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Fix for image resizing algorithm. Was only resizing to square images.

This commit is contained in:
PySimpleGUI 2020-06-16 07:58:24 -04:00
parent ac6623b6e5
commit e3185a22ae
1 changed files with 16 additions and 20 deletions
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36
DemoPrograms/Demo_Graph_Elem_Image_Album.py
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@ -16,38 +16,34 @@ import os
Copyright 2020 PySimpleGUI.org Copyright 2020 PySimpleGUI.org
""" """
G_SIZE = (400,400) G_SIZE = (800,600)
def get_img_filename(f, resize=None): def get_img_filename(f, resize=None):
"""Generate image data using PIL """
Resizes an image file and returns the result as a byte string which can be used to update a PySimpleGUI Element
""" """
img = PIL.Image.open(f) img = PIL.Image.open(f)
cur_width, cur_height = img.size return resize_pil_image(img, resize)
if resize:
new_width, new_height = resize
if cur_width > cur_height:
new_height = int(new_height * cur_height/cur_width)
else:
new_width = int(new_width * cur_width/cur_height)
img = img.resize((new_width, new_height), PIL.Image.ANTIALIAS)
bio = io.BytesIO()
img.save(bio, format="PNG")
del img
return bio.getvalue()
def get_img_data(data, resize=None): def get_img_data(data, resize=None):
"""Generate PIL.Image data using PIL """Generate PIL.Image data using PIL
""" """
img = PIL.Image.open(io.BytesIO(base64.b64decode(data))) img = PIL.Image.open(io.BytesIO(base64.b64decode(data)))
return resize_pil_image(img, resize)
def resize_pil_image(img, resize=None):
"""
Resizes a PIL image to a new size or just converts to PNG as a byte string
:param img:
:param resize:
:return:
"""
cur_width, cur_height = img.size cur_width, cur_height = img.size
if resize: if resize:
new_width, new_height = resize new_width, new_height = resize
if cur_width > cur_height: scale = min(new_height/cur_height, new_width/cur_width)
new_height = int(new_height * cur_height/cur_width) img = img.resize((int(cur_width*scale), int(cur_height*scale)), PIL.Image.ANTIALIAS)
else:
new_width = int(new_width * cur_width/cur_height)
img = img.resize((new_width, new_height), PIL.Image.ANTIALIAS)
bio = io.BytesIO() bio = io.BytesIO()
img.save(bio, format="PNG") img.save(bio, format="PNG")
del img del img
@ -59,7 +55,7 @@ if not folder:
file_list = os.listdir(folder) file_list = os.listdir(folder)
fnames = [f for f in file_list if os.path.isfile( fnames = [f for f in file_list if os.path.isfile(
os.path.join(folder, f)) and f.lower().endswith((".png", ".jpg", "jpeg", ".tiff", ".bmp"))] os.path.join(folder, f)) and f.lower().endswith((".png", ".jpg", "jpeg", ".tiff", ".bmp", ".gif", ".ico"))]
num_files = len(fnames) num_files = len(fnames)
graph = sg.Graph(canvas_size=G_SIZE, graph_bottom_left=(0, 0), graph_top_right=G_SIZE, enable_events=True, key='-GRAPH-') graph = sg.Graph(canvas_size=G_SIZE, graph_bottom_left=(0, 0), graph_top_right=G_SIZE, enable_events=True, key='-GRAPH-')