xBR algorithm tutorial

RetroArch Additions Shaders
#29

Two more for tests:

Hybrid: http://pastebin.com/7mgmDPvi

CRT: http://pastebin.com/aBNLk9pb

Use the same config recommendations I made before.

This new hybrid is more clean than the last version (v4). Some comparison: http://minus.com/mbc77JLTpfZqQs

#30

Thanks Hyllian, once i have some time i shall test it.

#31

There’s another shader I’m working called ddt.cg.

Today I tweaked a bit and added gamma correction based on ideas from someone from other forum. I think the results are interesting.

Here’s a beta: http://pastebin.com/cJ9TPbHU

#32

And now a ddt+gamma using xBR edge detection: http://pastebin.com/pZwerMr0

#33

Added gamma correction to xBR:

https://github.com/libretro/common-shaders/tree/master/xBR

They’re the three files with “gamma” in the name.

#34

I just found an improved rule to detect corners. It gets the quality of C version without most of its artifacts.

I’m implementing in shader only: http://pastebin.com/QMR4De9a

#35

If the last version doesn’t work in your GPU, try this 3.7 modificated:

http://pastebin.com/iwX9u4eB

#36

It looks good on my AMD/ATI card. I’ll try it on Intel tomorrow.

#37

Have you noticed improvements over 3.7c? (ex.: Super Mario World coins).

#38

Added those two shaders to the repo:

https://github.com/libretro/common-shaders/blob/master/xBR/4xBR-v3.9.cg https://github.com/libretro/common-shaders/blob/master/xBR/5xBR-v3.7d.cg

#39

The first LEVEL3 xBR shader is done!

An example is the Megaman X2 ramp, with LEVEL3 4.0 it get rid of macro jaggies:

http://imgur.com/m9UfqQA

On the repo (4xBR-v4.0 and 5xBR-v4.0): https://github.com/libretro/common-shaders/commit/c428ad0b4f01b45f6c0d63840175b9d8a6ce29a5

#40

On my Radeon card, it’s getting some weird multicolor noise artifacts in the image: On the other hand, you can see from the inclined portion of the ground that it’s doing an amazing job of smoothing out those previously uncorrectable jaggies :open_mouth:

#41

Humm.

Could you try the 5xBR-v4.0-noblend? I think it’ll run ok in 5x scale.

Another thing, you can try the cg2xml from maister, it was updated recently.

#42

ah, yeah, the noblend version looks much better. It still has some minor issues (different from the picture i posted) but I’ll see if cg2xml fixes those.

#43

I would love to use some of these on Retroarch PS3. Alas when I try to download them and install them onto my PS3 they don’t work.

Maybe I don’t know how to download them right from the github?

Im a noobie to ALL of this.

If you could post a link with a .zip or pack to some of these, then that would be awesome. :slight_smile:

Wanting to try these on Retroarch PS3 -5xBR-v4.0-noblend -4xBR-v4.0.cg -4xBR-v3.9.cg -5xBR-v3.7d.cg

And any other new ones you would recommend. You mentioned that some of the new ones are better at corner detection? Any recommendations are appreciated as always. And thanks for your hard work.

Like I said, not sure if I’m downloading them wrong (installing them wrong). But when i download what I think I install it just doesn’t register with Retroarch PS3.

Or maybe they are not meant to work yet with this version?

In any case… if it simply a case of the stupids with me, maybe you could post a link with these files properly compiled for us dummies.haha

Thanx again! :slight_smile:

#44

RetroArch 0.9.9 (for all platforms) should be hopefully released by the end of this week.

I know that the PS3 port will be a total rewrite that will beef up the shader capabilities considerably - going from fixed 2-pass shaders to full 8-pass shaders setup through our CGP preset format.

#45

Here they are:

EDIT, fixed a bug. New file upload: http://s000.tinyupload.com/index.php?file_id=80067435116502163478

#46

[quote=“Hyllian”]

Here they are: https://anonfiles.com/file/a59429d630d244017473093fa6dbc4aa[/quote]

You rock! 5xBR-v3.7d.cg is my fav so far!

Some advice though?

On the genesis emulator, do you notice some slow down?

I tried this with X5 and the stock.cg but the emu slows down.

Any suggested combos?

I’ve been using the 5xBR filter on X4 with stock.cg.

Any suggestions for a good second shader on genesis?

AND does anyone think that this newest Retroarch 0.9.9 release will enhance performance for the gen emulator so that we can use bigger shaders on X5 without slowdown?

THanx again for all your knowledge!

#47

The stock shader does nothing, so it’s best to turn off Dual Shader to gain some speed. Try this, and use the resize option along custon aspect ratio to get the desired resolution. For example, for genesis i use:

viewport X: 1600 viewport Y: 1120

EDIT: To gain even more speed, before turning off Dual Shaders option, put scale factor at 1X. For some reason it works!

#48

I’ve fixed a little bug in the last shaders uploaded.

So, here’s the fix: http://s000.tinyupload.com/index.php?file_id=80067435116502163478

I’ve updated the repo.