/* jpeg-icc.h
 *
 * This code was originally proposed for the Independent JPEG Group's
 * software, but that fell through, and only recently got merged into
 * libjpeg-turbo. This code comes with the following copyright notice:
 *
 * Copyright (C) 1997-1998, Thomas G. Lane, Todd Newman.
 *
 * For conditions of distribution and use, see the accompanying
 * COPYING.ijg file.
 */

#ifndef __JPEG_ICC_H__
#define __JPEG_ICC_H__

void jpeg_icc_write_profile (j_compress_ptr  cinfo,
                             const guchar   *icc_data_ptr,
                             guint           icc_data_len);


/*
 * Reading a JPEG file that may contain an ICC profile requires two steps:
 *
 * 1. After jpeg_create_decompress() but before jpeg_read_header(),
 *    ask the IJG library to save in memory any APP2 markers it may find
 *    in the file.
 *
 * 2. After jpeg_read_header(), call jpeg_icc_read_profile() to find
 *    out whether there was a profile and obtain it if so.
 *
 * See if there was an ICC profile in the JPEG file being read;
 * if so, reassemble and return the profile data.
 *
 * TRUE is returned if an ICC profile was found, FALSE if not.
 * If TRUE is returned, *icc_data_ptr is set to point to the
 * returned data, and *icc_data_len is set to its length.
 *
 * IMPORTANT: the data at **icc_data_ptr has been allocated with malloc()
 * and must be freed by the caller with free() when the caller no longer
 * needs it.  (Alternatively, we could write this routine to use the
 * IJG library's memory allocator, so that the data would be freed implicitly
 * at jpeg_finish_decompress() time.  But it seems likely that many apps
 * will prefer to have the data stick around after decompression finishes.)
 */

gboolean jpeg_icc_read_profile (j_decompress_ptr   cinfo,
                                guchar           **icc_data_ptr,
                                guint             *icc_data_len);

#endif /* __JPEG_ICC_H__ */