cc : Compute visible rects dynamically (1)

cc/layers/scrollbar_layer_unittest.cc

 // Copyright 2012 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 <stddef.h>
 
 #include <unordered_map>
 
 #include "base/threading/thread_task_runner_handle.h"
 #include "cc/animation/animation_host.h"
@@ skipping 89 matching lines @@
 class ScrollbarLayerTest : public testing::Test {
  public:
   ScrollbarLayerTest() {
     layer_tree_settings_.single_thread_proxy_scheduler = false;
     layer_tree_settings_.use_zero_copy = true;
     layer_tree_settings_.scrollbar_animator = LayerTreeSettings::LINEAR_FADE;
     layer_tree_settings_.scrollbar_fade_delay_ms = 20;
     layer_tree_settings_.scrollbar_fade_duration_ms = 20;
     layer_tree_settings_.verify_transform_tree_calculations = true;
     layer_tree_settings_.verify_clip_tree_calculations = true;
+    layer_tree_settings_.verify_visible_rect_calculations = true;
 
     scrollbar_layer_id_ = -1;
 
     LayerTreeHostInProcess::InitParams params;
     params.client = &fake_client_;
     params.settings = &layer_tree_settings_;
     params.task_graph_runner = &task_graph_runner_;
     params.animation_host =
         AnimationHost::CreateForTesting(ThreadInstance::MAIN);
 
@@ skipping 517 matching lines @@
           scrollbar_layer->effect_tree_index());
   EXPECT_EQ(node->opacity, 1.f);
 }
 
 class ScrollbarLayerSolidColorThumbTest : public testing::Test {
  public:
   ScrollbarLayerSolidColorThumbTest() {
     LayerTreeSettings layer_tree_settings;
     layer_tree_settings.verify_transform_tree_calculations = true;
     layer_tree_settings.verify_clip_tree_calculations = true;
+    layer_tree_settings.verify_visible_rect_calculations = true;
     host_impl_.reset(new FakeLayerTreeHostImpl(
         layer_tree_settings, &task_runner_provider_, &shared_bitmap_manager_,
         &task_graph_runner_));
 
     const int kThumbThickness = 3;
     const int kTrackStart = 0;
     const bool kIsLeftSideVerticalScrollbar = false;
     const bool kIsOverlayScrollbar = false;
 
     horizontal_scrollbar_layer_ =
@@ skipping 462 matching lines @@
   TestScale(gfx::Rect(1240, 0, 15, 1333), 2.7754839f);
   TestScale(gfx::Rect(1240, 0, 15, 677), 2.46677136f);
 
   // Horizontal Scrollbars.
   TestScale(gfx::Rect(0, 1240, 1333, 15), 2.7754839f);
   TestScale(gfx::Rect(0, 1240, 677, 15), 2.46677136f);
 }
 
 }  // namespace
 }  // namespace cc