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Old 09-22-2007, 09:13 PM   #1
kovidgoyal
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Open source LRF viewer

libprs500 0.4.1 has an open source cross-platform LRF viewer that supports hyphenation (for english) and uses real fonts instead of the SONY's limited three. Use it from the command line (for the moment) by
Code:
lrfviewer mybook.lrf
Note that this is an initial implementation and so its bound to be buggy. I've only tested it with LRF files generated by recent versions of libprs500. Also the current implementation is slow/memory intensive, so I doubt its suitable for use on handhelds. I will work on speeding it up when I get the time.

It doesn't support the DrawChar tag as yet (Used to make drop-caps) and the search functionality is not implemented.
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Old 09-22-2007, 10:11 PM   #2
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Is it going to support full justification instead of left justification?
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Old 09-22-2007, 10:30 PM   #3
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Wonderful.... this provides a spark of hope for long term readability of the non-DRM'd BBeB files!
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Old 09-22-2007, 11:04 PM   #4
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Is it going to support full justification instead of left justification?
Not sure what you mean by "full" justification. It already supports hyphenation.
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Old 09-22-2007, 11:06 PM   #5
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Not sure what you mean by "full" justification. It already supports hyphenation.
The Sony Reader supports full justification but not hyphenation.

Full justification is where the right edge is not ragged. Like in most dead tree books.
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Old 09-22-2007, 11:11 PM   #6
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This is a wonderful addition to libprs500. Karma is on its way.
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Old 09-22-2007, 11:13 PM   #7
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Quote:
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The Sony Reader supports full justification but not hyphenation.

Full justification is where the right edge is not ragged. Like in most dead tree books.
That's achieved by hyphenation, so yes.
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Old 09-22-2007, 11:13 PM   #8
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This is a wonderful addition to libprs500. Karma is on its way.
Thanks.
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Old 09-22-2007, 11:34 PM   #9
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That's achieved by hyphenation, so yes.
Yes to full justification is going to be added to the viewer in some later version?
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Old 09-22-2007, 11:43 PM   #10
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It's already there.
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Old 09-22-2007, 11:53 PM   #11
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If you look at the photo I have attached, what you will see is left justified, not full justified.
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Old 09-23-2007, 12:06 AM   #12
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Ahh I see, you mean adjusting the space between words so that the line ends at the same point. Yeah I can do that, but I'm not sure it's a desirable goal. The SONY reader does it and I think it looks worse. Of course, with hyphenation it doesn't look as bad since the adjustments to wordspacing are typically smaller.
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Old 09-23-2007, 12:10 AM   #13
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If Sony supported Hyphenation, then the word spacing would almost be the same on every line. You might have the odd line here or there where auto-hyphenation won't work, but it would look better overall. The best way to do hyphenation is to use a dictionary to lookup the words.
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Old 09-23-2007, 12:21 AM   #14
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My viewer does precisely that. It uses the Liang hyphenation algorithm, which is the same as that used in Tex. However to achieve perfect justification you have to combine that with flexible word spacing, which works well in books that have small print, but I don't think it looks so good at the larger sizes at which electronic documents are typically viewed.
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Old 09-23-2007, 12:24 AM   #15
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Well to be honest, other then the hyphenation, it looks like we are viewing on a simulated Libre. I do think full justification would look fine. I get it justified using MS Reader on my computer and I have no complaints that it's not left justified.
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