On Sun, Jan 25, 2009 at 10:58 AM, Jimmy Rentz <[email protected]> wrote: > Hello, > I was playing around with the OpenGlSuperBible samples and > noticed some odd issues around textures. Yes, I know it won't > be perfect right now (and not supported)...I am just curious > if you see the same issues. > Well, I am seeing some issues around swizzled textures with the > sphereworld sample (chapter 08). The problems don't occur once > I force the textures to be linear. > NOTE: I modified the sample a bit so it only draws the ground. > pics: > swizzle.png - Current result with swizzled textures. > linear.png - Mod that turns off swizzled textures. > > I read something in the backlog about how mipmaps aren't > handled entirely correctly, but I don't know if this is related. > > Another thing, I do see some drm irq errors when the 1x1 mipmap > is generated. It might be related: > [drm] PGRAPH_ERROR - nSource: DATA_ERROR, nStatus: BAD_ARGUMENT > [drm] PGRAPH_ERROR - Ch 2/4 Class 0x309e Mthd 0x0300 Data > 0x00000000:0x0000000a [drm] PGRAPH_ERROR - nSource: DATA_ERROR, > nStatus: BAD_ARGUMENT [drm] PGRAPH_ERROR - Ch 2/5 Class 0x3089 > Mthd 0x0400 Data 0x00000000:0x00010001 > > 0x300 is for the texture format(A8R8G8B8) and 0x400 is for the > size (1x1). For some reason the hw doesn't like 1x1 swizzled > textures?
Yeah I know what this is about. Swizzling is broken for mip maps. The first few levels swizzle fine, but after that something screws up. I think the swizzler has some limitations for the dest surface. dest must be aligned to some boundary (64 bytes? 128?) i think, so that means each mip level must be aligned, and we probably aren't obeying that at the moment. probably the hw won't handle 1xN or Nx1 either. Try the progs/tests/mipmap_view, IIRC 8x8 and below is broken. _______________________________________________ Nouveau mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/nouveau
