neercs/neercs/video/color.lolfx

-- GLSL.Vert --

#version 120

void main()
	{
	gl_Position=gl_Vertex;
	gl_TexCoord[0]=gl_MultiTexCoord0;
	}

-- GLSL.Frag --

#version 120

uniform sampler2D texture;
uniform vec2 screen_size;
uniform vec3 filter;
uniform vec3 color;
uniform float flash;

void main(void)
	{
	vec2 p=gl_FragCoord.xy/screen_size.xy;
	vec3 c=texture2D(texture,p).xyz;

	float a=(c.x+c.y+c.z)/3.0;
	c=mix(c,vec3(a),color.z);								// grayscale
	c*=filter;												// filter
	c*=color.x;												// brightness
	c=0.5+(c-0.5)*color.y;									// contrast
	c+=flash;												// flash

	gl_FragColor=vec4(c,1.0);
	}