[Mesa-dev] [PATCH 13/23] i965: Introduce a function to emit a SAMPLER_STATE structure.

[Pohjolainen, Topi]

On Tue, Jul 29, 2014 at 04:29:18PM -0700, Kenneth Graunke wrote:
> This simply assembles all the SAMPLER_STATE fields into their proper bit
> locations.  Making it work on all generations was easy enough; some of
> the fields are even in the same place.
> 
> Not used by anything yet, but will be soon.  I made it non-static so
> BLORP can use it too.
> 
> Signed-off-by: Kenneth Graunke <kenneth at whitecape.org>

Compared to gen7_update_sampler_state() and brw_update_sampler_state(), and
couldn't spot anything missing or being added.

> ---
>  src/mesa/drivers/dri/i965/brw_sampler_state.c | 75 +++++++++++++++++++++++++++
>  src/mesa/drivers/dri/i965/brw_state.h         | 18 +++++++
>  2 files changed, 93 insertions(+)
> 
> diff --git a/src/mesa/drivers/dri/i965/brw_sampler_state.c b/src/mesa/drivers/dri/i965/brw_sampler_state.c
> index 1bc8922..c631b76 100644
> --- a/src/mesa/drivers/dri/i965/brw_sampler_state.c
> +++ b/src/mesa/drivers/dri/i965/brw_sampler_state.c
> @@ -45,6 +45,81 @@
>  #include "main/macros.h"
>  #include "main/samplerobj.h"
>  
> +/**
> + * Emit a SAMPLER_STATE structure, given all the fields.
> + */
> +void
> +brw_emit_sampler_state(struct brw_context *brw,
> +                       uint32_t *ss,
> +                       uint32_t batch_offset_for_sampler_state,
> +                       unsigned min_filter,
> +                       unsigned mag_filter,
> +                       unsigned mip_filter,
> +                       unsigned max_anisotropy,
> +                       unsigned address_rounding,
> +                       unsigned wrap_s,
> +                       unsigned wrap_t,
> +                       unsigned wrap_r,
> +                       unsigned min_lod,
> +                       unsigned max_lod,
> +                       int lod_bias,
> +                       unsigned base_level,
> +                       unsigned shadow_function,
> +                       bool non_normalized_coordinates,
> +                       uint32_t border_color_offset)
> +{
> +   ss[0] = BRW_SAMPLER_LOD_PRECLAMP_ENABLE |
> +           SET_FIELD(base_level, BRW_SAMPLER_BASE_MIPLEVEL) |
> +           SET_FIELD(mip_filter, BRW_SAMPLER_MIP_FILTER) |
> +           SET_FIELD(mag_filter, BRW_SAMPLER_MAG_FILTER) |
> +           SET_FIELD(min_filter, BRW_SAMPLER_MIN_FILTER);
> +
> +   ss[2] = border_color_offset;
> +   if (brw->gen < 6) {
> +      ss[2] += brw->batch.bo->offset64; /* reloc */
> +      drm_intel_bo_emit_reloc(brw->batch.bo,
> +                              batch_offset_for_sampler_state + 8,
> +                              brw->batch.bo, border_color_offset,
> +                              I915_GEM_DOMAIN_SAMPLER, 0);
> +   }
> +
> +   ss[3] = SET_FIELD(max_anisotropy, BRW_SAMPLER_MAX_ANISOTROPY) |
> +           SET_FIELD(address_rounding, BRW_SAMPLER_ADDRESS_ROUNDING);
> +
> +   if (brw->gen >= 7) {
> +      ss[0] |= SET_FIELD(lod_bias & 0x1fff, GEN7_SAMPLER_LOD_BIAS);
> +
> +      if (min_filter == BRW_MAPFILTER_ANISOTROPIC)
> +         ss[0] |= GEN7_SAMPLER_EWA_ANISOTROPIC_ALGORIHTM;
> +
> +      ss[1] = SET_FIELD(min_lod, GEN7_SAMPLER_MIN_LOD) |
> +              SET_FIELD(max_lod, GEN7_SAMPLER_MAX_LOD) |
> +              SET_FIELD(shadow_function, GEN7_SAMPLER_SHADOW_FUNCTION);
> +
> +      ss[3] |= SET_FIELD(wrap_s, BRW_SAMPLER_TCX_WRAP_MODE) |
> +               SET_FIELD(wrap_t, BRW_SAMPLER_TCY_WRAP_MODE) |
> +               SET_FIELD(wrap_r, BRW_SAMPLER_TCZ_WRAP_MODE);
> +
> +      if (non_normalized_coordinates)
> +         ss[3] |= GEN7_SAMPLER_NON_NORMALIZED_COORDINATES;
> +   } else {
> +      ss[0] |= SET_FIELD(lod_bias & 0x7ff, GEN4_SAMPLER_LOD_BIAS) |
> +               SET_FIELD(shadow_function, GEN4_SAMPLER_SHADOW_FUNCTION);
> +
> +      if (brw->gen == 6 && min_filter != mag_filter)
> +         ss[0] |= GEN6_SAMPLER_MIN_MAG_NOT_EQUAL;
> +
> +      ss[1] = SET_FIELD(min_lod, GEN4_SAMPLER_MIN_LOD) |
> +              SET_FIELD(max_lod, GEN4_SAMPLER_MAX_LOD) |
> +              SET_FIELD(wrap_s, BRW_SAMPLER_TCX_WRAP_MODE) |
> +              SET_FIELD(wrap_t, BRW_SAMPLER_TCY_WRAP_MODE) |
> +              SET_FIELD(wrap_r, BRW_SAMPLER_TCZ_WRAP_MODE);
> +
> +      if (brw->gen >= 6 && non_normalized_coordinates)
> +         ss[3] |= GEN6_SAMPLER_NON_NORMALIZED_COORDINATES;
> +   }
> +}
> +
>  uint32_t
>  translate_wrap_mode(struct brw_context *brw, GLenum wrap, bool using_nearest)
>  {
> diff --git a/src/mesa/drivers/dri/i965/brw_state.h b/src/mesa/drivers/dri/i965/brw_state.h
> index 0fda360..f875dba 100644
> --- a/src/mesa/drivers/dri/i965/brw_state.h
> +++ b/src/mesa/drivers/dri/i965/brw_state.h
> @@ -243,6 +243,24 @@ void gen7_upload_3dstate_so_decl_list(struct brw_context *brw,
>  void gen8_init_vtable_surface_functions(struct brw_context *brw);
>  
>  /* brw_sampler_state.c */
> +void brw_emit_sampler_state(struct brw_context *brw,
> +                            uint32_t *sampler_state,
> +                            uint32_t batch_offset_for_sampler_state,
> +                            unsigned min_filter,
> +                            unsigned mag_filter,
> +                            unsigned mip_filter,
> +                            unsigned max_anisotropy,
> +                            unsigned address_rounding,
> +                            unsigned wrap_s,
> +                            unsigned wrap_t,
> +                            unsigned wrap_r,
> +                            unsigned min_lod,
> +                            unsigned max_lod,
> +                            int lod_bias,
> +                            unsigned base_level,
> +                            unsigned shadow_function,
> +                            bool non_normalized_coordinates,
> +                            uint32_t border_color_offset);
>  uint32_t translate_wrap_mode(struct brw_context *brw,
>                               GLenum wrap, bool using_nearest);
>  void upload_default_color(struct brw_context *brw,
> -- 
> 2.0.2
> 
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