blob: e5aef8a3034275739d50627a4a20be43114ed1d2 [file] [log] [blame]
// Copyright 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "cc/trees/layer_tree_impl.h"
#include "base/debug/trace_event.h"
#include "cc/animation/keyframed_animation_curve.h"
#include "cc/animation/scrollbar_animation_controller.h"
#include "cc/debug/traced_value.h"
#include "cc/layers/heads_up_display_layer_impl.h"
#include "cc/layers/render_surface_impl.h"
#include "cc/layers/scrollbar_layer_impl.h"
#include "cc/trees/layer_tree_host_common.h"
#include "cc/trees/layer_tree_host_impl.h"
#include "ui/gfx/size_conversions.h"
#include "ui/gfx/vector2d_conversions.h"
namespace cc {
LayerTreeImpl::LayerTreeImpl(LayerTreeHostImpl* layer_tree_host_impl)
: layer_tree_host_impl_(layer_tree_host_impl),
source_frame_number_(-1),
hud_layer_(0),
root_scroll_layer_(NULL),
currently_scrolling_layer_(NULL),
root_layer_scroll_offset_delegate_(NULL),
background_color_(0),
has_transparent_background_(false),
page_scale_factor_(1),
page_scale_delta_(1),
sent_page_scale_delta_(1),
min_page_scale_factor_(0),
max_page_scale_factor_(0),
scrolling_layer_id_from_previous_tree_(0),
contents_textures_purged_(false),
viewport_size_invalid_(false),
needs_update_draw_properties_(true),
needs_full_tree_sync_(true) {
}
LayerTreeImpl::~LayerTreeImpl() {
// Need to explicitly clear the tree prior to destroying this so that
// the LayerTreeImpl pointer is still valid in the LayerImpl dtor.
root_layer_.reset();
}
static LayerImpl* FindRootScrollLayerRecursive(LayerImpl* layer) {
if (!layer)
return NULL;
if (layer->scrollable())
return layer;
for (size_t i = 0; i < layer->children().size(); ++i) {
LayerImpl* found = FindRootScrollLayerRecursive(layer->children()[i]);
if (found)
return found;
}
return NULL;
}
void LayerTreeImpl::SetRootLayer(scoped_ptr<LayerImpl> layer) {
if (root_scroll_layer_)
root_scroll_layer_->SetScrollOffsetDelegate(NULL);
root_layer_ = layer.Pass();
currently_scrolling_layer_ = NULL;
root_scroll_layer_ = NULL;
layer_tree_host_impl_->OnCanDrawStateChangedForTree();
}
void LayerTreeImpl::FindRootScrollLayer() {
root_scroll_layer_ = FindRootScrollLayerRecursive(root_layer_.get());
if (root_scroll_layer_) {
root_scroll_layer_->SetScrollOffsetDelegate(
root_layer_scroll_offset_delegate_);
}
if (scrolling_layer_id_from_previous_tree_) {
currently_scrolling_layer_ = LayerTreeHostCommon::FindLayerInSubtree(
root_layer_.get(),
scrolling_layer_id_from_previous_tree_);
}
scrolling_layer_id_from_previous_tree_ = 0;
}
scoped_ptr<LayerImpl> LayerTreeImpl::DetachLayerTree() {
// Clear all data structures that have direct references to the layer tree.
scrolling_layer_id_from_previous_tree_ =
currently_scrolling_layer_ ? currently_scrolling_layer_->id() : 0;
if (root_scroll_layer_)
root_scroll_layer_->SetScrollOffsetDelegate(NULL);
root_scroll_layer_ = NULL;
currently_scrolling_layer_ = NULL;
render_surface_layer_list_.clear();
set_needs_update_draw_properties();
return root_layer_.Pass();
}
void LayerTreeImpl::PushPropertiesTo(LayerTreeImpl* target_tree) {
target_tree->SetLatencyInfo(latency_info_);
latency_info_.Clear();
target_tree->SetPageScaleFactorAndLimits(
page_scale_factor(), min_page_scale_factor(), max_page_scale_factor());
target_tree->SetPageScaleDelta(
target_tree->page_scale_delta() / target_tree->sent_page_scale_delta());
target_tree->set_sent_page_scale_delta(1);
// This should match the property synchronization in
// LayerTreeHost::finishCommitOnImplThread().
target_tree->set_source_frame_number(source_frame_number());
target_tree->set_background_color(background_color());
target_tree->set_has_transparent_background(has_transparent_background());
if (ContentsTexturesPurged())
target_tree->SetContentsTexturesPurged();
else
target_tree->ResetContentsTexturesPurged();
if (ViewportSizeInvalid())
target_tree->SetViewportSizeInvalid();
else
target_tree->ResetViewportSizeInvalid();
if (hud_layer())
target_tree->set_hud_layer(static_cast<HeadsUpDisplayLayerImpl*>(
LayerTreeHostCommon::FindLayerInSubtree(
target_tree->root_layer(), hud_layer()->id())));
else
target_tree->set_hud_layer(NULL);
}
LayerImpl* LayerTreeImpl::RootScrollLayer() const {
return root_scroll_layer_;
}
LayerImpl* LayerTreeImpl::RootClipLayer() const {
return root_scroll_layer_ ? root_scroll_layer_->parent() : NULL;
}
LayerImpl* LayerTreeImpl::CurrentlyScrollingLayer() const {
DCHECK(IsActiveTree());
return currently_scrolling_layer_;
}
void LayerTreeImpl::SetCurrentlyScrollingLayer(LayerImpl* layer) {
if (currently_scrolling_layer_ == layer)
return;
if (currently_scrolling_layer_ &&
currently_scrolling_layer_->scrollbar_animation_controller())
currently_scrolling_layer_->scrollbar_animation_controller()->
DidScrollGestureEnd(CurrentPhysicalTimeTicks());
currently_scrolling_layer_ = layer;
if (layer && layer->scrollbar_animation_controller())
layer->scrollbar_animation_controller()->DidScrollGestureBegin();
}
void LayerTreeImpl::ClearCurrentlyScrollingLayer() {
SetCurrentlyScrollingLayer(NULL);
scrolling_layer_id_from_previous_tree_ = 0;
}
void LayerTreeImpl::SetPageScaleFactorAndLimits(float page_scale_factor,
float min_page_scale_factor, float max_page_scale_factor) {
if (!page_scale_factor)
return;
min_page_scale_factor_ = min_page_scale_factor;
max_page_scale_factor_ = max_page_scale_factor;
page_scale_factor_ = page_scale_factor;
}
void LayerTreeImpl::SetPageScaleDelta(float delta) {
// Clamp to the current min/max limits.
float total = page_scale_factor_ * delta;
if (min_page_scale_factor_ && total < min_page_scale_factor_)
delta = min_page_scale_factor_ / page_scale_factor_;
else if (max_page_scale_factor_ && total > max_page_scale_factor_)
delta = max_page_scale_factor_ / page_scale_factor_;
if (delta == page_scale_delta_)
return;
page_scale_delta_ = delta;
if (IsActiveTree()) {
LayerTreeImpl* pending_tree = layer_tree_host_impl_->pending_tree();
if (pending_tree) {
DCHECK_EQ(1, pending_tree->sent_page_scale_delta());
pending_tree->SetPageScaleDelta(
page_scale_delta_ / sent_page_scale_delta_);
}
}
UpdateMaxScrollOffset();
set_needs_update_draw_properties();
}
gfx::SizeF LayerTreeImpl::ScrollableViewportSize() const {
return gfx::ScaleSize(layer_tree_host_impl_->VisibleViewportSize(),
1.0f / total_page_scale_factor());
}
void LayerTreeImpl::UpdateMaxScrollOffset() {
LayerImpl* root_scroll = RootScrollLayer();
if (!root_scroll || !root_scroll->children().size())
return;
gfx::Vector2dF max_scroll = gfx::Rect(ScrollableSize()).bottom_right() -
gfx::RectF(ScrollableViewportSize()).bottom_right();
// The scrollable viewport size is based on device viewport instead of Blink's
// container layer, so we need to adjust for non-overlay scrollbars.
ScrollbarLayerImpl* horiz = root_scroll->horizontal_scrollbar_layer();
ScrollbarLayerImpl* vertical = root_scroll->vertical_scrollbar_layer();
if (horiz && !horiz->is_overlay_scrollbar())
max_scroll.set_y(max_scroll.y() + horiz->thumb_thickness());
if (vertical && !vertical->is_overlay_scrollbar())
max_scroll.set_x(max_scroll.x() + vertical->thumb_thickness());
// The viewport may be larger than the contents in some cases, such as
// having a vertical scrollbar but no horizontal overflow.
max_scroll.SetToMax(gfx::Vector2dF());
root_scroll_layer_->SetMaxScrollOffset(gfx::ToFlooredVector2d(max_scroll));
}
void LayerTreeImpl::UpdateSolidColorScrollbars() {
DCHECK(settings().solid_color_scrollbars);
LayerImpl* root_scroll = RootScrollLayer();
DCHECK(root_scroll);
DCHECK(IsActiveTree());
gfx::RectF scrollable_viewport(
gfx::PointAtOffsetFromOrigin(root_scroll->TotalScrollOffset()),
ScrollableViewportSize());
float vertical_adjust = 0.0f;
if (RootClipLayer())
vertical_adjust = layer_tree_host_impl_->VisibleViewportSize().height() -
RootClipLayer()->bounds().height();
if (ScrollbarLayerImpl* horiz = root_scroll->horizontal_scrollbar_layer()) {
horiz->set_vertical_adjust(vertical_adjust);
horiz->set_visible_to_total_length_ratio(
scrollable_viewport.width() / ScrollableSize().width());
}
if (ScrollbarLayerImpl* vertical = root_scroll->vertical_scrollbar_layer()) {
vertical->set_vertical_adjust(vertical_adjust);
vertical->set_visible_to_total_length_ratio(
scrollable_viewport.height() / ScrollableSize().height());
}
}
void LayerTreeImpl::UpdateDrawProperties() {
if (IsActiveTree() && RootScrollLayer() && RootClipLayer())
UpdateRootScrollLayerSizeDelta();
if (settings().solid_color_scrollbars &&
IsActiveTree() &&
RootScrollLayer()) {
UpdateSolidColorScrollbars();
// The top controls manager is incompatible with the WebKit-created cliprect
// because it can bring into view a larger amount of content when it
// hides. It's safe to deactivate the clip rect if no non-overlay scrollbars
// are present.
if (RootClipLayer() && layer_tree_host_impl_->top_controls_manager())
RootClipLayer()->SetMasksToBounds(false);
}
needs_update_draw_properties_ = false;
render_surface_layer_list_.clear();
// For max_texture_size.
if (!layer_tree_host_impl_->renderer())
return;
if (!root_layer())
return;
{
TRACE_EVENT2("cc",
"LayerTreeImpl::UpdateDrawProperties",
"IsActive",
IsActiveTree(),
"SourceFrameNumber",
source_frame_number_);
LayerTreeHostCommon::CalculateDrawProperties(
root_layer(),
layer_tree_host_impl_->DeviceViewport().size(),
layer_tree_host_impl_->DeviceTransform(),
device_scale_factor(),
total_page_scale_factor(),
root_scroll_layer_,
MaxTextureSize(),
settings().can_use_lcd_text,
settings().layer_transforms_should_scale_layer_contents,
&render_surface_layer_list_);
}
DCHECK(!needs_update_draw_properties_) <<
"CalcDrawProperties should not set_needs_update_draw_properties()";
}
const LayerImplList& LayerTreeImpl::RenderSurfaceLayerList() const {
// If this assert triggers, then the list is dirty.
DCHECK(!needs_update_draw_properties_);
return render_surface_layer_list_;
}
gfx::Size LayerTreeImpl::ScrollableSize() const {
if (!root_scroll_layer_ || root_scroll_layer_->children().empty())
return gfx::Size();
return root_scroll_layer_->children()[0]->bounds();
}
LayerImpl* LayerTreeImpl::LayerById(int id) {
LayerIdMap::iterator iter = layer_id_map_.find(id);
return iter != layer_id_map_.end() ? iter->second : NULL;
}
void LayerTreeImpl::RegisterLayer(LayerImpl* layer) {
DCHECK(!LayerById(layer->id()));
layer_id_map_[layer->id()] = layer;
}
void LayerTreeImpl::UnregisterLayer(LayerImpl* layer) {
DCHECK(LayerById(layer->id()));
layer_id_map_.erase(layer->id());
}
void LayerTreeImpl::PushPersistedState(LayerTreeImpl* pending_tree) {
pending_tree->SetCurrentlyScrollingLayer(
LayerTreeHostCommon::FindLayerInSubtree(pending_tree->root_layer(),
currently_scrolling_layer_ ? currently_scrolling_layer_->id() : 0));
pending_tree->SetLatencyInfo(latency_info_);
latency_info_.Clear();
}
static void DidBecomeActiveRecursive(LayerImpl* layer) {
layer->DidBecomeActive();
for (size_t i = 0; i < layer->children().size(); ++i)
DidBecomeActiveRecursive(layer->children()[i]);
}
void LayerTreeImpl::DidBecomeActive() {
if (root_layer())
DidBecomeActiveRecursive(root_layer());
FindRootScrollLayer();
UpdateMaxScrollOffset();
}
bool LayerTreeImpl::ContentsTexturesPurged() const {
return contents_textures_purged_;
}
void LayerTreeImpl::SetContentsTexturesPurged() {
if (contents_textures_purged_)
return;
contents_textures_purged_ = true;
layer_tree_host_impl_->OnCanDrawStateChangedForTree();
}
void LayerTreeImpl::ResetContentsTexturesPurged() {
if (!contents_textures_purged_)
return;
contents_textures_purged_ = false;
layer_tree_host_impl_->OnCanDrawStateChangedForTree();
}
bool LayerTreeImpl::ViewportSizeInvalid() const {
return viewport_size_invalid_;
}
void LayerTreeImpl::SetViewportSizeInvalid() {
viewport_size_invalid_ = true;
layer_tree_host_impl_->OnCanDrawStateChangedForTree();
}
void LayerTreeImpl::ResetViewportSizeInvalid() {
viewport_size_invalid_ = false;
layer_tree_host_impl_->OnCanDrawStateChangedForTree();
}
Proxy* LayerTreeImpl::proxy() const {
return layer_tree_host_impl_->proxy();
}
const LayerTreeSettings& LayerTreeImpl::settings() const {
return layer_tree_host_impl_->settings();
}
const RendererCapabilities& LayerTreeImpl::GetRendererCapabilities() const {
return layer_tree_host_impl_->GetRendererCapabilities();
}
OutputSurface* LayerTreeImpl::output_surface() const {
return layer_tree_host_impl_->output_surface();
}
ResourceProvider* LayerTreeImpl::resource_provider() const {
return layer_tree_host_impl_->resource_provider();
}
TileManager* LayerTreeImpl::tile_manager() const {
return layer_tree_host_impl_->tile_manager();
}
FrameRateCounter* LayerTreeImpl::frame_rate_counter() const {
return layer_tree_host_impl_->fps_counter();
}
PaintTimeCounter* LayerTreeImpl::paint_time_counter() const {
return layer_tree_host_impl_->paint_time_counter();
}
MemoryHistory* LayerTreeImpl::memory_history() const {
return layer_tree_host_impl_->memory_history();
}
bool LayerTreeImpl::IsActiveTree() const {
return layer_tree_host_impl_->active_tree() == this;
}
bool LayerTreeImpl::IsPendingTree() const {
return layer_tree_host_impl_->pending_tree() == this;
}
bool LayerTreeImpl::IsRecycleTree() const {
return layer_tree_host_impl_->recycle_tree() == this;
}
LayerImpl* LayerTreeImpl::FindActiveTreeLayerById(int id) {
LayerTreeImpl* tree = layer_tree_host_impl_->active_tree();
if (!tree)
return NULL;
return tree->LayerById(id);
}
LayerImpl* LayerTreeImpl::FindPendingTreeLayerById(int id) {
LayerTreeImpl* tree = layer_tree_host_impl_->pending_tree();
if (!tree)
return NULL;
return tree->LayerById(id);
}
int LayerTreeImpl::MaxTextureSize() const {
return layer_tree_host_impl_->GetRendererCapabilities().max_texture_size;
}
bool LayerTreeImpl::PinchGestureActive() const {
return layer_tree_host_impl_->pinch_gesture_active();
}
base::TimeTicks LayerTreeImpl::CurrentFrameTimeTicks() const {
return layer_tree_host_impl_->CurrentFrameTimeTicks();
}
base::Time LayerTreeImpl::CurrentFrameTime() const {
return layer_tree_host_impl_->CurrentFrameTime();
}
base::TimeTicks LayerTreeImpl::CurrentPhysicalTimeTicks() const {
return layer_tree_host_impl_->CurrentPhysicalTimeTicks();
}
void LayerTreeImpl::SetNeedsCommit() {
layer_tree_host_impl_->SetNeedsCommit();
}
void LayerTreeImpl::SetNeedsRedraw() {
layer_tree_host_impl_->SetNeedsRedraw();
}
const LayerTreeDebugState& LayerTreeImpl::debug_state() const {
return layer_tree_host_impl_->debug_state();
}
float LayerTreeImpl::device_scale_factor() const {
return layer_tree_host_impl_->device_scale_factor();
}
gfx::Size LayerTreeImpl::device_viewport_size() const {
return layer_tree_host_impl_->device_viewport_size();
}
DebugRectHistory* LayerTreeImpl::debug_rect_history() const {
return layer_tree_host_impl_->debug_rect_history();
}
AnimationRegistrar* LayerTreeImpl::animationRegistrar() const {
return layer_tree_host_impl_->animation_registrar();
}
scoped_ptr<base::Value> LayerTreeImpl::AsValue() const {
scoped_ptr<base::DictionaryValue> state(new base::DictionaryValue());
TracedValue::MakeDictIntoImplicitSnapshot(
state.get(), "cc::LayerTreeImpl", this);
state->Set("root_layer", root_layer_->AsValue().release());
scoped_ptr<base::ListValue> render_surface_layer_list(new base::ListValue());
typedef LayerIterator<LayerImpl,
LayerImplList,
RenderSurfaceImpl,
LayerIteratorActions::BackToFront> LayerIteratorType;
LayerIteratorType end = LayerIteratorType::End(&render_surface_layer_list_);
for (LayerIteratorType it = LayerIteratorType::Begin(
&render_surface_layer_list_); it != end; ++it) {
if (!it.represents_itself())
continue;
render_surface_layer_list->Append(TracedValue::CreateIDRef(*it).release());
}
state->Set("render_surface_layer_list",
render_surface_layer_list.release());
return state.PassAs<base::Value>();
}
void LayerTreeImpl::SetRootLayerScrollOffsetDelegate(
LayerScrollOffsetDelegate* root_layer_scroll_offset_delegate) {
root_layer_scroll_offset_delegate_ = root_layer_scroll_offset_delegate;
if (root_scroll_layer_) {
root_scroll_layer_->SetScrollOffsetDelegate(
root_layer_scroll_offset_delegate_);
}
}
void LayerTreeImpl::UpdateRootScrollLayerSizeDelta() {
LayerImpl* root_scroll = RootScrollLayer();
LayerImpl* root_clip = RootClipLayer();
DCHECK(root_scroll);
DCHECK(root_clip);
DCHECK(IsActiveTree());
gfx::Vector2dF scrollable_viewport_size =
gfx::RectF(ScrollableViewportSize()).bottom_right() - gfx::PointF();
gfx::Vector2dF original_viewport_size =
gfx::RectF(root_clip->bounds()).bottom_right() -
gfx::PointF();
original_viewport_size.Scale(1 / page_scale_factor());
root_scroll->SetFixedContainerSizeDelta(
scrollable_viewport_size - original_viewport_size);
}
void LayerTreeImpl::SetLatencyInfo(const ui::LatencyInfo& latency_info) {
latency_info_.MergeWith(latency_info);
}
const ui::LatencyInfo& LayerTreeImpl::GetLatencyInfo() {
return latency_info_;
}
void LayerTreeImpl::ClearLatencyInfo() {
latency_info_.Clear();
}
void LayerTreeImpl::WillModifyTilePriorities() {
layer_tree_host_impl_->SetNeedsManageTiles();
}
void LayerTreeImpl::AddLayerWithCopyOutputRequest(LayerImpl* layer) {
// Only the active tree needs to know about layers with copy requests, as
// they are aborted if not serviced during draw.
DCHECK(IsActiveTree());
DCHECK(std::find(layers_with_copy_output_request_.begin(),
layers_with_copy_output_request_.end(),
layer) == layers_with_copy_output_request_.end());
layers_with_copy_output_request_.push_back(layer);
}
void LayerTreeImpl::RemoveLayerWithCopyOutputRequest(LayerImpl* layer) {
// Only the active tree needs to know about layers with copy requests, as
// they are aborted if not serviced during draw.
DCHECK(IsActiveTree());
std::vector<LayerImpl*>::iterator it = std::find(
layers_with_copy_output_request_.begin(),
layers_with_copy_output_request_.end(),
layer);
DCHECK(it != layers_with_copy_output_request_.end());
if (it != layers_with_copy_output_request_.end())
layers_with_copy_output_request_.erase(it);
}
const std::vector<LayerImpl*> LayerTreeImpl::LayersWithCopyOutputRequest()
const {
// Only the active tree needs to know about layers with copy requests, as
// they are aborted if not serviced during draw.
DCHECK(IsActiveTree());
return layers_with_copy_output_request_;
}
} // namespace cc