Shader test bench

Color Relookup.fs

vidvox-isf-files color glsl runnable fragment MIT

runnable fragment

Complete GLSL fragment shader. Stronghold runs it directly when the browser can compile it.

Code

uniform sampler2D inputImage;
uniform sampler2D lookupImage;
uniform float mix_amount;
precision mediump float;
/*{
	"CREDIT": "by VIDVOX",
	"ISFVSN": "2",
	"CATEGORIES": [
		"Glitch"
	],
	"INPUTS": [
		{
			"NAME": "inputImage",
			"TYPE": "image"
		},
		{
			"NAME": "lookupImage",
			"TYPE": "image"
		},
		{
			"NAME": "mix_amount",
			"TYPE": "float",
			"MIN": 0.0,
			"MAX": 1.0,
			"DEFAULT": 0.5
		}
	]
}*/

void main() {
	vec4 thisColor = IMG_THIS_PIXEL(inputImage);
	vec2 lookupCoord;
	lookupCoord.x = mix (thisColor.r, thisColor.g, mix_amount);
	lookupCoord.x = mix (lookupCoord.x, thisColor.b, mix_amount);
	lookupCoord.x = u_resolution.x * lookupCoord.x / 255.0;
	
	lookupCoord.y = mix (thisColor.r, thisColor.g, mix_amount);
	lookupCoord.y = mix (lookupCoord.y, thisColor.b, mix_amount);
	lookupCoord.y = u_resolution.y * lookupCoord.y / 255.0;
	
	gl_FragColor = texture2D(lookupImage, lookupCoord);
}

Code

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