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.
5 #include "cc/trees/layer_tree_settings.h"
9 #include "base/command_line.h"
10 #include "base/logging.h"
11 #include "base/strings/string_number_conversions.h"
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),
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),
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) {
65 LayerTreeSettings::~LayerTreeSettings() {}