On Thu, 13 Oct 2011 11:34:34 +0800, Yuanhan Liu <yuanhan....@linux.intel.com> wrote: > The patch(based on the reading of the emulator) came from while I was > trying to fix the oglc pbo texImage.1PBODefaults fail. This case > generates a texture with the width and height equal to window's width > and height respectively, then try to texture it on the whole window. > So, it's exactly one texel for one pixel. And, the min filter and mag > filter are GL_LINEAR. It runs with swrast OK, as expected. But it failed > with i965 driver. > > Well, you can't tell the difference from the screen, as the error is > quite tiny. From my digging, it seems that there are some tiny error > happened while getting tex address. This will break the one texel for > one pixel rule in this case. Thus the linear result is taken, with tiny > error. > > This patch would fix several oglc pbo subcase fail on both ILK, SNB and > IVB.
I would really like to see a piglit test for 1:1 linear-filtered texturing being precise, like apparently you found in oglconform. It's important to compositor developers.
pgpmlUID6Fui3.pgp
Description: PGP signature
_______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
