Cropping: Show a transparent overlay

[equwal]

Cropping: Show a transparent overlay

[hugleo]

Ereaders aren't powerful enough to process all pages at the same time to detect such overlay. Manual cropping for even and odd pages is implemented, though.

[Frenzie]

Fit to content width covers most use cases quite well I think.

Incidentally you can use landscape mode for wide PDFs.

[equwal]

Ereaders aren't powerful enough to process all pages at the same time to detect such overlay. Manual cropping for even and odd pages is implemented, though.

Good point, is this true though? I suspect this isn't as resource intensive as it seems. A naïve implementation is to just overwrite the contents of a buffer with N pages, which is O(n) time, then finally display it on the screen. Most ereaders have 1Ghz+ processors so I think this should be doable.

[equwal]

Fit to content width covers most use cases quite well I think.

Incidentally you can use landscape mode for wide PDFs.

This is for removing the margins of the PDF, which fitting to width doesn't do. For literature the margins can be 20% of the page!

[hugleo]

Ereaders aren't powerful enough to process all pages at the same time to detect such overlay. Manual cropping for even and odd pages is implemented, though.

Good point, is this true though? I suspect this isn't as resource intensive as it seems. A naïve implementation is to just overwrite the contents of a buffer with N pages, which is O(n) time, then finally display it on the screen. Most ereaders have 1Ghz+ processors so I think this should be doable.

But the pages are not loaded instantaneous. Some pages can take several seconds to load.

[hugleo]

Fit to content width covers most use cases quite well I think.
Incidentally you can use landscape mode for wide PDFs.

This is for removing the margins of the PDF, which fitting to width doesn't do. For literature the margins can be 20% of the page!

Unless you have a very bad scan, such irregular PDFs are rare nowadays? You can use semi-auto crop to remove some undesired footer that should be common to all pages. The white part will be cropped automatically for all pages. You can perform the process two times if you want, once for the even pages and once for the odd pages. All the even pages will become similar to the first crop, and all the odd pages will behave similarly to the second crop.