Closest output profile to Kobo Forma in "Convert Book" dialog is "Kobo Reader" but..

droopy · 10-13-2019, 09:45 PM

I'm in the "Convert Book" dialog window. In the "Page Setup" section (from the left sidebar), the closest "Output profile" is "Kobo Reader". The profile description says "This profile is intended for the Kobo Reader [Screen size: 536 x 710 pixels]".

A Kobo Forma screen size is 1440 × 1920 pixels. Won't choosing the 536x710pixel "Kobo Reader" profile not be good enough?

Is there no way I can create a "Kobo Forma" "output profile"?

kovidgoyal · 10-13-2019, 09:49 PM

Just use Tablet and you will be fine, modern devices are capable of resizing images reasonably well on their own.

droopy · 10-13-2019, 09:55 PM

Kovid,
thanks for your reply.
Is there no way to tell Calibre the precise screen size of my device's screen (i.e.,1440 × 1920 )?

kovidgoyal · 10-13-2019, 10:00 PM

why does it matter?

droopy · 10-13-2019, 10:06 PM

Kovid,

Well, I guess it's because tablets are usually full-color. My Kobo Forma is grayscale
Also in a thread I created on the KoboReader subforum, NiLuje told me that it's taxing to rely on the device to resize images. Better for Calibre to create the hard work.

Quote:

Originally Posted by NiLuJe

Scaling is *expensive*, trust me, you *want* them cached, or navigating your Library would be even slower, and would murder your battery.

kovidgoyal · 10-13-2019, 10:09 PM

Grayscaling is not controlled by output profile. And even if you did specify the exact screen size, it is likely the device will still have to resize the image, because the actual available display area in the book reader wont be the screen size, there will be margins, etc.

NiLuJe · 10-13-2019, 10:52 PM

Context: I was talking about the Kobo's thumbnails. Which have nothing whatsoever to do with in-book content.

As Kovid said, tablet profile is the way to go, no need to overthink it.

10-13-2019, 09:45 PM	#1
droopy Guru Posts: 834 Karma: 2912460 Join Date: Apr 2009 Device: Kobo Forma	Closest output profile to Kobo Forma in "Convert Book" dialog is "Kobo Reader" but.. I'm in the "Convert Book" dialog window. In the "Page Setup" section (from the left sidebar), the closest "Output profile" is "Kobo Reader". The profile description says "This profile is intended for the Kobo Reader [Screen size: 536 x 710 pixels]". A Kobo Forma screen size is 1440 × 1920 pixels. Won't choosing the 536x710pixel "Kobo Reader" profile not be good enough? Is there no way I can create a "Kobo Forma" "output profile"?

10-13-2019, 10:52 PM	#7
NiLuJe BLAM! Posts: 13,506 Karma: 26047190 Join Date: Jun 2010 Location: Paris, France Device: Kindle 2i, 3g, 4, 5w, PW, PW2, PW5; Kobo H2O, Forma, Elipsa, Sage, C2E	Context: I was talking about the Kobo's thumbnails. Which have nothing whatsoever to do with in-book content. As Kovid said, tablet profile is the way to go, no need to overthink it. Last edited by NiLuJe; 10-13-2019 at 10:56 PM.

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10-13-2019, 09:49 PM	#2
kovidgoyal creator of calibre Posts: 45,144 Karma: 27110894 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Just use Tablet and you will be fine, modern devices are capable of resizing images reasonably well on their own.

10-13-2019, 09:55 PM	#3
droopy Guru Posts: 834 Karma: 2912460 Join Date: Apr 2009 Device: Kobo Forma	Kovid, thanks for your reply. Is there no way to tell Calibre the precise screen size of my device's screen (i.e.,1440 × 1920 )?

10-13-2019, 10:00 PM	#4
kovidgoyal creator of calibre Posts: 45,144 Karma: 27110894 Join Date: Oct 2006 Location: Mumbai, India Device: Various	why does it matter?

10-13-2019, 10:09 PM	#6
kovidgoyal creator of calibre Posts: 45,144 Karma: 27110894 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Grayscaling is not controlled by output profile. And even if you did specify the exact screen size, it is likely the device will still have to resize the image, because the actual available display area in the book reader wont be the screen size, there will be margins, etc.

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