/* $Id: tiff2rgba.c,v 1.19 2011-02-23 21:46:09 fwarmerdam 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></stdio.h>

#include <string.h></string.h>

#include <stdlib.h></stdlib.h>

#ifdef HAVE_UNISTD_H

# include <unistd.h></unistd.h>

#endif

#ifdef NEED_LIBPORT

# include "libport.h"

#endif

#include "tiffiop.h"

#include "tiffio.h"

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

#define	CopyField(tag, v) \

    if (TIFFGetField(in, tag, &v)) TIFFSetField(out, tag, v)

#ifndef howmany

#define	howmany(x, y)	(((x)+((y)-1))/(y))

#endif

#define	roundup(x, y)	(howmany(x,y)*((uint32)(y)))

uint16 compression = COMPRESSION_PACKBITS;

uint32 rowsperstrip = (uint32) -1;

int process_by_block = 0; /* default is whole image at once */

int no_alpha = 0;

int bigtiff_output = 0;

static int tiffcvt(TIFF* in, TIFF* out);

static void usage(int code);

int

main(int argc, char* argv[])

{

	TIFF *in, *out;

	int c;

	extern int optind;

	extern char *optarg;

	while ((c = getopt(argc, argv, "c:r:t:bn8")) != -1)

		switch (c) {

			case 'b':

				process_by_block = 1;

				break;

			case 'c':

				if (streq(optarg, "none"))

					compression = COMPRESSION_NONE;

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

					compression = COMPRESSION_PACKBITS;

				else if (streq(optarg, "lzw"))

					compression = COMPRESSION_LZW;

				else if (streq(optarg, "jpeg"))

					compression = COMPRESSION_JPEG;

				else if (streq(optarg, "zip"))

					compression = COMPRESSION_DEFLATE;

				else

					usage(-1);

				break;

			case 'r':

				rowsperstrip = atoi(optarg);

				break;

			case 't':

				rowsperstrip = atoi(optarg);

				break;

			case 'n':

				no_alpha = 1;

				break;

			case '8':

				bigtiff_output = 1;

				break;

			case '?':

				usage(0);

				/*NOTREACHED*/

		}

	if (argc - optind < 2)

		usage(-1);

	out = TIFFOpen(argv[argc-1], bigtiff_output?"w8":"w");

	if (out == NULL)

		return (-2);

	for (; optind < argc-1; optind++) {

		in = TIFFOpen(argv[optind], "r");

		if (in != NULL) {

			do {

				if (!tiffcvt(in, out) ||

				    !TIFFWriteDirectory(out)) {

					(void) TIFFClose(out);

					(void) TIFFClose(in);

					return (1);

				}

			} while (TIFFReadDirectory(in));

			(void) TIFFClose(in);

		}

	}

	(void) TIFFClose(out);

	return (0);

}

static int

cvt_by_tile( TIFF *in, TIFF *out )

{

    uint32* raster;			/* retrieve RGBA image */

    uint32  width, height;		/* image width & height */

    uint32  tile_width, tile_height;

    uint32  row, col;

    uint32  *wrk_line;

    int	    ok = 1;

    TIFFGetField(in, TIFFTAG_IMAGEWIDTH, &width);

    TIFFGetField(in, TIFFTAG_IMAGELENGTH, &height);

    if( !TIFFGetField(in, TIFFTAG_TILEWIDTH, &tile_width)

        || !TIFFGetField(in, TIFFTAG_TILELENGTH, &tile_height) ) {

        TIFFError(TIFFFileName(in), "Source image not tiled");

        return (0);

    }

    TIFFSetField(out, TIFFTAG_TILEWIDTH, tile_width );

    TIFFSetField(out, TIFFTAG_TILELENGTH, tile_height );

    /*

     * Allocate tile buffer

     */

    raster = (uint32*)_TIFFmalloc(tile_width * tile_height * sizeof (uint32));

    if (raster == 0) {

        TIFFError(TIFFFileName(in), "No space for raster buffer");

        return (0);

    }

    /*

     * Allocate a scanline buffer for swapping during the vertical

     * mirroring pass.

     */

    wrk_line = (uint32*)_TIFFmalloc(tile_width * sizeof (uint32));

    if (!wrk_line) {

        TIFFError(TIFFFileName(in), "No space for raster scanline buffer");

        ok = 0;

    }

    /*

     * Loop over the tiles.

     */

    for( row = 0; ok && row < height; row += tile_height )

    {

        for( col = 0; ok && col < width; col += tile_width )

        {

            uint32 i_row;

            /* Read the tile into an RGBA array */

            if (!TIFFReadRGBATile(in, col, row, raster)) {

                ok = 0;

                break;

            }

	    /*

	     * XXX: raster array has 4-byte unsigned integer type, that is why

	     * we should rearrange it here.

	     */

#if HOST_BIGENDIAN

	    TIFFSwabArrayOfLong(raster, tile_width * tile_height);

#endif

            /*

             * For some reason the TIFFReadRGBATile() function chooses the

             * lower left corner as the origin.  Vertically mirror scanlines.

             */

            for( i_row = 0; i_row < tile_height / 2; i_row++ )

            {

                uint32	*top_line, *bottom_line;

                top_line = raster + tile_width * i_row;

                bottom_line = raster + tile_width * (tile_height-i_row-1);

                _TIFFmemcpy(wrk_line, top_line, 4*tile_width);

                _TIFFmemcpy(top_line, bottom_line, 4*tile_width);

                _TIFFmemcpy(bottom_line, wrk_line, 4*tile_width);

            }

            /*

             * Write out the result in a tile.

             */

            if( TIFFWriteEncodedTile( out,

                                      TIFFComputeTile( out, col, row, 0, 0),

                                      raster,

                                      4 * tile_width * tile_height ) == -1 )

            {

                ok = 0;

                break;

            }

        }

    }

    _TIFFfree( raster );

    _TIFFfree( wrk_line );

    return ok;

}

static int

cvt_by_strip( TIFF *in, TIFF *out )

{

    uint32* raster;			/* retrieve RGBA image */

    uint32  width, height;		/* image width & height */

    uint32  row;

    uint32  *wrk_line;

    int	    ok = 1;

    TIFFGetField(in, TIFFTAG_IMAGEWIDTH, &width);

    TIFFGetField(in, TIFFTAG_IMAGELENGTH, &height);

    if( !TIFFGetField(in, TIFFTAG_ROWSPERSTRIP, &rowsperstrip) ) {

        TIFFError(TIFFFileName(in), "Source image not in strips");

        return (0);

    }

    TIFFSetField(out, TIFFTAG_ROWSPERSTRIP, rowsperstrip);

    /*

     * Allocate strip buffer

     */

    raster = (uint32*)_TIFFmalloc(width * rowsperstrip * sizeof (uint32));

    if (raster == 0) {

        TIFFError(TIFFFileName(in), "No space for raster buffer");

        return (0);

    }

    /*

     * Allocate a scanline buffer for swapping during the vertical

     * mirroring pass.

     */

    wrk_line = (uint32*)_TIFFmalloc(width * sizeof (uint32));

    if (!wrk_line) {

        TIFFError(TIFFFileName(in), "No space for raster scanline buffer");

        ok = 0;

    }

    /*

     * Loop over the strips.

     */

    for( row = 0; ok && row < height; row += rowsperstrip )

    {

        int	rows_to_write, i_row;

        /* Read the strip into an RGBA array */

        if (!TIFFReadRGBAStrip(in, row, raster)) {

            ok = 0;

            break;

        }

	/*

	 * XXX: raster array has 4-byte unsigned integer type, that is why

	 * we should rearrange it here.

	 */

#if HOST_BIGENDIAN

	TIFFSwabArrayOfLong(raster, width * rowsperstrip);

#endif

        /*

         * Figure out the number of scanlines actually in this strip.

         */

        if( row + rowsperstrip > height )

            rows_to_write = height - row;

        else

            rows_to_write = rowsperstrip;

        /*

         * For some reason the TIFFReadRGBAStrip() function chooses the

         * lower left corner as the origin.  Vertically mirror scanlines.

         */

        for( i_row = 0; i_row < rows_to_write / 2; i_row++ )

        {

            uint32	*top_line, *bottom_line;

            top_line = raster + width * i_row;

            bottom_line = raster + width * (rows_to_write-i_row-1);

            _TIFFmemcpy(wrk_line, top_line, 4*width);

            _TIFFmemcpy(top_line, bottom_line, 4*width);

            _TIFFmemcpy(bottom_line, wrk_line, 4*width);

        }

        /*

         * Write out the result in a strip

         */

        if( TIFFWriteEncodedStrip( out, row / rowsperstrip, raster,

                                   4 * rows_to_write * width ) == -1 )

        {

            ok = 0;

            break;

        }

    }

    _TIFFfree( raster );

    _TIFFfree( wrk_line );

    return ok;

}

/*

 * cvt_whole_image()

 *

 * read the whole image into one big RGBA buffer and then write out

 * strips from that.  This is using the traditional TIFFReadRGBAImage()

 * API that we trust.

 */

static int

cvt_whole_image( TIFF *in, TIFF *out )

{

    uint32* raster;			/* retrieve RGBA image */

    uint32  width, height;		/* image width & height */

    uint32  row;

    size_t pixel_count;

    TIFFGetField(in, TIFFTAG_IMAGEWIDTH, &width);

    TIFFGetField(in, TIFFTAG_IMAGELENGTH, &height);

    pixel_count = width * height;

    /* XXX: Check the integer overflow. */

    if (!width || !height || pixel_count / width != height) {

        TIFFError(TIFFFileName(in),

		  "Malformed input file; can't allocate buffer for raster of %lux%lu size",

		  (unsigned long)width, (unsigned long)height);

        return 0;

    }

    rowsperstrip = TIFFDefaultStripSize(out, rowsperstrip);

    TIFFSetField(out, TIFFTAG_ROWSPERSTRIP, rowsperstrip);

    raster = (uint32*)_TIFFCheckMalloc(in, pixel_count, sizeof(uint32), "raster buffer");

    if (raster == 0) {

        TIFFError(TIFFFileName(in), "Failed to allocate buffer (%lu elements of %lu each)",

		  (unsigned long)pixel_count, (unsigned long)sizeof(uint32));

        return (0);

    }

    /* Read the image in one chunk into an RGBA array */

    if (!TIFFReadRGBAImageOriented(in, width, height, raster,

                                   ORIENTATION_TOPLEFT, 0)) {

        _TIFFfree(raster);

        return (0);

    }

    /*

     * XXX: raster array has 4-byte unsigned integer type, that is why

     * we should rearrange it here.

     */

#if HOST_BIGENDIAN

    TIFFSwabArrayOfLong(raster, width * height);

#endif

    /*

     * Do we want to strip away alpha components?

     */

    if (no_alpha)

    {

        size_t count = pixel_count;

        unsigned char *src, *dst;

	src = dst = (unsigned char *) raster;

        while (count > 0)

        {

	    *(dst++) = *(src++);

	    *(dst++) = *(src++);

	    *(dst++) = *(src++);

	    src++;

	    count--;

        }

    }

    /*

     * Write out the result in strips

     */

    for (row = 0; row < height; row += rowsperstrip)

    {

        unsigned char * raster_strip;

        int	rows_to_write;

        int	bytes_per_pixel;

        if (no_alpha)

        {

            raster_strip = ((unsigned char *) raster) + 3 * row * width;

            bytes_per_pixel = 3;

        }

        else

        {

            raster_strip = (unsigned char *) (raster + row * width);

            bytes_per_pixel = 4;

        }

        if( row + rowsperstrip > height )

            rows_to_write = height - row;

        else

            rows_to_write = rowsperstrip;

        if( TIFFWriteEncodedStrip( out, row / rowsperstrip, raster_strip,

                             bytes_per_pixel * rows_to_write * width ) == -1 )

        {

            _TIFFfree( raster );

            return 0;

        }

    }

    _TIFFfree( raster );

    return 1;

}

static int

tiffcvt(TIFF* in, TIFF* out)

{

	uint32 width, height;		/* image width & height */

	uint16 shortv;

	float floatv;

	char *stringv;

	uint32 longv;

        uint16 v[1];

	TIFFGetField(in, TIFFTAG_IMAGEWIDTH, &width);

	TIFFGetField(in, TIFFTAG_IMAGELENGTH, &height);

	CopyField(TIFFTAG_SUBFILETYPE, longv);

	TIFFSetField(out, TIFFTAG_IMAGEWIDTH, width);

	TIFFSetField(out, TIFFTAG_IMAGELENGTH, height);

	TIFFSetField(out, TIFFTAG_BITSPERSAMPLE, 8);

	TIFFSetField(out, TIFFTAG_COMPRESSION, compression);

	TIFFSetField(out, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_RGB);

	CopyField(TIFFTAG_FILLORDER, shortv);

	TIFFSetField(out, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT);

        if( no_alpha )

            TIFFSetField(out, TIFFTAG_SAMPLESPERPIXEL, 3);

        else

            TIFFSetField(out, TIFFTAG_SAMPLESPERPIXEL, 4);

        if( !no_alpha )

        {

            v[0] = EXTRASAMPLE_ASSOCALPHA;

            TIFFSetField(out, TIFFTAG_EXTRASAMPLES, 1, v);

        }

	CopyField(TIFFTAG_XRESOLUTION, floatv);

	CopyField(TIFFTAG_YRESOLUTION, floatv);

	CopyField(TIFFTAG_RESOLUTIONUNIT, shortv);

	TIFFSetField(out, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);

	TIFFSetField(out, TIFFTAG_SOFTWARE, TIFFGetVersion());

	CopyField(TIFFTAG_DOCUMENTNAME, stringv);

        if( process_by_block && TIFFIsTiled( in ) )

            return( cvt_by_tile( in, out ) );

        else if( process_by_block )

            return( cvt_by_strip( in, out ) );

        else

            return( cvt_whole_image( in, out ) );

}

static char* stuff[] = {

    "usage: tiff2rgba [-c comp] [-r rows] [-b] [-n] [-8] input... output",

    "where comp is one of the following compression algorithms:",

    " jpeg\t\tJPEG encoding",

    " zip\t\tLempel-Ziv & Welch encoding",

    " lzw\t\tLempel-Ziv & Welch encoding",

    " packbits\tPackBits encoding",

    " none\t\tno compression",

    "and the other options are:",

    " -r\trows/strip",

    " -b (progress by block rather than as a whole image)",

    " -n don't emit alpha component.",

    " -8 write BigTIFF file instead of ClassicTIFF",

    NULL

};

static void

usage(int code)

{

	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(code);

}

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

/*

 * Local Variables:

 * mode: c

 * c-basic-offset: 8

 * fill-column: 78

 * End:

 */