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nir: Add option to lower tex to txl when shader don't support implicit LOD

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We already add the LOD src, so go ahead and update the texop as well
when this option is set.

v2: Make it an option. (Rob Clark)

v3: Use a more concise name suggested by Jason.

Reviewed-by: Rob Clark <robdclark@gmail.com>
This commit is contained in:
Caio Marcelo de Oliveira Filho 2019-04-18 21:01:15 -07:00
parent ff642fb0e6
commit d5ac5d6e83
2 changed files with 8 additions and 0 deletions
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6
src/compiler/nir/nir.h
View file

@ -3264,6 +3264,12 @@ typedef struct nir_lower_tex_options {
*/
unsigned lower_srgb;
/**
* If true, lower nir_texop_tex on shaders that doesn't support implicit
* LODs to nir_texop_txl.
*/
bool lower_tex_without_implicit_lod;
/**
* If true, lower nir_texop_txd on cube maps with nir_texop_txl.
*/

2
src/compiler/nir/nir_lower_tex.c
View file

@ -1127,6 +1127,8 @@ nir_lower_tex_block(nir_block *block, nir_builder *b,
(tex->op == nir_texop_tex && !shader_supports_implicit_lod))) {
b->cursor = nir_before_instr(&tex->instr);
nir_tex_instr_add_src(tex, nir_tex_src_lod, nir_src_for_ssa(nir_imm_int(b, 0)));
if (tex->op == nir_texop_tex && options->lower_tex_without_implicit_lod)
tex->op = nir_texop_txl;
progress = true;
continue;
}