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redwarp / gifdecoder

An implementation of a gif decoder written 100% in Kotlin, plus an associated Drawable for Android
Apache License 2.0
47 stars 6 forks source link
android-library decoder gif kotlin

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Gif Decoder

An implementation of a gif decoder written 100% in kotlin

This project contains several parts.

decoder

Maven Central

A simple jvm library written 100% in kotlin that handles the parsing of the gif format, headers, lzw decoder and so on.

decoder is available on mavenCentral()

implementation "app.redwarp.gif:decoder:x.y.z"

See decoder.

android-drawable

Maven Central

An implementation of an Android Drawable, using the decoder, as a simple way to display a gif in an Android app.

android-drawable is available on mavenCentral()

implementation "app.redwarp.gif:android-drawable:x.y.z"

See android-drawable.

License

The decoder and android-drawable library are both under an Apache 2.0 License.

You might notice a few classes in the project copyrighted to Google: they are the OG decoder copied from the bumptech/glide library, and are included in the project to do benchmarking and compare performance between the java implementation and the kotlin one.

They are not actually included in the two deliverables, decoder and android-drawable .

The bitmap.h in the giflzwdecoder folder is copyrighted to the Android Open Source Project, but is also not included in the deliverables: it's part of a currently failed attempt at making a native implementation of the decoder.

Android ndk + rust is not trivial, and that attempt is currently on hold.

Even though my first attempt at it kind of worked, it was naive and did come with a set of issues so I dropped it. I might get back to it in the future.