Re: [Mesa3d-users] alpha+texture GL question

[Brian P. <br...@va...>]

Dave Morse wrote:
> 
> Brian Paul writes:
>  > Dave Morse wrote:
>  > >
>  > > Brian Paul writes:
>  > >  > Dave Morse wrote:
>  > >  > >
>  > >  > > I'm drawing lots of GL_RGBA GL_UNSIGNED_BYTE images with glDrawPixels, and
>  > >  > > a few on texture maps.  I've got
>  > >  > >
>  > >  > >   glEnable( GL_ALPHA_TEST );
>  > >  > >   glAlphaFunc( GL_GREATER, 0.33 );
>  > >  > >
>  > >  > > set at the beginning of my program.  This does what I want for the
>  > >  > > glDrawPixel'ed images, but not the texture mapped ones.  Anyone know why,
>  > >  > > off the top of their heads?
>  > >  >
>  > >  > Can I see your glTexImage2D call?
>  > >  >
>  > >  > Which texture env mode are you using?
>  > >  >
>  > >  > Using hardware or software rendering?
>  > >
>  > > Ah, some news on this...
>  > >
>  > > Only using hardware banshee dri driver do I get the problem.  NOT with
>  > > indirect rendering.  Not with nvidia.
>  > >
>  > > My apologies for sending to the wrong mailing list!
>  > > smack smack ==> me.
>  >
>  >
>  > I know alpha testing works with the 3dfx DRI drivers and I'm
>  > pretty sure it works with the Voodoo1/2 + stand-alone Mesa combo.
>  >
>  > Again, could I see your glTexImage2D calls and what tex env modes
>  > you're using?
>  >
>  > -Brian
> 
> NB: My dri is 6 weeks old.
> 
> glBindTexture( GL_TEXTURE_2D, id );
> glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP );
> glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP );
> glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
> glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
> glTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE );
> glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA,
>               raster->w,
>               raster->h,
>               0, GL_RGBA, GL_UNSIGNED_BYTE,
>               raster->pixels );

I happened to have fixed a bug when using GL_RGBA and GL_REPLACE
yesterday in the tdfx-2-1 branch.  It would be good if you could
download that branch and test.  My test of GL_RGBA + GL_RELACE
works now but it would be nice to get verification from another
test.

-Brian