layer_tree_host_client.h | Explore in Territory

// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CC_TREES_LAYER_TREE_HOST_CLIENT_H_
#define CC_TREES_LAYER_TREE_HOST_CLIENT_H_

#include <memory>
#include <string>

#include "base/time/time.h"
#include "cc/cc_export.h"
#include "cc/input/browser_controls_state.h"
#include "cc/metrics/frame_sequence_tracker_collection.h"
#include "cc/trees/paint_holding_commit_trigger.h"
#include "cc/trees/paint_holding_reason.h"
#include "cc/trees/property_tree.h"
#include "components/viz/common/frame_timing_details.h"
#include "ui/gfx/geometry/vector2d_f.h"

namespace viz {
struct BeginFrameArgs;
}

namespace cc {
struct BeginMainFrameMetrics;
struct CommitState;
struct WebVitalMetrics;

struct ApplyViewportChangesArgs { … };

ManipulationInfo;
constexpr ManipulationInfo kManipulationInfoNone = …;
constexpr ManipulationInfo kManipulationInfoWheel = …;
constexpr ManipulationInfo kManipulationInfoTouch = …;
constexpr ManipulationInfo kManipulationInfoPrecisionTouchPad = …;
constexpr ManipulationInfo kManipulationInfoPinchZoom = …;
constexpr ManipulationInfo kManipulationInfoScrollbar = …;

struct PaintBenchmarkResult { … };

// A LayerTreeHost is bound to a LayerTreeHostClient. The main rendering
// loop (in ProxyMain or SingleThreadProxy) calls methods on the
// LayerTreeHost, which then handles them and also calls into the equivalent
// methods on its LayerTreeHostClient when applicable.
//
// One important example of a LayerTreeHostClient is (via additional
// indirections) Blink.
//
// Note: Some API callbacks below are tied to a frame. Since LayerTreeHost
// maintains a pipeline of frames, it can be ambiguous which frame the callback
// is associated with. We rely on `source_frame_number` to tie the callback to
// its associated frame. See LayerTreeHost::SourceFrameNumber for details.
class CC_EXPORT LayerTreeHostClient { … };

// LayerTreeHost->WebThreadScheduler callback interface. Instances of this class
// must be safe to use on both the compositor and main threads.
class LayerTreeHostSchedulingClient { … };

}  // namespace cc

#endif  // CC_TREES_LAYER_TREE_HOST_CLIENT_H_
chromium/cc/trees/layer_tree_host_client.h
