Re: [Openexr-devel] half textures

[Ken McGaugh]

Simon Green wrote:
> Ken,
>
> This could be a driver bug, if you can send me a small code sample that 
> illustrates the problem I can get it fixed.

Thanks Simon.  I tried to reproduce the problm in exrdisplay to demonstrate it,
but it worked correctly.  So I went back and disabled everything in my app
which is different from exrdisplay and then slowly started to turn features
back on.  I think the problem was that glPixelStore() settings were bleeding
across multi-texture objects, so now I just explicitly reset them after each
glActiveTextureARB() call.

> As a workaround, couldn't you just create a smaller image in memory and then do 
> a normal texture download?

I could, but this happens frequently and needs to be as fast as possible.
I currently just create a texture the size of the image, but we frequently
work with 4k images and our hardware doesn't really like that too much.

> Glad to hear other people are playing around with hardware accelerated OpenEXR 
> stuff, anyway!

I wouldn't exactly call it "playing".  This app is now the backbone of our 3D
lighting pipeline.  :)

I cannot wait to get my hands on an NV40 to push this hardware accelerated exr
stuff even further.

Thanks again.
--Ken