first flipdot command

Author: brackendawson

flipdot/gen_string.py

@@ -0,0 +1,57 @@
+#!/usr/bin/env python2
+
+import socket, time
+from PIL import Image, ImageFont, ImageDraw
+import sys
+import fileinput
+
+UDPHOST="sr-flipdot.local"
+UDPPORT=2323
+
+FPS = 3
+INVERT=False
+
+IMG_SIZE = (120, 16)
+FONT_SIZE = 11
+FONT_OFFSET= (1, 2)
+
+C_BLACK = (0, 0, 0)
+C_WHITE = (255, 255, 255)
+
+sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+
+def list2byte(l):
+    byte = 0
+    i = 0
+    for i in range(8):
+        byte += 2**(7-i) if l[i] else 0
+    return byte
+
+def array2packet(a):
+    return str(bytearray([list2byte(a[i*8:i*8+8]) for i in range(len(a)/8)]))
+
+def str2array(s):
+    image = Image.new("RGBA", IMG_SIZE, C_BLACK)
+    draw = ImageDraw.Draw(image)
+    draw.fontmode = "1"         # No AA
+    #font = ImageFont.load_default()
+    font = ImageFont.truetype("/usr/share/fonts/truetype/ttf-dejavu/DejaVuSans-Bold.ttf", FONT_SIZE)
+
+    draw.text(FONT_OFFSET, s, font=font, fill=C_WHITE)
+
+    imgmap = []
+    for pixel in image.getdata():
+        r, g, b, a = pixel
+        if r == 255:
+            imgmap.append(0 if INVERT else 1)
+        else:
+            imgmap.append(1 if INVERT else 0)
+    return imgmap
+
+while True:
+    text = sys.stdin.readline().decode('utf-8')
+    if text == "":
+        break
+    sock.sendto(array2packet(str2array(text.strip())), (UDPHOST, UDPPORT))
+    time.sleep(1.0/FPS)
+

flipdot/scroll_text.py

@@ -0,0 +1,90 @@
+#!/usr/bin/env python2
+
+import socket, time
+from PIL import Image, ImageFont, ImageDraw
+import sys
+import fileinput
+
+UDPHOST="sr-flipdot.local"
+UDPPORT=2323
+
+FPS = 50
+STEPS = 2
+INVERT=False
+
+DISPLAY_SIZE = (120, 16)
+FONT_SIZE = 10
+FONT_OFFSET= (1, 0)
+
+C_BLACK = (0, 0, 0)
+C_WHITE = (255, 255, 255)
+
+sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+
+def list2byte(l):
+    byte = 0
+    i = 0
+    for i in range(8):
+        byte += 2**(7-i) if l[i] else 0
+    return byte
+
+def array2packet(a):
+    return str(bytearray([list2byte(a[i*8:i*8+8]) for i in range(len(a)/8)]))
+
+def str2array(s):
+    #font = ImageFont.load_default()
+    font = ImageFont.truetype("/usr/share/fonts/truetype/ttf-dejavu/DejaVuSans-Bold.ttf", FONT_SIZE)
+
+    img_width = font.getsize(s)[0]
+    image     = Image.new("RGBA", (img_width,DISPLAY_SIZE[1]), C_BLACK)
+    draw      = ImageDraw.Draw(image)
+    draw.fontmode = "1" # no AA
+
+    draw.text(FONT_OFFSET, s, font=font, fill=C_WHITE)
+
+    imgmap = []
+    for pixel in image.getdata():
+        r, g, b, a = pixel
+        if r == 255:
+            imgmap.append(0 if INVERT else 1)
+        else:
+            imgmap.append(1 if INVERT else 0)
+    return imgmap
+
+
+def scroll_text(imgmap):
+
+    display_width  = DISPLAY_SIZE[0]
+    display_heigth = DISPLAY_SIZE[1]
+
+    imgmap_width    = len(imgmap) / display_heigth
+    scrollimg_width = imgmap_width + 2*display_width
+
+    scroll_imgmap = [1 if INVERT else 0] * (scrollimg_width * display_heigth)
+    
+    # expand imgmap
+    for row in range(display_heigth):
+        for col in range(imgmap_width):
+            scroll_imgmap[display_width-STEPS + row*scrollimg_width + col] = imgmap[col+row*imgmap_width]
+
+
+    # scroll img
+    curr_frame = [0] * display_width * display_heigth
+    
+    for offset in range(0, scrollimg_width-display_width, STEPS):
+        for row in range(display_heigth):
+            for col in range(display_width):
+                    curr_frame[col+row*display_width] = scroll_imgmap[col+row*scrollimg_width + offset]
+        
+        sock.sendto(array2packet(curr_frame), (UDPHOST, UDPPORT))
+        #time.sleep(1.0/FPS)
+
+try:        
+    while True:
+        text = sys.stdin.readline().decode('utf-8')
+        if text == "":
+            break
+        scroll_text(str2array(text.strip()))
+except KeyboardInterrupt:
+    print("")
+    sys.exit(0)

print.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+if [ $(echo $4 | wc -c) -gt 17 ]; then
+  echo $4 | flipdot/scroll_text.py
+else
+  echo $4 | flipdot/gen_string.py
+fi
+if [ "$?" == "0" ]; then
+  echo "$1, flipping done"
+else
+  echo "$1, something flipped out."
+fi