1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "content/browser/android/content_startup_flags.h" 6 7 #include "base/base_switches.h" 8 #include "base/command_line.h" 9 #include "base/logging.h" 10 #include "base/strings/string_number_conversions.h" 11 #include "cc/base/switches.h" 12 #include "content/public/browser/render_process_host.h" 13 #include "content/public/common/content_constants.h" 14 #include "content/public/common/content_switches.h" 15 #include "gpu/command_buffer/service/gpu_switches.h" 16 #include "ui/base/ui_base_switches.h" 17 #include "ui/native_theme/native_theme_switches.h" 18 19 namespace content { 20 SetContentCommandLineFlags(int max_render_process_count,const std::string & plugin_descriptor)21void SetContentCommandLineFlags(int max_render_process_count, 22 const std::string& plugin_descriptor) { 23 // May be called multiple times, to cover all possible program entry points. 24 static bool already_initialized = false; 25 if (already_initialized) 26 return; 27 already_initialized = true; 28 29 CommandLine* parsed_command_line = CommandLine::ForCurrentProcess(); 30 31 int command_line_renderer_limit = -1; 32 if (parsed_command_line->HasSwitch(switches::kRendererProcessLimit)) { 33 std::string limit = parsed_command_line->GetSwitchValueASCII( 34 switches::kRendererProcessLimit); 35 int value; 36 if (base::StringToInt(limit, &value)) { 37 command_line_renderer_limit = value; 38 if (value <= 0) 39 max_render_process_count = 0; 40 } 41 } 42 43 if (command_line_renderer_limit > 0) { 44 int limit = std::min(command_line_renderer_limit, 45 static_cast<int>(kMaxRendererProcessCount)); 46 RenderProcessHost::SetMaxRendererProcessCount(limit); 47 } else if (max_render_process_count <= 0) { 48 // Need to ensure the command line flag is consistent as a lot of chrome 49 // internal code checks this directly, but it wouldn't normally get set when 50 // we are implementing an embedded WebView. 51 parsed_command_line->AppendSwitch(switches::kSingleProcess); 52 } else { 53 int default_maximum = RenderProcessHost::GetMaxRendererProcessCount(); 54 DCHECK(default_maximum <= static_cast<int>(kMaxRendererProcessCount)); 55 if (max_render_process_count < default_maximum) 56 RenderProcessHost::SetMaxRendererProcessCount(max_render_process_count); 57 } 58 59 parsed_command_line->AppendSwitch(switches::kEnableThreadedCompositing); 60 parsed_command_line->AppendSwitch( 61 switches::kEnableCompositingForFixedPosition); 62 parsed_command_line->AppendSwitch(switches::kEnableAcceleratedOverflowScroll); 63 parsed_command_line->AppendSwitch(switches::kEnableBeginFrameScheduling); 64 65 parsed_command_line->AppendSwitch(switches::kEnableGestureTapHighlight); 66 parsed_command_line->AppendSwitch(switches::kEnablePinch); 67 parsed_command_line->AppendSwitch(switches::kEnableOverlayFullscreenVideo); 68 parsed_command_line->AppendSwitch(switches::kEnableOverlayScrollbar); 69 parsed_command_line->AppendSwitch(switches::kEnableOverscrollNotifications); 70 71 // Run the GPU service as a thread in the browser instead of as a 72 // standalone process. 73 parsed_command_line->AppendSwitch(switches::kInProcessGPU); 74 parsed_command_line->AppendSwitch(switches::kDisableGpuShaderDiskCache); 75 76 parsed_command_line->AppendSwitch(switches::kEnableViewport); 77 parsed_command_line->AppendSwitch(switches::kEnableViewportMeta); 78 parsed_command_line->AppendSwitch( 79 switches::kMainFrameResizesAreOrientationChanges); 80 81 // Disable anti-aliasing. 82 parsed_command_line->AppendSwitch( 83 cc::switches::kDisableCompositedAntialiasing); 84 85 parsed_command_line->AppendSwitch(switches::kUIPrioritizeInGpuProcess); 86 87 parsed_command_line->AppendSwitch(switches::kEnableDelegatedRenderer); 88 89 if (!plugin_descriptor.empty()) { 90 parsed_command_line->AppendSwitchNative( 91 switches::kRegisterPepperPlugins, plugin_descriptor); 92 } 93 94 // Disable profiler timing by default. 95 if (!parsed_command_line->HasSwitch(switches::kProfilerTiming)) { 96 parsed_command_line->AppendSwitchASCII( 97 switches::kProfilerTiming, switches::kProfilerTimingDisabledValue); 98 } 99 } 100 101 } // namespace content 102