Bug 150274 - Grey bottom/right border appear exporting a black-area page to PNG
Summary: Grey bottom/right border appear exporting a black-area page to PNG
Status: NEW
Alias: None
Product: LibreOffice
Classification: Unclassified
Component: Writer (show other bugs)
Version:
(earliest affected)
7.2.7.2 release
Hardware: All All
: medium normal
Assignee: Not Assigned
URL:
Whiteboard:
Keywords:
Depends on:
Blocks: Graphics-Export
  Show dependency treegraph
 
Reported: 2022-08-05 07:07 UTC by Mike Kaganski
Modified: 2022-08-11 20:14 UTC (History)
2 users (show)

See Also:
Crash report or crash signature:


Attachments
zoom on overlapped border after export by 7.4.0.2 (3.60 KB, image/png)
2022-08-11 20:14 UTC, Stéphane Guillou (stragu)
Details

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Description Mike Kaganski 2022-08-05 07:07:09 UTC
1. Create a new text document
2. In page style, set area to black color
3. Optional (for better visibility): set page size to 5x5 cm
4. Export the document to PNG (with default settings, like 96 PPI, any compression, interlaced, save transparency).

The resulting PNG has a grey border at bottom and right.
Comment 1 Mike Kaganski 2022-08-05 07:17:26 UTC
Note that the page style uses "Background cover margins" option [1].

[1] https://git.libreoffice.org/core/commit/56d8007a197b095b09423c691a51515567648e80 by Michael Stahl
Comment 2 Stéphane Guillou (stragu) 2022-08-11 20:05:39 UTC
Confirmed with:

Version: 7.4.0.2 / LibreOffice Community
Build ID: 1512ce97d7ed39dce3121f7e15651fd8895f950e
CPU threads: 8; OS: Linux 5.15; UI render: default; VCL: gtk3
Locale: en-AU (en_AU.UTF-8); UI: en-US
Calc: threaded

Looks like it's a border of one pixel width of grey and one pixel width (outermost) of full transparency (see attachment).
Comment 3 Stéphane Guillou (stragu) 2022-08-11 20:12:05 UTC
The transparent border is in 7.4.0.2 but not in 7.2.7.2. Only the grey border in that one.

Version: 7.2.7.2 / LibreOffice Community
Build ID: 8d71d29d553c0f7dcbfa38fbfda25ee34cce99a2
CPU threads: 8; OS: Linux 5.15; UI render: default; VCL: gtk3
Locale: en-AU (en_AU.UTF-8); UI: en-US
Calc: threaded
Comment 4 Stéphane Guillou (stragu) 2022-08-11 20:14:14 UTC
Created attachment 181732 [details]
zoom on overlapped border after export by 7.4.0.2

PNG export is overlapped on other picture in GIMP. 1 pixel-wide grey band and 1 pixel-wide transparent border are visible.