/* $Id: ppm2tiff.c,v 1.19 2015-06-21 01:09:10 bfriesen Exp $ */

/*

 * Copyright (c) 1991-1997 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.

 */

#include "tif_config.h"

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <ctype.h>

#ifdef HAVE_UNISTD_H

# include <unistd.h>

#endif

#ifdef HAVE_FCNTL_H

# include <fcntl.h>

#endif

#ifdef HAVE_IO_H

# include <io.h>

#endif

#ifdef NEED_LIBPORT

# include "libport.h"

#endif

#include "tiffio.h"

#ifndef HAVE_GETOPT

extern int getopt(int, char**, char*);

#endif

#define	streq(a,b)	(strcmp(a,b) == 0)

#define	strneq(a,b,n)	(strncmp(a,b,n) == 0)

static	uint16 compression = COMPRESSION_PACKBITS;

static	uint16 predictor = 0;

static	int quality = 75;	/* JPEG quality */

static	int jpegcolormode = JPEGCOLORMODE_RGB;

static  uint32 g3opts;

static	void usage(void);

static	int processCompressOptions(char*);

static void

BadPPM(char* file)

{

	fprintf(stderr, "%s: Not a PPM file.\n", file);

	exit(-2);

}

static tmsize_t

multiply_ms(tmsize_t m1, tmsize_t m2)

{

	tmsize_t bytes = m1 * m2;

	if (m1 && bytes / m1 != m2)

		bytes = 0;

	return bytes;

}

int

main(int argc, char* argv[])

{

	uint16 photometric = 0;

	uint32 rowsperstrip = (uint32) -1;

	double resolution = -1;

	unsigned char *buf = NULL;

	tmsize_t linebytes = 0;

	uint16 spp = 1;

	uint16 bpp = 8;

	TIFF *out;

	FILE *in;

	unsigned int w, h, prec, row;

	char *infile;

	int c;

#if !HAVE_DECL_OPTARG

	extern int optind;

	extern char* optarg;

#endif

	tmsize_t scanline_size;

	if (argc < 2) {

	    fprintf(stderr, "%s: Too few arguments\n", argv[0]);

	    usage();

	}

	while ((c = getopt(argc, argv, "c:r:R:")) != -1)

		switch (c) {

		case 'c':		/* compression scheme */

			if (!processCompressOptions(optarg))

				usage();

			break;

		case 'r':		/* rows/strip */

			rowsperstrip = atoi(optarg);

			break;

		case 'R':		/* resolution */

			resolution = atof(optarg);

			break;

		case '?':

			usage();

			/*NOTREACHED*/

		}

	if (optind + 2 < argc) {

	    fprintf(stderr, "%s: Too many arguments\n", argv[0]);

	    usage();

	}

	/*

	 * If only one file is specified, read input from

	 * stdin; otherwise usage is: ppm2tiff input output.

	 */

	if (argc - optind > 1) {

		infile = argv[optind++];

		in = fopen(infile, "rb");

		if (in == NULL) {

			fprintf(stderr, "%s: Can not open.\n", infile);

			return (-1);

		}

	} else {

		infile = "<stdin>";

		in = stdin;

#if defined(HAVE_SETMODE) && defined(O_BINARY)

		setmode(fileno(stdin), O_BINARY);

#endif

	}

	if (fgetc(in) != 'P')

		BadPPM(infile);

	switch (fgetc(in)) {

		case '4':			/* it's a PBM file */

			bpp = 1;

			spp = 1;

			photometric = PHOTOMETRIC_MINISWHITE;

			break;

		case '5':			/* it's a PGM file */

			bpp = 8;

			spp = 1;

			photometric = PHOTOMETRIC_MINISBLACK;

			break;

		case '6':			/* it's a PPM file */

			bpp = 8;

			spp = 3;

			photometric = PHOTOMETRIC_RGB;

			if (compression == COMPRESSION_JPEG &&

			    jpegcolormode == JPEGCOLORMODE_RGB)

				photometric = PHOTOMETRIC_YCBCR;

			break;

		default:

			BadPPM(infile);

	}

	/* Parse header */

	while(1) {

		if (feof(in))

			BadPPM(infile);

		c = fgetc(in);

		/* Skip whitespaces (blanks, TABs, CRs, LFs) */

		if (strchr(" \t\r\n", c))

			continue;

		/* Check for comment line */

		if (c == '#') {

			do {

			    c = fgetc(in);

			} while(!(strchr("\r\n", c) || feof(in)));

			continue;

		}

		ungetc(c, in);

		break;

	}

	switch (bpp) {

	case 1:

		if (fscanf(in, " %u %u", &w, &h) != 2)

			BadPPM(infile);

		if (fgetc(in) != '\n')

			BadPPM(infile);

		break;

	case 8:

		if (fscanf(in, " %u %u %u", &w, &h, &prec) != 3)

			BadPPM(infile);

		if (fgetc(in) != '\n' || prec != 255)

			BadPPM(infile);

		break;

	}

	out = TIFFOpen(argv[optind], "w");

	if (out == NULL)

		return (-4);

	TIFFSetField(out, TIFFTAG_IMAGEWIDTH, (uint32) w);

	TIFFSetField(out, TIFFTAG_IMAGELENGTH, (uint32) h);

	TIFFSetField(out, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT);

	TIFFSetField(out, TIFFTAG_SAMPLESPERPIXEL, spp);

	TIFFSetField(out, TIFFTAG_BITSPERSAMPLE, bpp);

	TIFFSetField(out, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);

	TIFFSetField(out, TIFFTAG_PHOTOMETRIC, photometric);

	TIFFSetField(out, TIFFTAG_COMPRESSION, compression);

	switch (compression) {

	case COMPRESSION_JPEG:

		TIFFSetField(out, TIFFTAG_JPEGQUALITY, quality);

		TIFFSetField(out, TIFFTAG_JPEGCOLORMODE, jpegcolormode);

		break;

	case COMPRESSION_LZW:

	case COMPRESSION_DEFLATE:

		if (predictor != 0)

			TIFFSetField(out, TIFFTAG_PREDICTOR, predictor);

		break;

        case COMPRESSION_CCITTFAX3:

		TIFFSetField(out, TIFFTAG_GROUP3OPTIONS, g3opts);

		break;

	}

	switch (bpp) {

		case 1:

			/* if round-up overflows, result will be zero, OK */

			linebytes = (multiply_ms(spp, w) + (8 - 1)) / 8;

			if (rowsperstrip == (uint32) -1) {

				TIFFSetField(out, TIFFTAG_ROWSPERSTRIP, h);

			} else {

				TIFFSetField(out, TIFFTAG_ROWSPERSTRIP,

				    TIFFDefaultStripSize(out, rowsperstrip));

			}

			break;

		case 8:

			linebytes = multiply_ms(spp, w);

			TIFFSetField(out, TIFFTAG_ROWSPERSTRIP,

			    TIFFDefaultStripSize(out, rowsperstrip));

			break;

	}

	if (linebytes == 0) {

		fprintf(stderr, "%s: scanline size overflow\n", infile);

		(void) TIFFClose(out);

		exit(-2);					

	}

	scanline_size = TIFFScanlineSize(out);

	if (scanline_size == 0) {

		/* overflow - TIFFScanlineSize already printed a message */

		(void) TIFFClose(out);

		exit(-2);					

	}

	if (scanline_size < linebytes)

		buf = (unsigned char *)_TIFFmalloc(linebytes);

	else

		buf = (unsigned char *)_TIFFmalloc(scanline_size);

	if (buf == NULL) {

		fprintf(stderr, "%s: Not enough memory\n", infile);

		(void) TIFFClose(out);

		exit(-2);

	}

	if (resolution > 0) {

		TIFFSetField(out, TIFFTAG_XRESOLUTION, resolution);

		TIFFSetField(out, TIFFTAG_YRESOLUTION, resolution);

		TIFFSetField(out, TIFFTAG_RESOLUTIONUNIT, RESUNIT_INCH);

	}

	for (row = 0; row < h; row++) {

		if (fread(buf, linebytes, 1, in) != 1) {

			fprintf(stderr, "%s: scanline %lu: Read error.\n",

			    infile, (unsigned long) row);

			break;

		}

		if (TIFFWriteScanline(out, buf, row, 0) < 0)

			break;

	}

	(void) TIFFClose(out);

	if (buf)

		_TIFFfree(buf);

	return (0);

}

static void

processG3Options(char* cp)

{

	g3opts = 0;

        if( (cp = strchr(cp, ':')) ) {

                do {

                        cp++;

                        if (strneq(cp, "1d", 2))

                                g3opts &= ~GROUP3OPT_2DENCODING;

                        else if (strneq(cp, "2d", 2))

                                g3opts |= GROUP3OPT_2DENCODING;

                        else if (strneq(cp, "fill", 4))

                                g3opts |= GROUP3OPT_FILLBITS;

                        else

                                usage();

                } while( (cp = strchr(cp, ':')) );

        }

}

static int

processCompressOptions(char* opt)

{

	if (streq(opt, "none"))

		compression = COMPRESSION_NONE;

	else if (streq(opt, "packbits"))

		compression = COMPRESSION_PACKBITS;

	else if (strneq(opt, "jpeg", 4)) {

		char* cp = strchr(opt, ':');

                compression = COMPRESSION_JPEG;

                while (cp)

                {

                    if (isdigit((int)cp[1]))

			quality = atoi(cp+1);

                    else if (cp[1] == 'r' )

			jpegcolormode = JPEGCOLORMODE_RAW;

                    else

                        usage();

                    cp = strchr(cp+1,':');

                }

	} else if (strneq(opt, "g3", 2)) {

		processG3Options(opt);

		compression = COMPRESSION_CCITTFAX3;

	} else if (streq(opt, "g4")) {

		compression = COMPRESSION_CCITTFAX4;

	} 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);

}

char* stuff[] = {

"usage: ppm2tiff [options] input.ppm output.tif",

"where options are:",

" -r #		make each strip have no more than # rows",

" -R #		set x&y resolution (dpi)",

"",

" -c jpeg[:opts]  compress output with JPEG encoding",

" -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 (the default)",

" -c g3[:opts]  compress output with CCITT Group 3 encoding",

" -c g4         compress output with CCITT Group 4 encoding",

" -c none	use no compression algorithm on output",

"",

"JPEG options:",

" #		set compression quality level (0-100, default 75)",

" r		output color image as RGB rather than YCbCr",

"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);

}

/* vim: set ts=8 sts=8 sw=8 noet: */

/*

 * Local Variables:

 * mode: c

 * c-basic-offset: 8

 * fill-column: 78

 * End:

 */