Get platform-specific font locations

font_locations.cpp

#if defined(_WIN32) || defined(_WIN64) // Windows
# include <shlobj.h>
#endif

#include <string>
#include <vector>
#include <filesystem>

static std::vector<std::wstring> GetStandardFontsLocations()
{
    std::vector<std::wstring> result;
#if defined(_WIN32) || defined(_WIN64) // Windows
    // Get standard fonts location via system call
    // this API will require Shell32.dll, but we're getting it by using Qt by default
    WCHAR szPath[MAX_PATH];
    ::SHGetFolderPathW(NULL, CSIDL_FONTS, NULL, SHGFP_TYPE_DEFAULT, szPath);
    result.push_back(szPath);
#elif defined(__APPLE__) && defined(__MACH__) // Mac OS X
    result.push_back(L"/System/Library/Fonts");
    result.push_back(L"/Library/Fonts");
    result.push_back(L"~/Library/Fonts");
    result.push_back(L"/Network/Library/Fonts");
#elif defined(__unix__) || defined(__unix) // Linux
    result.push_back(L"/usr/share/fonts");
    result.push_back(L"/usr/local/share/fonts");
    result.push_back(L"~/.fonts");
#else
# error "Unknown target platform to get fonts location"
#endif
    return result;
}