Bug 1172796 - Part 2: Add write-only flag for origin-clean check. r=roc

2015-12-18 14:52:17 +08:00
parent a600a2a86f
commit d68a981993
3 changed files with 21 additions and 3 deletions
--- a/dom/html/HTMLCanvasElement.cpp
+++ b/dom/html/HTMLCanvasElement.cpp
@@ -783,6 +783,10 @@ HTMLCanvasElement::TransferControlToOffscreen(ErrorResult& aRv)
                                           sz.height,
                                           GetCompositorBackendType(),
                                           renderer);
+    if (mWriteOnly) {
+      mOffscreenCanvas->SetWriteOnly();
+    }
+
    if (!mContextObserver) {
      mContextObserver = new HTMLCanvasElementObserver(this);
    }