Scanlines in Libretro AdvMAME and FBA

caver01

@Riverstorm said in Scanlines in Libretro AdvMAME and FBA:

Sorry I got to ask, I know integer scaling now but what is fractional scaling? ;)

It's just what I called not using integer scaling. When you don't bother to specify integer scaling, you are letting it scale to fill your display dimensions, and that is very likely some fractional magnification. It might be 1.5x, 3.2x--whatever.

My point was that I haven't yet tried DaveJ's update to the shader to improve vertical games on horizontal displays. If it looks OK, it may allow me to avoid using integer scaling (which I don't, but might need to if I want to improve the look of scanlines--but maybe the new shader works either way).

Riverstorm

@caver01 said in Scanlines in Libretro AdvMAME and FBA:

My point was that I haven't yet tried DaveJ's update to the shader to improve vertical games on horizontal displays. If it looks OK, it may allow me to avoid using integer scaling (which I don't, but might need to if I want to improve the look of scanlines--but maybe the new shader works either way).

Ah ok, that makes sense, a fitting terminology. I popped over there to say thanks for his work and asked if it will make it to the RetroPie Repo at some point. I can wait if it does unless of course it's doing something very different that I should grab it.

Dank asked if he could break out the shaders which I think I prefer vs. tweaking the files.

I don't really mind that it doesn't have scanlines. It's playing a video after all, so obscuring pixels edges with simulated CRT RGB triads isn't a big deal for me.

That's true...

Riverstorm

@caver01 said in [Scanlines in Libretro AdvMAME and FBA](/topic/834/scanlines-in-libretro-

Solar Quest and Star Castle are both vector games, so I use AdvanceMAME (can specify full resolution for nice, crisp vector lines).

One more question for you if that's ok. You're a fountain of knowledge my good sir! ;) How do you get full resolution for these vector games? I am using the overlay which I think was just part of the glass or background and not a generated image which looks really nice but I was just wondering what you tweak to make sure it's full resolution.

caver01

@Riverstorm said in Scanlines in Libretro AdvMAME and FBA:

One more question for you if that's ok. You're a fountain of knowledge my good sir! ;) How do you get full resolution for these vector games?

You need to look for these lines in your .rc file for the version of advancemame you are using. Edit both if you might use each, but let's say you are using 1.4. So edit advmame-1.4.rc and look for the lines that look like:

display_width 1280
display_height 1024
display_flicker 15
display_intensity 1.5
display_antialias yes
display_translucency yes
display_beam 1.2

These settings only affect vector games. I like them this way on my screen. The flicker is a nice effect and it's set light here. The beam seems to enlarge in one dimension only, so if you want thick beams, you can't really get them, but I like a little larger than 1 pixel. Intensity can go up to 3 which I like, but if you back it down a bit, the flicker is more visible as is the translucency.

If you haven't already done it, also set sound_latency 0.05. The default is ridiculously high and you can see/hear the delay, so set this to the minimum of 0.05.

Finally, make sure when you launch using the runcommand that you are using the full resolution of your display.

jretropie

Hi all,

I tried add the crt shader by using Floob's script. It shader then works on SNES, Sega, NeoGeo but not on any Mame emulator. Is there any trick to enable it on MAME?

dankcushions

@jretropie said in Scanlines in Libretro AdvMAME and FBA:

Hi all,

I tried add the crt shader by using Floob's script. It shader then works on SNES, Sega, NeoGeo but not on any Mame emulator. Is there any trick to enable it on MAME?

you have to be using a libretro mame emulator. use https://github.com/RetroPie/RetroPie-Setup/wiki/Runcommand to find out what you're using.

jretropie

@dankcushions Hi, I have tried Ir-fba-next, Ir-fba, Ir-mame2003. But none of them shows the shader.

dankcushions

@jretropie said in Scanlines in Libretro AdvMAME and FBA:

@dankcushions Hi, I have tried Ir-fba-next, Ir-fba, Ir-mame2003. But none of them shows the shader.

are they in the arcade folder? might be that the script hasn't been updated to use the new(ish) arcade or mame-libretro file paths. not sure. you could instead use the https://github.com/retropie/retropie-setup/wiki/Configuration-Editor

anyway, the shaders have been updated to the latest versions. here's some pretty screenshots:

crt-pi
alt text

crt-pi-curvature
alt text

crt-pi-vertical
alt text

crt-pi-curvature-vertical
alt text

reinstall retroarch via retropie-setup to get the new ones

jretropie

@dankcushions You are right. Placing ROMs in arcade folder. Shader does not work.

dankcushions

@jretropie said in Scanlines in Libretro AdvMAME and FBA:

@dankcushions You are right. Placing ROMs in arcade folder. Shader does not work.

hmm, one for @Floob i think!

Floob

@jretropie If you are using shaders (as opposed to overlays) when you install them via my tool you would need to add

video_shader = /opt/retropie/emulators/retroarch/shader/crt-pi.glslp
video_shader_enable = true

to the top of the file /opt/retropie/configs/arcade/retroarch.cfg

That would apply the shader to all games in the arcade folder.

jretropie

Does anyone knows why the shader has vertical color line when I connect to 32" 720p TV?

The shader works fine with smaller 22" 1080p computer LCD.

alt text

davej

@jretropie said in Scanlines in Libretro AdvMAME and FBA:

Does anyone knows why the shader has vertical color line when I connect to 32" 720p TV?

The shader works fine with smaller 22" 1080p computer LCD.

It looks like the shadow mask simulation in the shader is interfering with the dot pitch of your TV - TVs do image processing on input signals which might be making this worse as well. Try turning this off by changing the value of MASK_TYPE in the version of the crt-pi.glsl file you are using to be 0. You can try 2 as well but that is likely to give you red/green/blue colour bands instead of green/magenta ones.

It's worth me pointing out that the shader really needs about 4 vertical pixels to do even scan lines so you might get moire patterns on your 720p screen.

jretropie

I am looking at the file and can't find any variable call mask_type

shaders = "1"
shader0 = "shaders/crt-pi.glsl"
filter_linear0 = "true"
wrap_mode0 = "clamp_to_border"
mipmap_input0 = "false"
alias0 = ""
float_framebuffer0 = "false"
srgb_framebuffer0 = "false"

Floob

@jretropie Try

sudo nano /opt/retropie/emulators/retroarch/shader/shaders/crt-pi.glsl

davej

What Floob said, although as you're using a curved version of the shader you'll need to edit the corresponding glsl file. You can find which one by looking for the line that says something similar to:

shader0 = "shaders/crt-pi.glsl"

Riverstorm

@dankcushions said in Scanlines in Libretro AdvMAME and FBA:

anyway, the shaders have been updated to the latest versions. here's some pretty screenshots:

Those look amazing! I think the scanlines really add another level of genuineness.

Riverstorm

@caver01 said in Scanlines in Libretro AdvMAME and FBA:

@Riverstorm said in Scanlines in Libretro AdvMAME and FBA:

One more question for you if that's ok. You're a fountain of knowledge my good sir! ;) How do you get full resolution for these vector games?

You need to look for these lines in your .rc file for the version of advancemame you are using. Edit both if you might use each, but let's say you are using 1.4. So edit advmame-1.4.rc and look for the lines that look like:
display_width 1280
display_height 1024
display_flicker 15
display_intensity 1.5
display_antialias yes
display_translucency yes
display_beam 1.2
These settings only affect vector games. I like them this way on my screen. The flicker is a nice effect and it's set light here. The beam seems to enlarge in one dimension only, so if you want thick beams, you can't really get them, but I like a little larger than 1 pixel. Intensity can go up to 3 which I like, but if you back it down a bit, the flicker is more visible as is the translucency.

If you haven't already done it, also set sound_latency 0.05. The default is ridiculously high and you can see/hear the delay, so set this to the minimum of 0.05.

Finally, make sure when you launch using the runcommand that you are using the full resolution of your display.

Thanks Caver, I did a copy and paste as I do with several of your posts. I will be adding this in tonight to see how it looks!

jretropie

@Floob When I try 0 or 2 for the mask_type. the scanlines disappeared.

caver01

@Riverstorm said in Scanlines in Libretro AdvMAME and FBA:

Thanks Caver, I did a copy and paste as I do with several of your posts. I will be adding this in tonight to see how it looks!

Just be mindful that when you are messing with the AdvanceMAME .rc files, it doesn't like duplicate config entries. So, if you copy and past mine, you need to remove the ones that are there, or add a rom name in from of them like oldsetting/display_flicker 0. This example tells advancemame to use this config line with the game called "oldsetting" which of course there isn't one, so you can create commented lines in this manner. AdvanceMAME is very picky about its config file.