Bug 940455 - Add LayerManager functonality to clear out a portion of the window for the OS to paint. r=roc,Bas

2014-02-13 13:20:41 +13:00
parent 69560da592
commit 93029b755f
16 changed files with 6447 additions and 5692 deletions
--- a/gfx/layers/basic/BasicLayerManager.cpp
+++ b/gfx/layers/basic/BasicLayerManager.cpp
@@ -625,6 +625,16 @@ BasicLayerManager::EndTransactionInternal(DrawThebesLayerCallback aCallback,
    }

    PaintLayer(mTarget, mRoot, aCallback, aCallbackData, nullptr);
+    if (!mRegionToClear.IsEmpty()) {
+      AutoSetOperator op(mTarget, gfxContext::OPERATOR_CLEAR);
+      nsIntRegionRectIterator iter(mRegionToClear);
+      const nsIntRect *r;
+      while ((r = iter.Next())) {
+        mTarget->NewPath();
+        mTarget->Rectangle(gfxRect(r->x, r->y, r->width, r->height));
+        mTarget->Fill();
+      }
+    }
    if (mWidget) {
      FlashWidgetUpdateArea(mTarget);
    }