1 files changed, 61 insertions, 0 deletions
diff --git a/bindgen/rust/src/ral.rs b/bindgen/rust/src/ral.rs
new file mode 100644
index 0000000..f9c44e4
--- /dev/null
+++ b/bindgen/rust/src/ral.rs
@@ -0,0 +1,61 @@
+//! Wrapper around the RAL code in celeritas-core
+
+use celeritas_sys::{
+    BufferHandle, GPU_Buffer, GPU_CmdEncoder, GPU_CmdEncoder_BeginRender, GPU_CmdEncoder_EndRender, GPU_GetDefaultEncoder
+};
+
+pub struct FrameRenderEncoder(*mut GPU_CmdEncoder);
+
+/// Holds a pointer into the raw `GPU_Renderpass`
+pub struct RenderPass(*mut celeritas_sys::GPU_Renderpass);
+
+impl FrameRenderEncoder {
+    pub fn new(renderpass: &RenderPass) -> Self {
+        let enc = unsafe {
+            let enc = GPU_GetDefaultEncoder();
+            GPU_CmdEncoder_BeginRender(enc, renderpass.0);
+            enc
+        };
+        FrameRenderEncoder(enc)
+    }
+}
+
+impl Drop for FrameRenderEncoder {
+    fn drop(&mut self) {
+        unsafe {
+            GPU_CmdEncoder_EndRender(self.0);
+        }
+    }
+}
+
+impl FrameRenderEncoder {
+    pub fn set_vertex_buffer(&self, buf: BufferHandle) {
+      // TODO: Get buffer ptr from handle
+      // TODO: assert that buffer type is vertex
+        todo!()
+    }
+    pub fn set_index_buffer(&self, buf: BufferHandle) {
+      // TODO: Get buffer ptr from handle
+      // TODO: assert that buffer type is index
+        todo!()
+    }
+}
+
+// --- types
+
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
+pub enum PrimitiveTopology {
+    Point,
+    Line,
+    Triangle,
+}
+impl From<celeritas_sys::PrimitiveTopology> for PrimitiveTopology {
+    fn from(value: celeritas_sys::PrimitiveTopology) -> Self {
+        match value {
+          celeritas_sys::PrimitiveTopology_PRIMITIVE_TOPOLOGY_POINT => PrimitiveTopology::Point,
+          celeritas_sys::PrimitiveTopology_PRIMITIVE_TOPOLOGY_LINE => PrimitiveTopology::Line,
+          celeritas_sys::PrimitiveTopology_PRIMITIVE_TOPOLOGY_TRIANGLE => PrimitiveTopology::Triangle,
+          _ => unreachable!("enum conversion should be infallible")
+        }
+    }
+}
+\ No newline at end of file