DamageAccumulator.h revision e4267ea4f20740c37c01bfb6aefcf61fddc4566a 
1/*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16#ifndef DAMAGEACCUMULATOR_H
17#define DAMAGEACCUMULATOR_H
18
19#include <utils/LinearAllocator.h>
20
21#include <SkMatrix.h>
22#include <SkRect.h>
23
24#include "utils/Macros.h"
25
26namespace android {
27namespace uirenderer {
28
29struct DirtyStack;
30class RenderNode;
31
32class DamageAccumulator {
33    PREVENT_COPY_AND_ASSIGN(DamageAccumulator);
34public:
35    DamageAccumulator();
36    // mAllocator will clean everything up for us, no need for a dtor
37
38    // Push a transform node onto the stack. This should be called prior
39    // to any dirty() calls. Subsequent calls to dirty()
40    // will be affected by the node's transform when popNode() is called.
41    void pushNode(const RenderNode* node);
42    // Pops a transform node from the stack, propagating the dirty rect
43    // up to the parent node.
44    void popNode();
45    void dirty(float left, float top, float right, float bottom);
46
47    void finish(SkRect* totalDirty);
48
49private:
50    LinearAllocator mAllocator;
51    DirtyStack* mHead;
52};
53
54} /* namespace uirenderer */
55} /* namespace android */
56
57#endif /* DAMAGEACCUMULATOR_H */
58