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Traverse-Research / ispc-downsampler

Image downsampler using a Lanczos filter implemented in ISPC
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Preserve alpha coverage on downsample #33

Closed Athosvk closed 1 year ago

Athosvk commented 1 year ago

This makes it so that downsampling of images does not fully diminish the alpha channel (for alpha cutoff textures). This is essentially a port of the implementation in nvdia texture tools.

Ideally we do this in ISPC which will come in a later PR, but this is a good start.

MarijnS95 commented 1 year ago

Ideally we do this in ISPC which will come in a later PR, but this is a good start.

Why wasn't this implemented as ISPC code from the get-go? As it appears to purely be a post-process without affecting the downscaling algorithm that completely defeats the purpose of this algorithm living inside this crate, and should be provided as a separate standalone operation instead.