cc/layers/scrollbar_layer_unittest.cc

   1 // Copyright 2012 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 "base/containers/hash_tables.h"
   6 #include "cc/animation/scrollbar_animation_controller.h"
   7 #include "cc/layers/append_quads_data.h"
   8 #include "cc/layers/painted_scrollbar_layer.h"
   9 #include "cc/layers/painted_scrollbar_layer_impl.h"
  10 #include "cc/layers/scrollbar_layer_interface.h"
  11 #include "cc/layers/solid_color_scrollbar_layer.h"
  12 #include "cc/layers/solid_color_scrollbar_layer_impl.h"
  13 #include "cc/quads/solid_color_draw_quad.h"
  14 #include "cc/resources/resource_update_queue.h"
  15 #include "cc/test/fake_impl_proxy.h"
  16 #include "cc/test/fake_layer_tree_host.h"
  17 #include "cc/test/fake_layer_tree_host_client.h"
  18 #include "cc/test/fake_layer_tree_host_impl.h"
  19 #include "cc/test/fake_painted_scrollbar_layer.h"
  20 #include "cc/test/fake_scrollbar.h"
  21 #include "cc/test/geometry_test_utils.h"
  22 #include "cc/test/layer_tree_test.h"
  23 #include "cc/test/mock_quad_culler.h"
  24 #include "cc/test/test_web_graphics_context_3d.h"
  25 #include "cc/trees/layer_tree_host.h"
  26 #include "cc/trees/layer_tree_impl.h"
  27 #include "cc/trees/occlusion_tracker.h"
  28 #include "cc/trees/single_thread_proxy.h"
  29 #include "cc/trees/tree_synchronizer.h"
  30 #include "testing/gmock/include/gmock/gmock.h"
  31 #include "testing/gtest/include/gtest/gtest.h"
  32
  33 namespace cc {
  34 namespace {
  35
  36 LayerImpl* LayerImplForScrollAreaAndScrollbar(FakeLayerTreeHost* host,
  37                                               scoped_ptr<Scrollbar> scrollbar,
  38                                               bool reverse_order,
  39                                               bool use_solid_color_scrollbar,
  40                                               int thumb_thickness,
  41                                               int track_start) {
  42   scoped_refptr<Layer> layer_tree_root = Layer::Create();
  43   scoped_refptr<Layer> child1 = Layer::Create();
  44   scoped_refptr<Layer> child2;
  45   if (use_solid_color_scrollbar) {
  46     const bool kIsLeftSideVerticalScrollbar = false;
  47     child2 = SolidColorScrollbarLayer::Create(scrollbar->Orientation(),
  48                                               thumb_thickness,
  49                                               track_start,
  50                                               kIsLeftSideVerticalScrollbar,
  51                                               child1->id());
  52   } else {
  53     child2 = PaintedScrollbarLayer::Create(scrollbar.Pass(), child1->id());
  54   }
  55   child2->ToScrollbarLayer()->SetClipLayer(layer_tree_root->id());
  56   layer_tree_root->AddChild(child1);
  57   layer_tree_root->InsertChild(child2, reverse_order ? 0 : 1);
  58   host->SetRootLayer(layer_tree_root);
  59   return host->CommitAndCreateLayerImplTree();
  60 }
  61
  62 TEST(ScrollbarLayerTest, ResolveScrollLayerPointer) {
  63   scoped_ptr<FakeLayerTreeHost> host = FakeLayerTreeHost::Create();
  64   scoped_ptr<Scrollbar> scrollbar(new FakeScrollbar);
  65   LayerImpl* layer_impl_tree_root = LayerImplForScrollAreaAndScrollbar(
  66       host.get(), scrollbar.Pass(), false, false, 0, 0);
  67
  68   LayerImpl* cc_child1 = layer_impl_tree_root->children()[0];
  69   PaintedScrollbarLayerImpl* cc_child2 =
  70       static_cast<PaintedScrollbarLayerImpl*>(
  71           layer_impl_tree_root->children()[1]);
  72
  73   EXPECT_EQ(cc_child1->scrollbars()->size(), 1UL);
  74   EXPECT_EQ(*(cc_child1->scrollbars()->begin()), cc_child2);
  75 }
  76
  77 TEST(ScrollbarLayerTest, ResolveScrollLayerPointer_ReverseOrder) {
  78   scoped_ptr<FakeLayerTreeHost> host = FakeLayerTreeHost::Create();
  79   scoped_ptr<Scrollbar> scrollbar(new FakeScrollbar);
  80   LayerImpl* layer_impl_tree_root = LayerImplForScrollAreaAndScrollbar(
  81       host.get(), scrollbar.Pass(), true, false, 0, 0);
  82
  83   PaintedScrollbarLayerImpl* cc_child1 =
  84       static_cast<PaintedScrollbarLayerImpl*>(
  85           layer_impl_tree_root->children()[0]);
  86   LayerImpl* cc_child2 = layer_impl_tree_root->children()[1];
  87
  88   EXPECT_EQ(cc_child2->scrollbars()->size(), 1UL);
  89   EXPECT_EQ(*(cc_child2->scrollbars()->begin()), cc_child1);
  90 }
  91
  92 TEST(ScrollbarLayerTest, ShouldScrollNonOverlayOnMainThread) {
  93   scoped_ptr<FakeLayerTreeHost> host = FakeLayerTreeHost::Create();
  94
  95   // Create and attach a non-overlay scrollbar.
  96   scoped_ptr<Scrollbar> scrollbar(new FakeScrollbar);
  97   LayerImpl* layer_impl_tree_root = LayerImplForScrollAreaAndScrollbar(
  98       host.get(), scrollbar.Pass(), false, false, 0, 0);
  99   PaintedScrollbarLayerImpl* scrollbar_layer_impl =
 100       static_cast<PaintedScrollbarLayerImpl*>(
 101           layer_impl_tree_root->children()[1]);
 102
 103   // When the scrollbar is not an overlay scrollbar, the scroll should be
 104   // responded to on the main thread as the compositor does not yet implement
 105   // scrollbar scrolling.
 106   EXPECT_EQ(InputHandler::ScrollOnMainThread,
 107             scrollbar_layer_impl->TryScroll(gfx::Point(0, 0),
 108                                             InputHandler::Gesture));
 109
 110   // Create and attach an overlay scrollbar.
 111   scrollbar.reset(new FakeScrollbar(false, false, true));
 112
 113   layer_impl_tree_root = LayerImplForScrollAreaAndScrollbar(
 114       host.get(), scrollbar.Pass(), false, false, 0, 0);
 115   scrollbar_layer_impl = static_cast<PaintedScrollbarLayerImpl*>(
 116       layer_impl_tree_root->children()[1]);
 117
 118   // The user shouldn't be able to drag an overlay scrollbar and the scroll
 119   // may be handled in the compositor.
 120   EXPECT_EQ(InputHandler::ScrollIgnored,
 121             scrollbar_layer_impl->TryScroll(gfx::Point(0, 0),
 122                                             InputHandler::Gesture));
 123 }
 124
 125 TEST(PaintedScrollbarLayerTest, ScrollOffsetSynchronization) {
 126   scoped_ptr<FakeLayerTreeHost> host = FakeLayerTreeHost::Create();
 127
 128   scoped_ptr<Scrollbar> scrollbar(new FakeScrollbar);
 129   scoped_refptr<Layer> layer_tree_root = Layer::Create();
 130   scoped_refptr<Layer> scroll_layer = Layer::Create();
 131   scoped_refptr<Layer> content_layer = Layer::Create();
 132   scoped_refptr<Layer> scrollbar_layer =
 133       PaintedScrollbarLayer::Create(scrollbar.Pass(), layer_tree_root->id());
 134
 135   // Choose bounds to give max_scroll_offset = (30, 50).
 136   layer_tree_root->SetBounds(gfx::Size(70, 150));
 137   scroll_layer->SetScrollClipLayerId(layer_tree_root->id());
 138   scroll_layer->SetScrollOffset(gfx::Vector2d(10, 20));
 139   scroll_layer->SetBounds(gfx::Size(100, 200));
 140   content_layer->SetBounds(gfx::Size(100, 200));
 141
 142   host->SetRootLayer(layer_tree_root);
 143   layer_tree_root->AddChild(scroll_layer);
 144   scroll_layer->AddChild(content_layer);
 145   layer_tree_root->AddChild(scrollbar_layer);
 146   scrollbar_layer->ToScrollbarLayer()->SetScrollLayer(scroll_layer->id());
 147   scrollbar_layer->ToScrollbarLayer()->SetClipLayer(layer_tree_root->id());
 148
 149   layer_tree_root->SavePaintProperties();
 150   content_layer->SavePaintProperties();
 151
 152   LayerImpl* layer_impl_tree_root = host->CommitAndCreateLayerImplTree();
 153
 154   ScrollbarLayerImplBase* cc_scrollbar_layer =
 155       static_cast<PaintedScrollbarLayerImpl*>(
 156           layer_impl_tree_root->children()[1]);
 157
 158   EXPECT_EQ(10.f, cc_scrollbar_layer->current_pos());
 159   EXPECT_EQ(30, cc_scrollbar_layer->maximum());
 160
 161   layer_tree_root->SetBounds(gfx::Size(700, 1500));
 162   layer_tree_root->SavePaintProperties();
 163   scroll_layer->SetBounds(gfx::Size(1000, 2000));
 164   scroll_layer->SetScrollOffset(gfx::Vector2d(100, 200));
 165   scroll_layer->SavePaintProperties();
 166   content_layer->SetBounds(gfx::Size(1000, 2000));
 167   content_layer->SavePaintProperties();
 168
 169   ScrollbarAnimationController* scrollbar_controller =
 170       layer_impl_tree_root->scrollbar_animation_controller();
 171   layer_impl_tree_root = host->CommitAndCreateLayerImplTree();
 172   EXPECT_EQ(scrollbar_controller,
 173             layer_impl_tree_root->scrollbar_animation_controller());
 174
 175   EXPECT_EQ(100.f, cc_scrollbar_layer->current_pos());
 176   EXPECT_EQ(300, cc_scrollbar_layer->maximum());
 177
 178   LayerImpl* scroll_layer_impl = layer_impl_tree_root->children()[0];
 179   scroll_layer_impl->ScrollBy(gfx::Vector2d(12, 34));
 180
 181   EXPECT_EQ(112.f, cc_scrollbar_layer->current_pos());
 182   EXPECT_EQ(300, cc_scrollbar_layer->maximum());
 183 }
 184
 185 #define UPDATE_AND_EXTRACT_LAYER_POINTERS()                         \
 186   do {                                                              \
 187     scrollbar_layer->UpdateThumbAndTrackGeometry();                 \
 188     root_clip_layer_impl = host->CommitAndCreateLayerImplTree();    \
 189     root_layer_impl = root_clip_layer_impl->children()[0];          \
 190     scrollbar_layer_impl = static_cast<PaintedScrollbarLayerImpl*>( \
 191         root_layer_impl->children()[1]);                            \
 192     scrollbar_layer_impl->ScrollbarParametersDidChange();           \
 193   } while (false)
 194
 195 TEST(ScrollbarLayerTest, ThumbRect) {
 196   scoped_ptr<FakeLayerTreeHost> host = FakeLayerTreeHost::Create();
 197   scoped_refptr<Layer> root_clip_layer = Layer::Create();
 198   scoped_refptr<Layer> root_layer = Layer::Create();
 199   scoped_refptr<Layer> content_layer = Layer::Create();
 200   scoped_refptr<FakePaintedScrollbarLayer> scrollbar_layer =
 201       FakePaintedScrollbarLayer::Create(false, true, root_layer->id());
 202
 203   root_layer->SetScrollClipLayerId(root_clip_layer->id());
 204   // Give the root-clip a size that will result in MaxScrollOffset = (80, 0).
 205   root_clip_layer->SetBounds(gfx::Size(20, 50));
 206   root_layer->SetBounds(gfx::Size(100, 50));
 207   content_layer->SetBounds(gfx::Size(100, 50));
 208
 209   host->SetRootLayer(root_clip_layer);
 210   root_clip_layer->AddChild(root_layer);
 211   root_layer->AddChild(content_layer);
 212   root_layer->AddChild(scrollbar_layer);
 213
 214   root_layer->SetScrollOffset(gfx::Vector2d(0, 0));
 215   scrollbar_layer->SetBounds(gfx::Size(70, 10));
 216   scrollbar_layer->SetScrollLayer(root_layer->id());
 217   scrollbar_layer->SetClipLayer(root_clip_layer->id());
 218   scrollbar_layer->fake_scrollbar()->set_location(gfx::Point(20, 10));
 219   scrollbar_layer->fake_scrollbar()->set_track_rect(gfx::Rect(30, 10, 50, 10));
 220   scrollbar_layer->fake_scrollbar()->set_thumb_thickness(10);
 221   scrollbar_layer->fake_scrollbar()->set_thumb_length(4);
 222   scrollbar_layer->UpdateThumbAndTrackGeometry();
 223   LayerImpl* root_clip_layer_impl = NULL;
 224   LayerImpl* root_layer_impl = NULL;
 225   PaintedScrollbarLayerImpl* scrollbar_layer_impl = NULL;
 226
 227   // Thumb is at the edge of the scrollbar (should be inset to
 228   // the start of the track within the scrollbar layer's
 229   // position).
 230   UPDATE_AND_EXTRACT_LAYER_POINTERS();
 231   EXPECT_EQ(gfx::Rect(10, 0, 4, 10).ToString(),
 232             scrollbar_layer_impl->ComputeThumbQuadRect().ToString());
 233
 234   // Under-scroll (thumb position should clamp and be unchanged).
 235   root_layer->SetScrollOffset(gfx::Vector2d(-5, 0));
 236
 237   UPDATE_AND_EXTRACT_LAYER_POINTERS();
 238   EXPECT_EQ(gfx::Rect(10, 0, 4, 10).ToString(),
 239             scrollbar_layer_impl->ComputeThumbQuadRect().ToString());
 240
 241   // Over-scroll (thumb position should clamp on the far side).
 242   root_layer->SetScrollOffset(gfx::Vector2d(85, 0));
 243
 244   UPDATE_AND_EXTRACT_LAYER_POINTERS();
 245   EXPECT_EQ(gfx::Rect(56, 0, 4, 10).ToString(),
 246             scrollbar_layer_impl->ComputeThumbQuadRect().ToString());
 247
 248   // Change thumb thickness and length.
 249   scrollbar_layer->fake_scrollbar()->set_thumb_thickness(4);
 250   scrollbar_layer->fake_scrollbar()->set_thumb_length(6);
 251
 252   UPDATE_AND_EXTRACT_LAYER_POINTERS();
 253   EXPECT_EQ(gfx::Rect(54, 0, 6, 4).ToString(),
 254             scrollbar_layer_impl->ComputeThumbQuadRect().ToString());
 255
 256   // Shrink the scrollbar layer to cover only the track.
 257   scrollbar_layer->SetBounds(gfx::Size(50, 10));
 258   scrollbar_layer->fake_scrollbar()->set_location(gfx::Point(30, 10));
 259   scrollbar_layer->fake_scrollbar()->set_track_rect(gfx::Rect(30, 10, 50, 10));
 260
 261   UPDATE_AND_EXTRACT_LAYER_POINTERS();
 262   EXPECT_EQ(gfx::Rect(44, 0, 6, 4).ToString(),
 263             scrollbar_layer_impl->ComputeThumbQuadRect().ToString());
 264
 265   // Shrink the track in the non-scrolling dimension so that it only covers the
 266   // middle third of the scrollbar layer (this does not affect the thumb
 267   // position).
 268   scrollbar_layer->fake_scrollbar()->set_track_rect(gfx::Rect(30, 12, 50, 6));
 269
 270   UPDATE_AND_EXTRACT_LAYER_POINTERS();
 271   EXPECT_EQ(gfx::Rect(44, 0, 6, 4).ToString(),
 272             scrollbar_layer_impl->ComputeThumbQuadRect().ToString());
 273 }
 274
 275 TEST(ScrollbarLayerTest, SolidColorDrawQuads) {
 276   const int kThumbThickness = 3;
 277   const int kTrackStart = 0;
 278   const int kTrackLength = 100;
 279
 280   LayerTreeSettings layer_tree_settings;
 281   scoped_ptr<FakeLayerTreeHost> host =
 282       FakeLayerTreeHost::Create(layer_tree_settings);
 283
 284   scoped_ptr<Scrollbar> scrollbar(new FakeScrollbar(false, true, true));
 285   LayerImpl* layer_impl_tree_root = LayerImplForScrollAreaAndScrollbar(
 286       host.get(), scrollbar.Pass(), false, true, kThumbThickness, kTrackStart);
 287   ScrollbarLayerImplBase* scrollbar_layer_impl =
 288       static_cast<SolidColorScrollbarLayerImpl*>(
 289           layer_impl_tree_root->children()[1]);
 290   scrollbar_layer_impl->SetBounds(gfx::Size(kTrackLength, kThumbThickness));
 291   scrollbar_layer_impl->SetCurrentPos(10.f);
 292   scrollbar_layer_impl->SetMaximum(100);
 293   scrollbar_layer_impl->SetVisibleToTotalLengthRatio(0.4f);
 294
 295   // Thickness should be overridden to 3.
 296   {
 297     MockQuadCuller quad_culler;
 298     AppendQuadsData data;
 299     scrollbar_layer_impl->AppendQuads(&quad_culler, &data);
 300
 301     const QuadList& quads = quad_culler.quad_list();
 302     ASSERT_EQ(1u, quads.size());
 303     EXPECT_EQ(DrawQuad::SOLID_COLOR, quads[0]->material);
 304     EXPECT_RECT_EQ(gfx::Rect(6, 0, 40, 3), quads[0]->rect);
 305   }
 306
 307   // Contents scale should scale the draw quad.
 308   scrollbar_layer_impl->draw_properties().contents_scale_x = 2.f;
 309   scrollbar_layer_impl->draw_properties().contents_scale_y = 2.f;
 310   {
 311     MockQuadCuller quad_culler;
 312     AppendQuadsData data;
 313     scrollbar_layer_impl->AppendQuads(&quad_culler, &data);
 314
 315     const QuadList& quads = quad_culler.quad_list();
 316     ASSERT_EQ(1u, quads.size());
 317     EXPECT_EQ(DrawQuad::SOLID_COLOR, quads[0]->material);
 318     EXPECT_RECT_EQ(gfx::Rect(12, 0, 80, 6), quads[0]->rect);
 319   }
 320   scrollbar_layer_impl->draw_properties().contents_scale_x = 1.f;
 321   scrollbar_layer_impl->draw_properties().contents_scale_y = 1.f;
 322
 323   // For solid color scrollbars, position and size should reflect the
 324   // current viewport state.
 325   scrollbar_layer_impl->SetVisibleToTotalLengthRatio(0.2f);
 326   {
 327     MockQuadCuller quad_culler;
 328     AppendQuadsData data;
 329     scrollbar_layer_impl->AppendQuads(&quad_culler, &data);
 330
 331     const QuadList& quads = quad_culler.quad_list();
 332     ASSERT_EQ(1u, quads.size());
 333     EXPECT_EQ(DrawQuad::SOLID_COLOR, quads[0]->material);
 334     EXPECT_RECT_EQ(gfx::Rect(8, 0, 20, 3), quads[0]->rect);
 335   }
 336 }
 337
 338 TEST(ScrollbarLayerTest, LayerDrivenSolidColorDrawQuads) {
 339   const int kThumbThickness = 3;
 340   const int kTrackStart = 0;
 341   const int kTrackLength = 10;
 342
 343   LayerTreeSettings layer_tree_settings;
 344   scoped_ptr<FakeLayerTreeHost> host =
 345       FakeLayerTreeHost::Create(layer_tree_settings);
 346
 347   scoped_ptr<Scrollbar> scrollbar(new FakeScrollbar(false, true, true));
 348
 349   {
 350     scoped_refptr<Layer> layer_tree_root = Layer::Create();
 351     scoped_refptr<Layer> scroll_layer = Layer::Create();
 352     scroll_layer->SetScrollClipLayerId(layer_tree_root->id());
 353     scoped_refptr<Layer> child1 = Layer::Create();
 354     scoped_refptr<Layer> child2;
 355     const bool kIsLeftSideVerticalScrollbar = false;
 356     child2 = SolidColorScrollbarLayer::Create(scrollbar->Orientation(),
 357                                               kThumbThickness,
 358                                               kTrackStart,
 359                                               kIsLeftSideVerticalScrollbar,
 360                                               child1->id());
 361     child2->ToScrollbarLayer()->SetScrollLayer(scroll_layer->id());
 362     child2->ToScrollbarLayer()->SetClipLayer(layer_tree_root->id());
 363     scroll_layer->AddChild(child1);
 364     scroll_layer->InsertChild(child2, 1);
 365     layer_tree_root->AddChild(scroll_layer);
 366     host->SetRootLayer(layer_tree_root);
 367   }
 368   LayerImpl* layer_impl_tree_root = host->CommitAndCreateLayerImplTree();
 369   LayerImpl* scroll_layer_impl = layer_impl_tree_root->children()[0];
 370
 371   ScrollbarLayerImplBase* scrollbar_layer_impl =
 372       static_cast<PaintedScrollbarLayerImpl*>(scroll_layer_impl->children()[1]);
 373
 374   // Choose layer bounds to give max_scroll_offset = (8, 8).
 375   layer_impl_tree_root->SetBounds(gfx::Size(2, 2));
 376   scroll_layer_impl->SetBounds(gfx::Size(10, 10));
 377   scroll_layer_impl->ScrollBy(gfx::Vector2dF(4.f, 0.f));
 378
 379   scrollbar_layer_impl->SetBounds(gfx::Size(kTrackLength, kThumbThickness));
 380   scrollbar_layer_impl->SetCurrentPos(4.f);
 381   scrollbar_layer_impl->SetMaximum(8);
 382
 383   {
 384     MockQuadCuller quad_culler;
 385     AppendQuadsData data;
 386     scrollbar_layer_impl->AppendQuads(&quad_culler, &data);
 387
 388     const QuadList& quads = quad_culler.quad_list();
 389     ASSERT_EQ(1u, quads.size());
 390     EXPECT_EQ(DrawQuad::SOLID_COLOR, quads[0]->material);
 391     EXPECT_RECT_EQ(gfx::Rect(3, 0, 3, 3), quads[0]->rect);
 392   }
 393 }
 394
 395 class ScrollbarLayerSolidColorThumbTest : public testing::Test {
 396  public:
 397   ScrollbarLayerSolidColorThumbTest() {
 398     LayerTreeSettings layer_tree_settings;
 399     host_impl_.reset(new FakeLayerTreeHostImpl(
 400         layer_tree_settings, &proxy_, &shared_bitmap_manager_));
 401
 402     const int kThumbThickness = 3;
 403     const int kTrackStart = 0;
 404     const bool kIsLeftSideVerticalScrollbar = false;
 405     const bool kIsOverlayScrollbar = false;
 406
 407     horizontal_scrollbar_layer_ =
 408         SolidColorScrollbarLayerImpl::Create(host_impl_->active_tree(),
 409                                              1,
 410                                              HORIZONTAL,
 411                                              kThumbThickness,
 412                                              kTrackStart,
 413                                              kIsLeftSideVerticalScrollbar,
 414                                              kIsOverlayScrollbar);
 415     vertical_scrollbar_layer_ =
 416         SolidColorScrollbarLayerImpl::Create(host_impl_->active_tree(),
 417                                              2,
 418                                              VERTICAL,
 419                                              kThumbThickness,
 420                                              kTrackStart,
 421                                              kIsLeftSideVerticalScrollbar,
 422                                              kIsOverlayScrollbar);
 423   }
 424
 425  protected:
 426   FakeImplProxy proxy_;
 427   TestSharedBitmapManager shared_bitmap_manager_;
 428   scoped_ptr<FakeLayerTreeHostImpl> host_impl_;
 429   scoped_ptr<SolidColorScrollbarLayerImpl> horizontal_scrollbar_layer_;
 430   scoped_ptr<SolidColorScrollbarLayerImpl> vertical_scrollbar_layer_;
 431 };
 432
 433 TEST_F(ScrollbarLayerSolidColorThumbTest, SolidColorThumbLength) {
 434   horizontal_scrollbar_layer_->SetCurrentPos(0);
 435   horizontal_scrollbar_layer_->SetMaximum(10);
 436
 437   // Simple case - one third of the scrollable area is visible, so the thumb
 438   // should be one third as long as the track.
 439   horizontal_scrollbar_layer_->SetVisibleToTotalLengthRatio(0.33f);
 440   horizontal_scrollbar_layer_->SetBounds(gfx::Size(100, 3));
 441   EXPECT_EQ(33, horizontal_scrollbar_layer_->ComputeThumbQuadRect().width());
 442
 443   // The thumb's length should never be less than its thickness.
 444   horizontal_scrollbar_layer_->SetVisibleToTotalLengthRatio(0.01f);
 445   horizontal_scrollbar_layer_->SetBounds(gfx::Size(100, 3));
 446   EXPECT_EQ(3, horizontal_scrollbar_layer_->ComputeThumbQuadRect().width());
 447 }
 448
 449 TEST_F(ScrollbarLayerSolidColorThumbTest, SolidColorThumbPosition) {
 450   horizontal_scrollbar_layer_->SetBounds(gfx::Size(100, 3));
 451   horizontal_scrollbar_layer_->SetVisibleToTotalLengthRatio(0.1f);
 452
 453   horizontal_scrollbar_layer_->SetCurrentPos(0);
 454   horizontal_scrollbar_layer_->SetMaximum(100);
 455   EXPECT_EQ(0, horizontal_scrollbar_layer_->ComputeThumbQuadRect().x());
 456   EXPECT_EQ(10, horizontal_scrollbar_layer_->ComputeThumbQuadRect().width());
 457
 458   horizontal_scrollbar_layer_->SetCurrentPos(100);
 459   // The thumb is 10px long and the track is 100px, so the maximum thumb
 460   // position is 90px.
 461   EXPECT_EQ(90, horizontal_scrollbar_layer_->ComputeThumbQuadRect().x());
 462
 463   horizontal_scrollbar_layer_->SetCurrentPos(80);
 464   // The scroll position is 80% of the maximum, so the thumb's position should
 465   // be at 80% of its maximum or 72px.
 466   EXPECT_EQ(72, horizontal_scrollbar_layer_->ComputeThumbQuadRect().x());
 467 }
 468
 469 TEST_F(ScrollbarLayerSolidColorThumbTest, SolidColorThumbVerticalAdjust) {
 470   SolidColorScrollbarLayerImpl* layers[2] =
 471       { horizontal_scrollbar_layer_.get(), vertical_scrollbar_layer_.get() };
 472   for (size_t i = 0; i < 2; ++i) {
 473     layers[i]->SetVisibleToTotalLengthRatio(0.2f);
 474     layers[i]->SetCurrentPos(25);
 475     layers[i]->SetMaximum(100);
 476   }
 477   layers[0]->SetBounds(gfx::Size(100, 3));
 478   layers[1]->SetBounds(gfx::Size(3, 100));
 479
 480   EXPECT_RECT_EQ(gfx::RectF(20.f, 0.f, 20.f, 3.f),
 481                  horizontal_scrollbar_layer_->ComputeThumbQuadRect());
 482   EXPECT_RECT_EQ(gfx::RectF(0.f, 20.f, 3.f, 20.f),
 483                  vertical_scrollbar_layer_->ComputeThumbQuadRect());
 484
 485   horizontal_scrollbar_layer_->SetVerticalAdjust(10.f);
 486   vertical_scrollbar_layer_->SetVerticalAdjust(10.f);
 487
 488   // The vertical adjustment factor has two effects:
 489   // 1.) Moves the horizontal scrollbar down
 490   // 2.) Increases the vertical scrollbar's effective track length which both
 491   // increases the thumb's length and its position within the track.
 492   EXPECT_RECT_EQ(gfx::Rect(20.f, 10.f, 20.f, 3.f),
 493                  horizontal_scrollbar_layer_->ComputeThumbQuadRect());
 494   EXPECT_RECT_EQ(gfx::Rect(0.f, 22, 3.f, 22.f),
 495                  vertical_scrollbar_layer_->ComputeThumbQuadRect());
 496 }
 497
 498 class ScrollbarLayerTestMaxTextureSize : public LayerTreeTest {
 499  public:
 500   ScrollbarLayerTestMaxTextureSize() {}
 501
 502   void SetScrollbarBounds(const gfx::Size& bounds) { bounds_ = bounds; }
 503
 504   virtual void BeginTest() OVERRIDE {
 505     scroll_layer_ = Layer::Create();
 506     layer_tree_host()->root_layer()->AddChild(scroll_layer_);
 507
 508     scoped_ptr<Scrollbar> scrollbar(new FakeScrollbar);
 509     scrollbar_layer_ =
 510         PaintedScrollbarLayer::Create(scrollbar.Pass(), scroll_layer_->id());
 511     scrollbar_layer_->SetScrollLayer(scroll_layer_->id());
 512     scrollbar_layer_->SetLayerTreeHost(layer_tree_host());
 513     scrollbar_layer_->SetBounds(bounds_);
 514     layer_tree_host()->root_layer()->AddChild(scrollbar_layer_);
 515
 516     PostSetNeedsCommitToMainThread();
 517   }
 518
 519   virtual void DidCommitAndDrawFrame() OVERRIDE {
 520     const int kMaxTextureSize =
 521         layer_tree_host()->GetRendererCapabilities().max_texture_size;
 522
 523     // Check first that we're actually testing something.
 524     EXPECT_GT(scrollbar_layer_->bounds().width(), kMaxTextureSize);
 525
 526     EXPECT_EQ(scrollbar_layer_->content_bounds().width(),
 527               kMaxTextureSize - 1);
 528     EXPECT_EQ(scrollbar_layer_->content_bounds().height(),
 529               kMaxTextureSize - 1);
 530
 531     EndTest();
 532   }
 533
 534   virtual void AfterTest() OVERRIDE {}
 535
 536  private:
 537   scoped_refptr<PaintedScrollbarLayer> scrollbar_layer_;
 538   scoped_refptr<Layer> scroll_layer_;
 539   gfx::Size bounds_;
 540 };
 541
 542 TEST_F(ScrollbarLayerTestMaxTextureSize, DirectRenderer) {
 543   scoped_ptr<TestWebGraphicsContext3D> context =
 544       TestWebGraphicsContext3D::Create();
 545   int max_size = 0;
 546   context->getIntegerv(GL_MAX_TEXTURE_SIZE, &max_size);
 547   SetScrollbarBounds(gfx::Size(max_size + 100, max_size + 100));
 548   RunTest(true, false, true);
 549 }
 550
 551 TEST_F(ScrollbarLayerTestMaxTextureSize, DelegatingRenderer) {
 552   scoped_ptr<TestWebGraphicsContext3D> context =
 553       TestWebGraphicsContext3D::Create();
 554   int max_size = 0;
 555   context->getIntegerv(GL_MAX_TEXTURE_SIZE, &max_size);
 556   SetScrollbarBounds(gfx::Size(max_size + 100, max_size + 100));
 557   RunTest(true, true, true);
 558 }
 559
 560 class MockLayerTreeHost : public LayerTreeHost {
 561  public:
 562   MockLayerTreeHost(FakeLayerTreeHostClient* client,
 563                     const LayerTreeSettings& settings)
 564       : LayerTreeHost(client, NULL, settings),
 565         next_id_(1),
 566         total_ui_resource_created_(0),
 567         total_ui_resource_deleted_(0) {
 568     InitializeSingleThreaded(client);
 569   }
 570
 571   virtual UIResourceId CreateUIResource(UIResourceClient* content) OVERRIDE {
 572     total_ui_resource_created_++;
 573     UIResourceId nid = next_id_++;
 574     ui_resource_bitmap_map_.insert(
 575         std::make_pair(nid, content->GetBitmap(nid, false)));
 576     return nid;
 577   }
 578
 579   // Deletes a UI resource.  May safely be called more than once.
 580   virtual void DeleteUIResource(UIResourceId id) OVERRIDE {
 581     UIResourceBitmapMap::iterator iter = ui_resource_bitmap_map_.find(id);
 582     if (iter != ui_resource_bitmap_map_.end()) {
 583       ui_resource_bitmap_map_.erase(iter);
 584       total_ui_resource_deleted_++;
 585     }
 586   }
 587
 588   size_t UIResourceCount() { return ui_resource_bitmap_map_.size(); }
 589   int TotalUIResourceDeleted() { return total_ui_resource_deleted_; }
 590   int TotalUIResourceCreated() { return total_ui_resource_created_; }
 591
 592   gfx::Size ui_resource_size(UIResourceId id) {
 593     UIResourceBitmapMap::iterator iter = ui_resource_bitmap_map_.find(id);
 594     if (iter != ui_resource_bitmap_map_.end())
 595       return iter->second.GetSize();
 596     return gfx::Size();
 597   }
 598
 599   UIResourceBitmap* ui_resource_bitmap(UIResourceId id) {
 600     UIResourceBitmapMap::iterator iter = ui_resource_bitmap_map_.find(id);
 601     if (iter != ui_resource_bitmap_map_.end())
 602       return &iter->second;
 603     return NULL;
 604   }
 605
 606  private:
 607   typedef base::hash_map<UIResourceId, UIResourceBitmap>
 608       UIResourceBitmapMap;
 609   UIResourceBitmapMap ui_resource_bitmap_map_;
 610
 611   int next_id_;
 612   int total_ui_resource_created_;
 613   int total_ui_resource_deleted_;
 614 };
 615
 616
 617 class ScrollbarLayerTestResourceCreation : public testing::Test {
 618  public:
 619   ScrollbarLayerTestResourceCreation()
 620       : fake_client_(FakeLayerTreeHostClient::DIRECT_3D) {}
 621
 622   void TestResourceUpload(int num_updates,
 623                           size_t expected_resources,
 624                           int expected_created,
 625                           int expected_deleted,
 626                           bool use_solid_color_scrollbar) {
 627     layer_tree_host_.reset(
 628         new MockLayerTreeHost(&fake_client_, layer_tree_settings_));
 629
 630     scoped_ptr<Scrollbar> scrollbar(new FakeScrollbar(false, true, false));
 631     scoped_refptr<Layer> layer_tree_root = Layer::Create();
 632     scoped_refptr<Layer> content_layer = Layer::Create();
 633     scoped_refptr<Layer> scrollbar_layer;
 634     if (use_solid_color_scrollbar) {
 635       const int kThumbThickness = 3;
 636       const int kTrackStart = 0;
 637       const bool kIsLeftSideVerticalScrollbar = false;
 638       scrollbar_layer =
 639           SolidColorScrollbarLayer::Create(scrollbar->Orientation(),
 640                                            kThumbThickness,
 641                                            kTrackStart,
 642                                            kIsLeftSideVerticalScrollbar,
 643                                            layer_tree_root->id());
 644     } else {
 645       scrollbar_layer = PaintedScrollbarLayer::Create(scrollbar.Pass(),
 646                                                       layer_tree_root->id());
 647     }
 648     layer_tree_root->AddChild(content_layer);
 649     layer_tree_root->AddChild(scrollbar_layer);
 650
 651     layer_tree_host_->SetRootLayer(layer_tree_root);
 652
 653     scrollbar_layer->SetIsDrawable(true);
 654     scrollbar_layer->SetBounds(gfx::Size(100, 100));
 655     layer_tree_root->SetScrollOffset(gfx::Vector2d(10, 20));
 656     layer_tree_root->SetBounds(gfx::Size(100, 200));
 657     content_layer->SetBounds(gfx::Size(100, 200));
 658     scrollbar_layer->draw_properties().content_bounds = gfx::Size(100, 200);
 659     scrollbar_layer->draw_properties().visible_content_rect =
 660         gfx::Rect(0, 0, 100, 200);
 661     scrollbar_layer->CreateRenderSurface();
 662     scrollbar_layer->draw_properties().render_target = scrollbar_layer.get();
 663
 664     testing::Mock::VerifyAndClearExpectations(layer_tree_host_.get());
 665     EXPECT_EQ(scrollbar_layer->layer_tree_host(), layer_tree_host_.get());
 666
 667     ResourceUpdateQueue queue;
 668     gfx::Rect screen_space_clip_rect;
 669     OcclusionTracker<Layer> occlusion_tracker(screen_space_clip_rect);
 670
 671     scrollbar_layer->SavePaintProperties();
 672     for (int update_counter = 0; update_counter < num_updates; update_counter++)
 673       scrollbar_layer->Update(&queue, &occlusion_tracker);
 674
 675     // A non-solid-color scrollbar should have requested two textures.
 676     EXPECT_EQ(expected_resources, layer_tree_host_->UIResourceCount());
 677     EXPECT_EQ(expected_created, layer_tree_host_->TotalUIResourceCreated());
 678     EXPECT_EQ(expected_deleted, layer_tree_host_->TotalUIResourceDeleted());
 679
 680     testing::Mock::VerifyAndClearExpectations(layer_tree_host_.get());
 681
 682     scrollbar_layer->ClearRenderSurface();
 683   }
 684
 685  protected:
 686   FakeLayerTreeHostClient fake_client_;
 687   LayerTreeSettings layer_tree_settings_;
 688   scoped_ptr<MockLayerTreeHost> layer_tree_host_;
 689 };
 690
 691 TEST_F(ScrollbarLayerTestResourceCreation, ResourceUpload) {
 692   bool use_solid_color_scrollbars = false;
 693   TestResourceUpload(0, 0, 0, 0, use_solid_color_scrollbars);
 694   int num_updates[3] = {1, 5, 10};
 695   for (int j = 0; j < 3; j++) {
 696     TestResourceUpload(num_updates[j],
 697                        2,
 698                        num_updates[j] * 2,
 699                        (num_updates[j] - 1) * 2,
 700                        use_solid_color_scrollbars);
 701   }
 702 }
 703
 704 TEST_F(ScrollbarLayerTestResourceCreation, SolidColorNoResourceUpload) {
 705   bool use_solid_color_scrollbars = true;
 706   TestResourceUpload(0, 0, 0, 0, use_solid_color_scrollbars);
 707   TestResourceUpload(1, 0, 0, 0, use_solid_color_scrollbars);
 708 }
 709
 710 class ScaledScrollbarLayerTestResourceCreation : public testing::Test {
 711  public:
 712   ScaledScrollbarLayerTestResourceCreation()
 713       : fake_client_(FakeLayerTreeHostClient::DIRECT_3D) {}
 714
 715   void TestResourceUpload(const float test_scale) {
 716     layer_tree_host_.reset(
 717         new MockLayerTreeHost(&fake_client_, layer_tree_settings_));
 718
 719     gfx::Point scrollbar_location(0, 185);
 720     scoped_refptr<Layer> layer_tree_root = Layer::Create();
 721     scoped_refptr<Layer> content_layer = Layer::Create();
 722     scoped_refptr<FakePaintedScrollbarLayer> scrollbar_layer =
 723         FakePaintedScrollbarLayer::Create(false, true, layer_tree_root->id());
 724
 725     layer_tree_root->AddChild(content_layer);
 726     layer_tree_root->AddChild(scrollbar_layer);
 727
 728     layer_tree_host_->SetRootLayer(layer_tree_root);
 729
 730     scrollbar_layer->SetIsDrawable(true);
 731     scrollbar_layer->SetBounds(gfx::Size(100, 15));
 732     scrollbar_layer->SetPosition(scrollbar_location);
 733     layer_tree_root->SetBounds(gfx::Size(100, 200));
 734     content_layer->SetBounds(gfx::Size(100, 200));
 735     gfx::SizeF scaled_size =
 736         gfx::ScaleSize(scrollbar_layer->bounds(), test_scale, test_scale);
 737     gfx::PointF scaled_location =
 738         gfx::ScalePoint(scrollbar_layer->position(), test_scale, test_scale);
 739     scrollbar_layer->draw_properties().content_bounds =
 740         gfx::Size(scaled_size.width(), scaled_size.height());
 741     scrollbar_layer->draw_properties().contents_scale_x = test_scale;
 742     scrollbar_layer->draw_properties().contents_scale_y = test_scale;
 743     scrollbar_layer->draw_properties().visible_content_rect =
 744         gfx::Rect(scaled_location.x(),
 745                   scaled_location.y(),
 746                   scaled_size.width(),
 747                   scaled_size.height());
 748     scrollbar_layer->CreateRenderSurface();
 749     scrollbar_layer->draw_properties().render_target = scrollbar_layer.get();
 750
 751     testing::Mock::VerifyAndClearExpectations(layer_tree_host_.get());
 752     EXPECT_EQ(scrollbar_layer->layer_tree_host(), layer_tree_host_.get());
 753
 754     ResourceUpdateQueue queue;
 755     gfx::Rect screen_space_clip_rect;
 756     OcclusionTracker<Layer> occlusion_tracker(screen_space_clip_rect);
 757     scrollbar_layer->SavePaintProperties();
 758     scrollbar_layer->Update(&queue, &occlusion_tracker);
 759
 760     // Verify that we have not generated any content uploads that are larger
 761     // than their destination textures.
 762
 763     gfx::Size track_size = layer_tree_host_->ui_resource_size(
 764         scrollbar_layer->track_resource_id());
 765     gfx::Size thumb_size = layer_tree_host_->ui_resource_size(
 766         scrollbar_layer->thumb_resource_id());
 767
 768     EXPECT_LE(track_size.width(), scrollbar_layer->content_bounds().width());
 769     EXPECT_LE(track_size.height(), scrollbar_layer->content_bounds().height());
 770     EXPECT_LE(thumb_size.width(), scrollbar_layer->content_bounds().width());
 771     EXPECT_LE(thumb_size.height(), scrollbar_layer->content_bounds().height());
 772
 773     testing::Mock::VerifyAndClearExpectations(layer_tree_host_.get());
 774
 775     scrollbar_layer->ClearRenderSurface();
 776   }
 777
 778  protected:
 779   FakeLayerTreeHostClient fake_client_;
 780   LayerTreeSettings layer_tree_settings_;
 781   scoped_ptr<MockLayerTreeHost> layer_tree_host_;
 782 };
 783
 784 TEST_F(ScaledScrollbarLayerTestResourceCreation, ScaledResourceUpload) {
 785   // Pick a test scale that moves the scrollbar's (non-zero) position to
 786   // a non-pixel-aligned location.
 787   TestResourceUpload(.041f);
 788   TestResourceUpload(1.41f);
 789   TestResourceUpload(4.1f);
 790 }
 791
 792 class ScaledScrollbarLayerTestScaledRasterization : public testing::Test {
 793  public:
 794   ScaledScrollbarLayerTestScaledRasterization()
 795       : fake_client_(FakeLayerTreeHostClient::DIRECT_3D) {}
 796
 797   void TestScale(const gfx::Rect scrollbar_rect, const float test_scale) {
 798     layer_tree_host_.reset(
 799         new MockLayerTreeHost(&fake_client_, layer_tree_settings_));
 800
 801     bool paint_during_update = true;
 802     bool has_thumb = false;
 803     scoped_refptr<Layer> layer_tree_root = Layer::Create();
 804     scoped_refptr<FakePaintedScrollbarLayer> scrollbar_layer =
 805         FakePaintedScrollbarLayer::Create(paint_during_update,
 806                                           has_thumb,
 807                                           layer_tree_root->id());
 808
 809     layer_tree_root->AddChild(scrollbar_layer);
 810
 811     layer_tree_host_->SetRootLayer(layer_tree_root);
 812
 813     scrollbar_layer->SetBounds(scrollbar_rect.size());
 814     scrollbar_layer->SetPosition(scrollbar_rect.origin());
 815     scrollbar_layer->fake_scrollbar()->set_location(scrollbar_rect.origin());
 816     scrollbar_layer->fake_scrollbar()->set_track_rect(scrollbar_rect);
 817     gfx::SizeF scaled_size =
 818         gfx::ScaleSize(scrollbar_layer->bounds(), test_scale, test_scale);
 819     gfx::PointF scaled_location =
 820         gfx::ScalePoint(scrollbar_layer->position(), test_scale, test_scale);
 821     scrollbar_layer->draw_properties().content_bounds =
 822         gfx::Size(scaled_size.width(), scaled_size.height());
 823     scrollbar_layer->draw_properties().contents_scale_x = test_scale;
 824     scrollbar_layer->draw_properties().contents_scale_y = test_scale;
 825     scrollbar_layer->draw_properties().visible_content_rect =
 826         gfx::Rect(scaled_location.x(),
 827                   scaled_location.y(),
 828                   scaled_size.width(),
 829                   scaled_size.height());
 830
 831     ResourceUpdateQueue queue;
 832     gfx::Rect screen_space_clip_rect;
 833     OcclusionTracker<Layer> occlusion_tracker(screen_space_clip_rect);
 834     scrollbar_layer->SavePaintProperties();
 835
 836     scrollbar_layer->Update(&queue, &occlusion_tracker);
 837
 838     UIResourceBitmap* bitmap = layer_tree_host_->ui_resource_bitmap(
 839         scrollbar_layer->track_resource_id());
 840
 841     DCHECK(bitmap);
 842
 843     AutoLockUIResourceBitmap locked_bitmap(*bitmap);
 844
 845     const SkColor* pixels =
 846         reinterpret_cast<const SkColor*>(locked_bitmap.GetPixels());
 847     SkColor color = argb_to_skia(
 848         scrollbar_layer->fake_scrollbar()->paint_fill_color());
 849     int width = bitmap->GetSize().width();
 850     int height = bitmap->GetSize().height();
 851
 852     // Make sure none of the corners of the bitmap were inadvertently clipped.
 853     EXPECT_EQ(color, pixels[0])
 854         << "Top left pixel doesn't match scrollbar color.";
 855
 856     EXPECT_EQ(color, pixels[width - 1])
 857         << "Top right pixel doesn't match scrollbar color.";
 858
 859     EXPECT_EQ(color, pixels[width * (height - 1)])
 860         << "Bottom left pixel doesn't match scrollbar color.";
 861
 862     EXPECT_EQ(color, pixels[width * height - 1])
 863         << "Bottom right pixel doesn't match scrollbar color.";
 864   }
 865
 866  protected:
 867   // On Android, Skia uses ABGR
 868   static SkColor argb_to_skia(SkColor c) {
 869       return (SkColorGetA(c) << SK_A32_SHIFT) |
 870              (SkColorGetR(c) << SK_R32_SHIFT) |
 871              (SkColorGetG(c) << SK_G32_SHIFT) |
 872              (SkColorGetB(c) << SK_B32_SHIFT);
 873   }
 874
 875   FakeLayerTreeHostClient fake_client_;
 876   LayerTreeSettings layer_tree_settings_;
 877   scoped_ptr<MockLayerTreeHost> layer_tree_host_;
 878 };
 879
 880 TEST_F(ScaledScrollbarLayerTestScaledRasterization, TestLostPrecisionInClip) {
 881   // Try rasterization at coordinates and scale that caused problematic
 882   // rounding and clipping errors.
 883   // Vertical Scrollbars.
 884   TestScale(gfx::Rect(1240, 0, 15, 1333), 2.7754839f);
 885   TestScale(gfx::Rect(1240, 0, 15, 677), 2.46677136f);
 886
 887   // Horizontal Scrollbars.
 888   TestScale(gfx::Rect(0, 1240, 1333, 15), 2.7754839f);
 889   TestScale(gfx::Rect(0, 1240, 677, 15), 2.46677136f);
 890 }
 891
 892 }  // namespace
 893 }  // namespace cc