MobileRead Forums - View Single Post

NiLuJe · 07-25-2019, 07:17 PM

Huh. Wouldn't have thought there'd be extra shenanigans for Japanese...

For reference, after an eval $(fbink -e) the final *visible* pixel can be read by our friend dd as such:

dd if=/dev/fb0 skip=$(( ((viewWidth - 1) * (BPP>>3)) + ((viewHeight + (viewVertOrigin - viewVertOffset) - 1) * lineLength) )) count=$((BPP>>3)) bs=1

(It's essentially (x * bpp/4) + (y * line_length), with extra craptastic arithmetics because of the crappy viewports on the H2O & Aura, to make sure we don't end up reading a dead, under the bezel pixel, which Nickel won't necessarily touch).

Pipe to hexdump -vC for testing

.

EDIT²: Fixed it! With a bit of help from FBInk master, because I wasn't exporting line_length before.

07-25-2019, 07:17 PM	#260
NiLuJe BLAM! Posts: 13,506 Karma: 26047202 Join Date: Jun 2010 Location: Paris, France Device: Kindle 2i, 3g, 4, 5w, PW, PW2, PW5; Kobo H2O, Forma, Elipsa, Sage, C2E	Huh. Wouldn't have thought there'd be extra shenanigans for Japanese... For reference, after an eval $(fbink -e) the final visible pixel can be read by our friend dd as such: dd if=/dev/fb0 skip=$(( ((viewWidth - 1) (BPP>>3)) + ((viewHeight + (viewVertOrigin - viewVertOffset) - 1) * lineLength) )) count=$((BPP>>3)) bs=1* (It's essentially (x bpp/4) + (y * line_length), with extra craptastic arithmetics because of the crappy viewports on the H2O & Aura, to make sure we don't end up reading a dead, under the bezel pixel, which Nickel won't necessarily touch). Pipe to hexdump -vC for testing . EDIT²: Fixed it! With a bit of help from FBInk master, because I wasn't exporting line_length before. Last edited by NiLuJe; 07-25-2019 at 08:00 PM.*