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ladybird/Userland/Libraries/LibPDF
Julian Offenhäuser c2ad29c85f LibPDF: Implement png predictor decoding for flate filter
For flate and lzw filters, the data can be transformed by this
predictor function to make it compress better. For us this means that
we have to undo this step in order to get the right result.

Although this feature is meant for images, I found at least a few
documents that use it all over the place, making this step very
important.
2022-11-19 15:42:08 +01:00
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