1 files changed, 9 insertions, 0 deletions
diff --git a/indra/llprimitive/llmaterial.cpp b/indra/llprimitive/llmaterial.cpp
index fa22145972..0d146de949 100644
--- a/indra/llprimitive/llmaterial.cpp
+++ b/indra/llprimitive/llmaterial.cpp
@@ -27,6 +27,7 @@
 #include "linden_common.h"
 
 #include "llmaterial.h"
+#include "hbxxh.h"
 
 /**
  * Materials cap parameters
@@ -464,4 +465,12 @@ U32 LLMaterial::getShaderMask(U32 alpha_mode, BOOL is_alpha)
     return ret;
 }
 
+LLUUID LLMaterial::getHash() const
+{
+    LL_PROFILE_ZONE_SCOPED_CATEGORY_TEXTURE;
+    // HACK - hash the bytes of this LLMaterial, but trim off the S32 in LLRefCount
+    LLUUID id;
+    HBXXH128::digest(id, (unsigned char*)this + sizeof(LLRefCount), sizeof(*this) - sizeof(LLRefCount));
+    return id;
+}