Subsampling not supported for AVIF, TIFF, DNG (and maybe more) (Sketch)

[IacobIonut01]

Describe the bug

As described in the title, the subsampling feature does not work when using different image formats, for example the AVIF, TIFF, DNG and maybe more rich formats does not tile at all when zooming

12:40:00.933  D  Image info: ImageInfo(size=7602x2135, mimeType='image/avif')
12:40:00.933  D  Active tiles: []

Affected platforms

Select of the platforms below:

• Android

Affected components

Select of the components below:

• SketchAsyncZoomImage

Versions

• zoomimage version*: 1.1.0-beta01
• Kotlin version*: 2.0.20
• Compose version(s)* (Jetpack/Multiplatform): 1.7.2

Running Devices

• Google pixel 6; Android 15 ; arm64

Sample code

Use the SketchZoomAsyncImage and a media uri as source Example images: samples.zip

Reproduction steps

• Open Image
• Zoom
• See the blurriness

Expected behavior

• Open Image
• Zoom
• Observe full resolution zoomed spot

[panpf]

Received.

[panpf]

For AVIF format, decoding through BitmapFactory is supported since Android 12, but BitmapRegionDecoder, which relies on subsampling, still does not support avif format until the current Android 15

Until the latest Android 15 version, BitmapFactory and BitmapRegionDecoder do not support TIFF and DNG format images.

I am also actively looking for third-party libraries to support more image formats. If you also have suitable library recommendations, please let me know