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sense_edit.py
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sense_edit.py
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"""
Sense HAT pixel art editor
No command line options
Save - appends edited image to a gallery json file in the current directory.
"""
import sys
import os
import time
import logging
import json
from sense_hat import SenseHat, ACTION_PRESSED, ACTION_HELD, ACTION_RELEASED
black = (0, 0, 0)
white = (255, 255, 255)
red = (255, 0, 0)
yellow = (255, 255, 0)
green = (0, 255, 0)
blue = (0, 0, 255)
#pink = (255, 105, 180)
#dark_grey = (64, 64, 64)
#grey = (128, 128, 128)
#light_grey = (192, 192, 192)
nothing = (0,0,0)
new = (192, 192, 192) #light_grey
save = (128, 128, 128) #grey
load = (64, 64, 64) #dark_grey
im = []
imMenu = [new, save, load, black, white, red, yellow, green, blue]
gallery = []
x = 7
y = 3
mode = 'menu' #edit', 'menu', 'show'
newCol = white
menuOffset = 0
gallery_depth = None
lot = None
flash_stop = False
s = SenseHat()
def display(im, mode):
pixels = []
if mode == 'edit':
# fill pixels with the image
pixels = im
elif mode == 'menu':
# image we are editing on the left and menu on the right
# ignore first n columns of image where n is width of menu
for idx in range(0, 8):
#print(idx)
#print(im[idx * 8 + 1 : idx * 8 + 7], [imMenu[idx]])
pixels.extend(im[idx * 8 + 1 : idx * 8 + 8])
pixels.extend([imMenu[idx]])
#print(pixels)
elif mode == 'show':
# menu on the left and image from gallery on the right
for idx in range(0, 8):
#print(idx)
#print(im[idx * 8 + 1 : idx * 8 + 7], [imMenu[idx]])
pixels.extend([imMenu[idx]])
pixels.extend(im[idx * 8 : idx * 8 + 7])
#print(pixels)
#print(mode, x, y, newCol)
# display the pixels
s.set_pixels(pixels)
def flash(cx, cy):
global flash_stop
if mode != 'show':
col = s.get_pixel(cx, cy)
if mode == 'edit':
#print(col, newCol)
if int(col[0] / 16) == int(newCol[0] / 16) and int(col[1] / 16) == int(newCol[1] / 16) and int(col[2] / 16) == int(newCol[2] / 16):
# colours the same so show inverted
#print(cx, cy, (255 - col[0], 255 - col[1], 255 - col[2]))
if not flash_stop:
s.set_pixel(cx, cy, (255 - col[0], 255 - col[1], 255 - col[2]))
else:
if not flash_stop:
s.set_pixel(cx, cy, newCol)
elif mode == 'menu':
if not flash_stop:
s.set_pixel(cx, cy, black)
time.sleep(0.2)
# reset colour
if not flash_stop:
s.set_pixel(cx, cy, col)
time.sleep(0.2)
#print(mode, cx, cy, newCol)
flash_stop = False
def load_gallery():
global gallery, gallery_depth
#print('load gallery')
gallery = []
gallery_depth = 0
if not os.access("gallery.json", os.R_OK):
return False
with open("gallery.json", "r", encoding='utf-8') as gallery_file:
#print('load json')
gallery = json.load(gallery_file)
#print('gallery: ', gallery)
#print('len: ', len(gallery))
if len(gallery) == 0:
return False
else:
gallery_depth = len(gallery)
if len(gallery) == 64:
# there are 64 itmes in the list
# but is this just one image
if len(gallery[0]) == 3: #check for RGB tuple
# first item in the gallery is a pixel
gallery_depth = 1
return True
def append_gallery(imGal):
global gallery, gallery_depth
load_gallery()
#print('add image to gallery')
gallery.append(imGal)
#print('write whole gallery')
with open("gallery.json", "w", encoding='utf-8') as gallery_file:
json.dump(gallery, gallery_file)
gallery_depth = gallery_depth + 1
def fade():
s.low_light = True
def bright():
s.low_light = False
def acc_neg_count(a):
return (1 if a['x'] < 0 else 0) + (1 if a['y'] < 0 else 0) + (1 if a['z'] < 0 else 0)
# call back functions for sensehat button
# down and up just change the Y
# left and right can also change the mode
def s_down(event):
global y, lot
#print('down')
#print(event.direction, event.action)
if event.action != ACTION_RELEASED:
if mode == 'show':
#print(mode, lot, gallery_depth)
lot = (lot + 1) % gallery_depth
imGal = gallery[lot]
display(imGal, mode)
else:
#if mode == 'edit':
# s.set_pixel(x, y, im[x + y * 8])
#elif mode == 'menu':
# s.set_pixel(x, y, imMenu[y])
if y < 7:
y = y + 1
#print(mode, x, y, newCol)
def s_up(event):
global y, lot
#print('up')
#print(event.action)
if event.action != ACTION_RELEASED:
if mode == 'show':
#print(mode, lot, gallery_depth)
lot = ((lot - 1) + gallery_depth) % gallery_depth
imGal = gallery[lot]
display(imGal, mode)
else:
#if mode == 'edit':
# s.set_pixel(x, y, im[x + y * 8])
#elif mode == 'menu':
# s.set_pixel(x, y, imMenu[y])
if y > 0:
y = y - 1
#print(mode, x, y, newCol)
def s_left(event):
global x, mode
#print('left')
#print(event.action)
if event.action != ACTION_RELEASED:
if mode == 'menu':
mode = 'edit'
flash_stop = True
display(im, mode)
elif mode == 'edit':
#s.set_pixel(x, y, im[x + y * 8])
if x > 0:
x = x - 1
elif mode == 'show':
# leave the show without loading
mode = 'menu'
display(im, mode)
#print(mode, x, y, newCol)
def s_right(event):
global x, mode
#print('right')
#print(event.action)
if event.action != ACTION_RELEASED:
if x == 7:
if mode == 'edit':
mode = 'menu'
flash_stop = True
display(im, mode)
## elif mode == 'menu':
## mode = 'show'
## imGal = [nothing] * 64
## load_gallery()
## if len(gallery) == 0:
## imGal = [nothing] * 64
## else
## imGal = gallery[lot]
## display(imGal, mode)
## elif mode == 'show':
## pass
else:
s.set_pixel(x, y, im[x + y * 8])
x = x + 1
#print(mode, x, y, newCol)
def s_middle(event):
global newCol, im, mode, lot
#print('middle')
#print(event.action)
if event.action != ACTION_RELEASED:
if mode == 'edit':
#print('paint', x, y, newCol)
im[x + y * 8] = newCol
s.set_pixel(x, y, newCol)
elif mode == 'menu':
if y == 0: #new
#print('new')
im = [nothing] * 64
display(im, mode)
elif y == 1: #save
#print('save')
#print(im)
append_gallery(im)
s.show_letter('+', text_colour = [0, 255, 0])
time.sleep(1)
#else:
# s.show_letter('X', text_colour = [255, 0, 0])
display(im, mode)
elif y == 2: #load
#print('load')
if load_gallery():
if gallery_depth == 1:
# only one image in the gallery
lot = 0
imGal = gallery
else: # show first picture
lot = 0
imGal = gallery[0]
mode = 'show'
#print(mode, imGal)
flash_stop = True
display(imGal, mode)
elif y > 2:
newCol = imMenu[y]
elif mode == 'show':
mode = 'menu'
if gallery_depth == 1:
# only one image in the gallery
im = gallery
else: # load picture of #lot
im = gallery[lot]
display(im, mode)
#print(mode, x, y, newCol)
def s_any(event):
#print('any')
#print(event.direction, event.action)
#print(mode, x, y, newCol)
pass
def main():
global im
h_old = int(s.get_humidity())
an_old = acc_neg_count(s.get_accelerometer_raw())
fade()
im = [nothing] * 64
display(im, mode)
#print(mode, x, y, newCol)
# set up call back functions
s.stick.direction_down = s_down
s.stick.direction_left = s_left
s.stick.direction_right = s_right
s.stick.direction_up = s_up
s.stick.direction_middle = s_middle
s.stick.direction_any = s_any
while True:
# flash the current pixel
flash(x, y)
h = int(s.get_humidity()) # Take humidity reading
if h > (h_old + 3): # If humidity has increased...
#print('smelly breath', h_old, h)
fade()
else:
h_old = h
# check only for large movements
# by comparing sign of movement from accelerometer
an = acc_neg_count(s.get_accelerometer_raw())
if an != an_old:
#print('shuffle bottom', an_old, an)
bright()
an = an_old
try:
main()
except KeyboardInterrupt:
pass
finally:
if not s is None:
s.clear()