PICA: Align vertex attributes

src/common/alignment.h

@@ -0,0 +1,22 @@
+// This file is under the public domain.
+
+#pragma once
+
+#include <cstddef>
+#include <type_traits>
+
+namespace Common {
+
+template <typename T>
+constexpr T AlignUp(T value, size_t size) {
+    static_assert(std::is_unsigned<T>::value, "T must be an unsigned value.");
+    return static_cast<T>(value + (size - value % size) % size);
+}
+
+template <typename T>
+constexpr T AlignDown(T value, size_t size) {
+    static_assert(std::is_unsigned<T>::value, "T must be an unsigned value.");
+    return static_cast<T>(value - value % size);
+}
+
+} // namespace Common