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NiLuJe · 12-03-2018, 05:59 PM

@mathil: Yes, on FW post-32bpp fb switch (4.2? IIRC), the pixel format is BGR, not RGB (meaning the red & blue channels are indeed swapped).

Which is a non-issue when you actually grayscale & dither your images when sideloading, because R=G=B after that

.

EDIT: It's been a while since I checked what the Kobo itself does for Store-bought kePubs, but they used to be kept in color and undithered, possibly in the wrong pixel format.

EDIT²: Depending on what you're using to take your screenshots, the issue may very well lie in that bit of code rather than anywhere else, and as such be fairly innocuous

.

12-03-2018, 05:59 PM	#120
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	@mathil: Yes, on FW post-32bpp fb switch (4.2? IIRC), the pixel format is BGR, not RGB (meaning the red & blue channels are indeed swapped). Which is a non-issue when you actually grayscale & dither your images when sideloading, because R=G=B after that . EDIT: It's been a while since I checked what the Kobo itself does for Store-bought kePubs, but they used to be kept in color and undithered, possibly in the wrong pixel format. EDIT²: Depending on what you're using to take your screenshots, the issue may very well lie in that bit of code rather than anywhere else, and as such be fairly innocuous . Last edited by NiLuJe; 12-03-2018 at 06:10 PM.