Better PDF/CBR/CBZ/EPUB generation ?

[MikeZeDev]

1. Begin able to generate PDF for VOLUMES and not CHAPTERS.

Ofc we aint gonna guess which chapters for which volume. User select downloaded chapters from the UI, right click, generate => PDF.

2. Afaik PDFKIT library is NOT able to handle WEBP. Find a PDF library that we can integrate AND being able to deal with WEBP, or convert WEBP before processing?

[Sheepux]

Split this enhancement request in 2 separate ones:

1. "Merge downloads together" ( volume or ....)
2. Better pdf library

[MikeZeDev]

Note : good old PDFKit got the problem with PNG + it cant handle WEBP, which are major problems.

[ronny1982]

To the best of my knowledge the latest version of PDF specs (2020) does still not include support for WebP, therefore it has to be converted to PNG/JPEG.

[Murshid7absi]

maybe this can help for PDF libraries: https://byby.dev/js-pdf-libs

[Sheepux]

maybe this can help for PDF libraries: https://byby.dev/js-pdf-libs

this doesn't solve the volume (it's not related to the pdf lib but to the way we decide to put content in it).
this doesn't solve the webp issue as it's a pdf issue

[Murshid7absi]

you can use Pillow library to convert from various image formats. Then use ReportLab or PyMuPDF to create the pdf which also support various formats including WEBP if Pillow doesn't work for you.

Edit: now I see that I suggested a solution for python not typescript. but if you can integrate it maybe it will help idk

[ronny1982]

See: 2c3f5a7#diff-694ec51ee160ab7e75fb3ed61f3d78d958e3d09a1788c1731a149f13b3c3fa31

Merging multiple chapters would be a massive effort since existing PDF, EPUB, CBZ needs a mechanism to integrate new images into the existing containers while dealing with the correct order.
Furthermore it would be quite difficult to track chapters that have already been downloaded by just looking at the images of such container formats.