diff options
| -rw-r--r-- | src/mesa/state_tracker/st_atom_sampler.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/mesa/state_tracker/st_atom_sampler.c b/src/mesa/state_tracker/st_atom_sampler.c index 4568630fd2c..daf98c3abb0 100644 --- a/src/mesa/state_tracker/st_atom_sampler.c +++ b/src/mesa/state_tracker/st_atom_sampler.c @@ -159,6 +159,12 @@ convert_sampler(struct st_context *st, sampler->normalized_coords = 1; sampler->lod_bias = ctx->Texture.Unit[texUnit].LodBias + msamp->LodBias; + /* Reduce the number of states by allowing only the values that AMD GCN + * can represent. Apps use lod_bias for smooth transitions to bigger mipmap + * levels. + */ + sampler->lod_bias = CLAMP(sampler->lod_bias, -16, 16); + sampler->lod_bias = floorf(sampler->lod_bias * 256) / 256; sampler->min_lod = MAX2(msamp->MinLod, 0.0f); sampler->max_lod = msamp->MaxLod; |