How to work with WebP?

1shevelov

I want to work with WebP images.

So I can use buffer = file_name.get_buffer(file_name.get_len()), where file_name is a webp file, and then Image.load_webp_from_buffer(buffer: PoolByteArray), right?

And vice versa I can use Image.get_data() to get a PoolByteArray and then File.store_buffer() to save this PoolByteArray. But will I receive a WebP image file as a result?

1shevelov

Seems that I can load webp image with simple Image.load(), but there is no simple Image.save_webp() method

TwistedTwigleg

I do not really have any experience with WebP images, but there might be someone who knows on one of the other Godot communities (Reddit, Facebook, Discord, etc) if no one on the forums knows. Another good place to go is to the devel channel on the IRC, as the main Godot developers are often there and they probably can help point you in the right direction for saving WebP images, assuming there is a way to do so in Godot.

Calinou

but there is no simple Image.save_webp() method

Saving WebP images at run-time isn't supported yet. Only the PNG and OpenEXR formats can be saved at run-time. (Still, you can load a WebP image at run-time and save it as PNG.)

1shevelov

@Calinou said: Saving WebP images at run-time isn't supported yet. Only the PNG and OpenEXR formats can be saved at run-time. (Still, you can load a WebP image at run-time and save it as PNG.)

Thank you very much for answering! Please comment the pipelines I wrote at the start:

Is it the right way to load WebP image?

buffer = file_name.get_buffer(file_name.get_len()), where file_name is a webp file, and then Image.load_webp_from_buffer(buffer: PoolByteArray)

And if that is right, what do I get if I reverse these operations? What if I take that Image object I've got from load_webp_from_buffer() convert it back to PoolByteArray with Image.get_data() method and then save to file with File.store_buffer() Why won't I receieve WebP image file again?

UPDATE: So I've conducted a test. Saving PNG with save_png() or save_png_to_buffer() -> store_buffer() yields exactly the same PNG file. Saving PNG or WebP file with get_data() -> store_buffer() yields unreadable files, as you'd expect saving binary data. ;⁾ So everything as @Calinou said, no wonders here.