Initial pipeline abstraction

Source/Render/Pipeline/DepthStencilState.rs

@@ -0,0 +1,21 @@
+use super::{CompareFunction, DepthBiasState, StencilState, TextureFormat};
+use serde::{Deserialize, Serialize};
+
+#[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
+pub struct DepthStencilState {
+    /// Format of the depth/stencil buffer, must be special depth format. Must match the the format
+    /// of the depth/stencil attachment in [`CommandEncoder::begin_render_pass`].
+    pub format: TextureFormat,
+
+    /// If disabled, depth will not be written to.
+    pub depth_write_enabled: bool,
+
+    /// Comparison function used to compare depth values in the depth test.
+    pub depth_compare: CompareFunction,
+
+    /// Stencil state.
+    pub stencil: StencilState,
+
+    /// Depth bias state.
+    pub bias: DepthBiasState,
+}