1 files changed, 35 insertions, 0 deletions
diff --git a/third_party/rust/dwrote/src/rendering_params.rs b/third_party/rust/dwrote/src/rendering_params.rs
new file mode 100644
index 0000000000..977c38a34a
--- /dev/null
+++ b/third_party/rust/dwrote/src/rendering_params.rs
@@ -0,0 +1,35 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+use std::cell::UnsafeCell;
+use std::ptr;
+use winapi::um::dwrite::IDWriteRenderingParams;
+use wio::com::ComPtr;
+
+use super::DWriteFactory;
+
+pub struct RenderingParams {
+    native: UnsafeCell<ComPtr<IDWriteRenderingParams>>,
+}
+
+impl RenderingParams {
+    pub fn create_for_primary_monitor() -> RenderingParams {
+        unsafe {
+            let mut native: *mut IDWriteRenderingParams = ptr::null_mut();
+            let hr = (*DWriteFactory()).CreateRenderingParams(&mut native);
+            assert!(hr == 0);
+            RenderingParams::take(ComPtr::from_raw(native))
+        }
+    }
+
+    pub fn take(native: ComPtr<IDWriteRenderingParams>) -> RenderingParams {
+        RenderingParams {
+            native: UnsafeCell::new(native),
+        }
+    }
+
+    pub unsafe fn as_ptr(&self) -> *mut IDWriteRenderingParams {
+        (*self.native.get()).as_raw()
+    }
+}