Initial MPong game commit

This demonstrates native machine code in .mpy files as documented
in https://docs.micropython.org/en/latest/develop/natmod.html

The idea is to make a simple Pong game to demonstrate input from
buttons and touchscreen and output to framebuffer and audio.

internal_filesystem/apps/com.micropythonos.mpong/META-INF/MANIFEST.JSON

@@ -0,0 +1,24 @@
+{
+"name": "mPong",
+"publisher": "MicroPythonOS",
+"short_description": "PingPong game",
+"long_description": "Demonstrates native machinecode in .mpy files on both AMD64 and ESP32",
+"icon_url": "https://apps.micropythonos.com/apps/com.micropythonos.mpong/icons/com.micropythonos.mpong_0.1.0_64x64.png",
+"download_url": "https://apps.micropythonos.com/apps/com.micropythonos.mpong/mpks/com.micropythonos.mpong_0.1.0.mpk",
+"fullname": "com.micropythonos.mpong",
+"version": "0.1.0",
+"category": "games",
+"activities": [
+    {
+      "entrypoint": "assets/mpong.py",
+      "classname": "MPong",
+      "intent_filters": [
+        {
+          "action": "main",
+          "category": "launcher"
+        }
+      ]
+    }
+  ]
+}
+

internal_filesystem/apps/com.micropythonos.mpong/assets/mpong.py

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+import lvgl as lv
+from mpos import Activity, DisplayMetrics, InputManager
+
+indev_error_x = 160
+indev_error_y = 120
+
+DARKPINK = lv.color_hex(0xEC048C)
+
+import sys
+if sys.platform == "esp32":
+    import mpong_esp32 as mpong
+else:
+    import mpong_amd64 as mpong
+
+class MPong(Activity):
+
+    hor_res = 0
+    ver_res = 0
+    layer = None
+    buffer = None
+
+    # Widgets:
+    screen = None
+    canvas = None
+
+    def onCreate(self):
+        self.screen = lv.obj()
+        self.canvas = lv.canvas(self.screen)
+        d = lv.display_get_default()
+        self.hor_res = d.get_horizontal_resolution()
+        self.ver_res = d.get_vertical_resolution()
+        self.canvas.set_size(self.hor_res, self.ver_res)
+        #self.canvas.set_style_bg_color(lv.color_white(), lv.PART.MAIN)
+        self.buffer = bytearray(self.hor_res * self.ver_res * 2)
+        self.canvas.set_buffer(self.buffer, self.hor_res, self.ver_res, lv.COLOR_FORMAT.NATIVE)
+        #self.canvas.fill_bg(lv.color_white(), lv.OPA.COVER)
+        self.canvas.add_flag(lv.obj.FLAG.CLICKABLE)
+        self.canvas.add_event_cb(self.touch_cb, lv.EVENT.ALL, None)
+        self.layer = lv.layer_t()
+        self.canvas.init_layer(self.layer)
+        self.setContentView(self.screen)
+
+    def onResume(self, screen):
+        mpong.init(self.buffer, self.hor_res, self.ver_res)
+        self.refresh_timer = lv.timer_create(self.run_mpong, 10, None)
+
+    def onPause(self, screen):
+        print("stopping it!")
+        if self.refresh_timer:
+            self.refresh_timer.delete()
+
+    def run_mpong(self, timer=None):
+        mpong.render()
+        self.canvas.invalidate() # force redraw
+
+    def touch_cb(self, event):
+        event_code=event.get_code()
+        if event_code not in [19,23,25,26,27,28,29,30,49]:
+            if event_code == lv.EVENT.PRESSING: # this is probably enough
+                x, y = InputManager.pointer_xy()
+                mpong.move_paddle(-10)
+                return