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iris: big old hack for tex-miplevel-selection

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copied from ilo.  I don't understand this at all..
This commit is contained in:
Kenneth Graunke 2018-08-23 01:49:49 -07:00
parent e4d22b16c8
commit b2a5e1ebb3
1 changed files with 12 additions and 2 deletions
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14
src/gallium/drivers/iris/iris_state.c
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@ -1081,6 +1081,16 @@ iris_create_sampler_state(struct pipe_context *ctx,
wrap_mode_needs_border_color(wrap_t) ||
wrap_mode_needs_border_color(wrap_r);
float min_lod = state->min_lod;
unsigned mag_img_filter = state->mag_img_filter;
// XXX: explain this code ported from ilo...I don't get it at all...
if (state->min_mip_filter == PIPE_TEX_MIPFILTER_NONE &&
state->min_lod > 0.0f) {
min_lod = 0.0f;
mag_img_filter = state->min_img_filter;
}
iris_pack_state(GENX(SAMPLER_STATE), cso->sampler_state, samp) {
samp.TCXAddressControlMode = wrap_s;
samp.TCYAddressControlMode = wrap_t;
@ -1088,7 +1098,7 @@ iris_create_sampler_state(struct pipe_context *ctx,
samp.CubeSurfaceControlMode = state->seamless_cube_map;
samp.NonnormalizedCoordinateEnable = !state->normalized_coords;
samp.MinModeFilter = state->min_img_filter;
samp.MagModeFilter = state->mag_img_filter;
samp.MagModeFilter = mag_img_filter;
samp.MipModeFilter = translate_mip_filter(state->min_mip_filter);
samp.MaximumAnisotropy = RATIO21;
@ -1124,7 +1134,7 @@ iris_create_sampler_state(struct pipe_context *ctx,
const float hw_max_lod = GEN_GEN >= 7 ? 14 : 13;
samp.LODPreClampMode = CLAMP_MODE_OGL;
samp.MinLOD = CLAMP(state->min_lod, 0, hw_max_lod);
samp.MinLOD = CLAMP(min_lod, 0, hw_max_lod);
samp.MaxLOD = CLAMP(state->max_lod, 0, hw_max_lod);
samp.TextureLODBias = CLAMP(state->lod_bias, -16, 15);