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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/display/types/display_snapshot.h"
#include <inttypes.h>
#include <sstream>
#include "base/logging.h"
#include "base/strings/stringprintf.h"
namespace display {
namespace {
// The display serial number beginning byte position and its length in the
// EDID number as defined in the spec.
// https://en.wikipedia.org/wiki/Extended_Display_Identification_Data
constexpr size_t kSerialNumberBeginningByte = 12U;
constexpr size_t kSerialNumberLengthInBytes = 4U;
std::string ModeListString(
const std::vector<std::unique_ptr<const DisplayMode>>& modes) {
std::stringstream stream;
bool first = true;
for (auto& mode : modes) {
if (!first)
stream << ", ";
stream << mode->ToString();
first = false;
}
return stream.str();
}
} // namespace
DisplaySnapshot::DisplaySnapshot(
int64_t display_id,
int64_t port_display_id,
int64_t edid_display_id,
uint16_t connector_index,
const gfx::Point& origin,
const gfx::Size& physical_size,
DisplayConnectionType type,
uint64_t base_connector_id,
const std::vector<uint64_t>& path_topology,
bool is_aspect_preserving_scaling,
bool has_overscan,
PrivacyScreenState privacy_screen_state,
bool has_content_protection_key,
const ColorInfo& color_info,
std::string display_name,
const base::FilePath& sys_path,
DisplayModeList modes,
PanelOrientation panel_orientation,
const std::vector<uint8_t>& edid,
const DisplayMode* current_mode,
const DisplayMode* native_mode,
int64_t product_code,
int32_t year_of_manufacture,
const gfx::Size& maximum_cursor_size,
VariableRefreshRateState variable_refresh_rate_state,
const DrmFormatsAndModifiers& drm_formats_and_modifiers)
: display_id_(display_id),
port_display_id_(port_display_id),
edid_display_id_(edid_display_id),
connector_index_(connector_index),
origin_(origin),
physical_size_(physical_size),
type_(type),
base_connector_id_(base_connector_id),
path_topology_(path_topology),
is_aspect_preserving_scaling_(is_aspect_preserving_scaling),
has_overscan_(has_overscan),
privacy_screen_state_(privacy_screen_state),
has_content_protection_key_(has_content_protection_key),
color_info_(color_info),
display_name_(display_name),
sys_path_(sys_path),
modes_(std::move(modes)),
panel_orientation_(panel_orientation),
edid_(edid),
current_mode_(current_mode),
native_mode_(native_mode),
product_code_(product_code),
year_of_manufacture_(year_of_manufacture),
maximum_cursor_size_(maximum_cursor_size),
variable_refresh_rate_state_(variable_refresh_rate_state),
drm_formats_and_modifiers_(drm_formats_and_modifiers) {
// We must explicitly clear out the bytes that represent the serial number.
const size_t end = std::min(
kSerialNumberBeginningByte + kSerialNumberLengthInBytes, edid_.size());
for (size_t i = kSerialNumberBeginningByte; i < end; ++i) {
edid_[i] = 0;
}
}
DisplaySnapshot::~DisplaySnapshot() = default;
std::unique_ptr<DisplaySnapshot> DisplaySnapshot::Clone() const {
DisplayModeList clone_modes;
const DisplayMode* cloned_current_mode = nullptr;
const DisplayMode* cloned_native_mode = nullptr;
// Clone the display modes and find equivalent pointers to the native and
// current mode.
for (auto& mode : modes_) {
clone_modes.push_back(mode->Clone());
if (mode.get() == current_mode_)
cloned_current_mode = clone_modes.back().get();
if (mode.get() == native_mode_)
cloned_native_mode = clone_modes.back().get();
}
auto clone = std::make_unique<DisplaySnapshot>(
display_id_, port_display_id_, edid_display_id_, connector_index_,
origin_, physical_size_, type_, base_connector_id_, path_topology_,
is_aspect_preserving_scaling_, has_overscan_, privacy_screen_state_,
has_content_protection_key_, color_info_, display_name_, sys_path_,
std::move(clone_modes), panel_orientation_, edid_, cloned_current_mode,
cloned_native_mode, product_code_, year_of_manufacture_,
maximum_cursor_size_, variable_refresh_rate_state_,
drm_formats_and_modifiers_);
// Set current mode in case it is non-native (because non-native modes are not
// cloned).
clone->set_current_mode(current_mode_);
return clone;
}
std::string DisplaySnapshot::ToString() const {
std::string sharing_connector;
if (base_connector_id_) {
sharing_connector = path_topology_.empty() ? "NO" : "YES";
} else {
sharing_connector = "parsing_error";
}
return base::StringPrintf(
"id=%" PRId64
" current_mode=%s native_mode=%s origin=%s"
" panel_orientation=%d"
" physical_size=%s, type=%s sharing_base_connector=%s name=\"%s\" "
"(year:%d) modes=(%s)",
display_id(),
current_mode_ ? current_mode_->ToString().c_str() : "nullptr",
native_mode_ ? native_mode_->ToString().c_str() : "nullptr",
origin_.ToString().c_str(), panel_orientation_,
physical_size_.ToString().c_str(),
DisplayConnectionTypeString(type_).c_str(), sharing_connector.c_str(),
display_name_.c_str(), year_of_manufacture_,
ModeListString(modes_).c_str());
}
// static
gfx::BufferFormat DisplaySnapshot::PrimaryFormat() {
return gfx::BufferFormat::BGRA_8888;
}
void DisplaySnapshot::AddIndexToDisplayId() {
// The EDID-based display ID occupies the first 32 bits of |edid_display_id_|.
edid_display_id_ |= static_cast<int64_t>(connector_index_) << 32;
}
bool DisplaySnapshot::IsVrrCapable() const {
return variable_refresh_rate_state_ !=
VariableRefreshRateState::kVrrNotCapable;
}
bool DisplaySnapshot::IsVrrEnabled() const {
return variable_refresh_rate_state_ == VariableRefreshRateState::kVrrEnabled;
}
void DisplaySnapshot::set_current_mode(const DisplayMode* mode) {
if (current_mode_ == mode ||
(current_mode_ && mode && *current_mode_ == *mode)) {
return;
}
if (!mode) {
current_mode_ = nullptr;
return;
}
for (const auto& owned_mode : modes_) {
if (*owned_mode == *mode) {
current_mode_ = owned_mode.get();
return;
}
}
for (const auto& owned_mode : nonnative_modes_) {
if (*owned_mode == *mode) {
current_mode_ = owned_mode.get();
return;
}
}
// Unowned modes can occur due to panel fitting or virtual modes.
VLOG(3) << "Encountered mode which does not natively belong to display: "
<< mode->ToString();
// The clone will persist as an owned non-native mode until the snapshot is
// destructed. Do not attempt to delete it earlier in case it has been
// accessed elsewhere.
nonnative_modes_.push_back(mode->Clone());
current_mode_ = nonnative_modes_.back().get();
}
} // namespace display
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