frontend crash when loading a 1x1 pixel image

[kswang1029]

This should be considered as an edge case but might accidentally happen when users generate a 1x1 subimage via the CARTA GUI. This only happens with 1x1 image. With 1xn it works fine.

[veggiesaurus]

I think it's a corner case instead of an edge case 😇

[kswang1029]

I think it's a corner case instead of an edge case 😇

LOL

[veggiesaurus]

remind me again, did we resolve to serve any tile smaller than 4x4 as uncompressed?

[kswang1029]

remind me again, did we resolve to serve any tile smaller than 4x4 as uncompressed?

not sure🤔 I seem not having that memory. Test images are attached.
tmp.zip

[TienHao]

I find out that 1x2, 1x3 and 2x1 images also have this problem.
The tiles in RasterTileData messages contains more elements in imageData than asyncDecompressTile() expects. [width x height x 4]
They all have at least four 0 in the end.

1x1 -> imageData length = 8 (expect 4)

1x2 -> imageData length = 16 (expect 8)

1x3 -> imageData length = 16 (expect 12)

2x1 -> imageData length = 16 (expect 8)

2x2 -> imageData length =16 👍