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#include "displayserver.h"
#include "common/edidHelper.h"
#include "common/windows/registry.h"
#include "common/windows/unicode.h"
#include <windows.h>
#include <shellscalingapi.h>
static inline void freeArgBuffer(FFArgBuffer* buffer) {
if (buffer->data) {
free(buffer->data);
}
buffer->data = NULL;
buffer->length = 0;
}
#define FF_AUTO_FREE_ARG_BUFFER FF_A_CLEANUP(freeArgBuffer)
// http://undoc.airesoft.co.uk/user32.dll/IsThreadDesktopComposited.php
BOOL WINAPI IsThreadDesktopComposited();
BOOL WINAPI GetDpiForMonitorInternal(HMONITOR hmonitor, MONITOR_DPI_TYPE dpiType, UINT* dpiX, UINT* dpiY);
static void detectDisplays(FFDisplayServerResult* ds) {
DISPLAYCONFIG_PATH_INFO paths[128];
uint32_t pathCount = ARRAY_SIZE(paths);
DISPLAYCONFIG_MODE_INFO modes[256];
uint32_t modeCount = ARRAY_SIZE(modes);
if (QueryDisplayConfig(
QDC_ONLY_ACTIVE_PATHS,
&pathCount,
paths,
&modeCount,
modes,
NULL) == ERROR_SUCCESS) {
for (uint32_t i = 0; i < pathCount; ++i) {
const DISPLAYCONFIG_PATH_INFO* path = &paths[i];
const DISPLAYCONFIG_SOURCE_MODE* sourceMode = &modes[path->sourceInfo.modeInfoIdx].sourceMode;
FF_STRBUF_AUTO_DESTROY name = ffStrbufCreate();
uint32_t physicalWidth = 0, physicalHeight = 0;
DISPLAYCONFIG_TARGET_DEVICE_NAME targetName = {
.header = {
.type = DISPLAYCONFIG_DEVICE_INFO_GET_TARGET_NAME,
.size = sizeof(targetName),
.adapterId = path->targetInfo.adapterId,
.id = path->targetInfo.id,
},
};
FF_AUTO_FREE_ARG_BUFFER FFArgBuffer edid = {};
if (DisplayConfigGetDeviceInfo(&targetName.header) == ERROR_SUCCESS) {
wchar_t regPath[256] = L"SYSTEM\\CurrentControlSet\\Enum";
wchar_t* pRegPath = regPath + strlen("SYSTEM\\CurrentControlSet\\Enum");
wchar_t* pDevPath = targetName.monitorDevicePath + strlen("\\\\?");
while (*pDevPath && *pDevPath != L'{') {
if (*pDevPath == L'#') {
*pRegPath = L'\\';
} else {
*pRegPath = *pDevPath;
}
++pRegPath;
++pDevPath;
assert(pRegPath < regPath + ARRAY_SIZE(regPath) + strlen("Device Parameters"));
}
wcscpy(pRegPath, L"Device Parameters");
FF_AUTO_CLOSE_FD HANDLE hKey = NULL;
if (ffRegOpenKeyForRead(HKEY_LOCAL_MACHINE, regPath, &hKey, NULL) &&
ffRegReadData(hKey, L"EDID", &edid, NULL) &&
ffEdidIsValid(edid.data, edid.length)) {
ffEdidGetName(edid.data, &name);
ffEdidGetPhysicalSize(edid.data, &physicalWidth, &physicalHeight);
} else {
edid.length = 0;
if (targetName.flags.friendlyNameFromEdid) {
ffStrbufSetWS(&name, targetName.monitorFriendlyDeviceName);
} else {
ffStrbufSetWS(&name, targetName.monitorDevicePath);
ffStrbufSubstrAfterFirstC(&name, '#');
ffStrbufSubstrBeforeFirstC(&name, '#');
}
}
}
uint32_t width = sourceMode->width;
uint32_t height = sourceMode->height;
uint32_t rotation;
switch (path->targetInfo.rotation) {
case DISPLAYCONFIG_ROTATION_ROTATE90:
rotation = 90;
break;
case DISPLAYCONFIG_ROTATION_ROTATE180:
rotation = 180;
break;
case DISPLAYCONFIG_ROTATION_ROTATE270:
rotation = 270;
break;
default:
rotation = 0;
break;
}
DISPLAYCONFIG_TARGET_PREFERRED_MODE preferredMode = {
.header = {
.type = DISPLAYCONFIG_DEVICE_INFO_GET_TARGET_PREFERRED_MODE,
.size = sizeof(preferredMode),
.adapterId = path->targetInfo.adapterId,
.id = path->targetInfo.id,
}
};
double preferredRefreshRate = 0;
if (DisplayConfigGetDeviceInfo(&preferredMode.header) == ERROR_SUCCESS) {
DISPLAYCONFIG_RATIONAL freq = preferredMode.targetMode.targetVideoSignalInfo.vSyncFreq;
preferredRefreshRate = freq.Numerator / (double) freq.Denominator;
}
uint32_t systemDpi = 0;
HMONITOR hMonitor = MonitorFromPoint(*(POINT*) &sourceMode->position, MONITOR_DEFAULTTONULL);
if (hMonitor) {
UINT ignored;
GetDpiForMonitorInternal(hMonitor, MDT_EFFECTIVE_DPI, &systemDpi, &ignored);
}
if (systemDpi == 0) {
HDC hdc = GetDC(NULL);
systemDpi = (uint32_t) GetDeviceCaps(hdc, LOGPIXELSX);
if (systemDpi == 0) {
systemDpi = 96;
}
ReleaseDC(NULL, hdc);
}
if (path->targetInfo.rotation == DISPLAYCONFIG_ROTATION_ROTATE90 ||
path->targetInfo.rotation == DISPLAYCONFIG_ROTATION_ROTATE270) {
uint32_t temp = width;
width = height;
height = temp;
}
FFDisplayResult* display = ffdsAppendDisplay(ds,
width,
height,
path->targetInfo.refreshRate.Numerator / (double) path->targetInfo.refreshRate.Denominator,
systemDpi,
preferredMode.width,
preferredMode.height,
preferredRefreshRate,
rotation,
&name,
path->targetInfo.outputTechnology == DISPLAYCONFIG_OUTPUT_TECHNOLOGY_OTHER ? FF_DISPLAY_TYPE_UNKNOWN : path->targetInfo.outputTechnology == DISPLAYCONFIG_OUTPUT_TECHNOLOGY_INTERNAL || path->targetInfo.outputTechnology == DISPLAYCONFIG_OUTPUT_TECHNOLOGY_DISPLAYPORT_EMBEDDED || path->targetInfo.outputTechnology == DISPLAYCONFIG_OUTPUT_TECHNOLOGY_UDI_EMBEDDED ? FF_DISPLAY_TYPE_BUILTIN
: FF_DISPLAY_TYPE_EXTERNAL,
sourceMode->position.x == 0 && sourceMode->position.y == 0,
(uintptr_t) hMonitor,
physicalWidth,
physicalHeight,
"GDI");
if (display) {
DISPLAYCONFIG_GET_ADVANCED_COLOR_INFO_2 advColorInfo2 = {
.header = {
.type = DISPLAYCONFIG_DEVICE_INFO_GET_ADVANCED_COLOR_INFO_2,
.size = sizeof(advColorInfo2),
.adapterId = path->targetInfo.adapterId,
.id = path->targetInfo.id,
}
};
if (DisplayConfigGetDeviceInfo(&advColorInfo2.header) == ERROR_SUCCESS) {
if (advColorInfo2.highDynamicRangeUserEnabled) {
display->hdrStatus = FF_DISPLAY_HDR_STATUS_ENABLED;
} else if (advColorInfo2.highDynamicRangeSupported) {
display->hdrStatus = FF_DISPLAY_HDR_STATUS_SUPPORTED;
} else {
display->hdrStatus = FF_DISPLAY_HDR_STATUS_UNSUPPORTED;
}
display->bitDepth = (uint8_t) advColorInfo2.bitsPerColorChannel;
} else {
DISPLAYCONFIG_GET_ADVANCED_COLOR_INFO advColorInfo = {
.header = {
.type = DISPLAYCONFIG_DEVICE_INFO_GET_ADVANCED_COLOR_INFO,
.size = sizeof(advColorInfo),
.adapterId = path->targetInfo.adapterId,
.id = path->targetInfo.id,
}
};
if (DisplayConfigGetDeviceInfo(&advColorInfo.header) == ERROR_SUCCESS) {
if (advColorInfo.advancedColorEnabled) {
display->hdrStatus = FF_DISPLAY_HDR_STATUS_ENABLED;
} else if (advColorInfo.advancedColorSupported) {
display->hdrStatus = FF_DISPLAY_HDR_STATUS_SUPPORTED;
} else {
display->hdrStatus = FF_DISPLAY_HDR_STATUS_UNSUPPORTED;
}
display->bitDepth = (uint8_t) advColorInfo.bitsPerColorChannel;
} else {
display->hdrStatus = FF_DISPLAY_HDR_STATUS_UNKNOWN;
}
}
if (edid.length > 0) {
ffEdidGetSerialAndManufactureDate(edid.data, &display->serial, &display->manufactureYear, &display->manufactureWeek);
}
display->drrStatus = path->flags & DISPLAYCONFIG_PATH_BOOST_REFRESH_RATE ? FF_DISPLAY_DRR_STATUS_ENABLED : FF_DISPLAY_DRR_STATUS_DISABLED;
}
}
}
}
void ffConnectDisplayServerImpl(FFDisplayServerResult* ds) {
if (IsThreadDesktopComposited()) {
ffStrbufSetStatic(&ds->wmProcessName, "dwm.exe");
ffStrbufSetStatic(&ds->wmPrettyName, "Desktop Window Manager");
} else {
// `explorer.exe` only provides a subset of WM functions, as well as the taskbar and desktop icons.
// While a window itself is drawn by kernel (GDI). Killing `explorer.exe` won't affect how windows are displayed generally.
ffStrbufSetStatic(&ds->wmProcessName, "explorer.exe");
ffStrbufSetStatic(&ds->wmPrettyName, "Internal");
}
detectDisplays(ds);
}
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