[Bug 25871] nearest neighbour samples wrong texel (precision/rounding problem)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=25871

--- Comment #7 from Andreas Boll <andreas.boll.dev at gmail.com> 2012-09-11 17:12:41 UTC ---
Created attachment 66984
  --> https://bugs.freedesktop.org/attachment.cgi?id=66984
captured shader

I have tested your modified fp-tri-c from attachment 32446
with r600g on my rv770 .
I got the following output with mesa git master
e81ee67b51651e99e7e8e52c1ccafc66835d57cd
and mesa 8.0.4:

$ ./fp-tri -fps foo2.arb
!!ARBfp1.0

TEX result.color, 0.498046860099, texture[0], 2D;

END

GL_RENDERER = Gallium 0.4 on AMD RV770
glGetError = 0x0
12850 frames in 5.0 seconds = 2570.000 FPS

Additionally I have attached a screen shot from the shader.

What is the expected behavior?

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