1 files changed, 22 insertions, 0 deletions
diff --git a/advanced_lighting/9.ssao/blur.frag b/advanced_lighting/9.ssao/blur.frag
new file mode 100644
index 0000000..dea23e8
--- /dev/null
+++ b/advanced_lighting/9.ssao/blur.frag
@@ -0,0 +1,22 @@
+#version 330 core
+
+in vert_t {
+	vec2 tex_coords;
+} vert;
+
+out float frag_color;
+
+uniform sampler2D ssao;
+
+void main()
+{
+	vec2 texel_size = 1.0 / vec2(textureSize(ssao, 0));
+	float result = 0.0;
+	for (int x = -2; x < 2; x++) {
+		for (int y = -2; y < 2; y++) {
+			vec2 offset = vec2(float(x), float(y)) * texel_size;
+			result += texture(ssao, vert.tex_coords + offset).r;
+		}
+	}
+	frag_color = result / (4.0 * 4.0);
+}