first pass at the device-independent drawing system, including the Python

representation of a device context

src/Makefile

@@ -2,7 +2,7 @@ BUILDUTILS=../buildutils
 RESOURCES=../resources
 SPLASHSCREEN=splash-vmwcblk.png
 
-OBJS=main.o sysinput.o ep_init.o ep_upiwin.o ep_backlight.o ep_msg.o ep_upiwin_tmp.o ep_util.o \
+OBJS=main.o sysinput.o ep_init.o ep_upiwin.o ep_backlight.o ep_msg.o ep_devctxt.o ep_upiwin_tmp.o ep_util.o \
      fbinit.o rect.o gfxobj.o devctxt.o dc_screen.o fontengine.o fbprimitive.o \
      log.o gpio.o msg_queue.o time_func.o config.o splash.o
 LIBS=-lpython3.7m -lcrypt -lfreetype -lbcm2835 -lpthread -ldl -lutil -lm