C++ (Cpp) nir_tex_instr_src_size Examples

Example #1

File: nir_validate.c Project: chemecse/mesa

static void
validate_tex_instr(nir_tex_instr *instr, validate_state *state)
{
   bool src_type_seen[nir_num_tex_src_types];
   for (unsigned i = 0; i < nir_num_tex_src_types; i++)
      src_type_seen[i] = false;

   for (unsigned i = 0; i < instr->num_srcs; i++) {
      validate_assert(state, !src_type_seen[instr->src[i].src_type]);
      src_type_seen[instr->src[i].src_type] = true;
      validate_src(&instr->src[i].src, state,
                   0, nir_tex_instr_src_size(instr, i));
   }

   if (instr->texture != NULL)
      validate_deref_var(instr, instr->texture, state);

   if (instr->sampler != NULL)
      validate_deref_var(instr, instr->sampler, state);

   validate_dest(&instr->dest, state, 0, nir_tex_instr_dest_size(instr));
}

Example #2

File: nir_lower_tex.c Project: ChristophHaag/mesa-mesa

static void
project_src(nir_builder *b, nir_tex_instr *tex)
{
   /* Find the projector in the srcs list, if present. */
   int proj_index = nir_tex_instr_src_index(tex, nir_tex_src_projector);
   if (proj_index < 0)
      return;

   b->cursor = nir_before_instr(&tex->instr);

   nir_ssa_def *inv_proj =
      nir_frcp(b, nir_ssa_for_src(b, tex->src[proj_index].src, 1));

   /* Walk through the sources projecting the arguments. */
   for (unsigned i = 0; i < tex->num_srcs; i++) {
      switch (tex->src[i].src_type) {
      case nir_tex_src_coord:
      case nir_tex_src_comparator:
         break;
      default:
         continue;
      }
      nir_ssa_def *unprojected =
         nir_ssa_for_src(b, tex->src[i].src, nir_tex_instr_src_size(tex, i));
      nir_ssa_def *projected = nir_fmul(b, unprojected, inv_proj);

      /* Array indices don't get projected, so make an new vector with the
       * coordinate's array index untouched.
       */
      if (tex->is_array && tex->src[i].src_type == nir_tex_src_coord) {
         switch (tex->coord_components) {
         case 4:
            projected = nir_vec4(b,
                                 nir_channel(b, projected, 0),
                                 nir_channel(b, projected, 1),
                                 nir_channel(b, projected, 2),
                                 nir_channel(b, unprojected, 3));
            break;
         case 3:
            projected = nir_vec3(b,
                                 nir_channel(b, projected, 0),
                                 nir_channel(b, projected, 1),
                                 nir_channel(b, unprojected, 2));
            break;
         case 2:
            projected = nir_vec2(b,
                                 nir_channel(b, projected, 0),
                                 nir_channel(b, unprojected, 1));
            break;
         default:
            unreachable("bad texture coord count for array");
            break;
         }
      }

      nir_instr_rewrite_src(&tex->instr,
                            &tex->src[i].src,
                            nir_src_for_ssa(projected));
   }

   nir_tex_instr_remove_src(tex, proj_index);
}