| /* |
| * iccprofile.h |
| * |
| * This file provides code to read and write International Color Consortium |
| * (ICC) device profiles embedded in JFIF JPEG image files. The ICC has |
| * defined a standard format for including such data in JPEG "APP2" markers. |
| * The code given here does not know anything about the internal structure |
| * of the ICC profile data; it just knows how to put the profile data into |
| * a JPEG file being written, or get it back out when reading. |
| * |
| * This code depends on new features added to the IJG JPEG library as of |
| * IJG release 6b; it will not compile or work with older IJG versions. |
| * |
| * NOTE: this code would need surgery to work on 16-bit-int machines |
| * with ICC profiles exceeding 64K bytes in size. See iccprofile.c |
| * for details. |
| */ |
| |
| #include <stdio.h> /* needed to define "FILE", "NULL" */ |
| #include "jpeglib.h" |
| |
| |
| /* |
| * This routine writes the given ICC profile data into a JPEG file. |
| * It *must* be called AFTER calling jpeg_start_compress() and BEFORE |
| * the first call to jpeg_write_scanlines(). |
| * (This ordering ensures that the APP2 marker(s) will appear after the |
| * SOI and JFIF or Adobe markers, but before all else.) |
| */ |
| |
| extern void write_icc_profile JPP((j_compress_ptr cinfo, |
| const JOCTET *icc_data_ptr, |
| unsigned int 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(), |
| * call setup_read_icc_profile(). This routine tells the IJG library |
| * to save in memory any APP2 markers it may find in the file. |
| * |
| * 2. After jpeg_read_header(), call read_icc_profile() to find out |
| * whether there was a profile and obtain it if so. |
| */ |
| |
| |
| /* |
| * Prepare for reading an ICC profile |
| */ |
| |
| extern void setup_read_icc_profile JPP((j_decompress_ptr cinfo)); |
| |
| |
| /* |
| * 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.) |
| */ |
| |
| extern boolean read_icc_profile JPP((j_decompress_ptr cinfo, |
| JOCTET **icc_data_ptr, |
| unsigned int *icc_data_len)); |