Vendor dependencies for 0.3.0 release

vendor/metal/examples/mesh-shader/shaders.metal

@@ -0,0 +1,30 @@
+#include <metal_stdlib>
+
+using namespace metal;
+
+struct VertexOut {
+    float4 position [[position]];
+};
+
+using mesh_t = mesh<VertexOut, void, 3, 1, topology::triangle>;
+
+[[mesh]] void mesh_function(mesh_t m) {
+    VertexOut v;
+    v.position = float4(-1.0, -1.0, 0.0, 1.0);
+
+    m.set_primitive_count(1);
+
+    m.set_vertex(0, v);
+    v.position = float4(0.0, 1.0, 0.0, 1.0);
+    m.set_vertex(1, v);
+    v.position = float4(1.0, -1.0, 0.0, 1.0);
+    m.set_vertex(2, v);
+
+    m.set_index(0, 0);
+    m.set_index(1, 1);
+    m.set_index(2, 2);
+}
+
+fragment half4 fragment_function() {
+    return half4(0.1, 1.0, 0.1, 1.0);
+}