[Mesa-dev] [PATCH] nir: copy front interpolation when creating fake back color input

[Andres Gomez]

Ilia, would we want this patch in -stable ?

On Fri, 2017-07-07 at 20:34 -0400, Ilia Mirkin wrote:
> Fixes a bunch of gl_BackColor interpolation tests that had explicit
> interpolation specified on the fragment shader gl_Color.
> 
> Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
> ---
>  src/compiler/nir/nir_lower_two_sided_color.c | 8 ++++++--
>  1 file changed, 6 insertions(+), 2 deletions(-)
> 
> diff --git a/src/compiler/nir/nir_lower_two_sided_color.c b/src/compiler/nir/nir_lower_two_sided_color.c
> index 7d1a3bd236d..90da1013ec8 100644
> --- a/src/compiler/nir/nir_lower_two_sided_color.c
> +++ b/src/compiler/nir/nir_lower_two_sided_color.c
> @@ -46,7 +46,8 @@ typedef struct {
>   */
>  
>  static nir_variable *
> -create_input(nir_shader *shader, unsigned drvloc, gl_varying_slot slot)
> +create_input(nir_shader *shader, unsigned drvloc, gl_varying_slot slot,
> +             enum glsl_interp_mode interpolation)
>  {
>     nir_variable *var = rzalloc(shader, nir_variable);
>  
> @@ -56,6 +57,7 @@ create_input(nir_shader *shader, unsigned drvloc, gl_varying_slot slot)
>     var->name = ralloc_asprintf(var, "in_%d", drvloc);
>     var->data.index = 0;
>     var->data.location = slot;
> +   var->data.interpolation = interpolation;
>  
>     exec_list_push_tail(&shader->inputs, &var->node);
>  
> @@ -116,7 +118,9 @@ setup_inputs(lower_2side_state *state)
>        else
>           slot = VARYING_SLOT_BFC1;
>  
> -      state->colors[i].back = create_input(state->shader, ++maxloc, slot);
> +      state->colors[i].back = create_input(
> +            state->shader, ++maxloc, slot,
> +            state->colors[i].front->data.interpolation);
>     }
>  
>     return 0;
-- 
Br,

Andres