diff --git a/libs/hwui/Gainmap.cpp b/libs/hwui/Gainmap.cpp
new file mode 100644
index 0000000..30f401e
--- /dev/null
+++ b/libs/hwui/Gainmap.cpp
@@ -0,0 +1,32 @@
+/**
+ * Copyright (C) 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "Gainmap.h"
+
+namespace android::uirenderer {
+
+sp<Gainmap> Gainmap::allocateHardwareGainmap(const sp<Gainmap>& srcGainmap) {
+    auto gainmap = sp<Gainmap>::make();
+    gainmap->info = srcGainmap->info;
+    const SkBitmap skSrcBitmap = srcGainmap->bitmap->getSkBitmap();
+    sk_sp<Bitmap> skBitmap(Bitmap::allocateHardwareBitmap(skSrcBitmap));
+    if (!skBitmap.get()) {
+        return nullptr;
+    }
+    gainmap->bitmap = std::move(skBitmap);
+    return gainmap;
+}
+
+}  // namespace android::uirenderer
\ No newline at end of file