diff options
| author | Roland Scheidegger <[email protected]> | 2013-08-03 00:24:29 +0200 |
|---|---|---|
| committer | Roland Scheidegger <[email protected]> | 2013-08-08 18:55:57 +0200 |
| commit | 2d9fea95e8627e7524bc4263bc6f9067fcf4db5e (patch) | |
| tree | 8cdacdb0d94718dce3d9a867b19fcc4e8a1605e4 /src | |
| parent | f9a4288bd282dfab97a40fc6dc9c046812e7d681 (diff) | |
gallivm: fix comment wrt srgb accuracy.
I think it's actually not good enough now...
Diffstat (limited to 'src')
| -rw-r--r-- | src/gallium/auxiliary/gallivm/lp_bld_format_srgb.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_format_srgb.c b/src/gallium/auxiliary/gallivm/lp_bld_format_srgb.c index 848d6f8121b..2b1fe643849 100644 --- a/src/gallium/auxiliary/gallivm/lp_bld_format_srgb.c +++ b/src/gallium/auxiliary/gallivm/lp_bld_format_srgb.c @@ -242,8 +242,10 @@ lp_build_linear_to_srgb(struct gallivm_state *gallivm, * error metric if you'd want to tweak them, they also MUST fit with * the crappy polynomial above for srgb->linear since it is required * that each srgb value maps back to the same value). - * This function has an error of max +-0.17 (and we'd only require +-0.6), - * for the approximated srgb->linear values the error is naturally larger + * This function has an error of max +-0.17. Not sure this is actually + * enough, we require +-0.6 but that may include the +-0.5 from integer + * conversion. Seems to pass all relevant tests though... + * For the approximated srgb->linear values the error is naturally larger * (+-0.42) but still accurate enough (required +-0.5 essentially). * All in all (including min/max clamp, conversion) 15 instructions. * FMA would help (minus 2 instructions). |