Multi-step flattening to massively improve the quality of the generated PDF's. #4
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
…ed PDF's. PDF viewing software such as preview and acrobat reader auto positions the unflattened form fields when the user views the PDF file in it. But the `pdftk` library doesn't auto position fields before flattening. The `pdftk` does support the ability to create better-positioned fields without flattening using its `need_appearances` option. ref. https://www.pdflabs.com/docs/pdftk-man-page/#dest-output-need-appearances So, we are using a multi-step approach to get the same quality from the `pdftk`, which does the following: 1. fill-up the form with the `need_appearances` flag and without the `flatten` flag 2. regenerating the flattened file out of the non-flattened PDF file, which has better positioning. Empirical results have shown massive improvements in the quality of the generated PDF's: https://ibb.co/KLqtYJC
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
PDF viewing software such as preview and acrobat reader auto positions the unflattened form fields when the user views the PDF file in it. But the
pdftklibrary doesn't auto position fields before flattening. Thepdftkdoes support the ability to create better-positioned fields without flattening using itsneed_appearancesoption.ref. https://www.pdflabs.com/docs/pdftk-man-page/#dest-output-need-appearances
So, we are using a multi-step approach to get the same quality from the
pdftk, which does the following:need_appearancesflag and without theflattenflagEmpirical results have shown massive improvements in the quality of the generated PDF's:
left is before, right is after.