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libtiff/tools/bmp2tiff.c

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/* $Id: bmp2tiff.c,v 1.13 2005-10-31 12:59:30 dron Exp $
*
* Project: libtiff tools
* Purpose: Convert Windows BMP files in TIFF.
* Author: Andrey Kiselev, dron@remotesensing.org
*
******************************************************************************
* Copyright (c) 2004, Andrey Kiselev <dron@remotesensing.org>
*
* 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>
#include <sys/types.h>
#include <sys/stat.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#if HAVE_FCNTL_H
# include <fcntl.h>
#endif
#if HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#if HAVE_IO_H
# include <io.h>
#endif
#include "tiffio.h"
#ifndef O_BINARY
# define O_BINARY 0
#endif
enum BMPType
{
BMPT_WIN4, /* BMP used in Windows 3.0/NT 3.51/95 */
BMPT_WIN5, /* BMP used in Windows NT 4.0/98/Me/2000/XP */
BMPT_OS21, /* BMP used in OS/2 PM 1.x */
BMPT_OS22 /* BMP used in OS/2 PM 2.x */
};
/*
* Bitmap file consists of a BMPFileHeader structure followed by a
* BMPInfoHeader structure. An array of BMPColorEntry structures (also called
* a colour table) follows the bitmap information header structure. The colour
* table is followed by a second array of indexes into the colour table (the
* actual bitmap data). Data may be comressed, for 4-bpp and 8-bpp used RLE
* compression.
*
* +---------------------+
* | BMPFileHeader |
* +---------------------+
* | BMPInfoHeader |
* +---------------------+
* | BMPColorEntry array |
* +---------------------+
* | Colour-index array |
* +---------------------+
*
* All numbers stored in Intel order with least significant byte first.
*/
enum BMPComprMethod
{
BMPC_RGB = 0L, /* Uncompressed */
BMPC_RLE8 = 1L, /* RLE for 8 bpp images */
BMPC_RLE4 = 2L, /* RLE for 4 bpp images */
BMPC_BITFIELDS = 3L, /* Bitmap is not compressed and the colour table
* consists of three DWORD color masks that specify
* the red, green, and blue components of each
* pixel. This is valid when used with
* 16- and 32-bpp bitmaps. */
BMPC_JPEG = 4L, /* Indicates that the image is a JPEG image. */
BMPC_PNG = 5L /* Indicates that the image is a PNG image. */
};
enum BMPLCSType /* Type of logical color space. */
{
BMPLT_CALIBRATED_RGB = 0, /* This value indicates that endpoints and
* gamma values are given in the appropriate
* fields. */
BMPLT_DEVICE_RGB = 1,
BMPLT_DEVICE_CMYK = 2
};
typedef struct
{
int32 iCIEX;
int32 iCIEY;
int32 iCIEZ;
} BMPCIEXYZ;
typedef struct /* This structure contains the x, y, and z */
{ /* coordinates of the three colors that */
/* correspond */
BMPCIEXYZ iCIERed; /* to the red, green, and blue endpoints for */
BMPCIEXYZ iCIEGreen; /* a specified logical color space. */
BMPCIEXYZ iCIEBlue;
} BMPCIEXYZTriple;
typedef struct
{
char bType[2]; /* Signature "BM" */
uint32 iSize; /* Size in bytes of the bitmap file. Should
* always be ignored while reading because
* of error in Windows 3.0 SDK's description
* of this field */
uint16 iReserved1; /* Reserved, set as 0 */
uint16 iReserved2; /* Reserved, set as 0 */
uint32 iOffBits; /* Offset of the image from file start in bytes */
} BMPFileHeader;
/* File header size in bytes: */
const int BFH_SIZE = 14;
typedef struct
{
uint32 iSize; /* Size of BMPInfoHeader structure in bytes.
* Should be used to determine start of the
* colour table */
int32 iWidth; /* Image width */
int32 iHeight; /* Image height. If positive, image has bottom
* left origin, if negative --- top left. */
int16 iPlanes; /* Number of image planes (must be set to 1) */
int16 iBitCount; /* Number of bits per pixel (1, 4, 8, 16, 24
* or 32). If 0 then the number of bits per
* pixel is specified or is implied by the
* JPEG or PNG format. */
uint32 iCompression; /* Compression method */
uint32 iSizeImage; /* Size of uncomressed image in bytes. May
* be 0 for BMPC_RGB bitmaps. If iCompression
* is BI_JPEG or BI_PNG, iSizeImage indicates
* the size of the JPEG or PNG image buffer. */
int32 iXPelsPerMeter; /* X resolution, pixels per meter (0 if not used) */
int32 iYPelsPerMeter; /* Y resolution, pixels per meter (0 if not used) */
uint32 iClrUsed; /* Size of colour table. If 0, iBitCount should
* be used to calculate this value
* (1<<iBitCount). This value should be
* unsigned for proper shifting. */
int32 iClrImportant; /* Number of important colours. If 0, all
* colours are required */
/*
* Fields above should be used for bitmaps, compatible with Windows NT 3.51
* and earlier. Windows 98/Me, Windows 2000/XP introduces additional fields:
*/
int32 iRedMask; /* Colour mask that specifies the red component
* of each pixel, valid only if iCompression
* is set to BI_BITFIELDS. */
int32 iGreenMask; /* The same for green component */
int32 iBlueMask; /* The same for blue component */
int32 iAlphaMask; /* Colour mask that specifies the alpha
* component of each pixel. */
uint32 iCSType; /* Colour space of the DIB. */
BMPCIEXYZTriple sEndpoints; /* This member is ignored unless the iCSType
* member specifies BMPLT_CALIBRATED_RGB. */
int32 iGammaRed; /* Toned response curve for red. This member
* is ignored unless color values are
* calibrated RGB values and iCSType is set to
* BMPLT_CALIBRATED_RGB. Specified
* in 16^16 format. */
int32 iGammaGreen; /* Toned response curve for green. */
int32 iGammaBlue; /* Toned response curve for blue. */
} BMPInfoHeader;
/*
* Info header size in bytes:
*/
const unsigned int BIH_WIN4SIZE = 40; /* for BMPT_WIN4 */
const unsigned int BIH_WIN5SIZE = 57; /* for BMPT_WIN5 */
const unsigned int BIH_OS21SIZE = 12; /* for BMPT_OS21 */
const unsigned int BIH_OS22SIZE = 64; /* for BMPT_OS22 */
/*
* We will use plain byte array instead of this structure, but declaration
* provided for reference
*/
typedef struct
{
char bBlue;
char bGreen;
char bRed;
char bReserved; /* Must be 0 */
} BMPColorEntry;
static uint16 compression = (uint16) -1;
static int jpegcolormode = JPEGCOLORMODE_RGB;
static int quality = 75; /* JPEG quality */
static uint16 predictor = 0;
static void usage(void);
static int processCompressOptions(char*);
static void rearrangePixels(char *, uint32, uint32);
int
main(int argc, char* argv[])
{
uint32 width, length;
uint16 nbands = 1; /* number of bands in input image */
uint16 depth = 8; /* bits per pixel in input image */
uint32 rowsperstrip = (uint32) -1;
uint16 photometric = PHOTOMETRIC_MINISBLACK;
int fd;
struct stat instat;
char *outfilename = NULL, *infilename = NULL;
TIFF *out = NULL;
BMPFileHeader file_hdr;
BMPInfoHeader info_hdr;
int bmp_type;
uint32 clr_tbl_size, n_clr_elems = 3;
unsigned char *clr_tbl;
unsigned short *red_tbl = NULL, *green_tbl = NULL, *blue_tbl = NULL;
uint32 row, clr;
int c;
extern int optind;
extern char* optarg;
while ((c = getopt(argc, argv, "c:r:o:h")) != -1) {
switch (c) {
case 'c': /* compression scheme */
if (!processCompressOptions(optarg))
usage();
break;
case 'r': /* rows/strip */
rowsperstrip = atoi(optarg);
break;
case 'o':
outfilename = optarg;
break;
case 'h':
usage();
default:
break;
}
}
if (argc - optind < 2)
usage();
infilename = argv[optind];
fd = open(infilename, O_RDONLY|O_BINARY, 0);
if (fd < 0) {
TIFFError(infilename, "Cannot open input file");
return -1;
}
read(fd, file_hdr.bType, 2);
if(file_hdr.bType[0] != 'B' || file_hdr.bType[1] != 'M') {
TIFFError(infilename, "File is not BMP");
goto bad;
}
/* -------------------------------------------------------------------- */
/* Read the BMPFileHeader. We need iOffBits value only */
/* -------------------------------------------------------------------- */
lseek(fd, 10, SEEK_SET);
read(fd, &file_hdr.iOffBits, 4);
#ifdef WORDS_BIGENDIAN
TIFFSwabLong(&file_hdr.iOffBits);
#endif
fstat(fd, &instat);
file_hdr.iSize = instat.st_size;
/* -------------------------------------------------------------------- */
/* Read the BMPInfoHeader. */
/* -------------------------------------------------------------------- */
lseek(fd, BFH_SIZE, SEEK_SET);
read(fd, &info_hdr.iSize, 4);
#ifdef WORDS_BIGENDIAN
TIFFSwabLong(&info_hdr.iSize);
#endif
if (info_hdr.iSize == BIH_WIN4SIZE)
bmp_type = BMPT_WIN4;
else if (info_hdr.iSize == BIH_OS21SIZE)
bmp_type = BMPT_OS21;
else if (info_hdr.iSize == BIH_OS22SIZE || info_hdr.iSize == 16)
bmp_type = BMPT_OS22;
else
bmp_type = BMPT_WIN5;
if (bmp_type == BMPT_WIN4 || bmp_type == BMPT_WIN5 || bmp_type == BMPT_OS22) {
read(fd, &info_hdr.iWidth, 4);
read(fd, &info_hdr.iHeight, 4);
read(fd, &info_hdr.iPlanes, 2);
read(fd, &info_hdr.iBitCount, 2);
read(fd, &info_hdr.iCompression, 4);
read(fd, &info_hdr.iSizeImage, 4);
read(fd, &info_hdr.iXPelsPerMeter, 4);
read(fd, &info_hdr.iYPelsPerMeter, 4);
read(fd, &info_hdr.iClrUsed, 4);
read(fd, &info_hdr.iClrImportant, 4);
#ifdef WORDS_BIGENDIAN
TIFFSwabLong(&info_hdr.iWidth);
TIFFSwabLong(&info_hdr.iHeight);
TIFFSwabShort(&info_hdr.iPlanes);
TIFFSwabShort(&info_hdr.iBitCount);
TIFFSwabLong(&info_hdr.iCompression);
TIFFSwabLong(&info_hdr.iSizeImage);
TIFFSwabLong(&info_hdr.iXPelsPerMeter);
TIFFSwabLong(&info_hdr.iYPelsPerMeter);
TIFFSwabLong(&info_hdr.iClrUsed);
TIFFSwabLong(&info_hdr.iClrImportant);
#endif
n_clr_elems = 4;
}
if (bmp_type == BMPT_OS22) {
/*
* FIXME: different info in different documents
* regarding this!
*/
n_clr_elems = 3;
}
if (bmp_type == BMPT_OS21) {
int16 iShort;
read(fd, &iShort, 2);
#ifdef WORDS_BIGENDIAN
TIFFSwabShort(&iShort);
#endif
info_hdr.iWidth = iShort;
read(fd, &iShort, 2);
#ifdef WORDS_BIGENDIAN
TIFFSwabShort(&iShort);
#endif
info_hdr.iHeight = iShort;
read(fd, &iShort, 2);
#ifdef WORDS_BIGENDIAN
TIFFSwabShort(&iShort);
#endif
info_hdr.iPlanes = iShort;
read(fd, &iShort, 2);
#ifdef WORDS_BIGENDIAN
TIFFSwabShort(&iShort);
#endif
info_hdr.iBitCount = iShort;
info_hdr.iCompression = BMPC_RGB;
n_clr_elems = 3;
}
if (info_hdr.iBitCount != 1 && info_hdr.iBitCount != 4 &&
info_hdr.iBitCount != 8 && info_hdr.iBitCount != 16 &&
info_hdr.iBitCount != 24 && info_hdr.iBitCount != 32) {
TIFFError(infilename, "Cannot process BMP file with bit count %d",
info_hdr.iBitCount);
close(fd);
return 0;
}
width = info_hdr.iWidth;
length = (info_hdr.iHeight > 0) ? info_hdr.iHeight : -info_hdr.iHeight;
switch (info_hdr.iBitCount)
{
case 1:
case 4:
case 8:
nbands = 1;
depth = info_hdr.iBitCount;
photometric = PHOTOMETRIC_PALETTE;
/* Allocate memory for colour table and read it. */
if (info_hdr.iClrUsed)
clr_tbl_size = ((uint32)(1 << depth) < info_hdr.iClrUsed) ?
1 << depth : info_hdr.iClrUsed;
else
clr_tbl_size = 1 << depth;
clr_tbl = (unsigned char *)
_TIFFmalloc(n_clr_elems * clr_tbl_size);
if (!clr_tbl) {
TIFFError(infilename,
"Can't allocate space for color table");
goto bad;
}
lseek(fd, BFH_SIZE + info_hdr.iSize, SEEK_SET);
read(fd, clr_tbl, n_clr_elems * clr_tbl_size);
red_tbl = (unsigned short*)
_TIFFmalloc(1<<depth * sizeof(unsigned short));
if (!red_tbl) {
TIFFError(infilename,
"Can't allocate space for red component table");
_TIFFfree(clr_tbl);
goto bad1;
}
green_tbl = (unsigned short*)
_TIFFmalloc(1<<depth * sizeof(unsigned short));
if (!green_tbl) {
TIFFError(infilename,
"Can't allocate space for green component table");
_TIFFfree(clr_tbl);
goto bad2;
}
blue_tbl = (unsigned short*)
_TIFFmalloc(1<<depth * sizeof(unsigned short));
if (!blue_tbl) {
TIFFError(infilename,
"Can't allocate space for blue component table");
_TIFFfree(clr_tbl);
goto bad3;
}
for(clr = 0; clr < clr_tbl_size; clr++) {
red_tbl[clr] = 257 * clr_tbl[clr*n_clr_elems+2];
green_tbl[clr] = 257 * clr_tbl[clr*n_clr_elems+1];
blue_tbl[clr] = 257 * clr_tbl[clr*n_clr_elems];
}
_TIFFfree(clr_tbl);
break;
case 16:
case 24:
nbands = 3;
depth = info_hdr.iBitCount / nbands;
photometric = PHOTOMETRIC_RGB;
break;
case 32:
nbands = 3;
depth = 8;
photometric = PHOTOMETRIC_RGB;
break;
default:
break;
}
/* -------------------------------------------------------------------- */
/* Create output file. */
/* -------------------------------------------------------------------- */
if (outfilename == NULL)
outfilename = argv[optind+1];
out = TIFFOpen(outfilename, "w");
if (out == NULL) {
TIFFError(infilename, "Cannot open file %s for output",
outfilename);
goto bad3;
}
TIFFSetField(out, TIFFTAG_IMAGEWIDTH, width);
TIFFSetField(out, TIFFTAG_IMAGELENGTH, length);
TIFFSetField(out, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT);
TIFFSetField(out, TIFFTAG_SAMPLESPERPIXEL, nbands);
TIFFSetField(out, TIFFTAG_BITSPERSAMPLE, depth);
TIFFSetField(out, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
TIFFSetField(out, TIFFTAG_PHOTOMETRIC, photometric);
TIFFSetField(out, TIFFTAG_ROWSPERSTRIP,
TIFFDefaultStripSize(out, rowsperstrip));
if (red_tbl && green_tbl && blue_tbl)
TIFFSetField(out, TIFFTAG_COLORMAP, red_tbl, green_tbl, blue_tbl);
if (compression == (uint16) -1)
compression = COMPRESSION_PACKBITS;
TIFFSetField(out, TIFFTAG_COMPRESSION, compression);
switch (compression) {
case COMPRESSION_JPEG:
if (photometric == PHOTOMETRIC_RGB
&& jpegcolormode == JPEGCOLORMODE_RGB)
photometric = PHOTOMETRIC_YCBCR;
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;
}
/* -------------------------------------------------------------------- */
/* Read uncompressed image data. */
/* -------------------------------------------------------------------- */
if (info_hdr.iCompression == BMPC_RGB) {
uint32 offset, size;
char *scanbuf;
/* XXX: Avoid integer overflow. We can calculate size in one
* step using
*
* size = ((width * info_hdr.iBitCount + 31) & ~31) / 8
*
* formulae, but we should check for overflow conditions
* during calculation.
*/
size = width * info_hdr.iBitCount + 31;
if (!width || !info_hdr.iBitCount
|| (size - 31) / info_hdr.iBitCount != width )
{
TIFFError(infilename,
"Wrong image parameters; "
"can't allocate space for scanline buffer");
goto bad3;
}
size = (size & ~31) / 8;
scanbuf = (char *) _TIFFmalloc(size);
if (!scanbuf) {
TIFFError(infilename,
"Can't allocate space for scanline buffer");
goto bad3;
}
for (row = 0; row < length; row++) {
if (info_hdr.iHeight > 0)
offset = file_hdr.iOffBits + (length - row - 1) * size;
else
offset = file_hdr.iOffBits + row * size;
if (lseek(fd, offset, SEEK_SET) == (off_t)-1) {
TIFFError(infilename,
"scanline %lu: Seek error",
(unsigned long) row);
break;
}
if (read(fd, scanbuf, size) < 0) {
TIFFError(infilename,
"scanline %lu: Read error",
(unsigned long) row);
break;
}
rearrangePixels(scanbuf, width, info_hdr.iBitCount);
if (TIFFWriteScanline(out, scanbuf, row, 0) < 0) {
TIFFError(infilename,
"scanline %lu: Write error",
(unsigned long) row);
break;
}
}
_TIFFfree(scanbuf);
/* -------------------------------------------------------------------- */
/* Read compressed image data. */
/* -------------------------------------------------------------------- */
} else if ( info_hdr.iCompression == BMPC_RLE8
|| info_hdr.iCompression == BMPC_RLE4 ) {
uint32 i, j, k, runlength;
uint32 compr_size, uncompr_size;
unsigned char *comprbuf;
unsigned char *uncomprbuf;
compr_size = file_hdr.iSize - file_hdr.iOffBits;
uncompr_size = width * length;
comprbuf = (unsigned char *) _TIFFmalloc( compr_size );
if (!comprbuf) {
TIFFError(infilename,
"Can't allocate space for compressed scanline buffer");
goto bad3;
}
uncomprbuf = (unsigned char *) _TIFFmalloc( uncompr_size );
if (!uncomprbuf) {
TIFFError(infilename,
"Can't allocate space for uncompressed scanline buffer");
goto bad3;
}
lseek(fd, file_hdr.iOffBits, SEEK_SET);
read(fd, comprbuf, compr_size);
i = 0;
j = 0;
if (info_hdr.iBitCount == 8) { /* RLE8 */
while( j < uncompr_size && i < compr_size ) {
if ( comprbuf[i] ) {
runlength = comprbuf[i++];
while( runlength > 0
&& j < uncompr_size
&& i < compr_size ) {
uncomprbuf[j++] = comprbuf[i];
runlength--;
}
i++;
} else {
i++;
if ( comprbuf[i] == 0 ) /* Next scanline */
i++;
else if ( comprbuf[i] == 1 ) /* End of image */
break;
else if ( comprbuf[i] == 2 ) { /* Move to... */
i++;
if ( i < compr_size - 1 ) {
j += comprbuf[i] + comprbuf[i+1] * width;
i += 2;
}
else
break;
} else { /* Absolute mode */
runlength = comprbuf[i++];
for ( k = 0; k < runlength && j < uncompr_size && i < compr_size; k++ )
uncomprbuf[j++] = comprbuf[i++];
if ( k & 0x01 )
i++;
}
}
}
}
else { /* RLE4 */
while( j < uncompr_size && i < compr_size ) {
if ( comprbuf[i] ) {
runlength = comprbuf[i++];
while( runlength > 0 && j < uncompr_size && i < compr_size ) {
if ( runlength & 0x01 )
uncomprbuf[j++] = (comprbuf[i] & 0xF0) >> 4;
else
uncomprbuf[j++] = comprbuf[i] & 0x0F;
runlength--;
}
i++;
} else {
i++;
if ( comprbuf[i] == 0 ) /* Next scanline */
i++;
else if ( comprbuf[i] == 1 ) /* End of image */
break;
else if ( comprbuf[i] == 2 ) { /* Move to... */
i++;
if ( i < compr_size - 1 ) {
j += comprbuf[i] + comprbuf[i+1] * width;
i += 2;
}
else
break;
} else { /* Absolute mode */
runlength = comprbuf[i++];
for ( k = 0; k < runlength && j < uncompr_size && i < compr_size; k++) {
if ( k & 0x01 )
uncomprbuf[j++] = comprbuf[i++] & 0x0F;
else
uncomprbuf[j++] = (comprbuf[i] & 0xF0) >> 4;
}
if ( k & 0x01 )
i++;
}
}
}
}
_TIFFfree(comprbuf);
for (row = 0; row < length; row++) {
if (TIFFWriteScanline(out, uncomprbuf + (length - row - 1) * width, row, 0) < 0) {
TIFFError(infilename,
"scanline %lu: Write error.\n",
(unsigned long) row);
}
}
_TIFFfree(uncomprbuf);
}
bad3:
if (blue_tbl)
_TIFFfree(blue_tbl);
bad2:
if (green_tbl)
_TIFFfree(green_tbl);
bad1:
if (red_tbl)
_TIFFfree(red_tbl);
bad:
close(fd);
if (out)
TIFFClose(out);
return 0;
}
/*
* Image data in BMP file stored in BGR (or ABGR) format. We should rearrange
* pixels to RGB (RGBA) format.
*/
static void
rearrangePixels(char *buf, uint32 width, uint32 bit_count)
{
char tmp;
uint32 i;
switch(bit_count) {
case 16: /* FIXME: need a sample file */
break;
case 24:
for (i = 0; i < width; i++, buf += 3) {
tmp = *buf;
*buf = *(buf + 2);
*(buf + 2) = tmp;
}
break;
case 32:
{
char *buf1 = buf;
for (i = 0; i < width; i++, buf += 4) {
tmp = *buf;
*buf1++ = *(buf + 2);
*buf1++ = *(buf + 1);
*buf1++ = tmp;
}
}
break;
default:
break;
}
}
static int
processCompressOptions(char* opt)
{
if (strcmp(opt, "none") == 0)
compression = COMPRESSION_NONE;
else if (strcmp(opt, "packbits") == 0)
compression = COMPRESSION_PACKBITS;
else if (strncmp(opt, "jpeg", 4) == 0) {
char* cp = strchr(opt, ':');
if (cp && isdigit((int)cp[1]))
quality = atoi(cp+1);
if (cp && strchr(cp, 'r'))
jpegcolormode = JPEGCOLORMODE_RAW;
compression = COMPRESSION_JPEG;
} else if (strncmp(opt, "lzw", 3) == 0) {
char* cp = strchr(opt, ':');
if (cp)
predictor = atoi(cp+1);
compression = COMPRESSION_LZW;
} else if (strncmp(opt, "zip", 3) == 0) {
char* cp = strchr(opt, ':');
if (cp)
predictor = atoi(cp+1);
compression = COMPRESSION_DEFLATE;
} else
return (0);
return (1);
}
static char* stuff[] = {
"bmp2tiff --- convert Windows BMP files to TIFF",
"usage: bmp2tiff [options] input.bmp 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 jpeg[:opts]compress output with JPEG encoding",
" -c packbits compress output with packbits 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",
"For example, -c jpeg:r:50 to get JPEG-encoded RGB data with 50% comp. quality",
"",
"LZW and deflate options:",
" # set predictor value",
"For example, -c lzw:2 to get LZW-encoded data with horizontal differencing",
" -o out.tif write output to out.tif",
" -h this help message",
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: */
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