[D3D12] Bindless textures/samplers

src/xenia/base/hash.h

@@ -0,0 +1,30 @@
+/**
+ ******************************************************************************
+ * Xenia : Xbox 360 Emulator Research Project                                 *
+ ******************************************************************************
+ * Copyright 2020 Ben Vanik. All rights reserved.                             *
+ * Released under the BSD license - see LICENSE in the root for more details. *
+ ******************************************************************************
+ */
+
+#ifndef XENIA_BASE_HASH_H_
+#define XENIA_BASE_HASH_H_
+
+#include <cstddef>
+
+namespace xe {
+namespace hash {
+
+// For use in unordered_sets and unordered_maps (primarily multisets and
+// multimaps, with manual collision resolution), where the hash is calculated
+// externally (for instance, as XXH64), possibly requiring context data rather
+// than a pure function to calculate the hash
+template <typename Key>
+struct IdentityHasher {
+  size_t operator()(const Key& key) const { return static_cast<size_t>(key); }
+};
+
+}  // namespace hash
+}  // namespace xe
+
+#endif  // XENIA_BASE_HASH_H_