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Code Issues Releases Wiki Activity

Add animated profile picture support

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This commit is contained in:
Alexandre Iooss 2020-09-06 18:54:21 +02:00
parent 72c004cb56
commit 82924c999a
2 changed files with 36 additions and 12 deletions
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34
apps/member/forms.py
View File

@ -3,7 +3,7 @@
import io
from PIL import Image
from PIL import Image, ImageSequence
from django import forms
from django.conf import settings
from django.contrib.auth.forms import AuthenticationForm
@ -82,13 +82,19 @@ class ImageForm(forms.Form):
height = forms.FloatField(widget=forms.HiddenInput())
def clean(self):
"""Load image and crop"""
"""
Load image and crop
In the future, when Pillow will support APNG we will be able to
simplify this code to save only PNG/APNG.
"""
cleaned_data = super().clean()
# Image size is limited by Django DATA_UPLOAD_MAX_MEMORY_SIZE
image = cleaned_data.get('image')
if image:
# Let Pillow detect and load image
# If it is an animation, then there will be multiple frames
try:
im = Image.open(image)
except OSError:
@ -96,20 +102,30 @@ class ImageForm(forms.Form):
# but Pil is unable to load it
raise forms.ValidationError(_('This image cannot be loaded.'))
# Crop image
# Crop each frame
x = cleaned_data.get('x', 0)
y = cleaned_data.get('y', 0)
w = cleaned_data.get('width', 200)
h = cleaned_data.get('height', 200)
im = im.crop((x, y, x + w, y + h))
im = im.resize(
(settings.PIC_WIDTH, settings.PIC_RATIO * settings.PIC_WIDTH),
Image.ANTIALIAS,
)
frames = []
for frame in ImageSequence.Iterator(im):
frame = frame.crop((x, y, x + w, y + h))
frame = frame.resize(
(settings.PIC_WIDTH, settings.PIC_RATIO * settings.PIC_WIDTH),
Image.ANTIALIAS,
)
frames.append(frame)
# Save
om = frames.pop(0) # Get first frame
om.info = im.info # Copy metadata
image.file = io.BytesIO()
im.save(image.file, "PNG")
if len(frames) > 1:
# Save as GIF
om.save(image.file, "GIF", save_all=True, append_images=list(frames), loop=0)
else:
# Save as PNG
om.save(image.file, "PNG")
return cleaned_data

14
apps/member/views.py
View File

@ -271,9 +271,17 @@ class PictureUpdateView(ProtectQuerysetMixin, LoginRequiredMixin, FormMixin, Det
def form_valid(self, form):
"""Save image to note"""
image_field = form.cleaned_data['image']
image_field.name = "{}_pic.png".format(self.object.note.pk)
self.object.note.display_image = image_field
image = form.cleaned_data['image']
# Rename as a PNG or GIF
extension = image.name.split(".")[-1]
if extension == "gif":
image.name = "{}_pic.gif".format(self.object.note.pk)
else:
image.name = "{}_pic.png".format(self.object.note.pk)
# Save
self.object.note.display_image = image
self.object.note.save()
return super().form_valid(form)