1 files changed, 31 insertions, 0 deletions
diff --git a/include/tools/UnitConversion.hxx b/include/tools/UnitConversion.hxx
new file mode 100644
index 000000000..e59077d8a
--- /dev/null
+++ b/include/tools/UnitConversion.hxx
@@ -0,0 +1,31 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * 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/.
+ *
+ */
+
+#pragma once
+
+constexpr sal_Int64 convertTwipToMm100(sal_Int64 n)
+{
+    return (n >= 0) ? (n * 127 + 36) / 72 : (n * 127 - 36) / 72;
+}
+
+constexpr sal_Int64 convertPointToMm100(sal_Int64 n) { return convertTwipToMm100(n * 20); }
+
+constexpr sal_Int64 convertMm100ToTwip(sal_Int64 n)
+{
+    return (n >= 0) ? (n * 72 + 63) / 127 : (n * 72 - 63) / 127;
+}
+
+// Convert PPT's "master unit" (1/576 inch) to twips
+constexpr sal_Int64 convertMasterUnitToTwip(sal_Int64 n) { return n * 2540.0 / 576.0; }
+
+// Convert twips to PPT's "master unit"
+constexpr sal_Int64 convertTwipToMasterUnit(sal_Int64 n) { return n / (2540.0 / 576.0); }
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */