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 #include "ui/gfx/buffer_types.h"
  14
  15 namespace cc {
  16
  17 LayerSettings::LayerSettings() : use_compositor_animation_timelines(false) {
  18 }
  19
  20 LayerSettings::~LayerSettings() {
  21 }
  22
  23 LayerTreeSettings::LayerTreeSettings()
  24     : single_thread_proxy_scheduler(true),
  25       use_external_begin_frame_source(false),
  26       main_frame_before_activation_enabled(false),
  27       using_synchronous_renderer_compositor(false),
  28       accelerated_animation_enabled(true),
  29       can_use_lcd_text(true),
  30       use_distance_field_text(false),
  31       gpu_rasterization_enabled(false),
  32       gpu_rasterization_forced(false),
  33       gpu_rasterization_msaa_sample_count(0),
  34       gpu_rasterization_skewport_target_time_in_seconds(0.2f),
  35       create_low_res_tiling(false),
  36       scrollbar_animator(NO_ANIMATOR),
  37       scrollbar_fade_delay_ms(0),
  38       scrollbar_fade_resize_delay_ms(0),
  39       scrollbar_fade_duration_ms(0),
  40       solid_color_scrollbar_color(SK_ColorWHITE),
  41       timeout_and_draw_when_animation_checkerboards(true),
  42       layer_transforms_should_scale_layer_contents(false),
  43       layers_always_allowed_lcd_text(false),
  44       minimum_contents_scale(0.0625f),
  45       low_res_contents_scale_factor(0.25f),
  46       top_controls_show_threshold(0.5f),
  47       top_controls_hide_threshold(0.5f),
  48       background_animation_rate(1.0),
  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_memory_for_prepaint_percentage(100),
  58       strict_layer_property_change_checking(false),
  59       use_zero_copy(false),
  60       use_persistent_map_for_gpu_memory_buffers(false),
  61       enable_elastic_overscroll(false),
  62       use_image_texture_targets(
  63           static_cast<size_t>(gfx::BufferFormat::LAST) + 1,
  64           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       max_staging_buffers(32) {}
  76
  77 LayerTreeSettings::~LayerTreeSettings() {}
  78
  79 SchedulerSettings LayerTreeSettings::ToSchedulerSettings() const {
  80   SchedulerSettings scheduler_settings;
  81   scheduler_settings.use_external_begin_frame_source =
  82       use_external_begin_frame_source;
  83   scheduler_settings.main_frame_before_activation_enabled =
  84       main_frame_before_activation_enabled;
  85   scheduler_settings.timeout_and_draw_when_animation_checkerboards =
  86       timeout_and_draw_when_animation_checkerboards;
  87   scheduler_settings.using_synchronous_renderer_compositor =
  88       using_synchronous_renderer_compositor;
  89   scheduler_settings.throttle_frame_production = wait_for_beginframe_interval;
  90   scheduler_settings.background_frame_interval =
  91       base::TimeDelta::FromSecondsD(1.0 / background_animation_rate);
  92   return scheduler_settings;
  93 }
  94
  95 }  // namespace cc