Add CommandsListJoin

vulkano/src/command_buffer/cmd/join.rs

@@ -0,0 +1,38 @@
+// Copyright (c) 2016 The vulkano developers
+// Licensed under the Apache License, Version 2.0
+// <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT
+// license <LICENSE-MIT or http://opensource.org/licenses/MIT>,
+// at your option. All files in the project carrying such
+// notice may not be copied, modified, or distributed except
+// according to those terms.
+
+use command_buffer::CommandsList;
+use command_buffer::CommandsListSink;
+
+/// Wraps around two commands lists and joins them together in one list. 
+#[derive(Debug, Copy, Clone)]
+pub struct CommandsListJoin<A, B> where A: CommandsList, B: CommandsList {
+    // First commands list.
+    first: A,
+    // Second commands list.
+    second: B,
+}
+
+impl<A, B> CommandsListJoin<A, B> where A: CommandsList, B: CommandsList {
+    #[inline]
+    pub fn new(first: A, second: B) -> CommandsListJoin<A, B> {
+        CommandsListJoin {
+            first: first,
+            second: second,
+        }
+    }
+}
+
+unsafe impl<A, B> CommandsList for CommandsListJoin<A, B> where A: CommandsList, B: CommandsList {
+    #[inline]
+    fn append<'a>(&'a self, builder: &mut CommandsListSink<'a>) {
+        self.first.append(builder);
+        self.second.append(builder);
+    }
+}

vulkano/src/command_buffer/cmd/mod.rs

@@ -37,6 +37,7 @@ pub use self::draw::CmdDraw;
 pub use self::empty::{empty, EmptyCommandsList};
 pub use self::end_render_pass::CmdEndRenderPass;
 pub use self::fill_buffer::{CmdFillBuffer, CmdFillBufferError};
+pub use self::join::CommandsListJoin;
 pub use self::next_subpass::CmdNextSubpass;
 pub use self::push_constants::{CmdPushConstants, CmdPushConstantsError};
 pub use self::set_state::{CmdSetState};
@@ -55,6 +56,7 @@ mod empty;
 mod end_render_pass;
 //pub mod execute;      // TODO: reenable when the concept of a command buffer is well defined
 mod fill_buffer;
+mod join;
 mod next_subpass;
 mod push_constants;
 mod set_state;
@@ -197,6 +199,12 @@ pub unsafe trait CommandsList {
         CmdDraw::new(self, pipeline, dynamic, vertices, sets, push_constants)
     }
 
+    /// Appends another list at the end of this one.
+    #[inline]
+    fn join<L>(self, other: L) -> CommandsListJoin<Self, L> where Self: Sized, L: CommandsList {
+        CommandsListJoin::new(self, other)
+    }
+
     /// Appends this list of commands at the end of a command buffer in construction.
     ///
     /// The `CommandsListSink` typically represents a command buffer being constructed.