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// 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.
#ifndef CC_LAYER_TREE_HOST_H_
#define CC_LAYER_TREE_HOST_H_
#include <limits>
#include "base/basictypes.h"
#include "base/cancelable_callback.h"
#include "base/hash_tables.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/time.h"
#include "cc/animation/animation_events.h"
#include "cc/base/cc_export.h"
#include "cc/base/scoped_ptr_vector.h"
#include "cc/debug/rendering_stats.h"
#include "cc/layer_tree_host_client.h"
#include "cc/layer_tree_host_common.h"
#include "cc/layer_tree_settings.h"
#include "cc/occlusion_tracker.h"
#include "cc/output/output_surface.h"
#include "cc/proxy.h"
#include "cc/rate_limiter.h"
#include "skia/ext/refptr.h"
#include "third_party/skia/include/core/SkColor.h"
#include "third_party/skia/include/core/SkPicture.h"
#include "ui/gfx/rect.h"
#if defined(COMPILER_GCC)
namespace BASE_HASH_NAMESPACE {
template <>
struct hash<WebKit::WebGraphicsContext3D*> {
size_t operator()(WebKit::WebGraphicsContext3D* ptr) const {
return hash<size_t>()(reinterpret_cast<size_t>(ptr));
}
};
} // namespace BASE_HASH_NAMESPACE
#endif // COMPILER
namespace cc {
class AnimationRegistrar;
class HeadsUpDisplayLayer;
class Layer;
class LayerTreeHostImpl;
class LayerTreeHostImplClient;
class PrioritizedResourceManager;
class PrioritizedResource;
class Region;
class ResourceProvider;
class ResourceUpdateQueue;
class ScrollbarLayer;
class TopControlsManager;
struct ScrollAndScaleSet;
// Provides information on an Impl's rendering capabilities back to the
// LayerTreeHost.
struct CC_EXPORT RendererCapabilities {
RendererCapabilities();
~RendererCapabilities();
unsigned best_texture_format;
bool using_partial_swap;
bool using_accelerated_painting;
bool using_set_visibility;
bool using_swap_complete_callback;
bool using_gpu_memory_manager;
bool using_egl_image;
bool allow_partial_texture_updates;
bool using_offscreen_context3d;
int max_texture_size;
bool avoid_pow2_textures;
};
class CC_EXPORT LayerTreeHost : public RateLimiterClient {
public:
static scoped_ptr<LayerTreeHost> Create(LayerTreeHostClient* client,
const LayerTreeSettings& settings,
scoped_ptr<Thread> impl_thread);
virtual ~LayerTreeHost();
void SetSurfaceReady();
// Returns true if any LayerTreeHost is alive.
static bool AnyLayerTreeHostInstanceExists();
void set_needs_filter_context() { needs_filter_context_ = true; }
bool needs_offscreen_context() const {
return needs_filter_context_ || settings_.acceleratePainting;
}
// LayerTreeHost interface to Proxy.
void WillBeginFrame() { client_->willBeginFrame(); }
void DidBeginFrame();
void UpdateAnimations(base::TimeTicks monotonic_frame_begin_time);
void DidStopFlinging();
void Layout();
void BeginCommitOnImplThread(LayerTreeHostImpl* host_impl);
void FinishCommitOnImplThread(LayerTreeHostImpl* host_impl);
void SetPinchZoomScrollbarsBoundsAndPosition();
void CreateAndAddPinchZoomScrollbars();
void WillCommit();
void CommitComplete();
scoped_ptr<OutputSurface> CreateOutputSurface();
scoped_ptr<InputHandler> CreateInputHandler();
virtual scoped_ptr<LayerTreeHostImpl> CreateLayerTreeHostImpl(
LayerTreeHostImplClient* client);
void DidLoseOutputSurface();
enum RecreateResult {
RecreateSucceeded,
RecreateFailedButTryAgain,
RecreateFailedAndGaveUp,
};
RecreateResult RecreateOutputSurface();
void DidCommitAndDrawFrame() { client_->didCommitAndDrawFrame(); }
void DidCompleteSwapBuffers() { client_->didCompleteSwapBuffers(); }
void DeleteContentsTexturesOnImplThread(ResourceProvider* resource_provider);
virtual void AcquireLayerTextures();
// Returns false if we should abort this frame due to initialization failure.
bool InitializeRendererIfNeeded();
void UpdateLayers(ResourceUpdateQueue* queue,
size_t contents_memory_limit_bytes);
LayerTreeHostClient* client() { return client_; }
void Composite(base::TimeTicks frame_begin_time);
// Only used when compositing on the main thread.
void ScheduleComposite();
// Composites and attempts to read back the result into the provided
// buffer. If it wasn't possible, e.g. due to context lost, will return
// false.
bool CompositeAndReadback(void* pixels, gfx::Rect rect_in_device_viewport);
void FinishAllRendering();
void SetDeferCommits(bool defer_commits);
// Test only hook
virtual void DidDeferCommit();
int commit_number() const { return commit_number_; }
void CollectRenderingStats(RenderingStats* stats) const;
const RendererCapabilities& GetRendererCapabilities() const;
void SetNeedsAnimate();
virtual void SetNeedsCommit();
virtual void SetNeedsFullTreeSync();
void SetNeedsRedraw();
bool CommitRequested() const;
void SetAnimationEvents(scoped_ptr<AnimationEventsVector> events,
base::Time wall_clock_time);
void SetRootLayer(scoped_refptr<Layer> root_layer);
Layer* root_layer() { return root_layer_.get(); }
const Layer* root_layer() const { return root_layer_.get(); }
const Layer* RootScrollLayer() const;
const LayerTreeSettings& settings() const { return settings_; }
void SetDebugState(const LayerTreeDebugState& debug_state);
const LayerTreeDebugState& debug_state() const { return debug_state_; }
void SetViewportSize(gfx::Size layout_viewport_size,
gfx::Size device_viewport_size);
gfx::Size layout_viewport_size() const { return layout_viewport_size_; }
gfx::Size device_viewport_size() const { return device_viewport_size_; }
void SetPageScaleFactorAndLimits(float page_scale_factor,
float min_page_scale_factor,
float max_page_scale_factor);
void set_background_color(SkColor color) { background_color_ = color; }
void set_has_transparent_background(bool transparent) {
has_transparent_background_ = transparent;
}
PrioritizedResourceManager* contents_texture_manager() const {
return contents_texture_manager_.get();
}
void SetVisible(bool visible);
bool visible() const { return visible_; }
void StartPageScaleAnimation(gfx::Vector2d target_offset,
bool use_anchor,
float scale,
base::TimeDelta duration);
void ApplyScrollAndScale(const ScrollAndScaleSet& info);
void SetImplTransform(const gfx::Transform& transform);
void StartRateLimiter(WebKit::WebGraphicsContext3D* context3d);
void StopRateLimiter(WebKit::WebGraphicsContext3D* context3d);
// RateLimiterClient implementation.
virtual void RateLimit() OVERRIDE;
bool buffered_updates() const {
return settings_.maxPartialTextureUpdates !=
std::numeric_limits<size_t>::max();
}
bool RequestPartialTextureUpdate();
void SetDeviceScaleFactor(float device_scale_factor);
float device_scale_factor() const { return device_scale_factor_; }
void EnableHidingTopControls(bool enable);
HeadsUpDisplayLayer* hud_layer() const { return hud_layer_.get(); }
Proxy* proxy() const { return proxy_.get(); }
AnimationRegistrar* animation_registrar() const {
return animation_registrar_.get();
}
skia::RefPtr<SkPicture> CapturePicture();
bool BlocksPendingCommit() const;
// Obtains a thorough dump of the LayerTreeHost as a value.
scoped_ptr<base::Value> AsValue() const;
protected:
LayerTreeHost(LayerTreeHostClient* client, const LayerTreeSettings& settings);
bool Initialize(scoped_ptr<Thread> impl_thread);
bool InitializeForTesting(scoped_ptr<Proxy> proxy_for_testing);
private:
typedef std::vector<scoped_refptr<Layer> > LayerList;
bool InitializeProxy(scoped_ptr<Proxy> proxy);
void InitializeRenderer();
bool PaintLayerContents(const LayerList& render_surface_layer_list,
ResourceUpdateQueue* quue);
bool PaintMasksForRenderSurface(Layer* render_surface_layer,
ResourceUpdateQueue* queue);
void UpdateLayers(Layer* root_layer, ResourceUpdateQueue* queue);
void UpdateHudLayer();
void TriggerPrepaint();
void PrioritizeTextures(const LayerList& render_surface_layer_list,
OverdrawMetrics* metrics);
void SetPrioritiesForSurfaces(size_t surface_memory_bytes);
void SetPrioritiesForLayers(const LayerList& update_list);
size_t CalculateMemoryForRenderSurfaces(const LayerList& update_list);
void AnimateLayers(base::TimeTicks monotonic_time);
bool AnimateLayersRecursive(Layer* current, base::TimeTicks time);
void SetAnimationEventsRecursive(const AnimationEventsVector& events,
Layer* layer,
base::Time wall_clock_time);
bool animating_;
bool needs_full_tree_sync_;
bool needs_filter_context_;
base::CancelableClosure prepaint_callback_;
LayerTreeHostClient* client_;
scoped_ptr<Proxy> proxy_;
int commit_number_;
RenderingStats rendering_stats_;
bool renderer_initialized_;
bool output_surface_lost_;
int num_failed_recreate_attempts_;
scoped_refptr<Layer> root_layer_;
scoped_refptr<HeadsUpDisplayLayer> hud_layer_;
scoped_refptr<ScrollbarLayer> pinch_zoom_scrollbar_horizontal_;
scoped_refptr<ScrollbarLayer> pinch_zoom_scrollbar_vertical_;
scoped_ptr<PrioritizedResourceManager> contents_texture_manager_;
scoped_ptr<PrioritizedResource> surface_memory_placeholder_;
base::WeakPtr<TopControlsManager> top_controls_manager_weak_ptr_;
LayerTreeSettings settings_;
LayerTreeDebugState debug_state_;
gfx::Size layout_viewport_size_;
gfx::Size device_viewport_size_;
float device_scale_factor_;
bool visible_;
typedef base::hash_map<WebKit::WebGraphicsContext3D*,
scoped_refptr<RateLimiter> > RateLimiterMap;
RateLimiterMap rate_limiters_;
float page_scale_factor_;
float min_page_scale_factor_, max_page_scale_factor_;
gfx::Transform impl_transform_;
bool trigger_idle_updates_;
SkColor background_color_;
bool has_transparent_background_;
typedef ScopedPtrVector<PrioritizedResource> TextureList;
size_t partial_texture_update_requests_;
scoped_ptr<AnimationRegistrar> animation_registrar_;
DISALLOW_COPY_AND_ASSIGN(LayerTreeHost);
};
} // namespace cc
#endif // CC_LAYER_TREE_HOST_H_
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