Re: Texturing fails silently, objects are all white
From: Clafou (Clafou_at_discussions.microsoft.com)
Date: 08/17/04
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Date: Tue, 17 Aug 2004 09:49:02 -0700
Absolutely! 4MB doesn't leave me much space at all. I'm running at 1152x864
in 16-bit mode so multiplied by 2 to account for a back buffer, I actually
only have about 200KB of VRAM left. That pretty much concurs with the limits
I'm hitting (128x256 24 bit is OK, I even have two of those displayed at a
time). I would like where necessary to downsample, or output an error message
if the situation is just too bad, but I need to be able to detect the
problem, and I'm not sure how!
"Jack Hoxley" wrote:
> As a thought... even with the managed pool where it pages it in/out of VRAM
> as/when needed, surely it still must be in VRAM when the Draw*( ) call is
> made? With 4mb of RAM you'd struggle to fit a 24bit 1024x1024 texture in
> (3mb exactly iirc). The front/back buffers will probably knock the usable
> space down to ~2mb at a guesstimate.
>
> Thus if the image simply cannot fit in at all, then there isn't anything
> that can be done about it... Maybe the only solution then would be to
> downsample the image until it fits? or tile-it so that only a small %age of
> it needs to be in memory at each Draw*( ) call?
>
> hth
> Jack
>
>
> "Clafou" <Clafou@discussions.microsoft.com> wrote in message
> news:88358A09-840D-470B-B6BA-F964E8B4731C@microsoft.com...
> > Hi
> >
> > I am using D3DXCreateTextureFromFileEx to load textures into the managed
> > pool. These textures are big photos, and on old graphics cards with low
> > memory (4Mb of VRAM), the textures are not displayed at all and my objects
> > are all white. I imagine this is because the video memory is too low? Is
> > there a workaround?
> >
> > I would need to at least detect that texturing fails (currently, rendering
> > executes without returning any error code), so that I can try to reduce
> the
> > size of the texture or output a meaningful error message. But so far I
> > couldn't find any way to detect failure. Should I used the default pool
> > instead of the managed pool, would that help me detect a failure?
> >
> > Many thanks in advance!
> > Clafou
>
>
>
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