I'm trying to write a game in c# using managed direct3d, and I have a bit
of a situation. I'm using sprites to draw my 2d graphics, and I'm
generating some of my sprites dynamically by writing to Bitmaps, then
saving the Bitmaps to a MemoryStream that I load as a texture using
Device.FromStream.

My problem is that using this method seems to cause a memory leak over
repeated calls to FromStream. It looks to me like when I call FromStream,
Direct3D keeps a reference to my stream so it doesn't get GC'd.

I've tried re-using the same MemoryStream and setting the Position to 0
each time, and I've tried using a new MemoryStream each time.

I'm using a somewhat old version of DX9, so maybe (hopefully?) it's fixed
now, but I wanted to know if anyone could give any advice or tell me if
this was a known issue.

Thanks!

Dispose of each object when your done using it. This is what the ability to explicitly release managed resources is for.

stream.Dispose();

If you are already disposing of the objects, does disposing the device, or whatever has the reference to your stream, actually free
up the memory while the application is still running?

--
Dave Sexton
dave@www..jwaonline..com
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"Big D" <(E-Mail Removed)> wrote in message news:Xns96DE62975BF84supagoatatverizonDne@216.196.97.142...
> I'm trying to write a game in c# using managed direct3d, and I have a bit
> of a situation. I'm using sprites to draw my 2d graphics, and I'm
> generating some of my sprites dynamically by writing to Bitmaps, then
> saving the Bitmaps to a MemoryStream that I load as a texture using
> Device.FromStream.
>
> My problem is that using this method seems to cause a memory leak over
> repeated calls to FromStream. It looks to me like when I call FromStream,
> Direct3D keeps a reference to my stream so it doesn't get GC'd.
>
> I've tried re-using the same MemoryStream and setting the Position to 0
> each time, and I've tried using a new MemoryStream each time.
>
> I'm using a somewhat old version of DX9, so maybe (hopefully?) it's fixed
> now, but I wanted to know if anyone could give any advice or tell me if
> this was a known issue.
>
> Thanks!

I did some more digging and discovered that it was a directx9 bug. I
updated my dx runtime and the problem was fixed!

I should, as someone else mentioned in a workaround, learn to draw directly
to textures instead of drawing on bitmaps then converting them to textures.

"Dave" <NOSPAM-(E-Mail Removed)> wrote in
news:(E-Mail Removed):

> Dispose of each object when your done using it. This is what the
> ability to explicitly release managed resources is for.
>
> stream.Dispose();
>
> If you are already disposing of the objects, does disposing the
> device, or whatever has the reference to your stream, actually free
> up the memory while the application is still running?
>