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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/output/begin_frame_args.h"
#include "base/debug/trace_event_argument.h"
#include "ui/gfx/frame_time.h"
namespace cc {
const char* BeginFrameArgs::TypeToString(BeginFrameArgsType type) {
switch (type) {
case BeginFrameArgs::INVALID:
return "INVALID";
case BeginFrameArgs::NORMAL:
return "NORMAL";
case BeginFrameArgs::SYNCHRONOUS:
return "SYNCHRONOUS";
case BeginFrameArgs::MISSED:
return "MISSED";
case BeginFrameArgs::BEGIN_FRAME_ARGS_TYPE_MAX:
return "BEGIN_FRAME_ARGS_TYPE_MAX";
}
NOTREACHED();
return "???";
}
BeginFrameArgs::BeginFrameArgs()
: frame_time(base::TimeTicks()),
deadline(base::TimeTicks()),
interval(base::TimeDelta::FromMicroseconds(-1)),
type(BeginFrameArgs::INVALID) {
}
BeginFrameArgs::BeginFrameArgs(base::TimeTicks frame_time,
base::TimeTicks deadline,
base::TimeDelta interval,
BeginFrameArgs::BeginFrameArgsType type)
: frame_time(frame_time),
deadline(deadline),
interval(interval),
type(type) {
}
BeginFrameArgs BeginFrameArgs::Create(BeginFrameArgs::CreationLocation location,
base::TimeTicks frame_time,
base::TimeTicks deadline,
base::TimeDelta interval,
BeginFrameArgs::BeginFrameArgsType type) {
DCHECK_NE(type, BeginFrameArgs::INVALID);
DCHECK_NE(type, BeginFrameArgs::BEGIN_FRAME_ARGS_TYPE_MAX);
#ifdef NDEBUG
return BeginFrameArgs(frame_time, deadline, interval, type);
#else
BeginFrameArgs args = BeginFrameArgs(frame_time, deadline, interval, type);
args.created_from = location;
return args;
#endif
}
scoped_refptr<base::debug::ConvertableToTraceFormat> BeginFrameArgs::AsValue()
const {
scoped_refptr<base::debug::TracedValue> state =
new base::debug::TracedValue();
AsValueInto(state.get());
return state;
}
void BeginFrameArgs::AsValueInto(base::debug::TracedValue* state) const {
state->SetString("type", "BeginFrameArgs");
state->SetString("subtype", TypeToString(type));
state->SetDouble("frame_time_us", frame_time.ToInternalValue());
state->SetDouble("deadline_us", deadline.ToInternalValue());
state->SetDouble("interval_us", interval.InMicroseconds());
#ifndef NDEBUG
state->SetString("created_from", created_from.ToString());
#endif
}
// This is a hard-coded deadline adjustment that assumes 60Hz, to be used in
// cases where a good estimated draw time is not known. Using 1/3 of the vsync
// as the default adjustment gives the Browser the last 1/3 of a frame to
// produce output, the Renderer Impl thread the middle 1/3 of a frame to produce
// ouput, and the Renderer Main thread the first 1/3 of a frame to produce
// output.
base::TimeDelta BeginFrameArgs::DefaultEstimatedParentDrawTime() {
return base::TimeDelta::FromMicroseconds(16666 / 3);
}
base::TimeDelta BeginFrameArgs::DefaultInterval() {
return base::TimeDelta::FromMicroseconds(16666);
}
base::TimeDelta BeginFrameArgs::DefaultRetroactiveBeginFramePeriod() {
return base::TimeDelta::FromMicroseconds(4444);
}
} // namespace cc
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