The Tor Browser: image/decoders/iccjpeg.h@ac0c01689b40

Implement a real Private Browsing Mode condition by changing the API/ABI;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

     1 /* This Source Code Form is subject to the terms of the Mozilla Public

     2  * License, v. 2.0. If a copy of the MPL was not distributed with this

     3  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     5 /*

     6  * iccprofile.h

     7  *

     8  * This file provides code to read and write International Color Consortium

     9  * (ICC) device profiles embedded in JFIF JPEG image files.  The ICC has

    10  * defined a standard format for including such data in JPEG "APP2" markers.

    11  * The code given here does not know anything about the internal structure

    12  * of the ICC profile data; it just knows how to put the profile data into

    13  * a JPEG file being written, or get it back out when reading.

    14  *

    15  * This code depends on new features added to the IJG JPEG library as of

    16  * IJG release 6b; it will not compile or work with older IJG versions.

    17  *

    18  * NOTE: this code would need surgery to work on 16-bit-int machines

    19  * with ICC profiles exceeding 64K bytes in size.  See iccprofile.c

    20  * for details.

    21  */

    23 #include <stdio.h>		/* needed to define "FILE", "NULL" */

    24 #include "jpeglib.h"

    26 /*

    27  * Reading a JPEG file that may contain an ICC profile requires two steps:

    28  *

    29  * 1. After jpeg_create_decompress() but before jpeg_read_header(),

    30  *    call setup_read_icc_profile().  This routine tells the IJG library

    31  *    to save in memory any APP2 markers it may find in the file.

    32  *

    33  * 2. After jpeg_read_header(), call read_icc_profile() to find out

    34  *    whether there was a profile and obtain it if so.

    35  */

    38 /*

    39  * Prepare for reading an ICC profile

    40  */

    42 extern void setup_read_icc_profile JPP((j_decompress_ptr cinfo));

    45 /*

    46  * See if there was an ICC profile in the JPEG file being read;

    47  * if so, reassemble and return the profile data.

    48  *

    49  * TRUE is returned if an ICC profile was found, FALSE if not.

    50  * If TRUE is returned, *icc_data_ptr is set to point to the

    51  * returned data, and *icc_data_len is set to its length.

    52  *

    53  * IMPORTANT: the data at **icc_data_ptr has been allocated with malloc()

    54  * and must be freed by the caller with free() when the caller no longer

    55  * needs it.  (Alternatively, we could write this routine to use the

    56  * IJG library's memory allocator, so that the data would be freed implicitly

    57  * at jpeg_finish_decompress() time.  But it seems likely that many apps

    58  * will prefer to have the data stick around after decompression finishes.)

    59  */

    61 extern boolean read_icc_profile JPP((j_decompress_ptr cinfo,

    62 				     JOCTET **icc_data_ptr,

    63 				     unsigned int *icc_data_len));

The Tor Browser / file revision

image/decoders/iccjpeg.h@ac0c01689b40

image/decoders/iccjpeg.h