LayoutObject::invalidatePaintIfNeededForSynchronizedPainting() and plumbing

third_party/WebKit/Source/core/layout/LayoutObject.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  *           (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 58 matching lines @@
 #include "core/layout/LayoutTableCaption.h"
 #include "core/layout/LayoutTableCell.h"
 #include "core/layout/LayoutTableCol.h"
 #include "core/layout/LayoutTableRow.h"
 #include "core/layout/LayoutTheme.h"
 #include "core/layout/LayoutView.h"
 #include "core/layout/compositing/PaintLayerCompositor.h"
 #include "core/page/AutoscrollController.h"
 #include "core/page/Page.h"
 #include "core/paint/ObjectPainter.h"
+#include "core/paint/PaintInfo.h"
 #include "core/paint/PaintLayer.h"
 #include "core/style/ContentData.h"
 #include "core/style/ShadowList.h"
 #include "platform/JSONValues.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "platform/TraceEvent.h"
 #include "platform/TracedValue.h"
 #include "platform/geometry/TransformState.h"
 #include "platform/graphics/GraphicsContext.h"
 #include "platform/graphics/paint/DisplayItemList.h"
@@ skipping 1320 matching lines @@
     if (invalidationReason == PaintInvalidationIncremental) {
         incrementallyInvalidatePaint(paintInvalidationContainer, oldBounds, newBounds, newLocation);
         return invalidationReason;
     }
 
     fullyInvalidatePaint(paintInvalidationContainer, invalidationReason, oldBounds, newBounds);
 
     return invalidationReason;
 }
 
+void LayoutObject::invalidatePaintIfNeededForSynchronziedPainting(const PaintInfo& paintInfo)
+{
+    ASSERT(RuntimeEnabledFeatures::slimmingPaintSynchronizedPaintingEnabled());
+    ASSERT(document().lifecycle().state() == DocumentLifecycle::InPaint);
+    ASSERT(paintInfo.paintInvalidationState);
+    ASSERT(paintInfo.paintContainer());
+
+    DisplayItemList* displayItemList = paintInfo.context->displayItemList();
+    // TODO(chrishtr): paintInvalidationContainer for squashed layer.

[chrishtr, 2015/10/05 21:50:35]

This works out of the box. GraphicsLayer::paint calls into CLM::doPaintTask,
which
will loop over the paint layers and paint them.

[Xianzhu, 2015/10/05 22:04:15]

Done.

+    const LayoutBoxModelObject& paintInvalidationContainer = *paintInfo.paintContainer();
+
+    if (displayItemList->clientHasCheckedPaintInvalidation(displayItemClient())) {
+        ASSERT(displayItemList->clientCacheIsValid(displayItemClient())
+            == (invalidatePaintIfNeeded(*paintInfo.paintInvalidationState, paintInvalidationContainer) == PaintInvalidationNone));
+        return;
+    }
+
+    PaintInvalidationReason reason = invalidatePaintIfNeeded(*paintInfo.paintInvalidationState, paintInvalidationContainer);
+    clearPaintInvalidationState(*paintInfo.paintInvalidationState);
+
+    if (reason == PaintInvalidationDelayedFull)
+        paintInfo.paintInvalidationState->pushDelayedPaintInvalidationTarget(*this);
+
+    displayItemList->setClientHasCheckedPaintInvalidation(displayItemClient());
+}
+
 PaintInvalidationReason LayoutObject::paintInvalidationReason(const LayoutBoxModelObject& paintInvalidationContainer,
     const LayoutRect& oldBounds, const LayoutPoint& oldPositionFromPaintInvalidationBacking,
     const LayoutRect& newBounds, const LayoutPoint& newPositionFromPaintInvalidationBacking) const
 {
     // First check for InvalidationLocationChange to avoid it from being hidden by other
     // invalidation reasons because we'll need to force check for paint invalidation for
     // children when location of this object changed.
     if (newPositionFromPaintInvalidationBacking != oldPositionFromPaintInvalidationBacking)
         return PaintInvalidationLocationChange;
 
@@ skipping 2006 matching lines @@
         const blink::LayoutObject* root = object1;
         while (root->parent())
             root = root->parent();
         root->showLayoutTreeAndMark(object1, "*", object2, "-", 0);
     } else {
         fprintf(stderr, "Cannot showLayoutTree. Root is (nil)\n");
     }
 }
 
 #endif