Bug 1054161. Don't build display items for text with alpha=0. r=dbaron

--HG-- extra : rebase_source : 869a05a652a3bc6e8e122d34fb166ed9fbbdaa5c
dothq · Aug 22, 2014 · 41cde90 · 41cde90
1 parent 3236b7a
commit 41cde90
Showing 1 changed file with 9 additions and 0 deletions.
diff --git a/layout/generic/nsTextFrame.cpp b/layout/generic/nsTextFrame.cpp
@@ -4580,6 +4580,15 @@ nsTextFrame::BuildDisplayList(nsDisplayListBuilder*   aBuilder,
 
   DO_GLOBAL_REFLOW_COUNT_DSP("nsTextFrame");
 
+  if (NS_GET_A(StyleColor()->mColor) == 0 &&
+      !IsSVGText() && !IsSelected() && !StyleText()->HasTextShadow()) {
+    TextDecorations textDecs;
+    GetTextDecorations(PresContext(), eResolvedColors, textDecs);
+    if (!textDecs.HasDecorationLines()) {
+      return;
+    }
+  }
+
   aLists.Content()->AppendNewToTop(
     new (aBuilder) nsDisplayText(aBuilder, this));
 }