Bug 98932 - add "use indexed colours" checkbox in "compress image" dialog
Summary: add "use indexed colours" checkbox in "compress image" dialog
Status: NEW
Alias: None
Product: LibreOffice
Classification: Unclassified
Component: LibreOffice (show other bugs)
Version:
(earliest affected)
5.0.4.2 release
Hardware: All All
: lowest enhancement
Assignee: Not Assigned
URL:
Whiteboard:
Keywords:
Depends on:
Blocks: Image-Compression-Dialog
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Reported: 2016-03-28 11:51 UTC by Jérôme
Modified: 2023-11-19 09:03 UTC (History)
2 users (show)

See Also:
Crash report or crash signature:

Attachments
screenshot of the "compress image" dialog window (43.42 KB, image/png)
2016-03-28 11:51 UTC, Jérôme 		Details
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Description Jérôme 2016-03-28 11:51:55 UTC 
Created attachment 123900 [details]
screenshot of the "compress image" dialog window

In the "compress image" dialog, I would appreciate an option for using indexed colours when relevant.

For example, the png image format decreases the file size when using 256 indexed colours instead of "real" colours.
Comment 1 Adolfo Jayme Barrientos 2016-03-28 14:19:43 UTC 
This is an enhancement request
Comment 2 Jérôme 2019-09-26 20:07:40 UTC 
This bug still exists in version 6.3.1.2.
Comment 3 Jérôme 2022-02-26 13:27:56 UTC 
Note that this option has to be proposed for PNG output file only.

Besides the checkbox, maybe a "combobox" would define the number of colours in the index : 2, 4, 8, 16, 32, 64, 128, 256. This combobox would be enabled only if the checkbox is selected. The default value could be set to 256.

This bug still occurs with :
Version: 7.2.5.2.0+ / LibreOffice Community
Build ID: 711f8d38e9451cd2fd39b6963d2a3fc166f04cb1
CPU threads: 4; OS: Linux 4.9; UI render: default; VCL: gtk3
Locale: fr-FR (fr_FR.utf8); UI: fr-FR
Calc: threaded