cc/base/invalidation_region.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "cc/base/invalidation_region.h"
   6
   7 #include "base/metrics/histogram.h"
   8
   9 namespace {
  10
  11 const int kMaxInvalidationRectCount = 256;
  12
  13 }  // namespace
  14
  15 namespace cc {
  16
  17 InvalidationRegion::InvalidationRegion() {}
  18
  19 InvalidationRegion::~InvalidationRegion() {}
  20
  21 void InvalidationRegion::Swap(Region* region) {
  22   region_.Swap(region);
  23 }
  24
  25 void InvalidationRegion::Clear() {
  26   region_.Clear();
  27 }
  28
  29 void InvalidationRegion::Union(const gfx::Rect& rect) {
  30   region_.Union(rect);
  31   SimplifyIfNeeded();
  32 }
  33
  34 void InvalidationRegion::SimplifyIfNeeded() {
  35   if (region_.GetRegionComplexity() > kMaxInvalidationRectCount)
  36     region_ = region_.bounds();
  37 }
  38
  39 }  // namespace cc