1 files changed, 73 insertions, 0 deletions
diff --git a/third_party/rust/gfx-hal/src/command/clear.rs b/third_party/rust/gfx-hal/src/command/clear.rs
new file mode 100644
index 0000000000..b620e472de
--- /dev/null
+++ b/third_party/rust/gfx-hal/src/command/clear.rs
@@ -0,0 +1,73 @@
+use crate::pso;
+use std::fmt;
+
+/// A clear color union, which can be either `f32`, `i32`, or `u32`.
+#[repr(C)]
+#[derive(Clone, Copy)]
+pub union ClearColor {
+    /// `f32` variant
+    pub float32: [f32; 4],
+    /// `i32` variant
+    pub sint32: [i32; 4],
+    /// `u32` variant
+    pub uint32: [u32; 4],
+}
+
+impl fmt::Debug for ClearColor {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        writeln![f, "ClearColor"]
+    }
+}
+
+/// A combination of depth and stencil clear values.
+#[repr(C)]
+#[derive(Clone, Copy, Debug)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+pub struct ClearDepthStencil {
+    /// Depth value
+    pub depth: f32,
+    /// Stencil value
+    pub stencil: u32,
+}
+
+/// A set of clear values for a single attachment.
+///
+/// These are passed to a command buffer by
+/// [beginning a render pass][crate::command::CommandBuffer::begin_render_pass].
+#[repr(C)]
+#[derive(Clone, Copy)]
+pub union ClearValue {
+    /// Clear color
+    pub color: ClearColor,
+    /// Clear depth and stencil
+    pub depth_stencil: ClearDepthStencil,
+    _align: [u32; 4],
+}
+
+impl fmt::Debug for ClearValue {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        f.debug_struct("ClearValue")
+            .field("color", unsafe { &self.color.uint32 })
+            .field("depth_stencil", unsafe { &self.depth_stencil })
+            .finish()
+    }
+}
+
+/// Attachment clear description for the current subpass.
+#[derive(Clone, Copy, Debug)]
+pub enum AttachmentClear {
+    /// Clear color attachment.
+    Color {
+        /// Index inside the `SubpassDesc::colors` array.
+        index: usize,
+        /// Value to clear with.
+        value: ClearColor,
+    },
+    /// Clear depth-stencil attachment.
+    DepthStencil {
+        /// Depth value to clear with.
+        depth: Option<pso::DepthValue>,
+        /// Stencil value to clear with.
+        stencil: Option<pso::StencilValue>,
+    },
+}