiteboard:
Crash report or crash signature: Regression By:
Bug Depends on:    
Bug Blocks: 134906    
Attachments: Source file
First page
Second page
Result from LO 6.4.5

Description Petr Valach 2020-07-17 16:15:40 UTC 
Description:
After exportin to PNG file from Draw we get very bad results. Even text frames disappeare.

Steps to Reproduce:
1. Open file in attachment.
2. Go to menu File | Export.
3.Choose PNG type.

Actual Results:
First page - bad result, without correct transparency.
Second page - all text frames disappeared, bad transparency result.

Expected Results:
Result matches source file, as we get from LibreOffice 6.4.5.


Reproducible: Always


User Profile Reset: Yes



Additional Info:
Version: 7.0.0.1
Build ID: 04ba7e3f1e51af6c5d653e543a620e36719083fd
CPU threads: 2; OS: Linux 5.3; UI render: default; VCL: gtk3
Locale: cs-CZ (cs_CZ.UTF-8); UI: en-US
Calc: threaded
Comment 1 Petr Valach 2020-07-17 16:16:19 UTC 
Created attachment 163192 [details]
Source file
Comment 2 Petr Valach 2020-07-17 16:16:39 UTC 
Created attachment 163193 [details]
First page
Comment 3 Petr Valach 2020-07-17 16:17:06 UTC 
Created attachment 163194 [details]
Second page
Comment 4 Petr Valach 2020-07-17 16:19:08 UTC 
Created attachment 163195 [details]
Result from LO 6.4.5
Comment 5 Petr Valach 2020-07-17 16:22:58 UTC 
One important moment - you should check field Save transparency. But you will get really different results.
Comment 6 raal 2020-07-17 16:43:20 UTC 
Confirm with Version: 7.1.0.0.alpha0+
Build ID: fa844c15233f108a0e9b0b2e8c9757c1aa088a4b
CPU threads: 4; OS: Linux 4.15; UI render: default; VCL: gtk3
Locale: cs-CZ (cs_CZ.UTF-8); UI: en-US
Calc: threaded
Comment 7 raal 2020-07-17 17:03:19 UTC 
This seems to have begun at the below commit.
Adding Cc: to Mike Kaganski ; Could you possibly take a look at this one?
Thanks
 1346a232e449ab004077d170510ae00e5409680f is the first bad commit
commit 1346a232e449ab004077d170510ae00e5409680f
Author: Jenkins Build User <tdf@pollux.tdf>
Date:   Tue Jun 2 01:48:09 2020 +0200

    source 8c84448febf817875ad0d377de0f0b34987992cb

https://gerrit.libreoffice.org/c/core/+/94969
Use buffer with alpha in VclProcessor2D::RenderUnifiedTransparencePrimitive2D
Comment 8 Robert Großkopf 2020-07-18 07:49:22 UTC 
Isn't this a duplicate of https://bugs.documentfoundation.org/show_bug.cgi?id=134213 ?
Comment 9 Petr Valach 2020-07-18 08:27:37 UTC 

*** This bug has been marked as a duplicate of bug 134213 ***