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st/mesa: also clamp and quantize per-unit lod bias

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Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
This commit is contained in:
Marek Olšák
2017-07-25 17:33:05 +02:00
parent 914f11e75b
commit 033b4e4340
3 changed files with 6 additions and 4 deletions
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7
src/mesa/state_tracker/st_atom_sampler.c
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@@ -105,6 +105,7 @@ void
st_convert_sampler(const struct st_context *st,
const struct gl_texture_object *texobj,
const struct gl_sampler_object *msamp,
float tex_unit_lod_bias,
struct pipe_sampler_state *sampler)
{
memset(sampler, 0, sizeof(*sampler));
@@ -119,7 +120,7 @@ st_convert_sampler(const struct st_context *st,
if (texobj->Target != GL_TEXTURE_RECTANGLE_ARB)
sampler->normalized_coords = 1;
sampler->lod_bias = msamp->LodBias;
sampler->lod_bias = msamp->LodBias + tex_unit_lod_bias;
/* 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.
@@ -241,9 +242,9 @@ st_convert_sampler_from_unit(const struct st_context *st,
msamp = _mesa_get_samplerobj(ctx, texUnit);
st_convert_sampler(st, texobj, msamp, sampler);
st_convert_sampler(st, texobj, msamp, ctx->Texture.Unit[texUnit].LodBias,
sampler);
sampler->lod_bias += ctx->Texture.Unit[texUnit].LodBias;
sampler->seamless_cube_map |= ctx->Texture.CubeMapSeamless;
}