07-15-2009, 01:53 PM | #16 | |
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So basically, what you mean is that the other manufacturers decided to remove the limit or opted for a much higher limit ? What I'd really like to know is if the support for either a higher limit or no limit at all will make it onto the PRS-505/700. Otherwise it'll force content providers to use 300k flows for legacy support. |
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07-15-2009, 04:32 PM | #17 |
speaking for myself
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Th limit is there because we cannot paginate the content starting from the beginning of the chapter fast enough if someone navigates to the end of the chapter (e.g. through TOC). But if we have some known page breaks in the chapter we can start from those. If the chapter is too long, we just insert them heuristically (in future we may start paying attention to page-break CSS properties). In some sense it is the same startegy that converters have to do, but done on the device itself - and the artifacts are the same (artificial page breaks). Still, it's better than dropping CSS altogether IMHO.
Important consideration here is that XML parsing and CSS cascade can be done fast enough even for very large chapters (although we have not squeezed everything there by any means). Layout and rendering are much slower part. However rendering only needs to be done for a single page, so it is almost always layout which causes the most problems when navigating in the middle of the chapter. (Sequential reading performance considerations are different). |
07-15-2009, 04:48 PM | #18 | ||
speaking for myself
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BTW, do you have those Proust EPUB files somewhere? It seems that everyone obeys 300k limit now and it is getting hard to find content which does not. Quote:
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07-15-2009, 04:58 PM | #19 | |
creator of calibre
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07-15-2009, 05:05 PM | #20 | |
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07-16-2009, 07:18 AM | #21 |
frumious Bandersnatch
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But in normal reading, one starts from the beginning and reads page by page until the end. Could that be done without the spurious page breaks? If the book is closed and then opened again to resume reading in the middle of a long "chapter", could it be done so that whatevere spurious pagebreaks needed appear only in the pages before the current position? The point is to provide a smooth reading experience, even if small inconsistencies are introduced when jumping back and forward.
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07-16-2009, 08:52 PM | #22 | |
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07-16-2009, 08:58 PM | #23 | |
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Peter |
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07-18-2009, 08:44 PM | #24 |
Created Sigil, FlightCrew
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