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diff --git a/third_party/jpeg-xl/lib/jxl/render_pipeline/stage_to_linear.h b/third_party/jpeg-xl/lib/jxl/render_pipeline/stage_to_linear.h
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+++ b/third_party/jpeg-xl/lib/jxl/render_pipeline/stage_to_linear.h
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+// Copyright (c) the JPEG XL Project Authors. All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+#ifndef LIB_JXL_RENDER_PIPELINE_STAGE_TO_LINEAR_H_
+#define LIB_JXL_RENDER_PIPELINE_STAGE_TO_LINEAR_H_
+
+#include "lib/jxl/dec_xyb.h"
+#include "lib/jxl/render_pipeline/render_pipeline_stage.h"
+
+namespace jxl {
+
+// Converts the color channels from `output_encoding_info.color_encoding` to
+// linear.
+std::unique_ptr<RenderPipelineStage> GetToLinearStage(
+    const OutputEncodingInfo& output_encoding_info);
+
+}  // namespace jxl
+
+#endif  // LIB_JXL_RENDER_PIPELINE_STAGE_TO_LINEAR_H_