1 files changed, 70 insertions, 0 deletions
diff --git a/raveos-gnome-theme/theme-data/extensions/installed/blur-my-shell@aunetx/effects/gaussian_blur.glsl b/raveos-gnome-theme/theme-data/extensions/installed/blur-my-shell@aunetx/effects/gaussian_blur.glsl
new file mode 100644
index 0000000..809cc93
--- /dev/null
+++ b/raveos-gnome-theme/theme-data/extensions/installed/blur-my-shell@aunetx/effects/gaussian_blur.glsl
@@ -0,0 +1,70 @@
+uniform sampler2D tex;
+uniform float sigma;
+uniform int dir;
+uniform float brightness;
+uniform float width;
+uniform float height;
+
+vec4 getTexture(vec2 uv) {
+    if (uv.x < 3. / width)
+        uv.x = 3. / width;
+
+    if (uv.y < 3. / height)
+        uv.y = 3. / height;
+
+    if (uv.x > 1. - 3. / width)
+        uv.x = 1. - 3. / width;
+
+    if (uv.y > 1. - 3. / height)
+        uv.y = 1. - 3. / height;
+
+    return texture2D(tex, uv);
+}
+
+void main(void) {
+    vec2 uv = cogl_tex_coord_in[0].xy;
+    vec2 direction = vec2(dir, (1.0 - dir));
+
+    float pixel_step;
+    if (dir == 0)
+        pixel_step = 1.0 / height;
+    else
+        pixel_step = 1.0 / width;
+
+    vec3 gauss_coefficient;
+    gauss_coefficient.x = 1.0 / (sqrt(2.0 * 3.14159265) * sigma);
+    gauss_coefficient.y = exp(-0.5 / (sigma * sigma));
+    gauss_coefficient.z = gauss_coefficient.y * gauss_coefficient.y;
+
+    float gauss_coefficient_total = gauss_coefficient.x;
+
+    vec4 ret = getTexture(uv) * gauss_coefficient.x;
+    gauss_coefficient.xy *= gauss_coefficient.yz;
+
+    int n_steps = int(ceil(1.5 * sigma)) * 2;
+
+    for (int i = 1; i <= n_steps; i += 2) {
+        float coefficient_subtotal = gauss_coefficient.x;
+        gauss_coefficient.xy *= gauss_coefficient.yz;
+        coefficient_subtotal += gauss_coefficient.x;
+
+        float gauss_ratio = gauss_coefficient.x / coefficient_subtotal;
+
+        float foffset = float(i) + gauss_ratio;
+        vec2 offset = direction * foffset * pixel_step;
+
+        ret += getTexture(uv + offset) * coefficient_subtotal;
+        ret += getTexture(uv - offset) * coefficient_subtotal;
+
+        gauss_coefficient_total += 2.0 * coefficient_subtotal;
+        gauss_coefficient.xy *= gauss_coefficient.yz;
+    }
+    vec4 outColor = ret / gauss_coefficient_total;
+
+    // apply brightness on the second pass (dir==0 comes last)
+    if (dir == 0) {
+        outColor.rgb *= brightness;
+    }
+
+    cogl_color_out = outColor;
+}
+\ No newline at end of file