Infinite looping zoom .gif generator in the browser
After a silly joke at work, I spent an evening implementing a Python script to generate "all the way down"-type animated gif images which endlessly zoom down onto some source image. I wanted this for a Slack emoji, but it'd be equally useful for Discord emoji and similar.
More specifically, design considerations were:
Avoid the pitfalls of other online generators which don't round properly. Depending whether the downscaled image had an odd or even number of pixels, the image would drift left and right through the animation.
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