Adapted Inkycal_image
By using a helper class, this module could be simplified greatly
This commit is contained in:
parent
6d2c289e76
commit
3d4e24eee1
@ -9,55 +9,46 @@ Copyright by aceisace
|
||||
from inkycal.modules.template import inkycal_module
|
||||
from inkycal.custom import *
|
||||
|
||||
from PIL import ImageOps
|
||||
import requests
|
||||
import numpy
|
||||
from inkycal.modules.inky_image import Inkyimage as Images
|
||||
|
||||
filename = os.path.basename(__file__).split('.py')[0]
|
||||
logger = logging.getLogger(filename)
|
||||
|
||||
class Inkyimage(inkycal_module):
|
||||
"""Image class
|
||||
display an image from a given path or URL
|
||||
"""Displays an image from URL or local path
|
||||
"""
|
||||
|
||||
name = "Inykcal Image - show an image from a URL or local path"
|
||||
|
||||
requires = {
|
||||
'path': {
|
||||
"label":"Please enter the full path of the image file (local or URL)",
|
||||
}
|
||||
|
||||
"path":{
|
||||
"label":"Path to a local folder, e.g. /home/pi/Desktop/images. "
|
||||
"Only PNG and JPG/JPEG images are used for the slideshow."
|
||||
},
|
||||
|
||||
}
|
||||
"use_colour": {
|
||||
"label":"Does the display support colour?",
|
||||
"options": [True, False]
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
optional = {
|
||||
|
||||
"autoflip":{
|
||||
"label":"Should the image be flipped automatically?",
|
||||
"options": [True, False]
|
||||
},
|
||||
|
||||
'rotation':{
|
||||
"label":"Specify the angle to rotate the image. Default is 0",
|
||||
"options": [0, 90, 180, 270, 360, "auto"],
|
||||
"default":0,
|
||||
},
|
||||
|
||||
'layout':{
|
||||
"label":"How should the image be displayed on the display? Default is auto",
|
||||
"options": ['fill', 'center', 'fit', 'auto'],
|
||||
"default": "auto"
|
||||
},
|
||||
|
||||
'colours':{
|
||||
"label":"Specify the colours of your panel. Choose between bw (black and white), bwr (black, white and red) or bwy (black, white and yellow)",
|
||||
"options": ['bw', 'bwr', 'bwy'],
|
||||
"default": "bw"
|
||||
"orientation":{
|
||||
"label": "Please select the desired orientation",
|
||||
"options": ["vertical", "horizontal"]
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
|
||||
# TODO: thorough testing and code cleanup
|
||||
# TODO: presentation mode (cycle through images in folder)
|
||||
|
||||
def __init__(self, config):
|
||||
"""Initialize inkycal_rss module"""
|
||||
"""Initialize module"""
|
||||
|
||||
super().__init__(config)
|
||||
|
||||
@ -66,257 +57,56 @@ class Inkyimage(inkycal_module):
|
||||
# required parameters
|
||||
for param in self.requires:
|
||||
if not param in config:
|
||||
raise Exception('config is missing {}'.format(param))
|
||||
raise Exception(f'config is missing {param}')
|
||||
|
||||
# optional parameters
|
||||
self.image_path = self.config['path']
|
||||
|
||||
self.rotation = self.config['rotation']
|
||||
self.layout = self.config['layout']
|
||||
self.colours = self.config['colours']
|
||||
self.path = config['path']
|
||||
self.use_colour = config['use_colour']
|
||||
self.autoflip = config['autoflip']
|
||||
self.orientation = config['orientation']
|
||||
|
||||
# give an OK message
|
||||
print('{0} loaded'.format(self.name))
|
||||
print(f'{filename} loaded')
|
||||
|
||||
def _validate(self):
|
||||
"""Validate module-specific parameters"""
|
||||
|
||||
# Validate image_path
|
||||
if not isinstance(self.image_path, str):
|
||||
print(
|
||||
'image_path has to be a string: "URL1" or "/home/pi/Desktop/im.png"')
|
||||
|
||||
# Validate layout
|
||||
if not isinstance(self.layout, str):
|
||||
print('layout has to be a string')
|
||||
|
||||
def generate_image(self):
|
||||
"""Generate image for this module"""
|
||||
|
||||
# Define new image size with respect to padding
|
||||
im_width = self.width
|
||||
im_height = self.height
|
||||
im_width = int(self.width - (2 * self.padding_left))
|
||||
im_height = int(self.height - (2 * self.padding_top))
|
||||
im_size = im_width, im_height
|
||||
logger.info('image size: {} x {} px'.format(im_width, im_height))
|
||||
logger.info('image path: {}'.format(self.image_path))
|
||||
logger.info('colors: {}'.format(self.colours))
|
||||
|
||||
# Try to open the image if it exists and is an image file
|
||||
try:
|
||||
if self.image_path.startswith('http'):
|
||||
logger.debug('identified url')
|
||||
self.image = Image.open(requests.get(self.image_path, stream=True).raw)
|
||||
else:
|
||||
logger.info('identified local path')
|
||||
self.image = Image.open(self.image_path)
|
||||
except FileNotFoundError:
|
||||
raise ('Your file could not be found. Please check the filepath')
|
||||
except OSError:
|
||||
raise ('Please check if the path points to an image file.')
|
||||
logger.info(f'Image size: {im_size}')
|
||||
|
||||
logger.debug(('image-width:', self.image.width))
|
||||
logger.debug(('image-height:', self.image.height))
|
||||
# initialize custom image class
|
||||
im = Images()
|
||||
|
||||
# Create an image for black pixels and one for coloured pixels
|
||||
|
||||
im_black = Image.new('RGB', size = im_size, color = 'white')
|
||||
im_colour = Image.new('RGB', size = im_size, color = 'white')
|
||||
# use the image at the first index
|
||||
im.load(self.path)
|
||||
|
||||
# do the required operations
|
||||
self._remove_alpha()
|
||||
self._to_layout()
|
||||
black, colour = self._map_colours(self.colours)
|
||||
# Remove background if present
|
||||
im.remove_alpha()
|
||||
|
||||
# paste the images on the canvas
|
||||
im_black.paste(black, (self.x, self.y))
|
||||
im_colour.paste(colour, (self.x, self.y))
|
||||
# if autoflip was enabled, flip the image
|
||||
if self.autoflip == True:
|
||||
im.autoflip(self.orientation)
|
||||
|
||||
# Save images of black and colour channel in image-folder
|
||||
im_black.save(images+self.name+'.png', 'PNG')
|
||||
im_colour.save(images+self.name+'_colour.png', 'PNG')
|
||||
# resize the image so it can fit on the epaper
|
||||
im.resize( width=im_width, height=im_height )
|
||||
|
||||
# convert images according to given settings
|
||||
if self.use_colour == False:
|
||||
im_black = im.to_mono()
|
||||
im_colour = Image.new('RGB', size = im_black.size, color = 'white')
|
||||
else:
|
||||
im_black, im_colour = im.to_colour()
|
||||
|
||||
# with the images now send, clear the current image
|
||||
im.clear()
|
||||
|
||||
# return images
|
||||
return black, colour
|
||||
|
||||
def _rotate(self, angle=None):
|
||||
"""Rotate the image to a given angle
|
||||
angle must be one of :[0, 90, 180, 270, 360, 'auto']
|
||||
"""
|
||||
im = self.image
|
||||
if angle == None:
|
||||
angle = self.rotation
|
||||
|
||||
# Check if angle is supported
|
||||
# if angle not in self._allowed_rotation:
|
||||
# print('invalid angle provided, setting to fallback: 0 deg')
|
||||
# angle = 0
|
||||
|
||||
# Autoflip the image if angle == 'auto'
|
||||
if angle == 'auto':
|
||||
if (im.width > self.height) and (im.width < self.height):
|
||||
print('display vertical, image horizontal -> flipping image')
|
||||
image = im.rotate(90, expand=True)
|
||||
if (im.width < self.height) and (im.width > self.height):
|
||||
print('display horizontal, image vertical -> flipping image')
|
||||
image = im.rotate(90, expand=True)
|
||||
# if not auto, flip to specified angle
|
||||
else:
|
||||
image = im.rotate(angle, expand = True)
|
||||
self.image = image
|
||||
|
||||
def _fit_width(self, width=None):
|
||||
"""Resize an image to desired width"""
|
||||
im = self.image
|
||||
if width == None: width = self.width
|
||||
|
||||
logger.debug(('resizing width from', im.width, 'to'))
|
||||
wpercent = (width/float(im.width))
|
||||
hsize = int((float(im.height)*float(wpercent)))
|
||||
image = im.resize((width, hsize), Image.ANTIALIAS)
|
||||
logger.debug(image.width)
|
||||
self.image = image
|
||||
|
||||
def _fit_height(self, height=None):
|
||||
"""Resize an image to desired height"""
|
||||
im = self.image
|
||||
if height == None: height = self.height
|
||||
|
||||
logger.debug(('resizing height from', im.height, 'to'))
|
||||
hpercent = (height / float(im.height))
|
||||
wsize = int(float(im.width) * float(hpercent))
|
||||
image = im.resize((wsize, height), Image.ANTIALIAS)
|
||||
logger.debug(image.height)
|
||||
self.image = image
|
||||
|
||||
def _to_layout(self, mode=None):
|
||||
"""Adjust the image to suit the layout
|
||||
mode can be center, fit or fill"""
|
||||
|
||||
im = self.image
|
||||
if mode == None: mode = self.layout
|
||||
|
||||
# if mode not in self._allowed_layout:
|
||||
# print('{} is not supported. Should be one of {}'.format(
|
||||
# mode, self._allowed_layout))
|
||||
# print('setting layout to fallback: centre')
|
||||
# mode = 'center'
|
||||
|
||||
# If mode is center, just center the image
|
||||
if mode == 'center':
|
||||
pass
|
||||
|
||||
# if mode is fit, adjust height of the image while keeping ascept-ratio
|
||||
if mode == 'fit':
|
||||
self._fit_height()
|
||||
|
||||
# if mode is fill, enlargen or shrink the image to fit width
|
||||
if mode == 'fill':
|
||||
self._fit_width()
|
||||
|
||||
# in auto mode, flip image automatically and fit both height and width
|
||||
if mode == 'auto':
|
||||
|
||||
# Check if width is bigger than height and rotate by 90 deg if true
|
||||
if im.width > im.height:
|
||||
self._rotate(90)
|
||||
|
||||
# fit both height and width
|
||||
self._fit_height()
|
||||
self._fit_width()
|
||||
|
||||
if self.image.width > self.width:
|
||||
x = int( (self.image.width - self.width) / 2)
|
||||
else:
|
||||
x = int( (self.width - self.image.width) / 2)
|
||||
|
||||
if self.image.height > self.height:
|
||||
y = int( (self.image.height - self.height) / 2)
|
||||
else:
|
||||
y = int( (self.height - self.image.height) / 2)
|
||||
|
||||
self.x, self.y = x, y
|
||||
|
||||
def _remove_alpha(self):
|
||||
im = self.image
|
||||
|
||||
if len(im.getbands()) == 4:
|
||||
logger.debug('removing transparency')
|
||||
bg = Image.new('RGBA', (im.width, im.height), 'white')
|
||||
im = Image.alpha_composite(bg, im)
|
||||
self.image.paste(im, (0,0))
|
||||
|
||||
def _map_colours(self, colours = None):
|
||||
"""Map image colours to display-supported colours """
|
||||
im = self.image.convert('RGB')
|
||||
|
||||
if colours == 'bw':
|
||||
|
||||
# For black-white images, use monochrome dithering
|
||||
im_black = im.convert('1', dither=True)
|
||||
im_colour = None
|
||||
|
||||
elif colours == 'bwr':
|
||||
# For black-white-red images, create corresponding palette
|
||||
pal = [255,255,255, 0,0,0, 255,0,0, 255,255,255]
|
||||
|
||||
elif colours == 'bwy':
|
||||
# For black-white-yellow images, create corresponding palette"""
|
||||
pal = [255,255,255, 0,0,0, 255,255,0, 255,255,255]
|
||||
else:
|
||||
logger.info('Unrecognized colors: {}, falling back to black and white'.format(colours))
|
||||
# Fallback to black-white images, use monochrome dithering
|
||||
im_black = im.convert('1', dither=True)
|
||||
im_colour = None
|
||||
|
||||
# Map each pixel of the opened image to the Palette
|
||||
if colours == 'bwr' or colours == 'bwy':
|
||||
palette_im = Image.new('P', (3,1))
|
||||
palette_im.putpalette(pal * 64)
|
||||
quantized_im = im.quantize(palette=palette_im)
|
||||
quantized_im.convert('RGB')
|
||||
|
||||
# Create buffer for coloured pixels
|
||||
buffer1 = numpy.array(quantized_im.convert('RGB'))
|
||||
r1,g1,b1 = buffer1[:, :, 0], buffer1[:, :, 1], buffer1[:, :, 2]
|
||||
|
||||
# Create buffer for black pixels
|
||||
buffer2 = numpy.array(quantized_im.convert('RGB'))
|
||||
r2,g2,b2 = buffer2[:, :, 0], buffer2[:, :, 1], buffer2[:, :, 2]
|
||||
|
||||
if colours == 'bwr':
|
||||
# Create image for only red pixels
|
||||
buffer2[numpy.logical_and(r2 == 0, b2 == 0)] = [255,255,255] # black->white
|
||||
buffer2[numpy.logical_and(r2 == 255, b2 == 0)] = [0,0,0] #red->black
|
||||
im_colour = Image.fromarray(buffer2)
|
||||
|
||||
# Create image for only black pixels
|
||||
buffer1[numpy.logical_and(r1 == 255, b1 == 0)] = [255,255,255]
|
||||
im_black = Image.fromarray(buffer1)
|
||||
|
||||
if colours == 'bwy':
|
||||
# Create image for only yellow pixels
|
||||
buffer2[numpy.logical_and(r2 == 0, b2 == 0)] = [255,255,255] # black->white
|
||||
buffer2[numpy.logical_and(g2 == 255, b2 == 0)] = [0,0,0] #yellow -> black
|
||||
im_colour = Image.fromarray(buffer2)
|
||||
|
||||
# Create image for only black pixels
|
||||
buffer1[numpy.logical_and(g1 == 255, b1 == 0)] = [255,255,255]
|
||||
im_black = Image.fromarray(buffer1)
|
||||
|
||||
return im_black, im_colour
|
||||
|
||||
@staticmethod
|
||||
def save(image, path):
|
||||
im = self.image
|
||||
im.save(path, 'PNG')
|
||||
|
||||
@staticmethod
|
||||
def _show(image):
|
||||
"""Preview the image on gpicview (only works on Rapsbian with Desktop)"""
|
||||
path = '/home/pi/Desktop/'
|
||||
image.save(path+'temp.png')
|
||||
os.system("gpicview "+path+'temp.png')
|
||||
os.system('rm '+path+'temp.png')
|
||||
|
||||
if __name__ == '__main__':
|
||||
print('running {0} in standalone/debug mode'.format(filename))
|
||||
print(f'running {filename} in standalone/debug mode')
|
||||
|
Loading…
Reference in New Issue
Block a user