B4A Library [B4X] WebP images

Cross platform library that loads the new WebP format images.

Android natively supports this format so the regular LoadBitmap methods will also work.

B4i - If you are using a local builder then download the frameworks and add them to the builder: https://storage.googleapis.com/down...eases/webp/libwebp-1.1.0-ios-framework.tar.gz
Implementation is based on @Brandsum code: https://www.b4x.com/android/forum/threads/who-can-help-me-to-create-b4i-library.110896/#post-694480

B4J - Based on: https://github.com/zakgof/webp4j (Apache 2.0 license)
Download the additional jars.
Note that it is a Windows only library.
It will show a warning message in the logs when the first image is loaded. Ignore it.
(SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder")
If you are using the built-in packager then add this line:

#CustomBuildAction: After Packager, %WINDIR%\System32\robocopy.exe, ..\Objects\b4xlibs\Files temp\build\bin\ webp.dll

Usage instructions:

Dim WebP1 As WebP
WebP1.Initialize
ImageView1.SetBitmap(WebP1.LoadWebP(File.ReadBytes(File.DirAssets, "1.webp")))

Updates:
1.01 - Fixes an issue with B4J and the standalone packager.

 

[ADeveloper]

I hope this tutorial can help beginners to use Webp format and this wonderful library (b4a and b4j):

 

[Ferdari]

Hi @Erel. i tested the lib and the normal ImageView.bitmap=LoadBitmap() in B4A, none of the two plays an animated WebP, is there any instruction that im missing?

I mean if WebP is natively supported by Android it should play an animated webp by default. it does in apps ive seen on the store.

 

[Erel]

This library, as well as Android native support, is only for static WebP images.

 

[Ferdari]

Thanks @Erel, i tried to create a wrapper lib for playing animated webp but can't download the dependencies on Eclipse

GitHub - penfeizhou/APNG4Android: Android animation support for APNG & Animated WebP & Gif & Animated AVIF, High performance

Android animation support for APNG & Animated WebP & Gif & Animated AVIF, High performance - penfeizhou/APNG4Android

github.com

This seems a very good lib, can you do for playing animated webp?

 

[Pendrush]

i tried to create a wrapper lib for playing animated webp but can't download the dependencies on Eclipse

Compiled lib (aar) you can download here:

Maven Repository: com.github.penfeizhou.android.animation

mvnrepository.com

 

[Erel]

Please start a new thread for any discussion not related to this specific cross platform library.

 

[TelKel81]

Using Google's cwebp encoder, and then loading the image with this library, I get this kind of alpha issue no matter what switch I use for encoding.

 

[Erel]

Which platform?

 

[TelKel81]

B4J. The alpha channel seems incorrect (inverted + unknown issue).

 

[Erel]

No solution here. Sorry. It looks like a feature that isn't supported by the underlying Java SDK.

 

[Erel]

1.01 - Fixes an issue with B4J and the standalone packager.