Provide an easy way to include Webp images into your project.
Webp is a very optimized image format. It will produce smaller image size with almost the same quality as other compression format such as: ETC2, DXT5, ETC1, PVRTC. Below is some comparison between Webp and popular compression format in Unity
| 512x512 Image | Size in KB |
|---|---|
| Original | 480 |
| ETC1 4bits | 128 |
| ETC2 8bits | 256 |
| Dxt5 Crunched | 64 |
| PVRTC 2 bit | 64 |
| PVRTC 4 bit | 128 |
| Webp Lossless | 287 |
| Webp Lossy 80 | 23 |
| 1024x1024 Image | Size in KB |
|---|---|
| Original | 1800 |
| ETC1 4bits | 512 |
| ETC2 8bits | 1000 |
| Dxt5 Crunched | 183 |
| PVRTC 2 bit | 256 |
| PVRTC 4 bit | 512 |
| Webp Lossless | 1200 |
| Webp Lossy 80 | 113 |
When Webp images are read in Unity, the result is a full RGBA32 image in memory, therefore, webp is only suitable for scenes in your game where you have a bit of extra memory and performance. Another issue is that it does not integrate with Unity Atlas packer, so you will have to slice your texture manually. You can of course use an external texture packer to facilitate the slicing automatically, however, it's not recommended to apply webp to anything but a few large background textures.
The conversion from webp binary data to Unity textures is provided by the open-source project webp-unity3d. UBootstrap.Webp aims to provide wrapper components so that you can use seemlessly with UIImage, RawImage, Sprite, and MeshRenderer. In the case of UIImage, there's also a UV Rect property that you can use to slice the image, so there's little difference between UIImage and RawImage in the case of webp.
There are example usage of these components in Assets/Test/Test and Assets/Test/TestUI scenes.
To include UBootstrap.Webp into your project, you can use npm method of unity package management described here. After installing this package, there's one extra step: Adding --unsafe to Assets/smcr.rsp.
0.0.3
- Fix type issue that caused
DllNotFoundException: webp
0.0.2
- Bump version for
webp-unity3d v0.0.2
0.0.1
- Add
SpriteRendererWebp,UIImageWebp,UIRawImageWebp,MeshRendererWebp
