diff --git a/libs/hwui/Tonemapper.h b/libs/hwui/Tonemapper.h
new file mode 100644
index 0000000..c0d5325
--- /dev/null
+++ b/libs/hwui/Tonemapper.h
@@ -0,0 +1,28 @@
+/*
+ * Copyright 2022 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.
+ */
+
+#pragma once
+
+#include <SkCanvas.h>
+
+namespace android::uirenderer {
+
+// Given a source and destination image info, and the max content luminance, generate a tonemaping
+// shader and tag it on the supplied paint.
+void tonemapPaint(const SkImageInfo& source, const SkImageInfo& destination, float maxLuminanceNits,
+                  SkPaint& paint);
+
+}  // namespace android::uirenderer