init commit

shaders/blur2.fs

@@ -0,0 +1,31 @@
+#version 330
+
+in vec2 fragTexCoord;
+in vec4 fragColor;
+
+uniform sampler2D texture0;
+uniform vec4 colDiffuse;
+uniform vec2 resolution;
+uniform vec2 direction;   // (1,0) for horizontal pass, (0,1) for vertical pass
+
+out vec4 finalColor;
+
+void main()
+{
+    vec2 texel = direction / resolution;
+
+    // 9-tap Gaussian, weights from Pascal's-triangle-style approximation
+    const float weight[5] = float[](
+        0.227027, 0.1945946, 0.1216216, 0.054054, 0.016216
+    );
+
+    vec4 color = texture(texture0, fragTexCoord) * weight[0];
+
+    for (int i = 1; i < 4; i++) {
+        vec2 offset = texel * float(i);
+        color += texture(texture0, fragTexCoord + offset) * weight[i];
+        color += texture(texture0, fragTexCoord - offset) * weight[i];
+    }
+
+    finalColor = color * colDiffuse * fragColor * 1.8;
+}