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screen_win.cc
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// Copyright 2012 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/win/screen_win.h"
#include <windows.h>
#include <shellscalingapi.h>
#include "base/containers/contains.h"
#include "base/cxx17_backports.h"
#include "base/debug/alias.h"
#include "base/functional/bind.h"
#include "base/functional/callback_helpers.h"
#include "base/metrics/histogram_functions.h"
#include "base/numerics/safe_conversions.h"
#include "base/ranges/algorithm.h"
#include "base/trace_event/trace_event.h"
#include "base/win/win_util.h"
#include "base/win/windows_version.h"
#include "third_party/abseil-cpp/absl/types/optional.h"
#include "ui/display/display.h"
#include "ui/display/display_layout.h"
#include "ui/display/display_layout_builder.h"
#include "ui/display/util/display_util.h"
#include "ui/display/win/display_info.h"
#include "ui/display/win/dpi.h"
#include "ui/display/win/local_process_window_finder_win.h"
#include "ui/display/win/scaling_util.h"
#include "ui/display/win/screen_win_display.h"
#include "ui/gfx/geometry/point_conversions.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/geometry/rect_f.h"
#include "ui/gfx/geometry/size.h"
#include "ui/gfx/geometry/vector2d.h"
#include "ui/gfx/icc_profile.h"
namespace display {
namespace win {
namespace {
// TODO(robliao): http://crbug.com/615514 Remove when ScreenWin usage is
// resolved with Desktop Aura and WindowTreeHost.
ScreenWin* g_instance = nullptr;
// Gets the DPI for a particular monitor.
absl::optional<int> GetPerMonitorDPI(HMONITOR monitor) {
UINT dpi_x, dpi_y;
if (!SUCCEEDED(
::GetDpiForMonitor(monitor, MDT_EFFECTIVE_DPI, &dpi_x, &dpi_y))) {
return absl::nullopt;
}
DCHECK_EQ(dpi_x, dpi_y);
return static_cast<int>(dpi_x);
}
float GetScaleFactorForDPI(int dpi, bool include_accessibility) {
const float scale = display::win::internal::GetScalingFactorFromDPI(dpi);
return include_accessibility
? (scale * UwpTextScaleFactor::Instance()->GetTextScaleFactor())
: scale;
}
// Gets the raw monitor scale factor.
//
// Respects the forced device scale factor, and will fall back to the global
// scale factor if per-monitor DPI is not supported.
float GetMonitorScaleFactor(HMONITOR monitor,
bool include_accessibility = true) {
DCHECK(monitor);
if (Display::HasForceDeviceScaleFactor())
return Display::GetForcedDeviceScaleFactor();
const auto dpi = GetPerMonitorDPI(monitor);
return dpi ? GetScaleFactorForDPI(dpi.value(), include_accessibility)
: GetDPIScale();
}
std::vector<DISPLAYCONFIG_PATH_INFO> GetPathInfos() {
for (LONG result = ERROR_INSUFFICIENT_BUFFER;
result == ERROR_INSUFFICIENT_BUFFER;) {
uint32_t path_elements, mode_elements;
if (GetDisplayConfigBufferSizes(QDC_ONLY_ACTIVE_PATHS, &path_elements,
&mode_elements) != ERROR_SUCCESS) {
return {};
}
std::vector<DISPLAYCONFIG_PATH_INFO> path_infos(path_elements);
std::vector<DISPLAYCONFIG_MODE_INFO> mode_infos(mode_elements);
result = QueryDisplayConfig(QDC_ONLY_ACTIVE_PATHS, &path_elements,
path_infos.data(), &mode_elements,
mode_infos.data(), nullptr);
if (result == ERROR_SUCCESS) {
path_infos.resize(path_elements);
return path_infos;
}
}
return {};
}
absl::optional<DISPLAYCONFIG_PATH_INFO> GetPathInfo(HMONITOR monitor) {
// Get the monitor name.
MONITORINFOEX monitor_info = {};
monitor_info.cbSize = sizeof(monitor_info);
if (!GetMonitorInfo(monitor, &monitor_info))
return absl::nullopt;
// Look for a path info with a matching name.
std::vector<DISPLAYCONFIG_PATH_INFO> path_infos = GetPathInfos();
for (const auto& info : path_infos) {
DISPLAYCONFIG_SOURCE_DEVICE_NAME device_name = {};
device_name.header.type = DISPLAYCONFIG_DEVICE_INFO_GET_SOURCE_NAME;
device_name.header.size = sizeof(device_name);
device_name.header.adapterId = info.sourceInfo.adapterId;
device_name.header.id = info.sourceInfo.id;
if ((DisplayConfigGetDeviceInfo(&device_name.header) == ERROR_SUCCESS) &&
(wcscmp(monitor_info.szDevice, device_name.viewGdiDeviceName) == 0))
return info;
}
return absl::nullopt;
}
// Gets a user-friendly name for a given display using EDID data. Returns an
// empty string if the provided path is unset/nullopt or EDID data is not
// available for the device.
std::string GetFriendlyDeviceName(
const absl::optional<DISPLAYCONFIG_PATH_INFO>& path) {
if (!path)
return std::string();
DISPLAYCONFIG_TARGET_DEVICE_NAME targetName = {};
targetName.header.type = DISPLAYCONFIG_DEVICE_INFO_GET_TARGET_NAME;
targetName.header.size = sizeof(targetName);
targetName.header.adapterId = path->targetInfo.adapterId;
targetName.header.id = path->targetInfo.id;
LONG result = DisplayConfigGetDeviceInfo(&targetName.header);
if (result == ERROR_SUCCESS && targetName.flags.friendlyNameFromEdid)
return base::WideToUTF8(targetName.monitorFriendlyDeviceName);
return std::string();
}
float GetSDRWhiteLevel(const absl::optional<DISPLAYCONFIG_PATH_INFO>& path) {
if (path) {
DISPLAYCONFIG_SDR_WHITE_LEVEL white_level = {};
white_level.header.type = DISPLAYCONFIG_DEVICE_INFO_GET_SDR_WHITE_LEVEL;
white_level.header.size = sizeof(white_level);
white_level.header.adapterId = path->targetInfo.adapterId;
white_level.header.id = path->targetInfo.id;
if (DisplayConfigGetDeviceInfo(&white_level.header) == ERROR_SUCCESS)
return white_level.SDRWhiteLevel * 80.0 / 1000.0; // From wingdi.h.
}
return 200.0f;
}
DISPLAYCONFIG_VIDEO_OUTPUT_TECHNOLOGY GetOutputTechnology(
const absl::optional<DISPLAYCONFIG_PATH_INFO>& path) {
if (path)
return path->targetInfo.outputTechnology;
return DISPLAYCONFIG_OUTPUT_TECHNOLOGY_OTHER;
}
// Returns true if |tech| represents an internal display (eg. a laptop screen).
bool IsInternalOutputTechnology(DISPLAYCONFIG_VIDEO_OUTPUT_TECHNOLOGY tech) {
switch (tech) {
case DISPLAYCONFIG_OUTPUT_TECHNOLOGY_INTERNAL:
case DISPLAYCONFIG_OUTPUT_TECHNOLOGY_DISPLAYPORT_EMBEDDED:
case DISPLAYCONFIG_OUTPUT_TECHNOLOGY_UDI_EMBEDDED:
return true;
default:
return false;
}
}
Display::Rotation OrientationToRotation(DWORD orientation) {
switch (orientation) {
case DMDO_DEFAULT:
return Display::ROTATE_0;
case DMDO_90:
return Display::ROTATE_90;
case DMDO_180:
return Display::ROTATE_180;
case DMDO_270:
return Display::ROTATE_270;
default:
NOTREACHED();
return Display::ROTATE_0;
}
}
struct DisplaySettings {
Display::Rotation rotation;
int frequency;
};
DisplaySettings GetDisplaySettingsForDevice(const wchar_t* device_name) {
DEVMODE mode = {};
mode.dmSize = sizeof(mode);
if (!::EnumDisplaySettings(device_name, ENUM_CURRENT_SETTINGS, &mode))
return {Display::ROTATE_0, 0};
return {OrientationToRotation(mode.dmDisplayOrientation),
static_cast<int>(mode.dmDisplayFrequency)};
}
std::vector<internal::DisplayInfo> FindAndRemoveTouchingDisplayInfos(
const internal::DisplayInfo& parent_info,
std::vector<internal::DisplayInfo>* display_infos) {
const auto first_touching_it = std::partition(
display_infos->begin(), display_infos->end(),
[&](const auto& info) { return !DisplayInfosTouch(parent_info, info); });
std::vector<internal::DisplayInfo> touching_display_infos(
first_touching_it, display_infos->end());
display_infos->erase(first_touching_it, display_infos->end());
return touching_display_infos;
}
// Helper function to create gfx::DisplayColorSpaces from given |color_space|
// and |sdr_white_level| with default buffer formats for Windows.
gfx::DisplayColorSpaces CreateDisplayColorSpaces(
const gfx::ColorSpace& color_space,
float sdr_white_level) {
gfx::DisplayColorSpaces display_color_spaces(color_space);
// When alpha is not needed, specify BGRX_8888 to get
// DXGI_ALPHA_MODE_IGNORE. This saves significant power (see
// https://crbug.com/1057163).
display_color_spaces.SetOutputBufferFormats(gfx::BufferFormat::BGRX_8888,
gfx::BufferFormat::BGRA_8888);
display_color_spaces.SetSDRMaxLuminanceNits(sdr_white_level);
return display_color_spaces;
}
// Updates |color_spaces| for HDR and WCG content usage with appropriate color
// HDR spaces and given |sdr_white_level|.
gfx::DisplayColorSpaces GetDisplayColorSpacesForHdr(
float sdr_white_level,
const gfx::mojom::DXGIOutputDesc* dxgi_output_desc) {
auto color_spaces =
CreateDisplayColorSpaces(gfx::ColorSpace::CreateSRGB(), sdr_white_level);
// Set the primaries and the HDR max luminance from the DXGIOutputDesc.
float hdr_max_luminance_relative = 0.f;
if (dxgi_output_desc) {
if (dxgi_output_desc->hdr_enabled) {
hdr_max_luminance_relative =
dxgi_output_desc->max_luminance / sdr_white_level;
}
color_spaces.SetPrimaries(dxgi_output_desc->primaries);
}
hdr_max_luminance_relative =
std::max(hdr_max_luminance_relative, kMinHDRCapableMaxLuminanceRelative);
color_spaces.SetHDRMaxLuminanceRelative(hdr_max_luminance_relative);
// This will map to DXGI_COLOR_SPACE_RGB_FULL_G10_NONE_P709. In that space,
// the brightness of (1,1,1) is 80 nits.
const auto scrgb_linear = gfx::ColorSpace::CreateSCRGBLinear80Nits();
// This will map to DXGI_COLOR_SPACE_RGB_FULL_G2084_NONE_P2020, with sRGB's
// (1,1,1) mapping to the specified number of nits.
const auto hdr10 = gfx::ColorSpace::CreateHDR10();
// Use HDR color spaces only when there is WCG or HDR content on the screen.
constexpr bool kNeedsAlpha = true;
for (const auto& usage : {gfx::ContentColorUsage::kWideColorGamut,
gfx::ContentColorUsage::kHDR}) {
// Using RGBA F16 backbuffers required by SCRGB linear causes stuttering on
// Windows RS3, but RGB10A2 with HDR10 color space works fine (see
// https://crbug.com/937108#c92).
if (base::win::GetVersion() > base::win::Version::WIN10_RS3) {
color_spaces.SetOutputColorSpaceAndBufferFormat(
usage, !kNeedsAlpha, scrgb_linear, gfx::BufferFormat::RGBA_F16);
} else {
color_spaces.SetOutputColorSpaceAndBufferFormat(
usage, !kNeedsAlpha, hdr10, gfx::BufferFormat::RGBA_1010102);
}
// Use RGBA F16 backbuffers for HDR if alpha channel is required.
color_spaces.SetOutputColorSpaceAndBufferFormat(
usage, kNeedsAlpha, scrgb_linear, gfx::BufferFormat::RGBA_F16);
}
return color_spaces;
}
// Sets SDR white level and buffer formats on |display_color_spaces| when using
// a forced color profile.
gfx::DisplayColorSpaces GetForcedDisplayColorSpaces() {
// Adjust white level to a default value irrespective of whether the color
// space is scRGB linear (defaults to 80 nits) or PQ (defaults to 100 nits).
const auto& color_space = GetForcedDisplayColorProfile();
auto display_color_spaces = CreateDisplayColorSpaces(
color_space, gfx::ColorSpace::kDefaultSDRWhiteLevel);
// Use the forced color profile's buffer format for all content usages.
if (color_space.GetTransferID() == gfx::ColorSpace::TransferID::PQ) {
display_color_spaces.SetOutputBufferFormats(
gfx::BufferFormat::RGBA_1010102, gfx::BufferFormat::RGBA_1010102);
} else if (color_space.IsHDR()) {
display_color_spaces.SetOutputBufferFormats(gfx::BufferFormat::RGBA_F16,
gfx::BufferFormat::RGBA_F16);
}
return display_color_spaces;
}
Display CreateDisplayFromDisplayInfo(
const internal::DisplayInfo& display_info,
const ColorProfileReader* color_profile_reader,
const gfx::mojom::DXGIOutputDesc* dxgi_output_desc,
bool hdr_enabled_on_any_display) {
const float scale_factor = display_info.device_scale_factor();
const gfx::Rect bounds = gfx::ScaleToEnclosingRect(display_info.screen_rect(),
1.0f / scale_factor);
Display display(display_info.id(), bounds);
display.set_device_scale_factor(scale_factor);
display.set_work_area(gfx::ScaleToEnclosingRect(
display_info.screen_work_rect(), 1.0f / scale_factor));
display.set_rotation(display_info.rotation());
display.set_display_frequency(display_info.display_frequency());
display.set_label(display_info.label());
// DisplayColorSpaces is created using the forced color profile if present, or
// from the ICC profile provided by |color_profile_reader| for SDR content,
// and HDR10 or scRGB linear for HDR and WCG content if HDR is enabled.
gfx::DisplayColorSpaces color_spaces;
if (HasForceDisplayColorProfile()) {
color_spaces = GetForcedDisplayColorSpaces();
} else if (hdr_enabled_on_any_display) {
// TODO(https://crbug.com/1339352): Do not allow non-HDR-enabled displays
// to use HDR color spaces.
color_spaces = GetDisplayColorSpacesForHdr(display_info.sdr_white_level(),
dxgi_output_desc);
} else {
color_spaces = CreateDisplayColorSpaces(
color_profile_reader->GetDisplayColorSpace(display.id()),
gfx::ColorSpace::kDefaultSDRWhiteLevel);
}
if (color_spaces.SupportsHDR()) {
// These are (ab)used by pages via media query APIs to detect HDR support.
display.set_color_depth(Display::kHDR10BitsPerPixel);
display.set_depth_per_component(Display::kHDR10BitsPerComponent);
}
display.set_color_spaces(color_spaces);
return display;
}
// Windows historically has had a hard time handling displays of DPIs higher
// than 96. Handling multiple DPI displays means we have to deal with Windows'
// monitor physical coordinates and map into Chrome's DIP coordinates.
//
// To do this, DisplayInfosToScreenWinDisplays reasons over monitors as a tree
// using the primary monitor as the root. All monitors touching this root are
// considered children.
//
// This also presumes that all monitors are connected components. By UI
// construction, Windows restricts the layout of monitors to connected
// components except when DPI virtualization is happening. When this happens, we
// scale relative to (0, 0).
//
// Note that this does not handle cases where a scaled display may have
// insufficient room to lay out its children. In these cases, a DIP point could
// map to multiple screen points due to overlap. The first discovered screen
// will take precedence.
std::vector<ScreenWinDisplay> DisplayInfosToScreenWinDisplays(
const std::vector<internal::DisplayInfo>& display_infos,
ColorProfileReader* color_profile_reader,
gfx::mojom::DXGIInfo* dxgi_info) {
if (display_infos.empty()) {
return {};
}
// Find and extract the primary display.
std::vector<internal::DisplayInfo> display_infos_remaining = display_infos;
auto primary_display_iter = base::ranges::find_if(
display_infos_remaining, [](const internal::DisplayInfo& display_info) {
return display_info.screen_rect().origin().IsOrigin();
});
if (primary_display_iter == display_infos_remaining.end()) {
return {};
}
// Build the tree and determine DisplayPlacements along the way.
DisplayLayoutBuilder builder(primary_display_iter->id());
std::vector<internal::DisplayInfo> available_parents = {
*primary_display_iter};
display_infos_remaining.erase(primary_display_iter);
while (!available_parents.empty()) {
const internal::DisplayInfo parent = available_parents.back();
available_parents.pop_back();
for (const auto& child :
FindAndRemoveTouchingDisplayInfos(parent, &display_infos_remaining)) {
builder.AddDisplayPlacement(CalculateDisplayPlacement(parent, child));
available_parents.push_back(child);
}
}
// Construct a map from display IDs to DXGI output descriptors.
std::map<int64_t, const gfx::mojom::DXGIOutputDesc*> dxgi_output_descs;
bool hdr_enabled_on_any_display = false;
if (dxgi_info) {
for (const auto& dxgi_output_desc : dxgi_info->output_descs) {
hdr_enabled_on_any_display |= dxgi_output_desc->hdr_enabled;
dxgi_output_descs[internal::DisplayInfo::DeviceIdFromDeviceName(
dxgi_output_desc->device_name.c_str())] = dxgi_output_desc.get();
}
}
// Layout and create the ScreenWinDisplays.
std::vector<Display> displays;
for (const auto& display_info : display_infos) {
displays.push_back(CreateDisplayFromDisplayInfo(
display_info, color_profile_reader,
dxgi_output_descs[display_info.id()], hdr_enabled_on_any_display));
}
builder.Build()->ApplyToDisplayList(&displays, nullptr, 0);
std::vector<ScreenWinDisplay> screen_win_displays;
for (size_t i = 0; i < display_infos.size(); ++i)
screen_win_displays.emplace_back(displays[i], display_infos[i]);
return screen_win_displays;
}
std::vector<Display> ScreenWinDisplaysToDisplays(
const std::vector<ScreenWinDisplay>& screen_win_displays) {
std::vector<Display> displays;
for (const auto& screen_win_display : screen_win_displays)
displays.push_back(screen_win_display.display());
return displays;
}
MONITORINFOEX MonitorInfoFromHMONITOR(HMONITOR monitor) {
MONITORINFOEX monitor_info = {};
monitor_info.cbSize = sizeof(monitor_info);
::GetMonitorInfo(monitor, &monitor_info);
return monitor_info;
}
absl::optional<gfx::Vector2dF> GetPixelsPerInchForPointerDevice(
HANDLE source_device) {
static const auto get_pointer_device_rects =
reinterpret_cast<decltype(&::GetPointerDeviceRects)>(
base::win::GetUser32FunctionPointer("GetPointerDeviceRects"));
RECT device_rect, screen_rect;
if (!get_pointer_device_rects ||
!get_pointer_device_rects(source_device, &device_rect, &screen_rect))
return absl::nullopt;
const gfx::RectF device{gfx::Rect(device_rect)};
const gfx::RectF screen{gfx::Rect(screen_rect)};
constexpr float kHimetricPerInch = 2540.0f;
const float himetric_per_pixel_x = device.width() / screen.width();
const float himetric_per_pixel_y = device.height() / screen.height();
return gfx::Vector2dF(kHimetricPerInch / himetric_per_pixel_x,
kHimetricPerInch / himetric_per_pixel_y);
}
// Returns physical pixels per inch based on 96 dpi monitor.
gfx::Vector2dF GetDefaultMonitorPhysicalPixelsPerInch() {
const int default_dpi = GetDPIFromScalingFactor(1.0f);
return gfx::Vector2dF(default_dpi, default_dpi);
}
// Retrieves PPI for |monitor| based on touch pointer device handles. Returns
// nullopt if a pointer device for |monitor| can't be found.
absl::optional<gfx::Vector2dF> GetMonitorPixelsPerInch(HMONITOR monitor) {
static const auto get_pointer_devices =
reinterpret_cast<decltype(&::GetPointerDevices)>(
base::win::GetUser32FunctionPointer("GetPointerDevices"));
uint32_t pointer_device_count = 0;
if (!get_pointer_devices ||
!get_pointer_devices(&pointer_device_count, nullptr) ||
(pointer_device_count == 0))
return absl::nullopt;
std::vector<POINTER_DEVICE_INFO> pointer_devices(pointer_device_count);
if (!get_pointer_devices(&pointer_device_count, pointer_devices.data()))
return absl::nullopt;
for (const auto& device : pointer_devices) {
if (device.pointerDeviceType == POINTER_DEVICE_TYPE_TOUCH &&
device.monitor == monitor)
return GetPixelsPerInchForPointerDevice(device.device);
}
return absl::nullopt;
}
BOOL CALLBACK EnumMonitorForDisplayInfoCallback(HMONITOR monitor,
HDC hdc,
LPRECT rect,
LPARAM data) {
const MONITORINFOEX monitor_info = MonitorInfoFromHMONITOR(monitor);
const auto display_settings =
GetDisplaySettingsForDevice(monitor_info.szDevice);
const gfx::Vector2dF pixels_per_inch =
GetMonitorPixelsPerInch(monitor).value_or(
GetDefaultMonitorPhysicalPixelsPerInch());
const auto path_info = GetPathInfo(monitor);
auto* display_infos =
reinterpret_cast<std::vector<internal::DisplayInfo>*>(data);
DCHECK(display_infos);
display_infos->emplace_back(
monitor_info, GetMonitorScaleFactor(monitor), GetSDRWhiteLevel(path_info),
display_settings.rotation, display_settings.frequency, pixels_per_inch,
GetOutputTechnology(path_info), GetFriendlyDeviceName(path_info));
return TRUE;
}
std::vector<internal::DisplayInfo> GetDisplayInfosFromSystem() {
std::vector<internal::DisplayInfo> display_infos;
EnumDisplayMonitors(nullptr, nullptr, EnumMonitorForDisplayInfoCallback,
reinterpret_cast<LPARAM>(&display_infos));
DCHECK_EQ(::GetSystemMetrics(SM_CMONITORS),
static_cast<int>(display_infos.size()));
return display_infos;
}
// Returns |point|, transformed from |from_origin|'s to |to_origin|'s
// coordinates, which differ by |scale_factor|.
gfx::PointF ScalePointRelative(const gfx::PointF& point,
const gfx::Point& from_origin,
const gfx::Point& to_origin,
const float scale_factor) {
const gfx::PointF relative_point = point - from_origin.OffsetFromOrigin();
const gfx::PointF scaled_relative_point =
gfx::ScalePoint(relative_point, scale_factor);
return scaled_relative_point + to_origin.OffsetFromOrigin();
}
gfx::PointF ScreenToDIPPoint(const gfx::PointF& screen_point,
const ScreenWinDisplay& screen_win_display) {
const Display display = screen_win_display.display();
return ScalePointRelative(
screen_point, screen_win_display.pixel_bounds().origin(),
display.bounds().origin(), 1.0f / display.device_scale_factor());
}
gfx::Point DIPToScreenPoint(const gfx::Point& dip_point,
const ScreenWinDisplay& screen_win_display) {
const Display display = screen_win_display.display();
return gfx::ToFlooredPoint(
ScalePointRelative(gfx::PointF(dip_point), display.bounds().origin(),
screen_win_display.pixel_bounds().origin(),
display.device_scale_factor()));
}
} // namespace
ScreenWin::ScreenWin() : ScreenWin(true) {}
ScreenWin::~ScreenWin() {
DCHECK_EQ(g_instance, this);
g_instance = nullptr;
}
// static
gfx::PointF ScreenWin::ScreenToDIPPoint(const gfx::PointF& pixel_point) {
const ScreenWinDisplay screen_win_display =
GetScreenWinDisplayVia(&ScreenWin::GetScreenWinDisplayNearestScreenPoint,
gfx::ToFlooredPoint(pixel_point));
return display::win::ScreenToDIPPoint(pixel_point, screen_win_display);
}
// static
gfx::Point ScreenWin::DIPToScreenPoint(const gfx::Point& dip_point) {
const ScreenWinDisplay screen_win_display = GetScreenWinDisplayVia(
&ScreenWin::GetScreenWinDisplayNearestDIPPoint, dip_point);
return display::win::DIPToScreenPoint(dip_point, screen_win_display);
}
// static
gfx::Point ScreenWin::ClientToDIPPoint(HWND hwnd,
const gfx::Point& client_point) {
return ScaleToFlooredPoint(client_point, 1.0f / GetScaleFactorForHWND(hwnd));
}
// static
gfx::Point ScreenWin::DIPToClientPoint(HWND hwnd, const gfx::Point& dip_point) {
return ScaleToFlooredPoint(dip_point, GetScaleFactorForHWND(hwnd));
}
// static
gfx::Rect ScreenWin::ScreenToDIPRect(HWND hwnd, const gfx::Rect& pixel_bounds) {
const ScreenWinDisplay screen_win_display = hwnd
? GetScreenWinDisplayVia(&ScreenWin::GetScreenWinDisplayNearestHWND, hwnd)
: GetScreenWinDisplayVia(
&ScreenWin::GetScreenWinDisplayNearestScreenRect, pixel_bounds);
const gfx::Point origin = gfx::ToFlooredPoint(display::win::ScreenToDIPPoint(
gfx::PointF(pixel_bounds.origin()), screen_win_display));
const float scale_factor =
1.0f / screen_win_display.display().device_scale_factor();
return {origin, ScaleToEnclosingRect(pixel_bounds, scale_factor).size()};
}
// static
gfx::Rect ScreenWin::DIPToScreenRect(HWND hwnd, const gfx::Rect& dip_bounds) {
// The HWND parameter is needed for cases where Chrome windows span monitors
// that have different DPI settings. This is known to matter when using the OS
// IME support. See https::/crbug.com/1224715 for more details.
const ScreenWinDisplay screen_win_display = hwnd
? GetScreenWinDisplayVia(&ScreenWin::GetScreenWinDisplayNearestHWND, hwnd)
: GetScreenWinDisplayVia(
&ScreenWin::GetScreenWinDisplayNearestDIPRect, dip_bounds);
const gfx::Point origin =
display::win::DIPToScreenPoint(dip_bounds.origin(), screen_win_display);
const float scale_factor = screen_win_display.display().device_scale_factor();
return {origin, ScaleToEnclosingRect(dip_bounds, scale_factor).size()};
}
// static
gfx::Rect ScreenWin::ClientToDIPRect(HWND hwnd, const gfx::Rect& pixel_bounds) {
return ScaleToEnclosingRect(pixel_bounds, 1.0f / GetScaleFactorForHWND(hwnd));
}
// static
gfx::Rect ScreenWin::DIPToClientRect(HWND hwnd, const gfx::Rect& dip_bounds) {
return ScaleToEnclosingRect(dip_bounds, GetScaleFactorForHWND(hwnd));
}
// static
gfx::Size ScreenWin::ScreenToDIPSize(HWND hwnd,
const gfx::Size& size_in_pixels) {
// Always ceil sizes. Otherwise we may be leaving off part of the bounds.
return ScaleToCeiledSize(size_in_pixels, 1.0f / GetScaleFactorForHWND(hwnd));
}
// static
gfx::Size ScreenWin::DIPToScreenSize(HWND hwnd, const gfx::Size& dip_size) {
// Always ceil sizes. Otherwise we may be leaving off part of the bounds.
return ScaleToCeiledSize(dip_size, GetScaleFactorForHWND(hwnd));
}
// static
int ScreenWin::GetSystemMetricsForMonitor(HMONITOR monitor, int metric) {
if (!g_instance)
return ::GetSystemMetrics(metric);
// Fall back to the primary display's HMONITOR.
if (!monitor)
monitor = MonitorFromWindow(nullptr, MONITOR_DEFAULTTOPRIMARY);
// We don't include fudge factors stemming from accessibility features when
// dealing with system metrics associated with window elements drawn by the
// operating system, since we will not be doing scaling of those metrics
// ourselves.
const bool include_accessibility = (metric != SM_CXSIZEFRAME) &&
(metric != SM_CYSIZEFRAME) &&
(metric != SM_CXPADDEDBORDER);
// We'll then pull up the system metrics scaled by the appropriate amount.
return g_instance->GetSystemMetricsForScaleFactor(
GetMonitorScaleFactor(monitor, include_accessibility), metric);
}
// static
int ScreenWin::GetSystemMetricsInDIP(int metric) {
return g_instance ? g_instance->GetSystemMetricsForScaleFactor(1.0f, metric)
: ::GetSystemMetrics(metric);
}
// static
float ScreenWin::GetScaleFactorForHWND(HWND hwnd) {
const HWND root_hwnd = g_instance ? g_instance->GetRootWindow(hwnd) : hwnd;
const ScreenWinDisplay screen_win_display = GetScreenWinDisplayVia(
&ScreenWin::GetScreenWinDisplayNearestHWND, root_hwnd);
return screen_win_display.display().device_scale_factor();
}
// static
gfx::Vector2dF ScreenWin::GetPixelsPerInch(const gfx::PointF& point) {
const ScreenWinDisplay screen_win_display =
GetScreenWinDisplayVia(&ScreenWin::GetScreenWinDisplayNearestDIPPoint,
gfx::ToFlooredPoint(point));
return screen_win_display.pixels_per_inch();
}
// static
int ScreenWin::GetDPIForHWND(HWND hwnd) {
if (Display::HasForceDeviceScaleFactor())
return GetDPIFromScalingFactor(Display::GetForcedDeviceScaleFactor());
const HMONITOR monitor = MonitorFromWindow(hwnd, MONITOR_DEFAULTTONEAREST);
return GetPerMonitorDPI(monitor).value_or(
display::win::internal::GetDefaultSystemDPI());
}
// static
float ScreenWin::GetScaleFactorForDPI(int dpi) {
return display::win::GetScaleFactorForDPI(dpi, true);
}
// static
float ScreenWin::GetSystemScaleFactor() {
return display::win::internal::GetUnforcedDeviceScaleFactor();
}
// static
void ScreenWin::SetRequestHDRStatusCallback(
RequestHDRStatusCallback request_hdr_status_callback) {
if (g_instance) {
g_instance->request_hdr_status_callback_ =
std::move(request_hdr_status_callback);
g_instance->request_hdr_status_callback_.Run();
}
}
// static
void ScreenWin::SetDXGIInfo(gfx::mojom::DXGIInfoPtr dxgi_info) {
if (g_instance && !mojo::Equals(g_instance->dxgi_info_, dxgi_info)) {
g_instance->dxgi_info_ = std::move(dxgi_info);
g_instance->UpdateAllDisplaysAndNotify();
}
}
// static
ScreenWinDisplay ScreenWin::GetScreenWinDisplayWithDisplayId(int64_t id) {
if (!g_instance)
return ScreenWinDisplay();
const auto it = base::ranges::find(
g_instance->screen_win_displays_, id,
[](const auto& display) { return display.display().id(); });
// There is 1:1 correspondence between MONITORINFOEX and ScreenWinDisplay.
// If we found no screens, either there are no screens, or we're in the midst
// of updating our screens (see crbug.com/768845); either way, hand out the
// default display.
return (it == g_instance->screen_win_displays_.cend()) ? ScreenWinDisplay()
: *it;
}
// static
int64_t ScreenWin::DeviceIdFromDeviceName(const wchar_t* device_name) {
return display::win::internal::DisplayInfo::DeviceIdFromDeviceName(
device_name);
}
// static
void ScreenWin::UpdateDisplayInfos() {
if (g_instance)
g_instance->UpdateAllDisplaysAndNotify();
}
HWND ScreenWin::GetHWNDFromNativeWindow(gfx::NativeWindow window) const {
NOTREACHED();
return nullptr;
}
gfx::NativeWindow ScreenWin::GetNativeWindowFromHWND(HWND hwnd) const {
NOTREACHED();
return nullptr;
}
bool ScreenWin::IsNativeWindowOccluded(gfx::NativeWindow window) const {
NOTREACHED();
return false;
}
absl::optional<bool> ScreenWin::IsWindowOnCurrentVirtualDesktop(
gfx::NativeWindow window) const {
NOTREACHED();
return absl::nullopt;
}
ScreenWin::ScreenWin(bool initialize_from_system)
: per_process_dpi_awareness_disabled_for_testing_(!initialize_from_system) {
DCHECK(!g_instance);
g_instance = this;
if (initialize_from_system) {
Initialize();
}
}
gfx::Point ScreenWin::GetCursorScreenPoint() {
POINT pt;
::GetCursorPos(&pt);
return gfx::ToFlooredPoint(ScreenToDIPPoint(gfx::PointF(gfx::Point(pt))));
}
bool ScreenWin::IsWindowUnderCursor(gfx::NativeWindow window) {
POINT cursor_loc;
return ::GetCursorPos(&cursor_loc) &&
(GetNativeWindowFromHWND(::WindowFromPoint(cursor_loc)) == window);
}
gfx::NativeWindow ScreenWin::GetWindowAtScreenPoint(const gfx::Point& point) {
const gfx::Point screen_point = DIPToScreenPoint(point);
return GetNativeWindowFromHWND(WindowFromPoint(screen_point.ToPOINT()));
}
gfx::NativeWindow ScreenWin::GetLocalProcessWindowAtPoint(
const gfx::Point& point,
const std::set<gfx::NativeWindow>& ignore) {
std::set<HWND> hwnd_set;
for (auto* const window : ignore) {
HWND w = GetHWNDFromNativeWindow(window);
if (w)
hwnd_set.emplace(w);
}
return LocalProcessWindowFinder::GetProcessWindowAtPoint(point, hwnd_set,
this);
}
int ScreenWin::GetNumDisplays() const {
return static_cast<int>(screen_win_displays_.size());
}
const std::vector<Display>& ScreenWin::GetAllDisplays() const {
return displays_;
}
Display ScreenWin::GetDisplayNearestWindow(gfx::NativeWindow window) const {
const HWND window_hwnd = window ? GetHWNDFromNativeWindow(window) : nullptr;
// When |window| isn't rooted to a display, we should just return the default
// display so we get some correct display information like the scaling factor.
return window_hwnd ? GetScreenWinDisplayNearestHWND(window_hwnd).display()
: GetPrimaryDisplay();
}
Display ScreenWin::GetDisplayNearestPoint(const gfx::Point& point) const {
const gfx::Point screen_point = DIPToScreenPoint(point);
return GetScreenWinDisplayNearestScreenPoint(screen_point).display();
}
Display ScreenWin::GetDisplayMatching(const gfx::Rect& match_rect) const {
const gfx::Rect screen_rect = DIPToScreenRect(nullptr, match_rect);
return GetScreenWinDisplayNearestScreenRect(screen_rect).display();
}
Display ScreenWin::GetPrimaryDisplay() const {
return GetPrimaryScreenWinDisplay().display();
}
void ScreenWin::AddObserver(DisplayObserver* observer) {
change_notifier_.AddObserver(observer);
}
void ScreenWin::RemoveObserver(DisplayObserver* observer) {
change_notifier_.RemoveObserver(observer);
}
gfx::Rect ScreenWin::ScreenToDIPRectInWindow(
gfx::NativeWindow window,
const gfx::Rect& screen_rect) const {
const HWND hwnd = window ? GetHWNDFromNativeWindow(window) : nullptr;
return ScreenToDIPRect(hwnd, screen_rect);
}
gfx::Rect ScreenWin::DIPToScreenRectInWindow(gfx::NativeWindow window,
const gfx::Rect& dip_rect) const {
const HWND hwnd = window ? GetHWNDFromNativeWindow(window) : nullptr;
return DIPToScreenRect(hwnd, dip_rect);
}
void ScreenWin::UpdateFromDisplayInfos(
const std::vector<internal::DisplayInfo>& display_infos) {
screen_win_displays_ = DisplayInfosToScreenWinDisplays(
display_infos, color_profile_reader_.get(), dxgi_info_.get());
displays_ = ScreenWinDisplaysToDisplays(screen_win_displays_);
std::vector<int64_t> internal_display_ids;
for (const auto& display_info : display_infos) {
if (IsInternalOutputTechnology(display_info.output_technology())) {
internal_display_ids.push_back(display_info.id());
break;
}
}
SetInternalDisplayIds(internal_display_ids);
}
void ScreenWin::Initialize() {
color_profile_reader_->UpdateIfNeeded();
singleton_hwnd_observer_ = std::make_unique<gfx::SingletonHwndObserver>(
base::BindRepeating(&ScreenWin::OnWndProc, base::Unretained(this)));
UpdateFromDisplayInfos(GetDisplayInfosFromSystem());
RecordDisplayScaleFactors();
// We want to remember that we've observed a screen metrics object so that we
// can remove ourselves as an observer at some later point (either when the
// metrics object notifies us it's going away or when we are destructed).
scale_factor_observation_.Observe(UwpTextScaleFactor::Instance());
}
MONITORINFOEX ScreenWin::MonitorInfoFromScreenPoint(
const gfx::Point& screen_point) const {
return MonitorInfoFromHMONITOR(
::MonitorFromPoint(screen_point.ToPOINT(), MONITOR_DEFAULTTONEAREST));
}
MONITORINFOEX ScreenWin::MonitorInfoFromScreenRect(const gfx::Rect& screen_rect)
const {
const RECT win_rect = screen_rect.ToRECT();
return MonitorInfoFromHMONITOR(
::MonitorFromRect(&win_rect, MONITOR_DEFAULTTONEAREST));
}
MONITORINFOEX ScreenWin::MonitorInfoFromWindow(HWND hwnd,
DWORD default_options) const {
return MonitorInfoFromHMONITOR(::MonitorFromWindow(hwnd, default_options));
}
HWND ScreenWin::GetRootWindow(HWND hwnd) const {
return ::GetAncestor(hwnd, GA_ROOT);
}
int ScreenWin::GetSystemMetrics(int metric) const {
return ::GetSystemMetrics(metric);
}
void ScreenWin::OnWndProc(HWND hwnd,
UINT message,
WPARAM wparam,
LPARAM lparam) {
if (message != WM_DISPLAYCHANGE &&
(message != WM_ACTIVATEAPP || wparam != TRUE) &&
(message != WM_SETTINGCHANGE || wparam != SPI_SETWORKAREA))
return;
TRACE_EVENT1("ui", "ScreenWin::OnWndProc", "message", message);
color_profile_reader_->UpdateIfNeeded();
if (request_hdr_status_callback_)
request_hdr_status_callback_.Run();
UpdateAllDisplaysAndNotify();
}
void ScreenWin::OnColorProfilesChanged() {
// The color profile reader will often just confirm that our guess that the
// color profile was sRGB was indeed correct. Avoid doing an update in these
// cases.
if (base::ranges::any_of(displays_, [this](const auto& display) {
return display.color_spaces().GetRasterColorSpace() !=
color_profile_reader_->GetDisplayColorSpace(display.id());
}))
UpdateAllDisplaysAndNotify();
}
void ScreenWin::UpdateAllDisplaysAndNotify() {
TRACE_EVENT0("ui", "ScreenWin::UpdateAllDisplaysAndNotify");
std::vector<Display> old_displays = std::move(displays_);
UpdateFromDisplayInfos(GetDisplayInfosFromSystem());
// It's possible notifying of display changes may trigger reentrancy. Copy
// `displays_` to ensure there are no problems if reentrancy happens.
std::vector<Display> displays_copy = displays_;
change_notifier_.NotifyDisplaysChanged(old_displays, displays_copy);
}
ScreenWinDisplay ScreenWin::GetScreenWinDisplayNearestHWND(HWND hwnd) const {
return GetScreenWinDisplay(MonitorInfoFromWindow(hwnd,
MONITOR_DEFAULTTONEAREST));
}
ScreenWinDisplay ScreenWin::GetScreenWinDisplayNearestScreenRect(
const gfx::Rect& screen_rect) const {
return GetScreenWinDisplay(MonitorInfoFromScreenRect(screen_rect));
}
ScreenWinDisplay ScreenWin::GetScreenWinDisplayNearestScreenPoint(
const gfx::Point& screen_point) const {
return GetScreenWinDisplay(MonitorInfoFromScreenPoint(screen_point));
}
ScreenWinDisplay ScreenWin::GetScreenWinDisplayNearestDIPPoint(
const gfx::Point& dip_point) const {
ScreenWinDisplay primary_screen_win_display;
for (const auto& screen_win_display : screen_win_displays_) {
const gfx::Rect dip_bounds = screen_win_display.display().bounds();
if (dip_bounds.Contains(dip_point))
return screen_win_display;
if (dip_bounds.origin().IsOrigin())
primary_screen_win_display = screen_win_display;
}
return primary_screen_win_display;
}
ScreenWinDisplay ScreenWin::GetScreenWinDisplayNearestDIPRect(
const gfx::Rect& dip_rect) const {
const auto first_closer = [dip_rect](const auto& display1,
const auto& display2) {
return SquaredDistanceBetweenRects(dip_rect, display1.display().bounds()) <
SquaredDistanceBetweenRects(dip_rect, display2.display().bounds());
};
const auto it = std::min_element(screen_win_displays_.cbegin(),
screen_win_displays_.cend(), first_closer);
return (it == screen_win_displays_.cend()) ? ScreenWinDisplay() : *it;
}
ScreenWinDisplay ScreenWin::GetPrimaryScreenWinDisplay() const {
const ScreenWinDisplay screen_win_display = GetScreenWinDisplay(
MonitorInfoFromWindow(nullptr, MONITOR_DEFAULTTOPRIMARY));
// For help in diagnosing https://crbug.com/1413940.
auto bounds = screen_win_display.display().bounds();
base::debug::Alias(&bounds);
// The Windows primary monitor is defined to have an origin of (0, 0).
// Don't DCHECK if GetScreenWinDisplay returns the default monitor.
DCHECK(screen_win_display.display().bounds().origin().IsOrigin() ||
!screen_win_display.display().is_valid());
return screen_win_display;
}
ScreenWinDisplay ScreenWin::GetScreenWinDisplay(
const MONITORINFOEX& monitor_info) const {
const int64_t id =
internal::DisplayInfo::DeviceIdFromDeviceName(monitor_info.szDevice);
const auto it = base::ranges::find(
screen_win_displays_, id,
[](const auto& display) { return display.display().id(); });