text: // Copyright 2011 The Chromium Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  #include "cc/trees/layer_tree_settings.h"
  
  #include <GLES2/gl2.h>
  #include <limits>
  
  #include "base/command_line.h"
  #include "base/logging.h"
  #include "base/strings/string_number_conversions.h"
  
  namespace cc {
  
  LayerTreeSettings::LayerTreeSettings()
      : impl_side_painting(false),
        throttle_frame_production(true),
        single_thread_proxy_scheduler(true),
        use_external_begin_frame_source(false),
        forward_begin_frames_to_children(false),
        main_frame_before_activation_enabled(false),
        using_synchronous_renderer_compositor(false),
        disable_hi_res_timer_tasks_on_battery(false),
        report_overscroll_only_for_scrollable_axes(false),
        per_tile_painting_enabled(false),
        accelerated_animation_enabled(true),
        can_use_lcd_text(true),
        use_distance_field_text(false),
        gpu_rasterization_enabled(false),
        gpu_rasterization_forced(false),
        create_low_res_tiling(false),
        scrollbar_animator(NoAnimator),
        scrollbar_fade_delay_ms(0),
        scrollbar_fade_resize_delay_ms(0),
        scrollbar_fade_duration_ms(0),
        solid_color_scrollbar_color(SK_ColorWHITE),
        calculate_top_controls_position(false),
        timeout_and_draw_when_animation_checkerboards(true),
        maximum_number_of_failed_draws_before_draw_is_forced_(3),
        layer_transforms_should_scale_layer_contents(false),
        layers_always_allowed_lcd_text(false),
        minimum_contents_scale(0.0625f),
        low_res_contents_scale_factor(0.25f),
        top_controls_show_threshold(0.5f),
        top_controls_hide_threshold(0.5f),
        background_animation_rate(1.0),
        max_partial_texture_updates(std::numeric_limits<size_t>::max()),
        default_tile_size(gfx::Size(256, 256)),
        max_untiled_layer_size(gfx::Size(512, 512)),
        default_tile_grid_size(gfx::Size(256, 256)),
        minimum_occlusion_tracking_size(gfx::Size(160, 160)),
        use_pinch_zoom_scrollbars(false),
        use_pinch_virtual_viewport(false),
        // At 256x256 tiles, 128 tiles cover an area of 2048x4096 pixels.
        max_tiles_for_interest_area(128),
        skewport_target_time_in_seconds(1.0f),
        skewport_extrapolation_limit_in_content_pixels(2000),
        max_unused_resource_memory_percentage(100),
        max_memory_for_prepaint_percentage(100),
        strict_layer_property_change_checking(false),
        use_one_copy(false),
        use_zero_copy(false),
        enable_elastic_overscroll(false),
        use_image_texture_target(GL_TEXTURE_2D),
        ignore_root_layer_flings(false),
        scheduled_raster_task_limit(32),
        use_occlusion_for_tile_prioritization(false),
        record_full_layer(false),
        use_display_lists(false),
        verify_property_trees(false) {
  }
  
  LayerTreeSettings::~LayerTreeSettings() {}
  
  }  // namespace cc
  