Ian Romanick wrote: > Hello all. > > I noticed that NV_texture_rectangle appeared in the R100 driver string after > then recent R200 merge. I did some looking around, and found that it is > explicitly enabled in the R200 driver and has code to support rectangular > textures. It seems that it is enabled by default in Mesa. Is this correct?
It's enabled for the R200 driver and software rendering only. > I didn't dig deep enough in Mesa to see if it would somehow automatically > convert a rectangle to a power-of-two, so this might be okay. It does not do that. The texture targets GL_TEXTURE_2D and GL_TEXTURE_RECTANGLE_NV are distinct. > In the R100 driver, we could be in one of two situations. > > 1. NV_texture_rectangle is exported, but not really supported. This is bad. > If this is the case, then extras/Mesa/src/extensions.c should be changed > to mark NV_texture_rectangle OFF by default. I'd really hate to see a > crash, incorrect rendering, or a SW fallback for a non-required extension. > > 2. Mesa automagically does some stuff to make rectangular textures work on > hardware that only supports power-of-two textures. In this case, there > could be a lot of wasted space on R100 (which does support rectangular > textures). In this case, Keith: what do I need to do to the R100 driver > to make it work? I don't want to have to just look for differences from > the R200 driver, as that is a lot of (error prone) work. :) NPOT textures are really supported in the R200. It's a feature we exposed for the Weather Channel project. Simulating NPOT textures with conventional targets could be pretty tricky. Note that NPOT texture coordinates range from [0,Width]x[0,Height], not [0,1]x[0,1] as normal textures do. Some clamp/repeat modes aren't supported either. -Brian ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf _______________________________________________ Dri-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/dri-devel
