2017-03-13 17:28:39 +00:00
|
|
|
menu-icon.png is post-processed with:
|
|
|
|
|
|
|
|
|
|
```bash
|
[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
|
|
|
convert menu-icon.png -grayscale Rec709Luma -dither Riemersma -remap eink_cmap.gif -quality 75 png:menu-icon-grayscale.png
|
2017-03-13 17:28:39 +00:00
|
|
|
```
|
[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
|
|
|
|
|
|
|
|
The intent being to grayscale, dither down to the 16c eInk palette, and save as a 16c paletted grayscale PNG.
|
|
|
|
|
Start from an RGB copy of the image if you end up with a 256c or sRGB PNG (check via IM's identify tool).
|
|
|
|
|
|
|
|
|
|
See https://www.mobileread.com/forums/showpost.php?p=3728291&postcount=17 for more details ;).
|
|
|
|
|
|
2020-11-28 16:18:57 +00:00
|
|
|
|
|
|
|
|
Zoom direction icons are generated from direction.LRBT.png with:
|
|
|
|
|
|
|
|
|
|
```bash
|
|
|
|
|
convert direction.LRBT.png -rotate 90 direction.TBLR.png
|
|
|
|
|
convert direction.LRBT.png -rotate 180 direction.RLTB.png
|
|
|
|
|
convert direction.LRBT.png -rotate -90 direction.BTRL.png
|
|
|
|
|
convert direction.BTRL.png -flop direction.BTLR.png
|
|
|
|
|
convert direction.LRBT.png -flop direction.RLBT.png
|
|
|
|
|
convert direction.RLTB.png -flop direction.LRTB.png
|
|
|
|
|
convert direction.TBLR.png -flop direction.TBRL.png
|
|
|
|
|
```
|
