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BUG: Text is displayed randomly between multiple drawString

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Stef

Post subject: BUG: Text is displayed randomly between multiple drawString

Posted: Mon Jan 11, 2010 1:21 am

Site Admin

Joined: Mon Dec 08, 2008 2:17 pm
Posts: 140

I noticed a couple of times that the text drawn by g.drawString and font.drawString tend to randomly start moving between the different render points.
I remember that Kev said that there was a bug in the font cache. It looks that's exactly what I'm having.

I noticed following patterns:
At startup the texts are always located correctly
randomly starts changing text rendering between font render positions. 'when some time has passed'
Hard to reproduce

Fonts used:
AngelCodeFont
UnicodeFont

It looks like when rendering a new text string the text is (re)used in the next render call
based on this ss

see http://battle.customwars.com/temp/ for screenshots.
see discussion1 and discussion2
related to http://slick.javaunlimited.net/viewtopic.php?t=2205
Slick Build #270

Last edited by Stef on Wed Mar 31, 2010 12:29 pm, edited 1 time in total.

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Chronocide

Post subject:

Posted: Sun Feb 07, 2010 7:25 am

Regular

Joined: Sun Dec 07, 2008 5:22 am
Posts: 238
Location: Vancouver, BC, Canada

I just encountered the same bug.
I have a unit on the screen with its health rendered in text.
The proper health is displayed for a little while and then it is replaced with the fps count.
As mentioned in one of the discussions this is only happens when many different strings are drawn.

Slick Build #270
LWJGL Version: 2.1.0

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If at first quads don't succeed tri tri again.

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Fnord

Post subject:

Posted: Mon Feb 08, 2010 5:13 pm

Joined: Sat Feb 06, 2010 4:29 pm
Posts: 40

Me too,
I only use g.drawString and g.drawLine.

After 2sec FPS count is on ever drawString.

when i set app.setShowFPS(false);

one string is on all positions.

Slick Build #270
LWJGL Version: 2.0b1

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tireswing

Post subject:

Posted: Mon Feb 08, 2010 5:32 pm

Joined: Wed Jan 27, 2010 4:23 pm
Posts: 10

I ran into this as well. Using a font that does not do display caching seems to fix the problem for me.

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Fnord

Post subject:

Posted: Mon Feb 08, 2010 6:09 pm

Joined: Sat Feb 06, 2010 4:29 pm
Posts: 40

tireswing wrote:

I ran into this as well. Using a font that does not do display caching seems to fix the problem for me.

which?
how?

(neverless BUG should be fixed)

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Vince

Post subject:

Posted: Mon Feb 08, 2010 7:28 pm

Regular

Joined: Thu May 21, 2009 10:25 am
Posts: 161
Location: France

Hi all !

I've got this problem too. Benoit talk about it and fix it with a patch in discussion 2.

Hope it will be fixed in future release.

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tireswing

Post subject:

Posted: Mon Feb 08, 2010 8:04 pm

Joined: Wed Jan 27, 2010 4:23 pm
Posts: 10

Quote:

which?
how?

When creating an instance of AngelCodeFont for instance, you can use a constructor that allows you to pass an argument to specify whether display caching is enabled...

Code:

Font myFont = new AngelCodeFont("res/data/fontfile.fnt", "res/data/fontpic.png", false);

The false disables display caching.

When using UnicodeFont, once the Unicode font is created, call setDisplayListCaching.

Code:

UnicodeFont font;
// ... create font here...
// ...
font.setDisplayListCaching(false);

This bug exists with the display list caching part. I agree it should be fixed, but to work around it, you can disable display list caching.

Cheers,
Joe

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kevglass

Post subject:

Posted: Sun Apr 04, 2010 11:04 am

Site Admin

Joined: Thu Jan 01, 1970 12:00 am
Posts: 3143

Applied Benoit's fix from the other thread.

In SVN.

Kev

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