1 /*-*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
2 * This Source Code Form is subject to the terms of the Mozilla Public
3 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
4 * You can obtain one at http://mozilla.org/MPL/2.0/. */
6 #ifndef GFX_LAYER_TREE_INVALIDATION_H
7 #define GFX_LAYER_TREE_INVALIDATION_H
9 #include "nsRegion.h" // for nsIntRegion
21 * Callback for ContainerLayer invalidations.
23 * @param aContainer ContainerLayer being invalidated.
24 * @param aRegion Invalidated region in the ContainerLayer's coordinate
27 typedef void (*NotifySubDocInvalidationFunc
)(ContainerLayer
* aLayer
,
28 const nsIntRegion
& aRegion
);
31 * A set of cached layer properties (including those of child layers),
32 * used for comparing differences in layer trees.
34 struct LayerProperties
36 virtual ~LayerProperties() {}
39 * Copies the current layer tree properties into
40 * a new LayerProperties object.
42 * @param Layer tree to copy, or nullptr if we have no
45 static LayerProperties
* CloneFrom(Layer
* aRoot
);
48 * Clear all invalidation status from this layer tree.
50 static void ClearInvalidations(Layer
* aRoot
);
53 * Compares a set of existing layer tree properties to the current layer
54 * tree and generates the changed rectangle.
56 * @param aRoot Root layer of the layer tree to compare against.
57 * @param aCallback If specified, callback to call when ContainerLayers
59 * @return Painted area changed by the layer tree changes.
61 virtual nsIntRegion
ComputeDifferences(Layer
* aRoot
,
62 NotifySubDocInvalidationFunc aCallback
) = 0;
65 virtual void MoveBy(const nsIntPoint
& aOffset
) = 0;
69 } // namespace mozilla
71 #endif /* GFX_LAYER_TREE_INVALIDATON_H */