summaryrefslogtreecommitdiff
path: root/tiff/tools/gif2tiff.c
diff options
context:
space:
mode:
Diffstat (limited to 'tiff/tools/gif2tiff.c')
-rw-r--r--tiff/tools/gif2tiff.c522
1 files changed, 0 insertions, 522 deletions
diff --git a/tiff/tools/gif2tiff.c b/tiff/tools/gif2tiff.c
deleted file mode 100644
index 9c2cfa4..0000000
--- a/tiff/tools/gif2tiff.c
+++ /dev/null
@@ -1,522 +0,0 @@
-/* $Id: gif2tiff.c,v 1.8.2.1 2010-06-08 18:50:44 bfriesen Exp $ */
-
-/*
- * Copyright (c) 1990-1997 Sam Leffler
- * Copyright (c) 1991-1997 Silicon Graphics, Inc.
- *
- * Permission to use, copy, modify, distribute, and sell this software and
- * its documentation for any purpose is hereby granted without fee, provided
- * that (i) the above copyright notices and this permission notice appear in
- * all copies of the software and related documentation, and (ii) the names of
- * Sam Leffler and Silicon Graphics may not be used in any advertising or
- * publicity relating to the software without the specific, prior written
- * permission of Sam Leffler and Silicon Graphics.
- *
- * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
- * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
- *
- * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
- * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
- * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
- * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
- * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
- * OF THIS SOFTWARE.
- */
-
-/*
- * convert a GIF file into a TIFF file.
- * based on Paul Haeberli's fromgif program which in turn is
- * based on a GIF file reader by Marcel J.E. Mol March 23 1989
- *
- * if input is 320 by 200 pixel aspect is probably 1.2
- * if input is 640 350 pixel aspect is probably 1.37
- *
- */
-#include "tif_config.h"
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <math.h>
-
-#ifdef HAVE_UNISTD_H
-# include <unistd.h>
-#endif
-
-#include "tiffio.h"
-
-#define GIFGAMMA (1.5) /* smaller makes output img brighter */
-#define IMAX 0xffff /* max intensity value */
-#define EXTRAFUDGE 128 /* some people write BAD .gif files */
-
-#define streq(a,b) (strcmp(a,b) == 0)
-#define strneq(a,b,n) (strncmp(a,b,n) == 0)
-
-unsigned short gamtab[256];
-
-void
-makegamtab(float gam)
-{
- int i;
-
- for(i=0; i<256; i++)
- gamtab[i] = (unsigned short) (IMAX*pow(i/255.0,gam)+0.5);
-}
-
-char* stuff[] = {
-"usage: gif2tiff [options] input.gif output.tif",
-"where options are:",
-" -r # make each strip have no more than # rows",
-"",
-" -c lzw[:opts] compress output with Lempel-Ziv & Welch encoding",
-" -c zip[:opts] compress output with deflate encoding",
-" -c packbits compress output with packbits encoding",
-" -c none use no compression algorithm on output",
-"",
-"LZW and deflate options:",
-" # set predictor value",
-"For example, -c lzw:2 to get LZW-encoded data with horizontal differencing",
-NULL
-};
-
-static void
-usage(void)
-{
- char buf[BUFSIZ];
- int i;
-
- setbuf(stderr, buf);
- fprintf(stderr, "%s\n\n", TIFFGetVersion());
- for (i = 0; stuff[i] != NULL; i++)
- fprintf(stderr, "%s\n", stuff[i]);
- exit(-1);
-}
-
-#define COLSIZE 256
-
-unsigned char *stackp;
-unsigned int prefix[4096];
-unsigned char suffix[4096];
-unsigned char stack[4096];
-int datasize,codesize,codemask; /* Decoder working variables */
-int clear,eoi; /* Special code values */
-int avail, oldcode;
-
-FILE *infile;
-int global; /* Is there a global color map? */
-int globalbits; /* Number of bits of global colors */
-unsigned char globalmap[COLSIZE][3];/* RGB values for global color map */
-unsigned char *raster; /* Decoded image data */
-unsigned long width, height;
-unsigned short red[COLSIZE];
-unsigned short green[COLSIZE];
-unsigned short blue[COLSIZE];
-char *filename, *imagename;
-
-static uint16 compression = COMPRESSION_PACKBITS;
-static uint16 predictor = 0;
-static uint32 rowsperstrip = (uint32) -1;
-static int processCompressOptions(char*);
-
-int convert(void);
-int checksignature(void);
-void readscreen(void);
-int readgifimage(char*);
-void readextension(void);
-int readraster(void);
-int process(int, unsigned char**);
-void initcolors(unsigned char [COLSIZE][3], int);
-void rasterize(int, char*);
-
-int
-main(int argc, char* argv[])
-{
- extern int optind;
- extern char *optarg;
- int c, status;
-
- while ((c = getopt(argc, argv, "c:r:")) != -1)
- switch (c) {
- case 'c': /* compression scheme */
- if (!processCompressOptions(optarg))
- usage();
- break;
- case 'r': /* rows/strip */
- rowsperstrip = atoi(optarg);
- break;
- case '?':
- usage();
- /*NOTREACHED*/
- }
- if (argc - optind != 2)
- usage();
-
- makegamtab(GIFGAMMA);
- filename = argv[optind];
- imagename = argv[optind+1];
- if ((infile = fopen(imagename, "rb")) != NULL) {
- int c;
- fclose(infile);
- printf("overwrite %s? ", imagename); fflush(stdout);
- c = getc(stdin);
- if (c != 'y' && c != 'Y')
- return (1);
- }
- if ((infile = fopen(filename, "rb")) == NULL) {
- perror(filename);
- return (1);
- }
- status = convert();
- fclose(infile);
- return (status);
-}
-
-static int
-processCompressOptions(char* opt)
-{
- if (streq(opt, "none"))
- compression = COMPRESSION_NONE;
- else if (streq(opt, "packbits"))
- compression = COMPRESSION_PACKBITS;
- else if (strneq(opt, "lzw", 3)) {
- char* cp = strchr(opt, ':');
- if (cp)
- predictor = atoi(cp+1);
- compression = COMPRESSION_LZW;
- } else if (strneq(opt, "zip", 3)) {
- char* cp = strchr(opt, ':');
- if (cp)
- predictor = atoi(cp+1);
- compression = COMPRESSION_DEFLATE;
- } else
- return (0);
- return (1);
-}
-
-int
-convert(void)
-{
- int ch;
- char* mode = "w";
-
- if (!checksignature())
- return (-1);
- readscreen();
- while ((ch = getc(infile)) != ';' && ch != EOF) {
- switch (ch) {
- case '\0': break; /* this kludge for non-standard files */
- case ',': if (!readgifimage(mode))
- return (-1);
- mode = "a"; /* subsequent images append */
- break;
- case '!': readextension();
- break;
- default: fprintf(stderr, "illegal GIF block type\n");
- return (-1);
- }
- }
- return (0);
-}
-
-int
-checksignature(void)
-{
- char buf[6];
-
- fread(buf,1,6,infile);
- if (strncmp(buf,"GIF",3)) {
- fprintf(stderr, "file is not a GIF file\n");
- return 0;
- }
- if (strncmp(&buf[3],"87a",3)) {
- fprintf(stderr, "unknown GIF version number\n");
- return 0;
- }
- return 1;
-}
-
-/*
- * readscreen -
- * Get information which is global to all the images stored
- * in the file
- */
-void
-readscreen(void)
-{
- unsigned char buf[7];
-
- fread(buf,1,7,infile);
- global = buf[4] & 0x80;
- if (global) {
- globalbits = (buf[4] & 0x07) + 1;
- fread(globalmap,3,1<<globalbits,infile);
- }
-}
-
-int
-readgifimage(char* mode)
-{
- unsigned char buf[9];
- int local, interleaved;
- unsigned char localmap[256][3];
- int localbits;
- int status;
-
- if (fread(buf, 1, 9, infile) == 0) {
- perror(filename);
- return (0);
- }
- width = buf[4] + (buf[5] << 8);
- height = buf[6] + (buf[7] << 8);
- local = buf[8] & 0x80;
- interleaved = buf[8] & 0x40;
-
- if (local == 0 && global == 0) {
- fprintf(stderr, "no colormap present for image\n");
- return (0);
- }
- if ((raster = (unsigned char*) _TIFFmalloc(width*height+EXTRAFUDGE)) == NULL) {
- fprintf(stderr, "not enough memory for image\n");
- return (0);
- }
- if (local) {
- localbits = (buf[8] & 0x7) + 1;
-
- fprintf(stderr, " local colors: %d\n", 1<<localbits);
-
- fread(localmap, 3, 1<<localbits, infile);
- initcolors(localmap, 1<<localbits);
- } else if (global) {
- initcolors(globalmap, 1<<globalbits);
- }
- if ((status = readraster()))
- rasterize(interleaved, mode);
- _TIFFfree(raster);
- return status;
-}
-
-/*
- * readextension -
- * Read a GIF extension block (and do nothing with it).
- *
- */
-void
-readextension(void)
-{
- int count;
- char buf[255];
-
- (void) getc(infile);
- while ((count = getc(infile)))
- fread(buf, 1, count, infile);
-}
-
-/*
- * readraster -
- * Decode a raster image
- *
- */
-int
-readraster(void)
-{
- unsigned char *fill = raster;
- unsigned char buf[255];
- register int bits=0;
- register unsigned long datum=0;
- register unsigned char *ch;
- register int count, code;
- int status = 1;
-
- datasize = getc(infile);
- clear = 1 << datasize;
- eoi = clear + 1;
- avail = clear + 2;
- oldcode = -1;
- codesize = datasize + 1;
- codemask = (1 << codesize) - 1;
- for (code = 0; code < clear; code++) {
- prefix[code] = 0;
- suffix[code] = code;
- }
- stackp = stack;
- for (count = getc(infile); count > 0; count = getc(infile)) {
- fread(buf,1,count,infile);
- for (ch=buf; count-- > 0; ch++) {
- datum += (unsigned long) *ch << bits;
- bits += 8;
- while (bits >= codesize) {
- code = datum & codemask;
- datum >>= codesize;
- bits -= codesize;
- if (code == eoi) { /* This kludge put in */
- goto exitloop; /* because some GIF files*/
- } /* aren't standard */
- if (!process(code, &fill)) {
- status = 0;
- goto exitloop;
- }
- }
- }
- if (fill >= raster + width*height) {
- fprintf(stderr, "raster full before eoi code\n");
- break;
- }
- }
-exitloop:
- if (fill != raster + width*height) {
- fprintf(stderr, "warning: wrong rastersize: %ld bytes\n",
- (long) (fill-raster));
- fprintf(stderr, " instead of %ld bytes\n",
- (long) width*height);
- }
- return status;
-}
-
-/*
- * process -
- * Process a compression code. "clear" resets the code table.
- * Otherwise make a new code table entry, and output the bytes
- * associated with the code.
- */
-int
-process(register int code, unsigned char** fill)
-{
- int incode;
- static unsigned char firstchar;
-
- if (code == clear) {
- codesize = datasize + 1;
- codemask = (1 << codesize) - 1;
- avail = clear + 2;
- oldcode = -1;
- return 1;
- }
-
- if (oldcode == -1) {
- *(*fill)++ = suffix[code];
- firstchar = oldcode = code;
- return 1;
- }
- if (code > avail) {
- fprintf(stderr, "code %d too large for %d\n", code, avail);
- return 0;
- }
-
- incode = code;
- if (code == avail) { /* the first code is always < avail */
- *stackp++ = firstchar;
- code = oldcode;
- }
- while (code > clear) {
- *stackp++ = suffix[code];
- code = prefix[code];
- }
-
- *stackp++ = firstchar = suffix[code];
- prefix[avail] = oldcode;
- suffix[avail] = firstchar;
- avail++;
-
- if (((avail & codemask) == 0) && (avail < 4096)) {
- codesize++;
- codemask += avail;
- }
- oldcode = incode;
- do {
- *(*fill)++ = *--stackp;
- } while (stackp > stack);
- return 1;
-}
-
-/*
- * initcolors -
- * Convert a color map (local or global) to arrays with R, G and B
- * values.
- *
- */
-void
-initcolors(unsigned char colormap[COLSIZE][3], int ncolors)
-{
- register int i;
-
- for (i = 0; i < ncolors; i++) {
- red[i] = gamtab[colormap[i][0]];
- green[i] = gamtab[colormap[i][1]];
- blue[i] = gamtab[colormap[i][2]];
- }
-}
-
-void
-rasterize(int interleaved, char* mode)
-{
- register unsigned long row;
- unsigned char *newras;
- unsigned char *ras;
- TIFF *tif;
- tstrip_t strip;
- tsize_t stripsize;
-
- if ((newras = (unsigned char*) _TIFFmalloc(width*height+EXTRAFUDGE)) == NULL) {
- fprintf(stderr, "not enough memory for image\n");
- return;
- }
-#define DRAWSEGMENT(offset, step) { \
- for (row = offset; row < height; row += step) { \
- _TIFFmemcpy(newras + row*width, ras, width);\
- ras += width; \
- } \
- }
- ras = raster;
- if (interleaved) {
- DRAWSEGMENT(0, 8);
- DRAWSEGMENT(4, 8);
- DRAWSEGMENT(2, 4);
- DRAWSEGMENT(1, 2);
- } else
- DRAWSEGMENT(0, 1);
-#undef DRAWSEGMENT
-
- tif = TIFFOpen(imagename, mode);
- if (!tif) {
- TIFFError(imagename,"Can not open output image");
- exit(-1);
- }
- TIFFSetField(tif, TIFFTAG_IMAGEWIDTH, (uint32) width);
- TIFFSetField(tif, TIFFTAG_IMAGELENGTH, (uint32) height);
- TIFFSetField(tif, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_PALETTE);
- TIFFSetField(tif, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
- TIFFSetField(tif, TIFFTAG_SAMPLESPERPIXEL, 1);
- TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, 8);
- TIFFSetField(tif, TIFFTAG_ROWSPERSTRIP,
- rowsperstrip = TIFFDefaultStripSize(tif, rowsperstrip));
- TIFFSetField(tif, TIFFTAG_COMPRESSION, compression);
- switch (compression) {
- case COMPRESSION_LZW:
- case COMPRESSION_DEFLATE:
- if (predictor != 0)
- TIFFSetField(tif, TIFFTAG_PREDICTOR, predictor);
- break;
- }
- TIFFSetField(tif, TIFFTAG_COLORMAP, red, green, blue);
- TIFFSetField(tif, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT);
- strip = 0;
- stripsize = TIFFStripSize(tif);
- for (row=0; row<height; row += rowsperstrip) {
- if (TIFFWriteEncodedStrip(tif, strip, newras+row*width, stripsize) < 0)
- break;
- strip++;
- }
- TIFFClose(tif);
-
- _TIFFfree(newras);
-}
-
-/* vim: set ts=8 sts=8 sw=8 noet: */
-/*
- * Local Variables:
- * mode: c
- * c-basic-offset: 8
- * fill-column: 78
- * End:
- */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-02 23:18:13 +0000