1 files changed, 18 insertions, 0 deletions
diff --git a/gfx/src/AppUnits.h b/gfx/src/AppUnits.h
new file mode 100644
index 0000000000..2b00ec7d56
--- /dev/null
+++ b/gfx/src/AppUnits.h
@@ -0,0 +1,18 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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/. */
+
+#ifndef mozilla_AppUnits_h
+#define mozilla_AppUnits_h
+
+#include <stdint.h>
+
+namespace mozilla {
+constexpr inline int32_t AppUnitsPerCSSPixel() { return 60; }
+constexpr inline int32_t AppUnitsPerCSSInch() {
+  return 96 * AppUnitsPerCSSPixel();
+}
+}  // namespace mozilla
+#endif /* _NS_APPUNITS_H_ */