Merge #1444

1444: Fix shader versions to work on macOS r=kvark a=grtlr

The shader versions were changed in #1417.

examples/render/triangle/main.rs

@@ -71,8 +71,8 @@ pub fn main() {
     let views = swap_chain.create_color_views(&mut device);
 
     let pso = device.create_pipeline_simple(
-        include_bytes!("shader/triangle_120.glslv"),
-        include_bytes!("shader/triangle_120.glslf"),
+        include_bytes!("shader/triangle_150.glslv"),
+        include_bytes!("shader/triangle_150.glslf"),
         pipe::new()
     ).unwrap();
     let (vertex_buffer, slice) = device.create_vertex_buffer_with_slice(&TRIANGLE, ());

examples/render/triangle/shader/triangle_150.glslf

@@ -0,0 +1,8 @@
+#version 150 core
+
+in vec4 v_Color;
+out vec4 Target0;
+
+void main() {
+    Target0 = v_Color;
+}

examples/render/triangle/shader/triangle_120.glslv → examples/render/triangle/shader/triangle_150.glslv

@@ -1,10 +1,10 @@
-#version 120
+#version 150 core
 
-attribute vec2 a_Pos;
-attribute vec3 a_Color;
-varying vec4 v_Color;
+in vec2 a_Pos;
+in vec3 a_Color;
+out vec4 v_Color;
 
 void main() {
     v_Color = vec4(a_Color, 1.0);
     gl_Position = vec4(a_Pos, 0.0, 1.0);
-}
+}