win32_SetProcessDpiAware.c

//
// Created by kumar on 2016/03/29.
//

#include "win32_SetProcessDpiAware.h"

#include <Windows.h>

#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;
#endif

typedef BOOL (WINAPI * SETPROCESSDPIAWARE_T)(void);
typedef HRESULT (WINAPI * SETPROCESSDPIAWARENESS_T)(PROCESS_DPI_AWARENESS);

bool win32_SetProcessDpiAware(void) {
    HMODULE shcore = LoadLibraryA("Shcore.dll");
    SETPROCESSDPIAWARENESS_T SetProcessDpiAwareness = NULL;
    if (shcore) {
        SetProcessDpiAwareness = (SETPROCESSDPIAWARENESS_T) GetProcAddress(shcore, "SetProcessDpiAwareness");
    }
    HMODULE user32 = LoadLibraryA("User32.dll");
    SETPROCESSDPIAWARE_T SetProcessDPIAware = NULL;
    if (user32) {
        SetProcessDPIAware = (SETPROCESSDPIAWARE_T) GetProcAddress(user32, "SetProcessDPIAware");
    }

    bool ret = false;
    if (SetProcessDpiAwareness) {
        ret = SetProcessDpiAwareness(PROCESS_PER_MONITOR_DPI_AWARE) == S_OK;
    } else if (SetProcessDPIAware) {
        ret = SetProcessDPIAware() != 0;
    }

    if (user32) {
        FreeLibrary(user32);
    }
    if (shcore) {
        FreeLibrary(shcore);
    }
    return ret;
}