-#LTVERSION = 0:1:0
-
-#lib_LTLIBRARIES = libgdcmijpeg8.la
-
-##CXXFLAGS = @CXXFLAGS@
+# JPEG 8 bits project
SET(libgdcmijpeg8_la_SOURCES
jcapimin.c
jcsample.c
jchuff.c
jcphuff.c
-jcdctmgr.c # where commented out till here
+jcdctmgr.c # were commented out till here
jfdctfst.c
jfdctflt.c
jfdctint.c
jerror.c
jmemmgr.c
jmemnobs.c
-# rdrle.c
)
-#libgdcmijpeg8includedir = $(includedir)
SET(libgdcmijpeg8include_HEADERS
jchuff.h
jconfig.h
jversion.h
)
-#EXTRA_DIST = \
-# jconfig.linux \
-# jconfig.vc
-
ADD_LIBRARY(gdcmijpeg8 ${libgdcmijpeg8_la_SOURCES})
#INSTALL_FILES(/include "\\.h$")
-#LTVERSION = 0:1:0
-
-#lib_LTLIBRARIES = libgdcmijpeg8.la
-
-##CXXFLAGS = @CXXFLAGS@
+# JPEG 8 bits project
SET(libgdcmijpeg8_la_SOURCES
jcapimin.c
jcsample.c
jchuff.c
jcphuff.c
-jcdctmgr.c # where commented out till here
+jcdctmgr.c # were commented out till here
jfdctfst.c
jfdctflt.c
jfdctint.c
jerror.c
jmemmgr.c
jmemnobs.c
-# rdrle.c
)
-#libgdcmijpeg8includedir = $(includedir)
SET(libgdcmijpeg8include_HEADERS
jchuff.h
jconfig.h
jversion.h
)
-#EXTRA_DIST = \
-# jconfig.linux \
-# jconfig.vc
-
ADD_LIBRARY(gdcmijpeg8 ${libgdcmijpeg8_la_SOURCES})
#INSTALL_FILES(/include "\\.h$")
+++ /dev/null
-/*
- * cderror.h
- *
- * Copyright (C) 1994-1997, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file defines the error and message codes for the cjpeg/djpeg
- * applications. These strings are not needed as part of the JPEG library
- * proper.
- * Edit this file to add new codes, or to translate the message strings to
- * some other language.
- */
-
-/*
- * To define the enum list of message codes, include this file without
- * defining macro JMESSAGE. To create a message string table, include it
- * again with a suitable JMESSAGE definition (see jerror.c for an example).
- */
-#ifndef JMESSAGE
-#ifndef CDERROR_H
-#define CDERROR_H
-/* First time through, define the enum list */
-#define JMAKE_ENUM_LIST
-#else
-/* Repeated inclusions of this file are no-ops unless JMESSAGE is defined */
-#define JMESSAGE(code,string)
-#endif /* CDERROR_H */
-#endif /* JMESSAGE */
-
-#ifdef JMAKE_ENUM_LIST
-
-typedef enum {
-
-#define JMESSAGE(code,string) code ,
-
-#endif /* JMAKE_ENUM_LIST */
-
-JMESSAGE(JMSG_FIRSTADDONCODE=1000, NULL) /* Must be first entry! */
-
-#ifdef BMP_SUPPORTED
-JMESSAGE(JERR_BMP_BADCMAP, "Unsupported BMP colormap format")
-JMESSAGE(JERR_BMP_BADDEPTH, "Only 8- and 24-bit BMP files are supported")
-JMESSAGE(JERR_BMP_BADHEADER, "Invalid BMP file: bad header length")
-JMESSAGE(JERR_BMP_BADPLANES, "Invalid BMP file: biPlanes not equal to 1")
-JMESSAGE(JERR_BMP_COLORSPACE, "BMP output must be grayscale or RGB")
-JMESSAGE(JERR_BMP_COMPRESSED, "Sorry, compressed BMPs not yet supported")
-JMESSAGE(JERR_BMP_NOT, "Not a BMP file - does not start with BM")
-JMESSAGE(JTRC_BMP, "%ux%u 24-bit BMP image")
-JMESSAGE(JTRC_BMP_MAPPED, "%ux%u 8-bit colormapped BMP image")
-JMESSAGE(JTRC_BMP_OS2, "%ux%u 24-bit OS2 BMP image")
-JMESSAGE(JTRC_BMP_OS2_MAPPED, "%ux%u 8-bit colormapped OS2 BMP image")
-#endif /* BMP_SUPPORTED */
-
-#ifdef GIF_SUPPORTED
-JMESSAGE(JERR_GIF_BUG, "GIF output got confused")
-JMESSAGE(JERR_GIF_CODESIZE, "Bogus GIF codesize %d")
-JMESSAGE(JERR_GIF_COLORSPACE, "GIF output must be grayscale or RGB")
-JMESSAGE(JERR_GIF_IMAGENOTFOUND, "Too few images in GIF file")
-JMESSAGE(JERR_GIF_NOT, "Not a GIF file")
-JMESSAGE(JTRC_GIF, "%ux%ux%d GIF image")
-JMESSAGE(JTRC_GIF_BADVERSION,
- "Warning: unexpected GIF version number '%c%c%c'")
-JMESSAGE(JTRC_GIF_EXTENSION, "Ignoring GIF extension block of type 0x%02x")
-JMESSAGE(JTRC_GIF_NONSQUARE, "Caution: nonsquare pixels in input")
-JMESSAGE(JWRN_GIF_BADDATA, "Corrupt data in GIF file")
-JMESSAGE(JWRN_GIF_CHAR, "Bogus char 0x%02x in GIF file, ignoring")
-JMESSAGE(JWRN_GIF_ENDCODE, "Premature end of GIF image")
-JMESSAGE(JWRN_GIF_NOMOREDATA, "Ran out of GIF bits")
-#endif /* GIF_SUPPORTED */
-
-#ifdef PPM_SUPPORTED
-JMESSAGE(JERR_PPM_COLORSPACE, "PPM output must be grayscale or RGB")
-JMESSAGE(JERR_PPM_NONNUMERIC, "Nonnumeric data in PPM file")
-JMESSAGE(JERR_PPM_NOT, "Not a PPM/PGM file")
-JMESSAGE(JTRC_PGM, "%ux%u PGM image")
-JMESSAGE(JTRC_PGM_TEXT, "%ux%u text PGM image")
-JMESSAGE(JTRC_PPM, "%ux%u PPM image")
-JMESSAGE(JTRC_PPM_TEXT, "%ux%u text PPM image")
-#endif /* PPM_SUPPORTED */
-
-#ifdef RLE_SUPPORTED
-JMESSAGE(JERR_RLE_BADERROR, "Bogus error code from RLE library")
-JMESSAGE(JERR_RLE_COLORSPACE, "RLE output must be grayscale or RGB")
-JMESSAGE(JERR_RLE_DIMENSIONS, "Image dimensions (%ux%u) too large for RLE")
-JMESSAGE(JERR_RLE_EMPTY, "Empty RLE file")
-JMESSAGE(JERR_RLE_EOF, "Premature EOF in RLE header")
-JMESSAGE(JERR_RLE_MEM, "Insufficient memory for RLE header")
-JMESSAGE(JERR_RLE_NOT, "Not an RLE file")
-JMESSAGE(JERR_RLE_TOOMANYCHANNELS, "Cannot handle %d output channels for RLE")
-JMESSAGE(JERR_RLE_UNSUPPORTED, "Cannot handle this RLE setup")
-JMESSAGE(JTRC_RLE, "%ux%u full-color RLE file")
-JMESSAGE(JTRC_RLE_FULLMAP, "%ux%u full-color RLE file with map of length %d")
-JMESSAGE(JTRC_RLE_GRAY, "%ux%u grayscale RLE file")
-JMESSAGE(JTRC_RLE_MAPGRAY, "%ux%u grayscale RLE file with map of length %d")
-JMESSAGE(JTRC_RLE_MAPPED, "%ux%u colormapped RLE file with map of length %d")
-#endif /* RLE_SUPPORTED */
-
-#ifdef TARGA_SUPPORTED
-JMESSAGE(JERR_TGA_BADCMAP, "Unsupported Targa colormap format")
-JMESSAGE(JERR_TGA_BADPARMS, "Invalid or unsupported Targa file")
-JMESSAGE(JERR_TGA_COLORSPACE, "Targa output must be grayscale or RGB")
-JMESSAGE(JTRC_TGA, "%ux%u RGB Targa image")
-JMESSAGE(JTRC_TGA_GRAY, "%ux%u grayscale Targa image")
-JMESSAGE(JTRC_TGA_MAPPED, "%ux%u colormapped Targa image")
-#else
-JMESSAGE(JERR_TGA_NOTCOMP, "Targa support was not compiled")
-#endif /* TARGA_SUPPORTED */
-
-JMESSAGE(JERR_BAD_CMAP_FILE,
- "Color map file is invalid or of unsupported format")
-JMESSAGE(JERR_TOO_MANY_COLORS,
- "Output file format cannot handle %d colormap entries")
-JMESSAGE(JERR_UNGETC_FAILED, "ungetc failed")
-#ifdef TARGA_SUPPORTED
-JMESSAGE(JERR_UNKNOWN_FORMAT,
- "Unrecognized input file format --- perhaps you need -targa")
-#else
-JMESSAGE(JERR_UNKNOWN_FORMAT, "Unrecognized input file format")
-#endif
-JMESSAGE(JERR_UNSUPPORTED_FORMAT, "Unsupported output file format")
-
-#ifdef JMAKE_ENUM_LIST
-
- JMSG_LASTADDONCODE
-} ADDON_MESSAGE_CODE;
-
-#undef JMAKE_ENUM_LIST
-#endif /* JMAKE_ENUM_LIST */
-
-/* Zap JMESSAGE macro so that future re-inclusions do nothing by default */
-#undef JMESSAGE
+++ /dev/null
-/*
- * cdjpeg.c
- *
- * Copyright (C) 1991-1997, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains common support routines used by the IJG application
- * programs (cjpeg, djpeg, jpegtran).
- */
-
-#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
-#include <ctype.h> /* to declare isupper(), tolower() */
-#ifdef NEED_SIGNAL_CATCHER
-#include <signal.h> /* to declare signal() */
-#endif
-#ifdef USE_SETMODE
-#include <fcntl.h> /* to declare setmode()'s parameter macros */
-/* If you have setmode() but not <io.h>, just delete this line: */
-#include <io.h> /* to declare setmode() */
-#endif
-
-
-/*
- * Signal catcher to ensure that temporary files are removed before aborting.
- * NB: for Amiga Manx C this is actually a global routine named _abort();
- * we put "#define signal_catcher _abort" in jconfig.h. Talk about bogus...
- */
-
-#ifdef NEED_SIGNAL_CATCHER
-
-static j_common_ptr sig_cinfo;
-
-void /* must be global for Manx C */
-signal_catcher (int signum)
-{
- if (sig_cinfo != NULL) {
- if (sig_cinfo->err != NULL) /* turn off trace output */
- sig_cinfo->err->trace_level = 0;
- jpeg_destroy(sig_cinfo); /* clean up memory allocation & temp files */
- }
- exit(EXIT_FAILURE);
-}
-
-
-GLOBAL(void)
-enable_signal_catcher (j_common_ptr cinfo)
-{
- sig_cinfo = cinfo;
-#ifdef SIGINT /* not all systems have SIGINT */
- signal(SIGINT, signal_catcher);
-#endif
-#ifdef SIGTERM /* not all systems have SIGTERM */
- signal(SIGTERM, signal_catcher);
-#endif
-}
-
-#endif
-
-
-/*
- * Optional progress monitor: display a percent-done figure on stderr.
- */
-
-#ifdef PROGRESS_REPORT
-
-METHODDEF(void)
-progress_monitor (j_common_ptr cinfo)
-{
- cd_progress_ptr prog = (cd_progress_ptr) cinfo->progress;
- int total_passes = prog->pub.total_passes + prog->total_extra_passes;
- int percent_done = (int) (prog->pub.pass_counter*100L/prog->pub.pass_limit);
-
- if (percent_done != prog->percent_done) {
- prog->percent_done = percent_done;
- if (total_passes > 1) {
- fprintf(stderr, "\rPass %d/%d: %3d%% ",
- prog->pub.completed_passes + prog->completed_extra_passes + 1,
- total_passes, percent_done);
- } else {
- fprintf(stderr, "\r %3d%% ", percent_done);
- }
- fflush(stderr);
- }
-}
-
-
-GLOBAL(void)
-start_progress_monitor (j_common_ptr cinfo, cd_progress_ptr progress)
-{
- /* Enable progress display, unless trace output is on */
- if (cinfo->err->trace_level == 0) {
- progress->pub.progress_monitor = progress_monitor;
- progress->completed_extra_passes = 0;
- progress->total_extra_passes = 0;
- progress->percent_done = -1;
- cinfo->progress = &progress->pub;
- }
-}
-
-
-GLOBAL(void)
-end_progress_monitor (j_common_ptr cinfo)
-{
- /* Clear away progress display */
- if (cinfo->err->trace_level == 0) {
- fprintf(stderr, "\r \r");
- fflush(stderr);
- }
-}
-
-#endif
-
-
-/*
- * Case-insensitive matching of possibly-abbreviated keyword switches.
- * keyword is the constant keyword (must be lower case already),
- * minchars is length of minimum legal abbreviation.
- */
-
-GLOBAL(boolean)
-keymatch (char * arg, const char * keyword, int minchars)
-{
- register int ca, ck;
- register int nmatched = 0;
-
- while ((ca = *arg++) != '\0') {
- if ((ck = *keyword++) == '\0')
- return FALSE; /* arg longer than keyword, no good */
- if (isupper(ca)) /* force arg to lcase (assume ck is already) */
- ca = tolower(ca);
- if (ca != ck)
- return FALSE; /* no good */
- nmatched++; /* count matched characters */
- }
- /* reached end of argument; fail if it's too short for unique abbrev */
- if (nmatched < minchars)
- return FALSE;
- return TRUE; /* A-OK */
-}
-
-
-/*
- * Routines to establish binary I/O mode for stdin and stdout.
- * Non-Unix systems often require some hacking to get out of text mode.
- */
-
-GLOBAL(FILE *)
-read_stdin (void)
-{
- FILE * input_file = stdin;
-
-#ifdef USE_SETMODE /* need to hack file mode? */
- setmode(fileno(stdin), O_BINARY);
-#endif
-#ifdef USE_FDOPEN /* need to re-open in binary mode? */
- if ((input_file = fdopen(fileno(stdin), READ_BINARY)) == NULL) {
- fprintf(stderr, "Cannot reopen stdin\n");
- exit(EXIT_FAILURE);
- }
-#endif
- return input_file;
-}
-
-
-GLOBAL(FILE *)
-write_stdout (void)
-{
- FILE * output_file = stdout;
-
-#ifdef USE_SETMODE /* need to hack file mode? */
- setmode(fileno(stdout), O_BINARY);
-#endif
-#ifdef USE_FDOPEN /* need to re-open in binary mode? */
- if ((output_file = fdopen(fileno(stdout), WRITE_BINARY)) == NULL) {
- fprintf(stderr, "Cannot reopen stdout\n");
- exit(EXIT_FAILURE);
- }
-#endif
- return output_file;
-}
+++ /dev/null
-/*
- * cdjpeg.h
- *
- * Copyright (C) 1994-1997, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains common declarations for the sample applications
- * cjpeg and djpeg. It is NOT used by the core JPEG library.
- */
-
-#define JPEG_CJPEG_DJPEG /* define proper options in jconfig.h */
-#define JPEG_INTERNAL_OPTIONS /* cjpeg.c,djpeg.c need to see xxx_SUPPORTED */
-#include "jinclude.h"
-#include "jpeglib.h"
-#include "jerror.h" /* get library error codes too */
-#include "cderror.h" /* get application-specific error codes */
-
-
-/*
- * Object interface for cjpeg's source file decoding modules
- */
-
-typedef struct cjpeg_source_struct * cjpeg_source_ptr;
-
-struct cjpeg_source_struct {
- JMETHOD(void, start_input, (j_compress_ptr cinfo,
- cjpeg_source_ptr sinfo));
- JMETHOD(JDIMENSION, get_pixel_rows, (j_compress_ptr cinfo,
- cjpeg_source_ptr sinfo));
- JMETHOD(void, finish_input, (j_compress_ptr cinfo,
- cjpeg_source_ptr sinfo));
-
- FILE *input_file;
-
- JSAMPARRAY buffer;
- JDIMENSION buffer_height;
-};
-
-
-/*
- * Object interface for djpeg's output file encoding modules
- */
-
-typedef struct djpeg_dest_struct * djpeg_dest_ptr;
-
-struct djpeg_dest_struct {
- /* start_output is called after jpeg_start_decompress finishes.
- * The color map will be ready at this time, if one is needed.
- */
- JMETHOD(void, start_output, (j_decompress_ptr cinfo,
- djpeg_dest_ptr dinfo));
- /* Emit the specified number of pixel rows from the buffer. */
- JMETHOD(void, put_pixel_rows, (j_decompress_ptr cinfo,
- djpeg_dest_ptr dinfo,
- JDIMENSION rows_supplied));
- /* Finish up at the end of the image. */
- JMETHOD(void, finish_output, (j_decompress_ptr cinfo,
- djpeg_dest_ptr dinfo));
-
- /* Target file spec; filled in by djpeg.c after object is created. */
- FILE * output_file;
-
- /* Output pixel-row buffer. Created by module init or start_output.
- * Width is cinfo->output_width * cinfo->output_components;
- * height is buffer_height.
- */
- JSAMPARRAY buffer;
- JDIMENSION buffer_height;
-};
-
-
-/*
- * cjpeg/djpeg may need to perform extra passes to convert to or from
- * the source/destination file format. The JPEG library does not know
- * about these passes, but we'd like them to be counted by the progress
- * monitor. We use an expanded progress monitor object to hold the
- * additional pass count.
- */
-
-struct cdjpeg_progress_mgr {
- struct jpeg_progress_mgr pub; /* fields known to JPEG library */
- int completed_extra_passes; /* extra passes completed */
- int total_extra_passes; /* total extra */
- /* last printed percentage stored here to avoid multiple printouts */
- int percent_done;
-};
-
-typedef struct cdjpeg_progress_mgr * cd_progress_ptr;
-
-
-/* Short forms of external names for systems with brain-damaged linkers. */
-
-#ifdef NEED_SHORT_EXTERNAL_NAMES
-#define jinit_read_bmp jIRdBMP
-#define jinit_write_bmp jIWrBMP
-#define jinit_read_gif jIRdGIF
-#define jinit_write_gif jIWrGIF
-#define jinit_read_ppm jIRdPPM
-#define jinit_write_ppm jIWrPPM
-#define jinit_read_rle jIRdRLE
-#define jinit_write_rle jIWrRLE
-#define jinit_read_targa jIRdTarga
-#define jinit_write_targa jIWrTarga
-#define read_quant_tables RdQTables
-#define read_scan_script RdScnScript
-#define set_quant_slots SetQSlots
-#define set_sample_factors SetSFacts
-#define read_color_map RdCMap
-#define enable_signal_catcher EnSigCatcher
-#define start_progress_monitor StProgMon
-#define end_progress_monitor EnProgMon
-#define read_stdin RdStdin
-#define write_stdout WrStdout
-#endif /* NEED_SHORT_EXTERNAL_NAMES */
-
-/* Module selection routines for I/O modules. */
-
-EXTERN(cjpeg_source_ptr) jinit_read_bmp JPP((j_compress_ptr cinfo));
-EXTERN(djpeg_dest_ptr) jinit_write_bmp JPP((j_decompress_ptr cinfo,
- boolean is_os2));
-EXTERN(cjpeg_source_ptr) jinit_read_gif JPP((j_compress_ptr cinfo));
-EXTERN(djpeg_dest_ptr) jinit_write_gif JPP((j_decompress_ptr cinfo));
-EXTERN(cjpeg_source_ptr) jinit_read_ppm JPP((j_compress_ptr cinfo));
-EXTERN(djpeg_dest_ptr) jinit_write_ppm JPP((j_decompress_ptr cinfo));
-EXTERN(cjpeg_source_ptr) jinit_read_rle JPP((j_compress_ptr cinfo));
-EXTERN(djpeg_dest_ptr) jinit_write_rle JPP((j_decompress_ptr cinfo));
-EXTERN(cjpeg_source_ptr) jinit_read_targa JPP((j_compress_ptr cinfo));
-EXTERN(djpeg_dest_ptr) jinit_write_targa JPP((j_decompress_ptr cinfo));
-
-/* cjpeg support routines (in rdswitch.c) */
-
-EXTERN(boolean) read_quant_tables JPP((j_compress_ptr cinfo, char * filename,
- int scale_factor, boolean force_baseline));
-EXTERN(boolean) read_scan_script JPP((j_compress_ptr cinfo, char * filename));
-EXTERN(boolean) set_quant_slots JPP((j_compress_ptr cinfo, char *arg));
-EXTERN(boolean) set_sample_factors JPP((j_compress_ptr cinfo, char *arg));
-
-/* djpeg support routines (in rdcolmap.c) */
-
-EXTERN(void) read_color_map JPP((j_decompress_ptr cinfo, FILE * infile));
-
-/* common support routines (in cdjpeg.c) */
-
-EXTERN(void) enable_signal_catcher JPP((j_common_ptr cinfo));
-EXTERN(void) start_progress_monitor JPP((j_common_ptr cinfo,
- cd_progress_ptr progress));
-EXTERN(void) end_progress_monitor JPP((j_common_ptr cinfo));
-EXTERN(boolean) keymatch JPP((char * arg, const char * keyword, int minchars));
-EXTERN(FILE *) read_stdin JPP((void));
-EXTERN(FILE *) write_stdout JPP((void));
-
-/* miscellaneous useful macros */
-
-#ifdef DONT_USE_B_MODE /* define mode parameters for fopen() */
-#define READ_BINARY "r"
-#define WRITE_BINARY "w"
-#else
-#ifdef VMS /* VMS is very nonstandard */
-#define READ_BINARY "rb", "ctx=stm"
-#define WRITE_BINARY "wb", "ctx=stm"
-#else /* standard ANSI-compliant case */
-#define READ_BINARY "rb"
-#define WRITE_BINARY "wb"
-#endif
-#endif
-
-#ifndef EXIT_FAILURE /* define exit() codes if not provided */
-#define EXIT_FAILURE 1
-#endif
-#ifndef EXIT_SUCCESS
-#ifdef VMS
-#define EXIT_SUCCESS 1 /* VMS is very nonstandard */
-#else
-#define EXIT_SUCCESS 0
-#endif
-#endif
-#ifndef EXIT_WARNING
-#ifdef VMS
-#define EXIT_WARNING 1 /* VMS is very nonstandard */
-#else
-#define EXIT_WARNING 2
-#endif
-#endif
+++ /dev/null
-/*
- * jmemansi.c
- *
- * Copyright (C) 1992-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file provides a simple generic implementation of the system-
- * dependent portion of the JPEG memory manager. This implementation
- * assumes that you have the ANSI-standard library routine tmpfile().
- * Also, the problem of determining the amount of memory available
- * is shoved onto the user.
- */
-
-#define JPEG_INTERNALS
-#include "jinclude.h"
-#include "jpeglib.h"
-#include "jmemsys.h" /* import the system-dependent declarations */
-
-#ifndef HAVE_STDLIB_H /* <stdlib.h> should declare malloc(),free() */
-extern void * malloc JPP((size_t size));
-extern void free JPP((void *ptr));
-#endif
-
-#ifndef SEEK_SET /* pre-ANSI systems may not define this; */
-#define SEEK_SET 0 /* if not, assume 0 is correct */
-#endif
-
-
-/*
- * Memory allocation and freeing are controlled by the regular library
- * routines malloc() and free().
- */
-
-GLOBAL(void *)
-jpeg_get_small (j_common_ptr cinfo, size_t sizeofobject)
-{
- return (void *) malloc(sizeofobject);
-}
-
-GLOBAL(void)
-jpeg_free_small (j_common_ptr cinfo, void * object, size_t sizeofobject)
-{
- free(object);
-}
-
-
-/*
- * "Large" objects are treated the same as "small" ones.
- * NB: although we include FAR keywords in the routine declarations,
- * this file won't actually work in 80x86 small/medium model; at least,
- * you probably won't be able to process useful-size images in only 64KB.
- */
-
-GLOBAL(void FAR *)
-jpeg_get_large (j_common_ptr cinfo, size_t sizeofobject)
-{
- return (void FAR *) malloc(sizeofobject);
-}
-
-GLOBAL(void)
-jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject)
-{
- free(object);
-}
-
-
-/*
- * This routine computes the total memory space available for allocation.
- * It's impossible to do this in a portable way; our current solution is
- * to make the user tell us (with a default value set at compile time).
- * If you can actually get the available space, it's a good idea to subtract
- * a slop factor of 5% or so.
- */
-
-#ifndef DEFAULT_MAX_MEM /* so can override from makefile */
-#define DEFAULT_MAX_MEM 1000000L /* default: one megabyte */
-#endif
-
-GLOBAL(long)
-jpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed,
- long max_bytes_needed, long already_allocated)
-{
- return cinfo->mem->max_memory_to_use - already_allocated;
-}
-
-
-/*
- * Backing store (temporary file) management.
- * Backing store objects are only used when the value returned by
- * jpeg_mem_available is less than the total space needed. You can dispense
- * with these routines if you have plenty of virtual memory; see jmemnobs.c.
- */
-
-
-METHODDEF(void)
-read_backing_store (j_common_ptr cinfo, backing_store_ptr info,
- void FAR * buffer_address,
- long file_offset, long byte_count)
-{
- if (fseek(info->temp_file, file_offset, SEEK_SET))
- ERREXIT(cinfo, JERR_TFILE_SEEK);
- if (JFREAD(info->temp_file, buffer_address, byte_count)
- != (size_t) byte_count)
- ERREXIT(cinfo, JERR_TFILE_READ);
-}
-
-
-METHODDEF(void)
-write_backing_store (j_common_ptr cinfo, backing_store_ptr info,
- void FAR * buffer_address,
- long file_offset, long byte_count)
-{
- if (fseek(info->temp_file, file_offset, SEEK_SET))
- ERREXIT(cinfo, JERR_TFILE_SEEK);
- if (JFWRITE(info->temp_file, buffer_address, byte_count)
- != (size_t) byte_count)
- ERREXIT(cinfo, JERR_TFILE_WRITE);
-}
-
-
-METHODDEF(void)
-close_backing_store (j_common_ptr cinfo, backing_store_ptr info)
-{
- fclose(info->temp_file);
- /* Since this implementation uses tmpfile() to create the file,
- * no explicit file deletion is needed.
- */
-}
-
-
-/*
- * Initial opening of a backing-store object.
- *
- * This version uses tmpfile(), which constructs a suitable file name
- * behind the scenes. We don't have to use info->temp_name[] at all;
- * indeed, we can't even find out the actual name of the temp file.
- */
-
-GLOBAL(void)
-jpeg_open_backing_store (j_common_ptr cinfo, backing_store_ptr info,
- long total_bytes_needed)
-{
- if ((info->temp_file = tmpfile()) == NULL)
- ERREXITS(cinfo, JERR_TFILE_CREATE, "");
- info->read_backing_store = read_backing_store;
- info->write_backing_store = write_backing_store;
- info->close_backing_store = close_backing_store;
-}
-
-
-/*
- * These routines take care of any system-dependent initialization and
- * cleanup required.
- */
-
-GLOBAL(long)
-jpeg_mem_init (j_common_ptr cinfo)
-{
- return DEFAULT_MAX_MEM; /* default for max_memory_to_use */
-}
-
-GLOBAL(void)
-jpeg_mem_term (j_common_ptr cinfo)
-{
- /* no work */
-}
+++ /dev/null
-/*
- * jmemdos.c
- *
- * Copyright (C) 1992-1997, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file provides an MS-DOS-compatible implementation of the system-
- * dependent portion of the JPEG memory manager. Temporary data can be
- * stored in extended or expanded memory as well as in regular DOS files.
- *
- * If you use this file, you must be sure that NEED_FAR_POINTERS is defined
- * if you compile in a small-data memory model; it should NOT be defined if
- * you use a large-data memory model. This file is not recommended if you
- * are using a flat-memory-space 386 environment such as DJGCC or Watcom C.
- * Also, this code will NOT work if struct fields are aligned on greater than
- * 2-byte boundaries.
- *
- * Based on code contributed by Ge' Weijers.
- */
-
-/*
- * If you have both extended and expanded memory, you may want to change the
- * order in which they are tried in jopen_backing_store. On a 286 machine
- * expanded memory is usually faster, since extended memory access involves
- * an expensive protected-mode-and-back switch. On 386 and better, extended
- * memory is usually faster. As distributed, the code tries extended memory
- * first (what? not everyone has a 386? :-).
- *
- * You can disable use of extended/expanded memory entirely by altering these
- * definitions or overriding them from the Makefile (eg, -DEMS_SUPPORTED=0).
- */
-
-#ifndef XMS_SUPPORTED
-#define XMS_SUPPORTED 1
-#endif
-#ifndef EMS_SUPPORTED
-#define EMS_SUPPORTED 1
-#endif
-
-
-#define JPEG_INTERNALS
-#include "jinclude.h"
-#include "jpeglib.h"
-#include "jmemsys.h" /* import the system-dependent declarations */
-
-#ifndef HAVE_STDLIB_H /* <stdlib.h> should declare these */
-extern void * malloc JPP((size_t size));
-extern void free JPP((void *ptr));
-extern char * getenv JPP((const char * name));
-#endif
-
-#ifdef NEED_FAR_POINTERS
-
-#ifdef __TURBOC__
-/* These definitions work for Borland C (Turbo C) */
-#include <alloc.h> /* need farmalloc(), farfree() */
-#define far_malloc(x) farmalloc(x)
-#define far_free(x) farfree(x)
-#else
-/* These definitions work for Microsoft C and compatible compilers */
-#include <malloc.h> /* need _fmalloc(), _ffree() */
-#define far_malloc(x) _fmalloc(x)
-#define far_free(x) _ffree(x)
-#endif
-
-#else /* not NEED_FAR_POINTERS */
-
-#define far_malloc(x) malloc(x)
-#define far_free(x) free(x)
-
-#endif /* NEED_FAR_POINTERS */
-
-#ifdef DONT_USE_B_MODE /* define mode parameters for fopen() */
-#define READ_BINARY "r"
-#else
-#define READ_BINARY "rb"
-#endif
-
-#ifndef USE_MSDOS_MEMMGR /* make sure user got configuration right */
- You forgot to define USE_MSDOS_MEMMGR in jconfig.h. /* deliberate syntax error */
-#endif
-
-#if MAX_ALLOC_CHUNK >= 65535L /* make sure jconfig.h got this right */
- MAX_ALLOC_CHUNK should be less than 64K. /* deliberate syntax error */
-#endif
-
-
-/*
- * Declarations for assembly-language support routines (see jmemdosa.asm).
- *
- * The functions are declared "far" as are all their pointer arguments;
- * this ensures the assembly source code will work regardless of the
- * compiler memory model. We assume "short" is 16 bits, "long" is 32.
- */
-
-typedef void far * XMSDRIVER; /* actually a pointer to code */
-typedef struct { /* registers for calling XMS driver */
- unsigned short ax, dx, bx;
- void far * ds_si;
- } XMScontext;
-typedef struct { /* registers for calling EMS driver */
- unsigned short ax, dx, bx;
- void far * ds_si;
- } EMScontext;
-
-extern short far jdos_open JPP((short far * handle, char far * filename));
-extern short far jdos_close JPP((short handle));
-extern short far jdos_seek JPP((short handle, long offset));
-extern short far jdos_read JPP((short handle, void far * buffer,
- unsigned short count));
-extern short far jdos_write JPP((short handle, void far * buffer,
- unsigned short count));
-extern void far jxms_getdriver JPP((XMSDRIVER far *));
-extern void far jxms_calldriver JPP((XMSDRIVER, XMScontext far *));
-extern short far jems_available JPP((void));
-extern void far jems_calldriver JPP((EMScontext far *));
-
-
-/*
- * Selection of a file name for a temporary file.
- * This is highly system-dependent, and you may want to customize it.
- */
-
-static int next_file_num; /* to distinguish among several temp files */
-
-LOCAL(void)
-select_file_name (char * fname)
-{
- const char * env;
- char * ptr;
- FILE * tfile;
-
- /* Keep generating file names till we find one that's not in use */
- for (;;) {
- /* Get temp directory name from environment TMP or TEMP variable;
- * if none, use "."
- */
- if ((env = (const char *) getenv("TMP")) == NULL)
- if ((env = (const char *) getenv("TEMP")) == NULL)
- env = ".";
- if (*env == '\0') /* null string means "." */
- env = ".";
- ptr = fname; /* copy name to fname */
- while (*env != '\0')
- *ptr++ = *env++;
- if (ptr[-1] != '\\' && ptr[-1] != '/')
- *ptr++ = '\\'; /* append backslash if not in env variable */
- /* Append a suitable file name */
- next_file_num++; /* advance counter */
- sprintf(ptr, "JPG%03d.TMP", next_file_num);
- /* Probe to see if file name is already in use */
- if ((tfile = fopen(fname, READ_BINARY)) == NULL)
- break;
- fclose(tfile); /* oops, it's there; close tfile & try again */
- }
-}
-
-
-/*
- * Near-memory allocation and freeing are controlled by the regular library
- * routines malloc() and free().
- */
-
-GLOBAL(void *)
-jpeg_get_small (j_common_ptr cinfo, size_t sizeofobject)
-{
- return (void *) malloc(sizeofobject);
-}
-
-GLOBAL(void)
-jpeg_free_small (j_common_ptr cinfo, void * object, size_t sizeofobject)
-{
- free(object);
-}
-
-
-/*
- * "Large" objects are allocated in far memory, if possible
- */
-
-GLOBAL(void FAR *)
-jpeg_get_large (j_common_ptr cinfo, size_t sizeofobject)
-{
- return (void FAR *) far_malloc(sizeofobject);
-}
-
-GLOBAL(void)
-jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject)
-{
- far_free(object);
-}
-
-
-/*
- * This routine computes the total memory space available for allocation.
- * It's impossible to do this in a portable way; our current solution is
- * to make the user tell us (with a default value set at compile time).
- * If you can actually get the available space, it's a good idea to subtract
- * a slop factor of 5% or so.
- */
-
-#ifndef DEFAULT_MAX_MEM /* so can override from makefile */
-#define DEFAULT_MAX_MEM 300000L /* for total usage about 450K */
-#endif
-
-GLOBAL(long)
-jpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed,
- long max_bytes_needed, long already_allocated)
-{
- return cinfo->mem->max_memory_to_use - already_allocated;
-}
-
-
-/*
- * Backing store (temporary file) management.
- * Backing store objects are only used when the value returned by
- * jpeg_mem_available is less than the total space needed. You can dispense
- * with these routines if you have plenty of virtual memory; see jmemnobs.c.
- */
-
-/*
- * For MS-DOS we support three types of backing storage:
- * 1. Conventional DOS files. We access these by direct DOS calls rather
- * than via the stdio package. This provides a bit better performance,
- * but the real reason is that the buffers to be read or written are FAR.
- * The stdio library for small-data memory models can't cope with that.
- * 2. Extended memory, accessed per the XMS V2.0 specification.
- * 3. Expanded memory, accessed per the LIM/EMS 4.0 specification.
- * You'll need copies of those specs to make sense of the related code.
- * The specs are available by Internet FTP from the SIMTEL archives
- * (oak.oakland.edu and its various mirror sites). See files
- * pub/msdos/microsoft/xms20.arc and pub/msdos/info/limems41.zip.
- */
-
-
-/*
- * Access methods for a DOS file.
- */
-
-
-METHODDEF(void)
-read_file_store (j_common_ptr cinfo, backing_store_ptr info,
- void FAR * buffer_address,
- long file_offset, long byte_count)
-{
- if (jdos_seek(info->handle.file_handle, file_offset))
- ERREXIT(cinfo, JERR_TFILE_SEEK);
- /* Since MAX_ALLOC_CHUNK is less than 64K, byte_count will be too. */
- if (byte_count > 65535L) /* safety check */
- ERREXIT(cinfo, JERR_BAD_ALLOC_CHUNK);
- if (jdos_read(info->handle.file_handle, buffer_address,
- (unsigned short) byte_count))
- ERREXIT(cinfo, JERR_TFILE_READ);
-}
-
-
-METHODDEF(void)
-write_file_store (j_common_ptr cinfo, backing_store_ptr info,
- void FAR * buffer_address,
- long file_offset, long byte_count)
-{
- if (jdos_seek(info->handle.file_handle, file_offset))
- ERREXIT(cinfo, JERR_TFILE_SEEK);
- /* Since MAX_ALLOC_CHUNK is less than 64K, byte_count will be too. */
- if (byte_count > 65535L) /* safety check */
- ERREXIT(cinfo, JERR_BAD_ALLOC_CHUNK);
- if (jdos_write(info->handle.file_handle, buffer_address,
- (unsigned short) byte_count))
- ERREXIT(cinfo, JERR_TFILE_WRITE);
-}
-
-
-METHODDEF(void)
-close_file_store (j_common_ptr cinfo, backing_store_ptr info)
-{
- jdos_close(info->handle.file_handle); /* close the file */
- remove(info->temp_name); /* delete the file */
-/* If your system doesn't have remove(), try unlink() instead.
- * remove() is the ANSI-standard name for this function, but
- * unlink() was more common in pre-ANSI systems.
- */
- TRACEMSS(cinfo, 1, JTRC_TFILE_CLOSE, info->temp_name);
-}
-
-
-LOCAL(boolean)
-open_file_store (j_common_ptr cinfo, backing_store_ptr info,
- long total_bytes_needed)
-{
- short handle;
-
- select_file_name(info->temp_name);
- if (jdos_open((short far *) & handle, (char far *) info->temp_name)) {
- /* might as well exit since jpeg_open_backing_store will fail anyway */
- ERREXITS(cinfo, JERR_TFILE_CREATE, info->temp_name);
- return FALSE;
- }
- info->handle.file_handle = handle;
- info->read_backing_store = read_file_store;
- info->write_backing_store = write_file_store;
- info->close_backing_store = close_file_store;
- TRACEMSS(cinfo, 1, JTRC_TFILE_OPEN, info->temp_name);
- return TRUE; /* succeeded */
-}
-
-
-/*
- * Access methods for extended memory.
- */
-
-#if XMS_SUPPORTED
-
-static XMSDRIVER xms_driver; /* saved address of XMS driver */
-
-typedef union { /* either long offset or real-mode pointer */
- long offset;
- void far * ptr;
- } XMSPTR;
-
-typedef struct { /* XMS move specification structure */
- long length;
- XMSH src_handle;
- XMSPTR src;
- XMSH dst_handle;
- XMSPTR dst;
- } XMSspec;
-
-#define ODD(X) (((X) & 1L) != 0)
-
-
-METHODDEF(void)
-read_xms_store (j_common_ptr cinfo, backing_store_ptr info,
- void FAR * buffer_address,
- long file_offset, long byte_count)
-{
- XMScontext ctx;
- XMSspec spec;
- char endbuffer[2];
-
- /* The XMS driver can't cope with an odd length, so handle the last byte
- * specially if byte_count is odd. We don't expect this to be common.
- */
-
- spec.length = byte_count & (~ 1L);
- spec.src_handle = info->handle.xms_handle;
- spec.src.offset = file_offset;
- spec.dst_handle = 0;
- spec.dst.ptr = buffer_address;
-
- ctx.ds_si = (void far *) & spec;
- ctx.ax = 0x0b00; /* EMB move */
- jxms_calldriver(xms_driver, (XMScontext far *) & ctx);
- if (ctx.ax != 1)
- ERREXIT(cinfo, JERR_XMS_READ);
-
- if (ODD(byte_count)) {
- read_xms_store(cinfo, info, (void FAR *) endbuffer,
- file_offset + byte_count - 1L, 2L);
- ((char FAR *) buffer_address)[byte_count - 1L] = endbuffer[0];
- }
-}
-
-
-METHODDEF(void)
-write_xms_store (j_common_ptr cinfo, backing_store_ptr info,
- void FAR * buffer_address,
- long file_offset, long byte_count)
-{
- XMScontext ctx;
- XMSspec spec;
- char endbuffer[2];
-
- /* The XMS driver can't cope with an odd length, so handle the last byte
- * specially if byte_count is odd. We don't expect this to be common.
- */
-
- spec.length = byte_count & (~ 1L);
- spec.src_handle = 0;
- spec.src.ptr = buffer_address;
- spec.dst_handle = info->handle.xms_handle;
- spec.dst.offset = file_offset;
-
- ctx.ds_si = (void far *) & spec;
- ctx.ax = 0x0b00; /* EMB move */
- jxms_calldriver(xms_driver, (XMScontext far *) & ctx);
- if (ctx.ax != 1)
- ERREXIT(cinfo, JERR_XMS_WRITE);
-
- if (ODD(byte_count)) {
- read_xms_store(cinfo, info, (void FAR *) endbuffer,
- file_offset + byte_count - 1L, 2L);
- endbuffer[0] = ((char FAR *) buffer_address)[byte_count - 1L];
- write_xms_store(cinfo, info, (void FAR *) endbuffer,
- file_offset + byte_count - 1L, 2L);
- }
-}
-
-
-METHODDEF(void)
-close_xms_store (j_common_ptr cinfo, backing_store_ptr info)
-{
- XMScontext ctx;
-
- ctx.dx = info->handle.xms_handle;
- ctx.ax = 0x0a00;
- jxms_calldriver(xms_driver, (XMScontext far *) & ctx);
- TRACEMS1(cinfo, 1, JTRC_XMS_CLOSE, info->handle.xms_handle);
- /* we ignore any error return from the driver */
-}
-
-
-LOCAL(boolean)
-open_xms_store (j_common_ptr cinfo, backing_store_ptr info,
- long total_bytes_needed)
-{
- XMScontext ctx;
-
- /* Get address of XMS driver */
- jxms_getdriver((XMSDRIVER far *) & xms_driver);
- if (xms_driver == NULL)
- return FALSE; /* no driver to be had */
-
- /* Get version number, must be >= 2.00 */
- ctx.ax = 0x0000;
- jxms_calldriver(xms_driver, (XMScontext far *) & ctx);
- if (ctx.ax < (unsigned short) 0x0200)
- return FALSE;
-
- /* Try to get space (expressed in kilobytes) */
- ctx.dx = (unsigned short) ((total_bytes_needed + 1023L) >> 10);
- ctx.ax = 0x0900;
- jxms_calldriver(xms_driver, (XMScontext far *) & ctx);
- if (ctx.ax != 1)
- return FALSE;
-
- /* Succeeded, save the handle and away we go */
- info->handle.xms_handle = ctx.dx;
- info->read_backing_store = read_xms_store;
- info->write_backing_store = write_xms_store;
- info->close_backing_store = close_xms_store;
- TRACEMS1(cinfo, 1, JTRC_XMS_OPEN, ctx.dx);
- return TRUE; /* succeeded */
-}
-
-#endif /* XMS_SUPPORTED */
-
-
-/*
- * Access methods for expanded memory.
- */
-
-#if EMS_SUPPORTED
-
-/* The EMS move specification structure requires word and long fields aligned
- * at odd byte boundaries. Some compilers will align struct fields at even
- * byte boundaries. While it's usually possible to force byte alignment,
- * that causes an overall performance penalty and may pose problems in merging
- * JPEG into a larger application. Instead we accept some rather dirty code
- * here. Note this code would fail if the hardware did not allow odd-byte
- * word & long accesses, but all 80x86 CPUs do.
- */
-
-typedef void far * EMSPTR;
-
-typedef union { /* EMS move specification structure */
- long length; /* It's easy to access first 4 bytes */
- char bytes[18]; /* Misaligned fields in here! */
- } EMSspec;
-
-/* Macros for accessing misaligned fields */
-#define FIELD_AT(spec,offset,type) (*((type *) &(spec.bytes[offset])))
-#define SRC_TYPE(spec) FIELD_AT(spec,4,char)
-#define SRC_HANDLE(spec) FIELD_AT(spec,5,EMSH)
-#define SRC_OFFSET(spec) FIELD_AT(spec,7,unsigned short)
-#define SRC_PAGE(spec) FIELD_AT(spec,9,unsigned short)
-#define SRC_PTR(spec) FIELD_AT(spec,7,EMSPTR)
-#define DST_TYPE(spec) FIELD_AT(spec,11,char)
-#define DST_HANDLE(spec) FIELD_AT(spec,12,EMSH)
-#define DST_OFFSET(spec) FIELD_AT(spec,14,unsigned short)
-#define DST_PAGE(spec) FIELD_AT(spec,16,unsigned short)
-#define DST_PTR(spec) FIELD_AT(spec,14,EMSPTR)
-
-#define EMSPAGESIZE 16384L /* gospel, see the EMS specs */
-
-#define HIBYTE(W) (((W) >> 8) & 0xFF)
-#define LOBYTE(W) ((W) & 0xFF)
-
-
-METHODDEF(void)
-read_ems_store (j_common_ptr cinfo, backing_store_ptr info,
- void FAR * buffer_address,
- long file_offset, long byte_count)
-{
- EMScontext ctx;
- EMSspec spec;
-
- spec.length = byte_count;
- SRC_TYPE(spec) = 1;
- SRC_HANDLE(spec) = info->handle.ems_handle;
- SRC_PAGE(spec) = (unsigned short) (file_offset / EMSPAGESIZE);
- SRC_OFFSET(spec) = (unsigned short) (file_offset % EMSPAGESIZE);
- DST_TYPE(spec) = 0;
- DST_HANDLE(spec) = 0;
- DST_PTR(spec) = buffer_address;
-
- ctx.ds_si = (void far *) & spec;
- ctx.ax = 0x5700; /* move memory region */
- jems_calldriver((EMScontext far *) & ctx);
- if (HIBYTE(ctx.ax) != 0)
- ERREXIT(cinfo, JERR_EMS_READ);
-}
-
-
-METHODDEF(void)
-write_ems_store (j_common_ptr cinfo, backing_store_ptr info,
- void FAR * buffer_address,
- long file_offset, long byte_count)
-{
- EMScontext ctx;
- EMSspec spec;
-
- spec.length = byte_count;
- SRC_TYPE(spec) = 0;
- SRC_HANDLE(spec) = 0;
- SRC_PTR(spec) = buffer_address;
- DST_TYPE(spec) = 1;
- DST_HANDLE(spec) = info->handle.ems_handle;
- DST_PAGE(spec) = (unsigned short) (file_offset / EMSPAGESIZE);
- DST_OFFSET(spec) = (unsigned short) (file_offset % EMSPAGESIZE);
-
- ctx.ds_si = (void far *) & spec;
- ctx.ax = 0x5700; /* move memory region */
- jems_calldriver((EMScontext far *) & ctx);
- if (HIBYTE(ctx.ax) != 0)
- ERREXIT(cinfo, JERR_EMS_WRITE);
-}
-
-
-METHODDEF(void)
-close_ems_store (j_common_ptr cinfo, backing_store_ptr info)
-{
- EMScontext ctx;
-
- ctx.ax = 0x4500;
- ctx.dx = info->handle.ems_handle;
- jems_calldriver((EMScontext far *) & ctx);
- TRACEMS1(cinfo, 1, JTRC_EMS_CLOSE, info->handle.ems_handle);
- /* we ignore any error return from the driver */
-}
-
-
-LOCAL(boolean)
-open_ems_store (j_common_ptr cinfo, backing_store_ptr info,
- long total_bytes_needed)
-{
- EMScontext ctx;
-
- /* Is EMS driver there? */
- if (! jems_available())
- return FALSE;
-
- /* Get status, make sure EMS is OK */
- ctx.ax = 0x4000;
- jems_calldriver((EMScontext far *) & ctx);
- if (HIBYTE(ctx.ax) != 0)
- return FALSE;
-
- /* Get version, must be >= 4.0 */
- ctx.ax = 0x4600;
- jems_calldriver((EMScontext far *) & ctx);
- if (HIBYTE(ctx.ax) != 0 || LOBYTE(ctx.ax) < 0x40)
- return FALSE;
-
- /* Try to allocate requested space */
- ctx.ax = 0x4300;
- ctx.bx = (unsigned short) ((total_bytes_needed + EMSPAGESIZE-1L) / EMSPAGESIZE);
- jems_calldriver((EMScontext far *) & ctx);
- if (HIBYTE(ctx.ax) != 0)
- return FALSE;
-
- /* Succeeded, save the handle and away we go */
- info->handle.ems_handle = ctx.dx;
- info->read_backing_store = read_ems_store;
- info->write_backing_store = write_ems_store;
- info->close_backing_store = close_ems_store;
- TRACEMS1(cinfo, 1, JTRC_EMS_OPEN, ctx.dx);
- return TRUE; /* succeeded */
-}
-
-#endif /* EMS_SUPPORTED */
-
-
-/*
- * Initial opening of a backing-store object.
- */
-
-GLOBAL(void)
-jpeg_open_backing_store (j_common_ptr cinfo, backing_store_ptr info,
- long total_bytes_needed)
-{
- /* Try extended memory, then expanded memory, then regular file. */
-#if XMS_SUPPORTED
- if (open_xms_store(cinfo, info, total_bytes_needed))
- return;
-#endif
-#if EMS_SUPPORTED
- if (open_ems_store(cinfo, info, total_bytes_needed))
- return;
-#endif
- if (open_file_store(cinfo, info, total_bytes_needed))
- return;
- ERREXITS(cinfo, JERR_TFILE_CREATE, "");
-}
-
-
-/*
- * These routines take care of any system-dependent initialization and
- * cleanup required.
- */
-
-GLOBAL(long)
-jpeg_mem_init (j_common_ptr cinfo)
-{
- next_file_num = 0; /* initialize temp file name generator */
- return DEFAULT_MAX_MEM; /* default for max_memory_to_use */
-}
-
-GLOBAL(void)
-jpeg_mem_term (j_common_ptr cinfo)
-{
- /* Microsoft C, at least in v6.00A, will not successfully reclaim freed
- * blocks of size > 32Kbytes unless we give it a kick in the rear, like so:
- */
-#ifdef NEED_FHEAPMIN
- _fheapmin();
-#endif
-}
+++ /dev/null
-/*
- * jmemmac.c
- *
- * Copyright (C) 1992-1997, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * jmemmac.c provides an Apple Macintosh implementation of the system-
- * dependent portion of the JPEG memory manager.
- *
- * If you use jmemmac.c, then you must define USE_MAC_MEMMGR in the
- * JPEG_INTERNALS part of jconfig.h.
- *
- * jmemmac.c uses the Macintosh toolbox routines NewPtr and DisposePtr
- * instead of malloc and free. It accurately determines the amount of
- * memory available by using CompactMem. Notice that if left to its
- * own devices, this code can chew up all available space in the
- * application's zone, with the exception of the rather small "slop"
- * factor computed in jpeg_mem_available(). The application can ensure
- * that more space is left over by reducing max_memory_to_use.
- *
- * Large images are swapped to disk using temporary files and System 7.0+'s
- * temporary folder functionality.
- *
- * Note that jmemmac.c depends on two features of MacOS that were first
- * introduced in System 7: FindFolder and the FSSpec-based calls.
- * If your application uses jmemmac.c and is run under System 6 or earlier,
- * and the jpeg library decides it needs a temporary file, it will abort,
- * printing error messages about requiring System 7. (If no temporary files
- * are created, it will run fine.)
- *
- * If you want to use jmemmac.c in an application that might be used with
- * System 6 or earlier, then you should remove dependencies on FindFolder
- * and the FSSpec calls. You will need to replace FindFolder with some
- * other mechanism for finding a place to put temporary files, and you
- * should replace the FSSpec calls with their HFS equivalents:
- *
- * FSpDelete -> HDelete
- * FSpGetFInfo -> HGetFInfo
- * FSpCreate -> HCreate
- * FSpOpenDF -> HOpen *** Note: not HOpenDF ***
- * FSMakeFSSpec -> (fill in spec by hand.)
- *
- * (Use HOpen instead of HOpenDF. HOpen is just a glue-interface to PBHOpen,
- * which is on all HFS macs. HOpenDF is a System 7 addition which avoids the
- * ages-old problem of names starting with a period.)
- *
- * Contributed by Sam Bushell (jsam@iagu.on.net) and
- * Dan Gildor (gyld@in-touch.com).
- */
-
-#define JPEG_INTERNALS
-#include "jinclude.h"
-#include "jpeglib.h"
-#include "jmemsys.h" /* import the system-dependent declarations */
-
-#ifndef USE_MAC_MEMMGR /* make sure user got configuration right */
- You forgot to define USE_MAC_MEMMGR in jconfig.h. /* deliberate syntax error */
-#endif
-
-#include <Memory.h> /* we use the MacOS memory manager */
-#include <Files.h> /* we use the MacOS File stuff */
-#include <Folders.h> /* we use the MacOS HFS stuff */
-#include <Script.h> /* for smSystemScript */
-#include <Gestalt.h> /* we use Gestalt to test for specific functionality */
-
-#ifndef TEMP_FILE_NAME /* can override from jconfig.h or Makefile */
-#define TEMP_FILE_NAME "JPG%03d.TMP"
-#endif
-
-static int next_file_num; /* to distinguish among several temp files */
-
-
-/*
- * Memory allocation and freeing are controlled by the MacOS library
- * routines NewPtr() and DisposePtr(), which allocate fixed-address
- * storage. Unfortunately, the IJG library isn't smart enough to cope
- * with relocatable storage.
- */
-
-GLOBAL(void *)
-jpeg_get_small (j_common_ptr cinfo, size_t sizeofobject)
-{
- return (void *) NewPtr(sizeofobject);
-}
-
-GLOBAL(void)
-jpeg_free_small (j_common_ptr cinfo, void * object, size_t sizeofobject)
-{
- DisposePtr((Ptr) object);
-}
-
-
-/*
- * "Large" objects are treated the same as "small" ones.
- * NB: we include FAR keywords in the routine declarations simply for
- * consistency with the rest of the IJG code; FAR should expand to empty
- * on rational architectures like the Mac.
- */
-
-GLOBAL(void FAR *)
-jpeg_get_large (j_common_ptr cinfo, size_t sizeofobject)
-{
- return (void FAR *) NewPtr(sizeofobject);
-}
-
-GLOBAL(void)
-jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject)
-{
- DisposePtr((Ptr) object);
-}
-
-
-/*
- * This routine computes the total memory space available for allocation.
- */
-
-GLOBAL(long)
-jpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed,
- long max_bytes_needed, long already_allocated)
-{
- long limit = cinfo->mem->max_memory_to_use - already_allocated;
- long slop, mem;
-
- /* Don't ask for more than what application has told us we may use */
- if (max_bytes_needed > limit && limit > 0)
- max_bytes_needed = limit;
- /* Find whether there's a big enough free block in the heap.
- * CompactMem tries to create a contiguous block of the requested size,
- * and then returns the size of the largest free block (which could be
- * much more or much less than we asked for).
- * We add some slop to ensure we don't use up all available memory.
- */
- slop = max_bytes_needed / 16 + 32768L;
- mem = CompactMem(max_bytes_needed + slop) - slop;
- if (mem < 0)
- mem = 0; /* sigh, couldn't even get the slop */
- /* Don't take more than the application says we can have */
- if (mem > limit && limit > 0)
- mem = limit;
- return mem;
-}
-
-
-/*
- * Backing store (temporary file) management.
- * Backing store objects are only used when the value returned by
- * jpeg_mem_available is less than the total space needed. You can dispense
- * with these routines if you have plenty of virtual memory; see jmemnobs.c.
- */
-
-
-METHODDEF(void)
-read_backing_store (j_common_ptr cinfo, backing_store_ptr info,
- void FAR * buffer_address,
- long file_offset, long byte_count)
-{
- long bytes = byte_count;
- long retVal;
-
- if ( SetFPos ( info->temp_file, fsFromStart, file_offset ) != noErr )
- ERREXIT(cinfo, JERR_TFILE_SEEK);
-
- retVal = FSRead ( info->temp_file, &bytes,
- (unsigned char *) buffer_address );
- if ( retVal != noErr || bytes != byte_count )
- ERREXIT(cinfo, JERR_TFILE_READ);
-}
-
-
-METHODDEF(void)
-write_backing_store (j_common_ptr cinfo, backing_store_ptr info,
- void FAR * buffer_address,
- long file_offset, long byte_count)
-{
- long bytes = byte_count;
- long retVal;
-
- if ( SetFPos ( info->temp_file, fsFromStart, file_offset ) != noErr )
- ERREXIT(cinfo, JERR_TFILE_SEEK);
-
- retVal = FSWrite ( info->temp_file, &bytes,
- (unsigned char *) buffer_address );
- if ( retVal != noErr || bytes != byte_count )
- ERREXIT(cinfo, JERR_TFILE_WRITE);
-}
-
-
-METHODDEF(void)
-close_backing_store (j_common_ptr cinfo, backing_store_ptr info)
-{
- FSClose ( info->temp_file );
- FSpDelete ( &(info->tempSpec) );
-}
-
-
-/*
- * Initial opening of a backing-store object.
- *
- * This version uses FindFolder to find the Temporary Items folder,
- * and puts the temporary file in there.
- */
-
-GLOBAL(void)
-jpeg_open_backing_store (j_common_ptr cinfo, backing_store_ptr info,
- long total_bytes_needed)
-{
- short tmpRef, vRefNum;
- long dirID;
- FInfo finderInfo;
- FSSpec theSpec;
- Str255 fName;
- OSErr osErr;
- long gestaltResponse = 0;
-
- /* Check that FSSpec calls are available. */
- osErr = Gestalt( gestaltFSAttr, &gestaltResponse );
- if ( ( osErr != noErr )
- || !( gestaltResponse & (1<<gestaltHasFSSpecCalls) ) )
- ERREXITS(cinfo, JERR_TFILE_CREATE, "- System 7.0 or later required");
- /* TO DO: add a proper error message to jerror.h. */
-
- /* Check that FindFolder is available. */
- osErr = Gestalt( gestaltFindFolderAttr, &gestaltResponse );
- if ( ( osErr != noErr )
- || !( gestaltResponse & (1<<gestaltFindFolderPresent) ) )
- ERREXITS(cinfo, JERR_TFILE_CREATE, "- System 7.0 or later required.");
- /* TO DO: add a proper error message to jerror.h. */
-
- osErr = FindFolder ( kOnSystemDisk, kTemporaryFolderType, kCreateFolder,
- &vRefNum, &dirID );
- if ( osErr != noErr )
- ERREXITS(cinfo, JERR_TFILE_CREATE, "- temporary items folder unavailable");
- /* TO DO: Try putting the temp files somewhere else. */
-
- /* Keep generating file names till we find one that's not in use */
- for (;;) {
- next_file_num++; /* advance counter */
-
- sprintf(info->temp_name, TEMP_FILE_NAME, next_file_num);
- strcpy ( (Ptr)fName+1, info->temp_name );
- *fName = strlen (info->temp_name);
- osErr = FSMakeFSSpec ( vRefNum, dirID, fName, &theSpec );
-
- if ( (osErr = FSpGetFInfo ( &theSpec, &finderInfo ) ) != noErr )
- break;
- }
-
- osErr = FSpCreate ( &theSpec, '????', '????', smSystemScript );
- if ( osErr != noErr )
- ERREXITS(cinfo, JERR_TFILE_CREATE, info->temp_name);
-
- osErr = FSpOpenDF ( &theSpec, fsRdWrPerm, &(info->temp_file) );
- if ( osErr != noErr )
- ERREXITS(cinfo, JERR_TFILE_CREATE, info->temp_name);
-
- info->tempSpec = theSpec;
-
- info->read_backing_store = read_backing_store;
- info->write_backing_store = write_backing_store;
- info->close_backing_store = close_backing_store;
- TRACEMSS(cinfo, 1, JTRC_TFILE_OPEN, info->temp_name);
-}
-
-
-/*
- * These routines take care of any system-dependent initialization and
- * cleanup required.
- */
-
-GLOBAL(long)
-jpeg_mem_init (j_common_ptr cinfo)
-{
- next_file_num = 0;
-
- /* max_memory_to_use will be initialized to FreeMem()'s result;
- * the calling application might later reduce it, for example
- * to leave room to invoke multiple JPEG objects.
- * Note that FreeMem returns the total number of free bytes;
- * it may not be possible to allocate a single block of this size.
- */
- return FreeMem();
-}
-
-GLOBAL(void)
-jpeg_mem_term (j_common_ptr cinfo)
-{
- /* no work */
-}
+++ /dev/null
-/*
- * jmemname.c
- *
- * Copyright (C) 1992-1997, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file provides a generic implementation of the system-dependent
- * portion of the JPEG memory manager. This implementation assumes that
- * you must explicitly construct a name for each temp file.
- * Also, the problem of determining the amount of memory available
- * is shoved onto the user.
- */
-
-#define JPEG_INTERNALS
-#include "jinclude.h"
-#include "jpeglib.h"
-#include "jmemsys.h" /* import the system-dependent declarations */
-
-#ifndef HAVE_STDLIB_H /* <stdlib.h> should declare malloc(),free() */
-extern void * malloc JPP((size_t size));
-extern void free JPP((void *ptr));
-#endif
-
-#ifndef SEEK_SET /* pre-ANSI systems may not define this; */
-#define SEEK_SET 0 /* if not, assume 0 is correct */
-#endif
-
-#ifdef DONT_USE_B_MODE /* define mode parameters for fopen() */
-#define READ_BINARY "r"
-#define RW_BINARY "w+"
-#else
-#ifdef VMS /* VMS is very nonstandard */
-#define READ_BINARY "rb", "ctx=stm"
-#define RW_BINARY "w+b", "ctx=stm"
-#else /* standard ANSI-compliant case */
-#define READ_BINARY "rb"
-#define RW_BINARY "w+b"
-#endif
-#endif
-
-
-/*
- * Selection of a file name for a temporary file.
- * This is system-dependent!
- *
- * The code as given is suitable for most Unix systems, and it is easily
- * modified for most non-Unix systems. Some notes:
- * 1. The temp file is created in the directory named by TEMP_DIRECTORY.
- * The default value is /usr/tmp, which is the conventional place for
- * creating large temp files on Unix. On other systems you'll probably
- * want to change the file location. You can do this by editing the
- * #define, or (preferred) by defining TEMP_DIRECTORY in jconfig.h.
- *
- * 2. If you need to change the file name as well as its location,
- * you can override the TEMP_FILE_NAME macro. (Note that this is
- * actually a printf format string; it must contain %s and %d.)
- * Few people should need to do this.
- *
- * 3. mktemp() is used to ensure that multiple processes running
- * simultaneously won't select the same file names. If your system
- * doesn't have mktemp(), define NO_MKTEMP to do it the hard way.
- * (If you don't have <errno.h>, also define NO_ERRNO_H.)
- *
- * 4. You probably want to define NEED_SIGNAL_CATCHER so that cjpeg.c/djpeg.c
- * will cause the temp files to be removed if you stop the program early.
- */
-
-#ifndef TEMP_DIRECTORY /* can override from jconfig.h or Makefile */
-#define TEMP_DIRECTORY "/usr/tmp/" /* recommended setting for Unix */
-#endif
-
-static int next_file_num; /* to distinguish among several temp files */
-
-#ifdef NO_MKTEMP
-
-#ifndef TEMP_FILE_NAME /* can override from jconfig.h or Makefile */
-#define TEMP_FILE_NAME "%sJPG%03d.TMP"
-#endif
-
-#ifndef NO_ERRNO_H
-#include <errno.h> /* to define ENOENT */
-#endif
-
-/* ANSI C specifies that errno is a macro, but on older systems it's more
- * likely to be a plain int variable. And not all versions of errno.h
- * bother to declare it, so we have to in order to be most portable. Thus:
- */
-#ifndef errno
-extern int errno;
-#endif
-
-
-LOCAL(void)
-select_file_name (char * fname)
-{
- FILE * tfile;
-
- /* Keep generating file names till we find one that's not in use */
- for (;;) {
- next_file_num++; /* advance counter */
- sprintf(fname, TEMP_FILE_NAME, TEMP_DIRECTORY, next_file_num);
- if ((tfile = fopen(fname, READ_BINARY)) == NULL) {
- /* fopen could have failed for a reason other than the file not
- * being there; for example, file there but unreadable.
- * If <errno.h> isn't available, then we cannot test the cause.
- */
-#ifdef ENOENT
- if (errno != ENOENT)
- continue;
-#endif
- break;
- }
- fclose(tfile); /* oops, it's there; close tfile & try again */
- }
-}
-
-#else /* ! NO_MKTEMP */
-
-/* Note that mktemp() requires the initial filename to end in six X's */
-#ifndef TEMP_FILE_NAME /* can override from jconfig.h or Makefile */
-#define TEMP_FILE_NAME "%sJPG%dXXXXXX"
-#endif
-
-LOCAL(void)
-select_file_name (char * fname)
-{
- next_file_num++; /* advance counter */
- sprintf(fname, TEMP_FILE_NAME, TEMP_DIRECTORY, next_file_num);
- mktemp(fname); /* make sure file name is unique */
- /* mktemp replaces the trailing XXXXXX with a unique string of characters */
-}
-
-#endif /* NO_MKTEMP */
-
-
-/*
- * Memory allocation and freeing are controlled by the regular library
- * routines malloc() and free().
- */
-
-GLOBAL(void *)
-jpeg_get_small (j_common_ptr cinfo, size_t sizeofobject)
-{
- return (void *) malloc(sizeofobject);
-}
-
-GLOBAL(void)
-jpeg_free_small (j_common_ptr cinfo, void * object, size_t sizeofobject)
-{
- free(object);
-}
-
-
-/*
- * "Large" objects are treated the same as "small" ones.
- * NB: although we include FAR keywords in the routine declarations,
- * this file won't actually work in 80x86 small/medium model; at least,
- * you probably won't be able to process useful-size images in only 64KB.
- */
-
-GLOBAL(void FAR *)
-jpeg_get_large (j_common_ptr cinfo, size_t sizeofobject)
-{
- return (void FAR *) malloc(sizeofobject);
-}
-
-GLOBAL(void)
-jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject)
-{
- free(object);
-}
-
-
-/*
- * This routine computes the total memory space available for allocation.
- * It's impossible to do this in a portable way; our current solution is
- * to make the user tell us (with a default value set at compile time).
- * If you can actually get the available space, it's a good idea to subtract
- * a slop factor of 5% or so.
- */
-
-#ifndef DEFAULT_MAX_MEM /* so can override from makefile */
-#define DEFAULT_MAX_MEM 1000000L /* default: one megabyte */
-#endif
-
-GLOBAL(long)
-jpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed,
- long max_bytes_needed, long already_allocated)
-{
- return cinfo->mem->max_memory_to_use - already_allocated;
-}
-
-
-/*
- * Backing store (temporary file) management.
- * Backing store objects are only used when the value returned by
- * jpeg_mem_available is less than the total space needed. You can dispense
- * with these routines if you have plenty of virtual memory; see jmemnobs.c.
- */
-
-
-METHODDEF(void)
-read_backing_store (j_common_ptr cinfo, backing_store_ptr info,
- void FAR * buffer_address,
- long file_offset, long byte_count)
-{
- if (fseek(info->temp_file, file_offset, SEEK_SET))
- ERREXIT(cinfo, JERR_TFILE_SEEK);
- if (JFREAD(info->temp_file, buffer_address, byte_count)
- != (size_t) byte_count)
- ERREXIT(cinfo, JERR_TFILE_READ);
-}
-
-
-METHODDEF(void)
-write_backing_store (j_common_ptr cinfo, backing_store_ptr info,
- void FAR * buffer_address,
- long file_offset, long byte_count)
-{
- if (fseek(info->temp_file, file_offset, SEEK_SET))
- ERREXIT(cinfo, JERR_TFILE_SEEK);
- if (JFWRITE(info->temp_file, buffer_address, byte_count)
- != (size_t) byte_count)
- ERREXIT(cinfo, JERR_TFILE_WRITE);
-}
-
-
-METHODDEF(void)
-close_backing_store (j_common_ptr cinfo, backing_store_ptr info)
-{
- fclose(info->temp_file); /* close the file */
- unlink(info->temp_name); /* delete the file */
-/* If your system doesn't have unlink(), use remove() instead.
- * remove() is the ANSI-standard name for this function, but if
- * your system was ANSI you'd be using jmemansi.c, right?
- */
- TRACEMSS(cinfo, 1, JTRC_TFILE_CLOSE, info->temp_name);
-}
-
-
-/*
- * Initial opening of a backing-store object.
- */
-
-GLOBAL(void)
-jpeg_open_backing_store (j_common_ptr cinfo, backing_store_ptr info,
- long total_bytes_needed)
-{
- select_file_name(info->temp_name);
- if ((info->temp_file = fopen(info->temp_name, RW_BINARY)) == NULL)
- ERREXITS(cinfo, JERR_TFILE_CREATE, info->temp_name);
- info->read_backing_store = read_backing_store;
- info->write_backing_store = write_backing_store;
- info->close_backing_store = close_backing_store;
- TRACEMSS(cinfo, 1, JTRC_TFILE_OPEN, info->temp_name);
-}
-
-
-/*
- * These routines take care of any system-dependent initialization and
- * cleanup required.
- */
-
-GLOBAL(long)
-jpeg_mem_init (j_common_ptr cinfo)
-{
- next_file_num = 0; /* initialize temp file name generator */
- return DEFAULT_MAX_MEM; /* default for max_memory_to_use */
-}
-
-GLOBAL(void)
-jpeg_mem_term (j_common_ptr cinfo)
-{
- /* no work */
-}
+++ /dev/null
-/*
- * rdbmp.c
- *
- * Copyright (C) 1994-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains routines to read input images in Microsoft "BMP"
- * format (MS Windows 3.x, OS/2 1.x, and OS/2 2.x flavors).
- * Currently, only 8-bit and 24-bit images are supported, not 1-bit or
- * 4-bit (feeding such low-depth images into JPEG would be silly anyway).
- * Also, we don't support RLE-compressed files.
- *
- * These routines may need modification for non-Unix environments or
- * specialized applications. As they stand, they assume input from
- * an ordinary stdio stream. They further assume that reading begins
- * at the start of the file; start_input may need work if the
- * user interface has already read some data (e.g., to determine that
- * the file is indeed BMP format).
- *
- * This code contributed by James Arthur Boucher.
- */
-
-#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
-
-#ifdef BMP_SUPPORTED
-
-
-/* Macros to deal with unsigned chars as efficiently as compiler allows */
-
-#ifdef HAVE_UNSIGNED_CHAR
-typedef unsigned char U_CHAR;
-#define UCH(x) ((int) (x))
-#else /* !HAVE_UNSIGNED_CHAR */
-#ifdef CHAR_IS_UNSIGNED
-typedef char U_CHAR;
-#define UCH(x) ((int) (x))
-#else
-typedef char U_CHAR;
-#define UCH(x) ((int) (x) & 0xFF)
-#endif
-#endif /* HAVE_UNSIGNED_CHAR */
-
-
-#define ReadOK(file,buffer,len) (JFREAD(file,buffer,len) == ((size_t) (len)))
-
-
-/* Private version of data source object */
-
-typedef struct _bmp_source_struct * bmp_source_ptr;
-
-typedef struct _bmp_source_struct {
- struct cjpeg_source_struct pub; /* public fields */
-
- j_compress_ptr cinfo; /* back link saves passing separate parm */
-
- JSAMPARRAY colormap; /* BMP colormap (converted to my format) */
-
- jvirt_sarray_ptr whole_image; /* Needed to reverse row order */
- JDIMENSION source_row; /* Current source row number */
- JDIMENSION row_width; /* Physical width of scanlines in file */
-
- int bits_per_pixel; /* remembers 8- or 24-bit format */
-} bmp_source_struct;
-
-
-LOCAL(int)
-read_byte (bmp_source_ptr sinfo)
-/* Read next byte from BMP file */
-{
- register FILE *infile = sinfo->pub.input_file;
- register int c;
-
- if ((c = getc(infile)) == EOF)
- ERREXIT(sinfo->cinfo, JERR_INPUT_EOF);
- return c;
-}
-
-
-LOCAL(void)
-read_colormap (bmp_source_ptr sinfo, int cmaplen, int mapentrysize)
-/* Read the colormap from a BMP file */
-{
- int i;
-
- switch (mapentrysize) {
- case 3:
- /* BGR format (occurs in OS/2 files) */
- for (i = 0; i < cmaplen; i++) {
- sinfo->colormap[2][i] = (JSAMPLE) read_byte(sinfo);
- sinfo->colormap[1][i] = (JSAMPLE) read_byte(sinfo);
- sinfo->colormap[0][i] = (JSAMPLE) read_byte(sinfo);
- }
- break;
- case 4:
- /* BGR0 format (occurs in MS Windows files) */
- for (i = 0; i < cmaplen; i++) {
- sinfo->colormap[2][i] = (JSAMPLE) read_byte(sinfo);
- sinfo->colormap[1][i] = (JSAMPLE) read_byte(sinfo);
- sinfo->colormap[0][i] = (JSAMPLE) read_byte(sinfo);
- (void) read_byte(sinfo);
- }
- break;
- default:
- ERREXIT(sinfo->cinfo, JERR_BMP_BADCMAP);
- break;
- }
-}
-
-
-/*
- * Read one row of pixels.
- * The image has been read into the whole_image array, but is otherwise
- * unprocessed. We must read it out in top-to-bottom row order, and if
- * it is an 8-bit image, we must expand colormapped pixels to 24bit format.
- */
-
-METHODDEF(JDIMENSION)
-get_8bit_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-/* This version is for reading 8-bit colormap indexes */
-{
- bmp_source_ptr source = (bmp_source_ptr) sinfo;
- register JSAMPARRAY colormap = source->colormap;
- JSAMPARRAY image_ptr;
- register int t;
- register JSAMPROW inptr, outptr;
- register JDIMENSION col;
-
- /* Fetch next row from virtual array */
- source->source_row--;
- image_ptr = (*cinfo->mem->access_virt_sarray)
- ((j_common_ptr) cinfo, source->whole_image,
- source->source_row, (JDIMENSION) 1, FALSE);
-
- /* Expand the colormap indexes to real data */
- inptr = image_ptr[0];
- outptr = source->pub.buffer[0];
- for (col = cinfo->image_width; col > 0; col--) {
- t = GETJSAMPLE(*inptr++);
- *outptr++ = colormap[0][t]; /* can omit GETJSAMPLE() safely */
- *outptr++ = colormap[1][t];
- *outptr++ = colormap[2][t];
- }
-
- return 1;
-}
-
-
-METHODDEF(JDIMENSION)
-get_24bit_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-/* This version is for reading 24-bit pixels */
-{
- bmp_source_ptr source = (bmp_source_ptr) sinfo;
- JSAMPARRAY image_ptr;
- register JSAMPROW inptr, outptr;
- register JDIMENSION col;
-
- /* Fetch next row from virtual array */
- source->source_row--;
- image_ptr = (*cinfo->mem->access_virt_sarray)
- ((j_common_ptr) cinfo, source->whole_image,
- source->source_row, (JDIMENSION) 1, FALSE);
-
- /* Transfer data. Note source values are in BGR order
- * (even though Microsoft's own documents say the opposite).
- */
- inptr = image_ptr[0];
- outptr = source->pub.buffer[0];
- for (col = cinfo->image_width; col > 0; col--) {
- outptr[2] = *inptr++; /* can omit GETJSAMPLE() safely */
- outptr[1] = *inptr++;
- outptr[0] = *inptr++;
- outptr += 3;
- }
-
- return 1;
-}
-
-
-/*
- * This method loads the image into whole_image during the first call on
- * get_pixel_rows. The get_pixel_rows pointer is then adjusted to call
- * get_8bit_row or get_24bit_row on subsequent calls.
- */
-
-METHODDEF(JDIMENSION)
-preload_image (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-{
- bmp_source_ptr source = (bmp_source_ptr) sinfo;
- register FILE *infile = source->pub.input_file;
- register int c;
- register JSAMPROW out_ptr;
- JSAMPARRAY image_ptr;
- JDIMENSION row, col;
- cd_progress_ptr progress = (cd_progress_ptr) cinfo->progress;
-
- /* Read the data into a virtual array in input-file row order. */
- for (row = 0; row < cinfo->image_height; row++) {
- if (progress != NULL) {
- progress->pub.pass_counter = (long) row;
- progress->pub.pass_limit = (long) cinfo->image_height;
- (*progress->pub.progress_monitor) ((j_common_ptr) cinfo);
- }
- image_ptr = (*cinfo->mem->access_virt_sarray)
- ((j_common_ptr) cinfo, source->whole_image,
- row, (JDIMENSION) 1, TRUE);
- out_ptr = image_ptr[0];
- for (col = source->row_width; col > 0; col--) {
- /* inline copy of read_byte() for speed */
- if ((c = getc(infile)) == EOF)
- ERREXIT(cinfo, JERR_INPUT_EOF);
- *out_ptr++ = (JSAMPLE) c;
- }
- }
- if (progress != NULL)
- progress->completed_extra_passes++;
-
- /* Set up to read from the virtual array in top-to-bottom order */
- switch (source->bits_per_pixel) {
- case 8:
- source->pub.get_pixel_rows = get_8bit_row;
- break;
- case 24:
- source->pub.get_pixel_rows = get_24bit_row;
- break;
- default:
- ERREXIT(cinfo, JERR_BMP_BADDEPTH);
- }
- source->source_row = cinfo->image_height;
-
- /* And read the first row */
- return (*source->pub.get_pixel_rows) (cinfo, sinfo);
-}
-
-
-/*
- * Read the file header; return image size and component count.
- */
-
-METHODDEF(void)
-start_input_bmp (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-{
- bmp_source_ptr source = (bmp_source_ptr) sinfo;
- U_CHAR bmpfileheader[14];
- U_CHAR bmpinfoheader[64];
-#define GET_2B(array,offset) ((unsigned int) UCH(array[offset]) + \
- (((unsigned int) UCH(array[offset+1])) << 8))
-#define GET_4B(array,offset) ((INT32) UCH(array[offset]) + \
- (((INT32) UCH(array[offset+1])) << 8) + \
- (((INT32) UCH(array[offset+2])) << 16) + \
- (((INT32) UCH(array[offset+3])) << 24))
- INT32 bfOffBits;
- INT32 headerSize;
- INT32 biWidth = 0; /* initialize to avoid compiler warning */
- INT32 biHeight = 0;
- unsigned int biPlanes;
- INT32 biCompression;
- INT32 biXPelsPerMeter,biYPelsPerMeter;
- INT32 biClrUsed = 0;
- int mapentrysize = 0; /* 0 indicates no colormap */
- INT32 bPad;
- JDIMENSION row_width;
-
- /* Read and verify the bitmap file header */
- if (! ReadOK(source->pub.input_file, bmpfileheader, 14))
- ERREXIT(cinfo, JERR_INPUT_EOF);
- if (GET_2B(bmpfileheader,0) != 0x4D42) /* 'BM' */
- ERREXIT(cinfo, JERR_BMP_NOT);
- bfOffBits = (INT32) GET_4B(bmpfileheader,10);
- /* We ignore the remaining fileheader fields */
-
- /* The infoheader might be 12 bytes (OS/2 1.x), 40 bytes (Windows),
- * or 64 bytes (OS/2 2.x). Check the first 4 bytes to find out which.
- */
- if (! ReadOK(source->pub.input_file, bmpinfoheader, 4))
- ERREXIT(cinfo, JERR_INPUT_EOF);
- headerSize = (INT32) GET_4B(bmpinfoheader,0);
- if (headerSize < 12 || headerSize > 64)
- ERREXIT(cinfo, JERR_BMP_BADHEADER);
- if (! ReadOK(source->pub.input_file, bmpinfoheader+4, headerSize-4))
- ERREXIT(cinfo, JERR_INPUT_EOF);
-
- switch ((int) headerSize) {
- case 12:
- /* Decode OS/2 1.x header (Microsoft calls this a BITMAPCOREHEADER) */
- biWidth = (INT32) GET_2B(bmpinfoheader,4);
- biHeight = (INT32) GET_2B(bmpinfoheader,6);
- biPlanes = GET_2B(bmpinfoheader,8);
- source->bits_per_pixel = (int) GET_2B(bmpinfoheader,10);
-
- switch (source->bits_per_pixel) {
- case 8: /* colormapped image */
- mapentrysize = 3; /* OS/2 uses RGBTRIPLE colormap */
- TRACEMS2(cinfo, 1, JTRC_BMP_OS2_MAPPED, (int) biWidth, (int) biHeight);
- break;
- case 24: /* RGB image */
- TRACEMS2(cinfo, 1, JTRC_BMP_OS2, (int) biWidth, (int) biHeight);
- break;
- default:
- ERREXIT(cinfo, JERR_BMP_BADDEPTH);
- break;
- }
- if (biPlanes != 1)
- ERREXIT(cinfo, JERR_BMP_BADPLANES);
- break;
- case 40:
- case 64:
- /* Decode Windows 3.x header (Microsoft calls this a BITMAPINFOHEADER) */
- /* or OS/2 2.x header, which has additional fields that we ignore */
- biWidth = GET_4B(bmpinfoheader,4);
- biHeight = GET_4B(bmpinfoheader,8);
- biPlanes = GET_2B(bmpinfoheader,12);
- source->bits_per_pixel = (int) GET_2B(bmpinfoheader,14);
- biCompression = GET_4B(bmpinfoheader,16);
- biXPelsPerMeter = GET_4B(bmpinfoheader,24);
- biYPelsPerMeter = GET_4B(bmpinfoheader,28);
- biClrUsed = GET_4B(bmpinfoheader,32);
- /* biSizeImage, biClrImportant fields are ignored */
-
- switch (source->bits_per_pixel) {
- case 8: /* colormapped image */
- mapentrysize = 4; /* Windows uses RGBQUAD colormap */
- TRACEMS2(cinfo, 1, JTRC_BMP_MAPPED, (int) biWidth, (int) biHeight);
- break;
- case 24: /* RGB image */
- TRACEMS2(cinfo, 1, JTRC_BMP, (int) biWidth, (int) biHeight);
- break;
- default:
- ERREXIT(cinfo, JERR_BMP_BADDEPTH);
- break;
- }
- if (biPlanes != 1)
- ERREXIT(cinfo, JERR_BMP_BADPLANES);
- if (biCompression != 0)
- ERREXIT(cinfo, JERR_BMP_COMPRESSED);
-
- if (biXPelsPerMeter > 0 && biYPelsPerMeter > 0) {
- /* Set JFIF density parameters from the BMP data */
- cinfo->X_density = (UINT16) (biXPelsPerMeter/100); /* 100 cm per meter */
- cinfo->Y_density = (UINT16) (biYPelsPerMeter/100);
- cinfo->density_unit = 2; /* dots/cm */
- }
- break;
- default:
- ERREXIT(cinfo, JERR_BMP_BADHEADER);
- break;
- }
-
- /* Compute distance to bitmap data --- will adjust for colormap below */
- bPad = bfOffBits - (headerSize + 14);
-
- /* Read the colormap, if any */
- if (mapentrysize > 0) {
- if (biClrUsed <= 0)
- biClrUsed = 256; /* assume it's 256 */
- else if (biClrUsed > 256)
- ERREXIT(cinfo, JERR_BMP_BADCMAP);
- /* Allocate space to store the colormap */
- source->colormap = (*cinfo->mem->alloc_sarray)
- ((j_common_ptr) cinfo, JPOOL_IMAGE,
- (JDIMENSION) biClrUsed, (JDIMENSION) 3);
- /* and read it from the file */
- read_colormap(source, (int) biClrUsed, mapentrysize);
- /* account for size of colormap */
- bPad -= biClrUsed * mapentrysize;
- }
-
- /* Skip any remaining pad bytes */
- if (bPad < 0) /* incorrect bfOffBits value? */
- ERREXIT(cinfo, JERR_BMP_BADHEADER);
- while (--bPad >= 0) {
- (void) read_byte(source);
- }
-
- /* Compute row width in file, including padding to 4-byte boundary */
- if (source->bits_per_pixel == 24)
- row_width = (JDIMENSION) (biWidth * 3);
- else
- row_width = (JDIMENSION) biWidth;
- while ((row_width & 3) != 0) row_width++;
- source->row_width = row_width;
-
- /* Allocate space for inversion array, prepare for preload pass */
- source->whole_image = (*cinfo->mem->request_virt_sarray)
- ((j_common_ptr) cinfo, JPOOL_IMAGE, FALSE,
- row_width, (JDIMENSION) biHeight, (JDIMENSION) 1);
- source->pub.get_pixel_rows = preload_image;
- if (cinfo->progress != NULL) {
- cd_progress_ptr progress = (cd_progress_ptr) cinfo->progress;
- progress->total_extra_passes++; /* count file input as separate pass */
- }
-
- /* Allocate one-row buffer for returned data */
- source->pub.buffer = (*cinfo->mem->alloc_sarray)
- ((j_common_ptr) cinfo, JPOOL_IMAGE,
- (JDIMENSION) (biWidth * 3), (JDIMENSION) 1);
- source->pub.buffer_height = 1;
-
- cinfo->in_color_space = JCS_RGB;
- cinfo->input_components = 3;
- cinfo->data_precision = 8;
- cinfo->image_width = (JDIMENSION) biWidth;
- cinfo->image_height = (JDIMENSION) biHeight;
-}
-
-
-/*
- * Finish up at the end of the file.
- */
-
-METHODDEF(void)
-finish_input_bmp (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-{
- /* no work */
-}
-
-
-/*
- * The module selection routine for BMP format input.
- */
-
-GLOBAL(cjpeg_source_ptr)
-jinit_read_bmp (j_compress_ptr cinfo)
-{
- bmp_source_ptr source;
-
- /* Create module interface object */
- source = (bmp_source_ptr)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
- SIZEOF(bmp_source_struct));
- source->cinfo = cinfo; /* make back link for subroutines */
- /* Fill in method ptrs, except get_pixel_rows which start_input sets */
- source->pub.start_input = start_input_bmp;
- source->pub.finish_input = finish_input_bmp;
-
- return (cjpeg_source_ptr) source;
-}
-
-#endif /* BMP_SUPPORTED */
+++ /dev/null
-/*
- * rdcolmap.c
- *
- * Copyright (C) 1994-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file implements djpeg's "-map file" switch. It reads a source image
- * and constructs a colormap to be supplied to the JPEG decompressor.
- *
- * Currently, these file formats are supported for the map file:
- * GIF: the contents of the GIF's global colormap are used.
- * PPM (either text or raw flavor): the entire file is read and
- * each unique pixel value is entered in the map.
- * Note that reading a large PPM file will be horrendously slow.
- * Typically, a PPM-format map file should contain just one pixel
- * of each desired color. Such a file can be extracted from an
- * ordinary image PPM file with ppmtomap(1).
- *
- * Rescaling a PPM that has a maxval unequal to MAXJSAMPLE is not
- * currently implemented.
- */
-
-#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
-
-#ifdef QUANT_2PASS_SUPPORTED /* otherwise can't quantize to supplied map */
-
-/* Portions of this code are based on the PBMPLUS library, which is:
-**
-** Copyright (C) 1988 by Jef Poskanzer.
-**
-** Permission to use, copy, modify, and distribute this software and its
-** documentation for any purpose and without fee is hereby granted, provided
-** that the above copyright notice appear in all copies and that both that
-** copyright notice and this permission notice appear in supporting
-** documentation. This software is provided "as is" without express or
-** implied warranty.
-*/
-
-
-/*
- * Add a (potentially) new color to the color map.
- */
-
-LOCAL(void)
-add_map_entry (j_decompress_ptr cinfo, int R, int G, int B)
-{
- JSAMPROW colormap0 = cinfo->colormap[0];
- JSAMPROW colormap1 = cinfo->colormap[1];
- JSAMPROW colormap2 = cinfo->colormap[2];
- int ncolors = cinfo->actual_number_of_colors;
- int index;
-
- /* Check for duplicate color. */
- for (index = 0; index < ncolors; index++) {
- if (GETJSAMPLE(colormap0[index]) == R &&
- GETJSAMPLE(colormap1[index]) == G &&
- GETJSAMPLE(colormap2[index]) == B)
- return; /* color is already in map */
- }
-
- /* Check for map overflow. */
- if (ncolors >= (MAXJSAMPLE+1))
- ERREXIT1(cinfo, JERR_QUANT_MANY_COLORS, (MAXJSAMPLE+1));
-
- /* OK, add color to map. */
- colormap0[ncolors] = (JSAMPLE) R;
- colormap1[ncolors] = (JSAMPLE) G;
- colormap2[ncolors] = (JSAMPLE) B;
- cinfo->actual_number_of_colors++;
-}
-
-
-/*
- * Extract color map from a GIF file.
- */
-
-LOCAL(void)
-read_gif_map (j_decompress_ptr cinfo, FILE * infile)
-{
- int header[13];
- int i, colormaplen;
- int R, G, B;
-
- /* Initial 'G' has already been read by read_color_map */
- /* Read the rest of the GIF header and logical screen descriptor */
- for (i = 1; i < 13; i++) {
- if ((header[i] = getc(infile)) == EOF)
- ERREXIT(cinfo, JERR_BAD_CMAP_FILE);
- }
-
- /* Verify GIF Header */
- if (header[1] != 'I' || header[2] != 'F')
- ERREXIT(cinfo, JERR_BAD_CMAP_FILE);
-
- /* There must be a global color map. */
- if ((header[10] & 0x80) == 0)
- ERREXIT(cinfo, JERR_BAD_CMAP_FILE);
-
- /* OK, fetch it. */
- colormaplen = 2 << (header[10] & 0x07);
-
- for (i = 0; i < colormaplen; i++) {
- R = getc(infile);
- G = getc(infile);
- B = getc(infile);
- if (R == EOF || G == EOF || B == EOF)
- ERREXIT(cinfo, JERR_BAD_CMAP_FILE);
- add_map_entry(cinfo,
- R << (BITS_IN_JSAMPLE-8),
- G << (BITS_IN_JSAMPLE-8),
- B << (BITS_IN_JSAMPLE-8));
- }
-}
-
-
-/* Support routines for reading PPM */
-
-
-LOCAL(int)
-pbm_getc (FILE * infile)
-/* Read next char, skipping over any comments */
-/* A comment/newline sequence is returned as a newline */
-{
- register int ch;
-
- ch = getc(infile);
- if (ch == '#') {
- do {
- ch = getc(infile);
- } while (ch != '\n' && ch != EOF);
- }
- return ch;
-}
-
-
-LOCAL(unsigned int)
-read_pbm_integer (j_decompress_ptr cinfo, FILE * infile)
-/* Read an unsigned decimal integer from the PPM file */
-/* Swallows one trailing character after the integer */
-/* Note that on a 16-bit-int machine, only values up to 64k can be read. */
-/* This should not be a problem in practice. */
-{
- register int ch;
- register unsigned int val;
-
- /* Skip any leading whitespace */
- do {
- ch = pbm_getc(infile);
- if (ch == EOF)
- ERREXIT(cinfo, JERR_BAD_CMAP_FILE);
- } while (ch == ' ' || ch == '\t' || ch == '\n' || ch == '\r');
-
- if (ch < '0' || ch > '9')
- ERREXIT(cinfo, JERR_BAD_CMAP_FILE);
-
- val = ch - '0';
- while ((ch = pbm_getc(infile)) >= '0' && ch <= '9') {
- val *= 10;
- val += ch - '0';
- }
- return val;
-}
-
-
-/*
- * Extract color map from a PPM file.
- */
-
-LOCAL(void)
-read_ppm_map (j_decompress_ptr cinfo, FILE * infile)
-{
- int c;
- unsigned int w, h, maxval, row, col;
- int R, G, B;
-
- /* Initial 'P' has already been read by read_color_map */
- c = getc(infile); /* save format discriminator for a sec */
-
- /* while we fetch the remaining header info */
- w = read_pbm_integer(cinfo, infile);
- h = read_pbm_integer(cinfo, infile);
- maxval = read_pbm_integer(cinfo, infile);
-
- if (w <= 0 || h <= 0 || maxval <= 0) /* error check */
- ERREXIT(cinfo, JERR_BAD_CMAP_FILE);
-
- /* For now, we don't support rescaling from an unusual maxval. */
- if (maxval != (unsigned int) MAXJSAMPLE)
- ERREXIT(cinfo, JERR_BAD_CMAP_FILE);
-
- switch (c) {
- case '3': /* it's a text-format PPM file */
- for (row = 0; row < h; row++) {
- for (col = 0; col < w; col++) {
- R = read_pbm_integer(cinfo, infile);
- G = read_pbm_integer(cinfo, infile);
- B = read_pbm_integer(cinfo, infile);
- add_map_entry(cinfo, R, G, B);
- }
- }
- break;
-
- case '6': /* it's a raw-format PPM file */
- for (row = 0; row < h; row++) {
- for (col = 0; col < w; col++) {
- R = getc(infile);
- G = getc(infile);
- B = getc(infile);
- if (R == EOF || G == EOF || B == EOF)
- ERREXIT(cinfo, JERR_BAD_CMAP_FILE);
- add_map_entry(cinfo, R, G, B);
- }
- }
- break;
-
- default:
- ERREXIT(cinfo, JERR_BAD_CMAP_FILE);
- break;
- }
-}
-
-
-/*
- * Main entry point from djpeg.c.
- * Input: opened input file (from file name argument on command line).
- * Output: colormap and actual_number_of_colors fields are set in cinfo.
- */
-
-GLOBAL(void)
-read_color_map (j_decompress_ptr cinfo, FILE * infile)
-{
- /* Allocate space for a color map of maximum supported size. */
- cinfo->colormap = (*cinfo->mem->alloc_sarray)
- ((j_common_ptr) cinfo, JPOOL_IMAGE,
- (JDIMENSION) (MAXJSAMPLE+1), (JDIMENSION) 3);
- cinfo->actual_number_of_colors = 0; /* initialize map to empty */
-
- /* Read first byte to determine file format */
- switch (getc(infile)) {
- case 'G':
- read_gif_map(cinfo, infile);
- break;
- case 'P':
- read_ppm_map(cinfo, infile);
- break;
- default:
- ERREXIT(cinfo, JERR_BAD_CMAP_FILE);
- break;
- }
-}
-
-#endif /* QUANT_2PASS_SUPPORTED */
+++ /dev/null
-/*
- * rdgif.c
- *
- * Copyright (C) 1991-1997, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains routines to read input images in GIF format.
- *
- *****************************************************************************
- * NOTE: to avoid entanglements with Unisys' patent on LZW compression, *
- * the ability to read GIF files has been removed from the IJG distribution. *
- * Sorry about that. *
- *****************************************************************************
- *
- * We are required to state that
- * "The Graphics Interchange Format(c) is the Copyright property of
- * CompuServe Incorporated. GIF(sm) is a Service Mark property of
- * CompuServe Incorporated."
- */
-
-#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
-
-#ifdef GIF_SUPPORTED
-
-/*
- * The module selection routine for GIF format input.
- */
-
-GLOBAL(cjpeg_source_ptr)
-jinit_read_gif (j_compress_ptr cinfo)
-{
- fprintf(stderr, "GIF input is unsupported for legal reasons. Sorry.\n");
- exit(EXIT_FAILURE);
- return NULL; /* keep compiler happy */
-}
-
-#endif /* GIF_SUPPORTED */
+++ /dev/null
-/*
- * rdjpgcom.c
- *
- * Copyright (C) 1994-1997, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains a very simple stand-alone application that displays
- * the text in COM (comment) markers in a JFIF file.
- * This may be useful as an example of the minimum logic needed to parse
- * JPEG markers.
- */
-
-#define JPEG_CJPEG_DJPEG /* to get the command-line config symbols */
-#include "jinclude.h" /* get auto-config symbols, <stdio.h> */
-
-#include <ctype.h> /* to declare isupper(), tolower() */
-#ifdef USE_SETMODE
-#include <fcntl.h> /* to declare setmode()'s parameter macros */
-/* If you have setmode() but not <io.h>, just delete this line: */
-#include <io.h> /* to declare setmode() */
-#endif
-
-#ifdef USE_CCOMMAND /* command-line reader for Macintosh */
-#ifdef __MWERKS__
-#include <SIOUX.h> /* Metrowerks needs this */
-#include <console.h> /* ... and this */
-#endif
-#ifdef THINK_C
-#include <console.h> /* Think declares it here */
-#endif
-#endif
-
-#ifdef DONT_USE_B_MODE /* define mode parameters for fopen() */
-#define READ_BINARY "r"
-#else
-#ifdef VMS /* VMS is very nonstandard */
-#define READ_BINARY "rb", "ctx=stm"
-#else /* standard ANSI-compliant case */
-#define READ_BINARY "rb"
-#endif
-#endif
-
-#ifndef EXIT_FAILURE /* define exit() codes if not provided */
-#define EXIT_FAILURE 1
-#endif
-#ifndef EXIT_SUCCESS
-#ifdef VMS
-#define EXIT_SUCCESS 1 /* VMS is very nonstandard */
-#else
-#define EXIT_SUCCESS 0
-#endif
-#endif
-
-
-/*
- * These macros are used to read the input file.
- * To reuse this code in another application, you might need to change these.
- */
-
-static FILE * infile; /* input JPEG file */
-
-/* Return next input byte, or EOF if no more */
-#define NEXTBYTE() getc(infile)
-
-
-/* Error exit handler */
-#define ERREXIT(msg) (fprintf(stderr, "%s\n", msg), exit(EXIT_FAILURE))
-
-
-/* Read one byte, testing for EOF */
-static int
-read_1_byte (void)
-{
- int c;
-
- c = NEXTBYTE();
- if (c == EOF)
- ERREXIT("Premature EOF in JPEG file");
- return c;
-}
-
-/* Read 2 bytes, convert to unsigned int */
-/* All 2-byte quantities in JPEG markers are MSB first */
-static unsigned int
-read_2_bytes (void)
-{
- int c1, c2;
-
- c1 = NEXTBYTE();
- if (c1 == EOF)
- ERREXIT("Premature EOF in JPEG file");
- c2 = NEXTBYTE();
- if (c2 == EOF)
- ERREXIT("Premature EOF in JPEG file");
- return (((unsigned int) c1) << 8) + ((unsigned int) c2);
-}
-
-
-/*
- * JPEG markers consist of one or more 0xFF bytes, followed by a marker
- * code byte (which is not an FF). Here are the marker codes of interest
- * in this program. (See jdmarker.c for a more complete list.)
- */
-
-#define M_SOF0 0xC0 /* Start Of Frame N */
-#define M_SOF1 0xC1 /* N indicates which compression process */
-#define M_SOF2 0xC2 /* Only SOF0-SOF2 are now in common use */
-#define M_SOF3 0xC3
-#define M_SOF5 0xC5 /* NB: codes C4 and CC are NOT SOF markers */
-#define M_SOF6 0xC6
-#define M_SOF7 0xC7
-#define M_SOF9 0xC9
-#define M_SOF10 0xCA
-#define M_SOF11 0xCB
-#define M_SOF13 0xCD
-#define M_SOF14 0xCE
-#define M_SOF15 0xCF
-#define M_SOI 0xD8 /* Start Of Image (beginning of datastream) */
-#define M_EOI 0xD9 /* End Of Image (end of datastream) */
-#define M_SOS 0xDA /* Start Of Scan (begins compressed data) */
-#define M_APP0 0xE0 /* Application-specific marker, type N */
-#define M_APP12 0xEC /* (we don't bother to list all 16 APPn's) */
-#define M_COM 0xFE /* COMment */
-
-
-/*
- * Find the next JPEG marker and return its marker code.
- * We expect at least one FF byte, possibly more if the compressor used FFs
- * to pad the file.
- * There could also be non-FF garbage between markers. The treatment of such
- * garbage is unspecified; we choose to skip over it but emit a warning msg.
- * NB: this routine must not be used after seeing SOS marker, since it will
- * not deal correctly with FF/00 sequences in the compressed image data...
- */
-
-static int
-next_marker (void)
-{
- int c;
- int discarded_bytes = 0;
-
- /* Find 0xFF byte; count and skip any non-FFs. */
- c = read_1_byte();
- while (c != 0xFF) {
- discarded_bytes++;
- c = read_1_byte();
- }
- /* Get marker code byte, swallowing any duplicate FF bytes. Extra FFs
- * are legal as pad bytes, so don't count them in discarded_bytes.
- */
- do {
- c = read_1_byte();
- } while (c == 0xFF);
-
- if (discarded_bytes != 0) {
- fprintf(stderr, "Warning: garbage data found in JPEG file\n");
- }
-
- return c;
-}
-
-
-/*
- * Read the initial marker, which should be SOI.
- * For a JFIF file, the first two bytes of the file should be literally
- * 0xFF M_SOI. To be more general, we could use next_marker, but if the
- * input file weren't actually JPEG at all, next_marker might read the whole
- * file and then return a misleading error message...
- */
-
-static int
-first_marker (void)
-{
- int c1, c2;
-
- c1 = NEXTBYTE();
- c2 = NEXTBYTE();
- if (c1 != 0xFF || c2 != M_SOI)
- ERREXIT("Not a JPEG file");
- return c2;
-}
-
-
-/*
- * Most types of marker are followed by a variable-length parameter segment.
- * This routine skips over the parameters for any marker we don't otherwise
- * want to process.
- * Note that we MUST skip the parameter segment explicitly in order not to
- * be fooled by 0xFF bytes that might appear within the parameter segment;
- * such bytes do NOT introduce new markers.
- */
-
-static void
-skip_variable (void)
-/* Skip over an unknown or uninteresting variable-length marker */
-{
- unsigned int length;
-
- /* Get the marker parameter length count */
- length = read_2_bytes();
- /* Length includes itself, so must be at least 2 */
- if (length < 2)
- ERREXIT("Erroneous JPEG marker length");
- length -= 2;
- /* Skip over the remaining bytes */
- while (length > 0) {
- (void) read_1_byte();
- length--;
- }
-}
-
-
-/*
- * Process a COM marker.
- * We want to print out the marker contents as legible text;
- * we must guard against non-text junk and varying newline representations.
- */
-
-static void
-process_COM (void)
-{
- unsigned int length;
- int ch;
- int lastch = 0;
-
- /* Get the marker parameter length count */
- length = read_2_bytes();
- /* Length includes itself, so must be at least 2 */
- if (length < 2)
- ERREXIT("Erroneous JPEG marker length");
- length -= 2;
-
- while (length > 0) {
- ch = read_1_byte();
- /* Emit the character in a readable form.
- * Nonprintables are converted to \nnn form,
- * while \ is converted to \\.
- * Newlines in CR, CR/LF, or LF form will be printed as one newline.
- */
- if (ch == '\r') {
- printf("\n");
- } else if (ch == '\n') {
- if (lastch != '\r')
- printf("\n");
- } else if (ch == '\\') {
- printf("\\\\");
- } else if (isprint(ch)) {
- putc(ch, stdout);
- } else {
- printf("\\%03o", ch);
- }
- lastch = ch;
- length--;
- }
- printf("\n");
-}
-
-
-/*
- * Process a SOFn marker.
- * This code is only needed if you want to know the image dimensions...
- */
-
-static void
-process_SOFn (int marker)
-{
- unsigned int length;
- unsigned int image_height, image_width;
- int data_precision, num_components;
- const char * process;
- int ci;
-
- length = read_2_bytes(); /* usual parameter length count */
-
- data_precision = read_1_byte();
- image_height = read_2_bytes();
- image_width = read_2_bytes();
- num_components = read_1_byte();
-
- switch (marker) {
- case M_SOF0: process = "Baseline"; break;
- case M_SOF1: process = "Extended sequential"; break;
- case M_SOF2: process = "Progressive"; break;
- case M_SOF3: process = "Lossless"; break;
- case M_SOF5: process = "Differential sequential"; break;
- case M_SOF6: process = "Differential progressive"; break;
- case M_SOF7: process = "Differential lossless"; break;
- case M_SOF9: process = "Extended sequential, arithmetic coding"; break;
- case M_SOF10: process = "Progressive, arithmetic coding"; break;
- case M_SOF11: process = "Lossless, arithmetic coding"; break;
- case M_SOF13: process = "Differential sequential, arithmetic coding"; break;
- case M_SOF14: process = "Differential progressive, arithmetic coding"; break;
- case M_SOF15: process = "Differential lossless, arithmetic coding"; break;
- default: process = "Unknown"; break;
- }
-
- printf("JPEG image is %uw * %uh, %d color components, %d bits per sample\n",
- image_width, image_height, num_components, data_precision);
- printf("JPEG process: %s\n", process);
-
- if (length != (unsigned int) (8 + num_components * 3))
- ERREXIT("Bogus SOF marker length");
-
- for (ci = 0; ci < num_components; ci++) {
- (void) read_1_byte(); /* Component ID code */
- (void) read_1_byte(); /* H, V sampling factors */
- (void) read_1_byte(); /* Quantization table number */
- }
-}
-
-
-/*
- * Parse the marker stream until SOS or EOI is seen;
- * display any COM markers.
- * While the companion program wrjpgcom will always insert COM markers before
- * SOFn, other implementations might not, so we scan to SOS before stopping.
- * If we were only interested in the image dimensions, we would stop at SOFn.
- * (Conversely, if we only cared about COM markers, there would be no need
- * for special code to handle SOFn; we could treat it like other markers.)
- */
-
-static int
-scan_JPEG_header (int verbose)
-{
- int marker;
-
- /* Expect SOI at start of file */
- if (first_marker() != M_SOI)
- ERREXIT("Expected SOI marker first");
-
- /* Scan miscellaneous markers until we reach SOS. */
- for (;;) {
- marker = next_marker();
- switch (marker) {
- /* Note that marker codes 0xC4, 0xC8, 0xCC are not, and must not be,
- * treated as SOFn. C4 in particular is actually DHT.
- */
- case M_SOF0: /* Baseline */
- case M_SOF1: /* Extended sequential, Huffman */
- case M_SOF2: /* Progressive, Huffman */
- case M_SOF3: /* Lossless, Huffman */
- case M_SOF5: /* Differential sequential, Huffman */
- case M_SOF6: /* Differential progressive, Huffman */
- case M_SOF7: /* Differential lossless, Huffman */
- case M_SOF9: /* Extended sequential, arithmetic */
- case M_SOF10: /* Progressive, arithmetic */
- case M_SOF11: /* Lossless, arithmetic */
- case M_SOF13: /* Differential sequential, arithmetic */
- case M_SOF14: /* Differential progressive, arithmetic */
- case M_SOF15: /* Differential lossless, arithmetic */
- if (verbose)
- process_SOFn(marker);
- else
- skip_variable();
- break;
-
- case M_SOS: /* stop before hitting compressed data */
- return marker;
-
- case M_EOI: /* in case it's a tables-only JPEG stream */
- return marker;
-
- case M_COM:
- process_COM();
- break;
-
- case M_APP12:
- /* Some digital camera makers put useful textual information into
- * APP12 markers, so we print those out too when in -verbose mode.
- */
- if (verbose) {
- printf("APP12 contains:\n");
- process_COM();
- } else
- skip_variable();
- break;
-
- default: /* Anything else just gets skipped */
- skip_variable(); /* we assume it has a parameter count... */
- break;
- }
- } /* end loop */
-}
-
-
-/* Command line parsing code */
-
-static const char * progname; /* program name for error messages */
-
-
-static void
-usage (void)
-/* complain about bad command line */
-{
- fprintf(stderr, "rdjpgcom displays any textual comments in a JPEG file.\n");
-
- fprintf(stderr, "Usage: %s [switches] [inputfile]\n", progname);
-
- fprintf(stderr, "Switches (names may be abbreviated):\n");
- fprintf(stderr, " -verbose Also display dimensions of JPEG image\n");
-
- exit(EXIT_FAILURE);
-}
-
-
-static int
-keymatch (char * arg, const char * keyword, int minchars)
-/* Case-insensitive matching of (possibly abbreviated) keyword switches. */
-/* keyword is the constant keyword (must be lower case already), */
-/* minchars is length of minimum legal abbreviation. */
-{
- register int ca, ck;
- register int nmatched = 0;
-
- while ((ca = *arg++) != '\0') {
- if ((ck = *keyword++) == '\0')
- return 0; /* arg longer than keyword, no good */
- if (isupper(ca)) /* force arg to lcase (assume ck is already) */
- ca = tolower(ca);
- if (ca != ck)
- return 0; /* no good */
- nmatched++; /* count matched characters */
- }
- /* reached end of argument; fail if it's too short for unique abbrev */
- if (nmatched < minchars)
- return 0;
- return 1; /* A-OK */
-}
-
-
-/*
- * The main program.
- */
-
-int
-main (int argc, char **argv)
-{
- int argn;
- char * arg;
- int verbose = 0;
-
- /* On Mac, fetch a command line. */
-#ifdef USE_CCOMMAND
- argc = ccommand(&argv);
-#endif
-
- progname = argv[0];
- if (progname == NULL || progname[0] == 0)
- progname = "rdjpgcom"; /* in case C library doesn't provide it */
-
- /* Parse switches, if any */
- for (argn = 1; argn < argc; argn++) {
- arg = argv[argn];
- if (arg[0] != '-')
- break; /* not switch, must be file name */
- arg++; /* advance over '-' */
- if (keymatch(arg, "verbose", 1)) {
- verbose++;
- } else
- usage();
- }
-
- /* Open the input file. */
- /* Unix style: expect zero or one file name */
- if (argn < argc-1) {
- fprintf(stderr, "%s: only one input file\n", progname);
- usage();
- }
- if (argn < argc) {
- if ((infile = fopen(argv[argn], READ_BINARY)) == NULL) {
- fprintf(stderr, "%s: can't open %s\n", progname, argv[argn]);
- exit(EXIT_FAILURE);
- }
- } else {
- /* default input file is stdin */
-#ifdef USE_SETMODE /* need to hack file mode? */
- setmode(fileno(stdin), O_BINARY);
-#endif
-#ifdef USE_FDOPEN /* need to re-open in binary mode? */
- if ((infile = fdopen(fileno(stdin), READ_BINARY)) == NULL) {
- fprintf(stderr, "%s: can't open stdin\n", progname);
- exit(EXIT_FAILURE);
- }
-#else
- infile = stdin;
-#endif
- }
-
- /* Scan the JPEG headers. */
- (void) scan_JPEG_header(verbose);
-
- /* All done. */
- exit(EXIT_SUCCESS);
- return 0; /* suppress no-return-value warnings */
-}
+++ /dev/null
-/*
- * rdppm.c
- *
- * Copyright (C) 1991-1997, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains routines to read input images in PPM/PGM format.
- * The extended 2-byte-per-sample raw PPM/PGM formats are supported.
- * The PBMPLUS library is NOT required to compile this software
- * (but it is highly useful as a set of PPM image manipulation programs).
- *
- * These routines may need modification for non-Unix environments or
- * specialized applications. As they stand, they assume input from
- * an ordinary stdio stream. They further assume that reading begins
- * at the start of the file; start_input may need work if the
- * user interface has already read some data (e.g., to determine that
- * the file is indeed PPM format).
- */
-
-#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
-
-#ifdef PPM_SUPPORTED
-
-
-/* Portions of this code are based on the PBMPLUS library, which is:
-**
-** Copyright (C) 1988 by Jef Poskanzer.
-**
-** Permission to use, copy, modify, and distribute this software and its
-** documentation for any purpose and without fee is hereby granted, provided
-** that the above copyright notice appear in all copies and that both that
-** copyright notice and this permission notice appear in supporting
-** documentation. This software is provided "as is" without express or
-** implied warranty.
-*/
-
-
-/* Macros to deal with unsigned chars as efficiently as compiler allows */
-
-#ifdef HAVE_UNSIGNED_CHAR
-typedef unsigned char U_CHAR;
-#define UCH(x) ((int) (x))
-#else /* !HAVE_UNSIGNED_CHAR */
-#ifdef CHAR_IS_UNSIGNED
-typedef char U_CHAR;
-#define UCH(x) ((int) (x))
-#else
-typedef char U_CHAR;
-#define UCH(x) ((int) (x) & 0xFF)
-#endif
-#endif /* HAVE_UNSIGNED_CHAR */
-
-
-#define ReadOK(file,buffer,len) (JFREAD(file,buffer,len) == ((size_t) (len)))
-
-
-/*
- * On most systems, reading individual bytes with getc() is drastically less
- * efficient than buffering a row at a time with fread(). On PCs, we must
- * allocate the buffer in near data space, because we are assuming small-data
- * memory model, wherein fread() can't reach far memory. If you need to
- * process very wide images on a PC, you might have to compile in large-memory
- * model, or else replace fread() with a getc() loop --- which will be much
- * slower.
- */
-
-
-/* Private version of data source object */
-
-typedef struct {
- struct cjpeg_source_struct pub; /* public fields */
-
- U_CHAR *iobuffer; /* non-FAR pointer to I/O buffer */
- JSAMPROW pixrow; /* FAR pointer to same */
- size_t buffer_width; /* width of I/O buffer */
- JSAMPLE *rescale; /* => maxval-remapping array, or NULL */
-} ppm_source_struct;
-
-typedef ppm_source_struct * ppm_source_ptr;
-
-
-LOCAL(int)
-pbm_getc (FILE * infile)
-/* Read next char, skipping over any comments */
-/* A comment/newline sequence is returned as a newline */
-{
- register int ch;
-
- ch = getc(infile);
- if (ch == '#') {
- do {
- ch = getc(infile);
- } while (ch != '\n' && ch != EOF);
- }
- return ch;
-}
-
-
-LOCAL(unsigned int)
-read_pbm_integer (j_compress_ptr cinfo, FILE * infile)
-/* Read an unsigned decimal integer from the PPM file */
-/* Swallows one trailing character after the integer */
-/* Note that on a 16-bit-int machine, only values up to 64k can be read. */
-/* This should not be a problem in practice. */
-{
- register int ch;
- register unsigned int val;
-
- /* Skip any leading whitespace */
- do {
- ch = pbm_getc(infile);
- if (ch == EOF)
- ERREXIT(cinfo, JERR_INPUT_EOF);
- } while (ch == ' ' || ch == '\t' || ch == '\n' || ch == '\r');
-
- if (ch < '0' || ch > '9')
- ERREXIT(cinfo, JERR_PPM_NONNUMERIC);
-
- val = ch - '0';
- while ((ch = pbm_getc(infile)) >= '0' && ch <= '9') {
- val *= 10;
- val += ch - '0';
- }
- return val;
-}
-
-
-/*
- * Read one row of pixels.
- *
- * We provide several different versions depending on input file format.
- * In all cases, input is scaled to the size of JSAMPLE.
- *
- * A really fast path is provided for reading byte/sample raw files with
- * maxval = MAXJSAMPLE, which is the normal case for 8-bit data.
- */
-
-
-METHODDEF(JDIMENSION)
-get_text_gray_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-/* This version is for reading text-format PGM files with any maxval */
-{
- ppm_source_ptr source = (ppm_source_ptr) sinfo;
- FILE * infile = source->pub.input_file;
- register JSAMPROW ptr;
- register JSAMPLE *rescale = source->rescale;
- JDIMENSION col;
-
- ptr = source->pub.buffer[0];
- for (col = cinfo->image_width; col > 0; col--) {
- *ptr++ = rescale[read_pbm_integer(cinfo, infile)];
- }
- return 1;
-}
-
-
-METHODDEF(JDIMENSION)
-get_text_rgb_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-/* This version is for reading text-format PPM files with any maxval */
-{
- ppm_source_ptr source = (ppm_source_ptr) sinfo;
- FILE * infile = source->pub.input_file;
- register JSAMPROW ptr;
- register JSAMPLE *rescale = source->rescale;
- JDIMENSION col;
-
- ptr = source->pub.buffer[0];
- for (col = cinfo->image_width; col > 0; col--) {
- *ptr++ = rescale[read_pbm_integer(cinfo, infile)];
- *ptr++ = rescale[read_pbm_integer(cinfo, infile)];
- *ptr++ = rescale[read_pbm_integer(cinfo, infile)];
- }
- return 1;
-}
-
-
-METHODDEF(JDIMENSION)
-get_scaled_gray_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-/* This version is for reading raw-byte-format PGM files with any maxval */
-{
- ppm_source_ptr source = (ppm_source_ptr) sinfo;
- register JSAMPROW ptr;
- register U_CHAR * bufferptr;
- register JSAMPLE *rescale = source->rescale;
- JDIMENSION col;
-
- if (! ReadOK(source->pub.input_file, source->iobuffer, source->buffer_width))
- ERREXIT(cinfo, JERR_INPUT_EOF);
- ptr = source->pub.buffer[0];
- bufferptr = source->iobuffer;
- for (col = cinfo->image_width; col > 0; col--) {
- *ptr++ = rescale[UCH(*bufferptr++)];
- }
- return 1;
-}
-
-
-METHODDEF(JDIMENSION)
-get_scaled_rgb_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-/* This version is for reading raw-byte-format PPM files with any maxval */
-{
- ppm_source_ptr source = (ppm_source_ptr) sinfo;
- register JSAMPROW ptr;
- register U_CHAR * bufferptr;
- register JSAMPLE *rescale = source->rescale;
- JDIMENSION col;
-
- if (! ReadOK(source->pub.input_file, source->iobuffer, source->buffer_width))
- ERREXIT(cinfo, JERR_INPUT_EOF);
- ptr = source->pub.buffer[0];
- bufferptr = source->iobuffer;
- for (col = cinfo->image_width; col > 0; col--) {
- *ptr++ = rescale[UCH(*bufferptr++)];
- *ptr++ = rescale[UCH(*bufferptr++)];
- *ptr++ = rescale[UCH(*bufferptr++)];
- }
- return 1;
-}
-
-
-METHODDEF(JDIMENSION)
-get_raw_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-/* This version is for reading raw-byte-format files with maxval = MAXJSAMPLE.
- * In this case we just read right into the JSAMPLE buffer!
- * Note that same code works for PPM and PGM files.
- */
-{
- ppm_source_ptr source = (ppm_source_ptr) sinfo;
-
- if (! ReadOK(source->pub.input_file, source->iobuffer, source->buffer_width))
- ERREXIT(cinfo, JERR_INPUT_EOF);
- return 1;
-}
-
-
-METHODDEF(JDIMENSION)
-get_word_gray_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-/* This version is for reading raw-word-format PGM files with any maxval */
-{
- ppm_source_ptr source = (ppm_source_ptr) sinfo;
- register JSAMPROW ptr;
- register U_CHAR * bufferptr;
- register JSAMPLE *rescale = source->rescale;
- JDIMENSION col;
-
- if (! ReadOK(source->pub.input_file, source->iobuffer, source->buffer_width))
- ERREXIT(cinfo, JERR_INPUT_EOF);
- ptr = source->pub.buffer[0];
- bufferptr = source->iobuffer;
- for (col = cinfo->image_width; col > 0; col--) {
- register int temp;
- temp = UCH(*bufferptr++);
- temp |= UCH(*bufferptr++) << 8;
- *ptr++ = rescale[temp];
- }
- return 1;
-}
-
-
-METHODDEF(JDIMENSION)
-get_word_rgb_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-/* This version is for reading raw-word-format PPM files with any maxval */
-{
- ppm_source_ptr source = (ppm_source_ptr) sinfo;
- register JSAMPROW ptr;
- register U_CHAR * bufferptr;
- register JSAMPLE *rescale = source->rescale;
- JDIMENSION col;
-
- if (! ReadOK(source->pub.input_file, source->iobuffer, source->buffer_width))
- ERREXIT(cinfo, JERR_INPUT_EOF);
- ptr = source->pub.buffer[0];
- bufferptr = source->iobuffer;
- for (col = cinfo->image_width; col > 0; col--) {
- register int temp;
- temp = UCH(*bufferptr++);
- temp |= UCH(*bufferptr++) << 8;
- *ptr++ = rescale[temp];
- temp = UCH(*bufferptr++);
- temp |= UCH(*bufferptr++) << 8;
- *ptr++ = rescale[temp];
- temp = UCH(*bufferptr++);
- temp |= UCH(*bufferptr++) << 8;
- *ptr++ = rescale[temp];
- }
- return 1;
-}
-
-
-/*
- * Read the file header; return image size and component count.
- */
-
-METHODDEF(void)
-start_input_ppm (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-{
- ppm_source_ptr source = (ppm_source_ptr) sinfo;
- int c;
- unsigned int w, h, maxval;
- boolean need_iobuffer, use_raw_buffer, need_rescale;
-
- if (getc(source->pub.input_file) != 'P')
- ERREXIT(cinfo, JERR_PPM_NOT);
-
- c = getc(source->pub.input_file); /* subformat discriminator character */
-
- /* detect unsupported variants (ie, PBM) before trying to read header */
- switch (c) {
- case '2': /* it's a text-format PGM file */
- case '3': /* it's a text-format PPM file */
- case '5': /* it's a raw-format PGM file */
- case '6': /* it's a raw-format PPM file */
- break;
- default:
- ERREXIT(cinfo, JERR_PPM_NOT);
- break;
- }
-
- /* fetch the remaining header info */
- w = read_pbm_integer(cinfo, source->pub.input_file);
- h = read_pbm_integer(cinfo, source->pub.input_file);
- maxval = read_pbm_integer(cinfo, source->pub.input_file);
-
- if (w <= 0 || h <= 0 || maxval <= 0) /* error check */
- ERREXIT(cinfo, JERR_PPM_NOT);
-
- cinfo->data_precision = BITS_IN_JSAMPLE; /* we always rescale data to this */
- cinfo->image_width = (JDIMENSION) w;
- cinfo->image_height = (JDIMENSION) h;
-
- /* initialize flags to most common settings */
- need_iobuffer = TRUE; /* do we need an I/O buffer? */
- use_raw_buffer = FALSE; /* do we map input buffer onto I/O buffer? */
- need_rescale = TRUE; /* do we need a rescale array? */
-
- switch (c) {
- case '2': /* it's a text-format PGM file */
- cinfo->input_components = 1;
- cinfo->in_color_space = JCS_GRAYSCALE;
- TRACEMS2(cinfo, 1, JTRC_PGM_TEXT, w, h);
- source->pub.get_pixel_rows = get_text_gray_row;
- need_iobuffer = FALSE;
- break;
-
- case '3': /* it's a text-format PPM file */
- cinfo->input_components = 3;
- cinfo->in_color_space = JCS_RGB;
- TRACEMS2(cinfo, 1, JTRC_PPM_TEXT, w, h);
- source->pub.get_pixel_rows = get_text_rgb_row;
- need_iobuffer = FALSE;
- break;
-
- case '5': /* it's a raw-format PGM file */
- cinfo->input_components = 1;
- cinfo->in_color_space = JCS_GRAYSCALE;
- TRACEMS2(cinfo, 1, JTRC_PGM, w, h);
- if (maxval > 255) {
- source->pub.get_pixel_rows = get_word_gray_row;
- } else if (maxval == MAXJSAMPLE && SIZEOF(JSAMPLE) == SIZEOF(U_CHAR)) {
- source->pub.get_pixel_rows = get_raw_row;
- use_raw_buffer = TRUE;
- need_rescale = FALSE;
- } else {
- source->pub.get_pixel_rows = get_scaled_gray_row;
- }
- break;
-
- case '6': /* it's a raw-format PPM file */
- cinfo->input_components = 3;
- cinfo->in_color_space = JCS_RGB;
- TRACEMS2(cinfo, 1, JTRC_PPM, w, h);
- if (maxval > 255) {
- source->pub.get_pixel_rows = get_word_rgb_row;
- } else if (maxval == MAXJSAMPLE && SIZEOF(JSAMPLE) == SIZEOF(U_CHAR)) {
- source->pub.get_pixel_rows = get_raw_row;
- use_raw_buffer = TRUE;
- need_rescale = FALSE;
- } else {
- source->pub.get_pixel_rows = get_scaled_rgb_row;
- }
- break;
- }
-
- /* Allocate space for I/O buffer: 1 or 3 bytes or words/pixel. */
- if (need_iobuffer) {
- source->buffer_width = (size_t) w * cinfo->input_components *
- ((maxval<=255) ? SIZEOF(U_CHAR) : (2*SIZEOF(U_CHAR)));
- source->iobuffer = (U_CHAR *)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
- source->buffer_width);
- }
-
- /* Create compressor input buffer. */
- if (use_raw_buffer) {
- /* For unscaled raw-input case, we can just map it onto the I/O buffer. */
- /* Synthesize a JSAMPARRAY pointer structure */
- /* Cast here implies near->far pointer conversion on PCs */
- source->pixrow = (JSAMPROW) source->iobuffer;
- source->pub.buffer = & source->pixrow;
- source->pub.buffer_height = 1;
- } else {
- /* Need to translate anyway, so make a separate sample buffer. */
- source->pub.buffer = (*cinfo->mem->alloc_sarray)
- ((j_common_ptr) cinfo, JPOOL_IMAGE,
- (JDIMENSION) w * cinfo->input_components, (JDIMENSION) 1);
- source->pub.buffer_height = 1;
- }
-
- /* Compute the rescaling array if required. */
- if (need_rescale) {
- INT32 val, half_maxval;
-
- /* On 16-bit-int machines we have to be careful of maxval = 65535 */
- source->rescale = (JSAMPLE *)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
- (size_t) (((long) maxval + 1L) * SIZEOF(JSAMPLE)));
- half_maxval = maxval / 2;
- for (val = 0; val <= (INT32) maxval; val++) {
- /* The multiplication here must be done in 32 bits to avoid overflow */
- source->rescale[val] = (JSAMPLE) ((val*MAXJSAMPLE + half_maxval)/maxval);
- }
- }
-}
-
-
-/*
- * Finish up at the end of the file.
- */
-
-METHODDEF(void)
-finish_input_ppm (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-{
- /* no work */
-}
-
-
-/*
- * The module selection routine for PPM format input.
- */
-
-GLOBAL(cjpeg_source_ptr)
-jinit_read_ppm (j_compress_ptr cinfo)
-{
- ppm_source_ptr source;
-
- /* Create module interface object */
- source = (ppm_source_ptr)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
- SIZEOF(ppm_source_struct));
- /* Fill in method ptrs, except get_pixel_rows which start_input sets */
- source->pub.start_input = start_input_ppm;
- source->pub.finish_input = finish_input_ppm;
-
- return (cjpeg_source_ptr) source;
-}
-
-#endif /* PPM_SUPPORTED */
+++ /dev/null
-/*
- * rdrle.c
- *
- * Copyright (C) 1991-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains routines to read input images in Utah RLE format.
- * The Utah Raster Toolkit library is required (version 3.1 or later).
- *
- * These routines may need modification for non-Unix environments or
- * specialized applications. As they stand, they assume input from
- * an ordinary stdio stream. They further assume that reading begins
- * at the start of the file; start_input may need work if the
- * user interface has already read some data (e.g., to determine that
- * the file is indeed RLE format).
- *
- * Based on code contributed by Mike Lijewski,
- * with updates from Robert Hutchinson.
- */
-
-#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
-
-#ifdef RLE_SUPPORTED
-
-/* rle.h is provided by the Utah Raster Toolkit. */
-
-#include <rle.h>
-
-/*
- * We assume that JSAMPLE has the same representation as rle_pixel,
- * to wit, "unsigned char". Hence we can't cope with 12- or 16-bit samples.
- */
-
-#if BITS_IN_JSAMPLE != 8
- Sorry, this code only copes with 8-bit JSAMPLEs. /* deliberate syntax err */
-#endif
-
-/*
- * We support the following types of RLE files:
- *
- * GRAYSCALE - 8 bits, no colormap
- * MAPPEDGRAY - 8 bits, 1 channel colomap
- * PSEUDOCOLOR - 8 bits, 3 channel colormap
- * TRUECOLOR - 24 bits, 3 channel colormap
- * DIRECTCOLOR - 24 bits, no colormap
- *
- * For now, we ignore any alpha channel in the image.
- */
-
-typedef enum
- { GRAYSCALE, MAPPEDGRAY, PSEUDOCOLOR, TRUECOLOR, DIRECTCOLOR } rle_kind;
-
-
-/*
- * Since RLE stores scanlines bottom-to-top, we have to invert the image
- * to conform to JPEG's top-to-bottom order. To do this, we read the
- * incoming image into a virtual array on the first get_pixel_rows call,
- * then fetch the required row from the virtual array on subsequent calls.
- */
-
-typedef struct _rle_source_struct * rle_source_ptr;
-
-typedef struct _rle_source_struct {
- struct cjpeg_source_struct pub; /* public fields */
-
- rle_kind visual; /* actual type of input file */
- jvirt_sarray_ptr image; /* virtual array to hold the image */
- JDIMENSION row; /* current row # in the virtual array */
- rle_hdr header; /* Input file information */
- rle_pixel** rle_row; /* holds a row returned by rle_getrow() */
-
-} rle_source_struct;
-
-
-/*
- * Read the file header; return image size and component count.
- */
-
-METHODDEF(void)
-start_input_rle (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-{
- rle_source_ptr source = (rle_source_ptr) sinfo;
- JDIMENSION width, height;
-#ifdef PROGRESS_REPORT
- cd_progress_ptr progress = (cd_progress_ptr) cinfo->progress;
-#endif
-
- /* Use RLE library routine to get the header info */
- source->header = *rle_hdr_init(NULL);
- source->header.rle_file = source->pub.input_file;
- switch (rle_get_setup(&(source->header))) {
- case RLE_SUCCESS:
- /* A-OK */
- break;
- case RLE_NOT_RLE:
- ERREXIT(cinfo, JERR_RLE_NOT);
- break;
- case RLE_NO_SPACE:
- ERREXIT(cinfo, JERR_RLE_MEM);
- break;
- case RLE_EMPTY:
- ERREXIT(cinfo, JERR_RLE_EMPTY);
- break;
- case RLE_EOF:
- ERREXIT(cinfo, JERR_RLE_EOF);
- break;
- default:
- ERREXIT(cinfo, JERR_RLE_BADERROR);
- break;
- }
-
- /* Figure out what we have, set private vars and return values accordingly */
-
- width = source->header.xmax - source->header.xmin + 1;
- height = source->header.ymax - source->header.ymin + 1;
- source->header.xmin = 0; /* realign horizontally */
- source->header.xmax = width-1;
-
- cinfo->image_width = width;
- cinfo->image_height = height;
- cinfo->data_precision = 8; /* we can only handle 8 bit data */
-
- if (source->header.ncolors == 1 && source->header.ncmap == 0) {
- source->visual = GRAYSCALE;
- TRACEMS2(cinfo, 1, JTRC_RLE_GRAY, width, height);
- } else if (source->header.ncolors == 1 && source->header.ncmap == 1) {
- source->visual = MAPPEDGRAY;
- TRACEMS3(cinfo, 1, JTRC_RLE_MAPGRAY, width, height,
- 1 << source->header.cmaplen);
- } else if (source->header.ncolors == 1 && source->header.ncmap == 3) {
- source->visual = PSEUDOCOLOR;
- TRACEMS3(cinfo, 1, JTRC_RLE_MAPPED, width, height,
- 1 << source->header.cmaplen);
- } else if (source->header.ncolors == 3 && source->header.ncmap == 3) {
- source->visual = TRUECOLOR;
- TRACEMS3(cinfo, 1, JTRC_RLE_FULLMAP, width, height,
- 1 << source->header.cmaplen);
- } else if (source->header.ncolors == 3 && source->header.ncmap == 0) {
- source->visual = DIRECTCOLOR;
- TRACEMS2(cinfo, 1, JTRC_RLE, width, height);
- } else
- ERREXIT(cinfo, JERR_RLE_UNSUPPORTED);
-
- if (source->visual == GRAYSCALE || source->visual == MAPPEDGRAY) {
- cinfo->in_color_space = JCS_GRAYSCALE;
- cinfo->input_components = 1;
- } else {
- cinfo->in_color_space = JCS_RGB;
- cinfo->input_components = 3;
- }
-
- /*
- * A place to hold each scanline while it's converted.
- * (GRAYSCALE scanlines don't need converting)
- */
- if (source->visual != GRAYSCALE) {
- source->rle_row = (rle_pixel**) (*cinfo->mem->alloc_sarray)
- ((j_common_ptr) cinfo, JPOOL_IMAGE,
- (JDIMENSION) width, (JDIMENSION) cinfo->input_components);
- }
-
- /* request a virtual array to hold the image */
- source->image = (*cinfo->mem->request_virt_sarray)
- ((j_common_ptr) cinfo, JPOOL_IMAGE, FALSE,
- (JDIMENSION) (width * source->header.ncolors),
- (JDIMENSION) height, (JDIMENSION) 1);
-
-#ifdef PROGRESS_REPORT
- if (progress != NULL) {
- /* count file input as separate pass */
- progress->total_extra_passes++;
- }
-#endif
-
- source->pub.buffer_height = 1;
-}
-
-
-/*
- * Read one row of pixels.
- * Called only after load_image has read the image into the virtual array.
- * Used for GRAYSCALE, MAPPEDGRAY, TRUECOLOR, and DIRECTCOLOR images.
- */
-
-METHODDEF(JDIMENSION)
-get_rle_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-{
- rle_source_ptr source = (rle_source_ptr) sinfo;
-
- source->row--;
- source->pub.buffer = (*cinfo->mem->access_virt_sarray)
- ((j_common_ptr) cinfo, source->image, source->row, (JDIMENSION) 1, FALSE);
-
- return 1;
-}
-
-/*
- * Read one row of pixels.
- * Called only after load_image has read the image into the virtual array.
- * Used for PSEUDOCOLOR images.
- */
-
-METHODDEF(JDIMENSION)
-get_pseudocolor_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-{
- rle_source_ptr source = (rle_source_ptr) sinfo;
- JSAMPROW src_row, dest_row;
- JDIMENSION col;
- rle_map *colormap;
- int val;
-
- colormap = source->header.cmap;
- dest_row = source->pub.buffer[0];
- source->row--;
- src_row = * (*cinfo->mem->access_virt_sarray)
- ((j_common_ptr) cinfo, source->image, source->row, (JDIMENSION) 1, FALSE);
-
- for (col = cinfo->image_width; col > 0; col--) {
- val = GETJSAMPLE(*src_row++);
- *dest_row++ = (JSAMPLE) (colormap[val ] >> 8);
- *dest_row++ = (JSAMPLE) (colormap[val + 256] >> 8);
- *dest_row++ = (JSAMPLE) (colormap[val + 512] >> 8);
- }
-
- return 1;
-}
-
-
-/*
- * Load the image into a virtual array. We have to do this because RLE
- * files start at the lower left while the JPEG standard has them starting
- * in the upper left. This is called the first time we want to get a row
- * of input. What we do is load the RLE data into the array and then call
- * the appropriate routine to read one row from the array. Before returning,
- * we set source->pub.get_pixel_rows so that subsequent calls go straight to
- * the appropriate row-reading routine.
- */
-
-METHODDEF(JDIMENSION)
-load_image (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-{
- rle_source_ptr source = (rle_source_ptr) sinfo;
- JDIMENSION row, col;
- JSAMPROW scanline, red_ptr, green_ptr, blue_ptr;
- rle_pixel **rle_row;
- rle_map *colormap;
- char channel;
-#ifdef PROGRESS_REPORT
- cd_progress_ptr progress = (cd_progress_ptr) cinfo->progress;
-#endif
-
- colormap = source->header.cmap;
- rle_row = source->rle_row;
-
- /* Read the RLE data into our virtual array.
- * We assume here that (a) rle_pixel is represented the same as JSAMPLE,
- * and (b) we are not on a machine where FAR pointers differ from regular.
- */
- RLE_CLR_BIT(source->header, RLE_ALPHA); /* don't read the alpha channel */
-
-#ifdef PROGRESS_REPORT
- if (progress != NULL) {
- progress->pub.pass_limit = cinfo->image_height;
- progress->pub.pass_counter = 0;
- (*progress->pub.progress_monitor) ((j_common_ptr) cinfo);
- }
-#endif
-
- switch (source->visual) {
-
- case GRAYSCALE:
- case PSEUDOCOLOR:
- for (row = 0; row < cinfo->image_height; row++) {
- rle_row = (rle_pixel **) (*cinfo->mem->access_virt_sarray)
- ((j_common_ptr) cinfo, source->image, row, (JDIMENSION) 1, TRUE);
- rle_getrow(&source->header, rle_row);
-#ifdef PROGRESS_REPORT
- if (progress != NULL) {
- progress->pub.pass_counter++;
- (*progress->pub.progress_monitor) ((j_common_ptr) cinfo);
- }
-#endif
- }
- break;
-
- case MAPPEDGRAY:
- case TRUECOLOR:
- for (row = 0; row < cinfo->image_height; row++) {
- scanline = * (*cinfo->mem->access_virt_sarray)
- ((j_common_ptr) cinfo, source->image, row, (JDIMENSION) 1, TRUE);
- rle_row = source->rle_row;
- rle_getrow(&source->header, rle_row);
-
- for (col = 0; col < cinfo->image_width; col++) {
- for (channel = 0; channel < source->header.ncolors; channel++) {
- *scanline++ = (JSAMPLE)
- (colormap[GETJSAMPLE(rle_row[channel][col]) + 256 * channel] >> 8);
- }
- }
-
-#ifdef PROGRESS_REPORT
- if (progress != NULL) {
- progress->pub.pass_counter++;
- (*progress->pub.progress_monitor) ((j_common_ptr) cinfo);
- }
-#endif
- }
- break;
-
- case DIRECTCOLOR:
- for (row = 0; row < cinfo->image_height; row++) {
- scanline = * (*cinfo->mem->access_virt_sarray)
- ((j_common_ptr) cinfo, source->image, row, (JDIMENSION) 1, TRUE);
- rle_getrow(&source->header, rle_row);
-
- red_ptr = rle_row[0];
- green_ptr = rle_row[1];
- blue_ptr = rle_row[2];
-
- for (col = cinfo->image_width; col > 0; col--) {
- *scanline++ = *red_ptr++;
- *scanline++ = *green_ptr++;
- *scanline++ = *blue_ptr++;
- }
-
-#ifdef PROGRESS_REPORT
- if (progress != NULL) {
- progress->pub.pass_counter++;
- (*progress->pub.progress_monitor) ((j_common_ptr) cinfo);
- }
-#endif
- }
- }
-
-#ifdef PROGRESS_REPORT
- if (progress != NULL)
- progress->completed_extra_passes++;
-#endif
-
- /* Set up to call proper row-extraction routine in future */
- if (source->visual == PSEUDOCOLOR) {
- source->pub.buffer = source->rle_row;
- source->pub.get_pixel_rows = get_pseudocolor_row;
- } else {
- source->pub.get_pixel_rows = get_rle_row;
- }
- source->row = cinfo->image_height;
-
- /* And fetch the topmost (bottommost) row */
- return (*source->pub.get_pixel_rows) (cinfo, sinfo);
-}
-
-
-/*
- * Finish up at the end of the file.
- */
-
-METHODDEF(void)
-finish_input_rle (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-{
- /* no work */
-}
-
-
-/*
- * The module selection routine for RLE format input.
- */
-
-GLOBAL(cjpeg_source_ptr)
-jinit_read_rle (j_compress_ptr cinfo)
-{
- rle_source_ptr source;
-
- /* Create module interface object */
- source = (rle_source_ptr)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
- SIZEOF(rle_source_struct));
- /* Fill in method ptrs */
- source->pub.start_input = start_input_rle;
- source->pub.finish_input = finish_input_rle;
- source->pub.get_pixel_rows = load_image;
-
- return (cjpeg_source_ptr) source;
-}
-
-#endif /* RLE_SUPPORTED */
+++ /dev/null
-/*
- * rdswitch.c
- *
- * Copyright (C) 1991-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains routines to process some of cjpeg's more complicated
- * command-line switches. Switches processed here are:
- * -qtables file Read quantization tables from text file
- * -scans file Read scan script from text file
- * -qslots N[,N,...] Set component quantization table selectors
- * -sample HxV[,HxV,...] Set component sampling factors
- */
-
-#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
-#include <ctype.h> /* to declare isdigit(), isspace() */
-
-
-LOCAL(int)
-text_getc (FILE * file)
-/* Read next char, skipping over any comments (# to end of line) */
-/* A comment/newline sequence is returned as a newline */
-{
- register int ch;
-
- ch = getc(file);
- if (ch == '#') {
- do {
- ch = getc(file);
- } while (ch != '\n' && ch != EOF);
- }
- return ch;
-}
-
-
-LOCAL(boolean)
-read_text_integer (FILE * file, long * result, int * termchar)
-/* Read an unsigned decimal integer from a file, store it in result */
-/* Reads one trailing character after the integer; returns it in termchar */
-{
- register int ch;
- register long val;
-
- /* Skip any leading whitespace, detect EOF */
- do {
- ch = text_getc(file);
- if (ch == EOF) {
- *termchar = ch;
- return FALSE;
- }
- } while (isspace(ch));
-
- if (! isdigit(ch)) {
- *termchar = ch;
- return FALSE;
- }
-
- val = ch - '0';
- while ((ch = text_getc(file)) != EOF) {
- if (! isdigit(ch))
- break;
- val *= 10;
- val += ch - '0';
- }
- *result = val;
- *termchar = ch;
- return TRUE;
-}
-
-
-GLOBAL(boolean)
-read_quant_tables (j_compress_ptr cinfo, char * filename,
- int scale_factor, boolean force_baseline)
-/* Read a set of quantization tables from the specified file.
- * The file is plain ASCII text: decimal numbers with whitespace between.
- * Comments preceded by '#' may be included in the file.
- * There may be one to NUM_QUANT_TBLS tables in the file, each of 64 values.
- * The tables are implicitly numbered 0,1,etc.
- * NOTE: does not affect the qslots mapping, which will default to selecting
- * table 0 for luminance (or primary) components, 1 for chrominance components.
- * You must use -qslots if you want a different component->table mapping.
- */
-{
- FILE * fp;
- int tblno, i, termchar;
- long val;
- unsigned int table[DCTSIZE2];
-
- if ((fp = fopen(filename, "r")) == NULL) {
- fprintf(stderr, "Can't open table file %s\n", filename);
- return FALSE;
- }
- tblno = 0;
-
- while (read_text_integer(fp, &val, &termchar)) { /* read 1st element of table */
- if (tblno >= NUM_QUANT_TBLS) {
- fprintf(stderr, "Too many tables in file %s\n", filename);
- fclose(fp);
- return FALSE;
- }
- table[0] = (unsigned int) val;
- for (i = 1; i < DCTSIZE2; i++) {
- if (! read_text_integer(fp, &val, &termchar)) {
- fprintf(stderr, "Invalid table data in file %s\n", filename);
- fclose(fp);
- return FALSE;
- }
- table[i] = (unsigned int) val;
- }
- jpeg_add_quant_table(cinfo, tblno, table, scale_factor, force_baseline);
- tblno++;
- }
-
- if (termchar != EOF) {
- fprintf(stderr, "Non-numeric data in file %s\n", filename);
- fclose(fp);
- return FALSE;
- }
-
- fclose(fp);
- return TRUE;
-}
-
-
-#ifdef C_MULTISCAN_FILES_SUPPORTED
-
-LOCAL(boolean)
-read_scan_integer (FILE * file, long * result, int * termchar)
-/* Variant of read_text_integer that always looks for a non-space termchar;
- * this simplifies parsing of punctuation in scan scripts.
- */
-{
- register int ch;
-
- if (! read_text_integer(file, result, termchar))
- return FALSE;
- ch = *termchar;
- while (ch != EOF && isspace(ch))
- ch = text_getc(file);
- if (isdigit(ch)) { /* oops, put it back */
- if (ungetc(ch, file) == EOF)
- return FALSE;
- ch = ' ';
- } else {
- /* Any separators other than ';' and ':' are ignored;
- * this allows user to insert commas, etc, if desired.
- */
- if (ch != EOF && ch != ';' && ch != ':')
- ch = ' ';
- }
- *termchar = ch;
- return TRUE;
-}
-
-
-GLOBAL(boolean)
-read_scan_script (j_compress_ptr cinfo, char * filename)
-/* Read a scan script from the specified text file.
- * Each entry in the file defines one scan to be emitted.
- * Entries are separated by semicolons ';'.
- * An entry contains one to four component indexes,
- * optionally followed by a colon ':' and four progressive-JPEG parameters.
- * The component indexes denote which component(s) are to be transmitted
- * in the current scan. The first component has index 0.
- * Sequential JPEG is used if the progressive-JPEG parameters are omitted.
- * The file is free format text: any whitespace may appear between numbers
- * and the ':' and ';' punctuation marks. Also, other punctuation (such
- * as commas or dashes) can be placed between numbers if desired.
- * Comments preceded by '#' may be included in the file.
- * Note: we do very little validity checking here;
- * jcmaster.c will validate the script parameters.
- */
-{
- FILE * fp;
- int scanno, ncomps, termchar;
- long val;
- jpeg_scan_info * scanptr;
-#define MAX_SCANS 100 /* quite arbitrary limit */
- jpeg_scan_info scans[MAX_SCANS];
-
- if ((fp = fopen(filename, "r")) == NULL) {
- fprintf(stderr, "Can't open scan definition file %s\n", filename);
- return FALSE;
- }
- scanptr = scans;
- scanno = 0;
-
- while (read_scan_integer(fp, &val, &termchar)) {
- if (scanno >= MAX_SCANS) {
- fprintf(stderr, "Too many scans defined in file %s\n", filename);
- fclose(fp);
- return FALSE;
- }
- scanptr->component_index[0] = (int) val;
- ncomps = 1;
- while (termchar == ' ') {
- if (ncomps >= MAX_COMPS_IN_SCAN) {
- fprintf(stderr, "Too many components in one scan in file %s\n",
- filename);
- fclose(fp);
- return FALSE;
- }
- if (! read_scan_integer(fp, &val, &termchar))
- goto bogus;
- scanptr->component_index[ncomps] = (int) val;
- ncomps++;
- }
- scanptr->comps_in_scan = ncomps;
- if (termchar == ':') {
- if (! read_scan_integer(fp, &val, &termchar) || termchar != ' ')
- goto bogus;
- scanptr->Ss = (int) val;
- if (! read_scan_integer(fp, &val, &termchar) || termchar != ' ')
- goto bogus;
- scanptr->Se = (int) val;
- if (! read_scan_integer(fp, &val, &termchar) || termchar != ' ')
- goto bogus;
- scanptr->Ah = (int) val;
- if (! read_scan_integer(fp, &val, &termchar))
- goto bogus;
- scanptr->Al = (int) val;
- } else {
- /* set non-progressive parameters */
- scanptr->Ss = 0;
- scanptr->Se = DCTSIZE2-1;
- scanptr->Ah = 0;
- scanptr->Al = 0;
- }
- if (termchar != ';' && termchar != EOF) {
-bogus:
- fprintf(stderr, "Invalid scan entry format in file %s\n", filename);
- fclose(fp);
- return FALSE;
- }
- scanptr++, scanno++;
- }
-
- if (termchar != EOF) {
- fprintf(stderr, "Non-numeric data in file %s\n", filename);
- fclose(fp);
- return FALSE;
- }
-
- if (scanno > 0) {
- /* Stash completed scan list in cinfo structure.
- * NOTE: for cjpeg's use, JPOOL_IMAGE is the right lifetime for this data,
- * but if you want to compress multiple images you'd want JPOOL_PERMANENT.
- */
- scanptr = (jpeg_scan_info *)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
- scanno * SIZEOF(jpeg_scan_info));
- MEMCOPY(scanptr, scans, scanno * SIZEOF(jpeg_scan_info));
- cinfo->scan_info = scanptr;
- cinfo->num_scans = scanno;
- }
-
- fclose(fp);
- return TRUE;
-}
-
-#endif /* C_MULTISCAN_FILES_SUPPORTED */
-
-
-GLOBAL(boolean)
-set_quant_slots (j_compress_ptr cinfo, char *arg)
-/* Process a quantization-table-selectors parameter string, of the form
- * N[,N,...]
- * If there are more components than parameters, the last value is replicated.
- */
-{
- int val = 0; /* default table # */
- int ci;
- char ch;
-
- for (ci = 0; ci < MAX_COMPONENTS; ci++) {
- if (*arg) {
- ch = ','; /* if not set by sscanf, will be ',' */
- if (sscanf(arg, "%d%c", &val, &ch) < 1)
- return FALSE;
- if (ch != ',') /* syntax check */
- return FALSE;
- if (val < 0 || val >= NUM_QUANT_TBLS) {
- fprintf(stderr, "JPEG quantization tables are numbered 0..%d\n",
- NUM_QUANT_TBLS-1);
- return FALSE;
- }
- cinfo->comp_info[ci].quant_tbl_no = val;
- while (*arg && *arg++ != ',') /* advance to next segment of arg string */
- ;
- } else {
- /* reached end of parameter, set remaining components to last table */
- cinfo->comp_info[ci].quant_tbl_no = val;
- }
- }
- return TRUE;
-}
-
-
-GLOBAL(boolean)
-set_sample_factors (j_compress_ptr cinfo, char *arg)
-/* Process a sample-factors parameter string, of the form
- * HxV[,HxV,...]
- * If there are more components than parameters, "1x1" is assumed for the rest.
- */
-{
- int ci, val1, val2;
- char ch1, ch2;
-
- for (ci = 0; ci < MAX_COMPONENTS; ci++) {
- if (*arg) {
- ch2 = ','; /* if not set by sscanf, will be ',' */
- if (sscanf(arg, "%d%c%d%c", &val1, &ch1, &val2, &ch2) < 3)
- return FALSE;
- if ((ch1 != 'x' && ch1 != 'X') || ch2 != ',') /* syntax check */
- return FALSE;
- if (val1 <= 0 || val1 > 4 || val2 <= 0 || val2 > 4) {
- fprintf(stderr, "JPEG sampling factors must be 1..4\n");
- return FALSE;
- }
- cinfo->comp_info[ci].h_samp_factor = val1;
- cinfo->comp_info[ci].v_samp_factor = val2;
- while (*arg && *arg++ != ',') /* advance to next segment of arg string */
- ;
- } else {
- /* reached end of parameter, set remaining components to 1x1 sampling */
- cinfo->comp_info[ci].h_samp_factor = 1;
- cinfo->comp_info[ci].v_samp_factor = 1;
- }
- }
- return TRUE;
-}
+++ /dev/null
-/*
- * rdtarga.c
- *
- * Copyright (C) 1991-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains routines to read input images in Targa format.
- *
- * These routines may need modification for non-Unix environments or
- * specialized applications. As they stand, they assume input from
- * an ordinary stdio stream. They further assume that reading begins
- * at the start of the file; start_input may need work if the
- * user interface has already read some data (e.g., to determine that
- * the file is indeed Targa format).
- *
- * Based on code contributed by Lee Daniel Crocker.
- */
-
-#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
-
-#ifdef TARGA_SUPPORTED
-
-
-/* Macros to deal with unsigned chars as efficiently as compiler allows */
-
-#ifdef HAVE_UNSIGNED_CHAR
-typedef unsigned char U_CHAR;
-#define UCH(x) ((int) (x))
-#else /* !HAVE_UNSIGNED_CHAR */
-#ifdef CHAR_IS_UNSIGNED
-typedef char U_CHAR;
-#define UCH(x) ((int) (x))
-#else
-typedef char U_CHAR;
-#define UCH(x) ((int) (x) & 0xFF)
-#endif
-#endif /* HAVE_UNSIGNED_CHAR */
-
-
-#define ReadOK(file,buffer,len) (JFREAD(file,buffer,len) == ((size_t) (len)))
-
-
-/* Private version of data source object */
-
-typedef struct _tga_source_struct * tga_source_ptr;
-
-typedef struct _tga_source_struct {
- struct cjpeg_source_struct pub; /* public fields */
-
- j_compress_ptr cinfo; /* back link saves passing separate parm */
-
- JSAMPARRAY colormap; /* Targa colormap (converted to my format) */
-
- jvirt_sarray_ptr whole_image; /* Needed if funny input row order */
- JDIMENSION current_row; /* Current logical row number to read */
-
- /* Pointer to routine to extract next Targa pixel from input file */
- JMETHOD(void, read_pixel, (tga_source_ptr sinfo));
-
- /* Result of read_pixel is delivered here: */
- U_CHAR tga_pixel[4];
-
- int pixel_size; /* Bytes per Targa pixel (1 to 4) */
-
- /* State info for reading RLE-coded pixels; both counts must be init to 0 */
- int block_count; /* # of pixels remaining in RLE block */
- int dup_pixel_count; /* # of times to duplicate previous pixel */
-
- /* This saves the correct pixel-row-expansion method for preload_image */
- JMETHOD(JDIMENSION, get_pixel_rows, (j_compress_ptr cinfo,
- cjpeg_source_ptr sinfo));
-} tga_source_struct;
-
-
-/* For expanding 5-bit pixel values to 8-bit with best rounding */
-
-static const UINT8 c5to8bits[32] = {
- 0, 8, 16, 25, 33, 41, 49, 58,
- 66, 74, 82, 90, 99, 107, 115, 123,
- 132, 140, 148, 156, 165, 173, 181, 189,
- 197, 206, 214, 222, 230, 239, 247, 255
-};
-
-
-
-LOCAL(int)
-read_byte (tga_source_ptr sinfo)
-/* Read next byte from Targa file */
-{
- register FILE *infile = sinfo->pub.input_file;
- register int c;
-
- if ((c = getc(infile)) == EOF)
- ERREXIT(sinfo->cinfo, JERR_INPUT_EOF);
- return c;
-}
-
-
-LOCAL(void)
-read_colormap (tga_source_ptr sinfo, int cmaplen, int mapentrysize)
-/* Read the colormap from a Targa file */
-{
- int i;
-
- /* Presently only handles 24-bit BGR format */
- if (mapentrysize != 24)
- ERREXIT(sinfo->cinfo, JERR_TGA_BADCMAP);
-
- for (i = 0; i < cmaplen; i++) {
- sinfo->colormap[2][i] = (JSAMPLE) read_byte(sinfo);
- sinfo->colormap[1][i] = (JSAMPLE) read_byte(sinfo);
- sinfo->colormap[0][i] = (JSAMPLE) read_byte(sinfo);
- }
-}
-
-
-/*
- * read_pixel methods: get a single pixel from Targa file into tga_pixel[]
- */
-
-METHODDEF(void)
-read_non_rle_pixel (tga_source_ptr sinfo)
-/* Read one Targa pixel from the input file; no RLE expansion */
-{
- register FILE *infile = sinfo->pub.input_file;
- register int i;
-
- for (i = 0; i < sinfo->pixel_size; i++) {
- sinfo->tga_pixel[i] = (U_CHAR) getc(infile);
- }
-}
-
-
-METHODDEF(void)
-read_rle_pixel (tga_source_ptr sinfo)
-/* Read one Targa pixel from the input file, expanding RLE data as needed */
-{
- register FILE *infile = sinfo->pub.input_file;
- register int i;
-
- /* Duplicate previously read pixel? */
- if (sinfo->dup_pixel_count > 0) {
- sinfo->dup_pixel_count--;
- return;
- }
-
- /* Time to read RLE block header? */
- if (--sinfo->block_count < 0) { /* decrement pixels remaining in block */
- i = read_byte(sinfo);
- if (i & 0x80) { /* Start of duplicate-pixel block? */
- sinfo->dup_pixel_count = i & 0x7F; /* number of dups after this one */
- sinfo->block_count = 0; /* then read new block header */
- } else {
- sinfo->block_count = i & 0x7F; /* number of pixels after this one */
- }
- }
-
- /* Read next pixel */
- for (i = 0; i < sinfo->pixel_size; i++) {
- sinfo->tga_pixel[i] = (U_CHAR) getc(infile);
- }
-}
-
-
-/*
- * Read one row of pixels.
- *
- * We provide several different versions depending on input file format.
- */
-
-
-METHODDEF(JDIMENSION)
-get_8bit_gray_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-/* This version is for reading 8-bit grayscale pixels */
-{
- tga_source_ptr source = (tga_source_ptr) sinfo;
- register JSAMPROW ptr;
- register JDIMENSION col;
-
- ptr = source->pub.buffer[0];
- for (col = cinfo->image_width; col > 0; col--) {
- (*source->read_pixel) (source); /* Load next pixel into tga_pixel */
- *ptr++ = (JSAMPLE) UCH(source->tga_pixel[0]);
- }
- return 1;
-}
-
-METHODDEF(JDIMENSION)
-get_8bit_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-/* This version is for reading 8-bit colormap indexes */
-{
- tga_source_ptr source = (tga_source_ptr) sinfo;
- register int t;
- register JSAMPROW ptr;
- register JDIMENSION col;
- register JSAMPARRAY colormap = source->colormap;
-
- ptr = source->pub.buffer[0];
- for (col = cinfo->image_width; col > 0; col--) {
- (*source->read_pixel) (source); /* Load next pixel into tga_pixel */
- t = UCH(source->tga_pixel[0]);
- *ptr++ = colormap[0][t];
- *ptr++ = colormap[1][t];
- *ptr++ = colormap[2][t];
- }
- return 1;
-}
-
-METHODDEF(JDIMENSION)
-get_16bit_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-/* This version is for reading 16-bit pixels */
-{
- tga_source_ptr source = (tga_source_ptr) sinfo;
- register int t;
- register JSAMPROW ptr;
- register JDIMENSION col;
-
- ptr = source->pub.buffer[0];
- for (col = cinfo->image_width; col > 0; col--) {
- (*source->read_pixel) (source); /* Load next pixel into tga_pixel */
- t = UCH(source->tga_pixel[0]);
- t += UCH(source->tga_pixel[1]) << 8;
- /* We expand 5 bit data to 8 bit sample width.
- * The format of the 16-bit (LSB first) input word is
- * xRRRRRGGGGGBBBBB
- */
- ptr[2] = (JSAMPLE) c5to8bits[t & 0x1F];
- t >>= 5;
- ptr[1] = (JSAMPLE) c5to8bits[t & 0x1F];
- t >>= 5;
- ptr[0] = (JSAMPLE) c5to8bits[t & 0x1F];
- ptr += 3;
- }
- return 1;
-}
-
-METHODDEF(JDIMENSION)
-get_24bit_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-/* This version is for reading 24-bit pixels */
-{
- tga_source_ptr source = (tga_source_ptr) sinfo;
- register JSAMPROW ptr;
- register JDIMENSION col;
-
- ptr = source->pub.buffer[0];
- for (col = cinfo->image_width; col > 0; col--) {
- (*source->read_pixel) (source); /* Load next pixel into tga_pixel */
- *ptr++ = (JSAMPLE) UCH(source->tga_pixel[2]); /* change BGR to RGB order */
- *ptr++ = (JSAMPLE) UCH(source->tga_pixel[1]);
- *ptr++ = (JSAMPLE) UCH(source->tga_pixel[0]);
- }
- return 1;
-}
-
-/*
- * Targa also defines a 32-bit pixel format with order B,G,R,A.
- * We presently ignore the attribute byte, so the code for reading
- * these pixels is identical to the 24-bit routine above.
- * This works because the actual pixel length is only known to read_pixel.
- */
-
-#define get_32bit_row get_24bit_row
-
-
-/*
- * This method is for re-reading the input data in standard top-down
- * row order. The entire image has already been read into whole_image
- * with proper conversion of pixel format, but it's in a funny row order.
- */
-
-METHODDEF(JDIMENSION)
-get_memory_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-{
- tga_source_ptr source = (tga_source_ptr) sinfo;
- JDIMENSION source_row;
-
- /* Compute row of source that maps to current_row of normal order */
- /* For now, assume image is bottom-up and not interlaced. */
- /* NEEDS WORK to support interlaced images! */
- source_row = cinfo->image_height - source->current_row - 1;
-
- /* Fetch that row from virtual array */
- source->pub.buffer = (*cinfo->mem->access_virt_sarray)
- ((j_common_ptr) cinfo, source->whole_image,
- source_row, (JDIMENSION) 1, FALSE);
-
- source->current_row++;
- return 1;
-}
-
-
-/*
- * This method loads the image into whole_image during the first call on
- * get_pixel_rows. The get_pixel_rows pointer is then adjusted to call
- * get_memory_row on subsequent calls.
- */
-
-METHODDEF(JDIMENSION)
-preload_image (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-{
- tga_source_ptr source = (tga_source_ptr) sinfo;
- JDIMENSION row;
- cd_progress_ptr progress = (cd_progress_ptr) cinfo->progress;
-
- /* Read the data into a virtual array in input-file row order. */
- for (row = 0; row < cinfo->image_height; row++) {
- if (progress != NULL) {
- progress->pub.pass_counter = (long) row;
- progress->pub.pass_limit = (long) cinfo->image_height;
- (*progress->pub.progress_monitor) ((j_common_ptr) cinfo);
- }
- source->pub.buffer = (*cinfo->mem->access_virt_sarray)
- ((j_common_ptr) cinfo, source->whole_image, row, (JDIMENSION) 1, TRUE);
- (*source->get_pixel_rows) (cinfo, sinfo);
- }
- if (progress != NULL)
- progress->completed_extra_passes++;
-
- /* Set up to read from the virtual array in unscrambled order */
- source->pub.get_pixel_rows = get_memory_row;
- source->current_row = 0;
- /* And read the first row */
- return get_memory_row(cinfo, sinfo);
-}
-
-
-/*
- * Read the file header; return image size and component count.
- */
-
-METHODDEF(void)
-start_input_tga (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-{
- tga_source_ptr source = (tga_source_ptr) sinfo;
- U_CHAR targaheader[18];
- int idlen, cmaptype, subtype, flags, interlace_type, components;
- unsigned int width, height, maplen;
- boolean is_bottom_up;
-
-#define GET_2B(offset) ((unsigned int) UCH(targaheader[offset]) + \
- (((unsigned int) UCH(targaheader[offset+1])) << 8))
-
- if (! ReadOK(source->pub.input_file, targaheader, 18))
- ERREXIT(cinfo, JERR_INPUT_EOF);
-
- /* Pretend "15-bit" pixels are 16-bit --- we ignore attribute bit anyway */
- if (targaheader[16] == 15)
- targaheader[16] = 16;
-
- idlen = UCH(targaheader[0]);
- cmaptype = UCH(targaheader[1]);
- subtype = UCH(targaheader[2]);
- maplen = GET_2B(5);
- width = GET_2B(12);
- height = GET_2B(14);
- source->pixel_size = UCH(targaheader[16]) >> 3;
- flags = UCH(targaheader[17]); /* Image Descriptor byte */
-
- is_bottom_up = ((flags & 0x20) == 0); /* bit 5 set => top-down */
- interlace_type = flags >> 6; /* bits 6/7 are interlace code */
-
- if (cmaptype > 1 || /* cmaptype must be 0 or 1 */
- source->pixel_size < 1 || source->pixel_size > 4 ||
- (UCH(targaheader[16]) & 7) != 0 || /* bits/pixel must be multiple of 8 */
- interlace_type != 0) /* currently don't allow interlaced image */
- ERREXIT(cinfo, JERR_TGA_BADPARMS);
-
- if (subtype > 8) {
- /* It's an RLE-coded file */
- source->read_pixel = read_rle_pixel;
- source->block_count = source->dup_pixel_count = 0;
- subtype -= 8;
- } else {
- /* Non-RLE file */
- source->read_pixel = read_non_rle_pixel;
- }
-
- /* Now should have subtype 1, 2, or 3 */
- components = 3; /* until proven different */
- cinfo->in_color_space = JCS_RGB;
-
- switch (subtype) {
- case 1: /* Colormapped image */
- if (source->pixel_size == 1 && cmaptype == 1)
- source->get_pixel_rows = get_8bit_row;
- else
- ERREXIT(cinfo, JERR_TGA_BADPARMS);
- TRACEMS2(cinfo, 1, JTRC_TGA_MAPPED, width, height);
- break;
- case 2: /* RGB image */
- switch (source->pixel_size) {
- case 2:
- source->get_pixel_rows = get_16bit_row;
- break;
- case 3:
- source->get_pixel_rows = get_24bit_row;
- break;
- case 4:
- source->get_pixel_rows = get_32bit_row;
- break;
- default:
- ERREXIT(cinfo, JERR_TGA_BADPARMS);
- break;
- }
- TRACEMS2(cinfo, 1, JTRC_TGA, width, height);
- break;
- case 3: /* Grayscale image */
- components = 1;
- cinfo->in_color_space = JCS_GRAYSCALE;
- if (source->pixel_size == 1)
- source->get_pixel_rows = get_8bit_gray_row;
- else
- ERREXIT(cinfo, JERR_TGA_BADPARMS);
- TRACEMS2(cinfo, 1, JTRC_TGA_GRAY, width, height);
- break;
- default:
- ERREXIT(cinfo, JERR_TGA_BADPARMS);
- break;
- }
-
- if (is_bottom_up) {
- /* Create a virtual array to buffer the upside-down image. */
- source->whole_image = (*cinfo->mem->request_virt_sarray)
- ((j_common_ptr) cinfo, JPOOL_IMAGE, FALSE,
- (JDIMENSION) width * components, (JDIMENSION) height, (JDIMENSION) 1);
- if (cinfo->progress != NULL) {
- cd_progress_ptr progress = (cd_progress_ptr) cinfo->progress;
- progress->total_extra_passes++; /* count file input as separate pass */
- }
- /* source->pub.buffer will point to the virtual array. */
- source->pub.buffer_height = 1; /* in case anyone looks at it */
- source->pub.get_pixel_rows = preload_image;
- } else {
- /* Don't need a virtual array, but do need a one-row input buffer. */
- source->whole_image = NULL;
- source->pub.buffer = (*cinfo->mem->alloc_sarray)
- ((j_common_ptr) cinfo, JPOOL_IMAGE,
- (JDIMENSION) width * components, (JDIMENSION) 1);
- source->pub.buffer_height = 1;
- source->pub.get_pixel_rows = source->get_pixel_rows;
- }
-
- while (idlen--) /* Throw away ID field */
- (void) read_byte(source);
-
- if (maplen > 0) {
- if (maplen > 256 || GET_2B(3) != 0)
- ERREXIT(cinfo, JERR_TGA_BADCMAP);
- /* Allocate space to store the colormap */
- source->colormap = (*cinfo->mem->alloc_sarray)
- ((j_common_ptr) cinfo, JPOOL_IMAGE, (JDIMENSION) maplen, (JDIMENSION) 3);
- /* and read it from the file */
- read_colormap(source, (int) maplen, UCH(targaheader[7]));
- } else {
- if (cmaptype) /* but you promised a cmap! */
- ERREXIT(cinfo, JERR_TGA_BADPARMS);
- source->colormap = NULL;
- }
-
- cinfo->input_components = components;
- cinfo->data_precision = 8;
- cinfo->image_width = width;
- cinfo->image_height = height;
-}
-
-
-/*
- * Finish up at the end of the file.
- */
-
-METHODDEF(void)
-finish_input_tga (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-{
- /* no work */
-}
-
-
-/*
- * The module selection routine for Targa format input.
- */
-
-GLOBAL(cjpeg_source_ptr)
-jinit_read_targa (j_compress_ptr cinfo)
-{
- tga_source_ptr source;
-
- /* Create module interface object */
- source = (tga_source_ptr)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
- SIZEOF(tga_source_struct));
- source->cinfo = cinfo; /* make back link for subroutines */
- /* Fill in method ptrs, except get_pixel_rows which start_input sets */
- source->pub.start_input = start_input_tga;
- source->pub.finish_input = finish_input_tga;
-
- return (cjpeg_source_ptr) source;
-}
-
-#endif /* TARGA_SUPPORTED */
+++ /dev/null
-/*
- * transupp.c
- *
- * Copyright (C) 1997, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains image transformation routines and other utility code
- * used by the jpegtran sample application. These are NOT part of the core
- * JPEG library. But we keep these routines separate from jpegtran.c to
- * ease the task of maintaining jpegtran-like programs that have other user
- * interfaces.
- */
-
-/* Although this file really shouldn't have access to the library internals,
- * it's helpful to let it call jround_up() and jcopy_block_row().
- */
-#define JPEG_INTERNALS
-
-#include "jinclude.h"
-#include "jpeglib.h"
-#include "transupp.h" /* My own external interface */
-
-
-#if TRANSFORMS_SUPPORTED
-
-/*
- * Lossless image transformation routines. These routines work on DCT
- * coefficient arrays and thus do not require any lossy decompression
- * or recompression of the image.
- * Thanks to Guido Vollbeding for the initial design and code of this feature.
- *
- * Horizontal flipping is done in-place, using a single top-to-bottom
- * pass through the virtual source array. It will thus be much the
- * fastest option for images larger than main memory.
- *
- * The other routines require a set of destination virtual arrays, so they
- * need twice as much memory as jpegtran normally does. The destination
- * arrays are always written in normal scan order (top to bottom) because
- * the virtual array manager expects this. The source arrays will be scanned
- * in the corresponding order, which means multiple passes through the source
- * arrays for most of the transforms. That could result in much thrashing
- * if the image is larger than main memory.
- *
- * Some notes about the operating environment of the individual transform
- * routines:
- * 1. Both the source and destination virtual arrays are allocated from the
- * source JPEG object, and therefore should be manipulated by calling the
- * source's memory manager.
- * 2. The destination's component count should be used. It may be smaller
- * than the source's when forcing to grayscale.
- * 3. Likewise the destination's sampling factors should be used. When
- * forcing to grayscale the destination's sampling factors will be all 1,
- * and we may as well take that as the effective iMCU size.
- * 4. When "trim" is in effect, the destination's dimensions will be the
- * trimmed values but the source's will be untrimmed.
- * 5. All the routines assume that the source and destination buffers are
- * padded out to a full iMCU boundary. This is true, although for the
- * source buffer it is an undocumented property of jdcoefct.c.
- * Notes 2,3,4 boil down to this: generally we should use the destination's
- * dimensions and ignore the source's.
- */
-
-
-LOCAL(void)
-do_flip_h (j_decompress_ptr srcinfo, j_compress_ptr dstinfo,
- jvirt_barray_ptr *src_coef_arrays)
-/* Horizontal flip; done in-place, so no separate dest array is required */
-{
- JDIMENSION MCU_cols, comp_width, blk_x, blk_y;
- int ci, k, offset_y;
- JBLOCKARRAY buffer;
- JCOEFPTR ptr1, ptr2;
- JCOEF temp1, temp2;
- jpeg_component_info *compptr;
-
- /* Horizontal mirroring of DCT blocks is accomplished by swapping
- * pairs of blocks in-place. Within a DCT block, we perform horizontal
- * mirroring by changing the signs of odd-numbered columns.
- * Partial iMCUs at the right edge are left untouched.
- */
- MCU_cols = dstinfo->image_width / (dstinfo->max_h_samp_factor * DCTSIZE);
-
- for (ci = 0; ci < dstinfo->num_components; ci++) {
- compptr = dstinfo->comp_info + ci;
- comp_width = MCU_cols * compptr->h_samp_factor;
- for (blk_y = 0; blk_y < compptr->height_in_blocks;
- blk_y += compptr->v_samp_factor) {
- buffer = (*srcinfo->mem->access_virt_barray)
- ((j_common_ptr) srcinfo, src_coef_arrays[ci], blk_y,
- (JDIMENSION) compptr->v_samp_factor, TRUE);
- for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) {
- for (blk_x = 0; blk_x * 2 < comp_width; blk_x++) {
- ptr1 = buffer[offset_y][blk_x];
- ptr2 = buffer[offset_y][comp_width - blk_x - 1];
- /* this unrolled loop doesn't need to know which row it's on... */
- for (k = 0; k < DCTSIZE2; k += 2) {
- temp1 = *ptr1; /* swap even column */
- temp2 = *ptr2;
- *ptr1++ = temp2;
- *ptr2++ = temp1;
- temp1 = *ptr1; /* swap odd column with sign change */
- temp2 = *ptr2;
- *ptr1++ = -temp2;
- *ptr2++ = -temp1;
- }
- }
- }
- }
- }
-}
-
-
-LOCAL(void)
-do_flip_v (j_decompress_ptr srcinfo, j_compress_ptr dstinfo,
- jvirt_barray_ptr *src_coef_arrays,
- jvirt_barray_ptr *dst_coef_arrays)
-/* Vertical flip */
-{
- JDIMENSION MCU_rows, comp_height, dst_blk_x, dst_blk_y;
- int ci, i, j, offset_y;
- JBLOCKARRAY src_buffer, dst_buffer;
- JBLOCKROW src_row_ptr, dst_row_ptr;
- JCOEFPTR src_ptr, dst_ptr;
- jpeg_component_info *compptr;
-
- /* We output into a separate array because we can't touch different
- * rows of the source virtual array simultaneously. Otherwise, this
- * is a pretty straightforward analog of horizontal flip.
- * Within a DCT block, vertical mirroring is done by changing the signs
- * of odd-numbered rows.
- * Partial iMCUs at the bottom edge are copied verbatim.
- */
- MCU_rows = dstinfo->image_height / (dstinfo->max_v_samp_factor * DCTSIZE);
-
- for (ci = 0; ci < dstinfo->num_components; ci++) {
- compptr = dstinfo->comp_info + ci;
- comp_height = MCU_rows * compptr->v_samp_factor;
- for (dst_blk_y = 0; dst_blk_y < compptr->height_in_blocks;
- dst_blk_y += compptr->v_samp_factor) {
- dst_buffer = (*srcinfo->mem->access_virt_barray)
- ((j_common_ptr) srcinfo, dst_coef_arrays[ci], dst_blk_y,
- (JDIMENSION) compptr->v_samp_factor, TRUE);
- if (dst_blk_y < comp_height) {
- /* Row is within the mirrorable area. */
- src_buffer = (*srcinfo->mem->access_virt_barray)
- ((j_common_ptr) srcinfo, src_coef_arrays[ci],
- comp_height - dst_blk_y - (JDIMENSION) compptr->v_samp_factor,
- (JDIMENSION) compptr->v_samp_factor, FALSE);
- } else {
- /* Bottom-edge blocks will be copied verbatim. */
- src_buffer = (*srcinfo->mem->access_virt_barray)
- ((j_common_ptr) srcinfo, src_coef_arrays[ci], dst_blk_y,
- (JDIMENSION) compptr->v_samp_factor, FALSE);
- }
- for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) {
- if (dst_blk_y < comp_height) {
- /* Row is within the mirrorable area. */
- dst_row_ptr = dst_buffer[offset_y];
- src_row_ptr = src_buffer[compptr->v_samp_factor - offset_y - 1];
- for (dst_blk_x = 0; dst_blk_x < compptr->width_in_blocks;
- dst_blk_x++) {
- dst_ptr = dst_row_ptr[dst_blk_x];
- src_ptr = src_row_ptr[dst_blk_x];
- for (i = 0; i < DCTSIZE; i += 2) {
- /* copy even row */
- for (j = 0; j < DCTSIZE; j++)
- *dst_ptr++ = *src_ptr++;
- /* copy odd row with sign change */
- for (j = 0; j < DCTSIZE; j++)
- *dst_ptr++ = - *src_ptr++;
- }
- }
- } else {
- /* Just copy row verbatim. */
- jcopy_block_row(src_buffer[offset_y], dst_buffer[offset_y],
- compptr->width_in_blocks);
- }
- }
- }
- }
-}
-
-
-LOCAL(void)
-do_transpose (j_decompress_ptr srcinfo, j_compress_ptr dstinfo,
- jvirt_barray_ptr *src_coef_arrays,
- jvirt_barray_ptr *dst_coef_arrays)
-/* Transpose source into destination */
-{
- JDIMENSION dst_blk_x, dst_blk_y;
- int ci, i, j, offset_x, offset_y;
- JBLOCKARRAY src_buffer, dst_buffer;
- JCOEFPTR src_ptr, dst_ptr;
- jpeg_component_info *compptr;
-
- /* Transposing pixels within a block just requires transposing the
- * DCT coefficients.
- * Partial iMCUs at the edges require no special treatment; we simply
- * process all the available DCT blocks for every component.
- */
- for (ci = 0; ci < dstinfo->num_components; ci++) {
- compptr = dstinfo->comp_info + ci;
- for (dst_blk_y = 0; dst_blk_y < compptr->height_in_blocks;
- dst_blk_y += compptr->v_samp_factor) {
- dst_buffer = (*srcinfo->mem->access_virt_barray)
- ((j_common_ptr) srcinfo, dst_coef_arrays[ci], dst_blk_y,
- (JDIMENSION) compptr->v_samp_factor, TRUE);
- for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) {
- for (dst_blk_x = 0; dst_blk_x < compptr->width_in_blocks;
- dst_blk_x += compptr->h_samp_factor) {
- src_buffer = (*srcinfo->mem->access_virt_barray)
- ((j_common_ptr) srcinfo, src_coef_arrays[ci], dst_blk_x,
- (JDIMENSION) compptr->h_samp_factor, FALSE);
- for (offset_x = 0; offset_x < compptr->h_samp_factor; offset_x++) {
- src_ptr = src_buffer[offset_x][dst_blk_y + offset_y];
- dst_ptr = dst_buffer[offset_y][dst_blk_x + offset_x];
- for (i = 0; i < DCTSIZE; i++)
- for (j = 0; j < DCTSIZE; j++)
- dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j];
- }
- }
- }
- }
- }
-}
-
-
-LOCAL(void)
-do_rot_90 (j_decompress_ptr srcinfo, j_compress_ptr dstinfo,
- jvirt_barray_ptr *src_coef_arrays,
- jvirt_barray_ptr *dst_coef_arrays)
-/* 90 degree rotation is equivalent to
- * 1. Transposing the image;
- * 2. Horizontal mirroring.
- * These two steps are merged into a single processing routine.
- */
-{
- JDIMENSION MCU_cols, comp_width, dst_blk_x, dst_blk_y;
- int ci, i, j, offset_x, offset_y;
- JBLOCKARRAY src_buffer, dst_buffer;
- JCOEFPTR src_ptr, dst_ptr;
- jpeg_component_info *compptr;
-
- /* Because of the horizontal mirror step, we can't process partial iMCUs
- * at the (output) right edge properly. They just get transposed and
- * not mirrored.
- */
- MCU_cols = dstinfo->image_width / (dstinfo->max_h_samp_factor * DCTSIZE);
-
- for (ci = 0; ci < dstinfo->num_components; ci++) {
- compptr = dstinfo->comp_info + ci;
- comp_width = MCU_cols * compptr->h_samp_factor;
- for (dst_blk_y = 0; dst_blk_y < compptr->height_in_blocks;
- dst_blk_y += compptr->v_samp_factor) {
- dst_buffer = (*srcinfo->mem->access_virt_barray)
- ((j_common_ptr) srcinfo, dst_coef_arrays[ci], dst_blk_y,
- (JDIMENSION) compptr->v_samp_factor, TRUE);
- for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) {
- for (dst_blk_x = 0; dst_blk_x < compptr->width_in_blocks;
- dst_blk_x += compptr->h_samp_factor) {
- src_buffer = (*srcinfo->mem->access_virt_barray)
- ((j_common_ptr) srcinfo, src_coef_arrays[ci], dst_blk_x,
- (JDIMENSION) compptr->h_samp_factor, FALSE);
- for (offset_x = 0; offset_x < compptr->h_samp_factor; offset_x++) {
- src_ptr = src_buffer[offset_x][dst_blk_y + offset_y];
- if (dst_blk_x < comp_width) {
- /* Block is within the mirrorable area. */
- dst_ptr = dst_buffer[offset_y]
- [comp_width - dst_blk_x - offset_x - 1];
- for (i = 0; i < DCTSIZE; i++) {
- for (j = 0; j < DCTSIZE; j++)
- dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j];
- i++;
- for (j = 0; j < DCTSIZE; j++)
- dst_ptr[j*DCTSIZE+i] = -src_ptr[i*DCTSIZE+j];
- }
- } else {
- /* Edge blocks are transposed but not mirrored. */
- dst_ptr = dst_buffer[offset_y][dst_blk_x + offset_x];
- for (i = 0; i < DCTSIZE; i++)
- for (j = 0; j < DCTSIZE; j++)
- dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j];
- }
- }
- }
- }
- }
- }
-}
-
-
-LOCAL(void)
-do_rot_270 (j_decompress_ptr srcinfo, j_compress_ptr dstinfo,
- jvirt_barray_ptr *src_coef_arrays,
- jvirt_barray_ptr *dst_coef_arrays)
-/* 270 degree rotation is equivalent to
- * 1. Horizontal mirroring;
- * 2. Transposing the image.
- * These two steps are merged into a single processing routine.
- */
-{
- JDIMENSION MCU_rows, comp_height, dst_blk_x, dst_blk_y;
- int ci, i, j, offset_x, offset_y;
- JBLOCKARRAY src_buffer, dst_buffer;
- JCOEFPTR src_ptr, dst_ptr;
- jpeg_component_info *compptr;
-
- /* Because of the horizontal mirror step, we can't process partial iMCUs
- * at the (output) bottom edge properly. They just get transposed and
- * not mirrored.
- */
- MCU_rows = dstinfo->image_height / (dstinfo->max_v_samp_factor * DCTSIZE);
-
- for (ci = 0; ci < dstinfo->num_components; ci++) {
- compptr = dstinfo->comp_info + ci;
- comp_height = MCU_rows * compptr->v_samp_factor;
- for (dst_blk_y = 0; dst_blk_y < compptr->height_in_blocks;
- dst_blk_y += compptr->v_samp_factor) {
- dst_buffer = (*srcinfo->mem->access_virt_barray)
- ((j_common_ptr) srcinfo, dst_coef_arrays[ci], dst_blk_y,
- (JDIMENSION) compptr->v_samp_factor, TRUE);
- for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) {
- for (dst_blk_x = 0; dst_blk_x < compptr->width_in_blocks;
- dst_blk_x += compptr->h_samp_factor) {
- src_buffer = (*srcinfo->mem->access_virt_barray)
- ((j_common_ptr) srcinfo, src_coef_arrays[ci], dst_blk_x,
- (JDIMENSION) compptr->h_samp_factor, FALSE);
- for (offset_x = 0; offset_x < compptr->h_samp_factor; offset_x++) {
- dst_ptr = dst_buffer[offset_y][dst_blk_x + offset_x];
- if (dst_blk_y < comp_height) {
- /* Block is within the mirrorable area. */
- src_ptr = src_buffer[offset_x]
- [comp_height - dst_blk_y - offset_y - 1];
- for (i = 0; i < DCTSIZE; i++) {
- for (j = 0; j < DCTSIZE; j++) {
- dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j];
- j++;
- dst_ptr[j*DCTSIZE+i] = -src_ptr[i*DCTSIZE+j];
- }
- }
- } else {
- /* Edge blocks are transposed but not mirrored. */
- src_ptr = src_buffer[offset_x][dst_blk_y + offset_y];
- for (i = 0; i < DCTSIZE; i++)
- for (j = 0; j < DCTSIZE; j++)
- dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j];
- }
- }
- }
- }
- }
- }
-}
-
-
-LOCAL(void)
-do_rot_180 (j_decompress_ptr srcinfo, j_compress_ptr dstinfo,
- jvirt_barray_ptr *src_coef_arrays,
- jvirt_barray_ptr *dst_coef_arrays)
-/* 180 degree rotation is equivalent to
- * 1. Vertical mirroring;
- * 2. Horizontal mirroring.
- * These two steps are merged into a single processing routine.
- */
-{
- JDIMENSION MCU_cols, MCU_rows, comp_width, comp_height, dst_blk_x, dst_blk_y;
- int ci, i, j, offset_y;
- JBLOCKARRAY src_buffer, dst_buffer;
- JBLOCKROW src_row_ptr, dst_row_ptr;
- JCOEFPTR src_ptr, dst_ptr;
- jpeg_component_info *compptr;
-
- MCU_cols = dstinfo->image_width / (dstinfo->max_h_samp_factor * DCTSIZE);
- MCU_rows = dstinfo->image_height / (dstinfo->max_v_samp_factor * DCTSIZE);
-
- for (ci = 0; ci < dstinfo->num_components; ci++) {
- compptr = dstinfo->comp_info + ci;
- comp_width = MCU_cols * compptr->h_samp_factor;
- comp_height = MCU_rows * compptr->v_samp_factor;
- for (dst_blk_y = 0; dst_blk_y < compptr->height_in_blocks;
- dst_blk_y += compptr->v_samp_factor) {
- dst_buffer = (*srcinfo->mem->access_virt_barray)
- ((j_common_ptr) srcinfo, dst_coef_arrays[ci], dst_blk_y,
- (JDIMENSION) compptr->v_samp_factor, TRUE);
- if (dst_blk_y < comp_height) {
- /* Row is within the vertically mirrorable area. */
- src_buffer = (*srcinfo->mem->access_virt_barray)
- ((j_common_ptr) srcinfo, src_coef_arrays[ci],
- comp_height - dst_blk_y - (JDIMENSION) compptr->v_samp_factor,
- (JDIMENSION) compptr->v_samp_factor, FALSE);
- } else {
- /* Bottom-edge rows are only mirrored horizontally. */
- src_buffer = (*srcinfo->mem->access_virt_barray)
- ((j_common_ptr) srcinfo, src_coef_arrays[ci], dst_blk_y,
- (JDIMENSION) compptr->v_samp_factor, FALSE);
- }
- for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) {
- if (dst_blk_y < comp_height) {
- /* Row is within the mirrorable area. */
- dst_row_ptr = dst_buffer[offset_y];
- src_row_ptr = src_buffer[compptr->v_samp_factor - offset_y - 1];
- /* Process the blocks that can be mirrored both ways. */
- for (dst_blk_x = 0; dst_blk_x < comp_width; dst_blk_x++) {
- dst_ptr = dst_row_ptr[dst_blk_x];
- src_ptr = src_row_ptr[comp_width - dst_blk_x - 1];
- for (i = 0; i < DCTSIZE; i += 2) {
- /* For even row, negate every odd column. */
- for (j = 0; j < DCTSIZE; j += 2) {
- *dst_ptr++ = *src_ptr++;
- *dst_ptr++ = - *src_ptr++;
- }
- /* For odd row, negate every even column. */
- for (j = 0; j < DCTSIZE; j += 2) {
- *dst_ptr++ = - *src_ptr++;
- *dst_ptr++ = *src_ptr++;
- }
- }
- }
- /* Any remaining right-edge blocks are only mirrored vertically. */
- for (; dst_blk_x < compptr->width_in_blocks; dst_blk_x++) {
- dst_ptr = dst_row_ptr[dst_blk_x];
- src_ptr = src_row_ptr[dst_blk_x];
- for (i = 0; i < DCTSIZE; i += 2) {
- for (j = 0; j < DCTSIZE; j++)
- *dst_ptr++ = *src_ptr++;
- for (j = 0; j < DCTSIZE; j++)
- *dst_ptr++ = - *src_ptr++;
- }
- }
- } else {
- /* Remaining rows are just mirrored horizontally. */
- dst_row_ptr = dst_buffer[offset_y];
- src_row_ptr = src_buffer[offset_y];
- /* Process the blocks that can be mirrored. */
- for (dst_blk_x = 0; dst_blk_x < comp_width; dst_blk_x++) {
- dst_ptr = dst_row_ptr[dst_blk_x];
- src_ptr = src_row_ptr[comp_width - dst_blk_x - 1];
- for (i = 0; i < DCTSIZE2; i += 2) {
- *dst_ptr++ = *src_ptr++;
- *dst_ptr++ = - *src_ptr++;
- }
- }
- /* Any remaining right-edge blocks are only copied. */
- for (; dst_blk_x < compptr->width_in_blocks; dst_blk_x++) {
- dst_ptr = dst_row_ptr[dst_blk_x];
- src_ptr = src_row_ptr[dst_blk_x];
- for (i = 0; i < DCTSIZE2; i++)
- *dst_ptr++ = *src_ptr++;
- }
- }
- }
- }
- }
-}
-
-
-LOCAL(void)
-do_transverse (j_decompress_ptr srcinfo, j_compress_ptr dstinfo,
- jvirt_barray_ptr *src_coef_arrays,
- jvirt_barray_ptr *dst_coef_arrays)
-/* Transverse transpose is equivalent to
- * 1. 180 degree rotation;
- * 2. Transposition;
- * or
- * 1. Horizontal mirroring;
- * 2. Transposition;
- * 3. Horizontal mirroring.
- * These steps are merged into a single processing routine.
- */
-{
- JDIMENSION MCU_cols, MCU_rows, comp_width, comp_height, dst_blk_x, dst_blk_y;
- int ci, i, j, offset_x, offset_y;
- JBLOCKARRAY src_buffer, dst_buffer;
- JCOEFPTR src_ptr, dst_ptr;
- jpeg_component_info *compptr;
-
- MCU_cols = dstinfo->image_width / (dstinfo->max_h_samp_factor * DCTSIZE);
- MCU_rows = dstinfo->image_height / (dstinfo->max_v_samp_factor * DCTSIZE);
-
- for (ci = 0; ci < dstinfo->num_components; ci++) {
- compptr = dstinfo->comp_info + ci;
- comp_width = MCU_cols * compptr->h_samp_factor;
- comp_height = MCU_rows * compptr->v_samp_factor;
- for (dst_blk_y = 0; dst_blk_y < compptr->height_in_blocks;
- dst_blk_y += compptr->v_samp_factor) {
- dst_buffer = (*srcinfo->mem->access_virt_barray)
- ((j_common_ptr) srcinfo, dst_coef_arrays[ci], dst_blk_y,
- (JDIMENSION) compptr->v_samp_factor, TRUE);
- for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) {
- for (dst_blk_x = 0; dst_blk_x < compptr->width_in_blocks;
- dst_blk_x += compptr->h_samp_factor) {
- src_buffer = (*srcinfo->mem->access_virt_barray)
- ((j_common_ptr) srcinfo, src_coef_arrays[ci], dst_blk_x,
- (JDIMENSION) compptr->h_samp_factor, FALSE);
- for (offset_x = 0; offset_x < compptr->h_samp_factor; offset_x++) {
- if (dst_blk_y < comp_height) {
- src_ptr = src_buffer[offset_x]
- [comp_height - dst_blk_y - offset_y - 1];
- if (dst_blk_x < comp_width) {
- /* Block is within the mirrorable area. */
- dst_ptr = dst_buffer[offset_y]
- [comp_width - dst_blk_x - offset_x - 1];
- for (i = 0; i < DCTSIZE; i++) {
- for (j = 0; j < DCTSIZE; j++) {
- dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j];
- j++;
- dst_ptr[j*DCTSIZE+i] = -src_ptr[i*DCTSIZE+j];
- }
- i++;
- for (j = 0; j < DCTSIZE; j++) {
- dst_ptr[j*DCTSIZE+i] = -src_ptr[i*DCTSIZE+j];
- j++;
- dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j];
- }
- }
- } else {
- /* Right-edge blocks are mirrored in y only */
- dst_ptr = dst_buffer[offset_y][dst_blk_x + offset_x];
- for (i = 0; i < DCTSIZE; i++) {
- for (j = 0; j < DCTSIZE; j++) {
- dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j];
- j++;
- dst_ptr[j*DCTSIZE+i] = -src_ptr[i*DCTSIZE+j];
- }
- }
- }
- } else {
- src_ptr = src_buffer[offset_x][dst_blk_y + offset_y];
- if (dst_blk_x < comp_width) {
- /* Bottom-edge blocks are mirrored in x only */
- dst_ptr = dst_buffer[offset_y]
- [comp_width - dst_blk_x - offset_x - 1];
- for (i = 0; i < DCTSIZE; i++) {
- for (j = 0; j < DCTSIZE; j++)
- dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j];
- i++;
- for (j = 0; j < DCTSIZE; j++)
- dst_ptr[j*DCTSIZE+i] = -src_ptr[i*DCTSIZE+j];
- }
- } else {
- /* At lower right corner, just transpose, no mirroring */
- dst_ptr = dst_buffer[offset_y][dst_blk_x + offset_x];
- for (i = 0; i < DCTSIZE; i++)
- for (j = 0; j < DCTSIZE; j++)
- dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j];
- }
- }
- }
- }
- }
- }
- }
-}
-
-
-/* Request any required workspace.
- *
- * We allocate the workspace virtual arrays from the source decompression
- * object, so that all the arrays (both the original data and the workspace)
- * will be taken into account while making memory management decisions.
- * Hence, this routine must be called after jpeg_read_header (which reads
- * the image dimensions) and before jpeg_read_coefficients (which realizes
- * the source's virtual arrays).
- */
-
-GLOBAL(void)
-jtransform_request_workspace (j_decompress_ptr srcinfo,
- jpeg_transform_info *info)
-{
- jvirt_barray_ptr *coef_arrays = NULL;
- jpeg_component_info *compptr;
- int ci;
-
- if (info->force_grayscale &&
- srcinfo->jpeg_color_space == JCS_YCbCr &&
- srcinfo->num_components == 3) {
- /* We'll only process the first component */
- info->num_components = 1;
- } else {
- /* Process all the components */
- info->num_components = srcinfo->num_components;
- }
-
- switch (info->transform) {
- case JXFORM_NONE:
- case JXFORM_FLIP_H:
- /* Don't need a workspace array */
- break;
- case JXFORM_FLIP_V:
- case JXFORM_ROT_180:
- /* Need workspace arrays having same dimensions as source image.
- * Note that we allocate arrays padded out to the next iMCU boundary,
- * so that transform routines need not worry about missing edge blocks.
- */
- coef_arrays = (jvirt_barray_ptr *)
- (*srcinfo->mem->alloc_small) ((j_common_ptr) srcinfo, JPOOL_IMAGE,
- SIZEOF(jvirt_barray_ptr) * info->num_components);
- for (ci = 0; ci < info->num_components; ci++) {
- compptr = srcinfo->comp_info + ci;
- coef_arrays[ci] = (*srcinfo->mem->request_virt_barray)
- ((j_common_ptr) srcinfo, JPOOL_IMAGE, FALSE,
- (JDIMENSION) jround_up((long) compptr->width_in_blocks,
- (long) compptr->h_samp_factor),
- (JDIMENSION) jround_up((long) compptr->height_in_blocks,
- (long) compptr->v_samp_factor),
- (JDIMENSION) compptr->v_samp_factor);
- }
- break;
- case JXFORM_TRANSPOSE:
- case JXFORM_TRANSVERSE:
- case JXFORM_ROT_90:
- case JXFORM_ROT_270:
- /* Need workspace arrays having transposed dimensions.
- * Note that we allocate arrays padded out to the next iMCU boundary,
- * so that transform routines need not worry about missing edge blocks.
- */
- coef_arrays = (jvirt_barray_ptr *)
- (*srcinfo->mem->alloc_small) ((j_common_ptr) srcinfo, JPOOL_IMAGE,
- SIZEOF(jvirt_barray_ptr) * info->num_components);
- for (ci = 0; ci < info->num_components; ci++) {
- compptr = srcinfo->comp_info + ci;
- coef_arrays[ci] = (*srcinfo->mem->request_virt_barray)
- ((j_common_ptr) srcinfo, JPOOL_IMAGE, FALSE,
- (JDIMENSION) jround_up((long) compptr->height_in_blocks,
- (long) compptr->v_samp_factor),
- (JDIMENSION) jround_up((long) compptr->width_in_blocks,
- (long) compptr->h_samp_factor),
- (JDIMENSION) compptr->h_samp_factor);
- }
- break;
- }
- info->workspace_coef_arrays = coef_arrays;
-}
-
-
-/* Transpose destination image parameters */
-
-LOCAL(void)
-transpose_critical_parameters (j_compress_ptr dstinfo)
-{
- int tblno, i, j, ci, itemp;
- jpeg_component_info *compptr;
- JQUANT_TBL *qtblptr;
- JDIMENSION dtemp;
- UINT16 qtemp;
-
- /* Transpose basic image dimensions */
- dtemp = dstinfo->image_width;
- dstinfo->image_width = dstinfo->image_height;
- dstinfo->image_height = dtemp;
-
- /* Transpose sampling factors */
- for (ci = 0; ci < dstinfo->num_components; ci++) {
- compptr = dstinfo->comp_info + ci;
- itemp = compptr->h_samp_factor;
- compptr->h_samp_factor = compptr->v_samp_factor;
- compptr->v_samp_factor = itemp;
- }
-
- /* Transpose quantization tables */
- for (tblno = 0; tblno < NUM_QUANT_TBLS; tblno++) {
- qtblptr = dstinfo->quant_tbl_ptrs[tblno];
- if (qtblptr != NULL) {
- for (i = 0; i < DCTSIZE; i++) {
- for (j = 0; j < i; j++) {
- qtemp = qtblptr->quantval[i*DCTSIZE+j];
- qtblptr->quantval[i*DCTSIZE+j] = qtblptr->quantval[j*DCTSIZE+i];
- qtblptr->quantval[j*DCTSIZE+i] = qtemp;
- }
- }
- }
- }
-}
-
-
-/* Trim off any partial iMCUs on the indicated destination edge */
-
-LOCAL(void)
-trim_right_edge (j_compress_ptr dstinfo)
-{
- int ci, max_h_samp_factor;
- JDIMENSION MCU_cols;
-
- /* We have to compute max_h_samp_factor ourselves,
- * because it hasn't been set yet in the destination
- * (and we don't want to use the source's value).
- */
- max_h_samp_factor = 1;
- for (ci = 0; ci < dstinfo->num_components; ci++) {
- int h_samp_factor = dstinfo->comp_info[ci].h_samp_factor;
- max_h_samp_factor = MAX(max_h_samp_factor, h_samp_factor);
- }
- MCU_cols = dstinfo->image_width / (max_h_samp_factor * DCTSIZE);
- if (MCU_cols > 0) /* can't trim to 0 pixels */
- dstinfo->image_width = MCU_cols * (max_h_samp_factor * DCTSIZE);
-}
-
-LOCAL(void)
-trim_bottom_edge (j_compress_ptr dstinfo)
-{
- int ci, max_v_samp_factor;
- JDIMENSION MCU_rows;
-
- /* We have to compute max_v_samp_factor ourselves,
- * because it hasn't been set yet in the destination
- * (and we don't want to use the source's value).
- */
- max_v_samp_factor = 1;
- for (ci = 0; ci < dstinfo->num_components; ci++) {
- int v_samp_factor = dstinfo->comp_info[ci].v_samp_factor;
- max_v_samp_factor = MAX(max_v_samp_factor, v_samp_factor);
- }
- MCU_rows = dstinfo->image_height / (max_v_samp_factor * DCTSIZE);
- if (MCU_rows > 0) /* can't trim to 0 pixels */
- dstinfo->image_height = MCU_rows * (max_v_samp_factor * DCTSIZE);
-}
-
-
-/* Adjust output image parameters as needed.
- *
- * This must be called after jpeg_copy_critical_parameters()
- * and before jpeg_write_coefficients().
- *
- * The return value is the set of virtual coefficient arrays to be written
- * (either the ones allocated by jtransform_request_workspace, or the
- * original source data arrays). The caller will need to pass this value
- * to jpeg_write_coefficients().
- */
-
-GLOBAL(jvirt_barray_ptr *)
-jtransform_adjust_parameters (j_decompress_ptr srcinfo,
- j_compress_ptr dstinfo,
- jvirt_barray_ptr *src_coef_arrays,
- jpeg_transform_info *info)
-{
- /* If force-to-grayscale is requested, adjust destination parameters */
- if (info->force_grayscale) {
- /* We use jpeg_set_colorspace to make sure subsidiary settings get fixed
- * properly. Among other things, the target h_samp_factor & v_samp_factor
- * will get set to 1, which typically won't match the source.
- * In fact we do this even if the source is already grayscale; that
- * provides an easy way of coercing a grayscale JPEG with funny sampling
- * factors to the customary 1,1. (Some decoders fail on other factors.)
- */
- if ((dstinfo->jpeg_color_space == JCS_YCbCr &&
- dstinfo->num_components == 3) ||
- (dstinfo->jpeg_color_space == JCS_GRAYSCALE &&
- dstinfo->num_components == 1)) {
- /* We have to preserve the source's quantization table number. */
- int sv_quant_tbl_no = dstinfo->comp_info[0].quant_tbl_no;
- jpeg_set_colorspace(dstinfo, JCS_GRAYSCALE);
- dstinfo->comp_info[0].quant_tbl_no = sv_quant_tbl_no;
- } else {
- /* Sorry, can't do it */
- ERREXIT(dstinfo, JERR_CONVERSION_NOTIMPL);
- }
- }
-
- /* Correct the destination's image dimensions etc if necessary */
- switch (info->transform) {
- case JXFORM_NONE:
- /* Nothing to do */
- break;
- case JXFORM_FLIP_H:
- if (info->trim)
- trim_right_edge(dstinfo);
- break;
- case JXFORM_FLIP_V:
- if (info->trim)
- trim_bottom_edge(dstinfo);
- break;
- case JXFORM_TRANSPOSE:
- transpose_critical_parameters(dstinfo);
- /* transpose does NOT have to trim anything */
- break;
- case JXFORM_TRANSVERSE:
- transpose_critical_parameters(dstinfo);
- if (info->trim) {
- trim_right_edge(dstinfo);
- trim_bottom_edge(dstinfo);
- }
- break;
- case JXFORM_ROT_90:
- transpose_critical_parameters(dstinfo);
- if (info->trim)
- trim_right_edge(dstinfo);
- break;
- case JXFORM_ROT_180:
- if (info->trim) {
- trim_right_edge(dstinfo);
- trim_bottom_edge(dstinfo);
- }
- break;
- case JXFORM_ROT_270:
- transpose_critical_parameters(dstinfo);
- if (info->trim)
- trim_bottom_edge(dstinfo);
- break;
- }
-
- /* Return the appropriate output data set */
- if (info->workspace_coef_arrays != NULL)
- return info->workspace_coef_arrays;
- return src_coef_arrays;
-}
-
-
-/* Execute the actual transformation, if any.
- *
- * This must be called *after* jpeg_write_coefficients, because it depends
- * on jpeg_write_coefficients to have computed subsidiary values such as
- * the per-component width and height fields in the destination object.
- *
- * Note that some transformations will modify the source data arrays!
- */
-
-GLOBAL(void)
-jtransform_execute_transformation (j_decompress_ptr srcinfo,
- j_compress_ptr dstinfo,
- jvirt_barray_ptr *src_coef_arrays,
- jpeg_transform_info *info)
-{
- jvirt_barray_ptr *dst_coef_arrays = info->workspace_coef_arrays;
-
- switch (info->transform) {
- case JXFORM_NONE:
- break;
- case JXFORM_FLIP_H:
- do_flip_h(srcinfo, dstinfo, src_coef_arrays);
- break;
- case JXFORM_FLIP_V:
- do_flip_v(srcinfo, dstinfo, src_coef_arrays, dst_coef_arrays);
- break;
- case JXFORM_TRANSPOSE:
- do_transpose(srcinfo, dstinfo, src_coef_arrays, dst_coef_arrays);
- break;
- case JXFORM_TRANSVERSE:
- do_transverse(srcinfo, dstinfo, src_coef_arrays, dst_coef_arrays);
- break;
- case JXFORM_ROT_90:
- do_rot_90(srcinfo, dstinfo, src_coef_arrays, dst_coef_arrays);
- break;
- case JXFORM_ROT_180:
- do_rot_180(srcinfo, dstinfo, src_coef_arrays, dst_coef_arrays);
- break;
- case JXFORM_ROT_270:
- do_rot_270(srcinfo, dstinfo, src_coef_arrays, dst_coef_arrays);
- break;
- }
-}
-
-#endif /* TRANSFORMS_SUPPORTED */
-
-
-/* Setup decompression object to save desired markers in memory.
- * This must be called before jpeg_read_header() to have the desired effect.
- */
-
-GLOBAL(void)
-jcopy_markers_setup (j_decompress_ptr srcinfo, JCOPY_OPTION option)
-{
-#ifdef SAVE_MARKERS_SUPPORTED
- int m;
-
- /* Save comments except under NONE option */
- if (option != JCOPYOPT_NONE) {
- jpeg_save_markers(srcinfo, JPEG_COM, 0xFFFF);
- }
- /* Save all types of APPn markers iff ALL option */
- if (option == JCOPYOPT_ALL) {
- for (m = 0; m < 16; m++)
- jpeg_save_markers(srcinfo, JPEG_APP0 + m, 0xFFFF);
- }
-#endif /* SAVE_MARKERS_SUPPORTED */
-}
-
-/* Copy markers saved in the given source object to the destination object.
- * This should be called just after jpeg_start_compress() or
- * jpeg_write_coefficients().
- * Note that those routines will have written the SOI, and also the
- * JFIF APP0 or Adobe APP14 markers if selected.
- */
-
-GLOBAL(void)
-jcopy_markers_execute (j_decompress_ptr srcinfo, j_compress_ptr dstinfo,
- JCOPY_OPTION option)
-{
- jpeg_saved_marker_ptr marker;
-
- /* In the current implementation, we don't actually need to examine the
- * option flag here; we just copy everything that got saved.
- * But to avoid confusion, we do not output JFIF and Adobe APP14 markers
- * if the encoder library already wrote one.
- */
- for (marker = srcinfo->marker_list; marker != NULL; marker = marker->next) {
- if (dstinfo->write_JFIF_header &&
- marker->marker == JPEG_APP0 &&
- marker->data_length >= 5 &&
- GETJOCTET(marker->data[0]) == 0x4A &&
- GETJOCTET(marker->data[1]) == 0x46 &&
- GETJOCTET(marker->data[2]) == 0x49 &&
- GETJOCTET(marker->data[3]) == 0x46 &&
- GETJOCTET(marker->data[4]) == 0)
- continue; /* reject duplicate JFIF */
- if (dstinfo->write_Adobe_marker &&
- marker->marker == JPEG_APP0+14 &&
- marker->data_length >= 5 &&
- GETJOCTET(marker->data[0]) == 0x41 &&
- GETJOCTET(marker->data[1]) == 0x64 &&
- GETJOCTET(marker->data[2]) == 0x6F &&
- GETJOCTET(marker->data[3]) == 0x62 &&
- GETJOCTET(marker->data[4]) == 0x65)
- continue; /* reject duplicate Adobe */
-#ifdef NEED_FAR_POINTERS
- /* We could use jpeg_write_marker if the data weren't FAR... */
- {
- unsigned int i;
- jpeg_write_m_header(dstinfo, marker->marker, marker->data_length);
- for (i = 0; i < marker->data_length; i++)
- jpeg_write_m_byte(dstinfo, marker->data[i]);
- }
-#else
- jpeg_write_marker(dstinfo, marker->marker,
- marker->data, marker->data_length);
-#endif
- }
-}
+++ /dev/null
-/*
- * transupp.h
- *
- * Copyright (C) 1997, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains declarations for image transformation routines and
- * other utility code used by the jpegtran sample application. These are
- * NOT part of the core JPEG library. But we keep these routines separate
- * from jpegtran.c to ease the task of maintaining jpegtran-like programs
- * that have other user interfaces.
- *
- * NOTE: all the routines declared here have very specific requirements
- * about when they are to be executed during the reading and writing of the
- * source and destination files. See the comments in transupp.c, or see
- * jpegtran.c for an example of correct usage.
- */
-
-/* If you happen not to want the image transform support, disable it here */
-#ifndef TRANSFORMS_SUPPORTED
-#define TRANSFORMS_SUPPORTED 1 /* 0 disables transform code */
-#endif
-
-/* Short forms of external names for systems with brain-damaged linkers. */
-
-#ifdef NEED_SHORT_EXTERNAL_NAMES
-#define jtransform_request_workspace jTrRequest
-#define jtransform_adjust_parameters jTrAdjust
-#define jtransform_execute_transformation jTrExec
-#define jcopy_markers_setup jCMrkSetup
-#define jcopy_markers_execute jCMrkExec
-#endif /* NEED_SHORT_EXTERNAL_NAMES */
-
-
-/*
- * Codes for supported types of image transformations.
- */
-
-typedef enum {
- JXFORM_NONE, /* no transformation */
- JXFORM_FLIP_H, /* horizontal flip */
- JXFORM_FLIP_V, /* vertical flip */
- JXFORM_TRANSPOSE, /* transpose across UL-to-LR axis */
- JXFORM_TRANSVERSE, /* transpose across UR-to-LL axis */
- JXFORM_ROT_90, /* 90-degree clockwise rotation */
- JXFORM_ROT_180, /* 180-degree rotation */
- JXFORM_ROT_270 /* 270-degree clockwise (or 90 ccw) */
-} JXFORM_CODE;
-
-/*
- * Although rotating and flipping data expressed as DCT coefficients is not
- * hard, there is an asymmetry in the JPEG format specification for images
- * whose dimensions aren't multiples of the iMCU size. The right and bottom
- * image edges are padded out to the next iMCU boundary with junk data; but
- * no padding is possible at the top and left edges. If we were to flip
- * the whole image including the pad data, then pad garbage would become
- * visible at the top and/or left, and real pixels would disappear into the
- * pad margins --- perhaps permanently, since encoders & decoders may not
- * bother to preserve DCT blocks that appear to be completely outside the
- * nominal image area. So, we have to exclude any partial iMCUs from the
- * basic transformation.
- *
- * Transpose is the only transformation that can handle partial iMCUs at the
- * right and bottom edges completely cleanly. flip_h can flip partial iMCUs
- * at the bottom, but leaves any partial iMCUs at the right edge untouched.
- * Similarly flip_v leaves any partial iMCUs at the bottom edge untouched.
- * The other transforms are defined as combinations of these basic transforms
- * and process edge blocks in a way that preserves the equivalence.
- *
- * The "trim" option causes untransformable partial iMCUs to be dropped;
- * this is not strictly lossless, but it usually gives the best-looking
- * result for odd-size images. Note that when this option is active,
- * the expected mathematical equivalences between the transforms may not hold.
- * (For example, -rot 270 -trim trims only the bottom edge, but -rot 90 -trim
- * followed by -rot 180 -trim trims both edges.)
- *
- * We also offer a "force to grayscale" option, which simply discards the
- * chrominance channels of a YCbCr image. This is lossless in the sense that
- * the luminance channel is preserved exactly. It's not the same kind of
- * thing as the rotate/flip transformations, but it's convenient to handle it
- * as part of this package, mainly because the transformation routines have to
- * be aware of the option to know how many components to work on.
- */
-
-typedef struct {
- /* Options: set by caller */
- JXFORM_CODE transform; /* image transform operator */
- boolean trim; /* if TRUE, trim partial MCUs as needed */
- boolean force_grayscale; /* if TRUE, convert color image to grayscale */
-
- /* Internal workspace: caller should not touch these */
- int num_components; /* # of components in workspace */
- jvirt_barray_ptr * workspace_coef_arrays; /* workspace for transformations */
-} jpeg_transform_info;
-
-
-#if TRANSFORMS_SUPPORTED
-
-/* Request any required workspace */
-EXTERN(void) jtransform_request_workspace
- JPP((j_decompress_ptr srcinfo, jpeg_transform_info *info));
-/* Adjust output image parameters */
-EXTERN(jvirt_barray_ptr *) jtransform_adjust_parameters
- JPP((j_decompress_ptr srcinfo, j_compress_ptr dstinfo,
- jvirt_barray_ptr *src_coef_arrays,
- jpeg_transform_info *info));
-/* Execute the actual transformation, if any */
-EXTERN(void) jtransform_execute_transformation
- JPP((j_decompress_ptr srcinfo, j_compress_ptr dstinfo,
- jvirt_barray_ptr *src_coef_arrays,
- jpeg_transform_info *info));
-
-#endif /* TRANSFORMS_SUPPORTED */
-
-
-/*
- * Support for copying optional markers from source to destination file.
- */
-
-typedef enum {
- JCOPYOPT_NONE, /* copy no optional markers */
- JCOPYOPT_COMMENTS, /* copy only comment (COM) markers */
- JCOPYOPT_ALL /* copy all optional markers */
-} JCOPY_OPTION;
-
-#define JCOPYOPT_DEFAULT JCOPYOPT_COMMENTS /* recommended default */
-
-/* Setup decompression object to save desired markers in memory */
-EXTERN(void) jcopy_markers_setup
- JPP((j_decompress_ptr srcinfo, JCOPY_OPTION option));
-/* Copy markers saved in the given source object to the destination object */
-EXTERN(void) jcopy_markers_execute
- JPP((j_decompress_ptr srcinfo, j_compress_ptr dstinfo,
- JCOPY_OPTION option));
+++ /dev/null
-/*
- * wrbmp.c
- *
- * Copyright (C) 1994-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains routines to write output images in Microsoft "BMP"
- * format (MS Windows 3.x and OS/2 1.x flavors).
- * Either 8-bit colormapped or 24-bit full-color format can be written.
- * No compression is supported.
- *
- * These routines may need modification for non-Unix environments or
- * specialized applications. As they stand, they assume output to
- * an ordinary stdio stream.
- *
- * This code contributed by James Arthur Boucher.
- */
-
-#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
-
-#ifdef BMP_SUPPORTED
-
-
-/*
- * To support 12-bit JPEG data, we'd have to scale output down to 8 bits.
- * This is not yet implemented.
- */
-
-#if BITS_IN_JSAMPLE != 8
- Sorry, this code only copes with 8-bit JSAMPLEs. /* deliberate syntax err */
-#endif
-
-/*
- * Since BMP stores scanlines bottom-to-top, we have to invert the image
- * from JPEG's top-to-bottom order. To do this, we save the outgoing data
- * in a virtual array during put_pixel_row calls, then actually emit the
- * BMP file during finish_output. The virtual array contains one JSAMPLE per
- * pixel if the output is grayscale or colormapped, three if it is full color.
- */
-
-/* Private version of data destination object */
-
-typedef struct {
- struct djpeg_dest_struct pub; /* public fields */
-
- boolean is_os2; /* saves the OS2 format request flag */
-
- jvirt_sarray_ptr whole_image; /* needed to reverse row order */
- JDIMENSION data_width; /* JSAMPLEs per row */
- JDIMENSION row_width; /* physical width of one row in the BMP file */
- int pad_bytes; /* number of padding bytes needed per row */
- JDIMENSION cur_output_row; /* next row# to write to virtual array */
-} bmp_dest_struct;
-
-typedef bmp_dest_struct * bmp_dest_ptr;
-
-
-/* Forward declarations */
-LOCAL(void) write_colormap
- JPP((j_decompress_ptr cinfo, bmp_dest_ptr dest,
- int map_colors, int map_entry_size));
-
-
-/*
- * Write some pixel data.
- * In this module rows_supplied will always be 1.
- */
-
-METHODDEF(void)
-put_pixel_rows (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
- JDIMENSION rows_supplied)
-/* This version is for writing 24-bit pixels */
-{
- bmp_dest_ptr dest = (bmp_dest_ptr) dinfo;
- JSAMPARRAY image_ptr;
- register JSAMPROW inptr, outptr;
- register JDIMENSION col;
- int pad;
-
- /* Access next row in virtual array */
- image_ptr = (*cinfo->mem->access_virt_sarray)
- ((j_common_ptr) cinfo, dest->whole_image,
- dest->cur_output_row, (JDIMENSION) 1, TRUE);
- dest->cur_output_row++;
-
- /* Transfer data. Note destination values must be in BGR order
- * (even though Microsoft's own documents say the opposite).
- */
- inptr = dest->pub.buffer[0];
- outptr = image_ptr[0];
- for (col = cinfo->output_width; col > 0; col--) {
- outptr[2] = *inptr++; /* can omit GETJSAMPLE() safely */
- outptr[1] = *inptr++;
- outptr[0] = *inptr++;
- outptr += 3;
- }
-
- /* Zero out the pad bytes. */
- pad = dest->pad_bytes;
- while (--pad >= 0)
- *outptr++ = 0;
-}
-
-METHODDEF(void)
-put_gray_rows (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
- JDIMENSION rows_supplied)
-/* This version is for grayscale OR quantized color output */
-{
- bmp_dest_ptr dest = (bmp_dest_ptr) dinfo;
- JSAMPARRAY image_ptr;
- register JSAMPROW inptr, outptr;
- register JDIMENSION col;
- int pad;
-
- /* Access next row in virtual array */
- image_ptr = (*cinfo->mem->access_virt_sarray)
- ((j_common_ptr) cinfo, dest->whole_image,
- dest->cur_output_row, (JDIMENSION) 1, TRUE);
- dest->cur_output_row++;
-
- /* Transfer data. */
- inptr = dest->pub.buffer[0];
- outptr = image_ptr[0];
- for (col = cinfo->output_width; col > 0; col--) {
- *outptr++ = *inptr++; /* can omit GETJSAMPLE() safely */
- }
-
- /* Zero out the pad bytes. */
- pad = dest->pad_bytes;
- while (--pad >= 0)
- *outptr++ = 0;
-}
-
-
-/*
- * Startup: normally writes the file header.
- * In this module we may as well postpone everything until finish_output.
- */
-
-METHODDEF(void)
-start_output_bmp (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo)
-{
- /* no work here */
-}
-
-
-/*
- * Finish up at the end of the file.
- *
- * Here is where we really output the BMP file.
- *
- * First, routines to write the Windows and OS/2 variants of the file header.
- */
-
-LOCAL(void)
-write_bmp_header (j_decompress_ptr cinfo, bmp_dest_ptr dest)
-/* Write a Windows-style BMP file header, including colormap if needed */
-{
- char bmpfileheader[14];
- char bmpinfoheader[40];
-#define PUT_2B(array,offset,value) \
- (array[offset] = (char) ((value) & 0xFF), \
- array[offset+1] = (char) (((value) >> 8) & 0xFF))
-#define PUT_4B(array,offset,value) \
- (array[offset] = (char) ((value) & 0xFF), \
- array[offset+1] = (char) (((value) >> 8) & 0xFF), \
- array[offset+2] = (char) (((value) >> 16) & 0xFF), \
- array[offset+3] = (char) (((value) >> 24) & 0xFF))
- INT32 headersize, bfSize;
- int bits_per_pixel, cmap_entries;
-
- /* Compute colormap size and total file size */
- if (cinfo->out_color_space == JCS_RGB) {
- if (cinfo->quantize_colors) {
- /* Colormapped RGB */
- bits_per_pixel = 8;
- cmap_entries = 256;
- } else {
- /* Unquantized, full color RGB */
- bits_per_pixel = 24;
- cmap_entries = 0;
- }
- } else {
- /* Grayscale output. We need to fake a 256-entry colormap. */
- bits_per_pixel = 8;
- cmap_entries = 256;
- }
- /* File size */
- headersize = 14 + 40 + cmap_entries * 4; /* Header and colormap */
- bfSize = headersize + (INT32) dest->row_width * (INT32) cinfo->output_height;
-
- /* Set unused fields of header to 0 */
- MEMZERO(bmpfileheader, SIZEOF(bmpfileheader));
- MEMZERO(bmpinfoheader, SIZEOF(bmpinfoheader));
-
- /* Fill the file header */
- bmpfileheader[0] = 0x42; /* first 2 bytes are ASCII 'B', 'M' */
- bmpfileheader[1] = 0x4D;
- PUT_4B(bmpfileheader, 2, bfSize); /* bfSize */
- /* we leave bfReserved1 & bfReserved2 = 0 */
- PUT_4B(bmpfileheader, 10, headersize); /* bfOffBits */
-
- /* Fill the info header (Microsoft calls this a BITMAPINFOHEADER) */
- PUT_2B(bmpinfoheader, 0, 40); /* biSize */
- PUT_4B(bmpinfoheader, 4, cinfo->output_width); /* biWidth */
- PUT_4B(bmpinfoheader, 8, cinfo->output_height); /* biHeight */
- PUT_2B(bmpinfoheader, 12, 1); /* biPlanes - must be 1 */
- PUT_2B(bmpinfoheader, 14, bits_per_pixel); /* biBitCount */
- /* we leave biCompression = 0, for none */
- /* we leave biSizeImage = 0; this is correct for uncompressed data */
- if (cinfo->density_unit == 2) { /* if have density in dots/cm, then */
- PUT_4B(bmpinfoheader, 24, (INT32) (cinfo->X_density*100)); /* XPels/M */
- PUT_4B(bmpinfoheader, 28, (INT32) (cinfo->Y_density*100)); /* XPels/M */
- }
- PUT_2B(bmpinfoheader, 32, cmap_entries); /* biClrUsed */
- /* we leave biClrImportant = 0 */
-
- if (JFWRITE(dest->pub.output_file, bmpfileheader, 14) != (size_t) 14)
- ERREXIT(cinfo, JERR_FILE_WRITE);
- if (JFWRITE(dest->pub.output_file, bmpinfoheader, 40) != (size_t) 40)
- ERREXIT(cinfo, JERR_FILE_WRITE);
-
- if (cmap_entries > 0)
- write_colormap(cinfo, dest, cmap_entries, 4);
-}
-
-
-LOCAL(void)
-write_os2_header (j_decompress_ptr cinfo, bmp_dest_ptr dest)
-/* Write an OS2-style BMP file header, including colormap if needed */
-{
- char bmpfileheader[14];
- char bmpcoreheader[12];
- INT32 headersize, bfSize;
- int bits_per_pixel, cmap_entries;
-
- /* Compute colormap size and total file size */
- if (cinfo->out_color_space == JCS_RGB) {
- if (cinfo->quantize_colors) {
- /* Colormapped RGB */
- bits_per_pixel = 8;
- cmap_entries = 256;
- } else {
- /* Unquantized, full color RGB */
- bits_per_pixel = 24;
- cmap_entries = 0;
- }
- } else {
- /* Grayscale output. We need to fake a 256-entry colormap. */
- bits_per_pixel = 8;
- cmap_entries = 256;
- }
- /* File size */
- headersize = 14 + 12 + cmap_entries * 3; /* Header and colormap */
- bfSize = headersize + (INT32) dest->row_width * (INT32) cinfo->output_height;
-
- /* Set unused fields of header to 0 */
- MEMZERO(bmpfileheader, SIZEOF(bmpfileheader));
- MEMZERO(bmpcoreheader, SIZEOF(bmpcoreheader));
-
- /* Fill the file header */
- bmpfileheader[0] = 0x42; /* first 2 bytes are ASCII 'B', 'M' */
- bmpfileheader[1] = 0x4D;
- PUT_4B(bmpfileheader, 2, bfSize); /* bfSize */
- /* we leave bfReserved1 & bfReserved2 = 0 */
- PUT_4B(bmpfileheader, 10, headersize); /* bfOffBits */
-
- /* Fill the info header (Microsoft calls this a BITMAPCOREHEADER) */
- PUT_2B(bmpcoreheader, 0, 12); /* bcSize */
- PUT_2B(bmpcoreheader, 4, cinfo->output_width); /* bcWidth */
- PUT_2B(bmpcoreheader, 6, cinfo->output_height); /* bcHeight */
- PUT_2B(bmpcoreheader, 8, 1); /* bcPlanes - must be 1 */
- PUT_2B(bmpcoreheader, 10, bits_per_pixel); /* bcBitCount */
-
- if (JFWRITE(dest->pub.output_file, bmpfileheader, 14) != (size_t) 14)
- ERREXIT(cinfo, JERR_FILE_WRITE);
- if (JFWRITE(dest->pub.output_file, bmpcoreheader, 12) != (size_t) 12)
- ERREXIT(cinfo, JERR_FILE_WRITE);
-
- if (cmap_entries > 0)
- write_colormap(cinfo, dest, cmap_entries, 3);
-}
-
-
-/*
- * Write the colormap.
- * Windows uses BGR0 map entries; OS/2 uses BGR entries.
- */
-
-LOCAL(void)
-write_colormap (j_decompress_ptr cinfo, bmp_dest_ptr dest,
- int map_colors, int map_entry_size)
-{
- JSAMPARRAY colormap = cinfo->colormap;
- int num_colors = cinfo->actual_number_of_colors;
- FILE * outfile = dest->pub.output_file;
- int i;
-
- if (colormap != NULL) {
- if (cinfo->out_color_components == 3) {
- /* Normal case with RGB colormap */
- for (i = 0; i < num_colors; i++) {
- putc(GETJSAMPLE(colormap[2][i]), outfile);
- putc(GETJSAMPLE(colormap[1][i]), outfile);
- putc(GETJSAMPLE(colormap[0][i]), outfile);
- if (map_entry_size == 4)
- putc(0, outfile);
- }
- } else {
- /* Grayscale colormap (only happens with grayscale quantization) */
- for (i = 0; i < num_colors; i++) {
- putc(GETJSAMPLE(colormap[0][i]), outfile);
- putc(GETJSAMPLE(colormap[0][i]), outfile);
- putc(GETJSAMPLE(colormap[0][i]), outfile);
- if (map_entry_size == 4)
- putc(0, outfile);
- }
- }
- } else {
- /* If no colormap, must be grayscale data. Generate a linear "map". */
- for (i = 0; i < 256; i++) {
- putc(i, outfile);
- putc(i, outfile);
- putc(i, outfile);
- if (map_entry_size == 4)
- putc(0, outfile);
- }
- }
- /* Pad colormap with zeros to ensure specified number of colormap entries */
- if (i > map_colors)
- ERREXIT1(cinfo, JERR_TOO_MANY_COLORS, i);
- for (; i < map_colors; i++) {
- putc(0, outfile);
- putc(0, outfile);
- putc(0, outfile);
- if (map_entry_size == 4)
- putc(0, outfile);
- }
-}
-
-
-METHODDEF(void)
-finish_output_bmp (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo)
-{
- bmp_dest_ptr dest = (bmp_dest_ptr) dinfo;
- register FILE * outfile = dest->pub.output_file;
- JSAMPARRAY image_ptr;
- register JSAMPROW data_ptr;
- JDIMENSION row;
- register JDIMENSION col;
- cd_progress_ptr progress = (cd_progress_ptr) cinfo->progress;
-
- /* Write the header and colormap */
- if (dest->is_os2)
- write_os2_header(cinfo, dest);
- else
- write_bmp_header(cinfo, dest);
-
- /* Write the file body from our virtual array */
- for (row = cinfo->output_height; row > 0; row--) {
- if (progress != NULL) {
- progress->pub.pass_counter = (long) (cinfo->output_height - row);
- progress->pub.pass_limit = (long) cinfo->output_height;
- (*progress->pub.progress_monitor) ((j_common_ptr) cinfo);
- }
- image_ptr = (*cinfo->mem->access_virt_sarray)
- ((j_common_ptr) cinfo, dest->whole_image, row-1, (JDIMENSION) 1, FALSE);
- data_ptr = image_ptr[0];
- for (col = dest->row_width; col > 0; col--) {
- putc(GETJSAMPLE(*data_ptr), outfile);
- data_ptr++;
- }
- }
- if (progress != NULL)
- progress->completed_extra_passes++;
-
- /* Make sure we wrote the output file OK */
- fflush(outfile);
- if (ferror(outfile))
- ERREXIT(cinfo, JERR_FILE_WRITE);
-}
-
-
-/*
- * The module selection routine for BMP format output.
- */
-
-GLOBAL(djpeg_dest_ptr)
-jinit_write_bmp (j_decompress_ptr cinfo, boolean is_os2)
-{
- bmp_dest_ptr dest;
- JDIMENSION row_width;
-
- /* Create module interface object, fill in method pointers */
- dest = (bmp_dest_ptr)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
- SIZEOF(bmp_dest_struct));
- dest->pub.start_output = start_output_bmp;
- dest->pub.finish_output = finish_output_bmp;
- dest->is_os2 = is_os2;
-
- if (cinfo->out_color_space == JCS_GRAYSCALE) {
- dest->pub.put_pixel_rows = put_gray_rows;
- } else if (cinfo->out_color_space == JCS_RGB) {
- if (cinfo->quantize_colors)
- dest->pub.put_pixel_rows = put_gray_rows;
- else
- dest->pub.put_pixel_rows = put_pixel_rows;
- } else {
- ERREXIT(cinfo, JERR_BMP_COLORSPACE);
- }
-
- /* Calculate output image dimensions so we can allocate space */
- jpeg_calc_output_dimensions(cinfo);
-
- /* Determine width of rows in the BMP file (padded to 4-byte boundary). */
- row_width = cinfo->output_width * cinfo->output_components;
- dest->data_width = row_width;
- while ((row_width & 3) != 0) row_width++;
- dest->row_width = row_width;
- dest->pad_bytes = (int) (row_width - dest->data_width);
-
- /* Allocate space for inversion array, prepare for write pass */
- dest->whole_image = (*cinfo->mem->request_virt_sarray)
- ((j_common_ptr) cinfo, JPOOL_IMAGE, FALSE,
- row_width, cinfo->output_height, (JDIMENSION) 1);
- dest->cur_output_row = 0;
- if (cinfo->progress != NULL) {
- cd_progress_ptr progress = (cd_progress_ptr) cinfo->progress;
- progress->total_extra_passes++; /* count file input as separate pass */
- }
-
- /* Create decompressor output buffer. */
- dest->pub.buffer = (*cinfo->mem->alloc_sarray)
- ((j_common_ptr) cinfo, JPOOL_IMAGE, row_width, (JDIMENSION) 1);
- dest->pub.buffer_height = 1;
-
- return (djpeg_dest_ptr) dest;
-}
-
-#endif /* BMP_SUPPORTED */
+++ /dev/null
-/*
- * wrgif.c
- *
- * Copyright (C) 1991-1997, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains routines to write output images in GIF format.
- *
- **************************************************************************
- * NOTE: to avoid entanglements with Unisys' patent on LZW compression, *
- * this code has been modified to output "uncompressed GIF" files. *
- * There is no trace of the LZW algorithm in this file. *
- **************************************************************************
- *
- * These routines may need modification for non-Unix environments or
- * specialized applications. As they stand, they assume output to
- * an ordinary stdio stream.
- */
-
-/*
- * This code is loosely based on ppmtogif from the PBMPLUS distribution
- * of Feb. 1991. That file contains the following copyright notice:
- * Based on GIFENCODE by David Rowley <mgardi@watdscu.waterloo.edu>.
- * Lempel-Ziv compression based on "compress" by Spencer W. Thomas et al.
- * Copyright (C) 1989 by Jef Poskanzer.
- * Permission to use, copy, modify, and distribute this software and its
- * documentation for any purpose and without fee is hereby granted, provided
- * that the above copyright notice appear in all copies and that both that
- * copyright notice and this permission notice appear in supporting
- * documentation. This software is provided "as is" without express or
- * implied warranty.
- *
- * We are also required to state that
- * "The Graphics Interchange Format(c) is the Copyright property of
- * CompuServe Incorporated. GIF(sm) is a Service Mark property of
- * CompuServe Incorporated."
- */
-
-#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
-
-#ifdef GIF_SUPPORTED
-
-
-/* Private version of data destination object */
-
-typedef struct {
- struct djpeg_dest_struct pub; /* public fields */
-
- j_decompress_ptr cinfo; /* back link saves passing separate parm */
-
- /* State for packing variable-width codes into a bitstream */
- int n_bits; /* current number of bits/code */
- int maxcode; /* maximum code, given n_bits */
- INT32 cur_accum; /* holds bits not yet output */
- int cur_bits; /* # of bits in cur_accum */
-
- /* State for GIF code assignment */
- int ClearCode; /* clear code (doesn't change) */
- int EOFCode; /* EOF code (ditto) */
- int code_counter; /* counts output symbols */
-
- /* GIF data packet construction buffer */
- int bytesinpkt; /* # of bytes in current packet */
- char packetbuf[256]; /* workspace for accumulating packet */
-
-} gif_dest_struct;
-
-typedef gif_dest_struct * gif_dest_ptr;
-
-/* Largest value that will fit in N bits */
-#define MAXCODE(n_bits) ((1 << (n_bits)) - 1)
-
-
-/*
- * Routines to package finished data bytes into GIF data blocks.
- * A data block consists of a count byte (1..255) and that many data bytes.
- */
-
-LOCAL(void)
-flush_packet (gif_dest_ptr dinfo)
-/* flush any accumulated data */
-{
- if (dinfo->bytesinpkt > 0) { /* never write zero-length packet */
- dinfo->packetbuf[0] = (char) dinfo->bytesinpkt++;
- if (JFWRITE(dinfo->pub.output_file, dinfo->packetbuf, dinfo->bytesinpkt)
- != (size_t) dinfo->bytesinpkt)
- ERREXIT(dinfo->cinfo, JERR_FILE_WRITE);
- dinfo->bytesinpkt = 0;
- }
-}
-
-
-/* Add a character to current packet; flush to disk if necessary */
-#define CHAR_OUT(dinfo,c) \
- { (dinfo)->packetbuf[++(dinfo)->bytesinpkt] = (char) (c); \
- if ((dinfo)->bytesinpkt >= 255) \
- flush_packet(dinfo); \
- }
-
-
-/* Routine to convert variable-width codes into a byte stream */
-
-LOCAL(void)
-output (gif_dest_ptr dinfo, int code)
-/* Emit a code of n_bits bits */
-/* Uses cur_accum and cur_bits to reblock into 8-bit bytes */
-{
- dinfo->cur_accum |= ((INT32) code) << dinfo->cur_bits;
- dinfo->cur_bits += dinfo->n_bits;
-
- while (dinfo->cur_bits >= 8) {
- CHAR_OUT(dinfo, dinfo->cur_accum & 0xFF);
- dinfo->cur_accum >>= 8;
- dinfo->cur_bits -= 8;
- }
-}
-
-
-/* The pseudo-compression algorithm.
- *
- * In this module we simply output each pixel value as a separate symbol;
- * thus, no compression occurs. In fact, there is expansion of one bit per
- * pixel, because we use a symbol width one bit wider than the pixel width.
- *
- * GIF ordinarily uses variable-width symbols, and the decoder will expect
- * to ratchet up the symbol width after a fixed number of symbols.
- * To simplify the logic and keep the expansion penalty down, we emit a
- * GIF Clear code to reset the decoder just before the width would ratchet up.
- * Thus, all the symbols in the output file will have the same bit width.
- * Note that emitting the Clear codes at the right times is a mere matter of
- * counting output symbols and is in no way dependent on the LZW patent.
- *
- * With a small basic pixel width (low color count), Clear codes will be
- * needed very frequently, causing the file to expand even more. So this
- * simplistic approach wouldn't work too well on bilevel images, for example.
- * But for output of JPEG conversions the pixel width will usually be 8 bits
- * (129 to 256 colors), so the overhead added by Clear symbols is only about
- * one symbol in every 256.
- */
-
-LOCAL(void)
-compress_init (gif_dest_ptr dinfo, int i_bits)
-/* Initialize pseudo-compressor */
-{
- /* init all the state variables */
- dinfo->n_bits = i_bits;
- dinfo->maxcode = MAXCODE(dinfo->n_bits);
- dinfo->ClearCode = (1 << (i_bits - 1));
- dinfo->EOFCode = dinfo->ClearCode + 1;
- dinfo->code_counter = dinfo->ClearCode + 2;
- /* init output buffering vars */
- dinfo->bytesinpkt = 0;
- dinfo->cur_accum = 0;
- dinfo->cur_bits = 0;
- /* GIF specifies an initial Clear code */
- output(dinfo, dinfo->ClearCode);
-}
-
-
-LOCAL(void)
-compress_pixel (gif_dest_ptr dinfo, int c)
-/* Accept and "compress" one pixel value.
- * The given value must be less than n_bits wide.
- */
-{
- /* Output the given pixel value as a symbol. */
- output(dinfo, c);
- /* Issue Clear codes often enough to keep the reader from ratcheting up
- * its symbol size.
- */
- if (dinfo->code_counter < dinfo->maxcode) {
- dinfo->code_counter++;
- } else {
- output(dinfo, dinfo->ClearCode);
- dinfo->code_counter = dinfo->ClearCode + 2; /* reset the counter */
- }
-}
-
-
-LOCAL(void)
-compress_term (gif_dest_ptr dinfo)
-/* Clean up at end */
-{
- /* Send an EOF code */
- output(dinfo, dinfo->EOFCode);
- /* Flush the bit-packing buffer */
- if (dinfo->cur_bits > 0) {
- CHAR_OUT(dinfo, dinfo->cur_accum & 0xFF);
- }
- /* Flush the packet buffer */
- flush_packet(dinfo);
-}
-
-
-/* GIF header construction */
-
-
-LOCAL(void)
-put_word (gif_dest_ptr dinfo, unsigned int w)
-/* Emit a 16-bit word, LSB first */
-{
- putc(w & 0xFF, dinfo->pub.output_file);
- putc((w >> 8) & 0xFF, dinfo->pub.output_file);
-}
-
-
-LOCAL(void)
-put_3bytes (gif_dest_ptr dinfo, int val)
-/* Emit 3 copies of same byte value --- handy subr for colormap construction */
-{
- putc(val, dinfo->pub.output_file);
- putc(val, dinfo->pub.output_file);
- putc(val, dinfo->pub.output_file);
-}
-
-
-LOCAL(void)
-emit_header (gif_dest_ptr dinfo, int num_colors, JSAMPARRAY colormap)
-/* Output the GIF file header, including color map */
-/* If colormap==NULL, synthesize a gray-scale colormap */
-{
- int BitsPerPixel, ColorMapSize, InitCodeSize, FlagByte;
- int cshift = dinfo->cinfo->data_precision - 8;
- int i;
-
- if (num_colors > 256)
- ERREXIT1(dinfo->cinfo, JERR_TOO_MANY_COLORS, num_colors);
- /* Compute bits/pixel and related values */
- BitsPerPixel = 1;
- while (num_colors > (1 << BitsPerPixel))
- BitsPerPixel++;
- ColorMapSize = 1 << BitsPerPixel;
- if (BitsPerPixel <= 1)
- InitCodeSize = 2;
- else
- InitCodeSize = BitsPerPixel;
- /*
- * Write the GIF header.
- * Note that we generate a plain GIF87 header for maximum compatibility.
- */
- putc('G', dinfo->pub.output_file);
- putc('I', dinfo->pub.output_file);
- putc('F', dinfo->pub.output_file);
- putc('8', dinfo->pub.output_file);
- putc('7', dinfo->pub.output_file);
- putc('a', dinfo->pub.output_file);
- /* Write the Logical Screen Descriptor */
- put_word(dinfo, (unsigned int) dinfo->cinfo->output_width);
- put_word(dinfo, (unsigned int) dinfo->cinfo->output_height);
- FlagByte = 0x80; /* Yes, there is a global color table */
- FlagByte |= (BitsPerPixel-1) << 4; /* color resolution */
- FlagByte |= (BitsPerPixel-1); /* size of global color table */
- putc(FlagByte, dinfo->pub.output_file);
- putc(0, dinfo->pub.output_file); /* Background color index */
- putc(0, dinfo->pub.output_file); /* Reserved (aspect ratio in GIF89) */
- /* Write the Global Color Map */
- /* If the color map is more than 8 bits precision, */
- /* we reduce it to 8 bits by shifting */
- for (i=0; i < ColorMapSize; i++) {
- if (i < num_colors) {
- if (colormap != NULL) {
- if (dinfo->cinfo->out_color_space == JCS_RGB) {
- /* Normal case: RGB color map */
- putc(GETJSAMPLE(colormap[0][i]) >> cshift, dinfo->pub.output_file);
- putc(GETJSAMPLE(colormap[1][i]) >> cshift, dinfo->pub.output_file);
- putc(GETJSAMPLE(colormap[2][i]) >> cshift, dinfo->pub.output_file);
- } else {
- /* Grayscale "color map": possible if quantizing grayscale image */
- put_3bytes(dinfo, GETJSAMPLE(colormap[0][i]) >> cshift);
- }
- } else {
- /* Create a gray-scale map of num_colors values, range 0..255 */
- put_3bytes(dinfo, (i * 255 + (num_colors-1)/2) / (num_colors-1));
- }
- } else {
- /* fill out the map to a power of 2 */
- put_3bytes(dinfo, 0);
- }
- }
- /* Write image separator and Image Descriptor */
- putc(',', dinfo->pub.output_file); /* separator */
- put_word(dinfo, 0); /* left/top offset */
- put_word(dinfo, 0);
- put_word(dinfo, (unsigned int) dinfo->cinfo->output_width); /* image size */
- put_word(dinfo, (unsigned int) dinfo->cinfo->output_height);
- /* flag byte: not interlaced, no local color map */
- putc(0x00, dinfo->pub.output_file);
- /* Write Initial Code Size byte */
- putc(InitCodeSize, dinfo->pub.output_file);
-
- /* Initialize for "compression" of image data */
- compress_init(dinfo, InitCodeSize+1);
-}
-
-
-/*
- * Startup: write the file header.
- */
-
-METHODDEF(void)
-start_output_gif (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo)
-{
- gif_dest_ptr dest = (gif_dest_ptr) dinfo;
-
- if (cinfo->quantize_colors)
- emit_header(dest, cinfo->actual_number_of_colors, cinfo->colormap);
- else
- emit_header(dest, 256, (JSAMPARRAY) NULL);
-}
-
-
-/*
- * Write some pixel data.
- * In this module rows_supplied will always be 1.
- */
-
-METHODDEF(void)
-put_pixel_rows (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
- JDIMENSION rows_supplied)
-{
- gif_dest_ptr dest = (gif_dest_ptr) dinfo;
- register JSAMPROW ptr;
- register JDIMENSION col;
-
- ptr = dest->pub.buffer[0];
- for (col = cinfo->output_width; col > 0; col--) {
- compress_pixel(dest, GETJSAMPLE(*ptr++));
- }
-}
-
-
-/*
- * Finish up at the end of the file.
- */
-
-METHODDEF(void)
-finish_output_gif (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo)
-{
- gif_dest_ptr dest = (gif_dest_ptr) dinfo;
-
- /* Flush "compression" mechanism */
- compress_term(dest);
- /* Write a zero-length data block to end the series */
- putc(0, dest->pub.output_file);
- /* Write the GIF terminator mark */
- putc(';', dest->pub.output_file);
- /* Make sure we wrote the output file OK */
- fflush(dest->pub.output_file);
- if (ferror(dest->pub.output_file))
- ERREXIT(cinfo, JERR_FILE_WRITE);
-}
-
-
-/*
- * The module selection routine for GIF format output.
- */
-
-GLOBAL(djpeg_dest_ptr)
-jinit_write_gif (j_decompress_ptr cinfo)
-{
- gif_dest_ptr dest;
-
- /* Create module interface object, fill in method pointers */
- dest = (gif_dest_ptr)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
- SIZEOF(gif_dest_struct));
- dest->cinfo = cinfo; /* make back link for subroutines */
- dest->pub.start_output = start_output_gif;
- dest->pub.put_pixel_rows = put_pixel_rows;
- dest->pub.finish_output = finish_output_gif;
-
- if (cinfo->out_color_space != JCS_GRAYSCALE &&
- cinfo->out_color_space != JCS_RGB)
- ERREXIT(cinfo, JERR_GIF_COLORSPACE);
-
- /* Force quantization if color or if > 8 bits input */
- if (cinfo->out_color_space != JCS_GRAYSCALE || cinfo->data_precision > 8) {
- /* Force quantization to at most 256 colors */
- cinfo->quantize_colors = TRUE;
- if (cinfo->desired_number_of_colors > 256)
- cinfo->desired_number_of_colors = 256;
- }
-
- /* Calculate output image dimensions so we can allocate space */
- jpeg_calc_output_dimensions(cinfo);
-
- if (cinfo->output_components != 1) /* safety check: just one component? */
- ERREXIT(cinfo, JERR_GIF_BUG);
-
- /* Create decompressor output buffer. */
- dest->pub.buffer = (*cinfo->mem->alloc_sarray)
- ((j_common_ptr) cinfo, JPOOL_IMAGE, cinfo->output_width, (JDIMENSION) 1);
- dest->pub.buffer_height = 1;
-
- return (djpeg_dest_ptr) dest;
-}
-
-#endif /* GIF_SUPPORTED */
+++ /dev/null
-/*
- * wrppm.c
- *
- * Copyright (C) 1991-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains routines to write output images in PPM/PGM format.
- * The extended 2-byte-per-sample raw PPM/PGM formats are supported.
- * The PBMPLUS library is NOT required to compile this software
- * (but it is highly useful as a set of PPM image manipulation programs).
- *
- * These routines may need modification for non-Unix environments or
- * specialized applications. As they stand, they assume output to
- * an ordinary stdio stream.
- */
-
-#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
-
-#ifdef PPM_SUPPORTED
-
-
-/*
- * For 12-bit JPEG data, we either downscale the values to 8 bits
- * (to write standard byte-per-sample PPM/PGM files), or output
- * nonstandard word-per-sample PPM/PGM files. Downscaling is done
- * if PPM_NORAWWORD is defined (this can be done in the Makefile
- * or in jconfig.h).
- * (When the core library supports data precision reduction, a cleaner
- * implementation will be to ask for that instead.)
- */
-
-#if BITS_IN_JSAMPLE == 8
-#define PUTPPMSAMPLE(ptr,v) *ptr++ = (char) (v)
-#define BYTESPERSAMPLE 1
-#define PPM_MAXVAL 255
-#else
-#ifdef PPM_NORAWWORD
-#define PUTPPMSAMPLE(ptr,v) *ptr++ = (char) ((v) >> (BITS_IN_JSAMPLE-8))
-#define BYTESPERSAMPLE 1
-#define PPM_MAXVAL 255
-#else
-/* The word-per-sample format always puts the LSB first. */
-#define PUTPPMSAMPLE(ptr,v) \
- { register int val_ = v; \
- *ptr++ = (char) (val_ & 0xFF); \
- *ptr++ = (char) ((val_ >> 8) & 0xFF); \
- }
-#define BYTESPERSAMPLE 2
-#define PPM_MAXVAL ((1<<BITS_IN_JSAMPLE)-1)
-#endif
-#endif
-
-
-/*
- * When JSAMPLE is the same size as char, we can just fwrite() the
- * decompressed data to the PPM or PGM file. On PCs, in order to make this
- * work the output buffer must be allocated in near data space, because we are
- * assuming small-data memory model wherein fwrite() can't reach far memory.
- * If you need to process very wide images on a PC, you might have to compile
- * in large-memory model, or else replace fwrite() with a putc() loop ---
- * which will be much slower.
- */
-
-
-/* Private version of data destination object */
-
-typedef struct {
- struct djpeg_dest_struct pub; /* public fields */
-
- /* Usually these two pointers point to the same place: */
- char *iobuffer; /* fwrite's I/O buffer */
- JSAMPROW pixrow; /* decompressor output buffer */
- size_t buffer_width; /* width of I/O buffer */
- JDIMENSION samples_per_row; /* JSAMPLEs per output row */
-} ppm_dest_struct;
-
-typedef ppm_dest_struct * ppm_dest_ptr;
-
-
-/*
- * Write some pixel data.
- * In this module rows_supplied will always be 1.
- *
- * put_pixel_rows handles the "normal" 8-bit case where the decompressor
- * output buffer is physically the same as the fwrite buffer.
- */
-
-METHODDEF(void)
-put_pixel_rows (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
- JDIMENSION rows_supplied)
-{
- ppm_dest_ptr dest = (ppm_dest_ptr) dinfo;
-
- (void) JFWRITE(dest->pub.output_file, dest->iobuffer, dest->buffer_width);
-}
-
-
-/*
- * This code is used when we have to copy the data and apply a pixel
- * format translation. Typically this only happens in 12-bit mode.
- */
-
-METHODDEF(void)
-copy_pixel_rows (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
- JDIMENSION rows_supplied)
-{
- ppm_dest_ptr dest = (ppm_dest_ptr) dinfo;
- register char * bufferptr;
- register JSAMPROW ptr;
- register JDIMENSION col;
-
- ptr = dest->pub.buffer[0];
- bufferptr = dest->iobuffer;
- for (col = dest->samples_per_row; col > 0; col--) {
- PUTPPMSAMPLE(bufferptr, GETJSAMPLE(*ptr++));
- }
- (void) JFWRITE(dest->pub.output_file, dest->iobuffer, dest->buffer_width);
-}
-
-
-/*
- * Write some pixel data when color quantization is in effect.
- * We have to demap the color index values to straight data.
- */
-
-METHODDEF(void)
-put_demapped_rgb (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
- JDIMENSION rows_supplied)
-{
- ppm_dest_ptr dest = (ppm_dest_ptr) dinfo;
- register char * bufferptr;
- register int pixval;
- register JSAMPROW ptr;
- register JSAMPROW color_map0 = cinfo->colormap[0];
- register JSAMPROW color_map1 = cinfo->colormap[1];
- register JSAMPROW color_map2 = cinfo->colormap[2];
- register JDIMENSION col;
-
- ptr = dest->pub.buffer[0];
- bufferptr = dest->iobuffer;
- for (col = cinfo->output_width; col > 0; col--) {
- pixval = GETJSAMPLE(*ptr++);
- PUTPPMSAMPLE(bufferptr, GETJSAMPLE(color_map0[pixval]));
- PUTPPMSAMPLE(bufferptr, GETJSAMPLE(color_map1[pixval]));
- PUTPPMSAMPLE(bufferptr, GETJSAMPLE(color_map2[pixval]));
- }
- (void) JFWRITE(dest->pub.output_file, dest->iobuffer, dest->buffer_width);
-}
-
-
-METHODDEF(void)
-put_demapped_gray (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
- JDIMENSION rows_supplied)
-{
- ppm_dest_ptr dest = (ppm_dest_ptr) dinfo;
- register char * bufferptr;
- register JSAMPROW ptr;
- register JSAMPROW color_map = cinfo->colormap[0];
- register JDIMENSION col;
-
- ptr = dest->pub.buffer[0];
- bufferptr = dest->iobuffer;
- for (col = cinfo->output_width; col > 0; col--) {
- PUTPPMSAMPLE(bufferptr, GETJSAMPLE(color_map[GETJSAMPLE(*ptr++)]));
- }
- (void) JFWRITE(dest->pub.output_file, dest->iobuffer, dest->buffer_width);
-}
-
-
-/*
- * Startup: write the file header.
- */
-
-METHODDEF(void)
-start_output_ppm (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo)
-{
- ppm_dest_ptr dest = (ppm_dest_ptr) dinfo;
-
- /* Emit file header */
- switch (cinfo->out_color_space) {
- case JCS_GRAYSCALE:
- /* emit header for raw PGM format */
- fprintf(dest->pub.output_file, "P5\n%ld %ld\n%d\n",
- (long) cinfo->output_width, (long) cinfo->output_height,
- PPM_MAXVAL);
- break;
- case JCS_RGB:
- /* emit header for raw PPM format */
- fprintf(dest->pub.output_file, "P6\n%ld %ld\n%d\n",
- (long) cinfo->output_width, (long) cinfo->output_height,
- PPM_MAXVAL);
- break;
- default:
- ERREXIT(cinfo, JERR_PPM_COLORSPACE);
- }
-}
-
-
-/*
- * Finish up at the end of the file.
- */
-
-METHODDEF(void)
-finish_output_ppm (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo)
-{
- /* Make sure we wrote the output file OK */
- fflush(dinfo->output_file);
- if (ferror(dinfo->output_file))
- ERREXIT(cinfo, JERR_FILE_WRITE);
-}
-
-
-/*
- * The module selection routine for PPM format output.
- */
-
-GLOBAL(djpeg_dest_ptr)
-jinit_write_ppm (j_decompress_ptr cinfo)
-{
- ppm_dest_ptr dest;
-
- /* Create module interface object, fill in method pointers */
- dest = (ppm_dest_ptr)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
- SIZEOF(ppm_dest_struct));
- dest->pub.start_output = start_output_ppm;
- dest->pub.finish_output = finish_output_ppm;
-
- /* Calculate output image dimensions so we can allocate space */
- jpeg_calc_output_dimensions(cinfo);
-
- /* Create physical I/O buffer. Note we make this near on a PC. */
- dest->samples_per_row = cinfo->output_width * cinfo->out_color_components;
- dest->buffer_width = dest->samples_per_row * (BYTESPERSAMPLE * SIZEOF(char));
- dest->iobuffer = (char *) (*cinfo->mem->alloc_small)
- ((j_common_ptr) cinfo, JPOOL_IMAGE, dest->buffer_width);
-
- if (cinfo->quantize_colors || BITS_IN_JSAMPLE != 8 ||
- SIZEOF(JSAMPLE) != SIZEOF(char)) {
- /* When quantizing, we need an output buffer for colormap indexes
- * that's separate from the physical I/O buffer. We also need a
- * separate buffer if pixel format translation must take place.
- */
- dest->pub.buffer = (*cinfo->mem->alloc_sarray)
- ((j_common_ptr) cinfo, JPOOL_IMAGE,
- cinfo->output_width * cinfo->output_components, (JDIMENSION) 1);
- dest->pub.buffer_height = 1;
- if (! cinfo->quantize_colors)
- dest->pub.put_pixel_rows = copy_pixel_rows;
- else if (cinfo->out_color_space == JCS_GRAYSCALE)
- dest->pub.put_pixel_rows = put_demapped_gray;
- else
- dest->pub.put_pixel_rows = put_demapped_rgb;
- } else {
- /* We will fwrite() directly from decompressor output buffer. */
- /* Synthesize a JSAMPARRAY pointer structure */
- /* Cast here implies near->far pointer conversion on PCs */
- dest->pixrow = (JSAMPROW) dest->iobuffer;
- dest->pub.buffer = & dest->pixrow;
- dest->pub.buffer_height = 1;
- dest->pub.put_pixel_rows = put_pixel_rows;
- }
-
- return (djpeg_dest_ptr) dest;
-}
-
-#endif /* PPM_SUPPORTED */
+++ /dev/null
-/*
- * wrrle.c
- *
- * Copyright (C) 1991-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains routines to write output images in RLE format.
- * The Utah Raster Toolkit library is required (version 3.1 or later).
- *
- * These routines may need modification for non-Unix environments or
- * specialized applications. As they stand, they assume output to
- * an ordinary stdio stream.
- *
- * Based on code contributed by Mike Lijewski,
- * with updates from Robert Hutchinson.
- */
-
-#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
-
-#ifdef RLE_SUPPORTED
-
-/* rle.h is provided by the Utah Raster Toolkit. */
-
-#include <rle.h>
-
-/*
- * We assume that JSAMPLE has the same representation as rle_pixel,
- * to wit, "unsigned char". Hence we can't cope with 12- or 16-bit samples.
- */
-
-#if BITS_IN_JSAMPLE != 8
- Sorry, this code only copes with 8-bit JSAMPLEs. /* deliberate syntax err */
-#endif
-
-
-/*
- * Since RLE stores scanlines bottom-to-top, we have to invert the image
- * from JPEG's top-to-bottom order. To do this, we save the outgoing data
- * in a virtual array during put_pixel_row calls, then actually emit the
- * RLE file during finish_output.
- */
-
-
-/*
- * For now, if we emit an RLE color map then it is always 256 entries long,
- * though not all of the entries need be used.
- */
-
-#define CMAPBITS 8
-#define CMAPLENGTH (1<<(CMAPBITS))
-
-typedef struct {
- struct djpeg_dest_struct pub; /* public fields */
-
- jvirt_sarray_ptr image; /* virtual array to store the output image */
- rle_map *colormap; /* RLE-style color map, or NULL if none */
- rle_pixel **rle_row; /* To pass rows to rle_putrow() */
-
-} rle_dest_struct;
-
-typedef rle_dest_struct * rle_dest_ptr;
-
-/* Forward declarations */
-METHODDEF(void) rle_put_pixel_rows
- JPP((j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
- JDIMENSION rows_supplied));
-
-
-/*
- * Write the file header.
- *
- * In this module it's easier to wait till finish_output to write anything.
- */
-
-METHODDEF(void)
-start_output_rle (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo)
-{
- rle_dest_ptr dest = (rle_dest_ptr) dinfo;
- size_t cmapsize;
- int i, ci;
-#ifdef PROGRESS_REPORT
- cd_progress_ptr progress = (cd_progress_ptr) cinfo->progress;
-#endif
-
- /*
- * Make sure the image can be stored in RLE format.
- *
- * - RLE stores image dimensions as *signed* 16 bit integers. JPEG
- * uses unsigned, so we have to check the width.
- *
- * - Colorspace is expected to be grayscale or RGB.
- *
- * - The number of channels (components) is expected to be 1 (grayscale/
- * pseudocolor) or 3 (truecolor/directcolor).
- * (could be 2 or 4 if using an alpha channel, but we aren't)
- */
-
- if (cinfo->output_width > 32767 || cinfo->output_height > 32767)
- ERREXIT2(cinfo, JERR_RLE_DIMENSIONS, cinfo->output_width,
- cinfo->output_height);
-
- if (cinfo->out_color_space != JCS_GRAYSCALE &&
- cinfo->out_color_space != JCS_RGB)
- ERREXIT(cinfo, JERR_RLE_COLORSPACE);
-
- if (cinfo->output_components != 1 && cinfo->output_components != 3)
- ERREXIT1(cinfo, JERR_RLE_TOOMANYCHANNELS, cinfo->num_components);
-
- /* Convert colormap, if any, to RLE format. */
-
- dest->colormap = NULL;
-
- if (cinfo->quantize_colors) {
- /* Allocate storage for RLE-style cmap, zero any extra entries */
- cmapsize = cinfo->out_color_components * CMAPLENGTH * SIZEOF(rle_map);
- dest->colormap = (rle_map *) (*cinfo->mem->alloc_small)
- ((j_common_ptr) cinfo, JPOOL_IMAGE, cmapsize);
- MEMZERO(dest->colormap, cmapsize);
-
- /* Save away data in RLE format --- note 8-bit left shift! */
- /* Shifting would need adjustment for JSAMPLEs wider than 8 bits. */
- for (ci = 0; ci < cinfo->out_color_components; ci++) {
- for (i = 0; i < cinfo->actual_number_of_colors; i++) {
- dest->colormap[ci * CMAPLENGTH + i] =
- GETJSAMPLE(cinfo->colormap[ci][i]) << 8;
- }
- }
- }
-
- /* Set the output buffer to the first row */
- dest->pub.buffer = (*cinfo->mem->access_virt_sarray)
- ((j_common_ptr) cinfo, dest->image, (JDIMENSION) 0, (JDIMENSION) 1, TRUE);
- dest->pub.buffer_height = 1;
-
- dest->pub.put_pixel_rows = rle_put_pixel_rows;
-
-#ifdef PROGRESS_REPORT
- if (progress != NULL) {
- progress->total_extra_passes++; /* count file writing as separate pass */
- }
-#endif
-}
-
-
-/*
- * Write some pixel data.
- *
- * This routine just saves the data away in a virtual array.
- */
-
-METHODDEF(void)
-rle_put_pixel_rows (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
- JDIMENSION rows_supplied)
-{
- rle_dest_ptr dest = (rle_dest_ptr) dinfo;
-
- if (cinfo->output_scanline < cinfo->output_height) {
- dest->pub.buffer = (*cinfo->mem->access_virt_sarray)
- ((j_common_ptr) cinfo, dest->image,
- cinfo->output_scanline, (JDIMENSION) 1, TRUE);
- }
-}
-
-/*
- * Finish up at the end of the file.
- *
- * Here is where we really output the RLE file.
- */
-
-METHODDEF(void)
-finish_output_rle (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo)
-{
- rle_dest_ptr dest = (rle_dest_ptr) dinfo;
- rle_hdr header; /* Output file information */
- rle_pixel **rle_row, *red, *green, *blue;
- JSAMPROW output_row;
- char cmapcomment[80];
- int row, col;
- int ci;
-#ifdef PROGRESS_REPORT
- cd_progress_ptr progress = (cd_progress_ptr) cinfo->progress;
-#endif
-
- /* Initialize the header info */
- header = *rle_hdr_init(NULL);
- header.rle_file = dest->pub.output_file;
- header.xmin = 0;
- header.xmax = cinfo->output_width - 1;
- header.ymin = 0;
- header.ymax = cinfo->output_height - 1;
- header.alpha = 0;
- header.ncolors = cinfo->output_components;
- for (ci = 0; ci < cinfo->output_components; ci++) {
- RLE_SET_BIT(header, ci);
- }
- if (cinfo->quantize_colors) {
- header.ncmap = cinfo->out_color_components;
- header.cmaplen = CMAPBITS;
- header.cmap = dest->colormap;
- /* Add a comment to the output image with the true colormap length. */
- sprintf(cmapcomment, "color_map_length=%d", cinfo->actual_number_of_colors);
- rle_putcom(cmapcomment, &header);
- }
-
- /* Emit the RLE header and color map (if any) */
- rle_put_setup(&header);
-
- /* Now output the RLE data from our virtual array.
- * We assume here that (a) rle_pixel is represented the same as JSAMPLE,
- * and (b) we are not on a machine where FAR pointers differ from regular.
- */
-
-#ifdef PROGRESS_REPORT
- if (progress != NULL) {
- progress->pub.pass_limit = cinfo->output_height;
- progress->pub.pass_counter = 0;
- (*progress->pub.progress_monitor) ((j_common_ptr) cinfo);
- }
-#endif
-
- if (cinfo->output_components == 1) {
- for (row = cinfo->output_height-1; row >= 0; row--) {
- rle_row = (rle_pixel **) (*cinfo->mem->access_virt_sarray)
- ((j_common_ptr) cinfo, dest->image,
- (JDIMENSION) row, (JDIMENSION) 1, FALSE);
- rle_putrow(rle_row, (int) cinfo->output_width, &header);
-#ifdef PROGRESS_REPORT
- if (progress != NULL) {
- progress->pub.pass_counter++;
- (*progress->pub.progress_monitor) ((j_common_ptr) cinfo);
- }
-#endif
- }
- } else {
- for (row = cinfo->output_height-1; row >= 0; row--) {
- rle_row = (rle_pixel **) dest->rle_row;
- output_row = * (*cinfo->mem->access_virt_sarray)
- ((j_common_ptr) cinfo, dest->image,
- (JDIMENSION) row, (JDIMENSION) 1, FALSE);
- red = rle_row[0];
- green = rle_row[1];
- blue = rle_row[2];
- for (col = cinfo->output_width; col > 0; col--) {
- *red++ = GETJSAMPLE(*output_row++);
- *green++ = GETJSAMPLE(*output_row++);
- *blue++ = GETJSAMPLE(*output_row++);
- }
- rle_putrow(rle_row, (int) cinfo->output_width, &header);
-#ifdef PROGRESS_REPORT
- if (progress != NULL) {
- progress->pub.pass_counter++;
- (*progress->pub.progress_monitor) ((j_common_ptr) cinfo);
- }
-#endif
- }
- }
-
-#ifdef PROGRESS_REPORT
- if (progress != NULL)
- progress->completed_extra_passes++;
-#endif
-
- /* Emit file trailer */
- rle_puteof(&header);
- fflush(dest->pub.output_file);
- if (ferror(dest->pub.output_file))
- ERREXIT(cinfo, JERR_FILE_WRITE);
-}
-
-
-/*
- * The module selection routine for RLE format output.
- */
-
-GLOBAL(djpeg_dest_ptr)
-jinit_write_rle (j_decompress_ptr cinfo)
-{
- rle_dest_ptr dest;
-
- /* Create module interface object, fill in method pointers */
- dest = (rle_dest_ptr)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
- SIZEOF(rle_dest_struct));
- dest->pub.start_output = start_output_rle;
- dest->pub.finish_output = finish_output_rle;
-
- /* Calculate output image dimensions so we can allocate space */
- jpeg_calc_output_dimensions(cinfo);
-
- /* Allocate a work array for output to the RLE library. */
- dest->rle_row = (*cinfo->mem->alloc_sarray)
- ((j_common_ptr) cinfo, JPOOL_IMAGE,
- cinfo->output_width, (JDIMENSION) cinfo->output_components);
-
- /* Allocate a virtual array to hold the image. */
- dest->image = (*cinfo->mem->request_virt_sarray)
- ((j_common_ptr) cinfo, JPOOL_IMAGE, FALSE,
- (JDIMENSION) (cinfo->output_width * cinfo->output_components),
- cinfo->output_height, (JDIMENSION) 1);
-
- return (djpeg_dest_ptr) dest;
-}
-
-#endif /* RLE_SUPPORTED */
+++ /dev/null
-/*
- * wrtarga.c
- *
- * Copyright (C) 1991-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains routines to write output images in Targa format.
- *
- * These routines may need modification for non-Unix environments or
- * specialized applications. As they stand, they assume output to
- * an ordinary stdio stream.
- *
- * Based on code contributed by Lee Daniel Crocker.
- */
-
-#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
-
-#ifdef TARGA_SUPPORTED
-
-
-/*
- * To support 12-bit JPEG data, we'd have to scale output down to 8 bits.
- * This is not yet implemented.
- */
-
-#if BITS_IN_JSAMPLE != 8
- Sorry, this code only copes with 8-bit JSAMPLEs. /* deliberate syntax err */
-#endif
-
-/*
- * The output buffer needs to be writable by fwrite(). On PCs, we must
- * allocate the buffer in near data space, because we are assuming small-data
- * memory model, wherein fwrite() can't reach far memory. If you need to
- * process very wide images on a PC, you might have to compile in large-memory
- * model, or else replace fwrite() with a putc() loop --- which will be much
- * slower.
- */
-
-
-/* Private version of data destination object */
-
-typedef struct {
- struct djpeg_dest_struct pub; /* public fields */
-
- char *iobuffer; /* physical I/O buffer */
- JDIMENSION buffer_width; /* width of one row */
-} tga_dest_struct;
-
-typedef tga_dest_struct * tga_dest_ptr;
-
-
-LOCAL(void)
-write_header (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo, int num_colors)
-/* Create and write a Targa header */
-{
- char targaheader[18];
-
- /* Set unused fields of header to 0 */
- MEMZERO(targaheader, SIZEOF(targaheader));
-
- if (num_colors > 0) {
- targaheader[1] = 1; /* color map type 1 */
- targaheader[5] = (char) (num_colors & 0xFF);
- targaheader[6] = (char) (num_colors >> 8);
- targaheader[7] = 24; /* 24 bits per cmap entry */
- }
-
- targaheader[12] = (char) (cinfo->output_width & 0xFF);
- targaheader[13] = (char) (cinfo->output_width >> 8);
- targaheader[14] = (char) (cinfo->output_height & 0xFF);
- targaheader[15] = (char) (cinfo->output_height >> 8);
- targaheader[17] = 0x20; /* Top-down, non-interlaced */
-
- if (cinfo->out_color_space == JCS_GRAYSCALE) {
- targaheader[2] = 3; /* image type = uncompressed gray-scale */
- targaheader[16] = 8; /* bits per pixel */
- } else { /* must be RGB */
- if (num_colors > 0) {
- targaheader[2] = 1; /* image type = colormapped RGB */
- targaheader[16] = 8;
- } else {
- targaheader[2] = 2; /* image type = uncompressed RGB */
- targaheader[16] = 24;
- }
- }
-
- if (JFWRITE(dinfo->output_file, targaheader, 18) != (size_t) 18)
- ERREXIT(cinfo, JERR_FILE_WRITE);
-}
-
-
-/*
- * Write some pixel data.
- * In this module rows_supplied will always be 1.
- */
-
-METHODDEF(void)
-put_pixel_rows (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
- JDIMENSION rows_supplied)
-/* used for unquantized full-color output */
-{
- tga_dest_ptr dest = (tga_dest_ptr) dinfo;
- register JSAMPROW inptr;
- register char * outptr;
- register JDIMENSION col;
-
- inptr = dest->pub.buffer[0];
- outptr = dest->iobuffer;
- for (col = cinfo->output_width; col > 0; col--) {
- outptr[0] = (char) GETJSAMPLE(inptr[2]); /* RGB to BGR order */
- outptr[1] = (char) GETJSAMPLE(inptr[1]);
- outptr[2] = (char) GETJSAMPLE(inptr[0]);
- inptr += 3, outptr += 3;
- }
- (void) JFWRITE(dest->pub.output_file, dest->iobuffer, dest->buffer_width);
-}
-
-METHODDEF(void)
-put_gray_rows (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
- JDIMENSION rows_supplied)
-/* used for grayscale OR quantized color output */
-{
- tga_dest_ptr dest = (tga_dest_ptr) dinfo;
- register JSAMPROW inptr;
- register char * outptr;
- register JDIMENSION col;
-
- inptr = dest->pub.buffer[0];
- outptr = dest->iobuffer;
- for (col = cinfo->output_width; col > 0; col--) {
- *outptr++ = (char) GETJSAMPLE(*inptr++);
- }
- (void) JFWRITE(dest->pub.output_file, dest->iobuffer, dest->buffer_width);
-}
-
-
-/*
- * Write some demapped pixel data when color quantization is in effect.
- * For Targa, this is only applied to grayscale data.
- */
-
-METHODDEF(void)
-put_demapped_gray (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
- JDIMENSION rows_supplied)
-{
- tga_dest_ptr dest = (tga_dest_ptr) dinfo;
- register JSAMPROW inptr;
- register char * outptr;
- register JSAMPROW color_map0 = cinfo->colormap[0];
- register JDIMENSION col;
-
- inptr = dest->pub.buffer[0];
- outptr = dest->iobuffer;
- for (col = cinfo->output_width; col > 0; col--) {
- *outptr++ = (char) GETJSAMPLE(color_map0[GETJSAMPLE(*inptr++)]);
- }
- (void) JFWRITE(dest->pub.output_file, dest->iobuffer, dest->buffer_width);
-}
-
-
-/*
- * Startup: write the file header.
- */
-
-METHODDEF(void)
-start_output_tga (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo)
-{
- tga_dest_ptr dest = (tga_dest_ptr) dinfo;
- int num_colors, i;
- FILE *outfile;
-
- if (cinfo->out_color_space == JCS_GRAYSCALE) {
- /* Targa doesn't have a mapped grayscale format, so we will */
- /* demap quantized gray output. Never emit a colormap. */
- write_header(cinfo, dinfo, 0);
- if (cinfo->quantize_colors)
- dest->pub.put_pixel_rows = put_demapped_gray;
- else
- dest->pub.put_pixel_rows = put_gray_rows;
- } else if (cinfo->out_color_space == JCS_RGB) {
- if (cinfo->quantize_colors) {
- /* We only support 8-bit colormap indexes, so only 256 colors */
- num_colors = cinfo->actual_number_of_colors;
- if (num_colors > 256)
- ERREXIT1(cinfo, JERR_TOO_MANY_COLORS, num_colors);
- write_header(cinfo, dinfo, num_colors);
- /* Write the colormap. Note Targa uses BGR byte order */
- outfile = dest->pub.output_file;
- for (i = 0; i < num_colors; i++) {
- putc(GETJSAMPLE(cinfo->colormap[2][i]), outfile);
- putc(GETJSAMPLE(cinfo->colormap[1][i]), outfile);
- putc(GETJSAMPLE(cinfo->colormap[0][i]), outfile);
- }
- dest->pub.put_pixel_rows = put_gray_rows;
- } else {
- write_header(cinfo, dinfo, 0);
- dest->pub.put_pixel_rows = put_pixel_rows;
- }
- } else {
- ERREXIT(cinfo, JERR_TGA_COLORSPACE);
- }
-}
-
-
-/*
- * Finish up at the end of the file.
- */
-
-METHODDEF(void)
-finish_output_tga (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo)
-{
- /* Make sure we wrote the output file OK */
- fflush(dinfo->output_file);
- if (ferror(dinfo->output_file))
- ERREXIT(cinfo, JERR_FILE_WRITE);
-}
-
-
-/*
- * The module selection routine for Targa format output.
- */
-
-GLOBAL(djpeg_dest_ptr)
-jinit_write_targa (j_decompress_ptr cinfo)
-{
- tga_dest_ptr dest;
-
- /* Create module interface object, fill in method pointers */
- dest = (tga_dest_ptr)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
- SIZEOF(tga_dest_struct));
- dest->pub.start_output = start_output_tga;
- dest->pub.finish_output = finish_output_tga;
-
- /* Calculate output image dimensions so we can allocate space */
- jpeg_calc_output_dimensions(cinfo);
-
- /* Create I/O buffer. Note we make this near on a PC. */
- dest->buffer_width = cinfo->output_width * cinfo->output_components;
- dest->iobuffer = (char *)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
- (size_t) (dest->buffer_width * SIZEOF(char)));
-
- /* Create decompressor output buffer. */
- dest->pub.buffer = (*cinfo->mem->alloc_sarray)
- ((j_common_ptr) cinfo, JPOOL_IMAGE, dest->buffer_width, (JDIMENSION) 1);
- dest->pub.buffer_height = 1;
-
- return (djpeg_dest_ptr) dest;
-}
-
-#endif /* TARGA_SUPPORTED */
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