1 files changed, 10 insertions, 0 deletions
diff --git a/src/mbgl/shader/outline.vertex.glsl b/src/mbgl/shader/outline.vertex.glsl
new file mode 100644
index 0000000000..29c16e3ded
--- /dev/null
+++ b/src/mbgl/shader/outline.vertex.glsl
@@ -0,0 +1,10 @@
+attribute vec2 a_pos;
+uniform mat4 u_matrix;
+uniform vec2 u_world;
+
+varying vec2 v_pos;
+
+void main() {
+    gl_Position = u_matrix * vec4(a_pos, 0, 1);
+    v_pos = (gl_Position.xy + 1.0) / 2.0 * u_world;
+}