ClearTextureFilters() + alpha flag = MAV on Vista

The following code produces a Memory Access Violation with B3D v1.98 on Vista.



It only occours when you use ClearTextureFilters among with LoadTexture using the alpha flag. I was very surprised when I noticed it, since it's an extremely common situation.

I tested it with B3D 1.89 as well and it runs fine instead of crashing. It doesn't seem to affect Windows XP, since it ran fine with either versions of B3D.

I don't have other Vista PC's to test the bug with... could anyone with Vista kindly test it and post the results?


Test machine: AMD X2 5200, ATI 1950 Pro (latest Catalyst), 2gb RAM, Vista Ultimate (all updates installed, UAC disabled), DirectX 9.0c (latest distribution).

I am referring to the latest update, v1.99, not v1.98... it states the wrong version number in the IDE. :)

I have no Vista, but works fine on XP. Welcome in the new world of b3d textur issus. ;)

(Really cool, lots of problems here with textures with new drivers and cards and not "one" statement from brl.....)

It works fine indeed on XP, it seems to be a Vista only issue (at least on my machine).


This looks like the mother of all texture issues, since it only need a cleartexturefilters and an alpha texture to crash. :)

Anyway, I am wondering if this bug is present with any video card and thus it is a OS issue or not.

Confirmed, clearing textures filters and loading any texture with the ,2 flag results in meltdown. Noticed this awhile back but was hoping it was a driver issuse. 4 sets of drivers later - it still presists.

I'm curious... what chipset are you using, ati or nvidia? I don't think the bug is driver related.

Anyway, this bug MUST be solved as B3D becames quite useless without a way to clear texture filters (and it also causes havoc with a lot of already written source code), and since it didn't exist with older versions there should be a solution.

Nvidia chipset, i tested with the 7000 series and the 8000 series, same MAV.

Haven't tested on ATi though.

This is very bad news.
I hope Mark is reading this.

Do I get this right, you get the MAV as soon as you try to use a texture that was created or loaded after the ClearTextureFIlters?

If so, there may be a solution. Try it this way instead:

ClearTextureFilters()
Cursor = LoadTexture("texture.png" ,2 or 1)

Setting the flag 1 may save the day. (?) See also this thread:
http://www.blitzbasic.com/Community/posts.php?topic=71111

It may be the same probem, although in my case it was on XP.

Setting the LoadTexture to 3 (2+1) works... thanks JFK, you saved the day. :)



Hey Swampdonkey, could you test if it works on your pc too?

Weird bug, though (on the other hand it could just be a bad habit covered in the older versions, since as JFK pointed out in the other thread ClearTextureFilters removes the flag 'color').