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prog_to_nir: fix write from vps to FOG

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for fragment programs we already treat fog as a single component value,
but for vp we didn't.

Fixes fog related piglit tests with my out of tree Nouveau nir patches.

Signed-off-by: Karol Herbst <kherbst@redhat.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Karol Herbst 2019-02-26 11:58:11 +01:00 • committed by Kenneth Graunke
parent bca28deb46
commit 8a8742d327
1 changed files with 7 additions and 1 deletions
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8
src/mesa/program/prog_to_nir.c
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@ -867,6 +867,11 @@ ptn_add_output_stores(struct ptn_compile *c)
*/
src = nir_channel(b, src, 2);
}
if (c->prog->Target == GL_VERTEX_PROGRAM_ARB &&
var->data.location == VARYING_SLOT_FOGC) {
/* result.fogcoord is a single component value */
src = nir_channel(b, src, 0);
}
unsigned num_components = glsl_get_vector_elements(var->type);
nir_store_var(b, var, src, (1 << num_components) - 1);
}
@ -950,7 +955,8 @@ setup_registers_and_variables(struct ptn_compile *c)
reg->num_components = 4;
nir_variable *var = rzalloc(shader, nir_variable);
if (c->prog->Target == GL_FRAGMENT_PROGRAM_ARB && i == FRAG_RESULT_DEPTH)
if ((c->prog->Target == GL_FRAGMENT_PROGRAM_ARB && i == FRAG_RESULT_DEPTH) ||
(c->prog->Target == GL_VERTEX_PROGRAM_ARB && i == VARYING_SLOT_FOGC))
var->type = glsl_float_type();
else
var->type = glsl_vec4_type();