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June 4, 2024 02:31
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setHighDPIAware()
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| #ifndef DPI_ENUMS_DECLARED | |
| typedef enum PROCESS_DPI_AWARENESS { | |
| PROCESS_DPI_UNAWARE = 0, | |
| PROCESS_SYSTEM_DPI_AWARE = 1, | |
| PROCESS_PER_MONITOR_DPI_AWARE = 2 | |
| } PROCESS_DPI_AWARENESS; | |
| #ifndef _DPI_AWARENESS_CONTEXTS_ | |
| typedef enum DPI_AWARENESS_CONTEXT { | |
| DPI_AWARENESS_INVALID, | |
| DPI_AWARENESS_UNAWARE, | |
| DPI_AWARENESS_SYSTEM_AWARE, | |
| DPI_AWARENESS_PER_MONITOR_AWARE | |
| } DPI_AWARENESS_CONTEXT; | |
| #endif | |
| #define DPI_AWARENESS_CONTEXT_UNAWARE ((DPI_AWARENESS_CONTEXT)-1) | |
| #define DPI_AWARENESS_CONTEXT_SYSTEM_AWARE ((DPI_AWARENESS_CONTEXT)-2) | |
| #define DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE ((DPI_AWARENESS_CONTEXT)-3) | |
| #define DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2 ((DPI_AWARENESS_CONTEXT)-4) | |
| #define DPI_AWARENESS_CONTEXT_UNAWARE_GDISCALED ((DPI_AWARENESS_CONTEXT)-5) | |
| #define DPI_ENUMS_DECLARED | |
| #endif // (DPI_ENUMS_DECLARED) | |
| typedef WINUSERAPI BOOL(WINAPI *pSetProcessDpiAwareness)(PROCESS_DPI_AWARENESS value); | |
| typedef WINUSERAPI BOOL(WINAPI *pSetProcessDPIAware)(); | |
| typedef WINUSERAPI BOOL(WINAPI *pSetThreadDpiAwarenessContext)(DPI_AWARENESS_CONTEXT value); | |
| typedef WINUSERAPI BOOL(WINAPI *pSetProcessDpiAwarenessContext)(DPI_AWARENESS_CONTEXT value); | |
| bool setHighDPIAwareWin10() | |
| { | |
| // This fixes the issue where if you change the OS DPI scale while logged in, the title | |
| // bar is the wrong size. | |
| HMODULE lib = LoadLibrary("User32.dll"); | |
| if (!lib) { | |
| return false; | |
| } | |
| bool ret = false; | |
| // Try Win10 build 1703+ method | |
| pSetProcessDpiAwarenessContext pfnSetProc = (pSetProcessDpiAwarenessContext)GetProcAddress(lib, "SetProcessDpiAwarenessContext"); | |
| if (pfnSetProc) { | |
| ret = (NULL != pfnSetProc(DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2)); | |
| // printf("Win10 1703 HighDPI SetProcessDpiAwarenessContext() success=%d\n", ret); | |
| } | |
| if (!ret) { | |
| // Try Win10 build 1607+ method | |
| // Older method, has problems on buggy NVIDIA drivers | |
| pSetThreadDpiAwarenessContext pfnSet = (pSetThreadDpiAwarenessContext)GetProcAddress(lib, "SetThreadDpiAwarenessContext"); | |
| if (pfnSet) { | |
| ret = (NULL != pfnSet(DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2)); | |
| // printf("Win10 1607 HighDPI SetThreadDpiAwarenessContext() success=%d\n", ret); | |
| } | |
| } | |
| FreeLibrary(lib); | |
| return ret; | |
| } | |
| static bool setHighDPIAwareWin81() | |
| { | |
| HMODULE shcore = LoadLibrary("Shcore.dll"); | |
| if (!shcore) { | |
| printf("Shcore.dll failed to load\n"); | |
| return false; | |
| } | |
| pSetProcessDpiAwareness pfnSetProcessDpiAwareness = (pSetProcessDpiAwareness)GetProcAddress(shcore, "SetProcessDpiAwareness"); | |
| bool ret = false; | |
| if (pfnSetProcessDpiAwareness) { | |
| // Note: on Win8, this is returning a bool, not an hresult, to this check is backwards? | |
| ret = (S_OK == pfnSetProcessDpiAwareness(PROCESS_PER_MONITOR_DPI_AWARE)); | |
| // printf("Win81 HighDPI SetProcessDpiAwareness() success=%d\n", ret); | |
| } | |
| FreeLibrary(shcore); | |
| return ret; | |
| } | |
| void setHighDPIAware() | |
| { | |
| static bool doneonce = false; | |
| if (doneonce) | |
| return; | |
| doneonce = true; | |
| if (setHighDPIAwareWin10()) { | |
| return; | |
| } | |
| if (setHighDPIAwareWin81()) { | |
| return; | |
| } | |
| HMODULE user32 = LoadLibrary("user32.dll"); | |
| if (!user32) | |
| return; | |
| pSetProcessDPIAware pfnSetProcessDPIAware = (pSetProcessDPIAware)GetProcAddress(user32, "SetProcessDPIAware"); | |
| bool ret = false; | |
| if (pfnSetProcessDPIAware) { | |
| ret = !!pfnSetProcessDPIAware(); | |
| // printf("HighDPI SetProcessDPIAware() success=%d\n", ret); | |
| } | |
| FreeLibrary(user32); | |
| return; | |
| } |
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