Should fix Travis builds

radio/src/Makefile

@@ -393,8 +393,13 @@ endif
 
 IMG2LBM = -$(PYTHON) ../util/img2lbm.py
 BIN2LBM = -$(PYTHON) ../util/bin2lbm.py
-FONT2PNG = -$(PYTHON) ../util/font2png.py
+ifeq ($(OS), Windows_NT)
+  FONT2PNG = -$(PYTHON) ../util/font2png.py
+else
+  FONT2PNG = -xvfb-run --server-args="-screen 0 1024x768x24" $(PYTHON) ../util/font2png.py
+endif
 TRANSLATE = -$(PYTHON) ../util/translate.py
+
 VERSION = 2.2.0$(OPENTX_VERSION_SUFFIX)
 
 THIRDPARTY = thirdparty

radio/util/font2png.py

@@ -44,7 +44,9 @@ def createFontBitmap(filename, fontname, fontsize, fontbold, foreground, backgro
     font.setPixelSize(fontsize)
     font.setBold(fontbold)
     font.setHintingPreference(QtGui.QFont.PreferNoHinting)
+    font.setStyleStrategy(QtGui.QFont.PreferAntialias)
     metrics = QtGui.QFontMetrics(font)
+    
     width = getFontWidth(fontsize, metrics)
     top, bottom = getFontTopBottom(fontsize, metrics)
     extraImage = QtGui.QImage("fonts/extra_%dpx.png" % (fontsize+1))