glsl: add offset to glsl interface type

In this patch we also copy the offset value from the ast and
implement offset linking rules by adding it to the record_compare()
function.

From Section 4.4.5 (Uniform and Shader Storage Block Layout Qualifiers)
of the GLSL 4.50 spec:

   "Two blocks linked together in the same program with the same block
   name must have the exact same set of members qualified with
   offset and their integral-constant-expression values must be the
   same, or a link-time error results."

Reviewed-by: Edward O'Callaghan <[email protected]>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/compiler/glsl/builtin_variables.cpp b/src/compiler/glsl/builtin_variables.cpp
index d20fc4a816c..4e2de37fbba 100644
--- a/src/compiler/glsl/builtin_variables.cpp
+++ b/src/compiler/glsl/builtin_variables.cpp
@@ -323,6 +323,7 @@ per_vertex_accumulator::add_field(int slot, const glsl_type *type,
    this->fields[this->num_fields].name = name;
    this->fields[this->num_fields].matrix_layout = GLSL_MATRIX_LAYOUT_INHERITED;
    this->fields[this->num_fields].location = slot;
+   this->fields[this->num_fields].offset = -1;
    this->fields[this->num_fields].interpolation = INTERP_QUALIFIER_NONE;
    this->fields[this->num_fields].centroid = 0;
    this->fields[this->num_fields].sample = 0;