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GLCtrl display error on Vista [message #16549]

Tue, 24 June 2008 19:14

kodos
Messages: 111
Registered: March 2008

Experienced Member

Hi,

I think I have no luck with the GLCtrl Wink

On my Vista x64 SP1 PC the OpenGL example has some display problems. If I move the mouse over the window than I can see the animation, but when I don't move the cursor I will just get a white screen.

This happens with and without Ctrl::GlobalBackPaint() .

Thanks in advance Smile

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Re: GLCtrl display error on Vista [message #16550 is a reply to message #16549]

Tue, 24 June 2008 21:54

gertwin
Messages: 25
Registered: May 2007
Location: Netherlands

Promising Member

The same behavior is on linux systems with compiz desktop effects enabled.
On the ubuntu forum this is reported on cards using the ati driver (like i have).
Disabling desktop effects solves the problem.

Maybe on vista the same is true, i don't think it is UPP or OpenGL related.

Gertwin

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Re: GLCtrl display error on Vista [message #16554 is a reply to message #16549]

Wed, 25 June 2008 15:02

kodos
Messages: 111
Registered: March 2008

Experienced Member

I have tested the OpenGL example on Linux with and without Compiz enabled and everything works for me as expected. But I have a Nvidia card.

And other applications based on OpenGL also work under Vista so this seems to be a problem with UPP.

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Re: GLCtrl display error on Vista [message #16566 is a reply to message #16549]

Thu, 26 June 2008 20:02

kodos
Messages: 111
Registered: March 2008

Experienced Member

Some updates:
- If I run the OpenGL example in the WinXP compatibility mode everything works as expected
- If I turn of the desktop effects on Vista the problem is still there, so I don't think it has something to do with it

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Re: GLCtrl display error on Vista [message #16570 is a reply to message #16549]

Fri, 27 June 2008 12:59

kodos
Messages: 111
Registered: March 2008

Experienced Member

OK, I think I have found the problem.

http://www.opengl.org/pipeline/article/vol003_7/

If I set the PFD_SUPPORT_COMPOSITION flag on the OpenGL context and WS_CLIPCHILDREN, WS_CLIPSIBLINGS on the main window I can get it to work but now we have to InvalidateRect the DhCtrls individually.

I have not included a patch because my current solution is just a hack and I don't know how I should implement this in a proper manner.

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Re: GLCtrl display error on Vista [message #16611 is a reply to message #16570]

Wed, 02 July 2008 10:53

mirek
Messages: 14257
Registered: November 2005

Ultimate Member

Thanks for hints! It helped a lot.

Please check the attached "official" patch. I believe it is OK now.

Mirek

Attachment: patch.zip
(Size: 1.78KB, Downloaded 338 times)

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Re: GLCtrl display error on Vista [message #16616 is a reply to message #16549]

Wed, 02 July 2008 15:48

kodos
Messages: 111
Registered: March 2008

Experienced Member

Thank you very much, it works perfectly Smile

Another small thing: Is the
pragma comment( lib, "glaux.lib" )
really necessary? I don't have this lib and I just uncomment this line and it works fine Smile

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Re: GLCtrl display error on Vista [message #16621 is a reply to message #16616]

Wed, 02 July 2008 22:45

mirek
Messages: 14257
Registered: November 2005

Ultimate Member

kodos wrote on Wed, 02 July 2008 09:48

Thank you very much, it works perfectly Smile

Another small thing: Is the
pragma comment( lib, "glaux.lib" )
really necessary? I don't have this lib and I just uncomment this line and it works fine Smile

Ehm, not sure Smile

Have you tried with XP, Win2K and Win98?

Mirek

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Re: GLCtrl display error on Vista [message #16625 is a reply to message #16549]

Thu, 03 July 2008 06:58

kodos
Messages: 111
Registered: March 2008

Experienced Member

I tried with Win XP and Vista, but I think if it compiles without the lib it doesn't need it. If there are no functions called from the lib how should it not work without it?

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Re: GLCtrl display error on Vista [message #16630 is a reply to message #16625]

Thu, 03 July 2008 15:33

mirek
Messages: 14257
Registered: November 2005

Ultimate Member

kodos wrote on Thu, 03 July 2008 00:58

I tried with Win XP and Vista, but I think if it compiles without the lib it doesn't need it. If there are no functions called from the lib how should it not work without it?

OK, glaux removed.

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Re: GLCtrl display error on Vista [message #18444 is a reply to message #16549]

Wed, 01 October 2008 14:50

kodos
Messages: 111
Registered: March 2008

Experienced Member

Hi,

I think I have to open this thread again.
The problem is still there with the flickering in Vista, even if it is far better with the patch from luzr.
After I have reread the article on opengl.org I think I have found the problem. The WS_CLIPCHILDREN and WS_CLIPSIBLINGS have to be set on the parent window of the OpenGl control, not on the control itself.
With the following changes I haven't noticed any flickering yet:

TopWin32.cpp:86

style |= WS_CAPTION|WS_CLIPSIBLINGS|WS_CLIPCHILDREN;

CtrlCore.h:1767

void Refresh() { InvalidateRect(GetHWND(), NULL, false); }

I don't call the Refresh() from Ctrl because in my tests it is not needed, but I have just done my tests with the GLCtrl Wink

and I don't know exactly what Refresh is doing.

DHCtrl.cpp:36

CreateWindowEx(0, "UPP-CLASS-A", "",
		               WS_CHILD|WS_DISABLED|WS_VISIBLE,
		               0, 0, 20, 20,
		               phwnd, NULL, hInstance, this);

The WS_CLIPSIBLINGS and WS_CLIPCHILDREN styles can be removed from here again.

But I don't know if this changes have some side effects with other controls that derive from DHCtrl, I really just know the GLCtrl and my custom CairoCtrl. Smile

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Re: GLCtrl display error on Vista [message #18465 is a reply to message #18444]

Thu, 02 October 2008 09:25

mirek
Messages: 14257
Registered: November 2005

Ultimate Member

Well, it required a little bit more attention, using these flags only when DHCtrl is present (in theory, performance affected, also, more interactions are possible) and finding a way how to make Ctrl::Refresh work instead of implementing it in DHCtrl.

Hopefuly, it should now work without affecting anything else.

Please check (will be on svn mirror in 40 minutes).

Mirek

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Re: GLCtrl display error on Vista [message #18472 is a reply to message #16549]

Thu, 02 October 2008 19:14

kodos
Messages: 111
Registered: March 2008

Experienced Member

Thanks for the update.

I have tested the changes a little bit, and it's better now.
The only problem now, there is still a flash, when the GLCtrl is shown the first time, that one isn't there with my solution. I don't know exactly why, but I think the SyncCaption function is called a bit "to late", but I'm really not sure Wink

.

But I have found some confusing things:

- If I comment out the line:

if(hasdhctrl)
		style |= WS_CLIPSIBLINGS|WS_CLIPCHILDREN;

from SyncCaption it changes nothing. Actually I thought with this change it should be worse again but it isn't... Probably beacause of the new refresh function but I'm not sure.

- If I just comment out the if, the first flash is also gone.

EDIT: I just want to say that the first flash that is still there isn't really that bad, so if it's to complicated to fix it I think we could just leave it as it is.

[Updated on: Thu, 02 October 2008 19:15]

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