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diff --git a/third_party/jpeg-xl/lib/extras/dec/jxl.h b/third_party/jpeg-xl/lib/extras/dec/jxl.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_EXTRAS_DEC_JXL_H_
+#define LIB_EXTRAS_DEC_JXL_H_
+
+// Decodes JPEG XL images in memory.
+
+#include <jxl/parallel_runner.h>
+#include <jxl/types.h>
+#include <stdint.h>
+
+#include <limits>
+#include <string>
+#include <vector>
+
+#include "lib/extras/packed_image.h"
+
+namespace jxl {
+namespace extras {
+
+struct JXLDecompressParams {
+  // If empty, little endian float formats will be accepted.
+  std::vector<JxlPixelFormat> accepted_formats;
+
+  // Requested output color space description.
+  std::string color_space;
+  // If set, performs tone mapping to this intensity target luminance.
+  float display_nits = 0.0;
+  // Whether spot colors are rendered on the image.
+  bool render_spotcolors = true;
+  // Whether to keep or undo the orientation given in the header.
+  bool keep_orientation = false;
+
+  // If runner_opaque is set, the decoder uses this parallel runner.
+  JxlParallelRunner runner;
+  void* runner_opaque = nullptr;
+
+  // Whether truncated input should be treated as an error.
+  bool allow_partial_input = false;
+
+  // How many passes to decode at most. By default, decode everything.
+  uint32_t max_passes = std::numeric_limits<uint32_t>::max();
+
+  // Alternatively, one can specify the maximum tolerable downscaling factor
+  // with respect to the full size of the image. By default, nothing less than
+  // the full size is requested.
+  size_t max_downsampling = 1;
+
+  // Whether to use the image callback or the image buffer to get the output.
+  bool use_image_callback = true;
+  // Whether to unpremultiply colors for associated alpha channels.
+  bool unpremultiply_alpha = false;
+
+  // Controls the effective bit depth of the output pixels.
+  JxlBitDepth output_bitdepth = {JXL_BIT_DEPTH_FROM_PIXEL_FORMAT, 0, 0};
+};
+
+bool DecodeImageJXL(const uint8_t* bytes, size_t bytes_size,
+                    const JXLDecompressParams& dparams, size_t* decoded_bytes,
+                    PackedPixelFile* ppf,
+                    std::vector<uint8_t>* jpeg_bytes = nullptr);
+
+}  // namespace extras
+}  // namespace jxl
+
+#endif  // LIB_EXTRAS_DEC_JXL_H_