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Side by Side Diff: third_party/iccjpeg/iccjpeg.h

Issue 1441523002: Remove //third_party/iccjpeg. (Closed) Base URL: https://github.com/domokit/mojo.git@master
Patch Set: Created 5 years, 1 month ago
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1 /*
2 * iccprofile.h
3 *
4 * This file provides code to read and write International Color Consortium
5 * (ICC) device profiles embedded in JFIF JPEG image files. The ICC has
6 * defined a standard format for including such data in JPEG "APP2" markers.
7 * The code given here does not know anything about the internal structure
8 * of the ICC profile data; it just knows how to put the profile data into
9 * a JPEG file being written, or get it back out when reading.
10 *
11 * This code depends on new features added to the IJG JPEG library as of
12 * IJG release 6b; it will not compile or work with older IJG versions.
13 *
14 * NOTE: this code would need surgery to work on 16-bit-int machines
15 * with ICC profiles exceeding 64K bytes in size. See iccprofile.c
16 * for details.
17 */
18
19 #include <stdio.h> /* needed to define "FILE", "NULL" */
20
21 #if defined(USE_SYSTEM_LIBJPEG)
22 #include <jpeglib.h>
23 #else
24 #include "jpeglib.h"
25 #endif
26
27
28 /*
29 * This routine writes the given ICC profile data into a JPEG file.
30 * It *must* be called AFTER calling jpeg_start_compress() and BEFORE
31 * the first call to jpeg_write_scanlines().
32 * (This ordering ensures that the APP2 marker(s) will appear after the
33 * SOI and JFIF or Adobe markers, but before all else.)
34 */
35
36 extern void write_icc_profile JPP((j_compress_ptr cinfo,
37 const JOCTET *icc_data_ptr,
38 unsigned int icc_data_len));
39
40
41 /*
42 * Reading a JPEG file that may contain an ICC profile requires two steps:
43 *
44 * 1. After jpeg_create_decompress() but before jpeg_read_header(),
45 * call setup_read_icc_profile(). This routine tells the IJG library
46 * to save in memory any APP2 markers it may find in the file.
47 *
48 * 2. After jpeg_read_header(), call read_icc_profile() to find out
49 * whether there was a profile and obtain it if so.
50 */
51
52
53 /*
54 * Prepare for reading an ICC profile
55 */
56
57 extern void setup_read_icc_profile JPP((j_decompress_ptr cinfo));
58
59
60 /*
61 * See if there was an ICC profile in the JPEG file being read;
62 * if so, reassemble and return the profile data.
63 *
64 * TRUE is returned if an ICC profile was found, FALSE if not.
65 * If TRUE is returned, *icc_data_ptr is set to point to the
66 * returned data, and *icc_data_len is set to its length.
67 *
68 * IMPORTANT: the data at **icc_data_ptr has been allocated with malloc()
69 * and must be freed by the caller with free() when the caller no longer
70 * needs it. (Alternatively, we could write this routine to use the
71 * IJG library's memory allocator, so that the data would be freed implicitly
72 * at jpeg_finish_decompress() time. But it seems likely that many apps
73 * will prefer to have the data stick around after decompression finishes.)
74 */
75
76 extern boolean read_icc_profile JPP((j_decompress_ptr cinfo,
77 JOCTET **icc_data_ptr,
78 unsigned int *icc_data_len));
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