diff options
| -rw-r--r-- | src/glsl/lower_packed_varyings.cpp | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/src/glsl/lower_packed_varyings.cpp b/src/glsl/lower_packed_varyings.cpp index 8f05752ed4b..8a40f5e72e5 100644 --- a/src/glsl/lower_packed_varyings.cpp +++ b/src/glsl/lower_packed_varyings.cpp @@ -70,6 +70,10 @@ * This lowering pass also packs flat floats, ints, and uints together, by * using ivec4 as the base type of flat "varyings", and using appropriate * casts to convert floats and uints into ints. + * + * This lowering pass also handles varyings whose type is a struct or an array + * of struct. Structs are packed in order and with no gaps, so there may be a + * performance penalty due to structure elements being double-parked. */ #include "glsl_symbol_table.h" @@ -274,10 +278,20 @@ lower_packed_varyings_visitor::lower_rvalue(ir_rvalue *rvalue, ir_variable *unpacked_var, const char *name) { - /* FINISHME: Support for "varying" records in GLSL 1.50. */ - assert(!rvalue->type->is_record()); - - if (rvalue->type->is_array()) { + if (rvalue->type->is_record()) { + for (unsigned i = 0; i < rvalue->type->length; i++) { + if (i != 0) + rvalue = rvalue->clone(this->mem_ctx, NULL); + const char *field_name = rvalue->type->fields.structure[i].name; + ir_dereference_record *dereference_record = new(this->mem_ctx) + ir_dereference_record(rvalue, field_name); + char *deref_name + = ralloc_asprintf(this->mem_ctx, "%s.%s", name, field_name); + fine_location = this->lower_rvalue(dereference_record, fine_location, + unpacked_var, deref_name); + } + return fine_location; + } else if (rvalue->type->is_array()) { /* Arrays are packed/unpacked by considering each array element in * sequence. */ |