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// Copyright 2017 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 "components/viz/common/switches.h"
#include "base/command_line.h"
#include "base/strings/string_number_conversions.h"
#include "components/viz/common/constants.h"
namespace switches {
// The default number of the BeginFrames to wait to activate a surface with
// dependencies.
const char kDeadlineToSynchronizeSurfaces[] =
"deadline-to-synchronize-surfaces";
// Enables multi-client Surface synchronization. In practice, this indicates
// that LayerTreeHost expects to be given a valid viz::LocalSurfaceId provided
// by the parent compositor.
const char kEnableSurfaceSynchronization[] = "enable-surface-synchronization";
// Enables inspecting Viz Display Compositor objects. Default port is 9229.
// For local inspection use chrome://inspect#other
const char kEnableVizDevTools[] = "enable-viz-devtools";
// Effectively disables pipelining of compositor frame production stages by
// waiting for each stage to finish before completing a frame.
const char kRunAllCompositorStagesBeforeDraw[] =
"run-all-compositor-stages-before-draw";
// Enables the viz hit-test logic (HitTestAggregator and HitTestQuery), with
// hit-test data coming from surface layer.
const char kUseVizHitTestSurfaceLayer[] = "use-viz-hit-test-surface-layer";
base::Optional<uint32_t> GetDeadlineToSynchronizeSurfaces() {
base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
if (command_line->HasSwitch(switches::kRunAllCompositorStagesBeforeDraw)) {
// In full-pipeline mode, surface deadlines should always be unlimited.
return base::nullopt;
}
std::string deadline_to_synchronize_surfaces_string =
command_line->GetSwitchValueASCII(
switches::kDeadlineToSynchronizeSurfaces);
if (deadline_to_synchronize_surfaces_string.empty())
return viz::kDefaultActivationDeadlineInFrames;
uint32_t activation_deadline_in_frames;
if (!base::StringToUint(deadline_to_synchronize_surfaces_string,
&activation_deadline_in_frames)) {
return base::nullopt;
}
return activation_deadline_in_frames;
}
} // namespace switches
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