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
cc / paint / element_id.cc [blame]
// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "cc/paint/element_id.h"
#include <inttypes.h>
#include <limits>
#include <ostream>
#include <string>
#include "base/strings/stringprintf.h"
#include "base/trace_event/traced_value.h"
namespace cc {
ElementId LayerIdToElementIdForTesting(int layer_id) {
// This intentionally returns an ElementId that is different from layer_id
// and is unlikely to conflict with other ElementIds. This ensures testing of
// our code not to depend on that the UI compositor uses ElementId(layer_id)
// as the element id of a layer.
return ElementId(std::numeric_limits<int>::max() - layer_id);
}
void ElementId::AddToTracedValue(base::trace_event::TracedValue* res) const {
res->BeginDictionary("element_id");
res->SetInteger("id_", id_);
res->EndDictionary();
}
std::string ElementId::ToString() const {
return base::StringPrintf("(%" PRIu64 ")", id_);
}
size_t ElementIdHash::operator()(ElementId key) const {
return std::hash<ElementId::InternalValue>()(key.id_);
}
std::ostream& operator<<(std::ostream& out, const ElementId& id) {
return out << id.ToString();
}
} // namespace cc