diff --git a/libs/rs/driver/rsdGL.cpp b/libs/rs/driver/rsdGL.cpp
index b136cc7..a1d1d53 100644
--- a/libs/rs/driver/rsdGL.cpp
+++ b/libs/rs/driver/rsdGL.cpp
@@ -455,3 +455,37 @@
     }
 
 }
+
+void rsdGLClearColor(const android::renderscript::Context *rsc,
+                     float r, float g, float b, float a) {
+    RSD_CALL_GL(glClearColor, r, g, b, a);
+    RSD_CALL_GL(glClear, GL_COLOR_BUFFER_BIT);
+}
+
+void rsdGLClearDepth(const android::renderscript::Context *rsc, float v) {
+    RSD_CALL_GL(glClearDepthf, v);
+    RSD_CALL_GL(glClear, GL_DEPTH_BUFFER_BIT);
+}
+
+void rsdGLFinish(const android::renderscript::Context *rsc) {
+    RSD_CALL_GL(glFinish);
+}
+
+void rsdGLDrawQuadTexCoords(const android::renderscript::Context *rsc,
+                            float x1, float y1, float z1, float u1, float v1,
+                            float x2, float y2, float z2, float u2, float v2,
+                            float x3, float y3, float z3, float u3, float v3,
+                            float x4, float y4, float z4, float u4, float v4) {
+
+    float vtx[] = {x1,y1,z1, x2,y2,z2, x3,y3,z3, x4,y4,z4};
+    const float tex[] = {u1,v1, u2,v2, u3,v3, u4,v4};
+
+    RsdVertexArray::Attrib attribs[2];
+    attribs[0].set(GL_FLOAT, 3, 12, false, (uint32_t)vtx, "ATTRIB_position");
+    attribs[1].set(GL_FLOAT, 2, 8, false, (uint32_t)tex, "ATTRIB_texture0");
+
+    RsdVertexArray va(attribs, 2);
+    va.setup(rsc);
+
+    RSD_CALL_GL(glDrawArrays, GL_TRIANGLE_FAN, 0, 4);
+}
diff --git a/libs/rs/driver/rsdGL.h b/libs/rs/driver/rsdGL.h
index e015cb1..1e5b40f 100644
--- a/libs/rs/driver/rsdGL.h
+++ b/libs/rs/driver/rsdGL.h
@@ -84,6 +84,15 @@
                      const char *msg, bool isFatal = false);
 void rsdGLSetPriority(const android::renderscript::Context *rsc,
                       int32_t priority);
+void rsdGLClearColor(const android::renderscript::Context *rsc,
+                     float r, float g, float b, float a);
+void rsdGLClearDepth(const android::renderscript::Context *rsc, float v);
+void rsdGLFinish(const android::renderscript::Context *rsc);
+void rsdGLDrawQuadTexCoords(const android::renderscript::Context *rsc,
+                            float x1, float y1, float z1, float u1, float v1,
+                            float x2, float y2, float z2, float u2, float v2,
+                            float x3, float y3, float z3, float u3, float v3,
+                            float x4, float y4, float z4, float u4, float v4);
 
 #endif
 
diff --git a/libs/rs/driver/rsdRuntimeStubs.cpp b/libs/rs/driver/rsdRuntimeStubs.cpp
index 44bfb1c..aa9f159 100644
--- a/libs/rs/driver/rsdRuntimeStubs.cpp
+++ b/libs/rs/driver/rsdRuntimeStubs.cpp
@@ -257,17 +257,19 @@
 
 static void SC_Finish() {
     GET_TLS();
-    rsrFinish(rsc, sc);
+    rsdGLFinish(rsc);
 }
 
 static void SC_ClearColor(float r, float g, float b, float a) {
     GET_TLS();
-    rsrClearColor(rsc, sc, r, g, b, a);
+    rsrPrepareClear(rsc, sc);
+    rsdGLClearColor(rsc, r, g, b, a);
 }
 
 static void SC_ClearDepth(float v) {
     GET_TLS();
-    rsrClearDepth(rsc, sc, v);
+    rsrPrepareClear(rsc, sc);
+    rsdGLClearDepth(rsc, v);
 }
 
 static uint32_t SC_GetWidth() {
diff --git a/libs/rs/rsRuntime.h b/libs/rs/rsRuntime.h
index 3bded62..64f2de8 100644
--- a/libs/rs/rsRuntime.h
+++ b/libs/rs/rsRuntime.h
@@ -86,7 +86,6 @@
 
 
 void rsrColor(Context *, Script *, float r, float g, float b, float a);
-void rsrFinish(Context *, Script *);
 void rsrAllocationSyncAll(Context *, Script *, Allocation *);
 
 void rsrAllocationCopy1DRange(Context *, Allocation *dstAlloc,
@@ -103,8 +102,7 @@
                               uint32_t srcXoff, uint32_t srcYoff,
                               uint32_t srcMip, uint32_t srcFace);
 
-void rsrClearColor(Context *, Script *, float r, float g, float b, float a);
-void rsrClearDepth(Context *, Script *, float v);
+void rsrPrepareClear(Context *, Script *);
 uint32_t rsrGetWidth(Context *, Script *);
 uint32_t rsrGetHeight(Context *, Script *);
 void rsrDrawTextAlloc(Context *, Script *, Allocation *, int x, int y);
diff --git a/libs/rs/rsScriptC_LibGL.cpp b/libs/rs/rsScriptC_LibGL.cpp
index 97469d3..bda18fd 100644
--- a/libs/rs/rsScriptC_LibGL.cpp
+++ b/libs/rs/rsScriptC_LibGL.cpp
@@ -269,25 +269,9 @@
     pf->setConstantColor(rsc, r, g, b, a);
 }
 
-void rsrFinish(Context *rsc, Script *sc) {
-    RSD_CALL_GL(glFinish);
-}
-
-
-void rsrClearColor(Context *rsc, Script *sc, float r, float g, float b, float a) {
+void rsrPrepareClear(Context *rsc, Script *sc) {
     rsc->mFBOCache.setup(rsc);
     rsc->setupProgramStore();
-
-    RSD_CALL_GL(glClearColor, r, g, b, a);
-    RSD_CALL_GL(glClear, GL_COLOR_BUFFER_BIT);
-}
-
-void rsrClearDepth(Context *rsc, Script *sc, float v) {
-    rsc->mFBOCache.setup(rsc);
-    rsc->setupProgramStore();
-
-    RSD_CALL_GL(glClearDepthf, v);
-    RSD_CALL_GL(glClear, GL_DEPTH_BUFFER_BIT);
 }
 
 uint32_t rsrGetWidth(Context *rsc, Script *sc) {