ui/compositor/layer.cc

   1 // Copyright (c) 2012 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 "ui/compositor/layer.h"
   6
   7 #include <algorithm>
   8
   9 #include "base/command_line.h"
  10 #include "base/debug/trace_event.h"
  11 #include "base/json/json_writer.h"
  12 #include "base/lazy_instance.h"
  13 #include "base/logging.h"
  14 #include "base/memory/scoped_ptr.h"
  15 #include "cc/base/scoped_ptr_algorithm.h"
  16 #include "cc/layers/content_layer.h"
  17 #include "cc/layers/delegated_renderer_layer.h"
  18 #include "cc/layers/nine_patch_layer.h"
  19 #include "cc/layers/picture_layer.h"
  20 #include "cc/layers/solid_color_layer.h"
  21 #include "cc/layers/surface_layer.h"
  22 #include "cc/layers/texture_layer.h"
  23 #include "cc/output/copy_output_request.h"
  24 #include "cc/output/delegated_frame_data.h"
  25 #include "cc/output/filter_operation.h"
  26 #include "cc/output/filter_operations.h"
  27 #include "cc/resources/transferable_resource.h"
  28 #include "ui/compositor/compositor_switches.h"
  29 #include "ui/compositor/dip_util.h"
  30 #include "ui/compositor/layer_animator.h"
  31 #include "ui/gfx/animation/animation.h"
  32 #include "ui/gfx/canvas.h"
  33 #include "ui/gfx/display.h"
  34 #include "ui/gfx/geometry/point3_f.h"
  35 #include "ui/gfx/geometry/point_conversions.h"
  36 #include "ui/gfx/geometry/size_conversions.h"
  37 #include "ui/gfx/interpolated_transform.h"
  38
  39 namespace {
  40
  41 const ui::Layer* GetRoot(const ui::Layer* layer) {
  42   while (layer->parent())
  43     layer = layer->parent();
  44   return layer;
  45 }
  46
  47 struct UIImplSidePaintingStatus {
  48   UIImplSidePaintingStatus()
  49       : enabled(ui::IsUIImplSidePaintingEnabled()) {
  50   }
  51   bool enabled;
  52 };
  53 base::LazyInstance<UIImplSidePaintingStatus> g_ui_impl_side_painting_status =
  54     LAZY_INSTANCE_INITIALIZER;
  55
  56 }  // namespace
  57
  58 namespace ui {
  59
  60 Layer::Layer()
  61     : type_(LAYER_TEXTURED),
  62       compositor_(NULL),
  63       parent_(NULL),
  64       visible_(true),
  65       force_render_surface_(false),
  66       fills_bounds_opaquely_(true),
  67       fills_bounds_completely_(false),
  68       background_blur_radius_(0),
  69       layer_saturation_(0.0f),
  70       layer_brightness_(0.0f),
  71       layer_grayscale_(0.0f),
  72       layer_inverted_(false),
  73       layer_mask_(NULL),
  74       layer_mask_back_link_(NULL),
  75       zoom_(1),
  76       zoom_inset_(0),
  77       delegate_(NULL),
  78       owner_(NULL),
  79       cc_layer_(NULL),
  80       device_scale_factor_(1.0f) {
  81   CreateCcLayer();
  82 }
  83
  84 Layer::Layer(LayerType type)
  85     : type_(type),
  86       compositor_(NULL),
  87       parent_(NULL),
  88       visible_(true),
  89       force_render_surface_(false),
  90       fills_bounds_opaquely_(true),
  91       fills_bounds_completely_(false),
  92       background_blur_radius_(0),
  93       layer_saturation_(0.0f),
  94       layer_brightness_(0.0f),
  95       layer_grayscale_(0.0f),
  96       layer_inverted_(false),
  97       layer_mask_(NULL),
  98       layer_mask_back_link_(NULL),
  99       zoom_(1),
 100       zoom_inset_(0),
 101       delegate_(NULL),
 102       owner_(NULL),
 103       cc_layer_(NULL),
 104       device_scale_factor_(1.0f) {
 105   CreateCcLayer();
 106 }
 107
 108 Layer::~Layer() {
 109   // Destroying the animator may cause observers to use the layer (and
 110   // indirectly the WebLayer). Destroy the animator first so that the WebLayer
 111   // is still around.
 112   if (animator_.get())
 113     animator_->SetDelegate(NULL);
 114   animator_ = NULL;
 115   if (compositor_)
 116     compositor_->SetRootLayer(NULL);
 117   if (parent_)
 118     parent_->Remove(this);
 119   if (layer_mask_)
 120     SetMaskLayer(NULL);
 121   if (layer_mask_back_link_)
 122     layer_mask_back_link_->SetMaskLayer(NULL);
 123   for (size_t i = 0; i < children_.size(); ++i)
 124     children_[i]->parent_ = NULL;
 125   cc_layer_->RemoveLayerAnimationEventObserver(this);
 126   cc_layer_->RemoveFromParent();
 127 }
 128
 129 // static
 130 bool Layer::UsingPictureLayer() {
 131   return g_ui_impl_side_painting_status.Get().enabled;
 132 }
 133
 134 const Compositor* Layer::GetCompositor() const {
 135   return GetRoot(this)->compositor_;
 136 }
 137
 138 float Layer::opacity() const {
 139   return cc_layer_->opacity();
 140 }
 141
 142 void Layer::SetCompositor(Compositor* compositor) {
 143   // This function must only be called to set the compositor on the root layer,
 144   // or to reset it.
 145   DCHECK(!compositor || !compositor_);
 146   DCHECK(!compositor || compositor->root_layer() == this);
 147   DCHECK(!parent_);
 148   if (compositor_) {
 149     RemoveAnimatorsInTreeFromCollection(
 150         compositor_->layer_animator_collection());
 151   }
 152   compositor_ = compositor;
 153   if (compositor) {
 154     OnDeviceScaleFactorChanged(compositor->device_scale_factor());
 155     SendPendingThreadedAnimations();
 156     AddAnimatorsInTreeToCollection(compositor_->layer_animator_collection());
 157   }
 158 }
 159
 160 void Layer::Add(Layer* child) {
 161   DCHECK(!child->compositor_);
 162   if (child->parent_)
 163     child->parent_->Remove(child);
 164   child->parent_ = this;
 165   children_.push_back(child);
 166   cc_layer_->AddChild(child->cc_layer_);
 167   child->OnDeviceScaleFactorChanged(device_scale_factor_);
 168   if (GetCompositor())
 169     child->SendPendingThreadedAnimations();
 170   LayerAnimatorCollection* collection = GetLayerAnimatorCollection();
 171   if (collection)
 172     child->AddAnimatorsInTreeToCollection(collection);
 173 }
 174
 175 void Layer::Remove(Layer* child) {
 176   // Current bounds are used to calculate offsets when layers are reparented.
 177   // Stop (and complete) an ongoing animation to update the bounds immediately.
 178   LayerAnimator* child_animator = child->animator_.get();
 179   if (child_animator)
 180     child_animator->StopAnimatingProperty(ui::LayerAnimationElement::BOUNDS);
 181   LayerAnimatorCollection* collection = GetLayerAnimatorCollection();
 182   if (collection)
 183     child->RemoveAnimatorsInTreeFromCollection(collection);
 184
 185   std::vector<Layer*>::iterator i =
 186       std::find(children_.begin(), children_.end(), child);
 187   DCHECK(i != children_.end());
 188   children_.erase(i);
 189   child->parent_ = NULL;
 190   child->cc_layer_->RemoveFromParent();
 191 }
 192
 193 void Layer::StackAtTop(Layer* child) {
 194   if (children_.size() <= 1 || child == children_.back())
 195     return;  // Already in front.
 196   StackAbove(child, children_.back());
 197 }
 198
 199 void Layer::StackAbove(Layer* child, Layer* other) {
 200   StackRelativeTo(child, other, true);
 201 }
 202
 203 void Layer::StackAtBottom(Layer* child) {
 204   if (children_.size() <= 1 || child == children_.front())
 205     return;  // Already on bottom.
 206   StackBelow(child, children_.front());
 207 }
 208
 209 void Layer::StackBelow(Layer* child, Layer* other) {
 210   StackRelativeTo(child, other, false);
 211 }
 212
 213 bool Layer::Contains(const Layer* other) const {
 214   for (const Layer* parent = other; parent; parent = parent->parent()) {
 215     if (parent == this)
 216       return true;
 217   }
 218   return false;
 219 }
 220
 221 void Layer::SetAnimator(LayerAnimator* animator) {
 222   if (animator)
 223     animator->SetDelegate(this);
 224   animator_ = animator;
 225 }
 226
 227 LayerAnimator* Layer::GetAnimator() {
 228   if (!animator_.get())
 229     SetAnimator(LayerAnimator::CreateDefaultAnimator());
 230   return animator_.get();
 231 }
 232
 233 void Layer::SetTransform(const gfx::Transform& transform) {
 234   GetAnimator()->SetTransform(transform);
 235 }
 236
 237 gfx::Transform Layer::GetTargetTransform() const {
 238   if (animator_.get() && animator_->IsAnimatingProperty(
 239       LayerAnimationElement::TRANSFORM)) {
 240     return animator_->GetTargetTransform();
 241   }
 242   return transform();
 243 }
 244
 245 void Layer::SetBounds(const gfx::Rect& bounds) {
 246   GetAnimator()->SetBounds(bounds);
 247 }
 248
 249 void Layer::SetSubpixelPositionOffset(const gfx::Vector2dF offset) {
 250   subpixel_position_offset_ = offset;
 251   RecomputePosition();
 252 }
 253
 254 gfx::Rect Layer::GetTargetBounds() const {
 255   if (animator_.get() && animator_->IsAnimatingProperty(
 256       LayerAnimationElement::BOUNDS)) {
 257     return animator_->GetTargetBounds();
 258   }
 259   return bounds_;
 260 }
 261
 262 void Layer::SetMasksToBounds(bool masks_to_bounds) {
 263   cc_layer_->SetMasksToBounds(masks_to_bounds);
 264 }
 265
 266 bool Layer::GetMasksToBounds() const {
 267   return cc_layer_->masks_to_bounds();
 268 }
 269
 270 void Layer::SetOpacity(float opacity) {
 271   GetAnimator()->SetOpacity(opacity);
 272 }
 273
 274 float Layer::GetCombinedOpacity() const {
 275   float opacity = this->opacity();
 276   Layer* current = this->parent_;
 277   while (current) {
 278     opacity *= current->opacity();
 279     current = current->parent_;
 280   }
 281   return opacity;
 282 }
 283
 284 void Layer::SetBackgroundBlur(int blur_radius) {
 285   background_blur_radius_ = blur_radius;
 286
 287   SetLayerBackgroundFilters();
 288 }
 289
 290 void Layer::SetLayerSaturation(float saturation) {
 291   layer_saturation_ = saturation;
 292   SetLayerFilters();
 293 }
 294
 295 void Layer::SetLayerBrightness(float brightness) {
 296   GetAnimator()->SetBrightness(brightness);
 297 }
 298
 299 float Layer::GetTargetBrightness() const {
 300   if (animator_.get() && animator_->IsAnimatingProperty(
 301       LayerAnimationElement::BRIGHTNESS)) {
 302     return animator_->GetTargetBrightness();
 303   }
 304   return layer_brightness();
 305 }
 306
 307 void Layer::SetLayerGrayscale(float grayscale) {
 308   GetAnimator()->SetGrayscale(grayscale);
 309 }
 310
 311 float Layer::GetTargetGrayscale() const {
 312   if (animator_.get() && animator_->IsAnimatingProperty(
 313       LayerAnimationElement::GRAYSCALE)) {
 314     return animator_->GetTargetGrayscale();
 315   }
 316   return layer_grayscale();
 317 }
 318
 319 void Layer::SetLayerInverted(bool inverted) {
 320   layer_inverted_ = inverted;
 321   SetLayerFilters();
 322 }
 323
 324 void Layer::SetMaskLayer(Layer* layer_mask) {
 325   // The provided mask should not have a layer mask itself.
 326   DCHECK(!layer_mask ||
 327          (!layer_mask->layer_mask_layer() &&
 328           layer_mask->children().empty() &&
 329           !layer_mask->layer_mask_back_link_));
 330   DCHECK(!layer_mask_back_link_);
 331   if (layer_mask_ == layer_mask)
 332     return;
 333   // We need to de-reference the currently linked object so that no problem
 334   // arises if the mask layer gets deleted before this object.
 335   if (layer_mask_)
 336     layer_mask_->layer_mask_back_link_ = NULL;
 337   layer_mask_ = layer_mask;
 338   cc_layer_->SetMaskLayer(
 339       layer_mask ? layer_mask->cc_layer() : NULL);
 340   // We need to reference the linked object so that it can properly break the
 341   // link to us when it gets deleted.
 342   if (layer_mask) {
 343     layer_mask->layer_mask_back_link_ = this;
 344     layer_mask->OnDeviceScaleFactorChanged(device_scale_factor_);
 345   }
 346 }
 347
 348 void Layer::SetBackgroundZoom(float zoom, int inset) {
 349   zoom_ = zoom;
 350   zoom_inset_ = inset;
 351
 352   SetLayerBackgroundFilters();
 353 }
 354
 355 void Layer::SetAlphaShape(scoped_ptr<SkRegion> region) {
 356   alpha_shape_ = region.Pass();
 357
 358   SetLayerFilters();
 359 }
 360
 361 void Layer::SetLayerFilters() {
 362   cc::FilterOperations filters;
 363   if (layer_saturation_) {
 364     filters.Append(cc::FilterOperation::CreateSaturateFilter(
 365         layer_saturation_));
 366   }
 367   if (layer_grayscale_) {
 368     filters.Append(cc::FilterOperation::CreateGrayscaleFilter(
 369         layer_grayscale_));
 370   }
 371   if (layer_inverted_)
 372     filters.Append(cc::FilterOperation::CreateInvertFilter(1.0));
 373   // Brightness goes last, because the resulting colors neeed clamping, which
 374   // cause further color matrix filters to be applied separately. In this order,
 375   // they all can be combined in a single pass.
 376   if (layer_brightness_) {
 377     filters.Append(cc::FilterOperation::CreateSaturatingBrightnessFilter(
 378         layer_brightness_));
 379   }
 380   if (alpha_shape_) {
 381     filters.Append(cc::FilterOperation::CreateAlphaThresholdFilter(
 382             *alpha_shape_, 0.f, 0.f));
 383   }
 384
 385   cc_layer_->SetFilters(filters);
 386 }
 387
 388 void Layer::SetLayerBackgroundFilters() {
 389   cc::FilterOperations filters;
 390   if (zoom_ != 1)
 391     filters.Append(cc::FilterOperation::CreateZoomFilter(zoom_, zoom_inset_));
 392
 393   if (background_blur_radius_) {
 394     filters.Append(cc::FilterOperation::CreateBlurFilter(
 395         background_blur_radius_));
 396   }
 397
 398   cc_layer_->SetBackgroundFilters(filters);
 399 }
 400
 401 float Layer::GetTargetOpacity() const {
 402   if (animator_.get() && animator_->IsAnimatingProperty(
 403       LayerAnimationElement::OPACITY))
 404     return animator_->GetTargetOpacity();
 405   return opacity();
 406 }
 407
 408 void Layer::SetVisible(bool visible) {
 409   GetAnimator()->SetVisibility(visible);
 410 }
 411
 412 bool Layer::GetTargetVisibility() const {
 413   if (animator_.get() && animator_->IsAnimatingProperty(
 414       LayerAnimationElement::VISIBILITY))
 415     return animator_->GetTargetVisibility();
 416   return visible_;
 417 }
 418
 419 bool Layer::IsDrawn() const {
 420   const Layer* layer = this;
 421   while (layer && layer->visible_)
 422     layer = layer->parent_;
 423   return layer == NULL;
 424 }
 425
 426 bool Layer::ShouldDraw() const {
 427   return type_ != LAYER_NOT_DRAWN && GetCombinedOpacity() > 0.0f;
 428 }
 429
 430 // static
 431 void Layer::ConvertPointToLayer(const Layer* source,
 432                                 const Layer* target,
 433                                 gfx::Point* point) {
 434   if (source == target)
 435     return;
 436
 437   const Layer* root_layer = GetRoot(source);
 438   CHECK_EQ(root_layer, GetRoot(target));
 439
 440   if (source != root_layer)
 441     source->ConvertPointForAncestor(root_layer, point);
 442   if (target != root_layer)
 443     target->ConvertPointFromAncestor(root_layer, point);
 444 }
 445
 446 bool Layer::GetTargetTransformRelativeTo(const Layer* ancestor,
 447                                          gfx::Transform* transform) const {
 448   const Layer* p = this;
 449   for (; p && p != ancestor; p = p->parent()) {
 450     gfx::Transform translation;
 451     translation.Translate(static_cast<float>(p->bounds().x()),
 452                           static_cast<float>(p->bounds().y()));
 453     // Use target transform so that result will be correct once animation is
 454     // finished.
 455     if (!p->GetTargetTransform().IsIdentity())
 456       transform->ConcatTransform(p->GetTargetTransform());
 457     transform->ConcatTransform(translation);
 458   }
 459   return p == ancestor;
 460 }
 461
 462 void Layer::SetFillsBoundsOpaquely(bool fills_bounds_opaquely) {
 463   if (fills_bounds_opaquely_ == fills_bounds_opaquely)
 464     return;
 465
 466   fills_bounds_opaquely_ = fills_bounds_opaquely;
 467
 468   cc_layer_->SetContentsOpaque(fills_bounds_opaquely);
 469 }
 470
 471 void Layer::SetFillsBoundsCompletely(bool fills_bounds_completely) {
 472   fills_bounds_completely_ = fills_bounds_completely;
 473 }
 474
 475 void Layer::SwitchToLayer(scoped_refptr<cc::Layer> new_layer) {
 476   // Finish animations being handled by cc_layer_.
 477   if (animator_.get()) {
 478     animator_->StopAnimatingProperty(LayerAnimationElement::TRANSFORM);
 479     animator_->StopAnimatingProperty(LayerAnimationElement::OPACITY);
 480   }
 481
 482   if (texture_layer_.get())
 483     texture_layer_->ClearClient();
 484   // TODO(piman): delegated_renderer_layer_ cleanup.
 485
 486   cc_layer_->RemoveAllChildren();
 487   if (cc_layer_->parent()) {
 488     cc_layer_->parent()->ReplaceChild(cc_layer_, new_layer);
 489   }
 490   cc_layer_->SetLayerClient(NULL);
 491   cc_layer_->RemoveLayerAnimationEventObserver(this);
 492   new_layer->SetOpacity(cc_layer_->opacity());
 493   new_layer->SetTransform(cc_layer_->transform());
 494   new_layer->SetPosition(cc_layer_->position());
 495   new_layer->SetBackgroundColor(cc_layer_->background_color());
 496
 497   cc_layer_ = new_layer.get();
 498   content_layer_ = NULL;
 499   solid_color_layer_ = NULL;
 500   texture_layer_ = NULL;
 501   delegated_renderer_layer_ = NULL;
 502   surface_layer_ = NULL;
 503
 504   cc_layer_->AddLayerAnimationEventObserver(this);
 505   for (size_t i = 0; i < children_.size(); ++i) {
 506     DCHECK(children_[i]->cc_layer_);
 507     cc_layer_->AddChild(children_[i]->cc_layer_);
 508   }
 509   cc_layer_->SetLayerClient(this);
 510   cc_layer_->SetTransformOrigin(gfx::Point3F());
 511   cc_layer_->SetContentsOpaque(fills_bounds_opaquely_);
 512   cc_layer_->SetForceRenderSurface(force_render_surface_);
 513   cc_layer_->SetIsDrawable(type_ != LAYER_NOT_DRAWN);
 514   cc_layer_->SetHideLayerAndSubtree(!visible_);
 515
 516   SetLayerFilters();
 517   SetLayerBackgroundFilters();
 518 }
 519
 520 void Layer::SwitchCCLayerForTest() {
 521   scoped_refptr<cc::Layer> new_layer;
 522   if (Layer::UsingPictureLayer())
 523     new_layer = cc::PictureLayer::Create(this);
 524   else
 525     new_layer = cc::ContentLayer::Create(this);
 526   SwitchToLayer(new_layer);
 527   content_layer_ = new_layer;
 528 }
 529
 530 void Layer::SetTextureMailbox(
 531     const cc::TextureMailbox& mailbox,
 532     scoped_ptr<cc::SingleReleaseCallback> release_callback,
 533     gfx::Size texture_size_in_dip) {
 534   DCHECK(type_ == LAYER_TEXTURED || type_ == LAYER_SOLID_COLOR);
 535   DCHECK(mailbox.IsValid());
 536   DCHECK(release_callback);
 537   if (!texture_layer_.get()) {
 538     scoped_refptr<cc::TextureLayer> new_layer =
 539         cc::TextureLayer::CreateForMailbox(this);
 540     new_layer->SetFlipped(true);
 541     SwitchToLayer(new_layer);
 542     texture_layer_ = new_layer;
 543   }
 544   if (mailbox_release_callback_)
 545     mailbox_release_callback_->Run(0, false);
 546   mailbox_release_callback_ = release_callback.Pass();
 547   mailbox_ = mailbox;
 548   SetTextureSize(texture_size_in_dip);
 549 }
 550
 551 void Layer::SetTextureSize(gfx::Size texture_size_in_dip) {
 552   DCHECK(texture_layer_.get());
 553   if (frame_size_in_dip_ == texture_size_in_dip)
 554     return;
 555   frame_size_in_dip_ = texture_size_in_dip;
 556   RecomputeDrawsContentAndUVRect();
 557   texture_layer_->SetNeedsDisplay();
 558 }
 559
 560 void Layer::SetShowDelegatedContent(cc::DelegatedFrameProvider* frame_provider,
 561                                     gfx::Size frame_size_in_dip) {
 562   DCHECK(type_ == LAYER_TEXTURED || type_ == LAYER_SOLID_COLOR);
 563
 564   scoped_refptr<cc::DelegatedRendererLayer> new_layer =
 565       cc::DelegatedRendererLayer::Create(frame_provider);
 566   SwitchToLayer(new_layer);
 567   delegated_renderer_layer_ = new_layer;
 568
 569   frame_size_in_dip_ = frame_size_in_dip;
 570   RecomputeDrawsContentAndUVRect();
 571 }
 572
 573 void Layer::SetShowSurface(
 574     cc::SurfaceId surface_id,
 575     const cc::SurfaceLayer::SatisfyCallback& satisfy_callback,
 576     const cc::SurfaceLayer::RequireCallback& require_callback,
 577     gfx::Size surface_size,
 578     float scale,
 579     gfx::Size frame_size_in_dip) {
 580   DCHECK(type_ == LAYER_TEXTURED || type_ == LAYER_SOLID_COLOR);
 581
 582   scoped_refptr<cc::SurfaceLayer> new_layer =
 583       cc::SurfaceLayer::Create(satisfy_callback, require_callback);
 584   new_layer->SetSurfaceId(surface_id, scale, surface_size);
 585   SwitchToLayer(new_layer);
 586   surface_layer_ = new_layer;
 587
 588   frame_size_in_dip_ = frame_size_in_dip;
 589   RecomputeDrawsContentAndUVRect();
 590 }
 591
 592 void Layer::SetShowSolidColorContent() {
 593   DCHECK_EQ(type_, LAYER_SOLID_COLOR);
 594
 595   if (solid_color_layer_.get())
 596     return;
 597
 598   scoped_refptr<cc::SolidColorLayer> new_layer = cc::SolidColorLayer::Create();
 599   SwitchToLayer(new_layer);
 600   solid_color_layer_ = new_layer;
 601
 602   mailbox_ = cc::TextureMailbox();
 603   if (mailbox_release_callback_) {
 604     mailbox_release_callback_->Run(0, false);
 605     mailbox_release_callback_.reset();
 606   }
 607   RecomputeDrawsContentAndUVRect();
 608 }
 609
 610 void Layer::UpdateNinePatchLayerBitmap(const SkBitmap& bitmap) {
 611   DCHECK(type_ == LAYER_NINE_PATCH && nine_patch_layer_.get());
 612   SkBitmap bitmap_copy;
 613   if (bitmap.isImmutable()) {
 614     bitmap_copy = bitmap;
 615   } else {
 616     // UIResourceBitmap requires an immutable copy of the input |bitmap|.
 617     bitmap.copyTo(&bitmap_copy);
 618     bitmap_copy.setImmutable();
 619   }
 620   nine_patch_layer_->SetBitmap(bitmap_copy);
 621 }
 622
 623 void Layer::UpdateNinePatchLayerAperture(const gfx::Rect& aperture) {
 624   DCHECK(type_ == LAYER_NINE_PATCH && nine_patch_layer_.get());
 625   nine_patch_layer_->SetAperture(aperture);
 626 }
 627
 628 void Layer::UpdateNinePatchLayerBorder(const gfx::Rect& border) {
 629   DCHECK(type_ == LAYER_NINE_PATCH && nine_patch_layer_.get());
 630   nine_patch_layer_->SetBorder(border);
 631 }
 632
 633 void Layer::SetColor(SkColor color) { GetAnimator()->SetColor(color); }
 634
 635 bool Layer::SchedulePaint(const gfx::Rect& invalid_rect) {
 636   if ((type_ == LAYER_SOLID_COLOR && !texture_layer_.get()) ||
 637       type_ == LAYER_NINE_PATCH || (!delegate_ && !mailbox_.IsValid()))
 638     return false;
 639
 640   damaged_region_.op(invalid_rect.x(),
 641                      invalid_rect.y(),
 642                      invalid_rect.right(),
 643                      invalid_rect.bottom(),
 644                      SkRegion::kUnion_Op);
 645   ScheduleDraw();
 646   return true;
 647 }
 648
 649 void Layer::ScheduleDraw() {
 650   Compositor* compositor = GetCompositor();
 651   if (compositor)
 652     compositor->ScheduleDraw();
 653 }
 654
 655 void Layer::SendDamagedRects() {
 656   if ((delegate_ || mailbox_.IsValid()) && !damaged_region_.isEmpty()) {
 657     for (SkRegion::Iterator iter(damaged_region_); !iter.done(); iter.next()) {
 658       const SkIRect& sk_damaged = iter.rect();
 659       gfx::Rect damaged(
 660           sk_damaged.x(),
 661           sk_damaged.y(),
 662           sk_damaged.width(),
 663           sk_damaged.height());
 664       cc_layer_->SetNeedsDisplayRect(damaged);
 665     }
 666     damaged_region_.setEmpty();
 667   }
 668   for (size_t i = 0; i < children_.size(); ++i)
 669     children_[i]->SendDamagedRects();
 670 }
 671
 672 void Layer::CompleteAllAnimations() {
 673   typedef std::vector<scoped_refptr<LayerAnimator> > LayerAnimatorVector;
 674   LayerAnimatorVector animators;
 675   CollectAnimators(&animators);
 676   for (LayerAnimatorVector::const_iterator it = animators.begin();
 677        it != animators.end();
 678        ++it) {
 679     (*it)->StopAnimating();
 680   }
 681 }
 682
 683 void Layer::SuppressPaint() {
 684   if (!delegate_)
 685     return;
 686   delegate_ = NULL;
 687   for (size_t i = 0; i < children_.size(); ++i)
 688     children_[i]->SuppressPaint();
 689 }
 690
 691 void Layer::OnDeviceScaleFactorChanged(float device_scale_factor) {
 692   if (device_scale_factor_ == device_scale_factor)
 693     return;
 694   if (animator_.get())
 695     animator_->StopAnimatingProperty(LayerAnimationElement::TRANSFORM);
 696   device_scale_factor_ = device_scale_factor;
 697   RecomputeDrawsContentAndUVRect();
 698   RecomputePosition();
 699   SchedulePaint(gfx::Rect(bounds_.size()));
 700   if (delegate_)
 701     delegate_->OnDeviceScaleFactorChanged(device_scale_factor);
 702   for (size_t i = 0; i < children_.size(); ++i)
 703     children_[i]->OnDeviceScaleFactorChanged(device_scale_factor);
 704   if (layer_mask_)
 705     layer_mask_->OnDeviceScaleFactorChanged(device_scale_factor);
 706 }
 707
 708 void Layer::OnDelegatedFrameDamage(const gfx::Rect& damage_rect_in_dip) {
 709   DCHECK(delegated_renderer_layer_.get() || surface_layer_.get());
 710   if (!delegate_)
 711     return;
 712   delegate_->OnDelegatedFrameDamage(damage_rect_in_dip);
 713 }
 714
 715 void Layer::RequestCopyOfOutput(scoped_ptr<cc::CopyOutputRequest> request) {
 716   cc_layer_->RequestCopyOfOutput(request.Pass());
 717 }
 718
 719 void Layer::PaintContents(SkCanvas* sk_canvas,
 720                           const gfx::Rect& clip,
 721                           ContentLayerClient::GraphicsContextStatus gc_status) {
 722   TRACE_EVENT0("ui", "Layer::PaintContents");
 723   scoped_ptr<gfx::Canvas> canvas(gfx::Canvas::CreateCanvasWithoutScaling(
 724       sk_canvas, device_scale_factor_));
 725   if (delegate_)
 726     delegate_->OnPaintLayer(canvas.get());
 727 }
 728
 729 scoped_refptr<cc::DisplayItemList> Layer::PaintContentsToDisplayList(
 730     const gfx::Rect& clip,
 731     ContentLayerClient::GraphicsContextStatus gc_status) {
 732   NOTIMPLEMENTED();
 733   return cc::DisplayItemList::Create();
 734 }
 735
 736 bool Layer::FillsBoundsCompletely() const { return fills_bounds_completely_; }
 737
 738 bool Layer::PrepareTextureMailbox(
 739     cc::TextureMailbox* mailbox,
 740     scoped_ptr<cc::SingleReleaseCallback>* release_callback,
 741     bool use_shared_memory) {
 742   if (!mailbox_release_callback_)
 743     return false;
 744   *mailbox = mailbox_;
 745   *release_callback = mailbox_release_callback_.Pass();
 746   return true;
 747 }
 748
 749 void Layer::SetForceRenderSurface(bool force) {
 750   if (force_render_surface_ == force)
 751     return;
 752
 753   force_render_surface_ = force;
 754   cc_layer_->SetForceRenderSurface(force_render_surface_);
 755 }
 756
 757 class LayerDebugInfo : public base::debug::ConvertableToTraceFormat {
 758  public:
 759   explicit LayerDebugInfo(std::string name) : name_(name) { }
 760   void AppendAsTraceFormat(std::string* out) const override {
 761     base::DictionaryValue dictionary;
 762     dictionary.SetString("layer_name", name_);
 763     base::JSONWriter::Write(&dictionary, out);
 764   }
 765
 766  private:
 767   ~LayerDebugInfo() override {}
 768   std::string name_;
 769 };
 770
 771 scoped_refptr<base::debug::ConvertableToTraceFormat> Layer::TakeDebugInfo() {
 772   return new LayerDebugInfo(name_);
 773 }
 774
 775 void Layer::OnAnimationStarted(const cc::AnimationEvent& event) {
 776   if (animator_.get())
 777     animator_->OnThreadedAnimationStarted(event);
 778 }
 779
 780 void Layer::CollectAnimators(
 781     std::vector<scoped_refptr<LayerAnimator> >* animators) {
 782   if (IsAnimating())
 783     animators->push_back(animator_);
 784   std::for_each(children_.begin(), children_.end(),
 785                 std::bind2nd(std::mem_fun(&Layer::CollectAnimators),
 786                              animators));
 787 }
 788
 789 void Layer::StackRelativeTo(Layer* child, Layer* other, bool above) {
 790   DCHECK_NE(child, other);
 791   DCHECK_EQ(this, child->parent());
 792   DCHECK_EQ(this, other->parent());
 793
 794   const size_t child_i =
 795       std::find(children_.begin(), children_.end(), child) - children_.begin();
 796   const size_t other_i =
 797       std::find(children_.begin(), children_.end(), other) - children_.begin();
 798   if ((above && child_i == other_i + 1) || (!above && child_i + 1 == other_i))
 799     return;
 800
 801   const size_t dest_i =
 802       above ?
 803       (child_i < other_i ? other_i : other_i + 1) :
 804       (child_i < other_i ? other_i - 1 : other_i);
 805   children_.erase(children_.begin() + child_i);
 806   children_.insert(children_.begin() + dest_i, child);
 807
 808   child->cc_layer_->RemoveFromParent();
 809   cc_layer_->InsertChild(child->cc_layer_, dest_i);
 810 }
 811
 812 bool Layer::ConvertPointForAncestor(const Layer* ancestor,
 813                                     gfx::Point* point) const {
 814   gfx::Transform transform;
 815   bool result = GetTargetTransformRelativeTo(ancestor, &transform);
 816   gfx::Point3F p(*point);
 817   transform.TransformPoint(&p);
 818   *point = gfx::ToFlooredPoint(p.AsPointF());
 819   return result;
 820 }
 821
 822 bool Layer::ConvertPointFromAncestor(const Layer* ancestor,
 823                                      gfx::Point* point) const {
 824   gfx::Transform transform;
 825   bool result = GetTargetTransformRelativeTo(ancestor, &transform);
 826   gfx::Point3F p(*point);
 827   transform.TransformPointReverse(&p);
 828   *point = gfx::ToFlooredPoint(p.AsPointF());
 829   return result;
 830 }
 831
 832 void Layer::SetBoundsFromAnimation(const gfx::Rect& bounds) {
 833   if (bounds == bounds_)
 834     return;
 835
 836   base::Closure closure;
 837   if (delegate_)
 838     closure = delegate_->PrepareForLayerBoundsChange();
 839   bool was_move = bounds_.size() == bounds.size();
 840   bounds_ = bounds;
 841
 842   RecomputeDrawsContentAndUVRect();
 843   RecomputePosition();
 844
 845   if (!closure.is_null())
 846     closure.Run();
 847
 848   if (was_move) {
 849     // Don't schedule a draw if we're invisible. We'll schedule one
 850     // automatically when we get visible.
 851     if (IsDrawn())
 852       ScheduleDraw();
 853   } else {
 854     // Always schedule a paint, even if we're invisible.
 855     SchedulePaint(gfx::Rect(bounds.size()));
 856   }
 857 }
 858
 859 void Layer::SetTransformFromAnimation(const gfx::Transform& transform) {
 860   cc_layer_->SetTransform(transform);
 861 }
 862
 863 void Layer::SetOpacityFromAnimation(float opacity) {
 864   cc_layer_->SetOpacity(opacity);
 865   ScheduleDraw();
 866 }
 867
 868 void Layer::SetVisibilityFromAnimation(bool visible) {
 869   if (visible_ == visible)
 870     return;
 871
 872   visible_ = visible;
 873   cc_layer_->SetHideLayerAndSubtree(!visible_);
 874 }
 875
 876 void Layer::SetBrightnessFromAnimation(float brightness) {
 877   layer_brightness_ = brightness;
 878   SetLayerFilters();
 879 }
 880
 881 void Layer::SetGrayscaleFromAnimation(float grayscale) {
 882   layer_grayscale_ = grayscale;
 883   SetLayerFilters();
 884 }
 885
 886 void Layer::SetColorFromAnimation(SkColor color) {
 887   DCHECK_EQ(type_, LAYER_SOLID_COLOR);
 888   cc_layer_->SetBackgroundColor(color);
 889   SetFillsBoundsOpaquely(SkColorGetA(color) == 0xFF);
 890 }
 891
 892 void Layer::ScheduleDrawForAnimation() {
 893   ScheduleDraw();
 894 }
 895
 896 const gfx::Rect& Layer::GetBoundsForAnimation() const {
 897   return bounds();
 898 }
 899
 900 gfx::Transform Layer::GetTransformForAnimation() const {
 901   return transform();
 902 }
 903
 904 float Layer::GetOpacityForAnimation() const {
 905   return opacity();
 906 }
 907
 908 bool Layer::GetVisibilityForAnimation() const {
 909   return visible();
 910 }
 911
 912 float Layer::GetBrightnessForAnimation() const {
 913   return layer_brightness();
 914 }
 915
 916 float Layer::GetGrayscaleForAnimation() const {
 917   return layer_grayscale();
 918 }
 919
 920 SkColor Layer::GetColorForAnimation() const {
 921   // WebColor is equivalent to SkColor, per WebColor.h.
 922   // The NULL check is here since this is invoked regardless of whether we have
 923   // been configured as LAYER_SOLID_COLOR.
 924   return solid_color_layer_.get() ?
 925       solid_color_layer_->background_color() : SK_ColorBLACK;
 926 }
 927
 928 float Layer::GetDeviceScaleFactor() const {
 929   return device_scale_factor_;
 930 }
 931
 932 void Layer::AddThreadedAnimation(scoped_ptr<cc::Animation> animation) {
 933   DCHECK(cc_layer_);
 934   // Until this layer has a compositor (and hence cc_layer_ has a
 935   // LayerTreeHost), addAnimation will fail.
 936   if (GetCompositor())
 937     cc_layer_->AddAnimation(animation.Pass());
 938   else
 939     pending_threaded_animations_.push_back(animation.Pass());
 940 }
 941
 942 namespace{
 943
 944 struct HasAnimationId {
 945   HasAnimationId(int id): id_(id) {
 946   }
 947
 948   bool operator()(cc::Animation* animation) const {
 949     return animation->id() == id_;
 950   }
 951
 952  private:
 953   int id_;
 954 };
 955
 956 }
 957
 958 void Layer::RemoveThreadedAnimation(int animation_id) {
 959   DCHECK(cc_layer_);
 960   if (pending_threaded_animations_.size() == 0) {
 961     cc_layer_->RemoveAnimation(animation_id);
 962     return;
 963   }
 964
 965   pending_threaded_animations_.erase(
 966       cc::remove_if(&pending_threaded_animations_,
 967                     pending_threaded_animations_.begin(),
 968                     pending_threaded_animations_.end(),
 969                     HasAnimationId(animation_id)),
 970       pending_threaded_animations_.end());
 971 }
 972
 973 LayerAnimatorCollection* Layer::GetLayerAnimatorCollection() {
 974   Compositor* compositor = GetCompositor();
 975   return compositor ? compositor->layer_animator_collection() : NULL;
 976 }
 977
 978 void Layer::SendPendingThreadedAnimations() {
 979   for (cc::ScopedPtrVector<cc::Animation>::iterator it =
 980            pending_threaded_animations_.begin();
 981        it != pending_threaded_animations_.end();
 982        ++it)
 983     cc_layer_->AddAnimation(pending_threaded_animations_.take(it));
 984
 985   pending_threaded_animations_.clear();
 986
 987   for (size_t i = 0; i < children_.size(); ++i)
 988     children_[i]->SendPendingThreadedAnimations();
 989 }
 990
 991 void Layer::CreateCcLayer() {
 992   if (type_ == LAYER_SOLID_COLOR) {
 993     solid_color_layer_ = cc::SolidColorLayer::Create();
 994     cc_layer_ = solid_color_layer_.get();
 995   } else if (type_ == LAYER_NINE_PATCH) {
 996     nine_patch_layer_ = cc::NinePatchLayer::Create();
 997     cc_layer_ = nine_patch_layer_.get();
 998   } else {
 999     if (Layer::UsingPictureLayer())
1000       content_layer_ = cc::PictureLayer::Create(this);
1001     else
1002       content_layer_ = cc::ContentLayer::Create(this);
1003     cc_layer_ = content_layer_.get();
1004   }
1005   cc_layer_->SetTransformOrigin(gfx::Point3F());
1006   cc_layer_->SetContentsOpaque(true);
1007   cc_layer_->SetIsDrawable(type_ != LAYER_NOT_DRAWN);
1008   cc_layer_->AddLayerAnimationEventObserver(this);
1009   cc_layer_->SetLayerClient(this);
1010   RecomputePosition();
1011 }
1012
1013 gfx::Transform Layer::transform() const {
1014   return cc_layer_->transform();
1015 }
1016
1017 void Layer::RecomputeDrawsContentAndUVRect() {
1018   DCHECK(cc_layer_);
1019   gfx::Size size(bounds_.size());
1020   if (texture_layer_.get()) {
1021     size.SetToMin(frame_size_in_dip_);
1022     gfx::PointF uv_top_left(0.f, 0.f);
1023     gfx::PointF uv_bottom_right(
1024         static_cast<float>(size.width()) / frame_size_in_dip_.width(),
1025         static_cast<float>(size.height()) / frame_size_in_dip_.height());
1026     texture_layer_->SetUV(uv_top_left, uv_bottom_right);
1027   } else if (delegated_renderer_layer_.get() || surface_layer_.get()) {
1028     size.SetToMin(frame_size_in_dip_);
1029   }
1030   cc_layer_->SetBounds(size);
1031 }
1032
1033 void Layer::RecomputePosition() {
1034   cc_layer_->SetPosition(bounds_.origin() + subpixel_position_offset_);
1035 }
1036
1037 void Layer::AddAnimatorsInTreeToCollection(
1038     LayerAnimatorCollection* collection) {
1039   DCHECK(collection);
1040   if (IsAnimating())
1041     animator_->AddToCollection(collection);
1042   std::for_each(
1043       children_.begin(),
1044       children_.end(),
1045       std::bind2nd(std::mem_fun(&Layer::AddAnimatorsInTreeToCollection),
1046                    collection));
1047 }
1048
1049 void Layer::RemoveAnimatorsInTreeFromCollection(
1050     LayerAnimatorCollection* collection) {
1051   DCHECK(collection);
1052   if (IsAnimating())
1053     animator_->RemoveFromCollection(collection);
1054   std::for_each(
1055       children_.begin(),
1056       children_.end(),
1057       std::bind2nd(std::mem_fun(&Layer::RemoveAnimatorsInTreeFromCollection),
1058                    collection));
1059 }
1060
1061 bool Layer::IsAnimating() const {
1062   return animator_.get() && animator_->is_animating();
1063 }
1064
1065 }  // namespace ui