chikamichi / gitbook-plugin-pdf-styling Goto Github PK

HummusJS is available on npm and has mergePDFPagesToPage which could be used (twice in a row) to replicate pdftk's background operation. Maybe worth the try. There are more advanced features which could allow for thorough post-processing.

Allow end-user to specify an image configuration key, whose value should be the path to an image to be used as the PDF background.

error: error with pdf-styling: Error: invalid book format
at /tmp/book/node_modules/gitbook-plugin-pdf-styling/lib/post_processing.js:38:13
at _fulfilled (/tmp/book/node_modules/q/q.js:787:54)
at self.promiseDispatch.done (/tmp/book/node_modules/q/q.js:816:30)
at Promise.promise.promiseDispatch (/tmp/book/node_modules/q/q.js:749:13)
at /tmp/book/node_modules/q/q.js:810:14
at flush (/tmp/book/node_modules/q/q.js:108:17)
at _combinedTickCallback (internal/process/next_tick.js:67:7)
at process._tickCallback (internal/process/next_tick.js:98:9)
warn: aborting post-processing of pdf

What can I do to change the books format to get this to work?

Say:

• using both an image (full alpha) & a solid color (alpha 0.6) on top of it;
• using a solid color (full alpha) & an image (alpha 0.85) on top of it;
• etc.

Requires implementing a queue of background-related post-processing, instead of limiting the end-user to one operation type. Probably simply require using an array in book.json.

Allow end-user to specify an color configuration key, whose value should be a color hex code to be used as the PDF background (fill).

Allow end-user to specify an texture configuration key, whose value should be the path to a texture image to be used as the PDF background (fill).