Bug 276431 Patch 8: Handle kFullImageSpaceRect in the only nontrivial imgIDecoderObserver::OnDataAvailable impl. r=roc a=blocking

layout/generic/nsImageFrame.cpp

@@ -565,10 +565,6 @@ nsImageFrame::OnDataAvailable(imgIRequest *aRequest,
     return NS_OK;
   }
   
-  // XXX We really need to round this out, now that we're doing better
-  // image scaling!
-  nsRect r = SourceRectToDest(*aRect);
-
   if (IsPendingLoad(aRequest)) {
     // We don't care
     return NS_OK;
@@ -579,6 +575,12 @@ nsImageFrame::OnDataAvailable(imgIRequest *aRequest,
   if (!aCurrentFrame)
     return NS_OK;
 
+  // XXX We really need to round this out, now that we're doing better
+  // image scaling!
+  nsRect r = (*aRect == mozilla::imagelib::kFullImageSpaceRect) ?
+    GetInnerArea() :
+    SourceRectToDest(*aRect);
+
 #ifdef DEBUG_decode
   printf("Source rect (%d,%d,%d,%d) -> invalidate dest rect (%d,%d,%d,%d)\n",
          aRect->x, aRect->y, aRect->width, aRect->height,