2017-03-13 17:28:39 +00:00
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menu-icon.png is post-processed with:
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```bash
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[feat, Kobo] On Kobo, drop fb to 8bpp on startup (#4637)
* The Great 8bpp Experiment
Swap to 8bpp on Kobo, because we're 'effing grayscale, for pete's sake!
* Always swap to 8bpp, no matter the launch method.
Because it turned out that, even when restarting Nickel, we had to
restore the expected bitdepth ourselves, because pickel/Nickel didn't do
the job completely.
(I'm going to guess the grayscale flag wasn't getting flipped properly).
* Dither every non-transparent icon to the eInk palette
* Make sure hasBGRFrameBuffer is only enabled when the Kobo fb actually is
@ 32bpp...
* Re-process badly grayscaled icons
* And re-grayscale that one w/ gamma correction so the squares show up
better.
* Allow the fbdepth switch to be disabled (in Developer settings).
Also, allow setting debug mode that way.
Also, forcibly disable verbose logging when disabling debug.
* Update setting name to piggyback on the existing check in reader.lua
* Update icons postprocessing info
2019-03-03 11:31:55 +00:00
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convert menu-icon.png -grayscale Rec709Luma -dither Riemersma -remap eink_cmap.gif -quality 75 png:menu-icon-grayscale.png
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2017-03-13 17:28:39 +00:00
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```
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[feat, Kobo] On Kobo, drop fb to 8bpp on startup (#4637)
* The Great 8bpp Experiment
Swap to 8bpp on Kobo, because we're 'effing grayscale, for pete's sake!
* Always swap to 8bpp, no matter the launch method.
Because it turned out that, even when restarting Nickel, we had to
restore the expected bitdepth ourselves, because pickel/Nickel didn't do
the job completely.
(I'm going to guess the grayscale flag wasn't getting flipped properly).
* Dither every non-transparent icon to the eInk palette
* Make sure hasBGRFrameBuffer is only enabled when the Kobo fb actually is
@ 32bpp...
* Re-process badly grayscaled icons
* And re-grayscale that one w/ gamma correction so the squares show up
better.
* Allow the fbdepth switch to be disabled (in Developer settings).
Also, allow setting debug mode that way.
Also, forcibly disable verbose logging when disabling debug.
* Update setting name to piggyback on the existing check in reader.lua
* Update icons postprocessing info
2019-03-03 11:31:55 +00:00
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The intent being to grayscale, dither down to the 16c eInk palette, and save as a 16c paletted grayscale PNG.
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Start from an RGB copy of the image if you end up with a 256c or sRGB PNG (check via IM's identify tool).
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See https://www.mobileread.com/forums/showpost.php?p=3728291&postcount=17 for more details ;).
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