WIP: Reset paint invalidation at transform boundaries.

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

Index: third_party/WebKit/Source/core/layout/VisualRectMappingTest.cpp
diff --git a/third_party/WebKit/Source/core/layout/VisualRectMappingTest.cpp b/third_party/WebKit/Source/core/layout/VisualRectMappingTest.cpp
index 16266d3b97fb408ee2fbec9f287f161d88745d05..9e1e877955fd6e6b41ff33cdf5abeec117281947 100644
--- a/third_party/WebKit/Source/core/layout/VisualRectMappingTest.cpp
+++ b/third_party/WebKit/Source/core/layout/VisualRectMappingTest.cpp
@@ -20,8 +20,11 @@ protected:
     void checkPaintInvalidationStateRectMapping(const LayoutRect& expectedRect, const LayoutRect& rect, const LayoutObject& object, const LayoutView& layoutView, const LayoutObject& paintInvalidationContainer)
     {
         Vector<const LayoutObject*> ancestors;
-        for (const LayoutObject* ancestor = &object; ancestor != layoutView; ancestor = ancestor->parentCrossingFrameBoundaries())
+        LOG(ERROR) << "checkPaintInvalidationStateRectMapping";
+        for (const LayoutObject* ancestor = &object; ancestor != layoutView; ancestor = ancestor->parentCrossingFrameBoundaries()) {
             ancestors.append(ancestor);
+            // ancestor->showLayoutObject();
+        }
 
         Vector<Optional<PaintInvalidationState>> paintInvalidationStates(ancestors.size() + 1);
         Vector<LayoutObject*> pendingDelayedPaintInvalidations;
@@ -447,7 +450,7 @@ TEST_F(VisualRectMappingTest, ContainerAndTargetDifferentFlippedWritingMode)
     EXPECT_EQ(LayoutRect(-2, 3, 140, 110), rect);
 }
 
-TEST_F(VisualRectMappingTest, DifferentPaintInvalidaitionContainerForAbsolutePosition)
+TEST_F(VisualRectMappingTest, DifferentPaintInvalidationContainerForAbsolutePosition)
 {
     enableCompositing();
     document().frame()->settings()->setPreferCompositingToLCDTextEnabled(true);
@@ -519,4 +522,33 @@ TEST_F(VisualRectMappingTest, ContainerOfAbsoluteAbovePaintInvalidationContainer
     checkPaintInvalidationStateRectMapping(rect, absoluteOverflowRect, *absolute, layoutView(), *stackingContext);
 }
 
+TEST_F(VisualRectMappingTest, Transform2D)
+{
+    enableCompositing();
+    document().frame()->settings()->setPreferCompositingToLCDTextEnabled(true);
+    setBodyInnerHTML(
+        "<div id='target' style='transform: translate(200px, 200px) rotatez(45deg); width: 200px; height: 200px; background: lightgray'>"
+        "</div>");
+
+    LayoutBlock* target = toLayoutBlock(getLayoutObjectByElementId("target"));
+    LayoutRect rect(target->frameRect());
+    EXPECT_TRUE(target->mapToVisualRectInAncestorSpace(&layoutView(), rect));
+    checkPaintInvalidationStateRectMapping(rect, target->frameRect(), *target, layoutView(), layoutView());
+}
+
+TEST_F(VisualRectMappingTest, Transform2DChild)
+{
+    enableCompositing();
+    document().frame()->settings()->setPreferCompositingToLCDTextEnabled(true);
+    setBodyInnerHTML(
+        "<div style='transform: translate(200px, 200px) rotatez(45deg); width: 200px; height: 200px; background: lightgray'>"
+        "  <div id='target' style='width: 50px; height: 50px; position: relative; top: 25px; left: 25px'></div>"
+        "</div>");
+
+    LayoutBlock* target = toLayoutBlock(getLayoutObjectByElementId("target"));
+    LayoutRect rect(target->frameRect());
+    EXPECT_TRUE(target->mapToVisualRectInAncestorSpace(&layoutView(), rect));
+
+    checkPaintInvalidationStateRectMapping(rect, target->frameRect(), *target, layoutView(), layoutView());
+}
 } // namespace blink