(WIP) Invalidation during painting (for synchronized painting)

third_party/WebKit/Source/core/paint/LayoutObjectDrawingRecorderTest.cpp

 // Copyright 2014 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/paint/LayoutObjectDrawingRecorder.h"
 
 #include "core/layout/LayoutTestHelper.h"
 #include "core/layout/LayoutView.h"
 #include "core/paint/PaintControllerPaintTest.h"
+#include "core/paint/PaintInfo.h"
 #include "core/paint/PaintLayer.h"
 #include "platform/graphics/GraphicsContext.h"
 #include "platform/graphics/GraphicsLayer.h"
 #include "platform/graphics/paint/DrawingDisplayItem.h"
 #include "platform/graphics/paint/PaintController.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace blink {
 
 using LayoutObjectDrawingRecorderTest = PaintControllerPaintTest;
 
 namespace {
 
 void drawNothing(GraphicsContext& context, const LayoutView& layoutView, PaintPhase phase, const LayoutRect& bound)
 {
-    if (LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(context, layoutView, phase, LayoutPoint()))
+    if (LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(context, layoutView, phase))
         return;
 
-    LayoutObjectDrawingRecorder drawingRecorder(context, layoutView, phase, bound, LayoutPoint());
+    LayoutObjectDrawingRecorder drawingRecorder(context, layoutView, phase, bound);
 }
 
 void drawRect(GraphicsContext& context, LayoutView& layoutView, PaintPhase phase, const LayoutRect& bound)
 {
-    if (LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(context, layoutView, phase, LayoutPoint()))
+    if (LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(context, layoutView, phase))
         return;
-    LayoutObjectDrawingRecorder drawingRecorder(context, layoutView, phase, bound, LayoutPoint());
+    LayoutObjectDrawingRecorder drawingRecorder(context, layoutView, phase, bound);
     IntRect rect(0, 0, 10, 10);
     context.drawRect(rect);
 }
 
 TEST_F(LayoutObjectDrawingRecorderTest, Nothing)
 {
     rootPaintController().invalidateAll();
     GraphicsContext context(rootPaintController());
     LayoutRect bound = layoutView().viewRect();
     drawNothing(context, layoutView(), PaintPhaseForeground, bound);
@@ skipping 41 matching lines @@
         TestDisplayItem(layoutView(), DisplayItem::paintPhaseToDrawingType(PaintPhaseForeground)));
 }
 
 template <typename T>
 FloatRect drawAndGetCullRect(PaintController& controller, const LayoutObject& layoutObject, const T& bounds)
 {
     controller.invalidateAll();
     {
         // Draw some things which will produce a non-null picture.
         GraphicsContext context(controller);
-        LayoutObjectDrawingRecorder recorder(
-            context, layoutObject, DisplayItem::BoxDecorationBackground, bounds, LayoutPoint());
+        LayoutObjectDrawingRecorder recorder(context, layoutObject, DisplayItem::BoxDecorationBackground, bounds);
         context.drawRect(enclosedIntRect(FloatRect(bounds)));
     }
     controller.commitNewDisplayItems();
     const auto& drawing = static_cast<const DrawingDisplayItem&>(controller.displayItemList()[0]);
     return drawing.picture()->cullRect();
 }
 
 TEST_F(LayoutObjectDrawingRecorderTest, CullRectMatchesProvidedClip)
 {
     // It's safe for the picture's cull rect to be expanded (though doing so
     // excessively may harm performance), but it cannot be contracted.
     // For now, this test expects the two rects to match completely.
     //
     // This rect is chosen so that in the x direction, pixel snapping rounds in
     // the opposite direction to enclosing, and in the y direction, the edges
     // are exactly on a half-pixel boundary. The numbers chosen map nicely to
     // both float and LayoutUnit, to make equality checking reliable.
     FloatRect rect(20.75, -5.5, 5.375, 10);
     EXPECT_EQ(rect, drawAndGetCullRect(rootPaintController(), layoutView(), rect));
     EXPECT_EQ(rect, drawAndGetCullRect(rootPaintController(), layoutView(), LayoutRect(rect)));
 }
 
 TEST_F(LayoutObjectDrawingRecorderTest, PaintOffsetCache)
 {
-    RuntimeEnabledFeatures::setSlimmingPaintOffsetCachingEnabled(true);
+    layoutView().document().lifecycle().advanceTo(DocumentLifecycle::InCompositingUpdate);
+    layoutView().document().lifecycle().advanceTo(DocumentLifecycle::CompositingClean);
+
+    RuntimeEnabledFeatures::setSlimmingPaintSynchronizedPaintingEnabled(true);
+    layoutView().document().lifecycle().advanceTo(DocumentLifecycle::InPaint);
 
     GraphicsContext context(rootPaintController());
     LayoutRect bounds = layoutView().viewRect();
     LayoutPoint paintOffset(1, 2);
+    layoutView().setPreviousPaintOffset(paintOffset);
+    PaintInvalidationState paintInvalidationState(layoutView(), LayoutRect(), 0);
+    PaintInfo paintInfo(&context, IntRect(0, 0, 100, 100), PaintPhaseForeground, 0, 0);
+    paintInfo.paintInvalidationState = &paintInvalidationState;
 
     rootPaintController().invalidateAll();
-    EXPECT_FALSE(LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(context, layoutView(), PaintPhaseForeground, paintOffset));
+    EXPECT_FALSE(LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(context, layoutView(), PaintPhaseForeground));
     {
-        LayoutObjectDrawingRecorder drawingRecorder(context, layoutView(), PaintPhaseForeground, bounds, paintOffset);
+        LayoutObjectDrawingRecorder drawingRecorder(context, layoutView(), PaintPhaseForeground, bounds);
         IntRect rect(0, 0, 10, 10);
         context.drawRect(rect);
     }
 
-    rootPaintController().commitNewDisplayItems();
+    GraphicsLayer* graphicsLayer = layoutView().layer()->graphicsLayerBacking();
+    rootPaintController().commitNewDisplayItems(graphicsLayer);
     EXPECT_DISPLAY_LIST(rootPaintController().displayItemList(), 1,
         TestDisplayItem(layoutView(), DisplayItem::paintPhaseToDrawingType(PaintPhaseForeground)));
 
     // Ensure we cannot use the cache with a new paint offset.
     LayoutPoint newPaintOffset(2, 3);
-    EXPECT_FALSE(LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(context, layoutView(), PaintPhaseForeground, newPaintOffset));
+    layoutView().mutableForPainting().invalidatePaintIfNeeded(paintInfo, newPaintOffset);
+    EXPECT_FALSE(LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(context, layoutView(), PaintPhaseForeground));
 
     // Test that a new paint offset is recorded.
     {
-        LayoutObjectDrawingRecorder drawingRecorder(context, layoutView(), PaintPhaseForeground, bounds, newPaintOffset);
+        LayoutObjectDrawingRecorder drawingRecorder(context, layoutView(), PaintPhaseForeground, bounds);
         IntRect rect(0, 0, 10, 10);
         context.drawRect(rect);
     }
 
-    rootPaintController().commitNewDisplayItems();
+    rootPaintController().commitNewDisplayItems(graphicsLayer);
     EXPECT_DISPLAY_LIST(rootPaintController().displayItemList(), 1,
         TestDisplayItem(layoutView(), DisplayItem::paintPhaseToDrawingType(PaintPhaseForeground)));
 
-    // Ensure the old paint offset cannot be used.
-    EXPECT_FALSE(LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(context, layoutView(), PaintPhaseForeground, paintOffset));
-
     // Ensure the new paint offset can be used.
-    EXPECT_TRUE(LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(context, layoutView(), PaintPhaseForeground, newPaintOffset));
-    rootPaintController().commitNewDisplayItems();
+    layoutView().mutableForPainting().invalidatePaintIfNeeded(paintInfo, newPaintOffset);
+    EXPECT_TRUE(LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(context, layoutView(), PaintPhaseForeground));
+    rootPaintController().commitNewDisplayItems(graphicsLayer);
     EXPECT_DISPLAY_LIST(rootPaintController().displayItemList(), 1,
         TestDisplayItem(layoutView(), DisplayItem::paintPhaseToDrawingType(PaintPhaseForeground)));
 }
 
 } // namespace
 } // namespace blink