SuperTuxKart 1.5 upstream source (from official release tarball)

data/shaders/gaussian3v.frag

@@ -0,0 +1,22 @@
+uniform sampler2D tex;
+uniform vec2 pixel;
+
+// Gaussian separated blur with radius 3.
+
+out vec4 FragColor;
+
+void main()
+{
+    vec2 uv = gl_FragCoord.xy * pixel;
+    vec4 sum = vec4(0.0);
+    float X = uv.x;
+    float Y = uv.y;
+
+    sum += texture(tex, vec2(X, Y - 3.0 * pixel.y)) * 0.03125;
+    sum += texture(tex, vec2(X, Y - 1.3333 * pixel.y)) * 0.328125;
+    sum += texture(tex, vec2(X, Y)) * 0.273438;
+    sum += texture(tex, vec2(X, Y + 1.3333 * pixel.y)) * 0.328125;
+    sum += texture(tex, vec2(X, Y + 3.0 * pixel.y)) * 0.03125;
+
+    FragColor = sum;
+}