Zack Rusin <[email protected]> writes: > On Sunday 14 June 2009 20:29:47 tom fogal wrote: > > My application was failing because we were creating floating > > point textures. We would get an INVALID_VALUE by specifying a > > ARB_texture_float internal format for glTexImage2D. > > > > The attached two-line diff enables the extension, and my app gets by > > the Mesa check that was failing (dunno about farther; need to run). It > > seems like the extension is implemented but disabled for some reason, > > though I'm basing that on a cursory look through the code and could be > > wrong. > > > > I haven't tried ATI_texture_float yet, but I'm worried that I don't see > > it in `extensions.c'. > > > > Could anyone comment on any issue[s] with ARB_float_texture in Mesa? > > This is likely the most commonly asked question on this list. In > short look at the "IP Status" section of ARB_texture_float.
For reference, the patent is online: http://www.freepatentsonline.com/6650327.html Anyway, yeah, I did notice that, but since the extension is 5 years old now I had figured I missed a point when it was labelled unenforceable. I mentioned the patent to a colleague at lunch, who recommended we patent multidimensional arrays. I guess I should take this to mean SGI hasn't relinquished their stake here. Has anybody contacted this `Doug Crisman' mentioned in the spec? > If you'd like more details there are numerous discussions related to > it in the archives. I only found: http://www.nabble.com/Floating-point-texture-support-(enabling-GPGPU-applications)-td21516913.html http://www.nabble.com/ARB_texture_float--td13515437.html There's an unverified indication that one can get an FP texture by talking directly to a driver instead of through extensions. Is there a path by which one can do this? I guess, in short, what is an application supposed to do if it wants floating point textures while supporting a range of OpenGL implementations? -tom ------------------------------------------------------------------------------ Crystal Reports - New Free Runtime and 30 Day Trial Check out the new simplified licensing option that enables unlimited royalty-free distribution of the report engine for externally facing server and web deployment. http://p.sf.net/sfu/businessobjects _______________________________________________ Mesa3d-dev mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/mesa3d-dev
