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// Copyright (c) 2012 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 "content/browser/android/content_startup_flags.h"
#include "base/android/build_info.h"
#include "base/base_switches.h"
#include "base/command_line.h"
#include "base/logging.h"
#include "base/strings/string_number_conversions.h"
#include "base/sys_info.h"
#include "cc/base/switches.h"
#include "cc/trees/layer_tree_settings.h"
#include "content/public/browser/android/compositor.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/common/content_constants.h"
#include "content/public/common/content_switches.h"
#include "gpu/command_buffer/service/gpu_switches.h"
#include "ui/base/ui_base_switches.h"
#include "ui/native_theme/native_theme_switches.h"
namespace content {
void SetContentCommandLineFlags(bool single_process,
const std::string& plugin_descriptor) {
// May be called multiple times, to cover all possible program entry points.
static bool already_initialized = false;
if (already_initialized)
return;
already_initialized = true;
base::CommandLine* parsed_command_line =
base::CommandLine::ForCurrentProcess();
int command_line_renderer_limit = -1;
if (parsed_command_line->HasSwitch(switches::kRendererProcessLimit)) {
std::string limit = parsed_command_line->GetSwitchValueASCII(
switches::kRendererProcessLimit);
int value;
if (base::StringToInt(limit, &value)) {
command_line_renderer_limit = std::max(0, value);
}
}
if (command_line_renderer_limit > 0) {
int limit = std::min(command_line_renderer_limit,
static_cast<int>(kMaxRendererProcessCount));
RenderProcessHost::SetMaxRendererProcessCount(limit);
}
if (single_process || command_line_renderer_limit == 0) {
// Need to ensure the command line flag is consistent as a lot of chrome
// internal code checks this directly, but it wouldn't normally get set when
// we are implementing an embedded WebView.
parsed_command_line->AppendSwitch(switches::kSingleProcess);
}
parsed_command_line->AppendSwitch(cc::switches::kEnableBeginFrameScheduling);
parsed_command_line->AppendSwitch(switches::kEnablePinch);
parsed_command_line->AppendSwitch(switches::kEnableOverlayFullscreenVideo);
parsed_command_line->AppendSwitch(switches::kEnableOverlayScrollbar);
parsed_command_line->AppendSwitch(switches::kValidateInputEventStream);
// TODO(jdduke): Use the proper SDK version when available, crbug.com/466749.
if (base::android::BuildInfo::GetInstance()->sdk_int() >
base::android::SDK_VERSION_LOLLIPOP_MR1) {
parsed_command_line->AppendSwitch(switches::kEnableLongpressDragSelection);
parsed_command_line->AppendSwitchASCII(
switches::kTouchTextSelectionStrategy, "direction");
}
// There is no software fallback on Android, so don't limit GPU crashes.
parsed_command_line->AppendSwitch(switches::kDisableGpuProcessCrashLimit);
// On legacy low-memory devices the behavior has not been studied with regard
// to having an extra process with similar priority as the foreground renderer
// and given that the system will often be looking for a process to be killed
// on such systems.
if (base::SysInfo::IsLowEndDevice())
parsed_command_line->AppendSwitch(switches::kInProcessGPU);
parsed_command_line->AppendSwitch(switches::kEnableViewportMeta);
parsed_command_line->AppendSwitch(
switches::kMainFrameResizesAreOrientationChanges);
// Disable anti-aliasing.
parsed_command_line->AppendSwitch(
cc::switches::kDisableCompositedAntialiasing);
parsed_command_line->AppendSwitch(switches::kUIPrioritizeInGpuProcess);
parsed_command_line->AppendSwitch(switches::kEnableDelegatedRenderer);
if (!plugin_descriptor.empty()) {
parsed_command_line->AppendSwitchNative(
switches::kRegisterPepperPlugins, plugin_descriptor);
}
// Disable profiler timing by default.
if (!parsed_command_line->HasSwitch(switches::kProfilerTiming)) {
parsed_command_line->AppendSwitchASCII(
switches::kProfilerTiming, switches::kProfilerTimingDisabledValue);
}
cc::LayerSettings layer_settings;
if (parsed_command_line->HasSwitch(
switches::kEnableAndroidCompositorAnimationTimelines))
layer_settings.use_compositor_animation_timelines = true;
Compositor::SetLayerSettings(layer_settings);
}
} // namespace content
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