Add initial python file.

Currently can take still images and display a viewfinder

picam.py

@@ -0,0 +1,91 @@
+import picamera
+import pygame
+import pygame_gui
+import time
+import io
+import os
+
+from datetime import datetime
+
+def setup_pygame():
+    pygame.init()
+    # Set the cursor to invisible. We use a transparent cursor for this as set_visible breaks the touch screen
+    pygame.mouse.set_cursor((8,8),(0,0),(0,0,0,0,0,0,0,0),(0,0,0,0,0,0,0,0))
+    screen = pygame.display.set_mode((0, 0), pygame.FULLSCREEN) # (0, 0) means same as display resolution
+    return screen
+
+def setup_camera(screen):
+    camera = picamera.PiCamera()
+    camera.rotation = 90
+    return camera
+
+def take_picture(camera, capture_resolution, directory):
+    now = datetime.now()
+    now_string = now.strftime("%d-%m-%Y %H-%M-%S")
+    print("Saving image to: \"./images/{0}.jpg\"".format(now_string))
+    camera.resolution = capture_resolution
+    camera.capture("./{0}/{1}.jpg".format(directory, now_string))
+
+def set_cam_resolution(camera, resolution, framerate):
+    camera.resolution = resolution
+    camera.framerate = framerate
+
+screen = setup_pygame()
+camera = setup_camera(screen)
+
+cam_viewfinder_resolution = (int(screen.get_width() / 2), int(screen.get_height() / 2))
+cam_capture_resolution = (camera.MAX_RESOLUTION.width, camera.MAX_RESOLUTION.height)
+cam_video_resolution = (1920, 1080)
+
+cam_viewfinder_framerate = 15
+cam_video_framerate = 30
+
+set_cam_resolution(camera, cam_viewfinder_resolution, cam_viewfinder_framerate)
+
+rgb = bytearray(camera.resolution[0] * camera.resolution[1] * 3)
+
+#pygame-gui
+gui_manager = pygame_gui.UIManager((screen.get_width(), screen.get_height()))
+clock = pygame.time.Clock()
+
+print(screen.get_width())
+print(screen.get_height())
+
+take_button = pygame_gui.elements.UIButton(relative_rect=pygame.Rect((720, 200), (80, 80)),
+                                             text='Take',
+                                             manager=gui_manager)
+
+loop = True
+while loop:
+    time_delta = clock.tick(60)/1000.0
+    for event in pygame.event.get():
+        if event.type == pygame.KEYDOWN:
+            if event.key == pygame.K_ESCAPE:
+                loop = False
+        elif event.type == pygame.QUIT:
+            loop = False
+        elif event.type == pygame.USEREVENT:
+            if event.user_type == pygame_gui.UI_BUTTON_PRESSED:
+                if event.ui_element == take_button:
+                    take_picture(camera, cam_capture_resolution, './images')
+                    reset_resolution(camera, cam_viewfinder_resolution, cam_viewfinder_framerate)
+        gui_manager.process_events(event)
+
+    gui_manager.update(time_delta)
+
+    stream = io.BytesIO()
+    camera.capture(stream, use_video_port=True, format='rgb')
+    stream.seek(0)
+    stream.readinto(rgb)
+    stream.close()
+    img = pygame.image.frombuffer(rgb[0:(camera.resolution[0] * camera.resolution[1] * 3)], camera.resolution, 'RGB')
+    img = pygame.transform.scale(img, (screen.get_width(), screen.get_height()))
+
+    if img:
+        screen.blit(img, (0, 0))
+
+    gui_manager.draw_ui(screen)
+    pygame.display.update()
+
+camera.close()
+pygame.display.quit()