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nir/lower_tex: generalize get_texture_size()

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This was written specifically for RECT samplers. Make it more generic so
we can call this from the gradient lowerings too.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Iago Toral Quiroga
2016-11-30 12:42:54 +01:00
parent fd249c803e
commit bac303c286
1 changed files with 10 additions and 5 deletions
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15
src/compiler/nir/nir_lower_tex.c
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@@ -154,22 +154,27 @@ get_texture_size(nir_builder *b, nir_tex_instr *tex)
{
b->cursor = nir_before_instr(&tex->instr);
/* RECT textures should not be array: */
assert(!tex->is_array);
nir_tex_instr *txs;
txs = nir_tex_instr_create(b->shader, 1);
txs->op = nir_texop_txs;
txs->sampler_dim = GLSL_SAMPLER_DIM_RECT;
txs->sampler_dim = tex->sampler_dim;
txs->is_array = tex->is_array;
txs->is_shadow = tex->is_shadow;
txs->is_new_style_shadow = tex->is_new_style_shadow;
txs->texture_index = tex->texture_index;
txs->texture = (nir_deref_var *)
nir_copy_deref(txs, &tex->texture->deref);
txs->sampler_index = tex->sampler_index;
txs->sampler = (nir_deref_var *)
nir_copy_deref(txs, &tex->sampler->deref);
txs->dest_type = nir_type_int;
/* only single src, the lod: */
txs->src[0].src = nir_src_for_ssa(nir_imm_int(b, 0));
txs->src[0].src_type = nir_tex_src_lod;
nir_ssa_dest_init(&txs->instr, &txs->dest, 2, 32, NULL);
nir_ssa_dest_init(&txs->instr, &txs->dest, tex->coord_components, 32, NULL);
nir_builder_instr_insert(b, &txs->instr);
return nir_i2f(b, &txs->dest.ssa);