Homebrew CTR_Redshift - hardware-based blue light filter for old3DS and 2DS

Nutez · Sep 22, 2018

Sono said:
I have absolutely no idea anymore how I did it, sorry. Try using my sources instead of someone else's, that might work better.

No worries, I am trying to use your code from here: https://gist.github.com/SonoSooS/d9dfd74a65f5c9ae2c13d76c2c29b5fa but that also includes colorramp so I was just looking for any way to get that in. I'll give it a few more attempts but it's probably beyond my technical abilities for now.

Nutez · Sep 23, 2018

Edit: Updated firm here.

So I figured it out in the end, it was just a typo in my redshift.h file causing all the includes to break xD. Then I needed to add an '-lm' flag into the makefile as shown here: https://github.com/AuroraWright/Lum...a24c#diff-df3b0b90e9112ef9de99f7fb6e99c1acR16 to sort some "undefined reference to" errors.

Anyway, on to the good part...

I've attached firms for N3DS and O3DS - so please use the correct one! The only reason for the difference is that Luma chops the top menu option off for O3DS (to stop you accessing the "New 3DS menu..."). However, I wanted the redshift option to be top of the list so I could easily select it with my eyes closed.

The minor changes to Sono's original module implementation are all just my personal preferences:

SELECT now toggles LEDs (LEDs also toggle upon opening menu)
B instead returns to previous menu
UP/DOWN now navigate, RIGHT/LEFT change values
X applies changes to top screen
Text change from Luma blue to red/white

Big thanks to Sono for giving us CTR_Redshift in the first place and the Luma team for making it possible to add modules.

Edit: Added source files and fixed brightness >1 issue xD

seren3 · Sep 23, 2018

Thank you so much, Nutez, for bringing coziness into the future.

Der_Blockbuster · Nov 2, 2018

Short Question, I compared my N3dsXL to the N2dsXl of my Girlfriend and noticed that both screens are a bit more yellow, so not really true white. Can this be fixed with this homebrew?

Sono · Nov 2, 2018

Der_Blockbuster said:
Short Question, I compared my N3dsXL to the N2dsXl of my Girlfriend and noticed that both screens are a bit more yellow, so not really true white. Can this be fixed with this homebrew?

Completely can't be fixed due to the LCD characteristics, but you could make a LUT which is close enough to a good color palette.

Der_Blockbuster · Nov 2, 2018

Sono said:
Completely can't be fixed due to the LCD characteristics, but you could make a LUT which is close enough to a good color palette.

Oh okay, thank you for the answer.
Can you help me? I've never used your homebrew, will this be running in the background at all times?
How difficult is it to change it?
I'm currently not @home so I can't try it on my own.

Appreciate the help!

Exavold · Nov 2, 2018

FINALLY

Sono · Nov 2, 2018

Der_Blockbuster said:
Oh okay, thank you for the answer.
Can you help me? I've never used your homebrew, will this be running in the background at all times?
How difficult is it to change it?
I'm currently not @home so I can't try it on my own.

Appreciate the help!

I'd need to write a homebrew to do that.
It doesn't run in the background because it's hardware-based.

Also, have you tried this one? You can also make the screen a little bit more blue. In fact, I think there is an option to adjust the gamma for each color individually.

If you go the bruteforce way then afaik you can keep the button held while adjusting to adjust the LUT in real time.

Der_Blockbuster · Nov 2, 2018

Sono said:
I'd need to write a homebrew to do that.
It doesn't run in the background because it's hardware-based.

Also, have you tried this one? You can also make the screen a little bit more blue. In fact, I think there is an option to adjust the gamma for each color individually.

If you go the bruteforce way then afaik you can keep the button held while adjusting to adjust the LUT in real time.

Yeah in the end, I just have to reduce the red a bit, but yeah the bruteforce method should get me where I want to.
I'll try that and talk back how It went.

PRAGMA · Nov 18, 2018

Nutez said:
So I figured it out in the end, it was just a typo in my redshift.h file causing all the includes to break xD. Then I needed to add an '-lm' flag into the makefile as shown here: https://github.com/AuroraWright/Lum...a24c#diff-df3b0b90e9112ef9de99f7fb6e99c1acR16 to sort some "undefined reference to" errors.

Anyway, on to the good part...

I've attached firms for N3DS and O3DS - so please use the correct one! The only reason for the difference is that Luma chops the top menu option off for O3DS (to stop you accessing the "New 3DS menu..."). However, I wanted the redshift option to be top of the list so I could easily select it with my eyes closed.

The minor changes to Sono's original module implementation are all just my personal preferences:

SELECT now toggles LEDs (LEDs also toggle upon opening menu)

B instead returns to previous menu

UP/DOWN now navigate, RIGHT/LEFT change values

X applies changes to top screen

Text change from Luma blue to red/white

Big thanks to Sono for giving us CTR_Redshift in the first place and the Luma team for making it possible to add modules.

Setting it to higher than 1 (for more brightness) does a bad:
Failed to fetch tweet https://twitter.com/PRAGMA/status/1064141841963065345

Itzumi · Nov 18, 2018

PRAGMA said:
Setting it to higher than 1 (for more brightness) does a bad:
https://twitter.com/PRAGMA/status/1064141841963065345

it seems to have sorta inverted colors?

PRAGMA · Nov 18, 2018

Itzumi said:
it seems to have sorta inverted colors?

Kinda a mix, they arent inverted its like a mix between em or some shit. like white is still white, just edges and shit are like doubled up and colors are all weird

Itzumi · Nov 18, 2018

PRAGMA said:
Kinda a mix, they arent inverted its like a mix between em or some shit. like white is still white, just edges and shit are like doubled up and colors are all weird

hmm. wonder what code wise causes this?

Sono · Nov 18, 2018

PRAGMA said:
Setting it to higher than 1 (for more brightness) does a bad:
https://twitter.com/PRAGMA/status/1064141841963065345

Itzumi said:
hmm. wonder what code wise causes this?

That looks like integer overflow. Too white colors will become black again.

PRAGMA · Nov 18, 2018

Sono said:
That looks like integer overflow. Too white colors will become black again.

Yeah thats what it feels like :/

jelbo · Nov 20, 2018

Nutez said:
I've attached firms for N3DS and O3DS - so please use the correct one!

So, these are custom Luma3DS 9.1 builds? /edit: after fully reading the thread: yes, they are.

Hmm, I now have to choose between @Nanquitas' Luma3DS 9.1 build with the CTRPluginFramework capability and this one

Luckily, with fastboot3DS it's easy to add it in my boot menu. Thanks for your work on this, @Nutez and @Sono!

jelbo · Nov 21, 2018

PRAGMA said:
Setting it to higher than 1 (for more brightness) does a bad:
https://twitter.com/PRAGMA/status/1064141841963065345

Can confirm on N3DSXL. It starts to incrementally blow out highlights until everything looks inverted. So, no brightness change possible. Color temp works fine.

Nutez · Nov 21, 2018

PRAGMA said:
Setting it to higher than 1 (for more brightness) does a bad:
https://twitter.com/PRAGMA/status/1064141841963065345

Ah, sorry that was me guessing the MAX_BRIGHTNESS value when making a header file. I'm sure I checked against the original cia & luma implementation and thought it could go up to 10: evidently not. I've rebuilt both firms to have 1.0 as max and provided my hacky source files for anyone who would like to critique and tweak.

PRAGMA · Nov 21, 2018

Nutez said:
Ah, sorry that was me guessing the MAX_BRIGHTNESS value when making a header file. I'm sure I checked against the original cia & luma implementation and thought it could go up to 10: evidently not. I've rebuilt both firms to have 1.0 as max and provided my hacky source files for anyone who would like to critique and tweak.

So theres absolutely no way to make the screen BRIGHTER thats the only reason I want this

Sono · Nov 21, 2018

PRAGMA said:
So theres absolutely no way to make the screen BRIGHTER thats the only reason I want this

If you have a new3DS then it's not possible until there will be a proper gsp patch which disables automatic brightness and someone writes a daemon inside Rosalina to look for 3D mode and switch between 2x brightness and 0.5x brightness accordingly.

2DS is the best in this regard because it doesn't have 3D, so the backlight will be kept until something happens.

Homebrew CTR_Redshift - hardware-based blue light filter for old3DS and 2DS

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