chromium/cc/trees/viewport_layers.h

// Copyright 2019 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_VIEWPORT_LAYERS_H_
#define CC_TREES_VIEWPORT_LAYERS_H_

#include "base/memory/ref_counted.h"
#include "cc/cc_export.h"
#include "cc/paint/element_id.h"

namespace cc {
class Layer;

// Viewport Layers are used to identify key layers to the compositor thread,
// so that it can perform viewport-based scrolling independently, such as
// for pinch-zoom or overscroll elasticity.
struct CC_EXPORT ViewportLayers { … };

}  // namespace cc

#endif  // CC_TREES_VIEWPORT_LAYERS_H_