cc/layers/solid_color_scrollbar_layer_impl_unittest.cc

   1 // Copyright 2014 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/solid_color_scrollbar_layer_impl.h"
   6
   7 #include "cc/test/layer_test_common.h"
   8 #include "testing/gtest/include/gtest/gtest.h"
   9
  10 namespace cc {
  11 namespace {
  12
  13 TEST(SolidColorScrollbarLayerImplTest, Occlusion) {
  14   gfx::Size layer_size(10, 1000);
  15   gfx::Size viewport_size(1000, 1000);
  16
  17   LayerTestCommon::LayerImplTest impl;
  18
  19   ScrollbarOrientation orientation = VERTICAL;
  20   int thumb_thickness = layer_size.width();
  21   int track_start = 0;
  22   bool is_left_side_vertical_scrollbar = false;
  23   bool is_overlay = false;
  24
  25   SolidColorScrollbarLayerImpl* scrollbar_layer_impl =
  26       impl.AddChildToRoot<SolidColorScrollbarLayerImpl>(
  27           orientation,
  28           thumb_thickness,
  29           track_start,
  30           is_left_side_vertical_scrollbar,
  31           is_overlay);
  32   scrollbar_layer_impl->SetBounds(layer_size);
  33   scrollbar_layer_impl->SetContentBounds(layer_size);
  34   scrollbar_layer_impl->SetDrawsContent(true);
  35   scrollbar_layer_impl->SetCurrentPos(100.f / 4);
  36   scrollbar_layer_impl->SetMaximum(100);
  37   scrollbar_layer_impl->SetVisibleToTotalLengthRatio(1.f / 2);
  38   // SolidColorScrollbarLayers construct with opacity = 0.f, so override.
  39   scrollbar_layer_impl->SetOpacity(1.f);
  40
  41   impl.CalcDrawProps(viewport_size);
  42
  43   gfx::Rect thumb_rect = scrollbar_layer_impl->ComputeThumbQuadRect();
  44   EXPECT_EQ(gfx::Rect(0, 500 / 4, 10, layer_size.height() / 2).ToString(),
  45             thumb_rect.ToString());
  46
  47   {
  48     SCOPED_TRACE("No occlusion");
  49     gfx::Rect occluded;
  50     impl.AppendQuadsWithOcclusion(scrollbar_layer_impl, occluded);
  51
  52     LayerTestCommon::VerifyQuadsExactlyCoverRect(impl.quad_list(), thumb_rect);
  53     EXPECT_EQ(1u, impl.quad_list().size());
  54   }
  55
  56   {
  57     SCOPED_TRACE("Full occlusion");
  58     gfx::Rect occluded(scrollbar_layer_impl->visible_content_rect());
  59     impl.AppendQuadsWithOcclusion(scrollbar_layer_impl, occluded);
  60
  61     LayerTestCommon::VerifyQuadsExactlyCoverRect(impl.quad_list(), gfx::Rect());
  62     EXPECT_EQ(impl.quad_list().size(), 0u);
  63   }
  64
  65   {
  66     SCOPED_TRACE("Partial occlusion");
  67     gfx::Rect occluded(0, 0, 5, 1000);
  68     impl.AppendQuadsWithOcclusion(scrollbar_layer_impl, occluded);
  69
  70     size_t partially_occluded_count = 0;
  71     LayerTestCommon::VerifyQuadsCoverRectWithOcclusion(
  72         impl.quad_list(), thumb_rect, occluded, &partially_occluded_count);
  73     // The layer outputs one quad, which is partially occluded.
  74     EXPECT_EQ(1u, impl.quad_list().size());
  75     EXPECT_EQ(1u, partially_occluded_count);
  76   }
  77 }
  78
  79 }  // namespace
  80 }  // namespace cc