Strange effect on display png images with transparent background.

When I display the images, they have a dark border around, but the issue only happen in iphone and ipad. I created the images with GIMP.

Is there any solution to solve this problem?

Partial screenshot form ipad

from kivy.app import App
from kivy.graphics import Color, Rectangle
from kivy.uix.gridlayout import GridLayout
from kivy.uix.image import Image

class ShowImage(GridLayout):
    def __init__(self, *args, **kwargs):
        super(ShowImage, self).__init__(**kwargs)

        self.size_hint = (1, 1)
        self.rows = 1
        self.cols = 3

        self.add_widget(Image(size_hint=(1/3., 1), source='img01.png'))
        self.add_widget(Image(size_hint=(1/3., 1), source='img02.png'))
        self.add_widget(Image(size_hint=(1/3., 1), source='img03.png'))

        self.rect = None
        with self.canvas.before:
            Color(1, 1, 1, 1, mode='rgba')
            self.rect = Rectangle(pos=self.pos, size=self.size)

        def update_pos(instance, pos):
            self.rect.pos = pos
        def update_size(instance, size):
            self.rect.size = size
        self.bind(pos=update_pos)
        self.bind(size=update_size)

class TestApp(App):
    def build(self):
        return ShowImage()

if __name__ == '__main__':
    TestApp().run()

[princeIta]

Thank you so much @tshirtman. it worked. You know when you said I should downscale the image I thought you meant I should reduce the size (dimensions of the image) programmatically By changing it’s width and height. i reduced the size of the image using a picture editing program and the image displays fine on the app. Thanks

Get Outlook for Androidhttps://aka.ms/ghei36

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From: Gabriel Pettier [e-mail] Sent: Monday, July 16, 2018 10:11:00 PM To: kivy/kivy Cc: princeIta; Mention Subject: Re: [kivy/kivy] Strange effect on display png images with transparent background. (#4463)

can you open a new issue about that, and put the image (or another showing the same issue) in it?

— You are receiving this because you were mentioned. Reply to this email directly, view it on GitHubhttps://github.com/kivy/kivy/issues/4463#issuecomment-405383322, or mute the threadhttps://github.com/notifications/unsubscribe-auth/AlfNZlt_evugS_Q7tZ8JU4l2y0Oz-1baks5uHQFkgaJpZM4JKNVr.

[mrhdias]

I think that i found the image: https://github.com/kivy/kivy/blob/master/kivy/data/images/image-loading.gif