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| author | Brian Paul <brian.paul@tungstengraphics.com> | 2005-10-29 16:05:18 +0000 |
|---|---|---|
| committer | Brian Paul <brian.paul@tungstengraphics.com> | 2005-10-29 16:05:18 +0000 |
| commit | af13891dbdfd7ec46f85238f83eacaf6d1aeb2eb (patch) | |
| tree | 21348326eaf738d1ac8cb603a67fe1d13e191140 /src/mesa/swrast | |
| parent | 4174f79b1916746c826352875b27f897484885e7 (diff) | |
fix LIT bug
Diffstat (limited to 'src/mesa/swrast')
| -rw-r--r-- | src/mesa/swrast/s_nvfragprog.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/src/mesa/swrast/s_nvfragprog.c b/src/mesa/swrast/s_nvfragprog.c index 987163389a..218abedadf 100644 --- a/src/mesa/swrast/s_nvfragprog.c +++ b/src/mesa/swrast/s_nvfragprog.c @@ -821,7 +821,15 @@ execute_program( GLcontext *ctx, result[0] = 1.0F; result[1] = a[0]; /* XXX we could probably just use pow() here */ - result[2] = (a[0] > 0.0F) ? EXPF(a[3] * LOGF(a[1])) : 0.0F; + if (a[0] > 0.0F) { + if (a[1] == 0.0 && a[3] == 0.0) + result[2] = 1.0; + else + result[2] = EXPF(a[3] * LOGF(a[1])); + } + else { + result[2] = 0.0; + } result[3] = 1.0F; store_vector4( inst, machine, result ); } |