[Libreoffice-bugs] [Bug 128888] Transparent objects causing excessive CPU usage when exporting PNG from LO Draw

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=128888

Buovjaga <ilmari.lauhakangas at libreoffice.org> changed:

           What    |Removed                     |Added
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                 CC|                            |ilmari.lauhakangas at libreoff
                   |                            |ice.org

--- Comment #7 from Buovjaga <ilmari.lauhakangas at libreoffice.org> ---
I don't observe any exceptional CPU cycles when the export dialog is open.
Sure, it uses some CPU for a couple of seconds while exporting (both on Windows
and Linux). How is this a bug, though?

"Power usage and export time should be essentially no different for transparent
objects on a slide when exporting to PNG as opposed to another format like
TIFF."

Why not? They are different formats after all with their own compression
methods. Notice there is a slider for compression level in the PNG export
dialog.

Arch Linux 64-bit
Version: 7.0.0.0.alpha0+
Build ID: 6a9c7409ee617b79c327dd7ea4de432f448b6006
CPU threads: 8; OS: Linux 5.6; UI render: default; VCL: kf5; 
Locale: fi-FI (fi_FI.UTF-8); UI-Language: en-US
Calc: threaded
Built on 24 April 2020

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