diff options
| author | Roland Scheidegger <[email protected]> | 2013-08-21 20:35:51 +0200 |
|---|---|---|
| committer | Roland Scheidegger <[email protected]> | 2013-08-21 22:05:52 +0200 |
| commit | 275d2efeed79f135bbcc512bcf2c0607f2f25cd1 (patch) | |
| tree | d91b3b02ceb005bfd5bd5d61271e5f02d5399eaf /src/gallium | |
| parent | 21d8fa275966ed56be48648d1847c8ded92534bc (diff) | |
gallivm: add comment for bogus min/mag filter selection with nearest mip filter
Detected this hunting some other bug, not sure if it really needs fixing but
it is definitely wrong.
Reviewed-by: Jose Fonseca <[email protected]>
Diffstat (limited to 'src/gallium')
| -rw-r--r-- | src/gallium/auxiliary/gallivm/lp_bld_sample.c | 8 | ||||
| -rw-r--r-- | src/gallium/auxiliary/gallivm/lp_bld_sample_aos.c | 2 | ||||
| -rw-r--r-- | src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c | 2 |
3 files changed, 10 insertions, 2 deletions
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_sample.c b/src/gallium/auxiliary/gallivm/lp_bld_sample.c index d339abaea04..696855b1335 100644 --- a/src/gallium/auxiliary/gallivm/lp_bld_sample.c +++ b/src/gallium/auxiliary/gallivm/lp_bld_sample.c @@ -700,6 +700,14 @@ lp_build_lod_selector(struct lp_build_sample_context *bld, if (mip_filter == PIPE_TEX_MIPFILTER_NONE || mip_filter == PIPE_TEX_MIPFILTER_NEAREST) { + /* + * XXX: this is not entirely correct, as out_lod_ipart is used + * both for mip level determination as well as mag/min switchover + * point (if different min/mag filters are used). In particular, + * lod values between [-0.5,0] (rho between [sqrt(2), 1.0]) will + * incorrectly use min filter instead of mag (the non-optimized + * calculation further down has exactly the same problem). + */ *out_lod_ipart = lp_build_ilog2(levelf_bld, rho); *out_lod_fpart = levelf_bld->zero; return; diff --git a/src/gallium/auxiliary/gallivm/lp_bld_sample_aos.c b/src/gallium/auxiliary/gallivm/lp_bld_sample_aos.c index da416aab87e..2573cec2d1b 100644 --- a/src/gallium/auxiliary/gallivm/lp_bld_sample_aos.c +++ b/src/gallium/auxiliary/gallivm/lp_bld_sample_aos.c @@ -1611,7 +1611,7 @@ lp_build_sample_aos(struct lp_build_sample_context *bld, LLVMValueRef minify; /* - * XXX this should to all lods into account, if some are min + * XXX this should take all lods into account, if some are min * some max probably could hack up the coords/weights in the linear * path with selects to work for nearest. * If that's just two quads sitting next to each other it seems diff --git a/src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c b/src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c index 6d125872844..34ab414733c 100644 --- a/src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c +++ b/src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c @@ -1636,7 +1636,7 @@ lp_build_sample_general(struct lp_build_sample_context *bld, LLVMValueRef minify; /* - * XXX this should to all lods into account, if some are min + * XXX this should take all lods into account, if some are min * some max probably could hack up the coords/weights in the linear * path with selects to work for nearest. * If that's just two quads sitting next to each other it seems |