sim: Add configurable OLED aspect ratio

This can be used to fix aspect ratio stretching of badly configured
screens.

sim/fakes/_sim.py

@@ -29,6 +29,7 @@ bgpath = os.path.join(simpath, "background.png")
 background = pygame.image.load(bgpath)
 
 OLED_SIZE = int(os.environ["SIM_OLED_SIZE"])
+OLED_ASPECT = float(os.environ["SIM_OLED_ASPECT"])
 
 
 def path_replace(p):
@@ -517,9 +518,11 @@ class Simulation:
         center_x = screen_w // 2
         center_y = screen_h // 2
         if FULL_SCREEN:
-            off_x = center_x - (screen_h // 2)
+            off_x = center_x - (screen_h * OLED_ASPECT // 2)
             off_y = center_y - (screen_h // 2)
-            new = pygame.transform.scale(self._oled_surface, (screen_h, screen_h))
+            new = pygame.transform.scale(
+                self._oled_surface, (screen_h * OLED_ASPECT, screen_h)
+            )
             full.blit(new, (off_x, off_y))
         else:
             off_x = center_x - (OLED_SIZE // 2)

sim/run.py

@@ -163,6 +163,7 @@ def sim_main():
         help="Run the simulator as full-screen OLED display.",
     )
     parser.add_argument("--oled-size", dest="oled_size", default=240)
+    parser.add_argument("--oled-aspect", dest="oled_aspect", default=1)
     parser.add_argument(
         "override_app",
         nargs="?",
@@ -173,6 +174,7 @@ def sim_main():
 
     os.environ["SIM_FULL_SCREEN"] = "1" if args.full_screen else "0"
     os.environ["SIM_OLED_SIZE"] = str(args.oled_size)
+    os.environ["SIM_OLED_ASPECT"] = str(args.oled_aspect)
     import _sim
 
     _sim.SCREENSHOT = args.screenshot