I read a lot of PDF files on my C3100 with Cacko 1.23 lite.
I use qpdf2
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qpdf2_render-freetype-2.3.0-070505a-1_arm.ipk
It has two depends files:
libfreetype
libt1
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I don't usually have very large PDF files, but for larger ones, a swap file or partition is recommended.
Last night I was researching information about residential heating boilers, and downloaded the entire library from this page, (all PDF files)
http://www.heatinghelp.com/library.cfmNeedless to say, qpdf2 failed to open a lot of these manuals, tech books, spec sheets, ect.
I have Picsel Browser for Zaurus installed, but since the above manuals totaled above 1.2GB, I copied them to my 2GB SD card.
Picsel Browser requires you to have it's Picsel Browser SD card inserted, in order to use the program. (It's a copy protection thing).
Picsel Browser handles PDF files a LOT better than qpdf2
I just copied a PDF about "residential boilers and their installation", to my hard drive on my Zaurus and it opened in Picsel Browser.
It does have some problems though, some of the pages didn't render.
A lot of these PDF files are scans of old, and very old books/manuals.
The 2 main drawbacks of Picsel Browser are:
1. it is very expensive, probably one of the most expensive softs for a Zaurus.
2. it is tied to the SD card using the "Secure Digital" technology and you must have your original Picsel Browser SD card inserted to use this software.
If I had a CF to SD adapter, I would try opening some of the other 340 heating & boiler related PDF files.
I don't want to copy all of these to my internal HDD on my C3100.
I decided to use my USB SD pocket drive and I am able to open several of these files in Picsel Browser, that wouldn't open with qpdf2
qpdf2 just bawks at a lot of these scans, and shows a blank white page.
Another note on qpdf2. Someone here, that has a lot more experience with PDF and Zaurus, told me awhile back that qpdf2 doesn't handle graphic intensive PDF files very well.
It is well suited for text only and has many zoom levels.
I have read several large text only books in qpdf2 with no problems.
I don't know about the other distros, such as Open Zaurus, pdaXrom, openBSD. I'm sure these distros have their own PDF reading software.
Picsel Browser was designed for Sharp rom (this includes Cacko).
I have been told it won't run in pdaXrom.
I don't know about the other distros.
I hope this helps somewhat.
Jon