blob: 09591562c9debe7923a3e86cb86a039be9c15f64 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "cc/base/invalidation_region.h"
#include "base/metrics/histogram.h"
namespace {
const int kMaxInvalidationRectCount = 256;
} // namespace
namespace cc {
InvalidationRegion::InvalidationRegion() {}
InvalidationRegion::~InvalidationRegion() {}
void InvalidationRegion::Swap(Region* region) {
FinalizePendingRects();
region_.Swap(region);
}
void InvalidationRegion::Clear() {
pending_rects_.clear();
region_.Clear();
}
void InvalidationRegion::Union(const gfx::Rect& rect) {
if (pending_rects_.size() >= kMaxInvalidationRectCount)
pending_rects_[0].Union(rect);
else
pending_rects_.push_back(rect);
}
void InvalidationRegion::FinalizePendingRects() {
if (pending_rects_.empty())
return;
if (region_.GetRegionComplexity() + pending_rects_.size() >
kMaxInvalidationRectCount) {
gfx::Rect pending_bounds = region_.bounds();
for (auto& rect : pending_rects_)
pending_bounds.Union(rect);
region_ = pending_bounds;
} else {
for (auto& rect : pending_rects_)
region_.Union(rect);
}
pending_rects_.clear();
}
} // namespace cc
|
