src/cc/layers/layer_impl_unittest.cc

   1 // Copyright 2011 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "cc/layers/layer_impl.h"
   6
   7 #include "cc/output/filter_operation.h"
   8 #include "cc/output/filter_operations.h"
   9 #include "cc/test/fake_impl_proxy.h"
  10 #include "cc/test/fake_layer_tree_host_impl.h"
  11 #include "cc/test/fake_output_surface.h"
  12 #include "cc/test/geometry_test_utils.h"
  13 #include "cc/trees/layer_tree_impl.h"
  14 #include "cc/trees/single_thread_proxy.h"
  15 #include "testing/gmock/include/gmock/gmock.h"
  16 #include "testing/gtest/include/gtest/gtest.h"
  17 #include "third_party/skia/include/effects/SkBlurImageFilter.h"
  18
  19 namespace cc {
  20 namespace {
  21
  22 #define EXECUTE_AND_VERIFY_SUBTREE_CHANGED(code_to_test)                       \
  23   root->ResetAllChangeTrackingForSubtree();                                    \
  24   code_to_test;                                                                \
  25   EXPECT_TRUE(root->LayerPropertyChanged());                                   \
  26   EXPECT_TRUE(child->LayerPropertyChanged());                                  \
  27   EXPECT_TRUE(grand_child->LayerPropertyChanged());
  28
  29 #define EXECUTE_AND_VERIFY_SUBTREE_DID_NOT_CHANGE(code_to_test)                \
  30   root->ResetAllChangeTrackingForSubtree();                                    \
  31   code_to_test;                                                                \
  32   EXPECT_FALSE(root->LayerPropertyChanged());                                  \
  33   EXPECT_FALSE(child->LayerPropertyChanged());                                 \
  34   EXPECT_FALSE(grand_child->LayerPropertyChanged());
  35
  36 #define EXECUTE_AND_VERIFY_ONLY_LAYER_CHANGED(code_to_test)                    \
  37   root->ResetAllChangeTrackingForSubtree();                                    \
  38   code_to_test;                                                                \
  39   EXPECT_TRUE(root->LayerPropertyChanged());                                   \
  40   EXPECT_FALSE(child->LayerPropertyChanged());                                 \
  41   EXPECT_FALSE(grand_child->LayerPropertyChanged());
  42
  43 #define VERIFY_NEEDS_UPDATE_DRAW_PROPERTIES(code_to_test)                      \
  44   root->ResetAllChangeTrackingForSubtree();                                    \
  45   host_impl.ForcePrepareToDraw();                                              \
  46   EXPECT_FALSE(host_impl.active_tree()->needs_update_draw_properties());       \
  47   code_to_test;                                                                \
  48   EXPECT_TRUE(host_impl.active_tree()->needs_update_draw_properties());
  49
  50 #define VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(code_to_test)                   \
  51   root->ResetAllChangeTrackingForSubtree();                                    \
  52   host_impl.ForcePrepareToDraw();                                              \
  53   EXPECT_FALSE(host_impl.active_tree()->needs_update_draw_properties());       \
  54   code_to_test;                                                                \
  55   EXPECT_FALSE(host_impl.active_tree()->needs_update_draw_properties());
  56
  57 TEST(LayerImplTest, VerifyLayerChangesAreTrackedProperly) {
  58   //
  59   // This test checks that layerPropertyChanged() has the correct behavior.
  60   //
  61
  62   // The constructor on this will fake that we are on the correct thread.
  63   // Create a simple LayerImpl tree:
  64   FakeImplProxy proxy;
  65   FakeLayerTreeHostImpl host_impl(&proxy);
  66   EXPECT_TRUE(host_impl.InitializeRenderer(CreateFakeOutputSurface()));
  67   scoped_ptr<LayerImpl> root = LayerImpl::Create(host_impl.active_tree(), 1);
  68   root->AddChild(LayerImpl::Create(host_impl.active_tree(), 2));
  69   LayerImpl* child = root->children()[0];
  70   child->AddChild(LayerImpl::Create(host_impl.active_tree(), 3));
  71   LayerImpl* grand_child = child->children()[0];
  72
  73   root->SetScrollable(true);
  74
  75   // Adding children is an internal operation and should not mark layers as
  76   // changed.
  77   EXPECT_FALSE(root->LayerPropertyChanged());
  78   EXPECT_FALSE(child->LayerPropertyChanged());
  79   EXPECT_FALSE(grand_child->LayerPropertyChanged());
  80
  81   gfx::PointF arbitrary_point_f = gfx::PointF(0.125f, 0.25f);
  82   float arbitrary_number = 0.352f;
  83   gfx::Size arbitrary_size = gfx::Size(111, 222);
  84   gfx::Point arbitrary_point = gfx::Point(333, 444);
  85   gfx::Vector2d arbitrary_vector2d = gfx::Vector2d(111, 222);
  86   gfx::Rect arbitrary_rect = gfx::Rect(arbitrary_point, arbitrary_size);
  87   gfx::RectF arbitrary_rect_f =
  88       gfx::RectF(arbitrary_point_f, gfx::SizeF(1.234f, 5.678f));
  89   SkColor arbitrary_color = SkColorSetRGB(10, 20, 30);
  90   gfx::Transform arbitrary_transform;
  91   arbitrary_transform.Scale3d(0.1f, 0.2f, 0.3f);
  92   FilterOperations arbitrary_filters;
  93   arbitrary_filters.Append(FilterOperation::CreateOpacityFilter(0.5f));
  94
  95   // These properties are internal, and should not be considered "change" when
  96   // they are used.
  97   EXECUTE_AND_VERIFY_SUBTREE_DID_NOT_CHANGE(
  98       root->set_update_rect(arbitrary_rect_f));
  99   EXECUTE_AND_VERIFY_SUBTREE_DID_NOT_CHANGE(
 100       root->SetMaxScrollOffset(arbitrary_vector2d));
 101
 102   // Changing these properties affects the entire subtree of layers.
 103   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->SetAnchorPoint(arbitrary_point_f));
 104   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->SetAnchorPointZ(arbitrary_number));
 105   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->SetFilters(arbitrary_filters));
 106   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->SetFilters(FilterOperations()));
 107   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(
 108       root->SetMaskLayer(LayerImpl::Create(host_impl.active_tree(), 4)));
 109   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->SetMasksToBounds(true));
 110   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->SetContentsOpaque(true));
 111   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(
 112       root->SetReplicaLayer(LayerImpl::Create(host_impl.active_tree(), 5)));
 113   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->SetPosition(arbitrary_point_f));
 114   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->SetPreserves3d(true));
 115   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(
 116       root->SetDoubleSided(false));  // constructor initializes it to "true".
 117   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->ScrollBy(arbitrary_vector2d));
 118   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->SetScrollDelta(gfx::Vector2d()));
 119   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->SetScrollOffset(arbitrary_vector2d));
 120   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->SetHideLayerAndSubtree(true));
 121   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->SetOpacity(arbitrary_number));
 122   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->SetTransform(arbitrary_transform));
 123
 124   // Changing these properties only affects the layer itself.
 125   EXECUTE_AND_VERIFY_ONLY_LAYER_CHANGED(root->SetContentBounds(arbitrary_size));
 126   EXECUTE_AND_VERIFY_ONLY_LAYER_CHANGED(
 127       root->SetContentsScale(arbitrary_number, arbitrary_number));
 128   EXECUTE_AND_VERIFY_ONLY_LAYER_CHANGED(root->SetDrawsContent(true));
 129   EXECUTE_AND_VERIFY_ONLY_LAYER_CHANGED(
 130       root->SetBackgroundColor(arbitrary_color));
 131   EXECUTE_AND_VERIFY_ONLY_LAYER_CHANGED(
 132       root->SetBackgroundFilters(arbitrary_filters));
 133
 134   // Special case: check that sublayer transform changes all layer's
 135   // descendants, but not the layer itself.
 136   root->ResetAllChangeTrackingForSubtree();
 137   root->SetSublayerTransform(arbitrary_transform);
 138   EXPECT_FALSE(root->LayerPropertyChanged());
 139   EXPECT_TRUE(child->LayerPropertyChanged());
 140   EXPECT_TRUE(grand_child->LayerPropertyChanged());
 141
 142   // Special case: check that SetBounds changes behavior depending on
 143   // masksToBounds.
 144   root->SetMasksToBounds(false);
 145   EXECUTE_AND_VERIFY_ONLY_LAYER_CHANGED(root->SetBounds(gfx::Size(135, 246)));
 146   root->SetMasksToBounds(true);
 147   // Should be a different size than previous call, to ensure it marks tree
 148   // changed.
 149   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->SetBounds(arbitrary_size));
 150
 151   // After setting all these properties already, setting to the exact same
 152   // values again should not cause any change.
 153   EXECUTE_AND_VERIFY_SUBTREE_DID_NOT_CHANGE(
 154       root->SetAnchorPoint(arbitrary_point_f));
 155   EXECUTE_AND_VERIFY_SUBTREE_DID_NOT_CHANGE(
 156       root->SetAnchorPointZ(arbitrary_number));
 157   EXECUTE_AND_VERIFY_SUBTREE_DID_NOT_CHANGE(root->SetMasksToBounds(true));
 158   EXECUTE_AND_VERIFY_SUBTREE_DID_NOT_CHANGE(
 159       root->SetPosition(arbitrary_point_f));
 160   EXECUTE_AND_VERIFY_SUBTREE_DID_NOT_CHANGE(root->SetPreserves3d(true));
 161   EXECUTE_AND_VERIFY_SUBTREE_DID_NOT_CHANGE(
 162       root->SetTransform(arbitrary_transform));
 163   EXECUTE_AND_VERIFY_SUBTREE_DID_NOT_CHANGE(
 164       root->SetDoubleSided(false));  // constructor initializes it to "true".
 165   EXECUTE_AND_VERIFY_SUBTREE_DID_NOT_CHANGE(
 166       root->SetScrollDelta(gfx::Vector2d()));
 167   EXECUTE_AND_VERIFY_SUBTREE_DID_NOT_CHANGE(
 168       root->SetScrollOffset(arbitrary_vector2d));
 169   EXECUTE_AND_VERIFY_SUBTREE_DID_NOT_CHANGE(
 170       root->SetContentBounds(arbitrary_size));
 171   EXECUTE_AND_VERIFY_SUBTREE_DID_NOT_CHANGE(
 172       root->SetContentsScale(arbitrary_number, arbitrary_number));
 173   EXECUTE_AND_VERIFY_SUBTREE_DID_NOT_CHANGE(root->SetContentsOpaque(true));
 174   EXECUTE_AND_VERIFY_SUBTREE_DID_NOT_CHANGE(root->SetOpacity(arbitrary_number));
 175   EXECUTE_AND_VERIFY_SUBTREE_DID_NOT_CHANGE(root->SetDrawsContent(true));
 176   EXECUTE_AND_VERIFY_SUBTREE_DID_NOT_CHANGE(
 177       root->SetSublayerTransform(arbitrary_transform));
 178   EXECUTE_AND_VERIFY_SUBTREE_DID_NOT_CHANGE(root->SetBounds(arbitrary_size));
 179 }
 180
 181 TEST(LayerImplTest, VerifyNeedsUpdateDrawProperties) {
 182   FakeImplProxy proxy;
 183   FakeLayerTreeHostImpl host_impl(&proxy);
 184   EXPECT_TRUE(host_impl.InitializeRenderer(CreateFakeOutputSurface()));
 185   scoped_ptr<LayerImpl> root = LayerImpl::Create(host_impl.active_tree(), 1);
 186   root->SetScrollable(true);
 187
 188   gfx::PointF arbitrary_point_f = gfx::PointF(0.125f, 0.25f);
 189   float arbitrary_number = 0.352f;
 190   gfx::Size arbitrary_size = gfx::Size(111, 222);
 191   gfx::Point arbitrary_point = gfx::Point(333, 444);
 192   gfx::Vector2d arbitrary_vector2d = gfx::Vector2d(111, 222);
 193   gfx::Vector2d large_vector2d = gfx::Vector2d(1000, 1000);
 194   gfx::Rect arbitrary_rect = gfx::Rect(arbitrary_point, arbitrary_size);
 195   gfx::RectF arbitrary_rect_f =
 196       gfx::RectF(arbitrary_point_f, gfx::SizeF(1.234f, 5.678f));
 197   SkColor arbitrary_color = SkColorSetRGB(10, 20, 30);
 198   gfx::Transform arbitrary_transform;
 199   arbitrary_transform.Scale3d(0.1f, 0.2f, 0.3f);
 200   FilterOperations arbitrary_filters;
 201   arbitrary_filters.Append(FilterOperation::CreateOpacityFilter(0.5f));
 202
 203   // Related filter functions.
 204   VERIFY_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetFilters(arbitrary_filters));
 205   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetFilters(arbitrary_filters));
 206   VERIFY_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetFilters(FilterOperations()));
 207   VERIFY_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetFilters(arbitrary_filters));
 208
 209   // Related scrolling functions.
 210   VERIFY_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetMaxScrollOffset(large_vector2d));
 211   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(
 212       root->SetMaxScrollOffset(large_vector2d));
 213   VERIFY_NEEDS_UPDATE_DRAW_PROPERTIES(root->ScrollBy(arbitrary_vector2d));
 214   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(root->ScrollBy(gfx::Vector2d()));
 215   root->SetScrollDelta(gfx::Vector2d(0, 0));
 216   host_impl.ForcePrepareToDraw();
 217   VERIFY_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetScrollDelta(arbitrary_vector2d));
 218   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(
 219       root->SetScrollDelta(arbitrary_vector2d));
 220   VERIFY_NEEDS_UPDATE_DRAW_PROPERTIES(
 221       root->SetScrollOffset(arbitrary_vector2d));
 222   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(
 223       root->SetScrollOffset(arbitrary_vector2d));
 224
 225   // Unrelated functions, always set to new values, always set needs update.
 226   VERIFY_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetAnchorPointZ(arbitrary_number));
 227   VERIFY_NEEDS_UPDATE_DRAW_PROPERTIES(
 228       root->SetMaskLayer(LayerImpl::Create(host_impl.active_tree(), 4)));
 229   VERIFY_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetMasksToBounds(true));
 230   VERIFY_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetContentsOpaque(true));
 231   VERIFY_NEEDS_UPDATE_DRAW_PROPERTIES(
 232       root->SetReplicaLayer(LayerImpl::Create(host_impl.active_tree(), 5)));
 233   VERIFY_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetPosition(arbitrary_point_f));
 234   VERIFY_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetPreserves3d(true));
 235   VERIFY_NEEDS_UPDATE_DRAW_PROPERTIES(
 236       root->SetDoubleSided(false));  // constructor initializes it to "true".
 237   VERIFY_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetContentBounds(arbitrary_size));
 238   VERIFY_NEEDS_UPDATE_DRAW_PROPERTIES(
 239       root->SetContentsScale(arbitrary_number, arbitrary_number));
 240   VERIFY_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetDrawsContent(true));
 241   VERIFY_NEEDS_UPDATE_DRAW_PROPERTIES(
 242       root->SetBackgroundColor(arbitrary_color));
 243   VERIFY_NEEDS_UPDATE_DRAW_PROPERTIES(
 244       root->SetBackgroundFilters(arbitrary_filters));
 245   VERIFY_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetOpacity(arbitrary_number));
 246   VERIFY_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetTransform(arbitrary_transform));
 247   VERIFY_NEEDS_UPDATE_DRAW_PROPERTIES(
 248       root->SetSublayerTransform(arbitrary_transform));
 249   VERIFY_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetBounds(arbitrary_size));
 250
 251   // Unrelated functions, set to the same values, no needs update.
 252   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(
 253       root->SetAnchorPointZ(arbitrary_number));
 254   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetFilters(arbitrary_filters));
 255   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetMasksToBounds(true));
 256   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetContentsOpaque(true));
 257   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetPosition(arbitrary_point_f));
 258   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetPreserves3d(true));
 259   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(
 260       root->SetDoubleSided(false));  // constructor initializes it to "true".
 261   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(
 262       root->SetContentBounds(arbitrary_size));
 263   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(
 264       root->SetContentsScale(arbitrary_number, arbitrary_number));
 265   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetDrawsContent(true));
 266   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(
 267       root->SetBackgroundColor(arbitrary_color));
 268   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(
 269       root->SetBackgroundFilters(arbitrary_filters));
 270   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetOpacity(arbitrary_number));
 271   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(
 272       root->SetTransform(arbitrary_transform));
 273   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(
 274       root->SetSublayerTransform(arbitrary_transform));
 275   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetBounds(arbitrary_size));
 276 }
 277
 278 TEST(LayerImplTest, SafeOpaqueBackgroundColor) {
 279   FakeImplProxy proxy;
 280   FakeLayerTreeHostImpl host_impl(&proxy);
 281   EXPECT_TRUE(host_impl.InitializeRenderer(CreateFakeOutputSurface()));
 282   scoped_ptr<LayerImpl> layer = LayerImpl::Create(host_impl.active_tree(), 1);
 283
 284   for (int contents_opaque = 0; contents_opaque < 2; ++contents_opaque) {
 285     for (int layer_opaque = 0; layer_opaque < 2; ++layer_opaque) {
 286       for (int host_opaque = 0; host_opaque < 2; ++host_opaque) {
 287         layer->SetContentsOpaque(!!contents_opaque);
 288         layer->SetBackgroundColor(layer_opaque ? SK_ColorRED
 289                                                : SK_ColorTRANSPARENT);
 290         host_impl.active_tree()->set_background_color(
 291             host_opaque ? SK_ColorRED : SK_ColorTRANSPARENT);
 292
 293         SkColor safe_color = layer->SafeOpaqueBackgroundColor();
 294         if (contents_opaque) {
 295           EXPECT_EQ(SkColorGetA(safe_color), 255u)
 296               << "Flags: " << contents_opaque << ", " << layer_opaque << ", "
 297               << host_opaque << "\n";
 298         } else {
 299           EXPECT_NE(SkColorGetA(safe_color), 255u)
 300               << "Flags: " << contents_opaque << ", " << layer_opaque << ", "
 301               << host_opaque << "\n";
 302         }
 303       }
 304     }
 305   }
 306 }
 307
 308 class LayerImplScrollTest : public testing::Test {
 309  public:
 310   LayerImplScrollTest() : host_impl_(&proxy_), root_id_(7) {
 311     host_impl_.active_tree()
 312         ->SetRootLayer(LayerImpl::Create(host_impl_.active_tree(), root_id_));
 313     host_impl_.active_tree()->root_layer()->SetScrollable(true);
 314   }
 315
 316   LayerImpl* layer() { return host_impl_.active_tree()->root_layer(); }
 317
 318  private:
 319   FakeImplProxy proxy_;
 320   FakeLayerTreeHostImpl host_impl_;
 321   int root_id_;
 322 };
 323
 324 TEST_F(LayerImplScrollTest, ScrollByWithZeroOffset) {
 325   // Test that LayerImpl::ScrollBy only affects ScrollDelta and total scroll
 326   // offset is bounded by the range [0, max scroll offset].
 327   gfx::Vector2d max_scroll_offset(50, 80);
 328   layer()->SetMaxScrollOffset(max_scroll_offset);
 329
 330   EXPECT_VECTOR_EQ(gfx::Vector2dF(), layer()->TotalScrollOffset());
 331   EXPECT_VECTOR_EQ(gfx::Vector2dF(), layer()->scroll_offset());
 332   EXPECT_VECTOR_EQ(gfx::Vector2dF(), layer()->ScrollDelta());
 333
 334   layer()->ScrollBy(gfx::Vector2dF(-100, 100));
 335   EXPECT_VECTOR_EQ(gfx::Vector2dF(0, 80), layer()->TotalScrollOffset());
 336
 337   EXPECT_VECTOR_EQ(layer()->ScrollDelta(), layer()->TotalScrollOffset());
 338   EXPECT_VECTOR_EQ(gfx::Vector2dF(), layer()->scroll_offset());
 339
 340   layer()->ScrollBy(gfx::Vector2dF(100, -100));
 341   EXPECT_VECTOR_EQ(gfx::Vector2dF(50, 0), layer()->TotalScrollOffset());
 342
 343   EXPECT_VECTOR_EQ(layer()->ScrollDelta(), layer()->TotalScrollOffset());
 344   EXPECT_VECTOR_EQ(gfx::Vector2dF(), layer()->scroll_offset());
 345 }
 346
 347 TEST_F(LayerImplScrollTest, ScrollByWithNonZeroOffset) {
 348   gfx::Vector2d max_scroll_offset(50, 80);
 349   gfx::Vector2d scroll_offset(10, 5);
 350   layer()->SetMaxScrollOffset(max_scroll_offset);
 351   layer()->SetScrollOffset(scroll_offset);
 352
 353   EXPECT_VECTOR_EQ(scroll_offset, layer()->TotalScrollOffset());
 354   EXPECT_VECTOR_EQ(scroll_offset, layer()->scroll_offset());
 355   EXPECT_VECTOR_EQ(gfx::Vector2dF(), layer()->ScrollDelta());
 356
 357   layer()->ScrollBy(gfx::Vector2dF(-100, 100));
 358   EXPECT_VECTOR_EQ(gfx::Vector2dF(0, 80), layer()->TotalScrollOffset());
 359
 360   EXPECT_VECTOR_EQ(layer()->ScrollDelta() + scroll_offset,
 361                    layer()->TotalScrollOffset());
 362   EXPECT_VECTOR_EQ(scroll_offset, layer()->scroll_offset());
 363
 364   layer()->ScrollBy(gfx::Vector2dF(100, -100));
 365   EXPECT_VECTOR_EQ(gfx::Vector2dF(50, 0), layer()->TotalScrollOffset());
 366
 367   EXPECT_VECTOR_EQ(layer()->ScrollDelta() + scroll_offset,
 368                    layer()->TotalScrollOffset());
 369   EXPECT_VECTOR_EQ(scroll_offset, layer()->scroll_offset());
 370 }
 371
 372 class ScrollDelegateIgnore : public LayerScrollOffsetDelegate {
 373  public:
 374   virtual void SetMaxScrollOffset(gfx::Vector2dF max_scroll_offset) OVERRIDE {}
 375   virtual void SetTotalScrollOffset(gfx::Vector2dF new_value) OVERRIDE {}
 376   virtual gfx::Vector2dF GetTotalScrollOffset() OVERRIDE {
 377     return fixed_offset_;
 378   }
 379   virtual bool IsExternalFlingActive() const OVERRIDE { return false; }
 380
 381   void set_fixed_offset(gfx::Vector2dF fixed_offset) {
 382     fixed_offset_ = fixed_offset;
 383   }
 384
 385   virtual void SetTotalPageScaleFactor(float page_scale_factor) OVERRIDE {}
 386   virtual void SetScrollableSize(gfx::SizeF scrollable_size) OVERRIDE {}
 387
 388  private:
 389   gfx::Vector2dF fixed_offset_;
 390 };
 391
 392 TEST_F(LayerImplScrollTest, ScrollByWithIgnoringDelegate) {
 393   gfx::Vector2d max_scroll_offset(50, 80);
 394   gfx::Vector2d scroll_offset(10, 5);
 395   layer()->SetMaxScrollOffset(max_scroll_offset);
 396   layer()->SetScrollOffset(scroll_offset);
 397
 398   EXPECT_VECTOR_EQ(scroll_offset, layer()->TotalScrollOffset());
 399   EXPECT_VECTOR_EQ(scroll_offset, layer()->scroll_offset());
 400   EXPECT_VECTOR_EQ(gfx::Vector2dF(), layer()->ScrollDelta());
 401
 402   ScrollDelegateIgnore delegate;
 403   gfx::Vector2dF fixed_offset(32, 12);
 404   delegate.set_fixed_offset(fixed_offset);
 405   layer()->SetScrollOffsetDelegate(&delegate);
 406
 407   EXPECT_VECTOR_EQ(fixed_offset, layer()->TotalScrollOffset());
 408   EXPECT_VECTOR_EQ(scroll_offset, layer()->scroll_offset());
 409
 410   layer()->ScrollBy(gfx::Vector2dF(-100, 100));
 411
 412   EXPECT_VECTOR_EQ(fixed_offset, layer()->TotalScrollOffset());
 413   EXPECT_VECTOR_EQ(scroll_offset, layer()->scroll_offset());
 414
 415   layer()->SetScrollOffsetDelegate(NULL);
 416
 417   EXPECT_VECTOR_EQ(fixed_offset, layer()->TotalScrollOffset());
 418   EXPECT_VECTOR_EQ(scroll_offset, layer()->scroll_offset());
 419
 420   gfx::Vector2dF scroll_delta(1, 1);
 421   layer()->ScrollBy(scroll_delta);
 422
 423   EXPECT_VECTOR_EQ(fixed_offset + scroll_delta, layer()->TotalScrollOffset());
 424   EXPECT_VECTOR_EQ(scroll_offset, layer()->scroll_offset());
 425 }
 426
 427 class ScrollDelegateAccept : public LayerScrollOffsetDelegate {
 428  public:
 429   virtual void SetMaxScrollOffset(gfx::Vector2dF max_scroll_offset) OVERRIDE {}
 430   virtual void SetTotalScrollOffset(gfx::Vector2dF new_value) OVERRIDE {
 431     current_offset_ = new_value;
 432   }
 433   virtual gfx::Vector2dF GetTotalScrollOffset() OVERRIDE {
 434     return current_offset_;
 435   }
 436   virtual bool IsExternalFlingActive() const OVERRIDE { return false; }
 437   virtual void SetTotalPageScaleFactor(float page_scale_factor) OVERRIDE {}
 438   virtual void SetScrollableSize(gfx::SizeF scrollable_size) OVERRIDE {}
 439
 440  private:
 441   gfx::Vector2dF current_offset_;
 442 };
 443
 444 TEST_F(LayerImplScrollTest, ScrollByWithAcceptingDelegate) {
 445   gfx::Vector2d max_scroll_offset(50, 80);
 446   gfx::Vector2d scroll_offset(10, 5);
 447   layer()->SetMaxScrollOffset(max_scroll_offset);
 448   layer()->SetScrollOffset(scroll_offset);
 449
 450   EXPECT_VECTOR_EQ(scroll_offset, layer()->TotalScrollOffset());
 451   EXPECT_VECTOR_EQ(scroll_offset, layer()->scroll_offset());
 452   EXPECT_VECTOR_EQ(gfx::Vector2dF(), layer()->ScrollDelta());
 453
 454   ScrollDelegateAccept delegate;
 455   layer()->SetScrollOffsetDelegate(&delegate);
 456
 457   EXPECT_VECTOR_EQ(scroll_offset, layer()->TotalScrollOffset());
 458   EXPECT_VECTOR_EQ(scroll_offset, layer()->scroll_offset());
 459   EXPECT_VECTOR_EQ(gfx::Vector2dF(), layer()->ScrollDelta());
 460
 461   layer()->ScrollBy(gfx::Vector2dF(-100, 100));
 462
 463   EXPECT_VECTOR_EQ(gfx::Vector2dF(0, 80), layer()->TotalScrollOffset());
 464   EXPECT_VECTOR_EQ(scroll_offset, layer()->scroll_offset());
 465
 466   layer()->SetScrollOffsetDelegate(NULL);
 467
 468   EXPECT_VECTOR_EQ(gfx::Vector2dF(0, 80), layer()->TotalScrollOffset());
 469   EXPECT_VECTOR_EQ(scroll_offset, layer()->scroll_offset());
 470
 471   gfx::Vector2dF scroll_delta(1, 1);
 472   layer()->ScrollBy(scroll_delta);
 473
 474   EXPECT_VECTOR_EQ(gfx::Vector2dF(1, 80), layer()->TotalScrollOffset());
 475   EXPECT_VECTOR_EQ(scroll_offset, layer()->scroll_offset());
 476 }
 477
 478 TEST_F(LayerImplScrollTest, ApplySentScrollsNoDelegate) {
 479   gfx::Vector2d max_scroll_offset(50, 80);
 480   gfx::Vector2d scroll_offset(10, 5);
 481   gfx::Vector2dF scroll_delta(20.5f, 8.5f);
 482   gfx::Vector2d sent_scroll_delta(12, -3);
 483
 484   layer()->SetMaxScrollOffset(max_scroll_offset);
 485   layer()->SetScrollOffset(scroll_offset);
 486   layer()->ScrollBy(scroll_delta);
 487   layer()->SetSentScrollDelta(sent_scroll_delta);
 488
 489   EXPECT_VECTOR_EQ(scroll_offset + scroll_delta, layer()->TotalScrollOffset());
 490   EXPECT_VECTOR_EQ(scroll_delta, layer()->ScrollDelta());
 491   EXPECT_VECTOR_EQ(scroll_offset, layer()->scroll_offset());
 492   EXPECT_VECTOR_EQ(sent_scroll_delta, layer()->sent_scroll_delta());
 493
 494   layer()->ApplySentScrollDeltasFromAbortedCommit();
 495
 496   EXPECT_VECTOR_EQ(scroll_offset + scroll_delta, layer()->TotalScrollOffset());
 497   EXPECT_VECTOR_EQ(scroll_delta - sent_scroll_delta, layer()->ScrollDelta());
 498   EXPECT_VECTOR_EQ(scroll_offset + sent_scroll_delta, layer()->scroll_offset());
 499   EXPECT_VECTOR_EQ(gfx::Vector2d(), layer()->sent_scroll_delta());
 500 }
 501
 502 TEST_F(LayerImplScrollTest, ApplySentScrollsWithIgnoringDelegate) {
 503   gfx::Vector2d max_scroll_offset(50, 80);
 504   gfx::Vector2d scroll_offset(10, 5);
 505   gfx::Vector2d sent_scroll_delta(12, -3);
 506   gfx::Vector2dF fixed_offset(32, 12);
 507
 508   layer()->SetMaxScrollOffset(max_scroll_offset);
 509   layer()->SetScrollOffset(scroll_offset);
 510   ScrollDelegateIgnore delegate;
 511   delegate.set_fixed_offset(fixed_offset);
 512   layer()->SetScrollOffsetDelegate(&delegate);
 513   layer()->SetSentScrollDelta(sent_scroll_delta);
 514
 515   EXPECT_VECTOR_EQ(fixed_offset, layer()->TotalScrollOffset());
 516   EXPECT_VECTOR_EQ(scroll_offset, layer()->scroll_offset());
 517   EXPECT_VECTOR_EQ(sent_scroll_delta, layer()->sent_scroll_delta());
 518
 519   layer()->ApplySentScrollDeltasFromAbortedCommit();
 520
 521   EXPECT_VECTOR_EQ(fixed_offset, layer()->TotalScrollOffset());
 522   EXPECT_VECTOR_EQ(scroll_offset + sent_scroll_delta, layer()->scroll_offset());
 523   EXPECT_VECTOR_EQ(gfx::Vector2d(), layer()->sent_scroll_delta());
 524 }
 525
 526 TEST_F(LayerImplScrollTest, ApplySentScrollsWithAcceptingDelegate) {
 527   gfx::Vector2d max_scroll_offset(50, 80);
 528   gfx::Vector2d scroll_offset(10, 5);
 529   gfx::Vector2d sent_scroll_delta(12, -3);
 530   gfx::Vector2dF scroll_delta(20.5f, 8.5f);
 531
 532   layer()->SetMaxScrollOffset(max_scroll_offset);
 533   layer()->SetScrollOffset(scroll_offset);
 534   ScrollDelegateAccept delegate;
 535   layer()->SetScrollOffsetDelegate(&delegate);
 536   layer()->ScrollBy(scroll_delta);
 537   layer()->SetSentScrollDelta(sent_scroll_delta);
 538
 539   EXPECT_VECTOR_EQ(scroll_offset + scroll_delta, layer()->TotalScrollOffset());
 540   EXPECT_VECTOR_EQ(scroll_offset, layer()->scroll_offset());
 541   EXPECT_VECTOR_EQ(sent_scroll_delta, layer()->sent_scroll_delta());
 542
 543   layer()->ApplySentScrollDeltasFromAbortedCommit();
 544
 545   EXPECT_VECTOR_EQ(scroll_offset + scroll_delta, layer()->TotalScrollOffset());
 546   EXPECT_VECTOR_EQ(scroll_offset + sent_scroll_delta, layer()->scroll_offset());
 547   EXPECT_VECTOR_EQ(gfx::Vector2d(), layer()->sent_scroll_delta());
 548 }
 549
 550 TEST_F(LayerImplScrollTest, ScrollUserUnscrollableLayer) {
 551   gfx::Vector2d max_scroll_offset(50, 80);
 552   gfx::Vector2d scroll_offset(10, 5);
 553   gfx::Vector2dF scroll_delta(20.5f, 8.5f);
 554
 555   layer()->set_user_scrollable_vertical(false);
 556   layer()->SetMaxScrollOffset(max_scroll_offset);
 557   layer()->SetScrollOffset(scroll_offset);
 558   gfx::Vector2dF unscrolled = layer()->ScrollBy(scroll_delta);
 559
 560   EXPECT_VECTOR_EQ(gfx::Vector2dF(0, 8.5f), unscrolled);
 561   EXPECT_VECTOR_EQ(gfx::Vector2dF(30.5f, 5), layer()->TotalScrollOffset());
 562 }
 563
 564 }  // namespace
 565 }  // namespace cc