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// Copyright (c) 2013 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 <algorithm>
#include <map>
#include <string>
#include <vector>
#include "base/files/file_path.h"
#include "ui/display/display.h"
#include "ui/display/manager/display_manager_export.h"
#include "ui/display/types/display_constants.h"
#include "ui/gfx/geometry/insets.h"
#include "ui/gfx/geometry/rect.h"
namespace display {
// A class that represents the display's mode info.
class DISPLAY_MANAGER_EXPORT ManagedDisplayMode {
explicit ManagedDisplayMode(const gfx::Size& size);
ManagedDisplayMode(const gfx::Size& size,
float refresh_rate,
bool is_interlaced,
bool native);
ManagedDisplayMode(const gfx::Size& size,
float refresh_rate,
bool is_interlaced,
bool native,
float device_scale_factor);
ManagedDisplayMode(const ManagedDisplayMode& other);
ManagedDisplayMode& operator=(const ManagedDisplayMode& other);
// Returns the size in DIP which is visible to the user.
gfx::Size GetSizeInDIP(bool is_internal) const;
// Returns true if |other| has same size and scale factors.
bool IsEquivalent(const ManagedDisplayMode& other) const;
const gfx::Size& size() const { return size_; }
bool is_interlaced() const { return is_interlaced_; }
float refresh_rate() const { return refresh_rate_; }
bool native() const { return native_; }
// Missing from ui::ManagedDisplayMode
float device_scale_factor() const { return device_scale_factor_; }
std::string ToString() const;
gfx::Size size_; // Physical pixel size of the display.
float refresh_rate_ = 0.0f; // Refresh rate of the display, in Hz.
bool is_interlaced_ = false; // True if mode is interlaced.
bool native_ = false; // True if mode is native mode of the display.
float device_scale_factor_ = 1.0f; // The device scale factor of the mode.
inline bool operator==(const ManagedDisplayMode& lhs,
const ManagedDisplayMode& rhs) {
return lhs.size() == rhs.size() &&
lhs.is_interlaced() == rhs.is_interlaced() &&
lhs.refresh_rate() == rhs.refresh_rate() &&
lhs.native() == rhs.native() &&
lhs.device_scale_factor() == rhs.device_scale_factor();
inline bool operator!=(const ManagedDisplayMode& lhs,
const ManagedDisplayMode& rhs) {
return !(lhs == rhs);
// ManagedDisplayInfo contains metadata for each display. This is used to create
// |Display| as well as to maintain extra infomation to manage displays in ash
// environment. This class is intentionally made copiable.
class DISPLAY_MANAGER_EXPORT ManagedDisplayInfo {
using ManagedDisplayModeList = std::vector<ManagedDisplayMode>;
// Creates a ManagedDisplayInfo from string spec. 100+200-1440x800 creates
// display
// whose size is 1440x800 at the location (100, 200) in host coordinates.
// The format is
// [origin-]widthxheight[*device_scale_factor][#resolutions list]
// [/<properties>][@zoom-factor]
// where [] are optional:
// - |origin| is given in x+y- format.
// - |device_scale_factor| is either 2 or 1 (or empty).
// - properties can combination of 'o', which adds default overscan insets
// (5%), and one rotation property where 'r' is 90 degree clock-wise
// (to the 'r'ight) 'u' is 180 degrees ('u'pside-down) and 'l' is
// 270 degrees (to the 'l'eft).
// - zoom-factor is floating value, e.g. @1.5 or @1.25.
// - |resolution list| is the list of size that is given in
// |width x height [% refresh_rate]| separated by '|'.
// A couple of examples:
// "100x100"
// 100x100 window at 0,0 origin. 1x device scale factor. no overscan.
// no rotation. 1.0 zoom factor.
// "5+5-300x200*2"
// 300x200 window at 5,5 origin. 2x device scale factor.
// no overscan, no rotation. 1.0 zoom factor.
// "300x200/ol"
// 300x200 window at 0,0 origin. 1x device scale factor.
// with 5% overscan. rotated to left (90 degree counter clockwise).
// 1.0 zoom factor.
// "10+20-300x200/u@1.5"
// 300x200 window at 10,20 origin. 1x device scale factor.
// no overscan. flipped upside-down (180 degree) and 1.5 zoom factor.
// "200x100#300x200|200x100%59.0|100x100%60"
// 200x100 window at 0,0 origin, with 3 possible resolutions,
// 300x200, 200x100 at 59 Hz, and 100x100 at 60 Hz.
static ManagedDisplayInfo CreateFromSpec(const std::string& spec);
// Creates a ManagedDisplayInfo from string spec using given |id|.
static ManagedDisplayInfo CreateFromSpecWithID(const std::string& spec,
int64_t id);
ManagedDisplayInfo(int64_t id, const std::string& name, bool has_overscan);
ManagedDisplayInfo(const ManagedDisplayInfo& other);
int64_t id() const { return id_; }
// The name of the display.
const std::string& name() const { return name_; }
// The path to the display device in the sysfs filesystem.
void set_sys_path(const base::FilePath& sys_path) { sys_path_ = sys_path; }
const base::FilePath& sys_path() const { return sys_path_; }
// True if the display EDID has the overscan flag. This does not create the
// actual overscan automatically, but used in the message.
bool has_overscan() const { return has_overscan_; }
void set_touch_support(Display::TouchSupport support) {
touch_support_ = support;
Display::TouchSupport touch_support() const { return touch_support_; }
// Gets/Sets the device scale factor of the display.
float device_scale_factor() const { return device_scale_factor_; }
void set_device_scale_factor(float scale) { device_scale_factor_ = scale; }
float zoom_factor() const { return zoom_factor_; }
void set_zoom_factor(float zoom_factor) { zoom_factor_ = zoom_factor; }
void set_is_zoom_factor_from_ui_scale(bool is_zoom_factor_from_ui_scale) {
is_zoom_factor_from_ui_scale_ = is_zoom_factor_from_ui_scale;
bool is_zoom_factor_from_ui_scale() const {
return is_zoom_factor_from_ui_scale_;
float refresh_rate() const { return refresh_rate_; }
void set_refresh_rate(float refresh_rate) { refresh_rate_ = refresh_rate; }
bool is_interlaced() const { return is_interlaced_; }
void set_is_interlaced(bool is_interlaced) { is_interlaced_ = is_interlaced; }
// Gets/Sets the device DPI of the display.
float device_dpi() const { return device_dpi_; }
void set_device_dpi(float dpi) { device_dpi_ = dpi; }
display::PanelOrientation panel_orientation() const {
return panel_orientation_;
void set_panel_orientation(display::PanelOrientation panel_orientation) {
panel_orientation_ = panel_orientation;
// The native bounds for the display. The size of this can be
// different from the |size_in_pixel| when overscan insets are set.
const gfx::Rect& bounds_in_native() const { return bounds_in_native_; }
// The size for the display in pixels.
const gfx::Size& size_in_pixel() const { return size_in_pixel_; }
// The overscan insets for the display in DIP.
const gfx::Insets& overscan_insets_in_dip() const {
return overscan_insets_in_dip_;
// Sets the rotation for the given |source|. Setting a new rotation will also
// have it become the active rotation.
void SetRotation(Display::Rotation rotation, Display::RotationSource source);
// Returns the currently active rotation for this display.
Display::Rotation GetActiveRotation() const;
// Returns the source which set the active rotation for this display.
Display::RotationSource active_rotation_source() const {
return active_rotation_source_;
// Returns the rotation set by a given |source|.
Display::Rotation GetRotation(Display::RotationSource source) const;
// Returns a measure of density relative to a display with 1.0 DSF. Unlike the
// effective DSF, this is independent from the UI scale.
float GetDensityRatio() const;
// Returns the ui scale and device scale factor actually used to create
// display that chrome sees. This can be different from one obtained
// from dispaly or one specified by a user in following situation.
// 1) DSF is 2.0f and UI scale is 2.0f. (Returns 1.0f and 1.0f respectiely)
// 2) A user specified 0.8x on the device that has 1.25 DSF. 1.25 DSF device
// uses 1.0f DFS unless 0.8x UI scaling is specified.
float GetEffectiveDeviceScaleFactor() const;
// Copy the display info except for fields that can be modified by a user
// (|rotation_|). |rotation_| is copied when the |another_info| isn't native
// one.
void Copy(const ManagedDisplayInfo& another_info);
// Update the |bounds_in_native_| and |size_in_pixel_| using
// given |bounds_in_native|.
void SetBounds(const gfx::Rect& bounds_in_native);
// Update the |bounds_in_native| according to the current overscan
// and rotation settings.
void UpdateDisplaySize();
// Sets/Clears the overscan insets.
void SetOverscanInsets(const gfx::Insets& insets_in_dip);
gfx::Insets GetOverscanInsetsInPixel() const;
// Sets/Gets the flag to clear overscan insets.
bool clear_overscan_insets() const { return clear_overscan_insets_; }
void set_clear_overscan_insets(bool clear) { clear_overscan_insets_ = clear; }
void set_native(bool native) { native_ = native; }
bool native() const { return native_; }
const ManagedDisplayModeList& display_modes() const { return display_modes_; }
// Sets the display mode list. The mode list will be sorted for the
// display.
void SetManagedDisplayModes(const ManagedDisplayModeList& display_modes);
// Returns the native mode size. If a native mode is not present, return an
// empty size.
gfx::Size GetNativeModeSize() const;
const gfx::ColorSpace& color_space() const { return color_space_; }
void set_color_space(const gfx::ColorSpace& color_space) {
color_space_ = color_space;
uint32_t bits_per_channel() const { return bits_per_channel_; }
void set_bits_per_channel(uint32_t bits_per_channel) {
bits_per_channel_ = bits_per_channel;
bool is_aspect_preserving_scaling() const {
return is_aspect_preserving_scaling_;
void set_is_aspect_preserving_scaling(bool value) {
is_aspect_preserving_scaling_ = value;
// Maximum cursor size in native pixels.
const gfx::Size& maximum_cursor_size() const { return maximum_cursor_size_; }
void set_maximum_cursor_size(const gfx::Size& size) {
maximum_cursor_size_ = size;
const std::string& manufacturer_id() const { return manufacturer_id_; }
void set_manufacturer_id(const std::string& id) { manufacturer_id_ = id; }
const std::string& product_id() const { return product_id_; }
void set_product_id(const std::string& id) { product_id_ = id; }
int32_t year_of_manufacture() const { return year_of_manufacture_; }
void set_year_of_manufacture(int32_t year) { year_of_manufacture_ = year; }
// Returns a string representation of the ManagedDisplayInfo, excluding
// display modes.
std::string ToString() const;
// Returns a string representation of the ManagedDisplayInfo, including
// display modes.
std::string ToFullString() const;
int64_t id_;
std::string name_;
std::string manufacturer_id_;
std::string product_id_;
int32_t year_of_manufacture_;
base::FilePath sys_path_;
bool has_overscan_;
std::map<Display::RotationSource, Display::Rotation> rotations_;
Display::RotationSource active_rotation_source_;
Display::TouchSupport touch_support_;
// This specifies the device's pixel density. (For example, a display whose
// DPI is higher than the threshold is considered to have device_scale_factor
// = 2.0 on Chrome OS). This is used by the graphics layer to choose and draw
// appropriate images and scale layers properly.
float device_scale_factor_;
gfx::Rect bounds_in_native_;
// This specifies the device's DPI.
float device_dpi_;
// Orientation of the panel relative to natural device orientation.
display::PanelOrientation panel_orientation_;
// The size of the display in use. The size can be different from the size
// of |bounds_in_native_| if the display has overscan insets and/or rotation.
gfx::Size size_in_pixel_;
gfx::Insets overscan_insets_in_dip_;
// The zoom level currently applied to the display. This value is appended
// multiplicatively to the device scale factor to get the effecting scaling
// for a display.
float zoom_factor_;
// The value of the current display mode refresh rate.
float refresh_rate_;
// True if the current display mode is interlaced (i.e. the display's odd
// and even lines are scanned alternately in two interwoven rasterized lines).
bool is_interlaced_;
// True if the |zoom_factor_| currently set is a port of the ui-scale. This is
// needed to correctly compute zoom values and effective device scale factor
// for FHD devices with 1.25 device scale factor.
bool is_zoom_factor_from_ui_scale_;
// True if this comes from native platform (DisplayChangeObserver).
bool native_;
// True if the display is configured to preserve the aspect ratio. When the
// display is configured in a non-native mode, only parts of the display will
// be used such that the aspect ratio is preserved.
bool is_aspect_preserving_scaling_;
// True if the displays' overscan inset should be cleared. This is
// to distinguish the empty overscan insets from native display info.
bool clear_overscan_insets_;
// The list of modes supported by this display.
ManagedDisplayModeList display_modes_;
// Maximum cursor size.
gfx::Size maximum_cursor_size_;
// Colorimetry information of the Display (if IsValid()), including e.g.
// transfer and primaries information, retrieved from its EDID.
gfx::ColorSpace color_space_;
// Bit depth of every channel, extracted from its EDID, usually 8, but can be
// 0 if EDID says so or if the EDID (retrieval) was faulty.
uint32_t bits_per_channel_;
// If you add a new member, you need to update Copy().
// Resets the synthesized display id for testing. This
// is necessary to avoid overflowing the output index.
void DISPLAY_MANAGER_EXPORT ResetDisplayIdForTest();
} // namespace display