Kobo Patcher

[pietro77]

Thanks. I checked few last page but I missed that.

[fionvarre]

Just managed to successfully patch my Aura HD using the zip file GeoffR provided in post #605. Thanks GeoffR! Will use the patch you provided as is for now, but I'll try to play with values later on.

Anyway, just wanted to ask, is there also a patch to override CSS settings? I have a few sideloaded epubs who stay in default settings even when I try to change the viewing font. Only the font won't change (font sizes and line spacing do, but if I go up a font setting the default font displays really huge, so I'd like to change the font to a more viewable one).

[GeoffR]

Originally Posted by fionvarre

Anyway, just wanted to ask, is there also a patch to override CSS settings? I have a few sideloaded epubs who stay in default settings even when I try to change the viewing font. Only the font won't change (font sizes and line spacing do, but if I go up a font setting the default font displays really huge, so I'd like to change the font to a more viewable one).

There is a patch that strips all css, but in most cases it ruins the formatting of the book. A patch that just strips the font-family settings would have the effect you want for some books, perhaps even a majority of books, but would still ruin some.

A better solution is just to edit the css of the offending books.

Find out which font is used for the main text, say it is font-family: Charis; Then delete all font-family: Charis; lines in the css (or if you prefer, leave the ones that apply to titles and chapter headings, etc) and add one new line at the top of the file: body {font-family: Charis;}

With these changes you will be able to see the book as it originally was by selecting the "Document Default" font, but the font used for the main text will change when you select another font.

[byblo]

See this post to unlock fonts and line spacing patch without ignoring entirely the CSS settings: https://www.mobileread.com/forums/sho...&postcount=456

Maybe you missed it. (btw, I've been using these during one month now with my epub books, and did not encountered yet any problem using them)

[Iñigo]

@GeoffR

I've tried to run your "patch32lsb" program in my computer but it doesn't work.

[inigo@inigo 0]$ ./patch32lsb -p kpg-311.conf -i libnickel.so.1.0.0 -o ./usr/local/Kobo/libnickel.so.1.0.0
Read 21284216 bytes from input file 'libnickel.so.1.0.0'
./patch32lsb: line 13 in 'kpg-311.conf': replace_string unescaped '\' character.

Is it compatible with 64 bits or only for 32 bits linux?

Thanks,
Iñigo

[henriquemaia]

Originally Posted by byblo

See this post to unlock fonts and line spacing patch without ignoring entirely the CSS settings: https://www.mobileread.com/forums/sho...&postcount=456

Maybe you missed it. (btw, I've been using these during one month now with my epub books, and did not encountered yet any problem using them)

byblo, thanks for this. Is this patch still compatible with the latest firmware?

[byblo]

Currently only on 3.0.0 firmware, since i didnt bothered to upgrade my glo yet.

In theory, it should not be hard to adapt these patches to the latest firmware (unless fundamental changes between 3.0.0 and latest)

If you are interested in testing these with the latest firmware (3.1.1?) I can quickly provide the updated patches values.

[henriquemaia]

I'm running 3.1.1, so I'm sure willing to give it a try. I'll be thankful if you provide such values.

[GeoffR]

Originally Posted by Iñigo

./patch32lsb: line 13 in 'kpg-311.conf': replace_string unescaped '\' character.

Just remove the "\x00" from the end of the footer string, I haven't added code to parse that yet. The \x00 adds a null terminator to the string because patcher doesn't do it itself when the replace_xor method is used. However patch32lsb does it automatically, so the \x00 is not needed.

(BTW it should run correctly on 32- and 64-bit machines, the 32lsb in the name refers to the executable that is being patched, i.e. Kobo devices run 32-bit little-endian code.)

[Iñigo]

Originally Posted by GeoffR

Just remove the "\x00" from the end of the footer string, I haven't added code to parse that yet. The \x00 adds a null terminator to the string because patcher doesn't do it itself when the replace_xor method is used. However patch32lsb does it automatically, so the \x00 is not needed.

(BTW it should run correctly on 32- and 64-bit machines, the 32lsb in the name refers to the executable that is being patched, i.e. Kobo devices run 32-bit little-endian code.)

Oh,ok. That was it.

Thanks a lot.

[byblo]

Originally Posted by henriquemaia

I'm running 3.1.1, so I'm sure willing to give it a try. I'll be thankful if you provide such values.

Here you have: (to whoever want to apply these patches, please do not forget to read this post first https://www.mobileread.com/forums/sho...&postcount=456 ,for all details and notes related)
edit: warning: untested yet on 3.1.1

# For 3.1.1

<Patch>
patch_name = `Force user selected font (Ignore external font-family in CSS and style tag)`
patch_enable = `yes`
# Warning: This is an EXPERIMENTAL patch will replace all "font-family" to "_ont-family"
#          ALL patches - except the last one - are necessary since they all rely to the change of the last one.
#          This is barbarian, dirty workaround and maybe unsafe, but in waiting for better... (ONLY for .epub Does NOT work for .kepub)
#          Patch by byblo
replace_string = 010FDF8C, `f`, `_`
replace_string = 010FDFB8, `f`, `_`
replace_string = 010FDFD4, `f`, `_`
replace_string = 01117DA1, `f`, `_`
replace_string = 01117E19, `f`, `_`
replace_string = 01117E91, `f`, `_`
replace_string = 01117F09, `f`, `_`
replace_string = 01117F7A, `f`, `_`
replace_string = 01145CD4, `f`, `_`
replace_string = 01145F25, `f`, `_`
replace_string = 01146511, `f`, `_`
replace_string = 011490C0, `f`, `_`
replace_string = 01149250, `f`, `_`
replace_string = 01149498, `f`, `_`
replace_string = 01149C06, `f`, `_`
replace_string = 0114A03D, `f`, `_`
replace_string = 0114C6D9, `f`, `_`
replace_string = 011506B2, `f`, `_`
replace_string = 011668C8, `f`, `_`
#Note: this is the main entry that has to be replaced to avoid reading font-family on CSS and <style> tags
replace_string = 01445924, `f`, `_`
</Patch>

<Patch>
patch_name = `Force user selected line spacing (Ignore external line-height in CSS and style tag)`
patch_enable = `yes`
# Warning: This is an EXPERIMENTAL patch will replace all "line-height" to "_ine-height"
#          ALL patches - except the last one - are necessary since they all rely to the change of the last one.
#          This is barbarian, dirty workaround and maybe unsafe, but in waiting for better... (ONLY for .epub Does NOT work for .kepub)
#          Patch by byblo
replace_string = 01117FCD, `l`, `_`
replace_string = 01145AF6, `l`, `_`
replace_string = 011494AC, `l`, `_`
replace_string = 0114A079, `l`, `_`
replace_string = 0114C70D, `l`, `_`
replace_string = 01150687, `l`, `_`
replace_string = 01167DA6, `l`, `_`
replace_string = 0116A5E8, `l`, `_`
replace_string = 0116A611, `l`, `_`
replace_string = 0116A64C, `l`, `_`
#Note: this is the main entry that has to be replaced to avoid reading line-height on CSS and <style> tags
replace_string = 014445F0, `l`, `_`
</Patch>

<Patch>
patch_name = `Force aspect ratio on pictures (Ignore preserveAspectRatio)`
patch_enable = `yes`
#force to keep aspect ratio of the picture by ignoring the preserveAspectRatio entry (half confirmed. works well when preserveAspectRatio=none)
#can be useful to keep aspect ratio on covers ect...
#          Patch by byblo (ONLY for .epub Does NOT work for .kepub)
replace_string = 01442620, `p`, `_`
</Patch>

Note: BTW, I just tried the .epub.kepub edit:'in 3.0.0', without any success (font and line spacing still locked)

This suggest that the values patched (see the code above) are NOT used by the .kepub renderer. (and if needed, the values to patch for kepub should be to find in another file of the firmware package?)

[evanft]

I haven't updated my Aura HD since 2.8. If I want to go to 3.1.1, do I use version 11 of the patcher along with GeoffR's conf file? Where do I get the libnickel file?

[doubleshuffle]

Originally Posted by evanft

I haven't updated my Aura HD since 2.8. If I want to go to 3.1.1, do I use version 11 of the patcher along with GeoffR's conf file?

Yes, exactly. After installing FW 3.1.1 of course...

Originally Posted by evanft

Where do I get the libnickel file?

Very nicely explained by GeoffR here.

[evanft]

I patched my Aura HD and got the footer to just where I like it, but it appears that opening up the little tool that lets you move quickly through the book and then using it to jump chapters reverts all the changes.

[henriquemaia]

Originally Posted by byblo

Here you have [...]

This suggest that the values patched (see the code above) are NOT used by the .kepub renderer. (and if needed, the values to patch for kepub should be to find in another file of the firmware package?)

Thanks so much for the patch. I have already tried and works perfectly.

Note: Sorry for taking longer to reply, but I have no internet at home, so I have to travel to a relative's place in order to 'get connected'.