Q4OS Forum

BobbyBee

Member

Registered: 2017-03-25

Posts: 14

Colourful Anti-aliasing in GIMP

On Q4OS there is an anti-aliasing problem with GIMP. I checked and it does not appear on a clean Debian installation with TDE 14.0.4.

The problem occurs when adding text to an image, most apparently white text on black background. The edges of the characters that should normally show a gradient, in this example from white to black, have various colours. The attached image shows an example with and without anti-aliasing. See also the attachment in the next comment.

Last edited by BobbyBee (2017-04-11 13:17)

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Attachments:
gimp-anti-aliasing-q4os.png, Size: 18.28 KiB, Downloads: 668

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Q4OS 1.8.3 Orion i386, amd64

BobbyBee

Member

Registered: 2017-03-25

Posts: 14

Re: Colourful Anti-aliasing in GIMP

I tested this issue on the same machine with the same hardware. The attached image here was made on Debian 8.7 with TDE 14.0.4. As you can see, anti-aliasing is done correctly.

Could this be a library-related problem on Q4OS?

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Attachments:
gimp-anti-aliasing-debian-tde.png, Size: 12.9 KiB, Downloads: 667

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Q4OS 1.8.3 Orion i386, amd64

Dai_trying

Member

From: UK

Registered: 2015-12-14

Posts: 2,989

Re: Colourful Anti-aliasing in GIMP

I can't offer any reason but can say this is the same effect when using Scorpion and GIMP 2.8.18.

q4osteam

Q4OS Team

Registered: 2015-12-06

Posts: 4,257

Website

Re: Colourful Anti-aliasing in GIMP

This is no bug, but a setting. You can configure 'RGB sub-pixel hinting' for GTK2 applications in '$HOME/.gtkrc-q4os' file by editing line:

gtk-xft-rgba="none"

For GTK3 applications edit the same line in '$HOME/.config/gtk-3.0/settings.ini' file.

q4osteam

Q4OS Team

Registered: 2015-12-06

Posts: 4,257

Website

Re: Colourful Anti-aliasing in GIMP

You can also switch off 'sub-pixel hinting' specifically for Gimp, by configuration fonts options tool. We guess it would be a better way, as it will preserve system fonts look for other applications.

bin

Member

From: U.K.

Registered: 2016-01-28

Posts: 1,300

Re: Colourful Anti-aliasing in GIMP

Great tips - thanks team!

BobbyBee

Member

Registered: 2017-03-25

Posts: 14

Re: Colourful Anti-aliasing in GIMP

Great tips indeed. Thanks!

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Q4OS 1.8.3 Orion i386, amd64