webkit/renderer/compositor_bindings/web_layer_impl_fixed_bounds_unittest.cc

   1 // Copyright 2013 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 <vector>
   6 #include "cc/layers/picture_image_layer.h"
   7 #include "cc/test/fake_layer_tree_host.h"
   8 #include "cc/test/geometry_test_utils.h"
   9 #include "cc/trees/layer_tree_host_common.h"
  10 #include "testing/gtest/include/gtest/gtest.h"
  11 #include "third_party/WebKit/public/platform/WebFloatPoint.h"
  12 #include "third_party/WebKit/public/platform/WebSize.h"
  13 #include "third_party/skia/include/utils/SkMatrix44.h"
  14 #include "ui/gfx/point3_f.h"
  15 #include "webkit/renderer/compositor_bindings/web_layer_impl_fixed_bounds.h"
  16
  17 using blink::WebFloatPoint;
  18 using blink::WebSize;
  19
  20 namespace webkit {
  21 namespace {
  22
  23 TEST(WebLayerImplFixedBoundsTest, IdentityBounds) {
  24   scoped_ptr<WebLayerImplFixedBounds> layer(new WebLayerImplFixedBounds());
  25   layer->setAnchorPoint(WebFloatPoint(0, 0));
  26   layer->SetFixedBounds(gfx::Size(100, 100));
  27   layer->setBounds(WebSize(100, 100));
  28   EXPECT_EQ(WebSize(100, 100), layer->bounds());
  29   EXPECT_EQ(gfx::Size(100, 100), layer->layer()->bounds());
  30   EXPECT_EQ(gfx::Transform(), layer->layer()->transform());
  31 }
  32
  33 gfx::Point3F TransformPoint(const gfx::Transform& transform,
  34                             const gfx::Point3F& point) {
  35   gfx::Point3F result = point;
  36   transform.TransformPoint(&result);
  37   return result;
  38 }
  39
  40 void CheckBoundsScaleSimple(WebLayerImplFixedBounds* layer,
  41                             const WebSize& bounds,
  42                             const gfx::Size& fixed_bounds) {
  43   layer->setBounds(bounds);
  44   layer->SetFixedBounds(fixed_bounds);
  45
  46   EXPECT_EQ(bounds, layer->bounds());
  47   EXPECT_EQ(fixed_bounds, layer->layer()->bounds());
  48   EXPECT_TRUE(layer->transform().isIdentity());
  49
  50   // An arbitrary point to check the scale and transforms.
  51   gfx::Point3F original_point(10, 20, 1);
  52   gfx::Point3F scaled_point(
  53       original_point.x() * bounds.width / fixed_bounds.width(),
  54       original_point.y() * bounds.height / fixed_bounds.height(),
  55       original_point.z());
  56   // Test if the bounds scale is correctly applied in transform.
  57   EXPECT_POINT3F_EQ(scaled_point,
  58                     TransformPoint(layer->layer()->transform(),
  59                                    original_point));
  60 }
  61
  62 TEST(WebLayerImplFixedBoundsTest, BoundsScaleSimple) {
  63   scoped_ptr<WebLayerImplFixedBounds> layer(new WebLayerImplFixedBounds());
  64   layer->setAnchorPoint(WebFloatPoint(0, 0));
  65   CheckBoundsScaleSimple(layer.get(), WebSize(100, 200), gfx::Size(150, 250));
  66   // Change fixed_bounds.
  67   CheckBoundsScaleSimple(layer.get(), WebSize(100, 200), gfx::Size(75, 100));
  68   // Change bounds.
  69   CheckBoundsScaleSimple(layer.get(), WebSize(300, 100), gfx::Size(75, 100));
  70 }
  71
  72 void ExpectEqualLayerRectsInTarget(cc::Layer* layer1, cc::Layer* layer2) {
  73   gfx::RectF layer1_rect_in_target(layer1->content_bounds());
  74   layer1->draw_transform().TransformRect(&layer1_rect_in_target);
  75
  76   gfx::RectF layer2_rect_in_target(layer2->content_bounds());
  77   layer2->draw_transform().TransformRect(&layer2_rect_in_target);
  78
  79   EXPECT_FLOAT_RECT_EQ(layer1_rect_in_target, layer2_rect_in_target);
  80 }
  81
  82 void CompareFixedBoundsLayerAndNormalLayer(const WebFloatPoint& anchor_point,
  83                                            const gfx::Transform& transform) {
  84   const gfx::Size kDeviceViewportSize(800, 600);
  85   const float kDeviceScaleFactor = 2.f;
  86   const float kPageScaleFactor = 1.5f;
  87
  88   WebSize bounds(150, 200);
  89   WebFloatPoint position(20, 30);
  90   gfx::Size fixed_bounds(160, 70);
  91
  92   scoped_ptr<WebLayerImplFixedBounds> root_layer(new WebLayerImplFixedBounds());
  93
  94   WebLayerImplFixedBounds* fixed_bounds_layer =
  95       new WebLayerImplFixedBounds(cc::PictureImageLayer::Create());
  96   fixed_bounds_layer->setBounds(bounds);
  97   fixed_bounds_layer->SetFixedBounds(fixed_bounds);
  98   fixed_bounds_layer->setAnchorPoint(anchor_point);
  99   fixed_bounds_layer->setTransform(transform.matrix());
 100   fixed_bounds_layer->setPosition(position);
 101   root_layer->addChild(fixed_bounds_layer);
 102
 103   WebLayerImpl* normal_layer(new WebLayerImpl(cc::PictureImageLayer::Create()));
 104
 105   normal_layer->setBounds(bounds);
 106   normal_layer->setAnchorPoint(anchor_point);
 107   normal_layer->setTransform(transform.matrix());
 108   normal_layer->setPosition(position);
 109   root_layer->addChild(normal_layer);
 110
 111   scoped_ptr<cc::FakeLayerTreeHost> host = cc::FakeLayerTreeHost::Create();
 112   host->SetRootLayer(root_layer->layer());
 113
 114   {
 115     cc::RenderSurfaceLayerList render_surface_layer_list;
 116     cc::LayerTreeHostCommon::CalcDrawPropsMainInputsForTesting inputs(
 117         root_layer->layer(), kDeviceViewportSize, &render_surface_layer_list);
 118     inputs.device_scale_factor = kDeviceScaleFactor;
 119     inputs.page_scale_factor = kPageScaleFactor;
 120     inputs.page_scale_application_layer = root_layer->layer(),
 121     cc::LayerTreeHostCommon::CalculateDrawProperties(&inputs);
 122
 123     ExpectEqualLayerRectsInTarget(normal_layer->layer(),
 124                                   fixed_bounds_layer->layer());
 125   }
 126
 127   // Change of fixed bounds should not affect the target geometries.
 128   fixed_bounds_layer->SetFixedBounds(gfx::Size(fixed_bounds.width() / 2,
 129                                                fixed_bounds.height() * 2));
 130
 131   {
 132     cc::RenderSurfaceLayerList render_surface_layer_list;
 133     cc::LayerTreeHostCommon::CalcDrawPropsMainInputsForTesting inputs(
 134         root_layer->layer(), kDeviceViewportSize, &render_surface_layer_list);
 135     inputs.device_scale_factor = kDeviceScaleFactor;
 136     inputs.page_scale_factor = kPageScaleFactor;
 137     inputs.page_scale_application_layer = root_layer->layer(),
 138     cc::LayerTreeHostCommon::CalculateDrawProperties(&inputs);
 139
 140     ExpectEqualLayerRectsInTarget(normal_layer->layer(),
 141                                   fixed_bounds_layer->layer());
 142   }
 143 }
 144
 145 // A black box test that ensures WebLayerImplFixedBounds won't change target
 146 // geometries. Simple case: identity transforms and zero anchor point.
 147 TEST(WebLayerImplFixedBoundsTest, CompareToWebLayerImplSimple) {
 148   CompareFixedBoundsLayerAndNormalLayer(WebFloatPoint(0, 0),
 149                                         gfx::Transform());
 150 }
 151
 152 // A black box test that ensures WebLayerImplFixedBounds won't change target
 153 // geometries. Complex case: complex transforms and non-zero anchor point.
 154 TEST(WebLayerImplFixedBoundsTest, CompareToWebLayerImplComplex) {
 155   gfx::Transform transform;
 156   // These are arbitrary values that should not affect the results.
 157   transform.Translate3d(50, 60, 70);
 158   transform.Scale3d(2, 3, 4);
 159   transform.RotateAbout(gfx::Vector3dF(33, 44, 55), 99);
 160
 161   CompareFixedBoundsLayerAndNormalLayer(WebFloatPoint(0, 0), transform);
 162
 163   // With non-zero anchor point, WebLayerImplFixedBounds will fall back to
 164   // WebLayerImpl.
 165   CompareFixedBoundsLayerAndNormalLayer(WebFloatPoint(0.4f, 0.6f), transform);
 166 }
 167
 168 }  // namespace
 169 }  // namespace webkit