Force fontconfig to look at the correct path for fonts.conf on windows

(cherry picked from commit 208d146a03)

common/paths.cpp

@@ -434,6 +434,17 @@ wxString PATHS::GetOSXKicadDataDir()
 
 
 #ifdef __WXWINDOWS__
+wxString PATHS::GetWindowsFontConfigDir()
+{
+    wxFileName fn;
+    fn.AssignDir( getWindowsKiCadRoot() );
+    fn.AppendDir( wxS( "etc" ) );
+    fn.AppendDir( wxS( "fonts" ) );
+
+    return fn.GetPathWithSep();
+}
+
+
 wxString PATHS::getWindowsKiCadRoot()
 {
     wxFileName root( Pgm().GetExecutablePath() +  wxT( "/../" ) );

common/pgm_base.cpp

@@ -479,6 +479,13 @@ bool PGM_BASE::InitPgm( bool aHeadless, bool aSkipPyInit, bool aIsUnitTest )
     SetLanguagePath();
     SetDefaultLanguage( tmp );
 
+#ifdef _MSC_VER
+    // We need to set this because the internal fontconfig logic
+    // seems to search relative to the dll rather the other logic it
+    // has to look for the /etc folder above the dll
+    wxSetEnv( "FONTCONFIG_PATH", PATHS::GetWindowsFontConfigDir() );
+#endif
+
     m_settings_manager = std::make_unique<SETTINGS_MANAGER>( aHeadless );
 
     // Our unit test mocks break if we continue

include/paths.h

@@ -170,6 +170,13 @@ public:
     static wxString GetOSXKicadDataDir();
 #endif
 
+#ifdef __WXWINDOWS__
+    /**
+     * @return The macOS specific bundle data directory for KiCad
+     */
+    static wxString GetWindowsFontConfigDir();
+#endif
+
 private:
     // we are a static helper
     PATHS() {}