dfi-led-matrix/printtext_dfi/FlipdotSender.py

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from PIL import Image, ImageDraw, ImageFont
import socket
import binascii
import io
import time
import re
import numpy as np
import PIL.ImageOps
class FlipdotSender(object):
'''
classdocs
'''
C_BLACK = 0
C_WHITE = 255
global threadrunning
threadrunning=False
lastimgmap = []
def __init__(self, udphost, udpport, img_size=(160,48), font_size=9, font_size_scroll=12,
font_offset1=(0,0), font_offset2=(0,8),
#font_family='/usr/share/fonts/gnu-free/FreeMono.ttf',
#font_family='/usr/share/fonts/truetype/dejavu/DejaVuSansMono.ttf',
font_family='freefont/FreeMono.ttf',
chars_per_line=11):
'''
Constructor
'''
self._udphost = udphost
if not type(udpport) is int or udpport > 65536:
raise TypeError('port has to be int and > 65536 !!')
self._udpport = udpport
self._img_size = img_size
self._font_size = font_size
self._font_size_scroll = font_size_scroll
self._font_offset1 = font_offset1
self._font_offset2 = font_offset2
self._font_family = font_family
self._chars_per_line = chars_per_line
self._sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
def stopAnimation(self):
global threadrunning
threadrunning=False #tried to stop a running animation
def _list2byte(self, l):
byte = 0
i = 0
for i in range(8):
byte += 2**(7-i) if l[i] else 0
return byte
def _array2packet(self, a):
return [self._list2byte(a[i*8:i*8+8]) for i in range(int(len(a)/8))]
'''
def _send(self, image): #old function, backup
imgmap = []
for pixel in image.getdata():
r, g, b, a = pixel
if r == FlipdotSender.C_WHITE:
imgmap.append(1)
else:
imgmap.append(0)
lastimgmap=imgmap
packet = self._array2packet(imgmap)
self._sock.sendto(bytes(packet), (self._udphost, self._udpport))'''
def _send(self, image,fadespeed=0,invert=False): #changes slowly 'fadespeed'-pixels at a time
global threadrunning
#if fadespeed=0 -> change instant.
#time to change= 1280/25*0.2
imgmap = []
for pixel in image.getdata():
r, g, b, a = pixel
if r >= 127:
if invert:
imgmap.append(0)
else:
imgmap.append(1)
else:
if invert:
imgmap.append(1)
else:
imgmap.append(0)
imgmaptmp=FlipdotSender.lastimgmap
if fadespeed>0:
threadrunning=True
#diff=np.sum(np.array(imgmaptmp) != np.array(imgmap)) #different pixels
pixelchangeind=np.arange(self._img_size[0]*self._img_size[1])
np.random.shuffle(pixelchangeind)
for _i,ind in enumerate(pixelchangeind):
if threadrunning==False:
break #stop this for
if ind<len(imgmaptmp): #imgmaptmp is not empty (normally at first run)
imgmaptmp[ind]=imgmap[ind]
if _i%fadespeed==0:
packet = self._array2packet(imgmaptmp)
self._sock.sendto(bytes(packet), (self._udphost, self._udpport))
time.sleep(0.2)
if threadrunning==True: #if animation hasnt been cancelled
self.sendPacket(imgmap) #send packet and save last-imagemap
threadrunning=False
else:
self.sendPacket(imgmap) #send packet and save last-imagemap
def sendPacket(self, imgmap):
packet = self._array2packet(imgmap)
self._sock.sendto(bytes(packet), (self._udphost, self._udpport))
FlipdotSender.lastimgmap=imgmap
def send_bytes(self, img):
imgmap = []
for pixel in img:
if pixel == "1":
imgmap.append(1)
else:
imgmap.append(0)
if len(img) < 1280:
imgmap = np.hstack((imgmap, np.zeros(1280-len(img), dtype=int)))
packet = self._array2packet(imgmap)
self._sock.sendto(bytes(packet), (self._udphost, self._udpport))
def send_text(self, text,fadespeed=0):
image = Image.new("RGBA", self._img_size, FlipdotSender.C_BLACK)
draw = ImageDraw.Draw(image)
draw.fontmode = "1" # No AA
font = ImageFont.truetype(self._font_family, self._font_size)
cut = self._chars_per_line
splitted_text = text.split("|")
draw.text(self._font_offset1, splitted_text[0], font=font, fill=FlipdotSender.C_WHITE)
if len(splitted_text)>1:
draw.text(self._font_offset2, splitted_text[1], font=font, fill=FlipdotSender.C_WHITE)
self._send(image,fadespeed)
def send_textFull(self, text,fadespeed=0):
image = Image.new("RGBA", self._img_size, FlipdotSender.C_BLACK)
draw = ImageDraw.Draw(image)
draw.fontmode = "1" # No AA
l=1000 #init very high
splitpoint=40 #very high
currentfontsize=12+1 #init with max font size
font = ImageFont.truetype(self._font_family, currentfontsize)
while(l>80): #while text too long and font not too small
if currentfontsize>8:
currentfontsize=currentfontsize-1 #reduce size and try if fits
else: #if fontsize too small, try cutting sentence (2 lines)
splitpoint=splitpoint-1
font = ImageFont.truetype(self._font_family, currentfontsize)
l=draw.textsize(text[0:splitpoint], font=font)[0]
print("Textlength="+str(l)+" split="+str(splitpoint))
if splitpoint==40: #not splitted
draw.text((0,int((16-currentfontsize)/2) ), text, font=font, fill=FlipdotSender.C_WHITE)
else:
draw.text((0,-1), text[0:splitpoint], font=font, fill=FlipdotSender.C_WHITE)
draw.text((0,-1+currentfontsize), text[splitpoint:], font=font, fill=FlipdotSender.C_WHITE)
self._send(image,fadespeed)
def send_marquee(self, str, speed=3):
global threadrunning
threadrunning=True
offset = self._img_size[0]
font = ImageFont.truetype(self._font_family, self._font_size_scroll)
while offset >= -font.getsize(str)[0]-speed and threadrunning==True:
image = Image.new("RGBA", self._img_size, FlipdotSender.C_BLACK)
draw = ImageDraw.Draw(image)
draw.fontmode = "1" # No AA
draw.text((offset,0), str, font=font, fill=FlipdotSender.C_WHITE)
self._send(image)
offset -= speed
time.sleep(0.15)
threadrunning=False
def send_img_from_filename(self, imgfilename,invert=False):
background = Image.new("RGBA", self._img_size, FlipdotSender.C_BLACK)
image = Image.open(imgfilename)
image = image.convert(mode='RGBA')
image = image.resize(self._img_size)
image.save('/tmp/send2.png', 'PNG')
background.paste(image, box=(0,0), mask=None)
background.save('/tmp/send.png', 'PNG')
self._send(background,0,invert)
def send_img(self, img):
background = Image.new("RGBA", self._img_size, FlipdotSender.C_BLACK)
stream = io.BytesIO(img)
image = Image.open(stream)
image = image.convert(mode='RGBA')
image = image.resize(self._img_size)
image.save('/tmp/send2.jpeg', 'JPEG')
background.paste(image, box=(0,0), mask=None)
background.save('/tmp/send.jpeg', 'JPEG')
self._send(background)