KPV: a PDF reader for Kindle, based on muPDF, GPLv3 - Page 10

hawhill · 03-08-2012, 01:28 PM

Quote:

Originally Posted by Germanc

And also pdf rendering is a lot faster than before, but sadly it still is slower than in duokan.

In earlier versions of Duokan - when it was still called simply "Duokan" - PDF rendering was also done using muPDF. I'm still angry at these guys for not releasing their source. Legal stuff aside, they just owe it to the community. But I'm not here for ranting, instead I'm a bit curious: what version of Duokan are you testing against?

Germanc · 03-08-2012, 03:01 PM

Quote:

Originally Posted by hawhill

In earlier versions of Duokan - when it was still called simply "Duokan" - PDF rendering was also done using muPDF. I'm still angry at these guys for not releasing their source. Legal stuff aside, they just owe it to the community. But I'm not here for ranting, instead I'm a bit curious: what version of Duokan are you testing against?

Duokan 2012 R2.1, it was out a week ago; but pdf performance had been the same since R1.1. The difference is really big with image heavy files (mostly scanned physics/math books), from 4-5s in mupdf to less than 1s in duokan. I would love to know what they are using for rendering.

dave2008 · 03-08-2012, 07:50 PM

Quote:

Originally Posted by medwatt

The djvu is working great. However I notice that at one time it was not kindle was not responsive to certain actions. Then I turned it off. When I switched it on again, the actions corresponding to the set of actions were then executed. Is there a way to move landscape directly ? Also when using pdf I don't seem to find a way to crop automatically to text region because some pdfs have a lot of white space at the margins.
Thanks once more, at least djvu is readable.

What do you mean by switch off? You mean turn kindle into sleep mode?

If the reader is busy rendering your book, then it will not be responsive to all the actions. Maybe your book has large images. I don't have this kindle of djvu file to test with. If you really want to fix this, you can send us the file.

Feature for moving to landscape directly is underdevelopment. We have working demo, but quite ugly ;P

If you want to auto crop margin in pdfs, try Shift+S or Shift+D. The first one means fit to content width while the latter one means fit to content height. This won't work for all pdfs, so sometime you might want to try manual cropping, which works quite well for me when reading djvus.

dave2008 · 03-08-2012, 08:02 PM

Quote:

Originally Posted by Germanc

Duokan 2012 R2.1, it was out a week ago; but pdf performance had been the same since R1.1. The difference is really big with image heavy files (mostly scanned physics/math books), from 4-5s in mupdf to less than 1s in duokan. I would love to know what they are using for rendering.

1s to load the full page or just part of the page in zooming?

Germanc · 03-08-2012, 08:47 PM

Quote:

Originally Posted by dave2008

1s to load the full page or just part of the page in zooming?

I disabled cropping and used fit page. It's 1s to load the full page in duokan and 6s with mupdf under the same settings. I'm testing with a 110mb pdf with only images (scanned physics book). Also duokan seems to be using some kind of caching because going back and forward over the same pages is really fast, but sometimes if I change pages forward to fast it takes a little more to draw.

Edit: FWIW, these big files I'm testing also render faster with the built in pdf viewer

hawhill · 03-09-2012, 07:43 AM

Yeah, we also have caching of rendered pages - however, it only really works in full-page mode right now, since it was not yet adapted properly to the current state of zooming, panning, etc. - this is something to improve.

Germanc · 03-10-2012, 12:05 PM

I like where the project is heading, and I think that next page caching is all that is lacking to be as fast as I need. While I prepare the poster with your names on it I promised before, I have a question: djvu TOC (outlines) is something planned ?

Germanc · 03-10-2012, 06:24 PM

Quote:

Originally Posted by Germanc

I like where the project is heading, and I think that next page caching is all that is lacking to be as fast as I need. While I prepare the poster with your names on it I promised before, I have a question: djvu TOC (outlines) is something planned ?

Well, I gave it a shot to add djvu outlines support. Here is the diff. I tested with severeal djvu files I have and it works well, but I wouldn't trust my code. I haven't code in C in ages (not to mention I have no idea how lua, lua bindings or djvu works)

EDIT: oh well, it doesn't compile with arm-...-gcc. It worked well with sdl.

EDIT2: Now it compiles and list bookmarks correctly, but fails to change the page -.-

EDIT3: Damn single-double quotes. Now it DOES work.

dpavlin · 03-10-2012, 07:06 PM

Quote:

Originally Posted by Germanc

Well, I gave it a shot to add djvu outlines support. Here is the diff. I tested with severeal djvu files I have and it works well, but I wouldn't trust my code. I haven't code in C in ages (not to mention I have no idea how lua, lua bindings or djvu works)

Thanks! Issue for tracking your contribution at: https://github.com/hwhw/kindlepdfviewer/issues/61

dave2008 · 03-10-2012, 07:56 PM

Quote:

Originally Posted by Germanc

Well, I gave it a shot to add djvu outlines support. Here is the diff. I tested with severeal djvu files I have and it works well, but I wouldn't trust my code. I haven't code in C in ages (not to mention I have no idea how lua, lua bindings or djvu works)

EDIT: oh well, it doesn't compile with arm-...-gcc. It worked well with sdl.

EDIT2: Now it compiles and list bookmarks correctly, but fails to change the page -.-

EDIT3: Damn single-double quotes. Now it DOES work.

OMG, I just went through the API last night and planned to work on it this morning, when woke up this morining, I saw your patch! Wonderful work Germanc!

Germanc · 03-10-2012, 08:03 PM

Quote:

Originally Posted by dave2008

OMG, I just went through the API last night and planned to work on it this morning, when woke up this morining, I saw your patch! Wonderful work Germanc!

Thanks ! Since I use my kindle mostly to read technical books, this project comes pretty handy to me, so I'm really happy to be useful ! I just sent a pull request but I'm not sure I did it the right way (first time using git or github).

dave2008 · 03-10-2012, 08:57 PM

Quote:

Originally Posted by Germanc

Thanks ! Since I use my kindle mostly to read technical books, this project comes pretty handy to me, so I'm really happy to be useful ! I just sent a pull request but I'm not sure I did it the right way (first time using git or github).

Patch merged into main repo. We have TOC in djvu now

Germanc · 03-11-2012, 10:32 PM

I see jumpstack as some sort of bookmarks, but "jump to %## percent" is adding elements to the list. Is that supposed to be that way ? I "fixed" it for myself (https://github.com/Germanc/kindlepdf...e9b09a3181f33c) and added "Jump 10 pages at a time" while I wait for you guys to add proper "go to page", which is one of the few features I'm still missing.

dave2008 · 03-12-2012, 01:04 AM

Quote:

Originally Posted by Germanc

I see jumpstack as some sort of bookmarks, but "jump to %## percent" is adding elements to the list. Is that supposed to be that way ? I "fixed" it for myself (https://github.com/Germanc/kindlepdf...e9b09a3181f33c) and added "Jump 10 pages at a time" while I wait for you guys to add proper "go to page", which is one of the few features I'm still missing.

Agree with you that jump to percent should not be added to jumpstack, since we have no idea what is in the page before the jump.

Feel to send a pull request if you feel your changes are ready to be merged to main repo

I will work on the goto popup now. After that, I guess the last thing I need is notes taking

dave2008 · 03-12-2012, 02:11 AM

I have added the goto input box that can be invoked with G key. Feel free to get it from the main repo

I guess there is only one last thing we need to finish before the release: the new caching mechanism. Hawill is working on this, but he is a little busy in this weekends :-P

All the rest looks good for me so far, except the annoying memory usage in DXG when reading PDFs with large images. But I can live with it since I only have K3 ;P

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03-09-2012, 07:43 AM	#141
hawhill Wizard Posts: 1,379 Karma: 2155307 Join Date: Nov 2010 Location: Goettingen, Germany Device: Kindle Paperwhite, Kobo Mini	Yeah, we also have caching of rendered pages - however, it only really works in full-page mode right now, since it was not yet adapted properly to the current state of zooming, panning, etc. - this is something to improve.

03-10-2012, 12:05 PM	#142
Germanc Member Posts: 23 Karma: 68 Join Date: Oct 2011 Device: Kindle Keyboard	I like where the project is heading, and I think that next page caching is all that is lacking to be as fast as I need. While I prepare the poster with your names on it I promised before, I have a question: djvu TOC (outlines) is something planned ?

03-11-2012, 10:32 PM	#148
Germanc Member Posts: 23 Karma: 68 Join Date: Oct 2011 Device: Kindle Keyboard	I see jumpstack as some sort of bookmarks, but "jump to %## percent" is adding elements to the list. Is that supposed to be that way ? I "fixed" it for myself (https://github.com/Germanc/kindlepdf...e9b09a3181f33c) and added "Jump 10 pages at a time" while I wait for you guys to add proper "go to page", which is one of the few features I'm still missing.

03-12-2012, 02:11 AM	#150
dave2008 Addict Posts: 251 Karma: 183457 Join Date: Jan 2012 Device: k3G, KDXG, AuraHD	I have added the goto input box that can be invoked with G key. Feel free to get it from the main repo I guess there is only one last thing we need to finish before the release: the new caching mechanism. Hawill is working on this, but he is a little busy in this weekends :-P All the rest looks good for me so far, except the annoying memory usage in DXG when reading PDFs with large images. But I can live with it since I only have K3 ;P