From: Nicolai Hähnle <nicolai.haeh...@amd.com>
This fixes a bug with nearest ("point") mip selection when the fractional
part of max_lod is in (0.5,1). In this case, the spec mandates that
we still select the mip level ceil(max_lod) in the clamping case. However,
MIP_POINT_PRECLAMP will clamp before the mip selection, which is wrong.
Supposedly this setting was originally copied from the closed Vulkan
driver, but as far as I can tell, closed Vulkan was actually changed back
recently :)
Fixes dEQP-GLES3.functional.texture.mipmap.2d.max_lod.{nearest,linear}_nearest
Fixes: f7420ef5b464 ("radeonsi: enable some sampler fields to match the closed
driver")
---
src/gallium/drivers/radeonsi/si_state.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/gallium/drivers/radeonsi/si_state.c
b/src/gallium/drivers/radeonsi/si_state.c
index 96f9e444977..3135566cd63 100644
--- a/src/gallium/drivers/radeonsi/si_state.c
+++ b/src/gallium/drivers/radeonsi/si_state.c
@@ -3984,21 +3984,21 @@ static void *si_create_sampler_state(struct
pipe_context *ctx,
S_008F30_ANISO_BIAS(max_aniso_ratio) |
S_008F30_DISABLE_CUBE_WRAP(!state->seamless_cube_map)
|
S_008F30_COMPAT_MODE(sctx->b.chip_class >= VI));
rstate->val[1] = (S_008F34_MIN_LOD(S_FIXED(CLAMP(state->min_lod, 0,
15), 8)) |
S_008F34_MAX_LOD(S_FIXED(CLAMP(state->max_lod, 0,
15), 8)) |
S_008F34_PERF_MIP(max_aniso_ratio ? max_aniso_ratio +
6 : 0));
rstate->val[2] = (S_008F38_LOD_BIAS(S_FIXED(CLAMP(state->lod_bias, -16,
16), 8)) |
S_008F38_XY_MAG_FILTER(eg_tex_filter(state->mag_img_filter, max_aniso)) |
S_008F38_XY_MIN_FILTER(eg_tex_filter(state->min_img_filter, max_aniso)) |
S_008F38_MIP_FILTER(si_tex_mipfilter(state->min_mip_filter)) |
- S_008F38_MIP_POINT_PRECLAMP(1) |
+ S_008F38_MIP_POINT_PRECLAMP(0) |
S_008F38_DISABLE_LSB_CEIL(sctx->b.chip_class <= VI) |
S_008F38_FILTER_PREC_FIX(1) |
S_008F38_ANISO_OVERRIDE(sctx->b.chip_class >= VI));
rstate->val[3] = S_008F3C_BORDER_COLOR_PTR(border_color_index) |
S_008F3C_BORDER_COLOR_TYPE(border_color_type);
return rstate;
}
static void si_set_sample_mask(struct pipe_context *ctx, unsigned sample_mask)
{
--
2.11.0
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