cc/trees/layer_tree_settings.cc

   1 // Copyright 2011 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 "cc/trees/layer_tree_settings.h"
   6
   7 #include <limits>
   8
   9 #include "base/command_line.h"
  10 #include "base/logging.h"
  11 #include "base/strings/string_number_conversions.h"
  12
  13 namespace cc {
  14
  15 LayerTreeSettings::LayerTreeSettings()
  16     : impl_side_painting(false),
  17       throttle_frame_production(true),
  18       single_thread_proxy_scheduler(true),
  19       use_external_begin_frame_source(false),
  20       forward_begin_frames_to_children(false),
  21       main_frame_before_activation_enabled(false),
  22       using_synchronous_renderer_compositor(false),
  23       disable_hi_res_timer_tasks_on_battery(false),
  24       report_overscroll_only_for_scrollable_axes(false),
  25       per_tile_painting_enabled(false),
  26       accelerated_animation_enabled(true),
  27       can_use_lcd_text(true),
  28       use_distance_field_text(false),
  29       gpu_rasterization_enabled(false),
  30       gpu_rasterization_forced(false),
  31       create_low_res_tiling(false),
  32       scrollbar_animator(NoAnimator),
  33       scrollbar_fade_delay_ms(0),
  34       scrollbar_fade_resize_delay_ms(0),
  35       scrollbar_fade_duration_ms(0),
  36       solid_color_scrollbar_color(SK_ColorWHITE),
  37       calculate_top_controls_position(false),
  38       timeout_and_draw_when_animation_checkerboards(true),
  39       maximum_number_of_failed_draws_before_draw_is_forced_(3),
  40       layer_transforms_should_scale_layer_contents(false),
  41       layers_always_allowed_lcd_text(false),
  42       minimum_contents_scale(0.0625f),
  43       low_res_contents_scale_factor(0.25f),
  44       top_controls_height(0.f),
  45       top_controls_show_threshold(0.5f),
  46       top_controls_hide_threshold(0.5f),
  47       background_animation_rate(1.0),
  48       max_partial_texture_updates(std::numeric_limits<size_t>::max()),
  49       default_tile_size(gfx::Size(256, 256)),
  50       max_untiled_layer_size(gfx::Size(512, 512)),
  51       default_tile_grid_size(gfx::Size(256, 256)),
  52       minimum_occlusion_tracking_size(gfx::Size(160, 160)),
  53       use_pinch_zoom_scrollbars(false),
  54       use_pinch_virtual_viewport(false),
  55       // At 256x256 tiles, 128 tiles cover an area of 2048x4096 pixels.
  56       max_tiles_for_interest_area(128),
  57       skewport_target_time_multiplier(1.0f),
  58       skewport_extrapolation_limit_in_content_pixels(2000),
  59       max_unused_resource_memory_percentage(100),
  60       max_memory_for_prepaint_percentage(100),
  61       strict_layer_property_change_checking(false),
  62       use_one_copy(false),
  63       use_zero_copy(false),
  64       ignore_root_layer_flings(false),
  65       scheduled_raster_task_limit(32),
  66       use_occlusion_for_tile_prioritization(false),
  67       record_full_layer(false) {
  68 }
  69
  70 LayerTreeSettings::~LayerTreeSettings() {}
  71
  72 }  // namespace cc