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                                            IJzerbaard

Vectorized Paeth filtering (multiple pixels at the same time)

Here's some test code just testing the raw filter, assuming that all rows use Paeth: https://gitlab.com/-/snippets/4781267 I don't necessarily have *good* (representative) numbers on how often it happens that 4...

Vectorized Paeth filtering (multiple pixels at the same time)

The 4-rows-at-a-time technique also wins in the pure filter-vs-filter (which are both SIMD filters but one is the classic pixel-by-pixel one and the other is the 4-rows-at-a-time one) test by...

Vectorized Paeth filtering (multiple pixels at the same time)

The thing that I had integrated into STB is not really fit for sharing, but I have a benchmark where I compare just libpng's Paeth filter vs an 8-rows-at-a-time filter:...