This will be used in the following patches to determine if we
support packing the components of a varying.
---
src/compiler/nir/nir_linking_helpers.c | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/src/compiler/nir/nir_linking_helpers.c
b/src/compiler/nir/nir_linking_helpers.c
index 845aba5c87..c26582ddec 100644
--- a/src/compiler/nir/nir_linking_helpers.c
+++ b/src/compiler/nir/nir_linking_helpers.c
@@ -224,6 +224,29 @@ get_interp_loc(nir_variable *var)
return INTERPOLATE_LOC_CENTER;
}
+static bool
+is_packing_supported_for_type(const struct glsl_type *type)
+{
+ /* Skip types that require more complex packing handling.
+ * TODO: add support for these types?
+ */
+ if (glsl_type_is_array(type) ||
+ glsl_type_is_dual_slot(type) ||
+ glsl_type_is_matrix(type) ||
+ glsl_type_is_struct(type) ||
+ glsl_type_is_64bit(type))
+ return false;
+
+ /* We ignore complex types above and all other vector types should
+ * have been split into scalar variables by the lower_io_to_scalar
+ * pass. The only exeption should by OpenGL xfb varyings.
+ */
+ if (glsl_get_vector_elements(type) != 1)
+ return false;
+
+ return true;
+}
+
static void
get_slot_component_masks_and_interp_types(struct exec_list *var_list,
uint8_t *comps,
--
2.19.2
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