Made a new shader for FS-uae.

[kokoko3k]

First post here, so Hello everyone!.

In latest days i've been playing with glsl and shaders.
I never used them before, nor i wrote any shader before, so probably i did some mistakes/unoptimized code, did something already existed, whatever, i don't know.

Anyway, by inspecting other's people code, i came up with a shader that looks good to me; also is very configurable,and i think it is a nice toy to play with.

It has support for several features:
* non linear scanlines on original coordinates
* non linear screenlines on screen coordinates
* custom rgb masks with(out) offset
* glowing,haloing,blooming
* gamma correction
* saturation correction
* alternate blanking (like uae's feature)
* play nicely with FS-UAE's autoscale function

Also, it is important to know that it is meant to be used with:
* line doubling enabled: line_doubling = 1
* low resolution disabled: low_resolution = 0

I've set the default values to match my real arcade crt monitor as much as i can on a 1080p, you may have much better results tuning it for 4k, of course .

Please, share your impressions, ideas, improvements...


Complete gallery:http://wpage.unina.it/aorefice/share...koko-aio-1.35/

Some Examples:


You can download the latest presets here:
http://wpage.unina.it/aorefice/share..._and_pictures/


Have fun!

[ztronzo]

Good job! Just curious.. how does it look in -game with Worms DC and Skeleton Krew? These games had a glitch in FS-UAE which made horizontal pixel shifting on the end of some sprites.. (red arrow in Worms DC and while moving current worm)

I will try on first chance

Sent from my SM-G920W8 using Tapatalk

[kokoko3k]

Didn't try Skeleton Krew, but Worms DC still have that glitch.
I don't think a shader can do much about that...

[ztronzo]

No worries... Skeleton Krew can be corrected with using the Low Resolution option

Checking your screenshots, I find it strange that I see vertical bands of a greenish shade when the images are at a certain size.. nice effect

Sent from my SM-G920W8 using Tapatalk

[kokoko3k]

You've to see them at 100% size, or browser scaling makes funky effects
I know imgur is not the best hosting site in that regard, it requires you several clicks.
Also, from a smartphone i thinks is not even possible!

[kokoko3k]

Made a lot of improvements with some presets for 1080p screens available here:
http://wpage.unina.it/aorefice/sharevari/koko-aio/

This is an attempt to mimic crt-royale with its default settings, it notably misses the bloom effect and scanlines are not "precise":
http://wpage.unina.it/aorefice/share...oko-royale.png

[Bladeforce]

This is fantastic. Just popped on to say thanks its very, very good

[kokoko3k]

I'm very glad you liked it

[kokoko3k]

Thanks to the pandemic, in the last few days i struggled to add bloom to the shader, and now i managed to do it in a way that could run on my poor Haswell igp.
All of the presets reaches 50fps on an intel i5-4590, but with a discrete card, you can tweak them to make them look nicer (bloom quality is very heavy).

Also, in 1.35, i removed various hacks from the shader, and i don't think there is more left to do, edited the first post with new pictures and updated download link.

Have fun!

[dreadnought]

I'm not very familiar with UAE emulation. So far I've copied the files from the linked page to Data/Shaders, and put the line doubling/low res lines into the config. But how do I actually "enable" it all?

[kokoko3k]

I use fs-uae-launcher and in the advanced options, i put something like:
shader = /path/to/my/crt-shader.shader (or shader = c:\path\to\shader on windows).

[RuySan]

By looking at the screenshots, they look pretty good, but i usually get paralysed with so many options. Do you know which one mostly resembles the image on a Commodore 1084 monitor?

[dreadnought]

Ok, that helped.

Interesting stuff, the shadowmask looks really good. Overall it's a bit blurry, but that might be down to my setup or different shaders. Do you think it might look different because I'm on a 1440p monitor?

Also, what FS UAE basic video settings should I use to achieve proper aspect ratio and max screen size?

[kokoko3k]

Originally Posted by RuySan

By looking at the screenshots, they look pretty good, but i usually get paralysed with so many options. Do you know which one mostly resembles the image on a Commodore 1084 monitor?

I know there are a lot of knobs, that's why i made a lot of presets :-P

From what i remember on my old 1084s, i think you can try the non bloomed version:
http://wpage.unina.it/aorefice/share...ingjackson.png

http://wpage.unina.it/aorefice/share...d.vmask.shader


if there is still some white "bleeding" from the scanline that you don'like, you may try to change halo_h and/or in_glow_h

"#define halo_h     1.0" (and/or "#define halo_h     1.0")
to
"#define halo_h     2.0" (and/or "#define halo_h     2.0")
 (less is more here)

and/or lowering halo_power:

#define halo_power 2.0
to 
#define halo_power 1.5

Anyway, don't change them too much, because they help in keeping the image brighter on "common" lcd backlight levels.

[kokoko3k]

Originally Posted by dreadnought

Ok, that helped.

Interesting stuff, the shadowmask looks really good. Overall it's a bit blurry, but that might be down to my setup or different shaders. Do you think it might look different because I'm on a 1440p monitor?

Also, what FS UAE basic video settings should I use to achieve proper aspect ratio and max screen size?

Did you checked the screenshots related to the presets? do them look different from what you get on screen?
I use a 1080p and no particular settings, apart from the switch i wrote in the first post:
* line doubling enabled: line_doubling = 1
* low resolution disabled: low_resolution = 0


Also, i explicitely wrote the shader to look good with fs-uae autoscale feature (so that if you like scanlines they do not "dephase" too much)

[dreadnought]

Yeah, when compared to your example games they look the same. I was looking at Defender Of The Crown before, maybe that's why.

Like I said, I have very little experience with UAE emulators. I use them once in blue moon to quickly check something, but not play games, so I have never messed with gfx settings. So, I'm not sure how autoscale works, or how to achieve that proper-AR/maxed-out effect I mentioned (though it's a topic for another thread.)

I asked about 1080p vs 1440p because I think I've heard somewhere that CRT shaders might differ when used in different resolution, in regard to some other emu (Retroarch or MAME, not sure). Could be that I misread it though.

Overall, great job, I will probably use this config (scanlines/vmask one) when checking stuff out from now on, because I can't stomach the raw naked pixel look.

[kokoko3k]

Yep (nope), in this particular case, the more the pixels, the better results