blimp/common/compositor/blimp_layer_tree_settings.cc

   1 // Copyright 2015 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 "blimp/common/compositor/blimp_layer_tree_settings.h"
   6
   7 #include "base/command_line.h"
   8 #include "base/logging.h"
   9 #include "base/macros.h"
  10 #include "base/strings/string_number_conversions.h"
  11 #include "base/strings/string_split.h"
  12 #include "base/sys_info.h"
  13 #include "cc/base/switches.h"
  14 #include "cc/trees/layer_tree_settings.h"
  15 #include "content/public/common/content_switches.h"
  16 #include "third_party/skia/include/core/SkColor.h"
  17 #include "ui/gfx/buffer_types.h"
  18 #include "ui/gl/gl_switches.h"
  19 #include "ui/native_theme/native_theme_switches.h"
  20
  21 namespace {
  22
  23 bool GetSwitchValueAsInt(const base::CommandLine& command_line,
  24                          const std::string& switch_string,
  25                          int min_value,
  26                          int max_value,
  27                          int* result) {
  28   std::string string_value = command_line.GetSwitchValueASCII(switch_string);
  29   int int_value;
  30   if (base::StringToInt(string_value, &int_value) && int_value >= min_value &&
  31       int_value <= max_value) {
  32     *result = int_value;
  33     return true;
  34   } else {
  35     return false;
  36   }
  37 }
  38
  39 void StringToUintVector(const std::string& str, std::vector<unsigned>* vector) {
  40   DCHECK(vector->empty());
  41   std::vector<std::string> pieces =
  42       base::SplitString(str, ",", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
  43   DCHECK_EQ(pieces.size(), static_cast<size_t>(gfx::BufferFormat::LAST) + 1);
  44   for (size_t i = 0; i < pieces.size(); ++i) {
  45     unsigned number = 0;
  46     bool succeed = base::StringToUint(pieces[i], &number);
  47     DCHECK(succeed);
  48     vector->push_back(number);
  49   }
  50 }
  51
  52 }  // namespace
  53
  54 namespace blimp {
  55
  56 // TODO(dtrainor): This is temporary to get the compositor up and running.
  57 // Much of this will either have to be pulled from the server or refactored to
  58 // share the settings from render_widget_compositor.cc.
  59 void PopulateCommonLayerTreeSettings(cc::LayerTreeSettings* settings) {
  60   const base::CommandLine& cmd = *base::CommandLine::ForCurrentProcess();
  61   // For web contents, layer transforms should scale up the contents of layers
  62   // to keep content always crisp when possible.
  63   settings->layer_transforms_should_scale_layer_contents = true;
  64
  65   if (cmd.HasSwitch(switches::kDisableGpuVsync)) {
  66     std::string display_vsync_string =
  67         cmd.GetSwitchValueASCII(switches::kDisableGpuVsync);
  68     if (display_vsync_string == "gpu") {
  69       settings->renderer_settings.disable_display_vsync = true;
  70     } else if (display_vsync_string == "beginframe") {
  71       settings->wait_for_beginframe_interval = false;
  72     } else {
  73       settings->renderer_settings.disable_display_vsync = true;
  74       settings->wait_for_beginframe_interval = false;
  75     }
  76   }
  77   settings->main_frame_before_activation_enabled =
  78       cmd.HasSwitch(cc::switches::kEnableMainFrameBeforeActivation) &&
  79       !cmd.HasSwitch(cc::switches::kDisableMainFrameBeforeActivation);
  80   settings->accelerated_animation_enabled =
  81       !cmd.HasSwitch(cc::switches::kDisableThreadedAnimation);
  82
  83   settings->default_tile_size = gfx::Size(256, 256);
  84   if (cmd.HasSwitch(switches::kDefaultTileWidth)) {
  85     int tile_width = 0;
  86     GetSwitchValueAsInt(cmd, switches::kDefaultTileWidth, 1,
  87                         std::numeric_limits<int>::max(), &tile_width);
  88     settings->default_tile_size.set_width(tile_width);
  89   }
  90   if (cmd.HasSwitch(switches::kDefaultTileHeight)) {
  91     int tile_height = 0;
  92     GetSwitchValueAsInt(cmd, switches::kDefaultTileHeight, 1,
  93                         std::numeric_limits<int>::max(), &tile_height);
  94     settings->default_tile_size.set_height(tile_height);
  95   }
  96
  97   int max_untiled_layer_width = settings->max_untiled_layer_size.width();
  98   if (cmd.HasSwitch(switches::kMaxUntiledLayerWidth)) {
  99     GetSwitchValueAsInt(cmd, switches::kMaxUntiledLayerWidth, 1,
 100                         std::numeric_limits<int>::max(),
 101                         &max_untiled_layer_width);
 102   }
 103   int max_untiled_layer_height = settings->max_untiled_layer_size.height();
 104   if (cmd.HasSwitch(switches::kMaxUntiledLayerHeight)) {
 105     GetSwitchValueAsInt(cmd, switches::kMaxUntiledLayerHeight, 1,
 106                         std::numeric_limits<int>::max(),
 107                         &max_untiled_layer_height);
 108   }
 109
 110   settings->max_untiled_layer_size =
 111       gfx::Size(max_untiled_layer_width, max_untiled_layer_height);
 112
 113   settings->gpu_rasterization_msaa_sample_count = 0;
 114   if (cmd.HasSwitch(switches::kGpuRasterizationMSAASampleCount)) {
 115     GetSwitchValueAsInt(cmd, switches::kGpuRasterizationMSAASampleCount, 0,
 116                         std::numeric_limits<int>::max(),
 117                         &settings->gpu_rasterization_msaa_sample_count);
 118   }
 119
 120   settings->gpu_rasterization_forced =
 121       cmd.HasSwitch(switches::kForceGpuRasterization);
 122   settings->gpu_rasterization_enabled =
 123       cmd.HasSwitch(switches::kEnableGpuRasterization);
 124
 125   settings->can_use_lcd_text = false;
 126   settings->use_distance_field_text =
 127       cmd.HasSwitch(switches::kEnableDistanceFieldText);
 128
 129   settings->use_zero_copy = cmd.HasSwitch(switches::kEnableZeroCopy);
 130   settings->enable_elastic_overscroll = false;
 131
 132   if (cmd.HasSwitch(switches::kContentImageTextureTarget)) {
 133     settings->use_image_texture_targets.clear();
 134     StringToUintVector(
 135         cmd.GetSwitchValueASCII(switches::kContentImageTextureTarget),
 136         &settings->use_image_texture_targets);
 137   }
 138
 139   settings->gather_images = false;
 140   if (cmd.HasSwitch(switches::kNumRasterThreads)) {
 141     int num_raster_threads = 0;
 142     GetSwitchValueAsInt(cmd, switches::kNumRasterThreads, 0,
 143                         std::numeric_limits<int>::max(), &num_raster_threads);
 144     settings->gather_images = num_raster_threads > 1;
 145   }
 146
 147   if (cmd.HasSwitch(cc::switches::kTopControlsShowThreshold)) {
 148     std::string top_threshold_str =
 149         cmd.GetSwitchValueASCII(cc::switches::kTopControlsShowThreshold);
 150     double show_threshold;
 151     if (base::StringToDouble(top_threshold_str, &show_threshold) &&
 152         show_threshold >= 0.f && show_threshold <= 1.f)
 153       settings->top_controls_show_threshold = show_threshold;
 154   }
 155
 156   if (cmd.HasSwitch(cc::switches::kTopControlsHideThreshold)) {
 157     std::string top_threshold_str =
 158         cmd.GetSwitchValueASCII(cc::switches::kTopControlsHideThreshold);
 159     double hide_threshold;
 160     if (base::StringToDouble(top_threshold_str, &hide_threshold) &&
 161         hide_threshold >= 0.f && hide_threshold <= 1.f)
 162       settings->top_controls_hide_threshold = hide_threshold;
 163   }
 164
 165   settings->verify_property_trees =
 166       cmd.HasSwitch(cc::switches::kEnablePropertyTreeVerification);
 167   settings->renderer_settings.allow_antialiasing &=
 168       !cmd.HasSwitch(cc::switches::kDisableCompositedAntialiasing);
 169   settings->single_thread_proxy_scheduler = false;
 170
 171   // These flags should be mirrored by UI versions in ui/compositor/.
 172   settings->initial_debug_state.show_debug_borders =
 173       cmd.HasSwitch(cc::switches::kShowCompositedLayerBorders);
 174   settings->initial_debug_state.show_fps_counter =
 175       cmd.HasSwitch(cc::switches::kShowFPSCounter);
 176   settings->initial_debug_state.show_layer_animation_bounds_rects =
 177       cmd.HasSwitch(cc::switches::kShowLayerAnimationBounds);
 178   settings->initial_debug_state.show_paint_rects =
 179       cmd.HasSwitch(switches::kShowPaintRects);
 180   settings->initial_debug_state.show_property_changed_rects =
 181       cmd.HasSwitch(cc::switches::kShowPropertyChangedRects);
 182   settings->initial_debug_state.show_surface_damage_rects =
 183       cmd.HasSwitch(cc::switches::kShowSurfaceDamageRects);
 184   settings->initial_debug_state.show_screen_space_rects =
 185       cmd.HasSwitch(cc::switches::kShowScreenSpaceRects);
 186   settings->initial_debug_state.show_replica_screen_space_rects =
 187       cmd.HasSwitch(cc::switches::kShowReplicaScreenSpaceRects);
 188
 189   settings->initial_debug_state.SetRecordRenderingStats(
 190       cmd.HasSwitch(cc::switches::kEnableGpuBenchmarking));
 191
 192   if (cmd.HasSwitch(cc::switches::kSlowDownRasterScaleFactor)) {
 193     const int kMinSlowDownScaleFactor = 0;
 194     const int kMaxSlowDownScaleFactor = INT_MAX;
 195     GetSwitchValueAsInt(
 196         cmd, cc::switches::kSlowDownRasterScaleFactor, kMinSlowDownScaleFactor,
 197         kMaxSlowDownScaleFactor,
 198         &settings->initial_debug_state.slow_down_raster_scale_factor);
 199   }
 200
 201   settings->strict_layer_property_change_checking =
 202       cmd.HasSwitch(cc::switches::kStrictLayerPropertyChangeChecking);
 203
 204 #if defined(OS_ANDROID)
 205   if (base::SysInfo::IsLowEndDevice())
 206     settings->gpu_rasterization_enabled = false;
 207   settings->using_synchronous_renderer_compositor = false;
 208   settings->record_full_layer = false;
 209   settings->scrollbar_animator = cc::LayerTreeSettings::LINEAR_FADE;
 210   settings->scrollbar_fade_delay_ms = 300;
 211   settings->scrollbar_fade_resize_delay_ms = 2000;
 212   settings->scrollbar_fade_duration_ms = 300;
 213   settings->solid_color_scrollbar_color = SkColorSetARGB(128, 128, 128, 128);
 214   settings->renderer_settings.highp_threshold_min = 2048;
 215   settings->ignore_root_layer_flings = false;
 216   bool use_low_memory_policy = base::SysInfo::IsLowEndDevice();
 217   settings->renderer_settings.use_rgba_4444_textures = use_low_memory_policy;
 218   if (use_low_memory_policy) {
 219     // On low-end we want to be very carefull about killing other
 220     // apps. So initially we use 50% more memory to avoid flickering
 221     // or raster-on-demand.
 222     settings->max_memory_for_prepaint_percentage = 67;
 223   } else {
 224     // On other devices we have increased memory excessively to avoid
 225     // raster-on-demand already, so now we reserve 50% _only_ to avoid
 226     // raster-on-demand, and use 50% of the memory otherwise.
 227     settings->max_memory_for_prepaint_percentage = 50;
 228   }
 229   settings->renderer_settings.should_clear_root_render_pass = true;
 230
 231   // TODO(danakj): Only do this on low end devices.
 232   settings->create_low_res_tiling = true;
 233
 234 // TODO(dtrainor): Investigate whether or not we want to use an external
 235 // source here.
 236 // settings->use_external_begin_frame_source = true;
 237
 238 #elif !defined(OS_MACOSX)
 239   if (ui::IsOverlayScrollbarEnabled()) {
 240     settings->scrollbar_animator = cc::LayerTreeSettings::THINNING;
 241     settings->solid_color_scrollbar_color = SkColorSetARGB(128, 128, 128, 128);
 242   } else {
 243     settings->scrollbar_animator = cc::LayerTreeSettings::LINEAR_FADE;
 244     settings->solid_color_scrollbar_color = SkColorSetARGB(128, 128, 128, 128);
 245   }
 246   settings->scrollbar_fade_delay_ms = 500;
 247   settings->scrollbar_fade_resize_delay_ms = 500;
 248   settings->scrollbar_fade_duration_ms = 300;
 249
 250   // When pinching in, only show the pinch-viewport overlay scrollbars if the
 251   // page scale is at least some threshold away from the minimum. i.e. don't
 252   // show the pinch scrollbars when at minimum scale.
 253   // TODO(dtrainor): Update this since https://crrev.com/1267603004 landed.
 254   // settings->scrollbar_show_scale_threshold = 1.05f;
 255 #endif
 256
 257   if (cmd.HasSwitch(switches::kEnableLowResTiling))
 258     settings->create_low_res_tiling = true;
 259   if (cmd.HasSwitch(switches::kDisableLowResTiling))
 260     settings->create_low_res_tiling = false;
 261   if (cmd.HasSwitch(cc::switches::kEnableBeginFrameScheduling))
 262     settings->use_external_begin_frame_source = true;
 263 }
 264
 265 }  // namespace blimp