1 files changed, 15 insertions, 0 deletions
diff --git a/src/mbgl/shader/gaussian.vertex.glsl b/src/mbgl/shader/gaussian.vertex.glsl
new file mode 100644
index 0000000000..26a8394204
--- /dev/null
+++ b/src/mbgl/shader/gaussian.vertex.glsl
@@ -0,0 +1,15 @@
+attribute vec2 a_pos;
+
+uniform mat4 u_matrix;
+uniform vec2 u_offset;
+
+varying vec2 v_coords[3];
+
+void main() {
+    gl_Position = u_matrix * vec4(a_pos, 0, 1);
+
+    vec2 tex = gl_Position.xy / 2.0 + 0.5;
+    v_coords[0] = tex;
+    v_coords[1] = tex + u_offset * 1.1824255238063563;
+    v_coords[2] = tex - u_offset * 1.1824255238063563;
+}