cc/layers/painted_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/painted_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(PaintedScrollbarLayerImplTest, Occlusion) {
  14   gfx::Size layer_size(10, 1000);
  15   gfx::Size viewport_size(1000, 1000);
  16
  17   LayerTestCommon::LayerImplTest impl;
  18
  19   SkBitmap thumb_sk_bitmap;
  20   thumb_sk_bitmap.allocN32Pixels(10, 10);
  21   thumb_sk_bitmap.setImmutable();
  22   UIResourceId thumb_uid = 5;
  23   UIResourceBitmap thumb_bitmap(thumb_sk_bitmap);
  24   impl.host_impl()->CreateUIResource(thumb_uid, thumb_bitmap);
  25
  26   SkBitmap track_sk_bitmap;
  27   track_sk_bitmap.allocN32Pixels(10, 10);
  28   track_sk_bitmap.setImmutable();
  29   UIResourceId track_uid = 6;
  30   UIResourceBitmap track_bitmap(track_sk_bitmap);
  31   impl.host_impl()->CreateUIResource(track_uid, track_bitmap);
  32
  33   ScrollbarOrientation orientation = VERTICAL;
  34
  35   PaintedScrollbarLayerImpl* scrollbar_layer_impl =
  36       impl.AddChildToRoot<PaintedScrollbarLayerImpl>(orientation);
  37   scrollbar_layer_impl->SetBounds(layer_size);
  38   scrollbar_layer_impl->SetContentBounds(layer_size);
  39   scrollbar_layer_impl->SetDrawsContent(true);
  40   scrollbar_layer_impl->SetThumbThickness(layer_size.width());
  41   scrollbar_layer_impl->SetThumbLength(500);
  42   scrollbar_layer_impl->SetTrackLength(layer_size.height());
  43   scrollbar_layer_impl->SetCurrentPos(100.f / 4);
  44   scrollbar_layer_impl->SetMaximum(100);
  45   scrollbar_layer_impl->SetVisibleToTotalLengthRatio(1.f / 2);
  46   scrollbar_layer_impl->set_track_ui_resource_id(track_uid);
  47   scrollbar_layer_impl->set_thumb_ui_resource_id(thumb_uid);
  48
  49   impl.CalcDrawProps(viewport_size);
  50
  51   gfx::Rect thumb_rect = scrollbar_layer_impl->ComputeThumbQuadRect();
  52   EXPECT_EQ(gfx::Rect(0, 500 / 4, 10, layer_size.height() / 2).ToString(),
  53             thumb_rect.ToString());
  54
  55   {
  56     SCOPED_TRACE("No occlusion");
  57     gfx::Rect occluded;
  58     impl.AppendQuadsWithOcclusion(scrollbar_layer_impl, occluded);
  59
  60     size_t partially_occluded_count = 0;
  61     LayerTestCommon::VerifyQuadsAreOccluded(
  62         impl.quad_list(), occluded, &partially_occluded_count);
  63     EXPECT_EQ(2u, impl.quad_list().size());
  64     EXPECT_EQ(0u, partially_occluded_count);
  65   }
  66
  67   {
  68     SCOPED_TRACE("Full occlusion");
  69     gfx::Rect occluded(scrollbar_layer_impl->visible_content_rect());
  70     impl.AppendQuadsWithOcclusion(scrollbar_layer_impl, occluded);
  71
  72     LayerTestCommon::VerifyQuadsExactlyCoverRect(impl.quad_list(), gfx::Rect());
  73     EXPECT_EQ(impl.quad_list().size(), 0u);
  74   }
  75
  76   {
  77     SCOPED_TRACE("Partial occlusion");
  78     gfx::Rect occluded(0, 0, 5, 1000);
  79     impl.AppendQuadsWithOcclusion(scrollbar_layer_impl, occluded);
  80
  81     size_t partially_occluded_count = 0;
  82     LayerTestCommon::VerifyQuadsAreOccluded(
  83         impl.quad_list(), occluded, &partially_occluded_count);
  84     // The layer outputs two quads, which is partially occluded.
  85     EXPECT_EQ(2u, impl.quad_list().size());
  86     EXPECT_EQ(2u, partially_occluded_count);
  87   }
  88 }
  89
  90 }  // namespace
  91 }  // namespace cc