[Mesa-dev] [PATCH 02/11] glsl: add get_internal_ifc_packing() type helper

[Timothy Arceri]

This is used to avoid code duplication when selecting the
packing type for shared and packed layouts.
---
 src/compiler/glsl_types.h | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/src/compiler/glsl_types.h b/src/compiler/glsl_types.h
index f67465e6c8..3c18f6cce5 100644
--- a/src/compiler/glsl_types.h
+++ b/src/compiler/glsl_types.h
@@ -810,20 +810,41 @@ struct glsl_type {
 
    /**
     * Get the type interface packing.
     */
    enum glsl_interface_packing get_interface_packing() const
    {
       return (enum glsl_interface_packing)interface_packing;
    }
 
    /**
+    * Get the type interface packing used internally. For shared and packing
+    * layouts this is implementation defined.
+    */
+   enum glsl_interface_packing get_internal_ifc_packing(bool std430_supported) 
const
+   {
+      enum glsl_interface_packing packing = this->get_interface_packing();
+      if (packing == GLSL_INTERFACE_PACKING_STD140 ||
+          (!std430_supported &&
+           (packing == GLSL_INTERFACE_PACKING_SHARED ||
+            packing == GLSL_INTERFACE_PACKING_PACKED))) {
+         return GLSL_INTERFACE_PACKING_STD140;
+      } else {
+         assert(packing == GLSL_INTERFACE_PACKING_STD430 ||
+                (std430_supported &&
+                 (packing == GLSL_INTERFACE_PACKING_SHARED ||
+                  packing == GLSL_INTERFACE_PACKING_PACKED)));
+         return GLSL_INTERFACE_PACKING_STD430;
+      }
+   }
+
+   /**
     * Check if the type interface is row major
     */
    bool get_interface_row_major() const
    {
       return (bool) interface_row_major;
    }
 
 private:
 
    static mtx_t mem_mutex;
-- 
2.13.4

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