[poc] curve-filter

third_party/WebKit/Source/web/PageOverlay.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  * 1. Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *
@@ skipping 17 matching lines @@
 
 #include "web/PageOverlay.h"
 
 #include "core/frame/FrameHost.h"
 #include "core/frame/Settings.h"
 #include "core/page/Page.h"
 #include "core/page/scrolling/ScrollingCoordinator.h"
 #include "platform/graphics/GraphicsContext.h"
 #include "platform/graphics/GraphicsLayer.h"
 #include "platform/graphics/GraphicsLayerClient.h"
+#include "platform/graphics/GraphicsScreen.h"
 #include "public/platform/WebLayer.h"
 #include "public/web/WebViewClient.h"
 #include "web/WebDevToolsAgentImpl.h"
 #include "web/WebViewImpl.h"
 
 namespace blink {
 
 PassOwnPtr<PageOverlay> PageOverlay::create(WebViewImpl* viewImpl, PageOverlay::Delegate* delegate)
 {
     return adoptPtr(new PageOverlay(viewImpl, delegate));
@@ skipping 48 matching lines @@
     m_layer->setNeedsDisplay();
 }
 
 IntRect PageOverlay::computeInterestRect(const GraphicsLayer* graphicsLayer, const IntRect&) const
 {
     return IntRect(IntPoint(), expandedIntSize(m_layer->size()));
 }
 
 void PageOverlay::paintContents(const GraphicsLayer* graphicsLayer, GraphicsContext& gc, GraphicsLayerPaintingPhase phase, const IntRect& interestRect) const
 {
-    ASSERT(m_layer);
+    WillPaintForDevice device(Page::screenId(m_viewImpl->page()));
+
+    ASSERT(m_viewImpl->page() && m_layer);
     m_delegate->paintPageOverlay(*this, gc, interestRect.size());
 }
 
 String PageOverlay::debugName(const GraphicsLayer*) const
 {
     return "WebViewImpl Page Overlay Content Layer";
 }
 
 } // namespace blink