glsl shader or fx shader that just does plain gamma/brightness? \ VOGONS

glsl shader or fx shader that just does plain gamma/brightness?

Topic actions

Post a reply

First post, by doorhenge

Posted on 2022-01-12, 13:24

doorhenge Offline

Rank Newbie

Rank: Newbie
Posts: 3
Joined: 2020-11-30, 15:57

Is there any such glsl shader or fx shader that can just allow me to just change the gamma brightness?
No crt or scan line stuff that slows everything down with it, I just wanna change the brightness.

If not, is there a dosbox fork somewhere that allows this?

Reply 1 of 2, by leileilol

Posted on 2022-01-12, 13:36

leileilol Offline

Rank l33t++

Rank: l33t++
Posts: 11798
Joined: 2006-12-16, 18:03

It's possible with a pow function in a fragment shader. GLSL code example (not a working shader in itself)

1	float gamma = 1.0;  // change this
2
3	gl_FragColor.r = pow(gl_FragColor.r, 1.0 / gamma);
4	gl_FragColor.g = pow(gl_FragColor.g, 1.0 / gamma);
5	gl_FragColor.b = pow(gl_FragColor.b, 1.0 / gamma);