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// 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) {
UMA_HISTOGRAM_CUSTOM_COUNTS(
"Renderer4.InvalidationRegionApproximateRectCount",
region_.GetRegionComplexity(),
1,
5000,
50);
SimplifyIfNeeded();
region_.Swap(region);
}
void InvalidationRegion::Clear() {
region_.Clear();
}
void InvalidationRegion::Union(gfx::Rect rect) {
// TODO(vmpstr): We should simplify the region after Union() after we get a
// good idea of what kind of regions are typical (from the UMA histogram).
region_.Union(rect);
}
void InvalidationRegion::SimplifyIfNeeded() {
if (region_.GetRegionComplexity() > kMaxInvalidationRectCount)
region_ = region_.bounds();
}
} // namespace cc
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