I was looking to invert the eink screen (black background / night reading mode) but couldn't find a clean solution for kindle online. Although I could not get kindle reader to invert colors, I found a solution others were using with Koreader. Here is what I did.
-JB, KUAL, USBnetworking (optional)
-install Koreader
-run Koreader for the first time to create a (/mnt/us/)koreader/data/cr3.ini file
Then the aim is to do what trekk did here and modify the cr3.ini file:
http://www.mobileread.mobi/forums/sh...=216960&page=9 switch the "crengine.display.inverse=0" from 0 to 1.
This can be done manually and then Koreader will always produce a black background book with white text, or you can make a few changes to the Koreader files to create a toggle switch.
A new file "koreader_night.sh" should be put in "/mnt/us/koreader/" which has the following lines (thanks muness):
Quote:
#!/bin/sh
sed -e'/crengine.display.inverse/ y/01/10/' -i /mnt/us/koreader/data/cr3.ini
echo "toggled inverse flag"
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Then add a toggle menu item to the Koreader menu.json file.
Quote:
,
{
"name": "toggle night mode",
"priority": 5,
"action": "./mnt/us/koreader/koreader_night.sh",
"refresh": false,
"checked": true,
"exitmenu": false
}
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Now you can read in night mode on a Kindle through Koreader and you can toggle it on and off.
Next step is to work out how to sync the book pages between Kindle and Koreader. Any ideas?