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tgsi_to_nir: Improve interpolation modes. 

This patch extracts the interpolation mode translation
into a separate function called ttn_translate_interp_mode,
adds support for TGSI_INTERPOLATE_COLOR which was missing,
and also sets the proper interpolation mode to output
variables, which were not set previously.

Signed-Off-By: Timur Kristóf <timur.kristof@gmail.com>
Tested-by: Andre Heider <a.heider@gmail.com>
Tested-by: Rob Clark <robdclark@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Timur Kristóf 2019-02-19 10:11:36 +01:00 committed by Eric Anholt
parent 2fb800fd1d
commit 770faf546d
1 changed files with 21 additions and 15 deletions
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36
src/gallium/auxiliary/nir/tgsi_to_nir.c
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@ -180,6 +180,23 @@ ttn_src_for_dest(nir_builder *b, nir_alu_dest *dest)
return nir_fmov_alu(b, src, 4);
}
static enum glsl_interp_mode
ttn_translate_interp_mode(unsigned tgsi_interp)
{
switch (tgsi_interp) {
case TGSI_INTERPOLATE_CONSTANT:
return INTERP_MODE_FLAT;
case TGSI_INTERPOLATE_LINEAR:
return INTERP_MODE_NOPERSPECTIVE;
case TGSI_INTERPOLATE_PERSPECTIVE:
return INTERP_MODE_SMOOTH;
case TGSI_INTERPOLATE_COLOR:
return INTERP_MODE_SMOOTH;
default:
unreachable("bad TGSI interpolation mode");
}
}
static void
ttn_emit_declaration(struct ttn_compile *c)
{
@ -314,21 +331,8 @@ ttn_emit_declaration(struct ttn_compile *c)
var->data.location = VERT_ATTRIB_GENERIC0 + idx;
}
var->data.index = 0;
/* We definitely need to translate the interpolation field, because
* nir_print will decode it.
*/
switch (decl->Interp.Interpolate) {
case TGSI_INTERPOLATE_CONSTANT:
var->data.interpolation = INTERP_MODE_FLAT;
break;
case TGSI_INTERPOLATE_LINEAR:
var->data.interpolation = INTERP_MODE_NOPERSPECTIVE;
break;
case TGSI_INTERPOLATE_PERSPECTIVE:
var->data.interpolation = INTERP_MODE_SMOOTH;
break;
}
var->data.interpolation =
ttn_translate_interp_mode(decl->Interp.Interpolate);
exec_list_push_tail(&b->shader->inputs, &var->node);
c->inputs[idx] = var;
@ -352,6 +356,8 @@ ttn_emit_declaration(struct ttn_compile *c)
var->data.mode = nir_var_shader_out;
var->name = ralloc_asprintf(var, "out_%d", idx);
var->data.index = 0;
var->data.interpolation =
ttn_translate_interp_mode(decl->Interp.Interpolate);
if (c->scan->processor == PIPE_SHADER_FRAGMENT) {
switch (semantic_name) {