python - PIL: preview image without saving -


so working on application allows users edit images. i'm using pil , python. relevant code here: https://github.com/nit-dgp/uip/blob/master/uiplib/uipimage.py

what want user able preview images on gui without saving image. save , open, seem pretty intensive , want edits happen in real time, example there blur bar , want image blur in preview user slides bar. have partial implementation wish know if library provides such feature or can build less resource intensive (right save images , open in real time).

for eg: blur slider

self.slider = scale(self,                     orient=horizontal,                     from_=0, to=30,                     command=self._blur_helper,                     label="blur", showvalue=0)

the _blur_helper_method,

def _blur_helper(self, event):     """helper schedule blur_image task."""     if self._job:         self.appobj.root.after_cancel(self._job)     self._job = self.appobj.root.after(250, self.blur_image)

the blur image method:

def blur_image(self):     """apply blur chosen image."""     show = self.image.blur(self.slider.get())     self.show_image(show)

and image class:

import os  pil import image, imagefilter   class uipimage:  # pragma: no cover     """class holds image functions used edit it."""      def __init__(self, image_path):         """initialize class."""         self.image_path = image_path         self.original_path = image_path         self.image = image.open(image_path)         self.edited = false         self._blur = false         self.blur_radius = 0      def blur(self, radius):         """save blur pamaters returns blurred image."""         self.edited = true         self._blur = true         self._blur_radius = radius         return self.image.filter(imagefilter.gaussianblur(                                   radius=float(radius)))      def save(self):         """save image while applying parameters used edit it."""         if self.edited:             filename, ext = os.path.splitext(self.original_path)             self.image_path = os.path.join(filename + '_uip' + ext)             if self._blur:                 self.image = self.blur(self._blur_radius)         self.image.save(self.image_path)


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