Bug 1048110 - Expand complex visible regions if we're going to be resampling when using tiling. r=Bas

2014-08-04 15:29:55 +12:00
parent d60fcf9c67
commit 7d7314e136
12 changed files with 51 additions and 63 deletions
--- a/gfx/layers/client/TiledContentClient.cpp
+++ b/gfx/layers/client/TiledContentClient.cpp
@@ -327,6 +327,12 @@ ClientTiledLayerBuffer::GetContentType(SurfaceMode* aMode) const
        content = gfxContentType::COLOR;
      }
 #endif
+  } else if (mode == SurfaceMode::SURFACE_OPAQUE) {
+    if (mThebesLayer->GetVisibleRegion().GetNumRects() > 1 &&
+        mThebesLayer->MayResample()) {
+      mode = SurfaceMode::SURFACE_SINGLE_CHANNEL_ALPHA;
+      content = gfxContentType::COLOR_ALPHA;
+    }
  }

  if (aMode) {