2 files changed, 14 insertions, 0 deletions
diff --git a/indra/llprimitive/llmaterial.cpp b/indra/llprimitive/llmaterial.cpp
index f546ac1645..0ab97a0df3 100644
--- a/indra/llprimitive/llmaterial.cpp
+++ b/indra/llprimitive/llmaterial.cpp
@@ -27,6 +27,7 @@
 #include "linden_common.h"
 
 #include "llmaterial.h"
+#include "llmd5.h"
 
 /**
  * Materials cap parameters
@@ -475,4 +476,16 @@ U32 LLMaterial::getShaderMask(U32 alpha_mode)
     return ret;
 }
 
+LLUUID LLMaterial::getHash() const
+{
+    LL_PROFILE_ZONE_SCOPED_CATEGORY_TEXTURE;
+    LLMD5 md5;
+    // HACK - hash the bytes of this LLMaterial, but trim off the S32 in LLRefCount
+    md5.update((unsigned char*)this + sizeof(S32), sizeof(this) - sizeof(S32));
+    md5.finalize();
+    LLUUID id;
+    md5.raw_digest(id.mData);
+    // *TODO: Hash the overrides
+    return id;
+}
 
diff --git a/indra/llprimitive/llmaterial.h b/indra/llprimitive/llmaterial.h
index 2f8aafc2cf..d715671ae1 100644
--- a/indra/llprimitive/llmaterial.h
+++ b/indra/llprimitive/llmaterial.h
@@ -125,6 +125,7 @@ public:
     bool        operator != (const LLMaterial& rhs) const;
 
     U32         getShaderMask(U32 alpha_mode = DIFFUSE_ALPHA_MODE_DEFAULT);
+    LLUUID      getHash() const;
 
 protected:
     LLUUID      mNormalID;