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glsl: Pack integer and double varyings as flat even if interpolation mode is none

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v2: Also update varying_matches::compute_packing_class().  Suggested by
Timothy Arceri.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=96358
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Cc: "12.0" <mesa-stable@lists.freedesktop.org>
Cc: Gregory Hainaut <gregory.hainaut@gmail.com>
Cc: Ilia Mirkin <imirkin@alum.mit.edu>
(cherry picked from commit 3119871bd9)
This commit is contained in:
Ian Romanick 2016-06-14 14:38:04 -07:00 • committed by Emil Velikov
parent bc68532a06
commit 3a35da7e8a
3 changed files with 15 additions and 6 deletions
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7
src/compiler/glsl/ir.h
View file

@ -586,6 +586,13 @@ public:
return this->u.state_slots;
}
inline bool is_interpolation_flat() const
{
return this->data.interpolation == INTERP_QUALIFIER_FLAT ||
this->type->contains_integer() ||
this->type->contains_double();
}
inline bool is_name_ralloced() const
{
return this->name != ir_variable::tmp_name;

3
src/compiler/glsl/link_varyings.cpp
View file

@ -1610,7 +1610,8 @@ varying_matches::compute_packing_class(const ir_variable *var)
unsigned packing_class = var->data.centroid | (var->data.sample << 1) |
(var->data.patch << 2);
packing_class *= 4;
packing_class += var->data.interpolation;
packing_class += var->is_interpolation_flat()
? unsigned(INTERP_QUALIFIER_FLAT) : var->data.interpolation;
return packing_class;
}

11
src/compiler/glsl/lower_packed_varyings.cpp
View file

@ -273,11 +273,11 @@ lower_packed_varyings_visitor::run(struct gl_shader *shader)
continue;
/* This lowering pass is only capable of packing floats and ints
* together when their interpolation mode is "flat". Therefore, to be
* safe, caller should ensure that integral varyings always use flat
* interpolation, even when this is not required by GLSL.
* together when their interpolation mode is "flat". Treat integers as
* being flat when the interpolation mode is none.
*/
assert(var->data.interpolation == INTERP_QUALIFIER_FLAT ||
var->data.interpolation == INTERP_QUALIFIER_NONE ||
!var->type->contains_integer());
/* Clone the variable for program resource list before
@ -607,7 +607,7 @@ lower_packed_varyings_visitor::get_packed_varying_deref(
if (this->packed_varyings[slot] == NULL) {
char *packed_name = ralloc_asprintf(this->mem_ctx, "packed:%s", name);
const glsl_type *packed_type;
if (unpacked_var->data.interpolation == INTERP_QUALIFIER_FLAT)
if (unpacked_var->is_interpolation_flat())
packed_type = glsl_type::ivec4_type;
else
packed_type = glsl_type::vec4_type;
@ -627,7 +627,8 @@ lower_packed_varyings_visitor::get_packed_varying_deref(
packed_var->data.centroid = unpacked_var->data.centroid;
packed_var->data.sample = unpacked_var->data.sample;
packed_var->data.patch = unpacked_var->data.patch;
packed_var->data.interpolation = unpacked_var->data.interpolation;
packed_var->data.interpolation = packed_type == glsl_type::ivec4_type
? unsigned(INTERP_QUALIFIER_FLAT) : unpacked_var->data.interpolation;
packed_var->data.location = location;
packed_var->data.precision = unpacked_var->data.precision;
packed_var->data.always_active_io = unpacked_var->data.always_active_io;