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/command_line.h" 8 #include "base/logging.h" 9 #include "base/strings/string_number_conversions.h" 10 #include "cc/base/switches.h" 11 #include "content/public/browser/render_process_host.h" 12 #include "content/public/common/content_constants.h" 13 #include "content/public/common/content_switches.h" 14 #include "gpu/command_buffer/service/gpu_switches.h" 15 #include "ui/base/ui_base_switches.h" 16 17 namespace content { 18 19 void SetContentCommandLineFlags(int max_render_process_count, 20 const std::string& plugin_descriptor) { 21 // May be called multiple times, to cover all possible program entry points. 22 static bool already_initialized = false; 23 if (already_initialized) 24 return; 25 already_initialized = true; 26 27 CommandLine* parsed_command_line = CommandLine::ForCurrentProcess(); 28 29 if (parsed_command_line->HasSwitch(switches::kRendererProcessLimit)) { 30 std::string limit = parsed_command_line->GetSwitchValueASCII( 31 switches::kRendererProcessLimit); 32 int value; 33 if (base::StringToInt(limit, &value)) 34 max_render_process_count = value; 35 } 36 37 if (max_render_process_count <= 0) { 38 // Need to ensure the command line flag is consistent as a lot of chrome 39 // internal code checks this directly, but it wouldn't normally get set when 40 // we are implementing an embedded WebView. 41 parsed_command_line->AppendSwitch(switches::kSingleProcess); 42 } else { 43 max_render_process_count = 44 std::min(max_render_process_count, 45 static_cast<int>(content::kMaxRendererProcessCount)); 46 content::RenderProcessHost::SetMaxRendererProcessCount( 47 max_render_process_count); 48 } 49 50 parsed_command_line->AppendSwitch(switches::kForceCompositingMode); 51 parsed_command_line->AppendSwitch(switches::kAllowWebUICompositing); 52 parsed_command_line->AppendSwitch(switches::kEnableThreadedCompositing); 53 parsed_command_line->AppendSwitch( 54 switches::kEnableCompositingForFixedPosition); 55 parsed_command_line->AppendSwitch(switches::kEnableAcceleratedOverflowScroll); 56 parsed_command_line->AppendSwitch( 57 switches::kEnableAcceleratedScrollableFrames); 58 parsed_command_line->AppendSwitch( 59 switches::kEnableCompositedScrollingForFrames); 60 parsed_command_line->AppendSwitch(switches::kEnableBeginFrameScheduling); 61 62 parsed_command_line->AppendSwitch(switches::kEnableGestureTapHighlight); 63 parsed_command_line->AppendSwitch(switches::kEnablePinch); 64 parsed_command_line->AppendSwitch(switches::kEnableOverscrollNotifications); 65 66 // Run the GPU service as a thread in the browser instead of as a 67 // standalone process. 68 parsed_command_line->AppendSwitch(switches::kInProcessGPU); 69 parsed_command_line->AppendSwitch(switches::kDisableGpuShaderDiskCache); 70 71 // Always use fixed layout and viewport tag. 72 parsed_command_line->AppendSwitch(switches::kEnableFixedLayout); 73 parsed_command_line->AppendSwitch(switches::kEnableViewport); 74 75 // Disable anti-aliasing. 76 parsed_command_line->AppendSwitch( 77 cc::switches::kDisableCompositedAntialiasing); 78 79 if (!plugin_descriptor.empty()) { 80 parsed_command_line->AppendSwitchNative( 81 switches::kRegisterPepperPlugins, plugin_descriptor); 82 } 83 } 84 85 } // namespace content 86
