lets go

gui/gnome/autocustom-gnome-macos/res/extensions/blur-my-shell@aunetx/effects/monte_carlo_blur.glsl

@@ -0,0 +1,44 @@
+uniform sampler2D tex;
+uniform float radius;
+uniform int iterations;
+uniform float brightness;
+uniform float width;
+uniform float height;
+uniform bool use_base_pixel;
+
+float srand(vec2 a) {
+    return sin(dot(a, vec2(1233.224, 1743.335)));
+}
+
+float rand(inout float r) {
+    r = fract(3712.65 * r + 0.61432);
+    return (r - 0.5) * 2.0;
+}
+
+void main() {
+    vec2 uv = cogl_tex_coord0_in.st;
+    vec2 p = 16 * radius / vec2(width, height);
+    float r = srand(uv);
+    vec2 rv;
+
+    int count = 0;
+    vec4 c = vec4(0.);
+
+    for (int i = 0; i < iterations; i++) {
+        rv.x = rand(r);
+        rv.y = rand(r);
+        vec2 new_uv = uv + rv * p;
+        if (new_uv.x > 2. / width && new_uv.y > 2. / height && new_uv.x < 1. - 3. / width && new_uv.y < 1. - 3. / height) {
+            c += texture2D(tex, new_uv);
+            count += 1;
+        }
+    }
+
+    if (count == 0 || use_base_pixel) {
+        c += texture2D(tex, uv);
+        count += 1;
+    }
+
+    c.xyz *= brightness;
+    cogl_color_out = c / count;
+}