public static extern void sg_fail_shader(sg_shader shd_id);
public static extern void sg_init_shader(sg_shader shd_id, [In] ref sg_shader_desc desc);
public static extern sg_resource_state sg_query_shader_state(sg_shader shd);
public static extern sg_shader_info sg_query_shader_info(sg_shader shd);
public static extern void sg_destroy_shader(sg_shader shd);