First version of new merge algorithm (not enabled yet)

Source/core/paint/LayerClipRecorderTest.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 "config.h"
 #include "core/paint/LayerClipRecorder.h"
 
 #include "core/layout/compositing/RenderLayerCompositor.h"
+#include "core/paint/RenderDrawingRecorder.h"
 #include "core/rendering/RenderView.h"
 #include "core/rendering/RenderingTestHelper.h"
 #include "platform/graphics/GraphicsContext.h"
 #include "platform/graphics/GraphicsLayer.h"
 #include "platform/graphics/paint/DisplayItemList.h"
 #include <gtest/gtest.h>
 
 namespace blink {
 namespace {
 
@@ skipping 13 matching lines @@
         RenderingTest::SetUp();
         enableCompositing();
 
         m_renderView = document().view()->renderView();
         ASSERT_TRUE(m_renderView);
     }
 
     RenderView* m_renderView;
 };
 
-void drawClip(GraphicsContext* context, RenderView* renderer, PaintPhase phase, const FloatRect& bound)
+void drawEmptyClip(GraphicsContext* context, RenderView* renderer, PaintPhase phase, const FloatRect& bound)
 {
     IntRect rect(1, 1, 9, 9);
     ClipRect clipRect(rect);
     LayerClipRecorder LayerClipRecorder(renderer->compositor()->rootRenderLayer()->renderer(), context, DisplayItem::ClipLayerForeground, clipRect, 0, LayoutPoint(), PaintLayerFlags());
 }
 
-TEST_F(LayerClipRecorderTest, LayerClipRecorderTest_Single)
+void drawRectInClip(GraphicsContext* context, RenderView* renderer, PaintPhase phase, const FloatRect& bound)
+{
+    IntRect rect(1, 1, 9, 9);
+    ClipRect clipRect(rect);
+    LayerClipRecorder LayerClipRecorder(renderer->compositor()->rootRenderLayer()->renderer(), context, DisplayItem::ClipLayerForeground, clipRect, 0, LayoutPoint(), PaintLayerFlags());
+    RenderDrawingRecorder drawingRecorder(context, *renderer, phase, bound);
+    if (!drawingRecorder.canUseCachedDrawing())
+        context->drawRect(rect);
+}
+
+TEST_F(LayerClipRecorderTest, Single)
 {
     GraphicsContext context(nullptr, &rootDisplayItemList());
     FloatRect bound = renderView()->viewRect();
     EXPECT_EQ((size_t)0, rootDisplayItemList().paintList().size());
 
-    drawClip(&context, renderView(), PaintPhaseForeground, bound);
+    drawRectInClip(&context, renderView(), PaintPhaseForeground, bound);
     rootDisplayItemList().endNewPaints();
-    EXPECT_EQ((size_t)2, rootDisplayItemList().paintList().size());
+    EXPECT_EQ((size_t)3, rootDisplayItemList().paintList().size());
+    EXPECT_TRUE(rootDisplayItemList().paintList()[0]->isClip());
+    EXPECT_TRUE(rootDisplayItemList().paintList()[1]->isDrawing());
+    EXPECT_TRUE(rootDisplayItemList().paintList()[2]->isEndClip());
+}
+
+TEST_F(LayerClipRecorderTest, Empty)
+{
+    GraphicsContext context(nullptr, &rootDisplayItemList());
+    FloatRect bound = renderView()->viewRect();
+    EXPECT_EQ((size_t)0, rootDisplayItemList().paintList().size());
+
+    drawEmptyClip(&context, renderView(), PaintPhaseForeground, bound);
+    rootDisplayItemList().endNewPaints();
+    EXPECT_EQ((size_t)0, rootDisplayItemList().paintList().size());
 }
 
 }
 }