update resources

resources/shaders/140/gaussian_blur33.fs

@@ -0,0 +1,34 @@
+#version 140
+uniform sampler2D u_sampler;
+uniform mat3 u_convolution_matrix;
+uniform vec2 u_viewport_size;
+
+in vec2 tex_coords;
+
+out vec4 frag_color;
+
+vec4 sample(float offsetX, float offsetY)
+{
+    return texture(u_sampler, vec2(tex_coords.x + offsetX, tex_coords.y + offsetY));
+}
+void main()
+{
+    vec4 pixels[9];
+    float deltaWidth = 1.0 / u_viewport_size.x;
+    float deltaHeight = 1.0 / u_viewport_size.y;
+    pixels[0] = sample(-deltaWidth, deltaHeight );
+    pixels[1] = sample(0.0, deltaHeight );
+    pixels[2] = sample(deltaWidth, deltaHeight );
+    pixels[3] = sample(-deltaWidth, 0.0);
+    pixels[4] = sample(0.0, 0.0);
+    pixels[5] = sample(deltaWidth, 0.0);
+    pixels[6] = sample(-deltaWidth, -deltaHeight);
+    pixels[7] = sample(0.0, -deltaHeight);
+    pixels[8] = sample(deltaWidth, -deltaHeight);
+    vec4 accumulator = vec4(0.0);
+    for (int i = 0; i < 9; ++i)
+    {
+        accumulator += pixels[i] * u_convolution_matrix[i / 3][i % 3];
+    }
+    frag_color = accumulator;
+}