Compare images in fitness function and benchmark them

compare.glsl

@@ -4,16 +4,16 @@
 
 // try isampler2D, ivec4 etc.? Probably not
 uniform vec2 size;
-uniform vec2 offs;
+// uniform vec2 offs;
 uniform sampler2D base;
 uniform sampler2D curr;
 
 void main(void)
 {
-	vec2 pos = (gl_FragCoord.xy-offs)/size;
-	pos.y = 1.0 - pos.y;
+	vec2 pos = gl_FragCoord.xy/size;
 	vec4 color = texture2D(curr, pos);
+	pos.y = 1.0 - pos.y;
 	vec4 basecolor = texture2D(base, pos);
-	color.xyz = abs(color.xyz - basecolor.xyz);
+	color.rgb = abs(color.rgb - basecolor.rgb);
 	gl_FragColor = color;
 }