Issue decoding webp file on Kindle 3 (Keyboard)

[naleo]

Device

Kindle

KOReader version

2025.05

Model and firmware version

Kindle Keyboard (3) (3.4.3)

Issue description

I have written a plugin that fetches an image, and renders it (book cover). When running the plugin on a Kindle Keyboard, I get an issue about an Illegal Instruction

In my plugin, I am using the RenderImage:scaleBlitBuffer(image, width, height, true) command.

Steps to reproduce

1. Go to '...'
2. Click on '...'
3. Scroll down to '...'
4. See error

Log

crash.log

Additional information

No response

[Frenzie]

Is that with the Kindle legacy build?

[naleo]

Yes, that is using the Kindle legacy build

[NiLuJe]

Does opening webp images from the file manager exhibit the same issue?

[benoit-pierre]

The issue might be we always compile with WEBP_ENABLE_SIMD.

[naleo]

Just tested it, opening a webp from file manager results in the same issue.

[NiLuJe]

The issue might be we always compile with WEBP_ENABLE_SIMD.

Oh, that would certainly explain it, lol ;D.

[benoit-pierre]

@naleo: can you replace koreader/libs/libwebp.so.7 with libwebp_no_simd.zip and try again?

[naleo]

Yes, that appears to fix the issue.

[benoit-pierre]

Great! Thanks for testing.