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 LayerSettings::LayerSettings() : use_compositor_animation_timelines(false) {
  17 }
  18
  19 LayerSettings::~LayerSettings() {
  20 }
  21
  22 LayerTreeSettings::LayerTreeSettings()
  23     : single_thread_proxy_scheduler(true),
  24       use_external_begin_frame_source(false),
  25       main_frame_before_activation_enabled(false),
  26       using_synchronous_renderer_compositor(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(0.2f),
  34       create_low_res_tiling(false),
  35       scrollbar_animator(NO_ANIMATOR),
  36       scrollbar_fade_delay_ms(0),
  37       scrollbar_fade_resize_delay_ms(0),
  38       scrollbar_fade_duration_ms(0),
  39       solid_color_scrollbar_color(SK_ColorWHITE),
  40       timeout_and_draw_when_animation_checkerboards(true),
  41       layer_transforms_should_scale_layer_contents(false),
  42       layers_always_allowed_lcd_text(false),
  43       minimum_contents_scale(0.0625f),
  44       low_res_contents_scale_factor(0.25f),
  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       // 3000 pixels should give sufficient area for prepainting.
  54       tiling_interest_area_padding(3000),
  55       skewport_target_time_in_seconds(1.0f),
  56       skewport_extrapolation_limit_in_content_pixels(2000),
  57       max_unused_resource_memory_percentage(100),
  58       max_memory_for_prepaint_percentage(100),
  59       strict_layer_property_change_checking(false),
  60       use_one_copy(true),
  61       use_zero_copy(false),
  62       use_persistent_map_for_gpu_memory_buffers(false),
  63       enable_elastic_overscroll(false),
  64       use_image_texture_target(GL_TEXTURE_2D),
  65       ignore_root_layer_flings(false),
  66       scheduled_raster_task_limit(32),
  67       use_occlusion_for_tile_prioritization(false),
  68       record_full_layer(false),
  69       use_display_lists(false),
  70       verify_property_trees(false),
  71       gather_pixel_refs(false),
  72       use_compositor_animation_timelines(false),
  73       invert_viewport_scroll_order(false),
  74       wait_for_beginframe_interval(true) {}
  75
  76 LayerTreeSettings::~LayerTreeSettings() {}
  77
  78 SchedulerSettings LayerTreeSettings::ToSchedulerSettings() const {
  79   SchedulerSettings scheduler_settings;
  80   scheduler_settings.use_external_begin_frame_source =
  81       use_external_begin_frame_source;
  82   scheduler_settings.main_frame_before_activation_enabled =
  83       main_frame_before_activation_enabled;
  84   scheduler_settings.timeout_and_draw_when_animation_checkerboards =
  85       timeout_and_draw_when_animation_checkerboards;
  86   scheduler_settings.using_synchronous_renderer_compositor =
  87       using_synchronous_renderer_compositor;
  88   scheduler_settings.throttle_frame_production = wait_for_beginframe_interval;
  89   scheduler_settings.background_frame_interval =
  90       base::TimeDelta::FromSecondsD(1.0 / background_animation_rate);
  91   return scheduler_settings;
  92 }
  93
  94 }  // namespace cc