diff --git a/libs/rs/RenderScript.h b/libs/rs/RenderScript.h
index 3406287..7902b9a 100644
--- a/libs/rs/RenderScript.h
+++ b/libs/rs/RenderScript.h
@@ -91,7 +91,11 @@
     RS_TYPE_UNSIGNED_5_5_5_1,
     RS_TYPE_UNSIGNED_4_4_4_4,
 
-    RS_TYPE_ELEMENT,
+    RS_TYPE_MATRIX_4X4,
+    RS_TYPE_MATRIX_3X3,
+    RS_TYPE_MATRIX_2X2,
+
+    RS_TYPE_ELEMENT = 1000,
     RS_TYPE_TYPE,
     RS_TYPE_ALLOCATION,
     RS_TYPE_SAMPLER,
@@ -100,7 +104,7 @@
     RS_TYPE_PROGRAM_FRAGMENT,
     RS_TYPE_PROGRAM_VERTEX,
     RS_TYPE_PROGRAM_RASTER,
-    RS_TYPE_PROGRAM_STORE
+    RS_TYPE_PROGRAM_STORE,
 };
 
 enum RsDataKind {
diff --git a/libs/rs/java/ModelViewer/src/com/android/modelviewer/SgTransform.java b/libs/rs/java/ModelViewer/src/com/android/modelviewer/SgTransform.java
index bfc9bb7..e70e811 100644
--- a/libs/rs/java/ModelViewer/src/com/android/modelviewer/SgTransform.java
+++ b/libs/rs/java/ModelViewer/src/com/android/modelviewer/SgTransform.java
@@ -82,15 +82,8 @@
 
     void setData() {
 
-        mTransformData.globalMat_Row0 = new Float4(1, 0, 0, 0);
-        mTransformData.globalMat_Row1 = new Float4(0, 1, 0, 0);
-        mTransformData.globalMat_Row2 = new Float4(0, 0, 1, 0);
-        mTransformData.globalMat_Row3 = new Float4(0, 0, 0, 1);
-
-        mTransformData.localMat_Row0 = new Float4(1, 0, 0, 0);
-        mTransformData.localMat_Row1 = new Float4(0, 1, 0, 0);
-        mTransformData.localMat_Row2 = new Float4(0, 0, 1, 0);
-        mTransformData.localMat_Row3 = new Float4(0, 0, 0, 1);
+        mTransformData.globalMat = new Matrix4f();
+        mTransformData.localMat = new Matrix4f();
 
         mTransformData.transforms0 = mTransforms[0];
         mTransformData.transforms1 = mTransforms[1];
diff --git a/libs/rs/java/ModelViewer/src/com/android/modelviewer/scenegraph.rs b/libs/rs/java/ModelViewer/src/com/android/modelviewer/scenegraph.rs
index 8053306..c794438 100644
--- a/libs/rs/java/ModelViewer/src/com/android/modelviewer/scenegraph.rs
+++ b/libs/rs/java/ModelViewer/src/com/android/modelviewer/scenegraph.rs
@@ -76,10 +76,10 @@
     rsgBindProgramStore(gPFSBackground);
     rsgBindTexture(gPFBackground, 0, gTGrid);
 
-    rsgProgramVertexLoadModelMatrix((rs_matrix4x4 *)&robot1Ptr->globalMat_Row0);
+    rsgProgramVertexLoadModelMatrix(&robot1Ptr->globalMat);
     rsgDrawMesh(gTestMesh);
 
-    rsgProgramVertexLoadModelMatrix((rs_matrix4x4 *)&robot2Ptr->globalMat_Row0);
+    rsgProgramVertexLoadModelMatrix(&robot2Ptr->globalMat);
     rsgDrawMesh(gTestMesh);
 
     color(0.3f, 0.3f, 0.3f, 1.0f);
diff --git a/libs/rs/java/ModelViewer/src/com/android/modelviewer/transform.rs b/libs/rs/java/ModelViewer/src/com/android/modelviewer/transform.rs
index 7b9cd1c..2ef29cf 100644
--- a/libs/rs/java/ModelViewer/src/com/android/modelviewer/transform.rs
+++ b/libs/rs/java/ModelViewer/src/com/android/modelviewer/transform.rs
@@ -52,8 +52,8 @@
     //rsDebug("Transform data", (int)data);
     //rsDebug("Entering parent", (int)parent);
 
-    rs_matrix4x4 *localMat = (rs_matrix4x4*)&data->localMat_Row0;
-    rs_matrix4x4 *globalMat = (rs_matrix4x4*)&data->globalMat_Row0;
+    rs_matrix4x4 *localMat = &data->localMat;
+    rs_matrix4x4 *globalMat = &data->globalMat;
 
     ParentData toChild;
     toChild.changed = 0;
diff --git a/libs/rs/java/ModelViewer/src/com/android/modelviewer/transform_def.rsh b/libs/rs/java/ModelViewer/src/com/android/modelviewer/transform_def.rsh
index a66e6c5..5c872a7 100644
--- a/libs/rs/java/ModelViewer/src/com/android/modelviewer/transform_def.rsh
+++ b/libs/rs/java/ModelViewer/src/com/android/modelviewer/transform_def.rsh
@@ -22,15 +22,8 @@
 #define TRANSFORM_SCALE 3
 
 typedef struct {
-    float4 globalMat_Row0;
-    float4 globalMat_Row1;
-    float4 globalMat_Row2;
-    float4 globalMat_Row3;
-
-    float4 localMat_Row0;
-    float4 localMat_Row1;
-    float4 localMat_Row2;
-    float4 localMat_Row3;
+    rs_matrix4x4 globalMat;
+    rs_matrix4x4 localMat;
 
     float4 transforms0;
     float4 transforms1;
diff --git a/libs/rs/rsComponent.cpp b/libs/rs/rsComponent.cpp
index fbaa75f..f51b23e 100644
--- a/libs/rs/rsComponent.cpp
+++ b/libs/rs/rsComponent.cpp
@@ -95,6 +95,26 @@
         mNormalized = true;
         rsAssert(mKind == RS_KIND_PIXEL_RGBA);
         return;
+
+    case RS_TYPE_MATRIX_4X4:
+        mTypeBits = 16 * 32;
+        rsAssert(mVectorSize == 1);
+        rsAssert(mNormalized == false);
+        rsAssert(mKind == RS_KIND_USER);
+        break;
+    case RS_TYPE_MATRIX_3X3:
+        mTypeBits = 9 * 32;
+        rsAssert(mVectorSize == 1);
+        rsAssert(mNormalized == false);
+        rsAssert(mKind == RS_KIND_USER);
+        break;
+    case RS_TYPE_MATRIX_2X2:
+        mTypeBits = 4 * 32;
+        rsAssert(mVectorSize == 1);
+        rsAssert(mNormalized == false);
+        rsAssert(mKind == RS_KIND_USER);
+        break;
+
     case RS_TYPE_ELEMENT:
     case RS_TYPE_TYPE:
     case RS_TYPE_ALLOCATION:
@@ -218,10 +238,19 @@
         case 4: return String8("vec4");
         }
     }
+    if ((mType == RS_TYPE_MATRIX_4X4) && (mVectorSize == 1)) {
+        return String8("mat4");
+    }
+    if ((mType == RS_TYPE_MATRIX_3X3) && (mVectorSize == 1)) {
+        return String8("mat3");
+    }
+    if ((mType == RS_TYPE_MATRIX_2X2) && (mVectorSize == 1)) {
+        return String8("mat2");
+    }
     return String8();
 }
 
-static const char * gTypeStrings[] = {
+static const char * gTypeBasicStrings[] = {
     "NONE",
     "F16",
     "F32",
@@ -238,6 +267,12 @@
     "UP_565",
     "UP_5551",
     "UP_4444",
+    "MATRIX_4X4",
+    "MATRIX_3X3",
+    "MATRIX_2X2",
+};
+
+static const char * gTypeObjStrings[] = {
     "ELEMENT",
     "TYPE",
     "ALLOCATION",
@@ -267,8 +302,13 @@
 
 void Component::dumpLOGV(const char *prefix) const
 {
-    LOGV("%s   Component: %s, %s, vectorSize=%i, bits=%i",
-         prefix, gTypeStrings[mType], gKindStrings[mKind], mVectorSize, mBits);
+    if (mType >= RS_TYPE_ELEMENT) {
+        LOGV("%s   Component: %s, %s, vectorSize=%i, bits=%i",
+             prefix, gTypeObjStrings[mType - RS_TYPE_ELEMENT], gKindStrings[mKind], mVectorSize, mBits);
+    } else {
+        LOGV("%s   Component: %s, %s, vectorSize=%i, bits=%i",
+             prefix, gTypeBasicStrings[mType], gKindStrings[mKind], mVectorSize, mBits);
+    }
 }
 
 void Component::serialize(OStream *stream) const
diff --git a/libs/rs/rsContext.cpp b/libs/rs/rsContext.cpp
index 08dd57b..f67a9d5 100644
--- a/libs/rs/rsContext.cpp
+++ b/libs/rs/rsContext.cpp
@@ -713,10 +713,10 @@
 uint32_t Context::getMessageToClient(void *data, size_t *receiveLen, size_t bufferLen, bool wait)
 {
     //LOGE("getMessageToClient %i %i", bufferLen, wait);
+    *receiveLen = 0;
     if (!wait) {
         if (mIO.mToClient.isEmpty()) {
             // No message to get and not going to wait for one.
-            receiveLen = 0;
             return 0;
         }
     }