JOGL Texture Demo: one more time

[mkiefte]

2008/12/28 Joel Uckelman <uckelman@nomic.net (uckelman@nomic.net)>

Thus spake “Michael Kiefte”:

If I uncomment canvas.display() at the end of mousePressed(), I only get
flicker on a click instead of the whole window going grey. That’s an
improvement, but it shouldn’t repaint the window on a click at all.

Does it flicker when you release?

No, it never flickers on release, only on press.

What happens if you add

-Dsun.awt.noerasebackground=true

• M.

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[uckelman]

Thus spake “Michael Kiefte”:

Thus spake “Michael Kiefte”:

If I uncomment canvas.display() at the end of mousePressed(), I only

get

flicker on a click instead of the whole window going grey. That’s an
improvement, but it shouldn’t repaint the window on a click at all.

Does it flicker when you release?

No, it never flickers on release, only on press.

What happens if you add

-Dsun.awt.noerasebackground=true

I get worse flickering and sometimes garbage during the flickering.

–
J.

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[Tim_M]

Was out all day. New class did the trick, looks fine now

From: Michael Kiefte mkiefte@dal.ca
To: VASSAL Engine Forums Mailing List messages@forums.vassalengine.org
Sent: Sunday, December 28, 2008 3:43:41 PM
Subject: Re: [Developers]Re: JOGL Texture Demo: one more time

Put a new version up here:

http://myweb.dal.ca/mkiefte/TextureDemo081228.zip

This might solve Tim’s antialiasing problem.

Tim, you only need to download and substitute this file:

http://myweb.dal.ca/mkiefte/TextureDemo.class

• M.

2008/12/28 Michael Kiefte <mkiefte@dal.ca (mkiefte@dal.ca)>

It’s antialiased inside the texture, but the edges aren’t?

This is what I have on mine (I don’t have a hardware accelerated video card – just a mobile Intel):

http://myweb.dal.ca/mkiefte/Screenshot-TextureDemo.png

I can solve the edges part by simply adding a black border around the map.

• M.

2008/12/28 Tim M <messages@forums.vassalengine.org (messages@forums.vassalengine.org)>

Ran it on my laptop (Vista32). Very smooth and quick. Only thing I noticed was anti-aliasing is not on/enabled?, jagged edges were evident on rotation along map edge. Video card is set to application controlled currently

Tim

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[mkiefte]

I get worse flickering and sometimes garbage during the flickering.

What does your cursor normally do when you click on a window? Does it do something funky?

• M.

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[mkiefte]

Okay good. That problem is solved.

• M.

2008/12/28 Timothy Mccarron <timothy.mccarron@sbcglobal.net (timothy.mccarron@sbcglobal.net)>

Was out all day. New class did the trick, looks fine now

From: Michael Kiefte <mkiefte@dal.ca (mkiefte@dal.ca)>
To: VASSAL Engine Forums Mailing List <messages@forums.vassalengine.org (messages@forums.vassalengine.org)>
Sent: Sunday, December 28, 2008 3:43:41 PM
Subject: Re: [Developers]Re: JOGL Texture Demo: one more time

Put a new version up here:

http://myweb.dal.ca/mkiefte/TextureDemo081228.zip

This might solve Tim’s antialiasing problem.

Tim, you only need to download and substitute this file:

http://myweb.dal.ca/mkiefte/TextureDemo.class

• M.

2008/12/28 Michael Kiefte <mkiefte@dal.ca (mkiefte@dal.ca)>

It’s antialiased inside the texture, but the edges aren’t?

This is what I have on mine (I don’t have a hardware accelerated video card – just a mobile Intel):

http://myweb.dal.ca/mkiefte/Screenshot-TextureDemo.png

I can solve the edges part by simply adding a black border around the map.

• M.

2008/12/28 Tim M <messages@forums.vassalengine.org (messages@forums.vassalengine.org)>

Ran it on my laptop (Vista32). Very smooth and quick. Only thing I noticed was anti-aliasing is not on/enabled?, jagged edges were evident on rotation along map edge. Video card is set to application controlled currently

Tim

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[uckelman]

Thus spake “Michael Kiefte”:

I get worse flickering and sometimes garbage during the flickering.

What does your cursor normally do when you click on a window? Does it do
something funky?

The only thing which happens for other windows is that they gain focus if
they didn’t already have it.

–
J.

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[mkiefte]

One more question:

When you added -Dsun.awt.noerasebackground=true

does it ever show what it’s supposed to or is it always garbage?

• M.

2008/12/29 Joel Uckelman <uckelman@nomic.net (uckelman@nomic.net)>

Thus spake “Michael Kiefte”:

I get worse flickering and sometimes garbage during the flickering.

What does your cursor normally do when you click on a window? Does it do
something funky?

The only thing which happens for other windows is that they gain focus if
they didn’t already have it.

–
J.

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[mkiefte]

Also, how do these demos look to you in Compiz:

https://jogl-demos.dev.java.net/

In particular, try the gears and rotate them with the mouse.

• M.

2008/12/29 Michael Kiefte <mkiefte@dal.ca (mkiefte@dal.ca)>

One more question:

When you added -Dsun.awt.noerasebackground=true

does it ever show what it’s supposed to or is it always garbage?

• M.

2008/12/29 Joel Uckelman <uckelman@nomic.net (uckelman@nomic.net)>

Thus spake “Michael Kiefte”:

I get worse flickering and sometimes garbage during the flickering.

What does your cursor normally do when you click on a window? Does it do
something funky?

The only thing which happens for other windows is that they gain focus if
they didn’t already have it.

–
J.

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[uckelman]

Thus spake “Michael Kiefte”:

One more question:

When you added -Dsun.awt.noerasebackground=true

does it ever show what it’s supposed to or is it always garbage?

It’s garbage until the map is loaded, and then similar garbage briefly
flickers in on each mouse button press. The rest of the time it looks
the way it should. Would you like a screenshot of the garbage?

–
J.

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[uckelman]

Thus spake “Michael Kiefte”:

Also, how do these demos look to you in Compiz:

jogl-demos.dev.java.net/

In particular, try the gears and rotate them with the mouse.

The gears flicker also whenever I do a mouse press.

–
J.

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[mkiefte]

It’s garbage until the map is loaded, and then similar garbage briefly
flickers in on each mouse button press. The rest of the time it looks
the way it should. Would you like a screenshot of the garbage?

Would it help?

For some reason, Compiz is compelled to clear the canvas more often. I’ll work on a possible solution today.

Let me know how the gears demo goes. I suspect it will have the same problem, but if it doesn’t, then I’ll check its source.

• M.

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[uckelman]

Thus spake “Michael Kiefte”:

It’s garbage until the map is loaded, and then similar garbage briefly
flickers in on each mouse button press. The rest of the time it looks
the way it should. Would you like a screenshot of the garbage?

Would it help?

No, I just thought you might like screenshots of garbage.

For some reason, Compiz is compelled to clear the canvas more often. I’ll
work on a possible solution today.

Let me know how the gears demo goes. I suspect it will have the same
problem, but if it doesn’t, then I’ll check its source.

Already have. It flickers on mouse presses too.

–
J.

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[uckelman]

Thus spake “Michael Kiefte”:

It’s garbage until the map is loaded, and then similar garbage briefly
flickers in on each mouse button press. The rest of the time it looks
the way it should. Would you like a screenshot of the garbage?

Would it help?

For some reason, Compiz is compelled to clear the canvas more often. I’ll
work on a possible solution today.

Let me know how the gears demo goes. I suspect it will have the same
problem, but if it doesn’t, then I’ll check its source.

I discovered something just now: The flicker seems to be caused by the
background being painted without the foreground also being painted. I
can see this clearly if I call setBackground(Color.GREEN) on the canvas,
as the flickering becomes bright green.

–
J.

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[mkiefte]

This is a longshot:

-Dsun.java2d.noddraw=true

• M.

2008/12/29 Joel Uckelman <uckelman@nomic.net (uckelman@nomic.net)>

Thus spake “Michael Kiefte”:

It’s garbage until the map is loaded, and then similar garbage briefly
flickers in on each mouse button press. The rest of the time it looks
the way it should. Would you like a screenshot of the garbage?

Would it help?

For some reason, Compiz is compelled to clear the canvas more often. I’ll
work on a possible solution today.

Let me know how the gears demo goes. I suspect it will have the same
problem, but if it doesn’t, then I’ll check its source.

I discovered something just now: The flicker seems to be caused by the
background being painted without the foreground also being painted. I
can see this clearly if I call setBackground(Color.GREEN) on the canvas,
as the flickering becomes bright green.

–
J.

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[uckelman]

Thus spake “Michael Kiefte”:

This is a longshot:

-Dsun.java2d.noddraw=true

• M.

That makes the flickering black instead of grey.

J.

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[mkiefte]

2008/12/29 Joel Uckelman <uckelman@nomic.net (uckelman@nomic.net)>

Thus spake “Michael Kiefte”:

This is a longshot:

-Dsun.java2d.noddraw=true

• M.

That makes the flickering black instead of grey.

That’s not what I expected. What happens if you change the background alpha to 0x00? I’m guessing you get the garbage back. And then I would try the 0x00 alpha with the -Dsun.java2d.noddraw=true switch.

Any ideas of what method gets the background colour? paint() and update() are already overridden in GLCanvas. What else is there?

• M.

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[uckelman]

Thus spake “Michael Kiefte”:

That makes the flickering black instead of grey.

That’s not what I expected. What happens if you change the background alpha
to 0x00? I’m guessing you get the garbage back. And then I would try the
0x00 alpha with the -Dsun.java2d.noddraw=true switch.

In both cases, the alpha component is ignored—when I set the background
to Color(255,0,0,0) I see pure red. I think this is because heavyweight
components are always opaque.

Any ideas of what method gets the background colour? paint() and update()
are already overridden in GLCanvas. What else is there?

I’ve been looking at the source for GLCanvas, and all paint() does is call
display(), which in turn seems only to call GLEventListener.display().

So, I’m not sure where the background is actually painted—something called
from TextureDemo.display() must be doing it, since I don’t see any calls to
super.paint() anywhere.

–
J.

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[mkiefte]

Here’s another longshot:

-Dsun.java2d.opengl.fbobject=false

The desktop manager is clearing your window without calling a Java method at all. When you have direct draw enabled, setting the background colour calls a native method that sets the background colour for the window. When you added -Dsun.java2d.noddraw=true, the desktop no longer knew what the correct background colour was according to the JVM.

Now the problem is, why would the desktop clear without calling a repaint?

• M.

2008/12/29 Joel Uckelman <uckelman@nomic.net (uckelman@nomic.net)>

Thus spake “Michael Kiefte”:

That makes the flickering black instead of grey.

That’s not what I expected. What happens if you change the background alpha
to 0x00? I’m guessing you get the garbage back. And then I would try the
0x00 alpha with the -Dsun.java2d.noddraw=true switch.

In both cases, the alpha component is ignored—when I set the background
to Color(255,0,0,0) I see pure red. I think this is because heavyweight
components are always opaque.

Any ideas of what method gets the background colour? paint() and update()
are already overridden in GLCanvas. What else is there?

I’ve been looking at the source for GLCanvas, and all paint() does is call
display(), which in turn seems only to call GLEventListener.display().

So, I’m not sure where the background is actually painted—something called
from TextureDemo.display() must be doing it, since I don’t see any calls to
super.paint() anywhere.

–
J.

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[uckelman]

Thus spake “Michael Kiefte”:

Here’s another longshot:

-Dsun.java2d.opengl.fbobject=false

That doesn’t help. It also degrades performance noticeably.

J.

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[mkiefte]

I actually expected it to degrade performance…

It turns out that there are a lot of posts on this on the Internet, but no solution. Do a google search for compiz and jogl and you’ll see the same problem described by multiple people.

• M.

2009/1/2 Joel Uckelman <uckelman@nomic.net (uckelman@nomic.net)>

Thus spake “Michael Kiefte”:

Here’s another longshot:

-Dsun.java2d.opengl.fbobject=false

That doesn’t help. It also degrades performance noticeably.

–
J.

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