220 lines
7.0 KiB
Python
220 lines
7.0 KiB
Python
#!/usr/bin/python3
|
|
# -*- coding: utf-8 -*-
|
|
"""
|
|
Inky-Calendar epaper functions
|
|
Copyright by aceisace
|
|
"""
|
|
from importlib import import_module
|
|
from PIL import Image
|
|
|
|
from inkycal.custom import top_level
|
|
import glob
|
|
|
|
class Display:
|
|
"""Display class for inkycal
|
|
|
|
Creates an instance of the driver for the selected E-Paper model and allows
|
|
rendering images and calibrating the E-Paper display
|
|
|
|
args:
|
|
- epaper_model: The name of your E-Paper model.
|
|
|
|
|
|
"""
|
|
|
|
def __init__(self, epaper_model):
|
|
"""Load the drivers for this epaper model"""
|
|
|
|
if 'colour' in epaper_model:
|
|
self.supports_colour = True
|
|
else:
|
|
self.supports_colour = False
|
|
|
|
try:
|
|
driver_path = f'inkycal.display.drivers.{epaper_model}'
|
|
driver = import_module(driver_path)
|
|
self._epaper = driver.EPD()
|
|
self.model_name = epaper_model
|
|
|
|
except ImportError:
|
|
raise Exception('This module is not supported. Check your spellings?')
|
|
|
|
except FileNotFoundError:
|
|
raise Exception('SPI could not be found. Please check if SPI is enabled')
|
|
|
|
def render(self, im_black, im_colour = None):
|
|
"""Renders an image on the selected E-Paper display.
|
|
|
|
Initlializes the E-Paper display, sends image data and executes command
|
|
to update the display.
|
|
|
|
Args:
|
|
- im_black: The image for the black-pixels. Anything in this image that is
|
|
black is rendered as black on the display. This is required and ideally
|
|
should be a black-white image.
|
|
|
|
- im_colour: For E-Paper displays supporting colour, a separate image,
|
|
ideally black-white is required for the coloured pixels. Anything that is
|
|
black in this image will show up as either red/yellow.
|
|
|
|
Rendering an image for black-white E-Paper displays:
|
|
|
|
>>> sample_image = PIL.Image.open('path/to/file.png')
|
|
>>> display = Display('my_black_white_display')
|
|
>>> display.render(sample_image)
|
|
|
|
|
|
Rendering black-white on coloured E-Paper displays:
|
|
|
|
>>> sample_image = PIL.Image.open('path/to/file.png')
|
|
>>> display = Display('my_coloured_display')
|
|
>>> display.render(sample_image, sample_image)
|
|
|
|
|
|
Rendering coloured image where 2 images are available:
|
|
|
|
>>> black_image = PIL.Image.open('path/to/file.png') # black pixels
|
|
>>> colour_image = PIL.Image.open('path/to/file.png') # coloured pixels
|
|
>>> display = Display('my_coloured_display')
|
|
>>> display.render(black_image, colour_image)
|
|
"""
|
|
|
|
epaper = self._epaper
|
|
|
|
if self.supports_colour == False:
|
|
print('Initialising..', end = '')
|
|
epaper.init()
|
|
print('Updating display......', end = '')
|
|
epaper.display(epaper.getbuffer(im_black))
|
|
print('Done')
|
|
|
|
elif self.supports_colour == True:
|
|
if not im_colour:
|
|
raise Exception('im_colour is required for coloured epaper displays')
|
|
print('Initialising..', end = '')
|
|
epaper.init()
|
|
print('Updating display......', end = '')
|
|
epaper.display(epaper.getbuffer(im_black), epaper.getbuffer(im_colour))
|
|
print('Done')
|
|
|
|
print('Sending E-Paper to deep sleep...', end = '')
|
|
epaper.sleep()
|
|
print('Done')
|
|
|
|
def calibrate(self, cycles=3):
|
|
"""Calibrates the display to retain crisp colours
|
|
|
|
Flushes the selected display several times with it's supported colours,
|
|
removing any previous effects of ghosting.
|
|
|
|
Args:
|
|
- cycles: -> int. The number of times to flush the display with it's
|
|
supported colours.
|
|
|
|
It's recommended to calibrate the display after every 6 display updates
|
|
for best results. For black-white only displays, calibration is less
|
|
critical, but not calibrating regularly results in grey-ish text.
|
|
|
|
Please note that calibration takes a while to complete. 3 cycles may
|
|
take 10 mins on black-white E-Papers while it takes 20 minutes on coloured
|
|
E-Paper displays.
|
|
"""
|
|
|
|
epaper = self._epaper
|
|
epaper.init()
|
|
|
|
display_size = self.get_display_size(self.model_name)
|
|
|
|
white = Image.new('1', display_size, 'white')
|
|
black = Image.new('1', display_size, 'black')
|
|
|
|
print('----------Started calibration of ePaper display----------')
|
|
if self.supports_colour == True:
|
|
for _ in range(cycles):
|
|
print('Calibrating...', end= ' ')
|
|
print('black...', end= ' ')
|
|
epaper.display(epaper.getbuffer(black), epaper.getbuffer(white))
|
|
print('colour...', end = ' ')
|
|
epaper.display(epaper.getbuffer(white), epaper.getbuffer(black))
|
|
print('white...')
|
|
epaper.display(epaper.getbuffer(white), epaper.getbuffer(white))
|
|
print(f'Cycle {_+1} of {cycles} complete')
|
|
|
|
if self.supports_colour == False:
|
|
for _ in range(cycles):
|
|
print('Calibrating...', end= ' ')
|
|
print('black...', end = ' ')
|
|
epaper.display(epaper.getbuffer(black))
|
|
print('white...')
|
|
epaper.display(epaper.getbuffer(white)),
|
|
print(f'Cycle {_+1} of {cycles} complete')
|
|
|
|
print('-----------Calibration complete----------')
|
|
epaper.sleep()
|
|
|
|
|
|
@classmethod
|
|
def get_display_size(cls, model_name):
|
|
"""Returns the size of the display as a tuple -> (width, height)
|
|
|
|
Looks inside drivers folder for the given model name, then returns it's
|
|
size.
|
|
|
|
Args:
|
|
- model_name: str -> The name of the E-Paper display to get it's size.
|
|
|
|
Returns:
|
|
(width, height) ->tuple, showing the size of the display
|
|
|
|
You can use this function directly without creating the Display class:
|
|
|
|
>>> Display.get_display_size('model_name')
|
|
"""
|
|
if not isinstance(model_name, str):
|
|
print('model_name should be a string')
|
|
return
|
|
else:
|
|
driver_files = top_level+'/inkycal/display/drivers/*.py'
|
|
drivers = glob.glob(driver_files)
|
|
drivers = [i.split('/')[-1].split('.')[0] for i in drivers]
|
|
drivers.remove('__init__')
|
|
drivers.remove('epdconfig')
|
|
if model_name not in drivers:
|
|
print('This model name was not found. Please double check your spellings')
|
|
return
|
|
else:
|
|
with open(top_level+'/inkycal/display/drivers/'+model_name+'.py') as file:
|
|
for line in file:
|
|
if 'EPD_WIDTH=' in line.replace(" ", ""):
|
|
width = int(line.rstrip().replace(" ", "").split('=')[-1])
|
|
if 'EPD_HEIGHT=' in line.replace(" ", ""):
|
|
height = int(line.rstrip().replace(" ", "").split('=')[-1])
|
|
return width, height
|
|
|
|
@classmethod
|
|
def get_display_names(cls):
|
|
"""Prints all supported E-Paper models.
|
|
|
|
Fetches all filenames in driver folder and prints them on the console.
|
|
|
|
Returns:
|
|
Printed version of all supported Displays.
|
|
|
|
Use one of the models to intilialize the Display class in order to gain
|
|
access to the E-Paper.
|
|
|
|
You can use this function directly without creating the Display class:
|
|
|
|
>>> Display.get_display_names()
|
|
"""
|
|
driver_files = top_level+'/inkycal/display/drivers/*.py'
|
|
drivers = glob.glob(driver_files)
|
|
drivers = [i.split('/')[-1].split('.')[0] for i in drivers]
|
|
drivers.remove('__init__')
|
|
drivers.remove('epdconfig')
|
|
print(*drivers, sep='\n')
|
|
|
|
if __name__ == '__main__':
|
|
print("Running Display class in standalone mode")
|
|
|