chromium/cc/layers/layer.h

// Copyright 2010 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_LAYERS_LAYER_H_
#define CC_LAYERS_LAYER_H_

#include <stddef.h>
#include <stdint.h>

#include <array>
#include <memory>
#include <set>
#include <string>
#include <vector>

#include "base/auto_reset.h"
#include "base/functional/callback.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/ref_counted.h"
#include "cc/base/protected_sequence_synchronizer.h"
#include "cc/base/region.h"
#include "cc/benchmarks/micro_benchmark.h"
#include "cc/cc_export.h"
#include "cc/input/hit_test_opaqueness.h"
#include "cc/input/scroll_snap_data.h"
#include "cc/layers/layer_collections.h"
#include "cc/layers/scroll_hit_test_rect.h"
#include "cc/layers/touch_action_region.h"
#include "cc/paint/element_id.h"
#include "cc/paint/filter_operations.h"
#include "cc/paint/node_id.h"
#include "cc/paint/paint_record.h"
#include "cc/trees/effect_node.h"
#include "cc/trees/property_tree.h"
#include "cc/trees/target_property.h"
#include "components/viz/common/surfaces/region_capture_bounds.h"
#include "components/viz/common/surfaces/subtree_capture_id.h"
#include "components/viz/common/view_transition_element_resource_id.h"
#include "third_party/skia/include/core/SkColor.h"
#include "ui/gfx/geometry/linear_gradient.h"
#include "ui/gfx/geometry/point3_f.h"
#include "ui/gfx/geometry/point_f.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/geometry/rounded_corners_f.h"

namespace viz {
class CopyOutputRequest;
}

namespace cc {

class LayerImpl;
class LayerTreeHost;
class LayerTreeHostCommon;
class LayerTreeImpl;
class PictureLayer;

struct CommitState;
struct ThreadUnsafeCommitState;

// For tracing and debugging. The info will be attached to this layer's tracing
// output.
struct CC_EXPORT LayerDebugInfo { … };

// Base class for composited layers. Special layer types are derived from
// this class. Each layer is an independent unit in the compositor, be that
// for transforming or for content. If a layer has content it can be
// transformed efficiently without requiring the content to be recreated.
// Layers form a tree, with each layer having 0 or more children, and a single
// parent (or none at the root). Layers within the tree, other than the root
// layer, are kept alive by that tree relationship, with refpointer ownership
// from parents to children.
class CC_EXPORT Layer : public base::RefCounted<Layer>,
                        public ProtectedSequenceSynchronizer { … };

}  // namespace cc

#endif  // CC_LAYERS_LAYER_H_