WIP: Reset paint invalidation at transform boundaries.

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

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/layout/LayoutTestHelper.h"
 #include "core/layout/LayoutView.h"
 #include "core/layout/PaintInvalidationState.h"
 #include "core/paint/PaintLayer.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace blink {
 
 class VisualRectMappingTest : public RenderingTest {
 public:
     VisualRectMappingTest()
         : RenderingTest(SingleChildFrameLoaderClient::create()) {}
 protected:
     LayoutView& layoutView() const { return *document().layoutView(); }
 
     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;
         paintInvalidationStates[0].emplace(layoutView, pendingDelayedPaintInvalidations);
         if (layoutView != object)
             paintInvalidationStates[0]->updateForChildren(PaintInvalidationFull);
         for (size_t i = 1; i < paintInvalidationStates.size(); ++i) {
             paintInvalidationStates[i].emplace(*paintInvalidationStates[i - 1], *ancestors[ancestors.size() - i]);
             if (paintInvalidationStates[i]->m_currentObject != object)
                 paintInvalidationStates[i]->updateForChildren(PaintInvalidationFull);
@@ skipping 405 matching lines @@
     EXPECT_EQ(LayoutRect(0, 0, 140, 110), rect);
 
     rect = targetOverflowRect;
     EXPECT_TRUE(target->mapToVisualRectInAncestorSpace(container, rect));
     // -2 = target_physical_x(100) + container_border_left(40) - scroll_left(142)
     // 3 = target_y(0) + container_border_top(10) - scroll_top(7)
     // Rect is not clipped by container's overflow clip.
     EXPECT_EQ(LayoutRect(-2, 3, 140, 110), rect);
 }
 
-TEST_F(VisualRectMappingTest, DifferentPaintInvalidaitionContainerForAbsolutePosition)
+TEST_F(VisualRectMappingTest, DifferentPaintInvalidationContainerForAbsolutePosition)
 {
     enableCompositing();
     document().frame()->settings()->setPreferCompositingToLCDTextEnabled(true);
 
     setBodyInnerHTML(
         "<div id='stacking-context' style='opacity: 0.9; background: blue; will-change: transform'>"
         "    <div id='scroller' style='overflow: scroll; width: 80px; height: 80px'>"
         "        <div id='absolute' style='position: absolute; top: 111px; left: 222px; width: 50px; height: 50px; background: green'></div>"
         "        <div id='normal-flow' style='width: 2000px; height: 2000px; background: yellow'></div>"
         "    </div>"
@@ skipping 51 matching lines @@
 
     LayoutRect absoluteOverflowRect = absolute->localOverflowRectForPaintInvalidation();
     EXPECT_EQ(LayoutRect(0, 0, 50, 50), absoluteOverflowRect);
     LayoutRect rect = absoluteOverflowRect;
     EXPECT_TRUE(absolute->mapToVisualRectInAncestorSpace(stackingContext, rect));
     // -172 = top(50) - y_offset_of_stacking_context(222)
     EXPECT_EQ(LayoutRect(50, -172, 50, 50), rect);
     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