src/content/browser/android/content_startup_flags.cc

   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   parsed_command_line->AppendSwitch(switches::kEnableDeadlineScheduling);
  62
  63   parsed_command_line->AppendSwitch(switches::kEnableGestureTapHighlight);
  64   parsed_command_line->AppendSwitch(switches::kEnablePinch);
  65   parsed_command_line->AppendSwitch(switches::kEnableOverlayFullscreenVideo);
  66   parsed_command_line->AppendSwitch(switches::kEnableOverlayScrollbars);
  67   parsed_command_line->AppendSwitch(switches::kEnableOverscrollNotifications);
  68
  69   // Run the GPU service as a thread in the browser instead of as a
  70   // standalone process.
  71   parsed_command_line->AppendSwitch(switches::kInProcessGPU);
  72   parsed_command_line->AppendSwitch(switches::kDisableGpuShaderDiskCache);
  73
  74   parsed_command_line->AppendSwitch(switches::kEnableViewport);
  75
  76   // Disable anti-aliasing.
  77   parsed_command_line->AppendSwitch(
  78       cc::switches::kDisableCompositedAntialiasing);
  79
  80   if (!plugin_descriptor.empty()) {
  81     parsed_command_line->AppendSwitchNative(
  82       switches::kRegisterPepperPlugins, plugin_descriptor);
  83   }
  84 }
  85
  86 }  // namespace content