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| 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 "cc/layers/layer_position_constraint.h" |
| 6 |
| 7 #include "cc/layers/layer_impl.h" |
| 8 #include "cc/test/fake_impl_proxy.h" |
| 9 #include "cc/test/fake_layer_tree_host_impl.h" |
| 10 #include "cc/test/geometry_test_utils.h" |
| 11 #include "cc/trees/layer_tree_host_common.h" |
| 12 #include "testing/gtest/include/gtest/gtest.h" |
| 13 |
| 14 namespace cc { |
| 15 namespace { |
| 16 |
| 17 void SetLayerPropertiesForTesting(LayerImpl* layer, |
| 18 const gfx::Transform& transform, |
| 19 const gfx::Transform& sublayer_transform, |
| 20 gfx::PointF anchor, |
| 21 gfx::PointF position, |
| 22 gfx::Size bounds, |
| 23 bool preserves3d) { |
| 24 layer->SetTransform(transform); |
| 25 layer->SetSublayerTransform(sublayer_transform); |
| 26 layer->SetAnchorPoint(anchor); |
| 27 layer->SetPosition(position); |
| 28 layer->SetBounds(bounds); |
| 29 layer->SetPreserves3d(preserves3d); |
| 30 layer->SetContentBounds(bounds); |
| 31 } |
| 32 |
| 33 void ExecuteCalculateDrawProperties(LayerImpl* root_layer, |
| 34 float device_scale_factor, |
| 35 float page_scale_factor, |
| 36 bool can_use_lcd_text) { |
| 37 gfx::Transform identity_matrix; |
| 38 std::vector<LayerImpl*> dummy_render_surface_layer_list; |
| 39 int dummy_max_texture_size = 512; |
| 40 gfx::Size device_viewport_size = |
| 41 gfx::Size(root_layer->bounds().width() * device_scale_factor, |
| 42 root_layer->bounds().height() * device_scale_factor); |
| 43 |
| 44 // We are probably not testing what is intended if the root_layer bounds are |
| 45 // empty. |
| 46 DCHECK(!root_layer->bounds().IsEmpty()); |
| 47 LayerTreeHostCommon::CalculateDrawProperties(root_layer, |
| 48 device_viewport_size, |
| 49 device_scale_factor, |
| 50 page_scale_factor, |
| 51 dummy_max_texture_size, |
| 52 can_use_lcd_text, |
| 53 &dummy_render_surface_layer_list, |
| 54 false); |
| 55 } |
| 56 |
| 57 void ExecuteCalculateDrawProperties(LayerImpl* root_layer) { |
| 58 ExecuteCalculateDrawProperties(root_layer, 1.f, 1.f, false); |
| 59 } |
| 60 |
| 61 class LayerPositionConstraintTest : public testing::Test { |
| 62 public: |
| 63 LayerPositionConstraintTest() |
| 64 : host_impl_(&proxy_) { |
| 65 root_ = CreateTreeForTest(); |
| 66 fixed_to_top_left_.set_is_fixed_position(true); |
| 67 fixed_to_bottom_right_.set_is_fixed_position(true); |
| 68 fixed_to_bottom_right_.set_is_fixed_to_right_edge(true); |
| 69 fixed_to_bottom_right_.set_is_fixed_to_bottom_edge(true); |
| 70 } |
| 71 |
| 72 scoped_ptr<LayerImpl> CreateTreeForTest() { |
| 73 scoped_ptr<LayerImpl> root = |
| 74 LayerImpl::Create(host_impl_.active_tree(), 1); |
| 75 scoped_ptr<LayerImpl> child = |
| 76 LayerImpl::Create(host_impl_.active_tree(), 2); |
| 77 scoped_ptr<LayerImpl> grand_child = |
| 78 LayerImpl::Create(host_impl_.active_tree(), 3); |
| 79 scoped_ptr<LayerImpl> great_grand_child = |
| 80 LayerImpl::Create(host_impl_.active_tree(), 4); |
| 81 |
| 82 gfx::Transform IdentityMatrix; |
| 83 gfx::PointF anchor; |
| 84 gfx::PointF position; |
| 85 gfx::Size bounds(100, 100); |
| 86 SetLayerPropertiesForTesting(root.get(), |
| 87 IdentityMatrix, |
| 88 IdentityMatrix, |
| 89 anchor, |
| 90 position, |
| 91 bounds, |
| 92 false); |
| 93 SetLayerPropertiesForTesting(child.get(), |
| 94 IdentityMatrix, |
| 95 IdentityMatrix, |
| 96 anchor, |
| 97 position, |
| 98 bounds, |
| 99 false); |
| 100 SetLayerPropertiesForTesting(grand_child.get(), |
| 101 IdentityMatrix, |
| 102 IdentityMatrix, |
| 103 anchor, |
| 104 position, |
| 105 bounds, |
| 106 false); |
| 107 SetLayerPropertiesForTesting(great_grand_child.get(), |
| 108 IdentityMatrix, |
| 109 IdentityMatrix, |
| 110 anchor, |
| 111 position, |
| 112 bounds, |
| 113 false); |
| 114 |
| 115 grand_child->AddChild(great_grand_child.Pass()); |
| 116 child->AddChild(grand_child.Pass()); |
| 117 root->AddChild(child.Pass()); |
| 118 |
| 119 return root.Pass(); |
| 120 } |
| 121 protected: |
| 122 FakeImplProxy proxy_; |
| 123 FakeLayerTreeHostImpl host_impl_; |
| 124 scoped_ptr<LayerImpl> root_; |
| 125 |
| 126 LayerPositionConstraint fixed_to_top_left_; |
| 127 LayerPositionConstraint fixed_to_bottom_right_; |
| 128 }; |
| 129 |
| 130 TEST_F(LayerPositionConstraintTest, |
| 131 ScrollCompensationForFixedPositionLayerWithDirectContainer) { |
| 132 // This test checks for correct scroll compensation when the fixed-position |
| 133 // container is the direct parent of the fixed-position layer. |
| 134 LayerImpl* child = root_->children()[0]; |
| 135 LayerImpl* grand_child = child->children()[0]; |
| 136 |
| 137 child->SetIsContainerForFixedPositionLayers(true); |
| 138 grand_child->SetPositionConstraint(fixed_to_top_left_); |
| 139 |
| 140 // Case 1: scroll delta of 0, 0 |
| 141 child->SetScrollDelta(gfx::Vector2d(0, 0)); |
| 142 ExecuteCalculateDrawProperties(root_.get()); |
| 143 |
| 144 gfx::Transform expected_child_transform; |
| 145 gfx::Transform expected_grand_child_transform = expected_child_transform; |
| 146 |
| 147 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| 148 child->draw_transform()); |
| 149 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| 150 grand_child->draw_transform()); |
| 151 |
| 152 // Case 2: scroll delta of 10, 10 |
| 153 child->SetScrollDelta(gfx::Vector2d(10, 10)); |
| 154 ExecuteCalculateDrawProperties(root_.get()); |
| 155 |
| 156 // Here the child is affected by scroll delta, but the fixed position |
| 157 // grand_child should not be affected. |
| 158 expected_child_transform.MakeIdentity(); |
| 159 expected_child_transform.Translate(-10.0, -10.0); |
| 160 |
| 161 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| 162 child->draw_transform()); |
| 163 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| 164 grand_child->draw_transform()); |
| 165 |
| 166 // Case 3: fixed-container size delta of 20, 20 |
| 167 child->SetFixedContainerSizeDelta(gfx::Vector2d(20, 20)); |
| 168 ExecuteCalculateDrawProperties(root_.get()); |
| 169 |
| 170 // Top-left fixed-position layer should not be affected by container size. |
| 171 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| 172 child->draw_transform()); |
| 173 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| 174 grand_child->draw_transform()); |
| 175 |
| 176 // Case 4: Bottom-right fixed-position layer. |
| 177 grand_child->SetPositionConstraint(fixed_to_bottom_right_); |
| 178 ExecuteCalculateDrawProperties(root_.get()); |
| 179 |
| 180 // Bottom-right fixed-position layer moves as container resizes. |
| 181 expected_grand_child_transform.MakeIdentity(); |
| 182 // Apply size delta from the child(container) layer. |
| 183 expected_grand_child_transform.Translate(20.0, 20.0); |
| 184 |
| 185 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| 186 child->draw_transform()); |
| 187 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| 188 grand_child->draw_transform()); |
| 189 } |
| 190 |
| 191 TEST_F(LayerPositionConstraintTest, |
| 192 ScrollCompensationForFixedPositionLayerWithTransformedDirectContainer) { |
| 193 // This test checks for correct scroll compensation when the fixed-position |
| 194 // container is the direct parent of the fixed-position layer, but that |
| 195 // container is transformed. In this case, the fixed position element |
| 196 // inherits the container's transform, but the scroll delta that has to be |
| 197 // undone should not be affected by that transform. |
| 198 // |
| 199 // Transforms are in general non-commutative; using something like a |
| 200 // non-uniform scale helps to verify that translations and non-uniform scales |
| 201 // are applied in the correct order. |
| 202 LayerImpl* child = root_->children()[0]; |
| 203 LayerImpl* grand_child = child->children()[0]; |
| 204 |
| 205 // This scale will cause child and grand_child to be effectively 200 x 800 |
| 206 // with respect to the render target. |
| 207 gfx::Transform non_uniform_scale; |
| 208 non_uniform_scale.Scale(2.0, 8.0); |
| 209 child->SetTransform(non_uniform_scale); |
| 210 |
| 211 child->SetIsContainerForFixedPositionLayers(true); |
| 212 grand_child->SetPositionConstraint(fixed_to_top_left_); |
| 213 |
| 214 // Case 1: scroll delta of 0, 0 |
| 215 child->SetScrollDelta(gfx::Vector2d(0, 0)); |
| 216 ExecuteCalculateDrawProperties(root_.get()); |
| 217 |
| 218 gfx::Transform expected_child_transform; |
| 219 expected_child_transform.PreconcatTransform(non_uniform_scale); |
| 220 |
| 221 gfx::Transform expected_grand_child_transform = expected_child_transform; |
| 222 |
| 223 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| 224 child->draw_transform()); |
| 225 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| 226 grand_child->draw_transform()); |
| 227 |
| 228 // Case 2: scroll delta of 10, 20 |
| 229 child->SetScrollDelta(gfx::Vector2d(10, 20)); |
| 230 ExecuteCalculateDrawProperties(root_.get()); |
| 231 |
| 232 // The child should be affected by scroll delta, but the fixed position |
| 233 // grand_child should not be affected. |
| 234 expected_child_transform.MakeIdentity(); |
| 235 expected_child_transform.Translate(-10.0, -20.0); // scroll delta |
| 236 expected_child_transform.PreconcatTransform(non_uniform_scale); |
| 237 |
| 238 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| 239 child->draw_transform()); |
| 240 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| 241 grand_child->draw_transform()); |
| 242 |
| 243 // Case 3: fixed-container size delta of 20, 20 |
| 244 child->SetFixedContainerSizeDelta(gfx::Vector2d(20, 20)); |
| 245 ExecuteCalculateDrawProperties(root_.get()); |
| 246 |
| 247 // Top-left fixed-position layer should not be affected by container size. |
| 248 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| 249 child->draw_transform()); |
| 250 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| 251 grand_child->draw_transform()); |
| 252 |
| 253 // Case 4: Bottom-right fixed-position layer. |
| 254 grand_child->SetPositionConstraint(fixed_to_bottom_right_); |
| 255 ExecuteCalculateDrawProperties(root_.get()); |
| 256 |
| 257 // Bottom-right fixed-position layer moves as container resizes. |
| 258 expected_grand_child_transform.MakeIdentity(); |
| 259 // Apply child layer transform. |
| 260 expected_grand_child_transform.PreconcatTransform(non_uniform_scale); |
| 261 // Apply size delta from the child(container) layer. |
| 262 expected_grand_child_transform.Translate(20.0, 20.0); |
| 263 |
| 264 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| 265 child->draw_transform()); |
| 266 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| 267 grand_child->draw_transform()); |
| 268 } |
| 269 |
| 270 TEST_F(LayerPositionConstraintTest, |
| 271 ScrollCompensationForFixedPositionLayerWithDistantContainer) { |
| 272 // This test checks for correct scroll compensation when the fixed-position |
| 273 // container is NOT the direct parent of the fixed-position layer. |
| 274 LayerImpl* child = root_->children()[0]; |
| 275 LayerImpl* grand_child = child->children()[0]; |
| 276 LayerImpl* great_grand_child = grand_child->children()[0]; |
| 277 |
| 278 child->SetIsContainerForFixedPositionLayers(true); |
| 279 grand_child->SetPosition(gfx::PointF(8.f, 6.f)); |
| 280 great_grand_child->SetPositionConstraint(fixed_to_top_left_); |
| 281 |
| 282 // Case 1: scroll delta of 0, 0 |
| 283 child->SetScrollDelta(gfx::Vector2d(0, 0)); |
| 284 ExecuteCalculateDrawProperties(root_.get()); |
| 285 |
| 286 gfx::Transform expected_child_transform; |
| 287 gfx::Transform expected_grand_child_transform; |
| 288 expected_grand_child_transform.Translate(8.0, 6.0); |
| 289 |
| 290 gfx::Transform expected_great_grand_child_transform = |
| 291 expected_grand_child_transform; |
| 292 |
| 293 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| 294 child->draw_transform()); |
| 295 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| 296 grand_child->draw_transform()); |
| 297 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_great_grand_child_transform, |
| 298 great_grand_child->draw_transform()); |
| 299 |
| 300 // Case 2: scroll delta of 10, 10 |
| 301 child->SetScrollDelta(gfx::Vector2d(10, 10)); |
| 302 ExecuteCalculateDrawProperties(root_.get()); |
| 303 |
| 304 // Here the child and grand_child are affected by scroll delta, but the fixed |
| 305 // position great_grand_child should not be affected. |
| 306 expected_child_transform.MakeIdentity(); |
| 307 expected_child_transform.Translate(-10.0, -10.0); |
| 308 expected_grand_child_transform.MakeIdentity(); |
| 309 expected_grand_child_transform.Translate(-2.0, -4.0); |
| 310 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| 311 child->draw_transform()); |
| 312 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| 313 grand_child->draw_transform()); |
| 314 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_great_grand_child_transform, |
| 315 great_grand_child->draw_transform()); |
| 316 |
| 317 // Case 3: fixed-container size delta of 20, 20 |
| 318 child->SetFixedContainerSizeDelta(gfx::Vector2d(20, 20)); |
| 319 ExecuteCalculateDrawProperties(root_.get()); |
| 320 |
| 321 // Top-left fixed-position layer should not be affected by container size. |
| 322 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| 323 child->draw_transform()); |
| 324 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| 325 grand_child->draw_transform()); |
| 326 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_great_grand_child_transform, |
| 327 great_grand_child->draw_transform()); |
| 328 |
| 329 // Case 4: Bottom-right fixed-position layer. |
| 330 great_grand_child->SetPositionConstraint(fixed_to_bottom_right_); |
| 331 ExecuteCalculateDrawProperties(root_.get()); |
| 332 |
| 333 // Bottom-right fixed-position layer moves as container resizes. |
| 334 expected_great_grand_child_transform.MakeIdentity(); |
| 335 // Apply size delta from the child(container) layer. |
| 336 expected_great_grand_child_transform.Translate(20.0, 20.0); |
| 337 // Apply layer position from the grand child layer. |
| 338 expected_great_grand_child_transform.Translate(8.0, 6.0); |
| 339 |
| 340 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| 341 child->draw_transform()); |
| 342 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| 343 grand_child->draw_transform()); |
| 344 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_great_grand_child_transform, |
| 345 great_grand_child->draw_transform()); |
| 346 } |
| 347 |
| 348 TEST_F(LayerPositionConstraintTest, |
| 349 ScrollCompensationForFixedPositionLayerWithDistantContainerAndTransforms) { |
| 350 // This test checks for correct scroll compensation when the fixed-position |
| 351 // container is NOT the direct parent of the fixed-position layer, and the |
| 352 // hierarchy has various transforms that have to be processed in the correct |
| 353 // order. |
| 354 LayerImpl* child = root_->children()[0]; |
| 355 LayerImpl* grand_child = child->children()[0]; |
| 356 LayerImpl* great_grand_child = grand_child->children()[0]; |
| 357 |
| 358 gfx::Transform rotation_about_z; |
| 359 rotation_about_z.RotateAboutZAxis(90.0); |
| 360 |
| 361 child->SetIsContainerForFixedPositionLayers(true); |
| 362 child->SetTransform(rotation_about_z); |
| 363 grand_child->SetPosition(gfx::PointF(8.f, 6.f)); |
| 364 grand_child->SetTransform(rotation_about_z); |
| 365 // great_grand_child is positioned upside-down with respect to the render |
| 366 // target. |
| 367 great_grand_child->SetPositionConstraint(fixed_to_top_left_); |
| 368 |
| 369 // Case 1: scroll delta of 0, 0 |
| 370 child->SetScrollDelta(gfx::Vector2d(0, 0)); |
| 371 ExecuteCalculateDrawProperties(root_.get()); |
| 372 |
| 373 gfx::Transform expected_child_transform; |
| 374 expected_child_transform.PreconcatTransform(rotation_about_z); |
| 375 |
| 376 gfx::Transform expected_grand_child_transform; |
| 377 expected_grand_child_transform.PreconcatTransform( |
| 378 rotation_about_z); // child's local transform is inherited |
| 379 // translation because of position occurs before layer's local transform. |
| 380 expected_grand_child_transform.Translate(8.0, 6.0); |
| 381 expected_grand_child_transform.PreconcatTransform( |
| 382 rotation_about_z); // grand_child's local transform |
| 383 |
| 384 gfx::Transform expected_great_grand_child_transform = |
| 385 expected_grand_child_transform; |
| 386 |
| 387 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| 388 child->draw_transform()); |
| 389 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| 390 grand_child->draw_transform()); |
| 391 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_great_grand_child_transform, |
| 392 great_grand_child->draw_transform()); |
| 393 |
| 394 // Case 2: scroll delta of 10, 20 |
| 395 child->SetScrollDelta(gfx::Vector2d(10, 20)); |
| 396 ExecuteCalculateDrawProperties(root_.get()); |
| 397 |
| 398 // Here the child and grand_child are affected by scroll delta, but the fixed |
| 399 // position great_grand_child should not be affected. |
| 400 expected_child_transform.MakeIdentity(); |
| 401 expected_child_transform.Translate(-10.0, -20.0); // scroll delta |
| 402 expected_child_transform.PreconcatTransform(rotation_about_z); |
| 403 |
| 404 expected_grand_child_transform.MakeIdentity(); |
| 405 expected_grand_child_transform.Translate( |
| 406 -10.0, -20.0); // child's scroll delta is inherited |
| 407 expected_grand_child_transform.PreconcatTransform( |
| 408 rotation_about_z); // child's local transform is inherited |
| 409 // translation because of position occurs before layer's local transform. |
| 410 expected_grand_child_transform.Translate(8.0, 6.0); |
| 411 expected_grand_child_transform.PreconcatTransform( |
| 412 rotation_about_z); // grand_child's local transform |
| 413 |
| 414 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| 415 child->draw_transform()); |
| 416 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| 417 grand_child->draw_transform()); |
| 418 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_great_grand_child_transform, |
| 419 great_grand_child->draw_transform()); |
| 420 |
| 421 // Case 3: fixed-container size delta of 20, 20 |
| 422 child->SetFixedContainerSizeDelta(gfx::Vector2d(20, 20)); |
| 423 ExecuteCalculateDrawProperties(root_.get()); |
| 424 |
| 425 // Top-left fixed-position layer should not be affected by container size. |
| 426 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| 427 child->draw_transform()); |
| 428 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| 429 grand_child->draw_transform()); |
| 430 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_great_grand_child_transform, |
| 431 great_grand_child->draw_transform()); |
| 432 |
| 433 // Case 4: Bottom-right fixed-position layer. |
| 434 great_grand_child->SetPositionConstraint(fixed_to_bottom_right_); |
| 435 ExecuteCalculateDrawProperties(root_.get()); |
| 436 |
| 437 // Bottom-right fixed-position layer moves as container resizes. |
| 438 expected_great_grand_child_transform.MakeIdentity(); |
| 439 // Apply child layer transform. |
| 440 expected_great_grand_child_transform.PreconcatTransform(rotation_about_z); |
| 441 // Apply size delta from the child(container) layer. |
| 442 expected_great_grand_child_transform.Translate(20.0, 20.0); |
| 443 // Apply layer position from the grand child layer. |
| 444 expected_great_grand_child_transform.Translate(8.0, 6.0); |
| 445 // Apply grand child layer transform. |
| 446 expected_great_grand_child_transform.PreconcatTransform(rotation_about_z); |
| 447 |
| 448 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| 449 child->draw_transform()); |
| 450 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| 451 grand_child->draw_transform()); |
| 452 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_great_grand_child_transform, |
| 453 great_grand_child->draw_transform()); |
| 454 } |
| 455 |
| 456 TEST_F(LayerPositionConstraintTest, |
| 457 ScrollCompensationForFixedPositionLayerWithMultipleScrollDeltas) { |
| 458 // This test checks for correct scroll compensation when the fixed-position |
| 459 // container has multiple ancestors that have nonzero scroll delta before |
| 460 // reaching the space where the layer is fixed. In this test, each scroll |
| 461 // delta occurs in a different space because of each layer's local transform. |
| 462 // This test checks for correct scroll compensation when the fixed-position |
| 463 // container is NOT the direct parent of the fixed-position layer, and the |
| 464 // hierarchy has various transforms that have to be processed in the correct |
| 465 // order. |
| 466 LayerImpl* child = root_->children()[0]; |
| 467 LayerImpl* grand_child = child->children()[0]; |
| 468 LayerImpl* great_grand_child = grand_child->children()[0]; |
| 469 |
| 470 gfx::Transform rotation_about_z; |
| 471 rotation_about_z.RotateAboutZAxis(90.0); |
| 472 |
| 473 child->SetIsContainerForFixedPositionLayers(true); |
| 474 child->SetTransform(rotation_about_z); |
| 475 grand_child->SetPosition(gfx::PointF(8.f, 6.f)); |
| 476 grand_child->SetTransform(rotation_about_z); |
| 477 // great_grand_child is positioned upside-down with respect to the render |
| 478 // target. |
| 479 great_grand_child->SetPositionConstraint(fixed_to_top_left_); |
| 480 |
| 481 // Case 1: scroll delta of 0, 0 |
| 482 child->SetScrollDelta(gfx::Vector2d(0, 0)); |
| 483 ExecuteCalculateDrawProperties(root_.get()); |
| 484 |
| 485 gfx::Transform expected_child_transform; |
| 486 expected_child_transform.PreconcatTransform(rotation_about_z); |
| 487 |
| 488 gfx::Transform expected_grand_child_transform; |
| 489 expected_grand_child_transform.PreconcatTransform( |
| 490 rotation_about_z); // child's local transform is inherited |
| 491 // translation because of position occurs before layer's local transform. |
| 492 expected_grand_child_transform.Translate(8.0, 6.0); |
| 493 expected_grand_child_transform.PreconcatTransform( |
| 494 rotation_about_z); // grand_child's local transform |
| 495 |
| 496 gfx::Transform expected_great_grand_child_transform = |
| 497 expected_grand_child_transform; |
| 498 |
| 499 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| 500 child->draw_transform()); |
| 501 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| 502 grand_child->draw_transform()); |
| 503 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_great_grand_child_transform, |
| 504 great_grand_child->draw_transform()); |
| 505 |
| 506 // Case 2: scroll delta of 10, 20 |
| 507 child->SetScrollDelta(gfx::Vector2d(10, 0)); |
| 508 grand_child->SetScrollDelta(gfx::Vector2d(5, 0)); |
| 509 ExecuteCalculateDrawProperties(root_.get()); |
| 510 |
| 511 // Here the child and grand_child are affected by scroll delta, but the fixed |
| 512 // position great_grand_child should not be affected. |
| 513 expected_child_transform.MakeIdentity(); |
| 514 expected_child_transform.Translate(-10.0, 0.0); // scroll delta |
| 515 expected_child_transform.PreconcatTransform(rotation_about_z); |
| 516 |
| 517 expected_grand_child_transform.MakeIdentity(); |
| 518 expected_grand_child_transform.Translate( |
| 519 -10.0, 0.0); // child's scroll delta is inherited |
| 520 expected_grand_child_transform.PreconcatTransform( |
| 521 rotation_about_z); // child's local transform is inherited |
| 522 expected_grand_child_transform.Translate(-5.0, |
| 523 0.0); // grand_child's scroll delta |
| 524 // translation because of position occurs before layer's local transform. |
| 525 expected_grand_child_transform.Translate(8.0, 6.0); |
| 526 expected_grand_child_transform.PreconcatTransform( |
| 527 rotation_about_z); // grand_child's local transform |
| 528 |
| 529 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| 530 child->draw_transform()); |
| 531 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| 532 grand_child->draw_transform()); |
| 533 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_great_grand_child_transform, |
| 534 great_grand_child->draw_transform()); |
| 535 |
| 536 // Case 3: fixed-container size delta of 20, 20 |
| 537 child->SetFixedContainerSizeDelta(gfx::Vector2d(20, 20)); |
| 538 ExecuteCalculateDrawProperties(root_.get()); |
| 539 |
| 540 // Top-left fixed-position layer should not be affected by container size. |
| 541 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| 542 child->draw_transform()); |
| 543 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| 544 grand_child->draw_transform()); |
| 545 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_great_grand_child_transform, |
| 546 great_grand_child->draw_transform()); |
| 547 |
| 548 // Case 4: Bottom-right fixed-position layer. |
| 549 great_grand_child->SetPositionConstraint(fixed_to_bottom_right_); |
| 550 ExecuteCalculateDrawProperties(root_.get()); |
| 551 |
| 552 // Bottom-right fixed-position layer moves as container resizes. |
| 553 expected_great_grand_child_transform.MakeIdentity(); |
| 554 // Apply child layer transform. |
| 555 expected_great_grand_child_transform.PreconcatTransform(rotation_about_z); |
| 556 // Apply size delta from the child(container) layer. |
| 557 expected_great_grand_child_transform.Translate(20.0, 20.0); |
| 558 // Apply layer position from the grand child layer. |
| 559 expected_great_grand_child_transform.Translate(8.0, 6.0); |
| 560 // Apply grand child layer transform. |
| 561 expected_great_grand_child_transform.PreconcatTransform(rotation_about_z); |
| 562 |
| 563 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| 564 child->draw_transform()); |
| 565 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| 566 grand_child->draw_transform()); |
| 567 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_great_grand_child_transform, |
| 568 great_grand_child->draw_transform()); |
| 569 } |
| 570 |
| 571 TEST_F(LayerPositionConstraintTest, |
| 572 ScrollCompensationForFixedPositionWithIntermediateSurfaceAndTransforms) { |
| 573 // This test checks for correct scroll compensation when the fixed-position |
| 574 // container contributes to a different render surface than the fixed-position |
| 575 // layer. In this case, the surface draw transforms also have to be accounted |
| 576 // for when checking the scroll delta. |
| 577 LayerImpl* child = root_->children()[0]; |
| 578 LayerImpl* grand_child = child->children()[0]; |
| 579 LayerImpl* great_grand_child = grand_child->children()[0]; |
| 580 |
| 581 child->SetIsContainerForFixedPositionLayers(true); |
| 582 grand_child->SetPosition(gfx::PointF(8.f, 6.f)); |
| 583 grand_child->SetForceRenderSurface(true); |
| 584 great_grand_child->SetPositionConstraint(fixed_to_top_left_); |
| 585 great_grand_child->SetDrawsContent(true); |
| 586 |
| 587 gfx::Transform rotation_about_z; |
| 588 rotation_about_z.RotateAboutZAxis(90.0); |
| 589 grand_child->SetTransform(rotation_about_z); |
| 590 |
| 591 // Case 1: scroll delta of 0, 0 |
| 592 child->SetScrollDelta(gfx::Vector2d(0, 0)); |
| 593 ExecuteCalculateDrawProperties(root_.get()); |
| 594 |
| 595 gfx::Transform expected_child_transform; |
| 596 gfx::Transform expected_surface_draw_transform; |
| 597 expected_surface_draw_transform.Translate(8.0, 6.0); |
| 598 expected_surface_draw_transform.PreconcatTransform(rotation_about_z); |
| 599 gfx::Transform expected_grand_child_transform; |
| 600 gfx::Transform expected_great_grand_child_transform; |
| 601 ASSERT_TRUE(grand_child->render_surface()); |
| 602 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| 603 child->draw_transform()); |
| 604 EXPECT_TRANSFORMATION_MATRIX_EQ( |
| 605 expected_surface_draw_transform, |
| 606 grand_child->render_surface()->draw_transform()); |
| 607 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| 608 grand_child->draw_transform()); |
| 609 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_great_grand_child_transform, |
| 610 great_grand_child->draw_transform()); |
| 611 |
| 612 // Case 2: scroll delta of 10, 30 |
| 613 child->SetScrollDelta(gfx::Vector2d(10, 30)); |
| 614 ExecuteCalculateDrawProperties(root_.get()); |
| 615 |
| 616 // Here the grand_child remains unchanged, because it scrolls along with the |
| 617 // render surface, and the translation is actually in the render surface. But, |
| 618 // the fixed position great_grand_child is more awkward: its actually being |
| 619 // drawn with respect to the render surface, but it needs to remain fixed with |
| 620 // resepct to a container beyond that surface. So, the net result is that, |
| 621 // unlike previous tests where the fixed position layer's transform remains |
| 622 // unchanged, here the fixed position layer's transform explicitly contains |
| 623 // the translation that cancels out the scroll. |
| 624 expected_child_transform.MakeIdentity(); |
| 625 expected_child_transform.Translate(-10.0, -30.0); // scroll delta |
| 626 |
| 627 expected_surface_draw_transform.MakeIdentity(); |
| 628 expected_surface_draw_transform.Translate(-10.0, -30.0); // scroll delta |
| 629 expected_surface_draw_transform.Translate(8.0, 6.0); |
| 630 expected_surface_draw_transform.PreconcatTransform(rotation_about_z); |
| 631 |
| 632 // The rotation and its inverse are needed to place the scroll delta |
| 633 // compensation in the correct space. This test will fail if the |
| 634 // rotation/inverse are backwards, too, so it requires perfect order of |
| 635 // operations. |
| 636 expected_great_grand_child_transform.MakeIdentity(); |
| 637 expected_great_grand_child_transform.PreconcatTransform( |
| 638 Inverse(rotation_about_z)); |
| 639 // explicit canceling out the scroll delta that gets embedded in the fixed |
| 640 // position layer's surface. |
| 641 expected_great_grand_child_transform.Translate(10.0, 30.0); |
| 642 expected_great_grand_child_transform.PreconcatTransform(rotation_about_z); |
| 643 |
| 644 ASSERT_TRUE(grand_child->render_surface()); |
| 645 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| 646 child->draw_transform()); |
| 647 EXPECT_TRANSFORMATION_MATRIX_EQ( |
| 648 expected_surface_draw_transform, |
| 649 grand_child->render_surface()->draw_transform()); |
| 650 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| 651 grand_child->draw_transform()); |
| 652 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_great_grand_child_transform, |
| 653 great_grand_child->draw_transform()); |
| 654 |
| 655 // Case 3: fixed-container size delta of 20, 20 |
| 656 child->SetFixedContainerSizeDelta(gfx::Vector2d(20, 20)); |
| 657 ExecuteCalculateDrawProperties(root_.get()); |
| 658 |
| 659 // Top-left fixed-position layer should not be affected by container size. |
| 660 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| 661 child->draw_transform()); |
| 662 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| 663 grand_child->draw_transform()); |
| 664 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_great_grand_child_transform, |
| 665 great_grand_child->draw_transform()); |
| 666 |
| 667 // Case 4: Bottom-right fixed-position layer. |
| 668 great_grand_child->SetPositionConstraint(fixed_to_bottom_right_); |
| 669 ExecuteCalculateDrawProperties(root_.get()); |
| 670 |
| 671 // Bottom-right fixed-position layer moves as container resizes. |
| 672 expected_great_grand_child_transform.MakeIdentity(); |
| 673 // The rotation and its inverse are needed to place the scroll delta |
| 674 // compensation in the correct space. This test will fail if the |
| 675 // rotation/inverse are backwards, too, so it requires perfect order of |
| 676 // operations. |
| 677 expected_great_grand_child_transform.PreconcatTransform( |
| 678 Inverse(rotation_about_z)); |
| 679 // explicit canceling out the scroll delta that gets embedded in the fixed |
| 680 // position layer's surface. |
| 681 expected_great_grand_child_transform.Translate(10.0, 30.0); |
| 682 // Also apply size delta in the child(container) layer space. |
| 683 expected_great_grand_child_transform.Translate(20.0, 20.0); |
| 684 expected_great_grand_child_transform.PreconcatTransform(rotation_about_z); |
| 685 |
| 686 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| 687 child->draw_transform()); |
| 688 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| 689 grand_child->draw_transform()); |
| 690 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_great_grand_child_transform, |
| 691 great_grand_child->draw_transform()); |
| 692 } |
| 693 |
| 694 TEST_F(LayerPositionConstraintTest, |
| 695 ScrollCompensationForFixedPositionLayerWithMultipleIntermediateSurfaces) { |
| 696 // This test checks for correct scroll compensation when the fixed-position |
| 697 // container contributes to a different render surface than the fixed-position |
| 698 // layer, with additional render surfaces in-between. This checks that the |
| 699 // conversion to ancestor surfaces is accumulated properly in the final matrix |
| 700 // transform. |
| 701 LayerImpl* child = root_->children()[0]; |
| 702 LayerImpl* grand_child = child->children()[0]; |
| 703 LayerImpl* great_grand_child = grand_child->children()[0]; |
| 704 |
| 705 // Add one more layer to the test tree for this scenario. |
| 706 { |
| 707 gfx::Transform identity; |
| 708 scoped_ptr<LayerImpl> fixed_position_child = |
| 709 LayerImpl::Create(host_impl_.active_tree(), 5); |
| 710 SetLayerPropertiesForTesting(fixed_position_child.get(), |
| 711 identity, |
| 712 identity, |
| 713 gfx::PointF(), |
| 714 gfx::PointF(), |
| 715 gfx::Size(100, 100), |
| 716 false); |
| 717 great_grand_child->AddChild(fixed_position_child.Pass()); |
| 718 } |
| 719 LayerImpl* fixed_position_child = great_grand_child->children()[0]; |
| 720 |
| 721 // Actually set up the scenario here. |
| 722 child->SetIsContainerForFixedPositionLayers(true); |
| 723 grand_child->SetPosition(gfx::PointF(8.f, 6.f)); |
| 724 grand_child->SetForceRenderSurface(true); |
| 725 great_grand_child->SetPosition(gfx::PointF(40.f, 60.f)); |
| 726 great_grand_child->SetForceRenderSurface(true); |
| 727 fixed_position_child->SetPositionConstraint(fixed_to_top_left_); |
| 728 fixed_position_child->SetDrawsContent(true); |
| 729 |
| 730 // The additional rotations, which are non-commutative with translations, help |
| 731 // to verify that we have correct order-of-operations in the final scroll |
| 732 // compensation. Note that rotating about the center of the layer ensures we |
| 733 // do not accidentally clip away layers that we want to test. |
| 734 gfx::Transform rotation_about_z; |
| 735 rotation_about_z.Translate(50.0, 50.0); |
| 736 rotation_about_z.RotateAboutZAxis(90.0); |
| 737 rotation_about_z.Translate(-50.0, -50.0); |
| 738 grand_child->SetTransform(rotation_about_z); |
| 739 great_grand_child->SetTransform(rotation_about_z); |
| 740 |
| 741 // Case 1: scroll delta of 0, 0 |
| 742 child->SetScrollDelta(gfx::Vector2d(0, 0)); |
| 743 ExecuteCalculateDrawProperties(root_.get()); |
| 744 |
| 745 gfx::Transform expected_child_transform; |
| 746 |
| 747 gfx::Transform expected_grand_child_surface_draw_transform; |
| 748 expected_grand_child_surface_draw_transform.Translate(8.0, 6.0); |
| 749 expected_grand_child_surface_draw_transform.PreconcatTransform( |
| 750 rotation_about_z); |
| 751 |
| 752 gfx::Transform expected_grand_child_transform; |
| 753 |
| 754 gfx::Transform expected_great_grand_child_surface_draw_transform; |
| 755 expected_great_grand_child_surface_draw_transform.Translate(40.0, 60.0); |
| 756 expected_great_grand_child_surface_draw_transform.PreconcatTransform( |
| 757 rotation_about_z); |
| 758 |
| 759 gfx::Transform expected_great_grand_child_transform; |
| 760 |
| 761 gfx::Transform expected_fixed_position_child_transform; |
| 762 |
| 763 ASSERT_TRUE(grand_child->render_surface()); |
| 764 ASSERT_TRUE(great_grand_child->render_surface()); |
| 765 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| 766 child->draw_transform()); |
| 767 EXPECT_TRANSFORMATION_MATRIX_EQ( |
| 768 expected_grand_child_surface_draw_transform, |
| 769 grand_child->render_surface()->draw_transform()); |
| 770 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| 771 grand_child->draw_transform()); |
| 772 EXPECT_TRANSFORMATION_MATRIX_EQ( |
| 773 expected_great_grand_child_surface_draw_transform, |
| 774 great_grand_child->render_surface()->draw_transform()); |
| 775 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_great_grand_child_transform, |
| 776 great_grand_child->draw_transform()); |
| 777 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_fixed_position_child_transform, |
| 778 fixed_position_child->draw_transform()); |
| 779 |
| 780 // Case 2: scroll delta of 10, 30 |
| 781 child->SetScrollDelta(gfx::Vector2d(10, 30)); |
| 782 ExecuteCalculateDrawProperties(root_.get()); |
| 783 |
| 784 expected_child_transform.MakeIdentity(); |
| 785 expected_child_transform.Translate(-10.0, -30.0); // scroll delta |
| 786 |
| 787 expected_grand_child_surface_draw_transform.MakeIdentity(); |
| 788 expected_grand_child_surface_draw_transform.Translate(-10.0, |
| 789 -30.0); // scroll delta |
| 790 expected_grand_child_surface_draw_transform.Translate(8.0, 6.0); |
| 791 expected_grand_child_surface_draw_transform.PreconcatTransform( |
| 792 rotation_about_z); |
| 793 |
| 794 // grand_child, great_grand_child, and great_grand_child's surface are not |
| 795 // expected to change, since they are all not fixed, and they are all drawn |
| 796 // with respect to grand_child's surface that already has the scroll delta |
| 797 // accounted for. |
| 798 |
| 799 // But the great-great grandchild, "fixed_position_child", should have a |
| 800 // transform that explicitly cancels out the scroll delta. The expected |
| 801 // transform is: compound_draw_transform.Inverse() * translate(positive scroll |
| 802 // delta) * compound_origin_transform from great_grand_childSurface's origin |
| 803 // to the root surface. |
| 804 gfx::Transform compound_draw_transform; |
| 805 compound_draw_transform.Translate(8.0, |
| 806 6.0); // origin translation of grand_child |
| 807 compound_draw_transform.PreconcatTransform( |
| 808 rotation_about_z); // rotation of grand_child |
| 809 compound_draw_transform.Translate( |
| 810 40.0, 60.0); // origin translation of great_grand_child |
| 811 compound_draw_transform.PreconcatTransform( |
| 812 rotation_about_z); // rotation of great_grand_child |
| 813 |
| 814 expected_fixed_position_child_transform.MakeIdentity(); |
| 815 expected_fixed_position_child_transform.PreconcatTransform( |
| 816 Inverse(compound_draw_transform)); |
| 817 // explicit canceling out the scroll delta that gets embedded in the fixed |
| 818 // position layer's surface. |
| 819 expected_fixed_position_child_transform.Translate(10.0, 30.0); |
| 820 expected_fixed_position_child_transform.PreconcatTransform( |
| 821 compound_draw_transform); |
| 822 |
| 823 ASSERT_TRUE(grand_child->render_surface()); |
| 824 ASSERT_TRUE(great_grand_child->render_surface()); |
| 825 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| 826 child->draw_transform()); |
| 827 EXPECT_TRANSFORMATION_MATRIX_EQ( |
| 828 expected_grand_child_surface_draw_transform, |
| 829 grand_child->render_surface()->draw_transform()); |
| 830 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| 831 grand_child->draw_transform()); |
| 832 EXPECT_TRANSFORMATION_MATRIX_EQ( |
| 833 expected_great_grand_child_surface_draw_transform, |
| 834 great_grand_child->render_surface()->draw_transform()); |
| 835 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_great_grand_child_transform, |
| 836 great_grand_child->draw_transform()); |
| 837 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_fixed_position_child_transform, |
| 838 fixed_position_child->draw_transform()); |
| 839 |
| 840 |
| 841 // Case 3: fixed-container size delta of 20, 20 |
| 842 child->SetFixedContainerSizeDelta(gfx::Vector2d(20, 20)); |
| 843 ExecuteCalculateDrawProperties(root_.get()); |
| 844 |
| 845 // Top-left fixed-position layer should not be affected by container size. |
| 846 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| 847 child->draw_transform()); |
| 848 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| 849 grand_child->draw_transform()); |
| 850 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_great_grand_child_transform, |
| 851 great_grand_child->draw_transform()); |
| 852 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_fixed_position_child_transform, |
| 853 fixed_position_child->draw_transform()); |
| 854 |
| 855 // Case 4: Bottom-right fixed-position layer. |
| 856 fixed_position_child->SetPositionConstraint(fixed_to_bottom_right_); |
| 857 ExecuteCalculateDrawProperties(root_.get()); |
| 858 |
| 859 // Bottom-right fixed-position layer moves as container resizes. |
| 860 expected_fixed_position_child_transform.MakeIdentity(); |
| 861 expected_fixed_position_child_transform.PreconcatTransform( |
| 862 Inverse(compound_draw_transform)); |
| 863 // explicit canceling out the scroll delta that gets embedded in the fixed |
| 864 // position layer's surface. |
| 865 expected_fixed_position_child_transform.Translate(10.0, 30.0); |
| 866 // Also apply size delta in the child(container) layer space. |
| 867 expected_fixed_position_child_transform.Translate(20.0, 20.0); |
| 868 expected_fixed_position_child_transform.PreconcatTransform( |
| 869 compound_draw_transform); |
| 870 |
| 871 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| 872 child->draw_transform()); |
| 873 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| 874 grand_child->draw_transform()); |
| 875 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_great_grand_child_transform, |
| 876 great_grand_child->draw_transform()); |
| 877 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_fixed_position_child_transform, |
| 878 fixed_position_child->draw_transform()); |
| 879 } |
| 880 |
| 881 TEST_F(LayerPositionConstraintTest, |
| 882 ScrollCompensationForFixedPositionLayerWithContainerLayerThatHasSurface) { |
| 883 // This test checks for correct scroll compensation when the fixed-position |
| 884 // container itself has a render surface. In this case, the container layer |
| 885 // should be treated like a layer that contributes to a render target, and |
| 886 // that render target is completely irrelevant; it should not affect the |
| 887 // scroll compensation. |
| 888 LayerImpl* child = root_->children()[0]; |
| 889 LayerImpl* grand_child = child->children()[0]; |
| 890 |
| 891 child->SetIsContainerForFixedPositionLayers(true); |
| 892 child->SetForceRenderSurface(true); |
| 893 grand_child->SetPositionConstraint(fixed_to_top_left_); |
| 894 grand_child->SetDrawsContent(true); |
| 895 |
| 896 // Case 1: scroll delta of 0, 0 |
| 897 child->SetScrollDelta(gfx::Vector2d(0, 0)); |
| 898 ExecuteCalculateDrawProperties(root_.get()); |
| 899 |
| 900 gfx::Transform expected_surface_draw_transform; |
| 901 expected_surface_draw_transform.Translate(0.0, 0.0); |
| 902 gfx::Transform expected_child_transform; |
| 903 gfx::Transform expected_grand_child_transform; |
| 904 ASSERT_TRUE(child->render_surface()); |
| 905 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_surface_draw_transform, |
| 906 child->render_surface()->draw_transform()); |
| 907 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| 908 child->draw_transform()); |
| 909 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| 910 grand_child->draw_transform()); |
| 911 |
| 912 // Case 2: scroll delta of 10, 10 |
| 913 child->SetScrollDelta(gfx::Vector2d(10, 10)); |
| 914 ExecuteCalculateDrawProperties(root_.get()); |
| 915 |
| 916 // The surface is translated by scroll delta, the child transform doesn't |
| 917 // change because it scrolls along with the surface, but the fixed position |
| 918 // grand_child needs to compensate for the scroll translation. |
| 919 expected_surface_draw_transform.MakeIdentity(); |
| 920 expected_surface_draw_transform.Translate(-10.0, -10.0); |
| 921 expected_grand_child_transform.MakeIdentity(); |
| 922 expected_grand_child_transform.Translate(10.0, 10.0); |
| 923 |
| 924 ASSERT_TRUE(child->render_surface()); |
| 925 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_surface_draw_transform, |
| 926 child->render_surface()->draw_transform()); |
| 927 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| 928 child->draw_transform()); |
| 929 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| 930 grand_child->draw_transform()); |
| 931 |
| 932 // Case 3: fixed-container size delta of 20, 20 |
| 933 child->SetFixedContainerSizeDelta(gfx::Vector2d(20, 20)); |
| 934 ExecuteCalculateDrawProperties(root_.get()); |
| 935 |
| 936 // Top-left fixed-position layer should not be affected by container size. |
| 937 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| 938 child->draw_transform()); |
| 939 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| 940 grand_child->draw_transform()); |
| 941 |
| 942 // Case 4: Bottom-right fixed-position layer. |
| 943 grand_child->SetPositionConstraint(fixed_to_bottom_right_); |
| 944 ExecuteCalculateDrawProperties(root_.get()); |
| 945 |
| 946 // Bottom-right fixed-position layer moves as container resizes. |
| 947 expected_grand_child_transform.MakeIdentity(); |
| 948 // The surface is translated by scroll delta, the child transform doesn't |
| 949 // change because it scrolls along with the surface, but the fixed position |
| 950 // grand_child needs to compensate for the scroll translation. |
| 951 expected_grand_child_transform.Translate(10.0, 10.0); |
| 952 // Apply size delta from the child(container) layer. |
| 953 expected_grand_child_transform.Translate(20.0, 20.0); |
| 954 |
| 955 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| 956 child->draw_transform()); |
| 957 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| 958 grand_child->draw_transform()); |
| 959 } |
| 960 |
| 961 TEST_F(LayerPositionConstraintTest, |
| 962 ScrollCompensationForFixedPositionLayerThatIsAlsoFixedPositionContainer) { |
| 963 // This test checks the scenario where a fixed-position layer also happens to |
| 964 // be a container itself for a descendant fixed position layer. In particular, |
| 965 // the layer should not accidentally be fixed to itself. |
| 966 LayerImpl* child = root_->children()[0]; |
| 967 LayerImpl* grand_child = child->children()[0]; |
| 968 |
| 969 child->SetIsContainerForFixedPositionLayers(true); |
| 970 grand_child->SetPositionConstraint(fixed_to_top_left_); |
| 971 |
| 972 // This should not confuse the grand_child. If correct, the grand_child would |
| 973 // still be considered fixed to its container (i.e. "child"). |
| 974 grand_child->SetIsContainerForFixedPositionLayers(true); |
| 975 |
| 976 // Case 1: scroll delta of 0, 0 |
| 977 child->SetScrollDelta(gfx::Vector2d(0, 0)); |
| 978 ExecuteCalculateDrawProperties(root_.get()); |
| 979 |
| 980 gfx::Transform expected_child_transform; |
| 981 gfx::Transform expected_grand_child_transform; |
| 982 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| 983 child->draw_transform()); |
| 984 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| 985 grand_child->draw_transform()); |
| 986 |
| 987 // Case 2: scroll delta of 10, 10 |
| 988 child->SetScrollDelta(gfx::Vector2d(10, 10)); |
| 989 ExecuteCalculateDrawProperties(root_.get()); |
| 990 |
| 991 // Here the child is affected by scroll delta, but the fixed position |
| 992 // grand_child should not be affected. |
| 993 expected_child_transform.MakeIdentity(); |
| 994 expected_child_transform.Translate(-10.0, -10.0); |
| 995 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| 996 child->draw_transform()); |
| 997 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| 998 grand_child->draw_transform()); |
| 999 |
| 1000 // Case 3: fixed-container size delta of 20, 20 |
| 1001 child->SetFixedContainerSizeDelta(gfx::Vector2d(20, 20)); |
| 1002 ExecuteCalculateDrawProperties(root_.get()); |
| 1003 |
| 1004 // Top-left fixed-position layer should not be affected by container size. |
| 1005 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| 1006 child->draw_transform()); |
| 1007 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| 1008 grand_child->draw_transform()); |
| 1009 |
| 1010 // Case 4: Bottom-right fixed-position layer. |
| 1011 grand_child->SetPositionConstraint(fixed_to_bottom_right_); |
| 1012 ExecuteCalculateDrawProperties(root_.get()); |
| 1013 |
| 1014 // Bottom-right fixed-position layer moves as container resizes. |
| 1015 expected_grand_child_transform.MakeIdentity(); |
| 1016 // Apply size delta from the child(container) layer. |
| 1017 expected_grand_child_transform.Translate(20.0, 20.0); |
| 1018 |
| 1019 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_child_transform, |
| 1020 child->draw_transform()); |
| 1021 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| 1022 grand_child->draw_transform()); |
| 1023 } |
| 1024 |
| 1025 TEST_F(LayerPositionConstraintTest, |
| 1026 ScrollCompensationForFixedPositionLayerThatHasNoContainer) { |
| 1027 // This test checks scroll compensation when a fixed-position layer does not |
| 1028 // find any ancestor that is a "containerForFixedPositionLayers". In this |
| 1029 // situation, the layer should be fixed to the viewport -- not the root_layer, |
| 1030 // which may have transforms of its own. |
| 1031 LayerImpl* child = root_->children()[0]; |
| 1032 LayerImpl* grand_child = child->children()[0]; |
| 1033 |
| 1034 gfx::Transform rotation_by_z; |
| 1035 rotation_by_z.RotateAboutZAxis(90.0); |
| 1036 |
| 1037 root_->SetTransform(rotation_by_z); |
| 1038 grand_child->SetPositionConstraint(fixed_to_top_left_); |
| 1039 |
| 1040 // Case 1: root scroll delta of 0, 0 |
| 1041 root_->SetScrollDelta(gfx::Vector2d(0, 0)); |
| 1042 ExecuteCalculateDrawProperties(root_.get()); |
| 1043 |
| 1044 gfx::Transform identity_matrix; |
| 1045 |
| 1046 EXPECT_TRANSFORMATION_MATRIX_EQ(identity_matrix, child->draw_transform()); |
| 1047 EXPECT_TRANSFORMATION_MATRIX_EQ(identity_matrix, |
| 1048 grand_child->draw_transform()); |
| 1049 |
| 1050 // Case 2: root scroll delta of 10, 10 |
| 1051 root_->SetScrollDelta(gfx::Vector2d(10, 20)); |
| 1052 ExecuteCalculateDrawProperties(root_.get()); |
| 1053 |
| 1054 // The child is affected by scroll delta, but it is already implcitly |
| 1055 // accounted for by the child's target surface (i.e. the root render surface). |
| 1056 // The grand_child is not affected by the scroll delta, so its draw transform |
| 1057 // needs to explicitly inverse-compensate for the scroll that's embedded in |
| 1058 // the target surface. |
| 1059 gfx::Transform expected_grand_child_transform; |
| 1060 expected_grand_child_transform.PreconcatTransform(Inverse(rotation_by_z)); |
| 1061 // explicit cancelling out the scroll delta that gets embedded in the fixed |
| 1062 // position layer's surface. |
| 1063 expected_grand_child_transform.Translate(10.0, 20.0); |
| 1064 expected_grand_child_transform.PreconcatTransform(rotation_by_z); |
| 1065 |
| 1066 EXPECT_TRANSFORMATION_MATRIX_EQ(identity_matrix, child->draw_transform()); |
| 1067 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| 1068 grand_child->draw_transform()); |
| 1069 |
| 1070 |
| 1071 // Case 3: fixed-container size delta of 20, 20 |
| 1072 root_->SetFixedContainerSizeDelta(gfx::Vector2d(20, 20)); |
| 1073 ExecuteCalculateDrawProperties(root_.get()); |
| 1074 |
| 1075 // Top-left fixed-position layer should not be affected by container size. |
| 1076 EXPECT_TRANSFORMATION_MATRIX_EQ(identity_matrix, child->draw_transform()); |
| 1077 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| 1078 grand_child->draw_transform()); |
| 1079 |
| 1080 // Case 4: Bottom-right fixed-position layer. |
| 1081 grand_child->SetPositionConstraint(fixed_to_bottom_right_); |
| 1082 ExecuteCalculateDrawProperties(root_.get()); |
| 1083 |
| 1084 // Root layer is not the fixed-container anyway. |
| 1085 EXPECT_TRANSFORMATION_MATRIX_EQ(identity_matrix, child->draw_transform()); |
| 1086 EXPECT_TRANSFORMATION_MATRIX_EQ(expected_grand_child_transform, |
| 1087 grand_child->draw_transform()); |
| 1088 } |
| 1089 |
| 1090 } // namespace |
| 1091 } // namespace cc |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 12552004:
Support bottom-right anchored fixed-position elements during a pinch gesture (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master