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[Mali Texture Compression Tool][Bug] Image corruption 12x12

Rohit Rao p

Hello ,

I have started using ASTC recently ,
observed some corruption on ASTC texture compressed using 12x12 veryfast using Mali Texture Compression Tool v4.1.0.

Is this expected as 12x12  -veryfast is the lowest quality compression ?

Using -veryfast with other block sizes or 12x12 -fast option does not have this issue.

Thank you,
Rohit

7316.zip
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    Rohit,

    Clearly, this is not correct!

    As Pete says, the different speed modes in the compressor work by restricting the search space of the compression algorithm. It looks like these blocks are somehow completely outside the -veryfast search space and end up as a default grey color. I will pass this on to the compression team and see if we can work out exactly what is going on.

    In the meantime, at least you have a workaround, which is to use -fast mode. I hope that this is sufficient to keep you going for now.

    Thanks for bringing this to our attention.

    Sean.

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  • 0

    Rohit,

    Clearly, this is not correct!

    As Pete says, the different speed modes in the compressor work by restricting the search space of the compression algorithm. It looks like these blocks are somehow completely outside the -veryfast search space and end up as a default grey color. I will pass this on to the compression team and see if we can work out exactly what is going on.

    In the meantime, at least you have a workaround, which is to use -fast mode. I hope that this is sufficient to keep you going for now.

    Thanks for bringing this to our attention.

    Sean.

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