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#1 2008-12-11 11:19:31

xelados
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Registered: 2007-06-02
Posts: 314
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Is there a way to get smoother lines in GIMP?

I use a Wacom Graphire 4 (with the latest linuxwacom and gimp, obviously) but when I make long, curving strokes, I get straight lines as if GIMP is just taking shortcuts and calculating lines instead of where the stylus actually goes. Here's a quick image for illustration:

crap-lines.png

I've tried customizing my tablet's settings, made sure it had the maximum resolution and boundaries, tried altering the softness, everything. Is this a limitation of GIMP or something? I've used Photoshop in wine and had no issues with it, but I prefer GIMP's interface and tools.

Last edited by xelados (2008-12-11 11:20:00)

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#2 2008-12-11 11:43:10

iBertus
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From: Greenville, NC
Registered: 2004-11-04
Posts: 2,228

Re: Is there a way to get smoother lines in GIMP?

Are you using the line tool or one of the drawing tools?

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#3 2008-12-11 12:08:56

xelados
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Registered: 2007-06-02
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Re: Is there a way to get smoother lines in GIMP?

That was made with the Brush tool.

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#4 2008-12-11 12:13:36

eldragon
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From: Buenos Aires
Registered: 2008-11-18
Posts: 1,029

Re: Is there a way to get smoother lines in GIMP?

have you tried drawing with another pointing device to make sure its not the tablet?, ive just did a small runtest and got smooth lines with my touchpad...while my usb laser mouse gave a more jerky movement..

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#5 2008-12-11 12:18:36

xelados
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Registered: 2007-06-02
Posts: 314
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Re: Is there a way to get smoother lines in GIMP?

It does the same thing with my mouse, as well. It's a simple Logitech laser mouse. The 'mouse' that goes to my Graphire also produces the same results.

Edit: This has always happened to me in GIMP, as far as I remember.

Edit2: I did some Googling, and it seems like this might be some sort of regression in Xorg somewhere, or the lack of a particular compile flag for linuxwacom. I'm looking into it now to see if I can find a fix.

Last edited by xelados (2008-12-11 14:07:45)

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#6 2008-12-11 14:32:02

anaconda
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Registered: 2008-12-10
Posts: 3

Re: Is there a way to get smoother lines in GIMP?

I had the same problem (with a normal mouse) when I tried gimp with an older and  slower machine..
With my "faster" computer it works well.. (fast= 2,6GHz pentium 4, 512MB RAM)

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#7 2008-12-11 15:01:20

xelados
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Registered: 2007-06-02
Posts: 314
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Re: Is there a way to get smoother lines in GIMP?

My current system is a 2.21 GHz Athlon 64, 1 GB RAM, GeForce 7600 GT 256 MB, running openbox with no login manager. Nothing important should lag.

I tried using "--disable-quirk-tablet-rescale" in the PKGBUILD for linuxwacom, and it didn't fix the problem. I'm beginning to think this is an issue with xorg itself...

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#8 2008-12-11 15:41:52

skottish
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From: Here
Registered: 2006-06-16
Posts: 7,942

Re: Is there a way to get smoother lines in GIMP?

I quick way to test if it's X is to install inkscape and try there.

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#9 2008-12-11 16:14:13

xelados
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Registered: 2007-06-02
Posts: 314
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Re: Is there a way to get smoother lines in GIMP?

Inkscape seems to have the problem, too, but it's harder to reproduce. This only happens when I move the stylus quickly. Slow movements render fine. Of course, some things in art require quick, sometimes long movements to get right, so it's not like I can just slow down and expect it to fix things.

Last edited by xelados (2008-12-11 16:32:33)

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#10 2008-12-11 16:59:42

eldragon
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From: Buenos Aires
Registered: 2008-11-18
Posts: 1,029

Re: Is there a way to get smoother lines in GIMP?

it must be related to the input driver, since my touchpad produces a smooth output while the laser mouse gives a jerky movement too......im not that worried since im no artist, just pointing out where to look at big_smile

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#11 2008-12-15 21:38:18

xelados
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Registered: 2007-06-02
Posts: 314
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Re: Is there a way to get smoother lines in GIMP?

Which package should I look into for submitting a bug (or finding a fix) then?

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#12 2008-12-16 15:24:37

whompus
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From: Durham. UK
Registered: 2005-08-09
Posts: 256

Re: Is there a way to get smoother lines in GIMP?

I have no problems with a graphire 3, can you post your xorg.conf and are you using the latest linuxwacom 0.8.2

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