[Mesa-dev] [PATCH] nir: passthrough-edgeflags support

[Eric Anholt]

Rob Clark <robdclark at gmail.com> writes:

> From: Rob Clark <robclark at freedesktop.org>
>
> Handled by tgsi_emulate for glsl->tgsi case.
>
> Signed-off-by: Rob Clark <robclark at freedesktop.org>
> Reviewed-by: Connor Abbott <cwabbott0 at gmail.com>
> ---
>  src/compiler/Makefile.sources                      |  1 +
>  src/compiler/nir/nir.h                             |  2 +
>  src/compiler/nir/nir_lower_passthrough_edgeflags.c | 55 ++++++++++++++++++++++
>  3 files changed, 58 insertions(+)
>  create mode 100644 src/compiler/nir/nir_lower_passthrough_edgeflags.c
>
> diff --git a/src/compiler/Makefile.sources b/src/compiler/Makefile.sources
> index b68b745..131eb5c 100644
> --- a/src/compiler/Makefile.sources
> +++ b/src/compiler/Makefile.sources
> @@ -199,6 +199,7 @@ NIR_FILES = \
>  	nir/nir_lower_indirect_derefs.c \
>  	nir/nir_lower_io.c \
>  	nir/nir_lower_outputs_to_temporaries.c \
> +	nir/nir_lower_passthrough_edgeflags.c \
>  	nir/nir_lower_phis_to_scalar.c \
>  	nir/nir_lower_returns.c \
>  	nir/nir_lower_samplers.c \
> diff --git a/src/compiler/nir/nir.h b/src/compiler/nir/nir.h
> index e169d1a..e65e1e3 100644
> --- a/src/compiler/nir/nir.h
> +++ b/src/compiler/nir/nir.h
> @@ -2278,6 +2278,8 @@ void nir_lower_two_sided_color(nir_shader *shader);
>  
>  void nir_lower_clamp_color_outputs(nir_shader *shader);
>  
> +void nir_lower_passthrough_edgeflags(nir_shader *shader);
> +
>  typedef struct nir_lower_wpos_ytransform_options {
>     int state_tokens[5];
>     bool fs_coord_origin_upper_left :1;
> diff --git a/src/compiler/nir/nir_lower_passthrough_edgeflags.c b/src/compiler/nir/nir_lower_passthrough_edgeflags.c
> new file mode 100644
> index 0000000..d2cc9e3
> --- /dev/null
> +++ b/src/compiler/nir/nir_lower_passthrough_edgeflags.c
> @@ -0,0 +1,55 @@
> +/*
> + * Copyright © 2015 Red Hat
> + *
> + * Permission is hereby granted, free of charge, to any person obtaining a
> + * copy of this software and associated documentation files (the "Software"),
> + * to deal in the Software without restriction, including without limitation
> + * the rights to use, copy, modify, merge, publish, distribute, sublicense,
> + * and/or sell copies of the Software, and to permit persons to whom the
> + * Software is furnished to do so, subject to the following conditions:
> + *
> + * The above copyright notice and this permission notice (including the next
> + * paragraph) shall be included in all copies or substantial portions of the
> + * Software.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
> + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
> + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
> + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
> + * SOFTWARE.
> + */
> +
> +#include "nir.h"
> +#include "nir_builder.h"
> +
> +static void
> +lower_impl(nir_function_impl *impl)
> +{
> +   nir_shader *shader = impl->function->shader;
> +   nir_builder b;
> +   nir_variable *in, *out;
> +   nir_ssa_def *def;
> +
> +   nir_builder_init(&b, impl);
> +   b.cursor = nir_before_cf_node(&impl->cf_node);
> +
> +   in  = nir_variable_create(shader, nir_var_shader_in,
> +                             glsl_vec4_type(), "edgeflag_in");
> +   out = nir_variable_create(shader, nir_var_shader_out,
> +                             glsl_vec4_type(), "edgeflag_out");

Looks like you lost the:

in->data.location = VERT_ATTRIB_EDGEFLAG;
out->data.location =VARYING_SLOT_EDGE;

With that fixed,
Reviewed-by: Eric Anholt <eric at anholt.net>
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