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Display (Windows): supports dpi scale factor detection on Win 7

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This commit is contained in:
李通洲
2026-01-07 20:04:54 +08:00
parent 4d185e64ac
commit 9e49451340
1 changed files with 18 additions and 2 deletions
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src/detection/displayserver/displayserver_windows.c
+18 -2
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@@ -32,6 +32,13 @@ static void detectDisplays(FFDisplayServerResult* ds)
FF_LIST_AUTO_DESTROY monitors = ffListCreate(sizeof(FFMonitorInfo));
EnumDisplayMonitors(NULL, NULL, MonitorEnumProc, (LPARAM) &monitors);
#if FF_WIN7_COMPAT
HDC hdc = GetDC(NULL);
uint32_t systemDpi = (uint32_t) GetDeviceCaps(hdc, LOGPIXELSX);
if (systemDpi == 0) systemDpi = 96;
ReleaseDC(NULL, hdc);
#endif
DISPLAYCONFIG_PATH_INFO paths[128];
uint32_t pathCount = ARRAY_SIZE(paths);
DISPLAYCONFIG_MODE_INFO modes[256];
@@ -161,12 +168,21 @@ static void detectDisplays(FFDisplayServerResult* ds)
preferredRefreshRate = freq.Numerator / (double) freq.Denominator;
}
uint32_t scaledWidth = (uint32_t) (monitorInfo->info.rcMonitor.right - monitorInfo->info.rcMonitor.left);
uint32_t scaledHeight = (uint32_t) (monitorInfo->info.rcMonitor.bottom - monitorInfo->info.rcMonitor.top);
FFDisplayResult* display = ffdsAppendDisplay(ds,
width,
height,
path->targetInfo.refreshRate.Numerator / (double) path->targetInfo.refreshRate.Denominator,
(uint32_t) (monitorInfo->info.rcMonitor.right - monitorInfo->info.rcMonitor.left),
(uint32_t) (monitorInfo->info.rcMonitor.bottom - monitorInfo->info.rcMonitor.top),
#if FF_WIN7_COMPAT
// Windows 7 always reports scaled width as the real width, as I tested on VM with 200% scaling.
scaledWidth == width ? width * 96 / systemDpi : scaledWidth,
scaledHeight == height ? height * 96 / systemDpi : scaledHeight,
#else
scaledWidth,
scaledHeight,
#endif
preferredMode.width,
preferredMode.height,
preferredRefreshRate,