// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/40285824): Remove this and convert code to safer constructs.
#pragma allow_unsafe_buffers
#endif
#include "ui/display/manager/display_change_observer.h"
#include <algorithm>
#include <map>
#include <set>
#include <string>
#include <tuple>
#include <utility>
#include <vector>
#include "base/check.h"
#include "base/check_op.h"
#include "base/command_line.h"
#include "base/json/json_reader.h"
#include "base/not_fatal_until.h"
#include "base/notreached.h"
#include "base/values.h"
#include "build/chromeos_buildflags.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/base/user_activity/user_activity_detector.h"
#include "ui/display/display.h"
#include "ui/display/display_features.h"
#include "ui/display/display_layout.h"
#include "ui/display/display_switches.h"
#include "ui/display/manager/display_layout_store.h"
#include "ui/display/manager/display_manager.h"
#include "ui/display/manager/display_properties_parser.h"
#include "ui/display/manager/touch_device_manager.h"
#include "ui/display/manager/util/display_manager_util.h"
#include "ui/display/types/display_constants.h"
#include "ui/display/types/display_mode.h"
#include "ui/display/types/display_snapshot.h"
#include "ui/display/util/display_util.h"
#include "ui/display/util/edid_parser.h"
#include "ui/events/devices/device_data_manager.h"
#include "ui/events/devices/touchscreen_device.h"
#include "ui/strings/grit/ui_strings.h"
namespace display {
namespace {
// The DPI threshold to determine the device scale factor.
// DPI higher than |dpi| will use |device_scale_factor|.
struct DeviceScaleFactorDPIThreshold {
float dpi;
float device_scale_factor;
};
// Update the list of zoom levels whenever a new device scale factor is added
// here. See zoom level list in /ui/display/manager/util/display_manager_util.cc
const DeviceScaleFactorDPIThreshold kThresholdTableForInternal[] = {
{310.f, kDsf_2_666}, {270.0f, 2.4f}, {230.0f, 2.0f}, {220.0f, kDsf_1_777},
{180.0f, 1.6f}, {150.0f, 1.25f}, {0.0f, 1.0f},
};
// Returns a list of display modes for the given |output| that doesn't exclude
// any mode. The returned list is sorted by size, then by refresh rate, then by
// is_interlaced.
ManagedDisplayInfo::ManagedDisplayModeList GetModeListWithAllRefreshRates(
const DisplaySnapshot& output) {
ManagedDisplayInfo::ManagedDisplayModeList display_mode_list;
for (const auto& mode_info : output.modes()) {
display_mode_list.emplace_back(mode_info->size(), mode_info->refresh_rate(),
mode_info->is_interlaced(),
output.native_mode() == mode_info.get(),
1.0);
}
std::sort(
display_mode_list.begin(), display_mode_list.end(),
[](const ManagedDisplayMode& lhs, const ManagedDisplayMode& rhs) {
return std::forward_as_tuple(lhs.size().width(), lhs.size().height(),
lhs.refresh_rate(), lhs.is_interlaced()) <
std::forward_as_tuple(rhs.size().width(), rhs.size().height(),
rhs.refresh_rate(), rhs.is_interlaced());
});
return display_mode_list;
}
std::optional<gfx::RoundedCornersF> ParsePanelRadiiFromCommandLine() {
if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
switches::kDisplayProperties)) {
return std::nullopt;
}
std::optional<base::Value> display_switch_value = base::JSONReader::Read(
base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
switches::kDisplayProperties));
if (!display_switch_value.has_value()) {
return std::nullopt;
}
return ParseDisplayPanelRadii(&display_switch_value.value());
}
} // namespace
// static
ManagedDisplayInfo::ManagedDisplayModeList
DisplayChangeObserver::GetInternalManagedDisplayModeList(
const ManagedDisplayInfo& display_info,
const DisplaySnapshot& output) {
const DisplayMode* ui_native_mode = output.native_mode();
ManagedDisplayMode native_mode(ui_native_mode->size(),
ui_native_mode->refresh_rate(),
ui_native_mode->is_interlaced(), true,
display_info.device_scale_factor());
return CreateInternalManagedDisplayModeList(native_mode);
}
// static
ManagedDisplayInfo::ManagedDisplayModeList
DisplayChangeObserver::GetExternalManagedDisplayModeList(
const DisplaySnapshot& output) {
if (display::features::IsListAllDisplayModesEnabled())
return GetModeListWithAllRefreshRates(output);
struct SizeComparator {
constexpr bool operator()(const gfx::Size& lhs,
const gfx::Size& rhs) const {
return std::forward_as_tuple(lhs.width(), lhs.height()) <
std::forward_as_tuple(rhs.width(), rhs.height());
}
};
using DisplayModeMap =
std::map<gfx::Size, ManagedDisplayMode, SizeComparator>;
DisplayModeMap display_mode_map;
ManagedDisplayMode native_mode;
for (const auto& mode_info : output.modes()) {
const gfx::Size size = mode_info->size();
ManagedDisplayMode display_mode(
mode_info->size(), mode_info->refresh_rate(),
mode_info->is_interlaced(), output.native_mode() == mode_info.get(),
1.0);
if (display_mode.native())
native_mode = display_mode;
// Add the display mode if it isn't already present and override interlaced
// display modes with non-interlaced ones. We prioritize having non
// interlaced mode over refresh rate. A mode having lower refresh rate
// but is not interlaced will be picked over a mode having high refresh
// rate but is interlaced.
auto display_mode_it = display_mode_map.find(size);
if (display_mode_it == display_mode_map.end()) {
display_mode_map.emplace(size, display_mode);
} else if (display_mode_it->second.is_interlaced() &&
!display_mode.is_interlaced()) {
display_mode_it->second = std::move(display_mode);
} else if (!display_mode.is_interlaced() &&
display_mode_it->second.refresh_rate() <
display_mode.refresh_rate()) {
display_mode_it->second = std::move(display_mode);
}
}
if (output.native_mode()) {
const gfx::Size size = native_mode.size();
auto it = display_mode_map.find(size);
CHECK(it != display_mode_map.end(), base::NotFatalUntil::M130)
<< "Native mode must be part of the mode list.";
// If the native mode was replaced (e.g. by a mode with similar size but
// higher refresh rate), we overwrite that mode with the native mode. The
// native mode will always be chosen as the best mode for this size (see
// DisplayConfigurator::FindDisplayModeMatchingSize()).
if (!it->second.native())
it->second = native_mode;
}
ManagedDisplayInfo::ManagedDisplayModeList display_mode_list;
for (const auto& display_mode_pair : display_mode_map)
display_mode_list.push_back(std::move(display_mode_pair.second));
return display_mode_list;
}
DisplayChangeObserver::DisplayChangeObserver(DisplayManager* display_manager)
: internal_panel_radii_(ParsePanelRadiiFromCommandLine()),
display_manager_(display_manager) {
ui::DeviceDataManager::GetInstance()->AddObserver(this);
}
DisplayChangeObserver::~DisplayChangeObserver() {
ui::DeviceDataManager::GetInstance()->RemoveObserver(this);
}
MultipleDisplayState DisplayChangeObserver::GetStateForDisplayIds(
const DisplayConfigurator::DisplayStateList& display_states) {
UpdateInternalDisplay(display_states);
if (display_states.size() == 1)
return MULTIPLE_DISPLAY_STATE_SINGLE;
DisplayIdList list =
GenerateDisplayIdList(display_states, &DisplaySnapshot::display_id);
return display_manager_->ShouldSetMirrorModeOn(
list, /*should_check_hardware_mirroring=*/true)
? MULTIPLE_DISPLAY_STATE_MULTI_MIRROR
: MULTIPLE_DISPLAY_STATE_MULTI_EXTENDED;
}
bool DisplayChangeObserver::GetSelectedModeForDisplayId(
int64_t display_id,
ManagedDisplayMode* out_mode) const {
return display_manager_->GetSelectedModeForDisplayId(display_id, out_mode);
}
void DisplayChangeObserver::OnDisplayConfigurationChanged(
const DisplayConfigurator::DisplayStateList& display_states) {
UpdateInternalDisplay(display_states);
std::vector<ManagedDisplayInfo> displays;
for (const DisplaySnapshot* state : display_states) {
const DisplayMode* mode_info = state->current_mode();
if (!mode_info)
continue;
displays.emplace_back(CreateManagedDisplayInfoInternal(state, mode_info));
}
display_manager_->touch_device_manager()->AssociateTouchscreens(
&displays, ui::DeviceDataManager::GetInstance()->GetTouchscreenDevices());
display_manager_->OnNativeDisplaysChanged(displays);
// For the purposes of user activity detection, ignore synthetic mouse events
// that are triggered by screen resizes: http://crbug.com/360634
ui::UserActivityDetector::Get()->OnDisplayPowerChanging();
}
void DisplayChangeObserver::OnDisplayConfigurationChangeFailed(
const DisplayConfigurator::DisplayStateList& displays,
MultipleDisplayState failed_new_state) {
// If display configuration failed during startup, simply update the display
// manager with detected displays. If no display is detected, it will
// create a pseudo display.
if (display_manager_->GetNumDisplays() == 0)
OnDisplayConfigurationChanged(displays);
}
void DisplayChangeObserver::OnInputDeviceConfigurationChanged(
uint8_t input_device_types) {
if (input_device_types & ui::InputDeviceEventObserver::kTouchscreen) {
// If there are no cached display snapshots, either there are no attached
// displays or the cached snapshots have been invalidated. For the first
// case there aren't any touchscreens to associate. For the second case,
// the displays and touch input-devices will get associated when display
// configuration finishes.
const auto& cached_displays =
display_manager_->configurator()->cached_displays();
if (!cached_displays.empty())
OnDisplayConfigurationChanged(cached_displays);
}
}
// static
float DisplayChangeObserver::FindDeviceScaleFactor(
float dpi,
const gfx::Size& size_in_pixels) {
// Nocturne has special scale factor 3000/1332=2.252.. for the panel 3kx2k.
constexpr gfx::Size k225DisplaySizeHackNocturne(3000, 2000);
// Keep the Chell's scale factor 2.252 until we make decision.
constexpr gfx::Size k2DisplaySizeHackChell(3200, 1800);
constexpr gfx::Size k18DisplaySizeHackCoachZ(2160, 1440);
// Only change the OLED display scale factor for Xol device.
constexpr gfx::Size k12DisplaySizeHackXol(1920, 1080);
if (size_in_pixels == k225DisplaySizeHackNocturne) {
return kDsf_2_252;
}
if (size_in_pixels == k2DisplaySizeHackChell) {
return 2.f;
}
if (size_in_pixels == k18DisplaySizeHackCoachZ) {
return kDsf_1_8;
}
if (display::features::IsOledScaleFactorEnabled() &&
size_in_pixels == k12DisplaySizeHackXol) {
return 1.2f;
}
for (size_t i = 0; i < std::size(kThresholdTableForInternal); ++i) {
if (dpi >= kThresholdTableForInternal[i].dpi) {
return kThresholdTableForInternal[i].device_scale_factor;
}
}
return 1.0f;
}
// static
ManagedDisplayInfo DisplayChangeObserver::CreateManagedDisplayInfo(
const DisplaySnapshot* snapshot,
const DisplayMode* mode_info,
bool native,
float device_scale_factor,
float dpi,
const std::string& name,
const gfx::RoundedCornersF& panel_radii) {
const bool has_overscan = snapshot->has_overscan();
const int64_t id = snapshot->display_id();
ManagedDisplayInfo new_info = ManagedDisplayInfo(id, name, has_overscan);
new_info.set_port_display_id(snapshot->port_display_id());
new_info.set_edid_display_id(snapshot->edid_display_id());
new_info.set_connector_index(snapshot->connector_index());
if (snapshot->product_code() != DisplaySnapshot::kInvalidProductCode) {
uint16_t manufacturer_id = 0;
uint16_t product_id = 0;
EdidParser::SplitProductCodeInManufacturerIdAndProductId(
snapshot->product_code(), &manufacturer_id, &product_id);
new_info.set_manufacturer_id(
EdidParser::ManufacturerIdToString(manufacturer_id));
new_info.set_product_id(EdidParser::ProductIdToString(product_id));
}
new_info.set_year_of_manufacture(snapshot->year_of_manufacture());
new_info.set_panel_orientation(snapshot->panel_orientation());
new_info.set_sys_path(snapshot->sys_path());
new_info.set_from_native_platform(true);
new_info.set_native(native);
new_info.set_device_scale_factor(device_scale_factor);
const gfx::Rect display_bounds(snapshot->origin(), mode_info->size());
new_info.SetBounds(display_bounds);
new_info.set_is_aspect_preserving_scaling(
snapshot->is_aspect_preserving_scaling());
if (dpi)
new_info.set_device_dpi(dpi);
// TODO(crbug.com/40652358): Remove kEnableUseHDRTransferFunction usage when
// HDR is fully supported on ChromeOS.
const bool allow_high_bit_depth =
base::FeatureList::IsEnabled(features::kUseHDRTransferFunction);
new_info.set_display_color_spaces(
CreateDisplayColorSpaces(snapshot->color_space(), allow_high_bit_depth,
snapshot->hdr_static_metadata()));
new_info.SetSnapshotColorSpace(snapshot->color_space());
constexpr int32_t kNormalBitDepth = 8;
new_info.set_bits_per_channel(
allow_high_bit_depth ? snapshot->bits_per_channel() : kNormalBitDepth);
new_info.set_refresh_rate(mode_info->refresh_rate());
new_info.set_is_interlaced(mode_info->is_interlaced());
new_info.set_vsync_rate_min(mode_info->vsync_rate_min());
new_info.set_variable_refresh_rate_state(
snapshot->variable_refresh_rate_state());
new_info.set_connection_type(snapshot->type());
new_info.set_physical_size(snapshot->physical_size());
ManagedDisplayInfo::ManagedDisplayModeList display_modes =
(snapshot->type() == DISPLAY_CONNECTION_TYPE_INTERNAL)
? GetInternalManagedDisplayModeList(new_info, *snapshot)
: GetExternalManagedDisplayModeList(*snapshot);
new_info.SetManagedDisplayModes(display_modes);
new_info.set_maximum_cursor_size(snapshot->maximum_cursor_size());
new_info.set_panel_corners_radii(panel_radii);
new_info.SetDRMFormatsAndModifiers(snapshot->GetDRMFormatsAndModifiers());
return new_info;
}
void DisplayChangeObserver::UpdateInternalDisplay(
const DisplayConfigurator::DisplayStateList& display_states) {
bool force_first_display_internal = ForceFirstDisplayInternal();
for (display::DisplaySnapshot* state : display_states) {
if (state->type() == DISPLAY_CONNECTION_TYPE_INTERNAL ||
(force_first_display_internal &&
(!HasInternalDisplay() || IsInternalDisplayId(state->display_id())))) {
if (HasInternalDisplay()) {
DCHECK_EQ(Display::InternalDisplayId(), state->display_id());
}
SetInternalDisplayIds({state->display_id()});
if (state->native_mode() &&
(!display_manager_->IsDisplayIdValid(state->display_id()) ||
!state->current_mode())) {
// Register the internal display info if
// 1) If it's not already registered. It'll be treated as
// new display in |UpdateDisplaysWith()|.
// 2) If it's not connected, because the display info will not
// be updated in |UpdateDisplaysWith()|, which will skips the
// disconnected displays.
ManagedDisplayInfo new_info =
CreateManagedDisplayInfoInternal(state, state->native_mode());
display_manager_->UpdateInternalDisplay(new_info);
}
return;
}
}
}
ManagedDisplayInfo DisplayChangeObserver::CreateManagedDisplayInfoInternal(
const DisplaySnapshot* snapshot,
const DisplayMode* mode_info) {
bool native = false;
float device_scale_factor = 1.0f;
// Sets dpi only if the screen size is valid.
const float dpi = IsDisplaySizeValid(snapshot->physical_size())
? kInchInMm * mode_info->size().width() /
snapshot->physical_size().width()
: 0;
if (snapshot->type() == DISPLAY_CONNECTION_TYPE_INTERNAL) {
native = true;
device_scale_factor = FindDeviceScaleFactor(dpi, mode_info->size());
} else {
// DisplaySnapshot stores the native_mode info. For external display, use it
// to determine if current mode_info is native or not.
const DisplayMode* native_mode = snapshot->native_mode();
native = *mode_info == *native_mode;
// External display scale factor is always 1.
CHECK(snapshot->type() != DISPLAY_CONNECTION_TYPE_INTERNAL);
device_scale_factor = 1.0f;
}
std::string name = (snapshot->type() == DISPLAY_CONNECTION_TYPE_INTERNAL)
? l10n_util::GetStringUTF8(IDS_DISPLAY_NAME_INTERNAL)
: snapshot->display_name();
if (name.empty()) {
name = l10n_util::GetStringUTF8(IDS_DISPLAY_NAME_UNKNOWN);
}
gfx::RoundedCornersF panel_radii;
if (display::features::IsRoundedDisplayEnabled() &&
snapshot->type() == display::DISPLAY_CONNECTION_TYPE_INTERNAL) {
panel_radii = internal_panel_radii_.value_or(gfx::RoundedCornersF());
}
return CreateManagedDisplayInfo(snapshot, mode_info, native,
device_scale_factor, dpi, name, panel_radii);
}
} // namespace display
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