Improve shader version selection

glow/src/program.rs

@@ -3,6 +3,7 @@ use glow::HasContext;
 pub unsafe fn create(
     gl: &glow::Context,
     shader_sources: &[(u32, &str)],
+    attributes: &[(u32, &str)],
 ) -> <glow::Context as HasContext>::Program {
     let program = gl.create_program().expect("Cannot create program");
 
@@ -25,6 +26,10 @@ pub unsafe fn create(
         shaders.push(shader);
     }
 
+    for (i, name) in attributes {
+        gl.bind_attrib_location(program, *i, name);
+    }
+
     gl.link_program(program);
     if !gl.get_program_link_status(program) {
         panic!("{}", gl.get_program_info_log(program));