Record SkPicture with correct LCD text setting.

cc/trees/layer_tree_host_unittest.cc

 // Copyright 2011 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 "cc/trees/layer_tree_host.h"
 
 #include <algorithm>
 
 #include "base/auto_reset.h"
 #include "base/synchronization/lock.h"
@@ skipping 953 matching lines @@
 
 class TestOpacityChangeLayerDelegate : public ContentLayerClient {
  public:
   TestOpacityChangeLayerDelegate() : test_layer_(0) {}
 
   void SetTestLayer(Layer* test_layer) { test_layer_ = test_layer; }
 
   virtual void PaintContents(
       SkCanvas* canvas,
       const gfx::Rect& clip,
+      bool can_paint_lcd_text,
       gfx::RectF* opaque,
       ContentLayerClient::GraphicsContextStatus gc_status) OVERRIDE {
     // Set layer opacity to 0.
     if (test_layer_)
       test_layer_->SetOpacity(0.f);
   }
-  virtual void DidChangeLayerCanUseLCDText() OVERRIDE {}
+  virtual bool PaintsLCDText() const OVERRIDE { return false; }
   virtual bool FillsBoundsCompletely() const OVERRIDE { return false; }
 
  private:
   Layer* test_layer_;
 };
 
 class ContentLayerWithUpdateTracking : public ContentLayer {
  public:
   static scoped_refptr<ContentLayerWithUpdateTracking> Create(
       ContentLayerClient* client) {
@@ skipping 1184 matching lines @@
   FakeContentLayerClient client_;
   scoped_refptr<FakeContentLayer> root_layer_;
   scoped_refptr<FakeContentLayer> child_layer1_;
   scoped_refptr<FakeContentLayer> child_layer2_;
   int num_commits_;
 };
 
 SINGLE_AND_MULTI_THREAD_NOIMPL_TEST_F(
     LayerTreeHostTestShutdownWithOnlySomeResourcesEvicted);
 
-class LayerTreeHostTestLCDNotification : public LayerTreeHostTest {
+class LayerTreeHostTestLCDText : public LayerTreeHostTest {
  public:
-  class NotificationClient : public ContentLayerClient {
+  class LCDTextClient : public ContentLayerClient {
    public:
-    NotificationClient()
-        : layer_(0), paint_count_(0), lcd_notification_count_(0) {}
+    LCDTextClient(bool paints_lcd_text)
+        : paints_lcd_text_(paints_lcd_text),
+          paint_count_(0),
+          could_paint_lcd_text_last_frame_(false) {}
 
-    void set_layer(Layer* layer) { layer_ = layer; }
     int paint_count() const { return paint_count_; }
-    int lcd_notification_count() const { return lcd_notification_count_; }
+    int could_paint_lcd_text_last_frame() const {
+      return could_paint_lcd_text_last_frame_;
+    }
 
     virtual void PaintContents(
         SkCanvas* canvas,
         const gfx::Rect& clip,
+        bool can_paint_lcd_text,
         gfx::RectF* opaque,
         ContentLayerClient::GraphicsContextStatus gc_status) OVERRIDE {
       ++paint_count_;
+      could_paint_lcd_text_last_frame_ = can_paint_lcd_text;
     }
-    virtual void DidChangeLayerCanUseLCDText() OVERRIDE {
-      ++lcd_notification_count_;
-      layer_->SetNeedsDisplay();
-    }
+    virtual bool PaintsLCDText() const OVERRIDE { return paints_lcd_text_; }
     virtual bool FillsBoundsCompletely() const OVERRIDE { return false; }
 
    private:
-    Layer* layer_;
+    bool paints_lcd_text_;
     int paint_count_;
-    int lcd_notification_count_;
+    bool could_paint_lcd_text_last_frame_;
   };
 
   virtual void SetupTree() OVERRIDE {
-    scoped_refptr<ContentLayer> root_layer = ContentLayer::Create(&client_);
-    root_layer->SetIsDrawable(true);
-    root_layer->SetBounds(gfx::Size(1, 1));
+    LayerTreeHostTest::SetupTree();
 
-    layer_tree_host()->SetRootLayer(root_layer);
-    client_.set_layer(root_layer.get());
+    lcd_text_client_.reset(new LCDTextClient(true));
+    regular_text_client_.reset(new LCDTextClient(false));
 
-    // The expecations are based on the assumption that the default
-    // LCD settings are:
+    if (layer_tree_host()->settings().impl_side_painting) {
+      lcd_text_layer_ = PictureLayer::Create(lcd_text_client_.get());
+      regular_text_layer_ = PictureLayer::Create(regular_text_client_.get());
+    } else {
+      lcd_text_layer_ = ContentLayer::Create(lcd_text_client_.get());
+      regular_text_layer_ = ContentLayer::Create(regular_text_client_.get());
+    }
+    lcd_text_layer_->SetIsDrawable(true);
+    lcd_text_layer_->SetBounds(gfx::Size(1, 1));
+    layer_tree_host()->root_layer()->AddChild(lcd_text_layer_);
+    regular_text_layer_->SetIsDrawable(true);
+    regular_text_layer_->SetBounds(gfx::Size(1, 1));
+    layer_tree_host()->root_layer()->AddChild(regular_text_layer_);
+
+    // The expecations are based on the assumption that LCD text is enabled.
     EXPECT_TRUE(layer_tree_host()->settings().can_use_lcd_text);
-    EXPECT_FALSE(root_layer->can_use_lcd_text());
-
-    LayerTreeHostTest::SetupTree();
   }
 
   virtual void BeginTest() OVERRIDE { PostSetNeedsCommitToMainThread(); }
   virtual void AfterTest() OVERRIDE {}
 
   virtual void DidCommit() OVERRIDE {
     switch (layer_tree_host()->source_frame_number()) {
       case 1:
-        // The first update consists one LCD notification and one paint.
-        EXPECT_EQ(1, client_.lcd_notification_count());
-        EXPECT_EQ(1, client_.paint_count());
-        // LCD text must have been enabled on the layer.
-        EXPECT_TRUE(layer_tree_host()->root_layer()->can_use_lcd_text());
+        // LCD text must be enabled on both layers.
+        EXPECT_TRUE(lcd_text_layer_->can_use_lcd_text());
+        EXPECT_TRUE(regular_text_layer_->can_use_lcd_text());
+        // Both layers must be painted.
+        EXPECT_EQ(1, lcd_text_client_->paint_count());
+        EXPECT_EQ(1, regular_text_client_->paint_count());
+        // LCD text must have been allowed on both layers.
+        EXPECT_TRUE(lcd_text_client_->could_paint_lcd_text_last_frame());
+        EXPECT_TRUE(regular_text_client_->could_paint_lcd_text_last_frame());
         PostSetNeedsCommitToMainThread();
         break;
       case 2:
-        // Since nothing changed on layer, there should be no notification
-        // or paint on the second update.
-        EXPECT_EQ(1, client_.lcd_notification_count());
-        EXPECT_EQ(1, client_.paint_count());
-        // LCD text must not have changed.
-        EXPECT_TRUE(layer_tree_host()->root_layer()->can_use_lcd_text());
-        // Change layer opacity that should trigger lcd notification.
-        layer_tree_host()->root_layer()->SetOpacity(.5f);
+        // Since nothing changed on any of the layers,
+        // everything should remain the same and they should not be repainted.
+        EXPECT_TRUE(lcd_text_layer_->can_use_lcd_text());
+        EXPECT_TRUE(regular_text_layer_->can_use_lcd_text());
+        EXPECT_EQ(1, lcd_text_client_->paint_count());
+        EXPECT_EQ(1, regular_text_client_->paint_count());
+        // Change layer opacity that should trigger lcd change.
+        lcd_text_layer_->SetOpacity(.5f);
+        regular_text_layer_->SetOpacity(.5f);
         // No need to request a commit - setting opacity will do it.
         break;
+      case 3:
+        // LCD text must have been disabled on layers due to opacity.
+        EXPECT_FALSE(lcd_text_layer_->can_use_lcd_text());
+        EXPECT_FALSE(regular_text_layer_->can_use_lcd_text());
+        // Layer with lcd text should have been repainted with LCD AA.
+        EXPECT_EQ(2, lcd_text_client_->paint_count());
+        EXPECT_FALSE(lcd_text_client_->could_paint_lcd_text_last_frame());
+        // Layer with regular text should not have been repainted.
+        EXPECT_EQ(1, regular_text_client_->paint_count());
+        // Reset layer opacity - making it possible to use LCD text again.
+        lcd_text_layer_->SetOpacity(1.f);
+        regular_text_layer_->SetOpacity(1.f);
+        break;
       default:
-        // Verify that there is not extra commit due to layer invalidation.
-        EXPECT_EQ(3, layer_tree_host()->source_frame_number());
-        // LCD notification count should have incremented due to
-        // change in layer opacity.
-        EXPECT_EQ(2, client_.lcd_notification_count());
-        // Paint count should be incremented due to invalidation.
-        EXPECT_EQ(2, client_.paint_count());
-        // LCD text must have been disabled on the layer due to opacity.
-        EXPECT_FALSE(layer_tree_host()->root_layer()->can_use_lcd_text());
+        // Verify that there is no extra commit due to layer invalidation.
+        EXPECT_EQ(4, layer_tree_host()->source_frame_number());
+        // LCD text is now allowed.
+        EXPECT_TRUE(lcd_text_layer_->can_use_lcd_text());
+        EXPECT_TRUE(regular_text_layer_->can_use_lcd_text());
+        // Although LCD text is allowed, it is not used.
+        // Once LCD is disabled, it cannot be switched back ON.
+        // So there should not be any invalidation or painting.
+        EXPECT_EQ(2, lcd_text_client_->paint_count());
+        EXPECT_EQ(1, regular_text_client_->paint_count());
         EndTest();
         break;
     }
   }
 
  private:
-  NotificationClient client_;
+  scoped_ptr<LCDTextClient> lcd_text_client_;
+  scoped_ptr<LCDTextClient> regular_text_client_;
+
+  scoped_refptr<Layer> lcd_text_layer_;
+  scoped_refptr<Layer> regular_text_layer_;
 };
 
-SINGLE_THREAD_TEST_F(LayerTreeHostTestLCDNotification);
+SINGLE_AND_MULTI_THREAD_TEST_F(LayerTreeHostTestLCDText);
 
 // Verify that the BeginFrame notification is used to initiate rendering.
 class LayerTreeHostTestBeginFrameNotification : public LayerTreeHostTest {
  public:
   virtual void InitializeSettings(LayerTreeSettings* settings) OVERRIDE {
     settings->begin_frame_scheduling_enabled = true;
   }
 
   virtual void BeginTest() OVERRIDE {
     // This will trigger a SetNeedsBeginFrame which will trigger a
@@ skipping 147 matching lines @@
  public:
   class SetBoundsClient : public ContentLayerClient {
    public:
     SetBoundsClient() : layer_(0) {}
 
     void set_layer(Layer* layer) { layer_ = layer; }
 
     virtual void PaintContents(
         SkCanvas* canvas,
         const gfx::Rect& clip,
+        bool can_paint_lcd_text,
         gfx::RectF* opaque,
         ContentLayerClient::GraphicsContextStatus gc_status) OVERRIDE {
       layer_->SetBounds(gfx::Size(2, 2));
     }
 
-    virtual void DidChangeLayerCanUseLCDText() OVERRIDE {}
+    virtual bool PaintsLCDText() const OVERRIDE { return false; }
 
     virtual bool FillsBoundsCompletely() const OVERRIDE { return false; }
 
    private:
     Layer* layer_;
   };
 
   LayerTreeHostTestChangeLayerPropertiesInPaintContents() : num_commits_(0) {}
 
   virtual void SetupTree() OVERRIDE {
@@ skipping 2436 matching lines @@
   const gfx::Size bounds_;
   FakeContentLayerClient client_;
   scoped_refptr<ContentLayerWithUpdateTracking> content_layer_;
   scoped_refptr<FakePictureLayer> picture_layer_;
   Layer* child_layer_;
 };
 
 MULTI_THREAD_TEST_F(LayerTreeHostTestContinuousPainting);
 
 }  // namespace cc