--- a/graphicscomposition/openwfcompositionengine/composition/src/wfcpipeline.c	Fri Apr 23 15:29:19 2010 +0100
+++ b/graphicscomposition/openwfcompositionengine/composition/src/wfcpipeline.c	Fri Apr 23 17:57:02 2010 +0100
@@ -103,10 +103,6 @@
     state->blendInfo.mask                  = state->originalMaskImage ? state->maskImage : NULL;
     state->blendInfo.globalAlpha           = state->globalAlpha;
     
-    /* composition does not use these values ever */
-    state->blendInfo.tsColor                = NULL;
-    state->blendInfo.destinationFullyOpaque = OWF_FALSE;    
-    
     DPRINT(("  globalAplha = %f", state->globalAlpha));
     /* no need to check with OWF_ALPHA_MIN_VALUE as it is zero */
     OWF_ASSERT(state->blendInfo.globalAlpha <= OWF_ALPHA_MAX_VALUE);    
@@ -352,6 +348,21 @@
     state->globalAlpha = element->globalAlpha;
     state->sourceScaleFilter = element->sourceScaleFilter;
     state->transparencyTypes = element->transparencyTypes;
+
+    if (state->transparencyTypes & WFC_TRANSPARENCY_ELEMENT_GLOBAL_ALPHA)
+        {
+        if (state->globalAlpha == OWF_FULLY_TRANSPARENT)
+            {
+            /* Fully transparent element - no contribution. */
+            return NULL;
+            }
+        if (state->globalAlpha == OWF_FULLY_OPAQUE)
+            {
+            /* Fully opaque global alpha - global alpha can be ignored */
+            state->transparencyTypes &= ~WFC_TRANSPARENCY_ELEMENT_GLOBAL_ALPHA;
+            }
+        }
+    
     /* replicate the source viewport rectangle and target extent rectangle */
     for (x = 0; x < 4; x++)
     {