Add python font rendering and an example clock

python/clock.py

+#!/usr/bin/python
+
+import font_client
+
+from datetime import datetime
+
+import dateutil.tz
+
+while True:
+  #font_client.draw(datetime.now().isoformat(), points=30)
+  font_client.draw(datetime.now(dateutil.tz.tzlocal()).isoformat(), points=25)
+

python/font_client.py

+#!/usr/bin/python
+
+import sys, client
+
+import pygame
+pygame.init()
+
+screen = pygame.Surface((client.WIDTH, client.HEIGHT), depth=8)
+
+def send(screen):
+    w = screen.get_width()
+    h = screen.get_height()
+    pxarray = pygame.PixelArray(screen)
+    pixels = []
+    for y in range(h):
+        for x in range(w):
+            pixels.append(pxarray[x][y])
+    del pxarray
+    client.blit(0, 0, w, h, pixels)
+
+prev_mx = None
+font = None
+
+def draw(text, mark=None, points=None):
+    global prev_mx, font
+    points = points if points else 35 if mark else 60
+    font = pygame.font.SysFont("DejaVu Sans Mono", points, bold=True)
+    count = len(text)
+    text = font.render(text, True, (255, 255, 255), (0, 0, 0))
+    screen.set_palette(text.get_palette())
+    screen.fill((0, 0, 0))
+    w = text.get_width()
+    h = text.get_height()
+    x = (client.WIDTH-w)/2
+    y = (client.HEIGHT-h)/2
+    if mark:
+        cw = w/count
+        mx = x+cw*(mark+0.5)
+        if not mx == prev_mx:
+            for size in range(240, 5, -15):
+                pygame.draw.line(screen, 255,
+                        (mx, 0), 
+                        (mx, client.HEIGHT-1),
+                        size)
+                send(screen)
+                pygame.draw.line(screen, 0,
+                        (mx, 0), 
+                        (mx, client.HEIGHT-1),
+                        size)
+            prev_mx = mx
+        pygame.draw.line(screen, 255,
+                (mx, 0), 
+                (mx, client.HEIGHT-1),
+                5)
+    screen.blit(text, (x, y))
+
+    send(screen)
+
+if __name__=="__main__":
+    if len(sys.argv) >= 3:
+        text = sys.argv[2].decode('utf-8')
+    else:
+        text = "Hello World!"
+    if len(sys.argv) >= 4:
+        mark = int(sys.argv[3])
+    else:
+        mark = None
+
+    draw(text, mark)