Added custom image class
This commit is contained in:
Ace
parent
8a82a149af
commit
eb806526bd
246
inkycal/modules/inky_image.py
Normal file
246
inkycal/modules/inky_image.py
Normal file
@ -0,0 +1,246 @@
|
||||
#!/usr/bin/python3
|
||||
# -*- coding: utf-8 -*-
|
||||
|
||||
"""
|
||||
Custom image class for Inkycal Project
|
||||
Takes care of handling images. Made to be used by other modules to handle
|
||||
images.
|
||||
|
||||
Copyright by aceisace
|
||||
"""
|
||||
|
||||
from PIL import Image, ImageOps
|
||||
import requests
|
||||
import numpy
|
||||
import os
|
||||
import logging
|
||||
|
||||
filename = os.path.basename(__file__).split('.py')[0]
|
||||
logger = logging.getLogger(filename)
|
||||
|
||||
class Inkyimage:
|
||||
"""Inkyimage class
|
||||
|
||||
missing documentation, lazy devs :/
|
||||
"""
|
||||
|
||||
def __init__(self, image=None):
|
||||
"""Initialize Inkyimage module"""
|
||||
|
||||
# no image initially
|
||||
self.image = image
|
||||
|
||||
# give an OK message
|
||||
print(f'{filename} loaded')
|
||||
|
||||
def load(self, path):
|
||||
"""loads an image from a URL or filepath.
|
||||
|
||||
Args:
|
||||
- path:The full path or url of the image file
|
||||
e.g. `https://sample.com/logo.png` or `/home/pi/Downloads/nice_pic.png`
|
||||
|
||||
Raises:
|
||||
- FileNotFoundError: This Exception is raised when the file could not be
|
||||
found.
|
||||
- OSError: A OSError is raised when the URL doesn't point to the correct
|
||||
file-format, i.e. is not an image
|
||||
- TypeError: if the URLS doesn't start with htpp
|
||||
"""
|
||||
# Try to open the image if it exists and is an image file
|
||||
try:
|
||||
if path.startswith('http'):
|
||||
logger.debug('loading image from URL')
|
||||
image = Image.open(requests.get(path, stream=True).raw)
|
||||
else:
|
||||
logger.info('loading image from local path')
|
||||
image = Image.open(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.debug(f'width: {image.width}, height: {image.height}')
|
||||
|
||||
image.convert(mode='RGBA') #convert to a more suitable format
|
||||
self.image = image
|
||||
print('loaded Image')
|
||||
|
||||
def clear(self):
|
||||
"""Removes currently saved image if present"""
|
||||
if self.image:
|
||||
self.image = None
|
||||
print('cleared')
|
||||
|
||||
def _preview(self):
|
||||
"""Preview the image on gpicview (only works on Rapsbian with Desktop)"""
|
||||
if self._image_loaded():
|
||||
path = '/home/pi/Desktop/'
|
||||
self.image.save(path+'temp.png')
|
||||
os.system("gpicview "+path+'temp.png')
|
||||
os.system('rm '+path+'temp.png')
|
||||
|
||||
@staticmethod
|
||||
def preview(image):
|
||||
""""Previews an 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')
|
||||
|
||||
def _image_loaded(self):
|
||||
"""returns True if image was loaded"""
|
||||
if self.image:
|
||||
return True
|
||||
else:
|
||||
print('image not loaded')
|
||||
return False
|
||||
|
||||
def flip(self, angle):
|
||||
"""Flips the image by the given angle.
|
||||
|
||||
Args:
|
||||
- angle:->int. A multiple of 90, e.g. 90, 180, 270, 360.
|
||||
"""
|
||||
if self._image_loaded():
|
||||
|
||||
image = self.image
|
||||
if not angle % 90 == 0:
|
||||
print('Angle must be a multiple of 90')
|
||||
return
|
||||
|
||||
image = image.rotate(angle, expand = True)
|
||||
self.image = image
|
||||
print(f'flipped image by {angle} degrees')
|
||||
|
||||
def autoflip(self, layout):
|
||||
"""flips the image automatically to the given layout.
|
||||
|
||||
Args:
|
||||
- layout:-> str. Choose `horizontal` or `vertical`.
|
||||
|
||||
Checks the image's width and height.
|
||||
|
||||
In horizontal mode, the image is flipped if the image height is greater
|
||||
than the image width.
|
||||
|
||||
In vertical mode, the image is flipped if the image width is greater
|
||||
than the image height.
|
||||
"""
|
||||
if self._image_loaded():
|
||||
|
||||
image = self.image
|
||||
if layout == 'horizontal':
|
||||
if (image.height > image.width):
|
||||
print('image width greater than image height, flipping')
|
||||
image = image.rotate(90, expand=True)
|
||||
|
||||
elif layout == 'vertical':
|
||||
if (image.width > image.height):
|
||||
print('image width greater than image height, flipping')
|
||||
image = image.rotate(90, expand=True)
|
||||
else:
|
||||
print('layout not supported')
|
||||
return
|
||||
self.image = image
|
||||
|
||||
def remove_alpha(self):
|
||||
"""Removes transparency if image has transparency.
|
||||
|
||||
Checks if an image has an alpha band and replaces the transparency with
|
||||
white pixels.
|
||||
"""
|
||||
if self._image_loaded():
|
||||
image = self.image
|
||||
|
||||
if len(image.getbands()) == 4:
|
||||
print('has alpha')
|
||||
logger.debug('removing transparency')
|
||||
bg = Image.new('RGBA', (image.width, image.height), 'white')
|
||||
im = Image.alpha_composite(bg, image)
|
||||
|
||||
self.image.paste(im, (0,0))
|
||||
print('removed alpha')
|
||||
|
||||
def resize(self, width=None, height=None):
|
||||
"""Resize an image to desired width or height"""
|
||||
if self._image_loaded():
|
||||
|
||||
if width == None and height == None:
|
||||
print('no height of width specified')
|
||||
return
|
||||
|
||||
image = self.image
|
||||
|
||||
if width:
|
||||
initial_width = image.width
|
||||
wpercent = (width/float(image.width))
|
||||
hsize = int((float(image.height)*float(wpercent)))
|
||||
image = image.resize((width, hsize), Image.ANTIALIAS)
|
||||
logger.debug(f"resized image from {initial_width} to {image.width}")
|
||||
self.image = image
|
||||
|
||||
if height:
|
||||
initial_height = image.height
|
||||
hpercent = (height / float(image.height))
|
||||
wsize = int(float(image.width) * float(hpercent))
|
||||
image = image.resize((wsize, height), Image.ANTIALIAS)
|
||||
logger.debug(f"resized image from {initial_height} to {image.height}")
|
||||
self.image = image
|
||||
|
||||
def to_mono(self):
|
||||
"""Converts image to pure balck-white image (1-bit).
|
||||
|
||||
retrns 1-bit image
|
||||
|
||||
"""
|
||||
if self._image_loaded():
|
||||
image = self.image
|
||||
|
||||
image = image.convert('1', dither=True)
|
||||
return image
|
||||
|
||||
|
||||
def to_colour(self):
|
||||
"""Maps image colours to 3 colours.
|
||||
"""
|
||||
if self._image_loaded():
|
||||
image = self.image.convert('RGB')
|
||||
|
||||
# Create a simple palette
|
||||
pal = [255,255,255, 0,0,0, 255,0,0, 255,255,255]
|
||||
|
||||
# Map each pixel of the opened image to the Palette
|
||||
palette_im = Image.new('P', (3,1))
|
||||
palette_im.putpalette(pal * 64)
|
||||
quantized_im = image.quantize(palette=palette_im)
|
||||
quantized_im.convert('RGB')
|
||||
|
||||
# Create a buffer for coloured pixels
|
||||
buffer1 = numpy.array(quantized_im.convert('RGB'))
|
||||
r1,g1,b1 = buffer1[:, :, 0], buffer1[:, :, 1], buffer1[:, :, 2]
|
||||
|
||||
# Create a buffer for black pixels
|
||||
buffer2 = numpy.array(quantized_im.convert('RGB'))
|
||||
r2,g2,b2 = buffer2[:, :, 0], buffer2[:, :, 1], buffer2[:, :, 2]
|
||||
|
||||
# re-construct image from coloured-pixels buffer
|
||||
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)
|
||||
|
||||
# re-construct image from black pixels buffer
|
||||
buffer1[numpy.logical_and(r1 == 255, b1 == 0)] = [255,255,255]
|
||||
im_black = Image.fromarray(buffer1)
|
||||
|
||||
return im_black, im_colour
|
||||
|
||||
|
||||
if __name__ == '__main__':
|
||||
print(f'running {filename} in standalone/debug mode')
|
||||
|
||||
a = Inkyimage()
|
||||
a.load('https://pngimg.com/uploads/pokemon/pokemon_PNG148.png')
|
||||
Loading…
Reference in New Issue
Block a user