[SOLVED] Operating System Rendering Issues

[CrazyEddie]

Excellent; works perfectly on XP now! Thank you for all your help,

Cool, no problem - glad you now have it working.

and I do apologize any accusations I might have unintentionally implied towards your DirectX81Renderer.

Not at all. It's perfectly feasible that there might have been a bug, nobody writes perfect - bug free - software and I'm no different to anybody else in this regard. The only advantage I have here is an intimate familiarity with the CEGUI code, though again, I'm not always right by any stretch of the imagination

CE.

[Jamarr]

So the problem was that the renderer did not have the correct viewport size, and thus was fixed by manually calling setDisplaySize()? I'm not very familiar with the DX renderers, but doesn't the constructor for that renderer try to automatically query the viewport size? For this to fail would have to mean 1) dx was not yet initialized 2) the dx viewport state was mangled or 3) the dx driver is f* up.

Considering it worked on other systems, and assuming you where using the same exact code, it would have to either be #2 or #3, as #1 would fail on any system. As you said that the samples ran fine on all systems, it seems unlikely #3 is the sole cause. Leaving only the dx state and possibly slight differences in driver implementation to blame.

I am curious because although a "solution" was found, it is more of a "work around" because the underlying problem remains a mystery. Unless I have overlooked something?

[CrazyEddie]

Interesting question.

The fact is that the call can fail for whatever reason. I can't recall what the docs used to say about this, and since 8.1 is obsolete I couldn't find what I wanted on MSDN either(!).

However, it's a situation we knew could come up, and as such the CEGUI renderer constructor code for this module contains this (the catch comment is the important bit):

Code: Select all

   try
   {
      size = getViewportSize();
   }
   catch (std::exception&)
   {
      // we'll allow things to continue here, and assume that the user will
      // be calling DirectX81Renderer::setDisplaySize afterwards.
      size.d_height = size.d_width = 0.0f;
   }

Having said this, it's first time I ever saw this behaviour in the wild

CE.