src/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       allow_antialiasing(true),
  18       throttle_frame_production(true),
  19       begin_impl_frame_scheduling_enabled(false),
  20       deadline_scheduling_enabled(true),
  21       using_synchronous_renderer_compositor(false),
  22       per_tile_painting_enabled(false),
  23       partial_swap_enabled(false),
  24       accelerated_animation_enabled(true),
  25       background_color_instead_of_checkerboard(false),
  26       show_overdraw_in_tracing(false),
  27       can_use_lcd_text(true),
  28       should_clear_root_render_pass(true),
  29       scrollbar_animator(NoAnimator),
  30       scrollbar_linear_fade_delay_ms(300),
  31       scrollbar_linear_fade_length_ms(300),
  32       solid_color_scrollbar_color(SK_ColorWHITE),
  33       calculate_top_controls_position(false),
  34       use_memory_management(true),
  35       timeout_and_draw_when_animation_checkerboards(true),
  36       maximum_number_of_failed_draws_before_draw_is_forced_(3),
  37       layer_transforms_should_scale_layer_contents(false),
  38       minimum_contents_scale(0.0625f),
  39       low_res_contents_scale_factor(0.25f),
  40       top_controls_height(0.f),
  41       top_controls_show_threshold(0.5f),
  42       top_controls_hide_threshold(0.5f),
  43       refresh_rate(60.0),
  44       max_partial_texture_updates(std::numeric_limits<size_t>::max()),
  45       num_raster_threads(1),
  46       default_tile_size(gfx::Size(256, 256)),
  47       max_untiled_layer_size(gfx::Size(512, 512)),
  48       minimum_occlusion_tracking_size(gfx::Size(160, 160)),
  49       use_pinch_zoom_scrollbars(false),
  50       use_pinch_virtual_viewport(false),
  51       // At 256x256 tiles, 128 tiles cover an area of 2048x4096 pixels.
  52       max_tiles_for_interest_area(128),
  53       max_unused_resource_memory_percentage(100),
  54       highp_threshold_min(0),
  55       force_direct_layer_drawing(false),
  56       strict_layer_property_change_checking(false),
  57       use_map_image(false),
  58       ignore_root_layer_flings(false),
  59       use_rgba_4444_textures(false),
  60       always_overscroll(false),
  61       touch_hit_testing(true),
  62       texture_id_allocation_chunk_size(64) {
  63 }
  64
  65 LayerTreeSettings::~LayerTreeSettings() {}
  66
  67 }  // namespace cc