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Adapted Inkycal_image

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By using a helper class, this module could be simplified greatly
This commit is contained in:
Ace
2020-11-29 23:45:17 +01:00
parent 6d2c289e76
commit 3d4e24eee1
1 changed files with 54 additions and 264 deletions
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314
inkycal/modules/inkycal_image.py
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@@ -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 = {
'rotation':{
"label":"Specify the angle to rotate the image. Default is 0",
"options": [0, 90, 180, 270, 360, "auto"],
"default":0,
"autoflip":{
"label":"Should the image be flipped automatically?",
"options": [True, False]
},
'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)
logger.info(f'Image size: {im_size}')
# initialize custom image class
im = Images()
# use the image at the first index
im.load(self.path)
# Remove background if present
im.remove_alpha()
# if autoflip was enabled, flip the image
if self.autoflip == True:
im.autoflip(self.orientation)
# 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:
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.')
im_black, im_colour = im.to_colour()
logger.debug(('image-width:', self.image.width))
logger.debug(('image-height:', self.image.height))
# 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')
# do the required operations
self._remove_alpha()
self._to_layout()
black, colour = self._map_colours(self.colours)
# paste the images on the canvas
im_black.paste(black, (self.x, self.y))
im_colour.paste(colour, (self.x, self.y))
# 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')
# 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')