Open cdecompilador opened 1 year ago
PDF specification supports 3 types of encoding depending on K
value:
K<0
- Pure 2-dimensional encoding (Group 4), which is suported by pdfreader
K=0
- Pure one-dimensional encoding (Group 3, 1-D), - which is in use in this file and not supported at this pointK>0
- Mixed one and two dimensional, not supported.I treat as a feature request to start supporting pure one dimensional encodings.
See https://www.fileformat.info/mirror/egff/ch09_05.htm#CH09-DMYID.1.1
Attaching the sample file as the link in the first comment doesn't work. fax-G31D.pdf
link to sample pdf The pdf is just a random image scanned from my printer, it fails at
filters/ccittfax.py:548