607b668ff9
The primary purpose of this is to encourage adoption of libjpeg-turbo in downstream Windows projects that forbid the use of "deprecated" functions. libjpeg-turbo's usage of those functions was not actually unsafe, because: - libjpeg-turbo always checks the return value of fopen() and ensures that a NULL filename can never be passed to it. - libjpeg-turbo always checks the return value of getenv() and never passes a NULL argument to it. - The sprintf() calls in format_message() (jerror.c) could never overflow the destination string buffer or leave it unterminated as long as the buffer was at least JMSG_LENGTH_MAX bytes in length, as instructed. (Regardless, this commit replaces those calls with snprintf() calls.) - libjpeg-turbo never uses sscanf() to read strings or multi-byte character arrays. - Because ofb7d6e84d6a, wrjpgcom explicitly checks the bounds of the source and destination strings before calling strcat() and strcpy(). - libjpeg-turbo always ensures that the destination string is terminated when using strncpy(). (548490fe5emade this explicit.) Regarding thread safety: Technically speaking, getenv() is not thread-safe, because the returned pointer may be invalidated if another thread sets the same environment variable between the time that the first thread calls getenv() and the time that that thread uses the return value. In practice, however, this could only occur with libjpeg-turbo if: (1) A multithreaded calling application used the deprecated and undocumented TJFLAG_FORCEMMX/TJFLAG_FORCESSE/TJFLAG_FORCESSE2 flags in the TurboJPEG API or set one of the corresponding environment variables (which are only intended for testing purposes.) Since the TurboJPEG API library only ever passed string constants to putenv(), the only inherent risk (i.e. the only risk introduced by the library and not the calling application) was that the SIMD extensions may have read an incorrect value from one of the aforementioned environment variables. or (2) A multithreaded calling application modified the value of the JPEGMEM environment variable in one thread while another thread was reading the value of that environment variable (in the body of jpeg_create_compress() or jpeg_create_decompress().) Given that the libjpeg API provides a thread-safe way for applications to modify the default memory limit without using the JPEGMEM environment variable, direct modification of that environment variable by calling applications is not supported. Microsoft's implementation of getenv_s() does not claim to be thread-safe either, so this commit uses getenv_s() solely to mollify Visual Studio. New inline functions and macros (GETENV_S() and PUTENV_S) wrap getenv_s()/_putenv_s() when building for Visual Studio and getenv()/setenv() otherwise, but GETENV_S()/PUTENV_S() provide no advantages over getenv()/setenv() other than parameter validation. They are implemented solely for convenience. Technically speaking, strerror() is not thread-safe, because the returned pointer may be invalidated if another thread changes the locale and/or calls strerror() between the time that the first thread calls strerror() and the time that that thread uses the return value. In practice, however, this could only occur with libjpeg-turbo if a multithreaded calling application encountered a file I/O error in tjLoadImage() or tjSaveImage(). Since both of those functions immediately copy the string returned from strerror() into a thread-local buffer, the risk is minimal, and the worst case would involve an incorrect error string being reported to the calling application. Regardless, this commit uses strerror_s() in the TurboJPEG API library when building for Visual Studio. Note that strerror_r() could have been used on Un*x systems, but it would have been necessary to handle both the POSIX and GNU implementations of that function and perform widespread compatibility testing. Such is left as an exercise for another day. Fixes #568
744 lines
25 KiB
C
744 lines
25 KiB
C
/*
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* jpegtran.c
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*
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* This file was part of the Independent JPEG Group's software:
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* Copyright (C) 1995-2019, Thomas G. Lane, Guido Vollbeding.
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* libjpeg-turbo Modifications:
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* Copyright (C) 2010, 2014, 2017, 2019-2022, D. R. Commander.
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* For conditions of distribution and use, see the accompanying README.ijg
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* file.
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*
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* This file contains a command-line user interface for JPEG transcoding.
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* It is very similar to cjpeg.c, and partly to djpeg.c, but provides
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* lossless transcoding between different JPEG file formats. It also
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* provides some lossless and sort-of-lossless transformations of JPEG data.
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*/
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#ifdef _MSC_VER
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#define _CRT_SECURE_NO_DEPRECATE
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#endif
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#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
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#include "transupp.h" /* Support routines for jpegtran */
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#include "jversion.h" /* for version message */
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#include "jconfigint.h"
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#ifdef USE_CCOMMAND /* command-line reader for Macintosh */
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#ifdef __MWERKS__
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#include <SIOUX.h> /* Metrowerks needs this */
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#include <console.h> /* ... and this */
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#endif
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#ifdef THINK_C
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#include <console.h> /* Think declares it here */
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#endif
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#endif
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/*
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* Argument-parsing code.
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* The switch parser is designed to be useful with DOS-style command line
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* syntax, ie, intermixed switches and file names, where only the switches
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* to the left of a given file name affect processing of that file.
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* The main program in this file doesn't actually use this capability...
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*/
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static const char *progname; /* program name for error messages */
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static char *icc_filename; /* for -icc switch */
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JDIMENSION max_scans; /* for -maxscans switch */
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static char *outfilename; /* for -outfile switch */
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static char *dropfilename; /* for -drop switch */
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boolean report; /* for -report switch */
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boolean strict; /* for -strict switch */
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static JCOPY_OPTION copyoption; /* -copy switch */
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static jpeg_transform_info transformoption; /* image transformation options */
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LOCAL(void)
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usage(void)
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/* complain about bad command line */
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{
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fprintf(stderr, "usage: %s [switches] ", progname);
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#ifdef TWO_FILE_COMMANDLINE
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fprintf(stderr, "inputfile outputfile\n");
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#else
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fprintf(stderr, "[inputfile]\n");
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#endif
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fprintf(stderr, "Switches (names may be abbreviated):\n");
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fprintf(stderr, " -copy none Copy no extra markers from source file\n");
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fprintf(stderr, " -copy comments Copy only comment markers (default)\n");
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fprintf(stderr, " -copy icc Copy only ICC profile markers\n");
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fprintf(stderr, " -copy all Copy all extra markers\n");
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#ifdef ENTROPY_OPT_SUPPORTED
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fprintf(stderr, " -optimize Optimize Huffman table (smaller file, but slow compression)\n");
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#endif
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#ifdef C_PROGRESSIVE_SUPPORTED
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fprintf(stderr, " -progressive Create progressive JPEG file\n");
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#endif
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fprintf(stderr, "Switches for modifying the image:\n");
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#if TRANSFORMS_SUPPORTED
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fprintf(stderr, " -crop WxH+X+Y Crop to a rectangular region\n");
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fprintf(stderr, " -drop +X+Y filename Drop (insert) another image\n");
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fprintf(stderr, " -flip [horizontal|vertical] Mirror image (left-right or top-bottom)\n");
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fprintf(stderr, " -grayscale Reduce to grayscale (omit color data)\n");
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fprintf(stderr, " -perfect Fail if there is non-transformable edge blocks\n");
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fprintf(stderr, " -rotate [90|180|270] Rotate image (degrees clockwise)\n");
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#endif
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#if TRANSFORMS_SUPPORTED
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fprintf(stderr, " -transpose Transpose image\n");
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fprintf(stderr, " -transverse Transverse transpose image\n");
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fprintf(stderr, " -trim Drop non-transformable edge blocks\n");
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fprintf(stderr, " with -drop: Requantize drop file to match source file\n");
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fprintf(stderr, " -wipe WxH+X+Y Wipe (gray out) a rectangular region\n");
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#endif
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fprintf(stderr, "Switches for advanced users:\n");
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#ifdef C_ARITH_CODING_SUPPORTED
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fprintf(stderr, " -arithmetic Use arithmetic coding\n");
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#endif
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fprintf(stderr, " -icc FILE Embed ICC profile contained in FILE\n");
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fprintf(stderr, " -restart N Set restart interval in rows, or in blocks with B\n");
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fprintf(stderr, " -maxmemory N Maximum memory to use (in kbytes)\n");
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fprintf(stderr, " -maxscans N Maximum number of scans to allow in input file\n");
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fprintf(stderr, " -outfile name Specify name for output file\n");
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fprintf(stderr, " -report Report transformation progress\n");
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fprintf(stderr, " -strict Treat all warnings as fatal\n");
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fprintf(stderr, " -verbose or -debug Emit debug output\n");
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fprintf(stderr, " -version Print version information and exit\n");
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fprintf(stderr, "Switches for wizards:\n");
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#ifdef C_MULTISCAN_FILES_SUPPORTED
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fprintf(stderr, " -scans FILE Create multi-scan JPEG per script FILE\n");
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#endif
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exit(EXIT_FAILURE);
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}
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LOCAL(void)
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select_transform(JXFORM_CODE transform)
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/* Silly little routine to detect multiple transform options,
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* which we can't handle.
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*/
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{
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#if TRANSFORMS_SUPPORTED
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if (transformoption.transform == JXFORM_NONE ||
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transformoption.transform == transform) {
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transformoption.transform = transform;
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} else {
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fprintf(stderr, "%s: can only do one image transformation at a time\n",
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progname);
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usage();
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}
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#else
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fprintf(stderr, "%s: sorry, image transformation was not compiled\n",
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progname);
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exit(EXIT_FAILURE);
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#endif
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}
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LOCAL(int)
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parse_switches(j_compress_ptr cinfo, int argc, char **argv,
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int last_file_arg_seen, boolean for_real)
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/* Parse optional switches.
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* Returns argv[] index of first file-name argument (== argc if none).
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* Any file names with indexes <= last_file_arg_seen are ignored;
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* they have presumably been processed in a previous iteration.
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* (Pass 0 for last_file_arg_seen on the first or only iteration.)
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* for_real is FALSE on the first (dummy) pass; we may skip any expensive
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* processing.
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*/
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{
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int argn;
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char *arg;
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boolean simple_progressive;
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char *scansarg = NULL; /* saves -scans parm if any */
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/* Set up default JPEG parameters. */
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simple_progressive = FALSE;
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icc_filename = NULL;
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max_scans = 0;
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outfilename = NULL;
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report = FALSE;
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strict = FALSE;
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copyoption = JCOPYOPT_DEFAULT;
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transformoption.transform = JXFORM_NONE;
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transformoption.perfect = FALSE;
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transformoption.trim = FALSE;
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transformoption.force_grayscale = FALSE;
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transformoption.crop = FALSE;
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transformoption.slow_hflip = FALSE;
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cinfo->err->trace_level = 0;
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/* Scan command line options, adjust parameters */
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for (argn = 1; argn < argc; argn++) {
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arg = argv[argn];
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if (*arg != '-') {
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/* Not a switch, must be a file name argument */
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if (argn <= last_file_arg_seen) {
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outfilename = NULL; /* -outfile applies to just one input file */
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continue; /* ignore this name if previously processed */
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}
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break; /* else done parsing switches */
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}
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arg++; /* advance past switch marker character */
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if (keymatch(arg, "arithmetic", 1)) {
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/* Use arithmetic coding. */
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#ifdef C_ARITH_CODING_SUPPORTED
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cinfo->arith_code = TRUE;
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#else
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fprintf(stderr, "%s: sorry, arithmetic coding not supported\n",
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progname);
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exit(EXIT_FAILURE);
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#endif
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} else if (keymatch(arg, "copy", 2)) {
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/* Select which extra markers to copy. */
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if (++argn >= argc) /* advance to next argument */
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usage();
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if (keymatch(argv[argn], "none", 1)) {
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copyoption = JCOPYOPT_NONE;
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} else if (keymatch(argv[argn], "comments", 1)) {
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copyoption = JCOPYOPT_COMMENTS;
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} else if (keymatch(argv[argn], "icc", 1)) {
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copyoption = JCOPYOPT_ICC;
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} else if (keymatch(argv[argn], "all", 1)) {
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copyoption = JCOPYOPT_ALL;
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} else
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usage();
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} else if (keymatch(arg, "crop", 2)) {
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/* Perform lossless cropping. */
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#if TRANSFORMS_SUPPORTED
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if (++argn >= argc) /* advance to next argument */
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usage();
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if (transformoption.crop /* reject multiple crop/drop/wipe requests */ ||
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!jtransform_parse_crop_spec(&transformoption, argv[argn])) {
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fprintf(stderr, "%s: bogus -crop argument '%s'\n",
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progname, argv[argn]);
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exit(EXIT_FAILURE);
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}
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#else
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select_transform(JXFORM_NONE); /* force an error */
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#endif
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} else if (keymatch(arg, "drop", 2)) {
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#if TRANSFORMS_SUPPORTED
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if (++argn >= argc) /* advance to next argument */
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usage();
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if (transformoption.crop /* reject multiple crop/drop/wipe requests */ ||
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!jtransform_parse_crop_spec(&transformoption, argv[argn]) ||
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transformoption.crop_width_set != JCROP_UNSET ||
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transformoption.crop_height_set != JCROP_UNSET) {
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fprintf(stderr, "%s: bogus -drop argument '%s'\n",
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progname, argv[argn]);
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exit(EXIT_FAILURE);
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}
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if (++argn >= argc) /* advance to next argument */
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usage();
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dropfilename = argv[argn];
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select_transform(JXFORM_DROP);
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#else
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select_transform(JXFORM_NONE); /* force an error */
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#endif
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} else if (keymatch(arg, "debug", 1) || keymatch(arg, "verbose", 1)) {
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/* Enable debug printouts. */
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/* On first -d, print version identification */
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static boolean printed_version = FALSE;
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if (!printed_version) {
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fprintf(stderr, "%s version %s (build %s)\n",
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PACKAGE_NAME, VERSION, BUILD);
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fprintf(stderr, "%s\n\n", JCOPYRIGHT);
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fprintf(stderr, "Emulating The Independent JPEG Group's software, version %s\n\n",
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JVERSION);
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printed_version = TRUE;
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}
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cinfo->err->trace_level++;
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} else if (keymatch(arg, "version", 4)) {
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fprintf(stderr, "%s version %s (build %s)\n",
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PACKAGE_NAME, VERSION, BUILD);
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exit(EXIT_SUCCESS);
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} else if (keymatch(arg, "flip", 1)) {
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/* Mirror left-right or top-bottom. */
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if (++argn >= argc) /* advance to next argument */
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usage();
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if (keymatch(argv[argn], "horizontal", 1))
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select_transform(JXFORM_FLIP_H);
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else if (keymatch(argv[argn], "vertical", 1))
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select_transform(JXFORM_FLIP_V);
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else
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usage();
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} else if (keymatch(arg, "grayscale", 1) ||
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keymatch(arg, "greyscale", 1)) {
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/* Force to grayscale. */
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#if TRANSFORMS_SUPPORTED
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transformoption.force_grayscale = TRUE;
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#else
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select_transform(JXFORM_NONE); /* force an error */
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#endif
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} else if (keymatch(arg, "icc", 1)) {
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/* Set ICC filename. */
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if (++argn >= argc) /* advance to next argument */
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usage();
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icc_filename = argv[argn];
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} else if (keymatch(arg, "maxmemory", 3)) {
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/* Maximum memory in Kb (or Mb with 'm'). */
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long lval;
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char ch = 'x';
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if (++argn >= argc) /* advance to next argument */
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usage();
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if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
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usage();
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if (ch == 'm' || ch == 'M')
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lval *= 1000L;
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cinfo->mem->max_memory_to_use = lval * 1000L;
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} else if (keymatch(arg, "maxscans", 4)) {
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if (++argn >= argc) /* advance to next argument */
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usage();
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if (sscanf(argv[argn], "%u", &max_scans) != 1)
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usage();
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} else if (keymatch(arg, "optimize", 1) || keymatch(arg, "optimise", 1)) {
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/* Enable entropy parm optimization. */
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#ifdef ENTROPY_OPT_SUPPORTED
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cinfo->optimize_coding = TRUE;
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#else
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fprintf(stderr, "%s: sorry, entropy optimization was not compiled\n",
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progname);
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exit(EXIT_FAILURE);
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#endif
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} else if (keymatch(arg, "outfile", 4)) {
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/* Set output file name. */
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if (++argn >= argc) /* advance to next argument */
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usage();
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outfilename = argv[argn]; /* save it away for later use */
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} else if (keymatch(arg, "perfect", 2)) {
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/* Fail if there is any partial edge MCUs that the transform can't
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* handle. */
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transformoption.perfect = TRUE;
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} else if (keymatch(arg, "progressive", 2)) {
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/* Select simple progressive mode. */
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#ifdef C_PROGRESSIVE_SUPPORTED
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simple_progressive = TRUE;
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/* We must postpone execution until num_components is known. */
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#else
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fprintf(stderr, "%s: sorry, progressive output was not compiled\n",
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progname);
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exit(EXIT_FAILURE);
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#endif
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} else if (keymatch(arg, "report", 3)) {
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report = TRUE;
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} else if (keymatch(arg, "restart", 1)) {
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/* Restart interval in MCU rows (or in MCUs with 'b'). */
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long lval;
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char ch = 'x';
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if (++argn >= argc) /* advance to next argument */
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usage();
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if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
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usage();
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if (lval < 0 || lval > 65535L)
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usage();
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if (ch == 'b' || ch == 'B') {
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cinfo->restart_interval = (unsigned int)lval;
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cinfo->restart_in_rows = 0; /* else prior '-restart n' overrides me */
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} else {
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cinfo->restart_in_rows = (int)lval;
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/* restart_interval will be computed during startup */
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}
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} else if (keymatch(arg, "rotate", 2)) {
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/* Rotate 90, 180, or 270 degrees (measured clockwise). */
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if (++argn >= argc) /* advance to next argument */
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usage();
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if (keymatch(argv[argn], "90", 2))
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select_transform(JXFORM_ROT_90);
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else if (keymatch(argv[argn], "180", 3))
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select_transform(JXFORM_ROT_180);
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else if (keymatch(argv[argn], "270", 3))
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select_transform(JXFORM_ROT_270);
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else
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usage();
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} else if (keymatch(arg, "scans", 1)) {
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/* Set scan script. */
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#ifdef C_MULTISCAN_FILES_SUPPORTED
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if (++argn >= argc) /* advance to next argument */
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usage();
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scansarg = argv[argn];
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/* We must postpone reading the file in case -progressive appears. */
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#else
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fprintf(stderr, "%s: sorry, multi-scan output was not compiled\n",
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progname);
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exit(EXIT_FAILURE);
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#endif
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} else if (keymatch(arg, "strict", 2)) {
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strict = TRUE;
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} else if (keymatch(arg, "transpose", 1)) {
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/* Transpose (across UL-to-LR axis). */
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select_transform(JXFORM_TRANSPOSE);
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} else if (keymatch(arg, "transverse", 6)) {
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/* Transverse transpose (across UR-to-LL axis). */
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select_transform(JXFORM_TRANSVERSE);
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} else if (keymatch(arg, "trim", 3)) {
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/* Trim off any partial edge MCUs that the transform can't handle. */
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transformoption.trim = TRUE;
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} else if (keymatch(arg, "wipe", 1)) {
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#if TRANSFORMS_SUPPORTED
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if (++argn >= argc) /* advance to next argument */
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usage();
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if (transformoption.crop /* reject multiple crop/drop/wipe requests */ ||
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!jtransform_parse_crop_spec(&transformoption, argv[argn])) {
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fprintf(stderr, "%s: bogus -wipe argument '%s'\n",
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progname, argv[argn]);
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exit(EXIT_FAILURE);
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}
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select_transform(JXFORM_WIPE);
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#else
|
|
select_transform(JXFORM_NONE); /* force an error */
|
|
#endif
|
|
|
|
} else {
|
|
usage(); /* bogus switch */
|
|
}
|
|
}
|
|
|
|
/* Post-switch-scanning cleanup */
|
|
|
|
if (for_real) {
|
|
|
|
#ifdef C_PROGRESSIVE_SUPPORTED
|
|
if (simple_progressive) /* process -progressive; -scans can override */
|
|
jpeg_simple_progression(cinfo);
|
|
#endif
|
|
|
|
#ifdef C_MULTISCAN_FILES_SUPPORTED
|
|
if (scansarg != NULL) /* process -scans if it was present */
|
|
if (!read_scan_script(cinfo, scansarg))
|
|
usage();
|
|
#endif
|
|
}
|
|
|
|
return argn; /* return index of next arg (file name) */
|
|
}
|
|
|
|
|
|
METHODDEF(void)
|
|
my_emit_message(j_common_ptr cinfo, int msg_level)
|
|
{
|
|
if (msg_level < 0) {
|
|
/* Treat warning as fatal */
|
|
cinfo->err->error_exit(cinfo);
|
|
} else {
|
|
if (cinfo->err->trace_level >= msg_level)
|
|
cinfo->err->output_message(cinfo);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* The main program.
|
|
*/
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
struct jpeg_decompress_struct srcinfo;
|
|
#if TRANSFORMS_SUPPORTED
|
|
struct jpeg_decompress_struct dropinfo;
|
|
struct jpeg_error_mgr jdroperr;
|
|
FILE *drop_file;
|
|
#endif
|
|
struct jpeg_compress_struct dstinfo;
|
|
struct jpeg_error_mgr jsrcerr, jdsterr;
|
|
struct cdjpeg_progress_mgr src_progress, dst_progress;
|
|
jvirt_barray_ptr *src_coef_arrays;
|
|
jvirt_barray_ptr *dst_coef_arrays;
|
|
int file_index;
|
|
/* We assume all-in-memory processing and can therefore use only a
|
|
* single file pointer for sequential input and output operation.
|
|
*/
|
|
FILE *fp;
|
|
FILE *icc_file;
|
|
JOCTET *icc_profile = NULL;
|
|
long icc_len = 0;
|
|
|
|
/* On Mac, fetch a command line. */
|
|
#ifdef USE_CCOMMAND
|
|
argc = ccommand(&argv);
|
|
#endif
|
|
|
|
progname = argv[0];
|
|
if (progname == NULL || progname[0] == 0)
|
|
progname = "jpegtran"; /* in case C library doesn't provide it */
|
|
|
|
/* Initialize the JPEG decompression object with default error handling. */
|
|
srcinfo.err = jpeg_std_error(&jsrcerr);
|
|
jpeg_create_decompress(&srcinfo);
|
|
/* Initialize the JPEG compression object with default error handling. */
|
|
dstinfo.err = jpeg_std_error(&jdsterr);
|
|
jpeg_create_compress(&dstinfo);
|
|
|
|
/* Scan command line to find file names.
|
|
* It is convenient to use just one switch-parsing routine, but the switch
|
|
* values read here are mostly ignored; we will rescan the switches after
|
|
* opening the input file. Also note that most of the switches affect the
|
|
* destination JPEG object, so we parse into that and then copy over what
|
|
* needs to affect the source too.
|
|
*/
|
|
|
|
file_index = parse_switches(&dstinfo, argc, argv, 0, FALSE);
|
|
jsrcerr.trace_level = jdsterr.trace_level;
|
|
srcinfo.mem->max_memory_to_use = dstinfo.mem->max_memory_to_use;
|
|
|
|
if (strict)
|
|
jsrcerr.emit_message = my_emit_message;
|
|
|
|
#ifdef TWO_FILE_COMMANDLINE
|
|
/* Must have either -outfile switch or explicit output file name */
|
|
if (outfilename == NULL) {
|
|
if (file_index != argc - 2) {
|
|
fprintf(stderr, "%s: must name one input and one output file\n",
|
|
progname);
|
|
usage();
|
|
}
|
|
outfilename = argv[file_index + 1];
|
|
} else {
|
|
if (file_index != argc - 1) {
|
|
fprintf(stderr, "%s: must name one input and one output file\n",
|
|
progname);
|
|
usage();
|
|
}
|
|
}
|
|
#else
|
|
/* Unix style: expect zero or one file name */
|
|
if (file_index < argc - 1) {
|
|
fprintf(stderr, "%s: only one input file\n", progname);
|
|
usage();
|
|
}
|
|
#endif /* TWO_FILE_COMMANDLINE */
|
|
|
|
/* Open the input file. */
|
|
if (file_index < argc) {
|
|
if ((fp = fopen(argv[file_index], READ_BINARY)) == NULL) {
|
|
fprintf(stderr, "%s: can't open %s for reading\n", progname,
|
|
argv[file_index]);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
} else {
|
|
/* default input file is stdin */
|
|
fp = read_stdin();
|
|
}
|
|
|
|
if (icc_filename != NULL) {
|
|
if ((icc_file = fopen(icc_filename, READ_BINARY)) == NULL) {
|
|
fprintf(stderr, "%s: can't open %s\n", progname, icc_filename);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
if (fseek(icc_file, 0, SEEK_END) < 0 ||
|
|
(icc_len = ftell(icc_file)) < 1 ||
|
|
fseek(icc_file, 0, SEEK_SET) < 0) {
|
|
fprintf(stderr, "%s: can't determine size of %s\n", progname,
|
|
icc_filename);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
if ((icc_profile = (JOCTET *)malloc(icc_len)) == NULL) {
|
|
fprintf(stderr, "%s: can't allocate memory for ICC profile\n", progname);
|
|
fclose(icc_file);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
if (fread(icc_profile, icc_len, 1, icc_file) < 1) {
|
|
fprintf(stderr, "%s: can't read ICC profile from %s\n", progname,
|
|
icc_filename);
|
|
free(icc_profile);
|
|
fclose(icc_file);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
fclose(icc_file);
|
|
if (copyoption == JCOPYOPT_ALL)
|
|
copyoption = JCOPYOPT_ALL_EXCEPT_ICC;
|
|
if (copyoption == JCOPYOPT_ICC)
|
|
copyoption = JCOPYOPT_NONE;
|
|
}
|
|
|
|
if (report) {
|
|
start_progress_monitor((j_common_ptr)&dstinfo, &dst_progress);
|
|
dst_progress.report = report;
|
|
}
|
|
if (report || max_scans != 0) {
|
|
start_progress_monitor((j_common_ptr)&srcinfo, &src_progress);
|
|
src_progress.report = report;
|
|
src_progress.max_scans = max_scans;
|
|
}
|
|
#if TRANSFORMS_SUPPORTED
|
|
/* Open the drop file. */
|
|
if (dropfilename != NULL) {
|
|
if ((drop_file = fopen(dropfilename, READ_BINARY)) == NULL) {
|
|
fprintf(stderr, "%s: can't open %s for reading\n", progname,
|
|
dropfilename);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
dropinfo.err = jpeg_std_error(&jdroperr);
|
|
jpeg_create_decompress(&dropinfo);
|
|
jpeg_stdio_src(&dropinfo, drop_file);
|
|
} else {
|
|
drop_file = NULL;
|
|
}
|
|
#endif
|
|
|
|
/* Specify data source for decompression */
|
|
jpeg_stdio_src(&srcinfo, fp);
|
|
|
|
/* Enable saving of extra markers that we want to copy */
|
|
jcopy_markers_setup(&srcinfo, copyoption);
|
|
|
|
/* Read file header */
|
|
(void)jpeg_read_header(&srcinfo, TRUE);
|
|
|
|
#if TRANSFORMS_SUPPORTED
|
|
if (dropfilename != NULL) {
|
|
(void)jpeg_read_header(&dropinfo, TRUE);
|
|
transformoption.crop_width = dropinfo.image_width;
|
|
transformoption.crop_width_set = JCROP_POS;
|
|
transformoption.crop_height = dropinfo.image_height;
|
|
transformoption.crop_height_set = JCROP_POS;
|
|
transformoption.drop_ptr = &dropinfo;
|
|
}
|
|
#endif
|
|
|
|
/* Any space needed by a transform option must be requested before
|
|
* jpeg_read_coefficients so that memory allocation will be done right.
|
|
*/
|
|
#if TRANSFORMS_SUPPORTED
|
|
/* Fail right away if -perfect is given and transformation is not perfect.
|
|
*/
|
|
if (!jtransform_request_workspace(&srcinfo, &transformoption)) {
|
|
fprintf(stderr, "%s: transformation is not perfect\n", progname);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
#endif
|
|
|
|
/* Read source file as DCT coefficients */
|
|
src_coef_arrays = jpeg_read_coefficients(&srcinfo);
|
|
|
|
#if TRANSFORMS_SUPPORTED
|
|
if (dropfilename != NULL) {
|
|
transformoption.drop_coef_arrays = jpeg_read_coefficients(&dropinfo);
|
|
}
|
|
#endif
|
|
|
|
/* Initialize destination compression parameters from source values */
|
|
jpeg_copy_critical_parameters(&srcinfo, &dstinfo);
|
|
|
|
/* Adjust destination parameters if required by transform options;
|
|
* also find out which set of coefficient arrays will hold the output.
|
|
*/
|
|
#if TRANSFORMS_SUPPORTED
|
|
dst_coef_arrays = jtransform_adjust_parameters(&srcinfo, &dstinfo,
|
|
src_coef_arrays,
|
|
&transformoption);
|
|
#else
|
|
dst_coef_arrays = src_coef_arrays;
|
|
#endif
|
|
|
|
/* Close input file, if we opened it.
|
|
* Note: we assume that jpeg_read_coefficients consumed all input
|
|
* until JPEG_REACHED_EOI, and that jpeg_finish_decompress will
|
|
* only consume more while (!cinfo->inputctl->eoi_reached).
|
|
* We cannot call jpeg_finish_decompress here since we still need the
|
|
* virtual arrays allocated from the source object for processing.
|
|
*/
|
|
if (fp != stdin)
|
|
fclose(fp);
|
|
|
|
/* Open the output file. */
|
|
if (outfilename != NULL) {
|
|
if ((fp = fopen(outfilename, WRITE_BINARY)) == NULL) {
|
|
fprintf(stderr, "%s: can't open %s for writing\n", progname,
|
|
outfilename);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
} else {
|
|
/* default output file is stdout */
|
|
fp = write_stdout();
|
|
}
|
|
|
|
/* Adjust default compression parameters by re-parsing the options */
|
|
file_index = parse_switches(&dstinfo, argc, argv, 0, TRUE);
|
|
|
|
/* Specify data destination for compression */
|
|
jpeg_stdio_dest(&dstinfo, fp);
|
|
|
|
/* Start compressor (note no image data is actually written here) */
|
|
jpeg_write_coefficients(&dstinfo, dst_coef_arrays);
|
|
|
|
/* Copy to the output file any extra markers that we want to preserve */
|
|
jcopy_markers_execute(&srcinfo, &dstinfo, copyoption);
|
|
|
|
if (icc_profile != NULL)
|
|
jpeg_write_icc_profile(&dstinfo, icc_profile, (unsigned int)icc_len);
|
|
|
|
/* Execute image transformation, if any */
|
|
#if TRANSFORMS_SUPPORTED
|
|
jtransform_execute_transformation(&srcinfo, &dstinfo, src_coef_arrays,
|
|
&transformoption);
|
|
#endif
|
|
|
|
/* Finish compression and release memory */
|
|
jpeg_finish_compress(&dstinfo);
|
|
jpeg_destroy_compress(&dstinfo);
|
|
#if TRANSFORMS_SUPPORTED
|
|
if (dropfilename != NULL) {
|
|
(void)jpeg_finish_decompress(&dropinfo);
|
|
jpeg_destroy_decompress(&dropinfo);
|
|
}
|
|
#endif
|
|
(void)jpeg_finish_decompress(&srcinfo);
|
|
jpeg_destroy_decompress(&srcinfo);
|
|
|
|
/* Close output file, if we opened it */
|
|
if (fp != stdout)
|
|
fclose(fp);
|
|
#if TRANSFORMS_SUPPORTED
|
|
if (drop_file != NULL)
|
|
fclose(drop_file);
|
|
#endif
|
|
|
|
if (report)
|
|
end_progress_monitor((j_common_ptr)&dstinfo);
|
|
if (report || max_scans != 0)
|
|
end_progress_monitor((j_common_ptr)&srcinfo);
|
|
|
|
free(icc_profile);
|
|
|
|
/* All done. */
|
|
#if TRANSFORMS_SUPPORTED
|
|
if (dropfilename != NULL)
|
|
exit(jsrcerr.num_warnings + jdroperr.num_warnings +
|
|
jdsterr.num_warnings ? EXIT_WARNING : EXIT_SUCCESS);
|
|
#endif
|
|
exit(jsrcerr.num_warnings + jdsterr.num_warnings ?
|
|
EXIT_WARNING : EXIT_SUCCESS);
|
|
return 0; /* suppress no-return-value warnings */
|
|
}
|