MobileRead Forums - View Single Post - iLiad Community iPDF

wpd · 10-27-2007, 08:05 AM

These patches add a new column mode in addition to the page/contineous modes in portrait view to ipdf irex rev 25 / stock 2.11.

Please note that a pdf does not specify anything regarding textwords / lines / columns / flows. The poppler library, that is used by ipdf to render pdf files, has a textoutput device that makes use of a number of heuristics to determine words, lines and columns. This textoutput device is also used in the poppler tool pdf2text.

With a small interface adjustment in poppler (poppler.patch), ipdf can query poppler about rendered text columns (ipdf.patch).

Features:

"column mode" icon is hidden under page/contineous mode when in portrait view
Works best when zoomed in on a (set of) columns
Every textbox with 2 lines or more, with the current rotation, is considered a column
Short flipbar next/previous = move to next/previous column
Long flipbar next/previous = move to next/previous page; first/last column
Tap on column = move to tapped column
Columns that are completely in view are skipped over when considering next/previous column. This allows you to read an entire portrait page be fore flipping, instead of flipping for each column individually.
Current column is identified using a black rectangle; note that you can configure this away in the source. I left it in to allow ppl to see in what order columns are identified and processed.
Extensive logging; try ipdf-nologging or configure the source to remove them.
Column mode and current column are saved and loaded in manifests.

How to try:

ipdf
ipdf-nologging

These arm binaries have the modified poppler library linked in statically, i.e. you can give one of them a go by simply copying it to /usr/bin/ipdf.

When using ipdf, try

/sbin/syslogd -s 500 -b 0 -O log

and take a look at the file 'log' to see what it is doing.

Ps. the static linking clobbers a securityhandler in poppler. My guess is that password protected pdfs will fail with this ipdf. This goes away if you compile from the source (ipdf-column.tgz) and copy both the new poppler library and the new ipdf to your iliad.

10-27-2007, 08:05 AM	#2
wpd Junior Member Posts: 7 Karma: 221 Join Date: Oct 2007 Device: iliad/nokia9500	column mode patch These patches add a new column mode in addition to the page/contineous modes in portrait view to ipdf irex rev 25 / stock 2.11. Please note that a pdf does not specify anything regarding textwords / lines / columns / flows. The poppler library, that is used by ipdf to render pdf files, has a textoutput device that makes use of a number of heuristics to determine words, lines and columns. This textoutput device is also used in the poppler tool pdf2text. With a small interface adjustment in poppler (poppler.patch), ipdf can query poppler about rendered text columns (ipdf.patch). Features: "column mode" icon is hidden under page/contineous mode when in portrait view Works best when zoomed in on a (set of) columns Every textbox with 2 lines or more, with the current rotation, is considered a column Short flipbar next/previous = move to next/previous column Long flipbar next/previous = move to next/previous page; first/last column Tap on column = move to tapped column Columns that are completely in view are skipped over when considering next/previous column. This allows you to read an entire portrait page be fore flipping, instead of flipping for each column individually. Current column is identified using a black rectangle; note that you can configure this away in the source. I left it in to allow ppl to see in what order columns are identified and processed. Extensive logging; try ipdf-nologging or configure the source to remove them. Column mode and current column are saved and loaded in manifests. How to try: ipdf ipdf-nologging These arm binaries have the modified poppler library linked in statically, i.e. you can give one of them a go by simply copying it to /usr/bin/ipdf. When using ipdf, try /sbin/syslogd -s 500 -b 0 -O log and take a look at the file 'log' to see what it is doing. Ps. the static linking clobbers a securityhandler in poppler. My guess is that password protected pdfs will fail with this ipdf. This goes away if you compile from the source (ipdf-column.tgz) and copy both the new poppler library and the new ipdf to your iliad.