51 lines
1.9 KiB
C
51 lines
1.9 KiB
C
/* jpeg-icc.h
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*
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* This code was originally proposed for the Independent JPEG Group's
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* software, but that fell through, and only recently got merged into
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* libjpeg-turbo. This code comes with the following copyright notice:
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*
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* Copyright (C) 1997-1998, Thomas G. Lane, Todd Newman.
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*
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* For conditions of distribution and use, see the accompanying
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* COPYING.ijg file.
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*/
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#ifndef __JPEG_ICC_H__
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#define __JPEG_ICC_H__
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void jpeg_icc_write_profile (j_compress_ptr cinfo,
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const guchar *icc_data_ptr,
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guint icc_data_len);
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/*
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* Reading a JPEG file that may contain an ICC profile requires two steps:
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*
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* 1. After jpeg_create_decompress() but before jpeg_read_header(),
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* ask the IJG library to save in memory any APP2 markers it may find
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* in the file.
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*
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* 2. After jpeg_read_header(), call jpeg_icc_read_profile() to find
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* out whether there was a profile and obtain it if so.
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*
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* See if there was an ICC profile in the JPEG file being read;
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* if so, reassemble and return the profile data.
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*
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* TRUE is returned if an ICC profile was found, FALSE if not.
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* If TRUE is returned, *icc_data_ptr is set to point to the
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* returned data, and *icc_data_len is set to its length.
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*
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* IMPORTANT: the data at **icc_data_ptr has been allocated with malloc()
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* and must be freed by the caller with free() when the caller no longer
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* needs it. (Alternatively, we could write this routine to use the
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* IJG library's memory allocator, so that the data would be freed implicitly
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* at jpeg_finish_decompress() time. But it seems likely that many apps
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* will prefer to have the data stick around after decompression finishes.)
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*/
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gboolean jpeg_icc_read_profile (j_decompress_ptr cinfo,
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guchar **icc_data_ptr,
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guint *icc_data_len);
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#endif /* __JPEG_ICC_H__ */
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