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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <stdint.h>
#include <memory>
#include <string>
#include <vector>
#include "base/files/file_path.h"
#include "base/macros.h"
#include "ui/display/types/display_constants.h"
#include "ui/display/types/display_mode.h"
#include "ui/gfx/buffer_types.h"
#include "ui/gfx/color_space.h"
#include "ui/gfx/geometry/point.h"
#include "ui/gfx/geometry/size.h"
namespace display {
// This class represents the state of a display at one point in time. Platforms
// may extend this class in order to add platform specific configuration and
// identifiers required to configure this display.
class DISPLAY_TYPES_EXPORT DisplaySnapshot {
using DisplayModeList = std::vector<std::unique_ptr<const DisplayMode>>;
DisplaySnapshot(int64_t display_id,
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_color_correction_matrix,
bool color_correction_in_linear_space,
const gfx::ColorSpace& color_space,
uint32_t bits_per_channel,
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);
virtual ~DisplaySnapshot();
int64_t display_id() const { return display_id_; }
const gfx::Point& origin() const { return origin_; }
void set_origin(const gfx::Point& origin) { origin_ = origin; }
const gfx::Size& physical_size() const { return physical_size_; }
DisplayConnectionType type() const { return type_; }
uint64_t base_connector_id() const { return base_connector_id_; }
const std::vector<uint64_t>& path_topology() const { return path_topology_; }
bool is_aspect_preserving_scaling() const {
return is_aspect_preserving_scaling_;
bool has_overscan() const { return has_overscan_; }
PrivacyScreenState privacy_screen_state() const {
return privacy_screen_state_;
bool has_color_correction_matrix() const {
return has_color_correction_matrix_;
bool color_correction_in_linear_space() const {
return color_correction_in_linear_space_;
const gfx::ColorSpace& color_space() const { return color_space_; }
uint32_t bits_per_channel() const { return bits_per_channel_; }
const std::string& display_name() const { return display_name_; }
const base::FilePath& sys_path() const { return sys_path_; }
const DisplayModeList& modes() const { return modes_; }
PanelOrientation panel_orientation() const { return panel_orientation_; }
const std::vector<uint8_t>& edid() const { return edid_; }
const DisplayMode* current_mode() const { return current_mode_; }
void set_current_mode(const DisplayMode* mode) { current_mode_ = mode; }
const DisplayMode* native_mode() const { return native_mode_; }
int64_t product_code() const { return product_code_; }
int32_t year_of_manufacture() const { return year_of_manufacture_; }
const gfx::Size& maximum_cursor_size() const { return maximum_cursor_size_; }
void add_mode(const DisplayMode* mode) { modes_.push_back(mode->Clone()); }
// Clones display state.
std::unique_ptr<DisplaySnapshot> Clone();
// Returns a textual representation of this display state.
std::string ToString() const;
// Used when no |product_code_| known.
static const int64_t kInvalidProductCode = -1;
// Returns the buffer format to be used for the primary plane buffer.
static gfx::BufferFormat PrimaryFormat();
// Display id for this output.
const int64_t display_id_;
// Display's origin on the framebuffer.
gfx::Point origin_;
const gfx::Size physical_size_;
const DisplayConnectionType type_;
// The next two private members represent the connection path between the
// source device and this display. Consider the following three-display setup:
// +-------------+
// | Source | +-------------+
// | (Device) | | BranchX |
// | | | (MST) |
// | [conn6]--->| [port1]--->DisplayA
// +-------------+ | |
// | | +-------------+
// | | | BranchY |
// | | | (MST) |
// | [port2]--->| [port1]----->DisplayB
// +-------------+ | |
// | [port2]----->DisplayC
// +-------------+
// [conn6]: is the root of the topology tree (a.k.a. the base connector),
// which maps to a physical connector on the device. This value can be used to
// determine if two or more external displays are sharing the same physical
// port.
// Important: Do not confuse this value with a display's connector ID!
// The base connector will be listed as disconnected when a branch device is
// attached to it to signal that it is not available for use, while new
// connector IDs are spawned for connected monitors down the path. A display's
// connector ID will be equal to the base connector ID only when the display
// is connected directly to the source device.
// [BranchX|port1]: is an output port to which DisplayA is connected.
// [BranchX|port2]: is an output port to which BranchY is connected.
// The ports on BranchY follow the same logic. Notice that port numbers across
// branch devices are NOT unique.
// Example 1: if |this| represents DisplayB:
// |base_connector_id_| == 6
// |path_topology_| == {2, 1}
// |base_connector_id_| != |this| connector id.
// Example 2: if |this| represents a display that is connected directly to the
// source device above:
// |base_connector_id_| == 6
// |path_topology_| == {}
// |base_connector_id_| == |this| connector id.
// The path is in a failed/error state if |base_connector_id_| == 0. This
// indicates that the display is connected to one or more branch devices, but
// the path could not be parsed.
const uint64_t base_connector_id_;
const std::vector<uint64_t> path_topology_;
const bool is_aspect_preserving_scaling_;
const bool has_overscan_;
const PrivacyScreenState privacy_screen_state_;
// Whether this display has advanced color correction available.
const bool has_color_correction_matrix_;
// Whether the color correction matrix will be applied in linear color space
// instead of gamma compressed one.
const bool color_correction_in_linear_space_;
const gfx::ColorSpace color_space_;
uint32_t bits_per_channel_;
const std::string display_name_;
const base::FilePath sys_path_;
DisplayModeList modes_;
// The orientation of the panel in respect to the natural device orientation.
PanelOrientation panel_orientation_;
// The display's EDID. It can be empty if nothing extracted such as in the
// case of a virtual display.
std::vector<uint8_t> edid_;
// Mode currently being used by the output.
const DisplayMode* current_mode_;
// "Best" mode supported by the output.
const DisplayMode* const native_mode_;
// Combination of manufacturer id and product id.
const int64_t product_code_;
const int32_t year_of_manufacture_;
// Maximum supported cursor size on this display.
const gfx::Size maximum_cursor_size_;
} // namespace display