root/cc/base/invalidation_region.cc

DEFINITIONS

1. Swap
2. Clear
3. Union
4. SimplifyIfNeeded

// 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) {
  region_.Swap(region);
}

void InvalidationRegion::Clear() {
  region_.Clear();
}

void InvalidationRegion::Union(const gfx::Rect& rect) {
  region_.Union(rect);
  SimplifyIfNeeded();
}

void InvalidationRegion::SimplifyIfNeeded() {
  if (region_.GetRegionComplexity() > kMaxInvalidationRectCount)
    region_ = region_.bounds();
}

}  // namespace cc