fs_menu_ps.txt
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fs_menu_ps.txt
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	#version 120
	uniform sampler2D screen;
	varying vec2 uv;

	const float blurStep = 0.001;
	const vec3 gray = vec3(0.50, 0.50, 0.50);
	const float desaturateLevel = 0.6;

	void main()
	{
	//Blur the pixel
	vec4 color = texture2D(screen, uv);
	color += texture2D(screen, uv + vec2(-blurStep, -blurStep));
	color += texture2D(screen, uv + vec2(0, -blurStep));
	color += texture2D(screen, uv + vec2(+blurStep, -blurStep));

	color += texture2D(screen, uv + vec2(-blurStep, 0));
	color += texture2D(screen, uv + vec2(+blurStep, 0));

	color += texture2D(screen, uv + vec2(-blurStep, +blurStep));
	color += texture2D(screen, uv + vec2(0, +blurStep));
	color += texture2D(screen, uv + vec2(+blurStep, +blurStep));
	color /= 9.0;

	//Desaturate the pixel
	color.rgb = mix(vec3(dot(gray, color.rgb)), color.rgb, desaturateLevel);

	gl_FragColor = color;
	}