diff options
Diffstat (limited to 'src/glsl/link_varyings.cpp')
| -rw-r--r-- | src/glsl/link_varyings.cpp | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/glsl/link_varyings.cpp b/src/glsl/link_varyings.cpp index 04c9fdd7cc6..431d8fd7775 100644 --- a/src/glsl/link_varyings.cpp +++ b/src/glsl/link_varyings.cpp @@ -656,6 +656,10 @@ varying_matches::~varying_matches() * If \c producer_var has already been paired up with a consumer_var, or * producer_var is part of fixed pipeline functionality (and hence already has * a location assigned), this function has no effect. + * + * Note: as a side effect this function may change the interpolation type of + * \c producer_var, but only when the change couldn't possibly affect + * rendering. */ void varying_matches::record(ir_variable *producer_var, ir_variable *consumer_var) @@ -668,6 +672,21 @@ varying_matches::record(ir_variable *producer_var, ir_variable *consumer_var) return; } + if (consumer_var == NULL) { + /* Since there is no consumer_var, the interpolation type of this + * varying cannot possibly affect rendering. Also, since the GL spec + * only requires integer varyings to be "flat" when they are fragment + * shader inputs, it is possible that this variable is non-flat and is + * (or contains) an integer. + * + * lower_packed_varyings requires all integer varyings to flat, + * regardless of where they appear. We can trivially satisfy that + * requirement by changing the interpolation type to flat here. + */ + producer_var->centroid = false; + producer_var->interpolation = INTERP_QUALIFIER_FLAT; + } + if (this->num_matches == this->matches_capacity) { this->matches_capacity *= 2; this->matches = (match *) |