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 <GLES2/gl2.h>
   8 #include <limits>
   9
  10 #include "base/command_line.h"
  11 #include "base/logging.h"
  12 #include "base/strings/string_number_conversions.h"
  13
  14 namespace cc {
  15
  16 LayerTreeSettings::LayerTreeSettings()
  17     : impl_side_painting(false),
  18       throttle_frame_production(true),
  19       single_thread_proxy_scheduler(true),
  20       use_external_begin_frame_source(false),
  21       forward_begin_frames_to_children(false),
  22       main_frame_before_activation_enabled(false),
  23       using_synchronous_renderer_compositor(false),
  24       disable_hi_res_timer_tasks_on_battery(false),
  25       report_overscroll_only_for_scrollable_axes(false),
  26       per_tile_painting_enabled(false),
  27       accelerated_animation_enabled(true),
  28       can_use_lcd_text(true),
  29       use_distance_field_text(false),
  30       gpu_rasterization_enabled(false),
  31       gpu_rasterization_forced(false),
  32       gpu_rasterization_msaa_sample_count(0),
  33       gpu_rasterization_skewport_target_time_in_seconds(0.0f),
  34       threaded_gpu_rasterization_enabled(false),
  35       create_low_res_tiling(false),
  36       scrollbar_animator(NoAnimator),
  37       scrollbar_fade_delay_ms(0),
  38       scrollbar_fade_resize_delay_ms(0),
  39       scrollbar_fade_duration_ms(0),
  40       scrollbar_show_scale_threshold(1.0f),
  41       solid_color_scrollbar_color(SK_ColorWHITE),
  42       calculate_top_controls_position(false),
  43       timeout_and_draw_when_animation_checkerboards(true),
  44       maximum_number_of_failed_draws_before_draw_is_forced_(3),
  45       layer_transforms_should_scale_layer_contents(false),
  46       layers_always_allowed_lcd_text(false),
  47       minimum_contents_scale(0.0625f),
  48       low_res_contents_scale_factor(0.25f),
  49       top_controls_show_threshold(0.5f),
  50       top_controls_hide_threshold(0.5f),
  51       background_animation_rate(1.0),
  52       max_partial_texture_updates(std::numeric_limits<size_t>::max()),
  53       default_tile_size(gfx::Size(256, 256)),
  54       max_untiled_layer_size(gfx::Size(512, 512)),
  55       default_tile_grid_size(gfx::Size(256, 256)),
  56       minimum_occlusion_tracking_size(gfx::Size(160, 160)),
  57       use_pinch_zoom_scrollbars(false),
  58       use_pinch_virtual_viewport(false),
  59       // At 256x256 tiles, 128 tiles cover an area of 2048x4096 pixels.
  60       max_tiles_for_interest_area(128),
  61       skewport_target_time_in_seconds(1.0f),
  62       skewport_extrapolation_limit_in_content_pixels(2000),
  63       max_unused_resource_memory_percentage(100),
  64       max_memory_for_prepaint_percentage(100),
  65       strict_layer_property_change_checking(false),
  66       use_one_copy(false),
  67       use_zero_copy(false),
  68       enable_elastic_overscroll(false),
  69       use_image_texture_target(GL_TEXTURE_2D),
  70       ignore_root_layer_flings(false),
  71       scheduled_raster_task_limit(32),
  72       use_occlusion_for_tile_prioritization(false),
  73       record_full_layer(false),
  74       use_display_lists(false),
  75       verify_property_trees(false) {
  76 }
  77
  78 LayerTreeSettings::~LayerTreeSettings() {}
  79
  80 }  // namespace cc