728 lines
23 KiB
C
728 lines
23 KiB
C
/* $Id: bmp2tiff.c,v 1.6 2004-08-25 18:34:55 dron Exp $
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*
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* Project: libtiff tools
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* Purpose: Convert Windows BMP files in TIFF.
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* Author: Andrey Kiselev, dron@remotesensing.org
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*
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******************************************************************************
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* Copyright (c) 2004, Andrey Kiselev <dron@remotesensing.org>
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*
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* Permission to use, copy, modify, distribute, and sell this software and
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* its documentation for any purpose is hereby granted without fee, provided
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* that (i) the above copyright notices and this permission notice appear in
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* all copies of the software and related documentation, and (ii) the names of
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* Sam Leffler and Silicon Graphics may not be used in any advertising or
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* publicity relating to the software without the specific, prior written
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* permission of Sam Leffler and Silicon Graphics.
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*
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* THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
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* WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
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*
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* IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
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* ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
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* OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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* WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
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* LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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* OF THIS SOFTWARE.
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*/
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#include "tif_config.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include "tiffio.h"
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enum BMPType
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{
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BMPT_WIN4, /* BMP used in Windows 3.0/NT 3.51/95 */
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BMPT_WIN5, /* BMP used in Windows NT 4.0/98/Me/2000/XP */
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BMPT_OS21, /* BMP used in OS/2 PM 1.x */
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BMPT_OS22 /* BMP used in OS/2 PM 2.x */
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};
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/*
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* Bitmap file consists of a BMPFileHeader structure followed by a
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* BMPInfoHeader structure. An array of BMPColorEntry structures (also called
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* a colour table) follows the bitmap information header structure. The colour
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* table is followed by a second array of indexes into the colour table (the
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* actual bitmap data). Data may be comressed, for 4-bpp and 8-bpp used RLE
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* compression.
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*
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* +---------------------+
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* | BMPFileHeader |
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* +---------------------+
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* | BMPInfoHeader |
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* +---------------------+
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* | BMPColorEntry array |
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* +---------------------+
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* | Colour-index array |
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* +---------------------+
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*
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* All numbers stored in Intel order with least significant byte first.
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*/
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enum BMPComprMethod
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{
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BMPC_RGB = 0L, /* Uncompressed */
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BMPC_RLE8 = 1L, /* RLE for 8 bpp images */
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BMPC_RLE4 = 2L, /* RLE for 4 bpp images */
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BMPC_BITFIELDS = 3L, /* Bitmap is not compressed and the colour table
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* consists of three DWORD color masks that specify
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* the red, green, and blue components of each
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* pixel. This is valid when used with
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* 16- and 32-bpp bitmaps. */
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BMPC_JPEG = 4L, /* Indicates that the image is a JPEG image. */
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BMPC_PNG = 5L /* Indicates that the image is a PNG image. */
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};
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enum BMPLCSType /* Type of logical color space. */
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{
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BMPLT_CALIBRATED_RGB = 0, /* This value indicates that endpoints and
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* gamma values are given in the appropriate
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* fields. */
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BMPLT_DEVICE_RGB = 1,
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BMPLT_DEVICE_CMYK = 2
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};
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typedef struct
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{
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int32 iCIEX;
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int32 iCIEY;
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int32 iCIEZ;
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} BMPCIEXYZ;
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typedef struct /* This structure contains the x, y, and z */
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{ /* coordinates of the three colors that */
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/* correspond */
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BMPCIEXYZ iCIERed; /* to the red, green, and blue endpoints for */
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BMPCIEXYZ iCIEGreen; /* a specified logical color space. */
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BMPCIEXYZ iCIEBlue;
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} BMPCIEXYZTriple;
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typedef struct
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{
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char bType[2]; /* Signature "BM" */
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uint32 iSize; /* Size in bytes of the bitmap file. Should
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* always be ignored while reading because
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* of error in Windows 3.0 SDK's description
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* of this field */
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uint16 iReserved1; /* Reserved, set as 0 */
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uint16 iReserved2; /* Reserved, set as 0 */
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uint32 iOffBits; /* Offset of the image from file start in bytes */
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} BMPFileHeader;
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/* File header size in bytes: */
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const int BFH_SIZE = 14;
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typedef struct
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{
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uint32 iSize; /* Size of BMPInfoHeader structure in bytes.
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* Should be used to determine start of the
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* colour table */
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int32 iWidth; /* Image width */
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int32 iHeight; /* Image height. If positive, image has bottom
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* left origin, if negative --- top left. */
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int16 iPlanes; /* Number of image planes (must be set to 1) */
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int16 iBitCount; /* Number of bits per pixel (1, 4, 8, 16, 24
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* or 32). If 0 then the number of bits per
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* pixel is specified or is implied by the
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* JPEG or PNG format. */
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uint32 iCompression; /* Compression method */
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uint32 iSizeImage; /* Size of uncomressed image in bytes. May
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* be 0 for BMPC_RGB bitmaps. If iCompression
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* is BI_JPEG or BI_PNG, iSizeImage indicates
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* the size of the JPEG or PNG image buffer. */
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int32 iXPelsPerMeter; /* X resolution, pixels per meter (0 if not used) */
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int32 iYPelsPerMeter; /* Y resolution, pixels per meter (0 if not used) */
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int32 iClrUsed; /* Size of colour table. If 0, iBitCount should
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* be used to calculate this value
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* (1<<iBitCount) */
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int32 iClrImportant; /* Number of important colours. If 0, all
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* colours are required */
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/*
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* Fields above should be used for bitmaps, compatible with Windows NT 3.51
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* and earlier. Windows 98/Me, Windows 2000/XP introduces additional fields:
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*/
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int32 iRedMask; /* Colour mask that specifies the red component
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* of each pixel, valid only if iCompression
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* is set to BI_BITFIELDS. */
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int32 iGreenMask; /* The same for green component */
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int32 iBlueMask; /* The same for blue component */
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int32 iAlphaMask; /* Colour mask that specifies the alpha
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* component of each pixel. */
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uint32 iCSType; /* Colour space of the DIB. */
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BMPCIEXYZTriple sEndpoints; /* This member is ignored unless the iCSType
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* member specifies BMPLT_CALIBRATED_RGB. */
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int32 iGammaRed; /* Toned response curve for red. This member
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* is ignored unless color values are
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* calibrated RGB values and iCSType is set to
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* BMPLT_CALIBRATED_RGB. Specified
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* in 16^16 format. */
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int32 iGammaGreen; /* Toned response curve for green. */
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int32 iGammaBlue; /* Toned response curve for blue. */
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} BMPInfoHeader;
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/*
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* Info header size in bytes:
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*/
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const unsigned int BIH_WIN4SIZE = 40; /* for BMPT_WIN4 */
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const unsigned int BIH_WIN5SIZE = 57; /* for BMPT_WIN5 */
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const unsigned int BIH_OS21SIZE = 12; /* for BMPT_OS21 */
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const unsigned int BIH_OS22SIZE = 64; /* for BMPT_OS22 */
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/*
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* We will use plain byte array instead of this structure, but declaration
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* provided for reference
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*/
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typedef struct
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{
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char bBlue;
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char bGreen;
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char bRed;
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char bReserved; /* Must be 0 */
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} BMPColorEntry;
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static uint16 compression = (uint16) -1;
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static int jpegcolormode = JPEGCOLORMODE_RGB;
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static int quality = 75; /* JPEG quality */
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static uint16 predictor = 0;
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static void usage(void);
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static int processCompressOptions(char*);
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static void rearrangePixels(char *, uint32, uint32);
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int
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main(int argc, char* argv[])
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{
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uint32 width, length;
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uint32 nbands = 1; /* number of bands in input image */
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int depth = 8; /* bits per pixel in input image */
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uint32 rowsperstrip = (uint32) -1;
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uint16 photometric = PHOTOMETRIC_MINISBLACK;
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FILE *in;
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struct stat instat;
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char *outfilename = NULL;
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TIFF *out;
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BMPFileHeader file_hdr;
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BMPInfoHeader info_hdr;
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int bmp_type;
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uint32 clr_tbl_size, n_clr_elems = 3;
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unsigned char *clr_tbl;
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unsigned short *red_tbl = NULL, *green_tbl = NULL, *blue_tbl = NULL;
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uint32 row, clr;
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int c;
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extern int optind;
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extern char* optarg;
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while ((c = getopt(argc, argv, "c:r:o:h")) != -1) {
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switch (c) {
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case 'c': /* compression scheme */
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if (!processCompressOptions(optarg))
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usage();
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break;
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case 'r': /* rows/strip */
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rowsperstrip = atoi(optarg);
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break;
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case 'o':
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outfilename = optarg;
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break;
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case 'h':
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usage();
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default:
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break;
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}
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}
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if (argc - optind < 2)
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usage();
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in = fopen(argv[optind], "rb");
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if (in == NULL) {
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fprintf(stderr, "%s: %s: Cannot open input file.\n",
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argv[0], argv[optind]);
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return -1;
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}
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fread(file_hdr.bType, 1, 2, in);
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if(file_hdr.bType[0] != 'B' || file_hdr.bType[1] != 'M') {
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fprintf(stderr, "%s: %s: File is not BMP.\n",
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argv[0], argv[optind]);
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fclose(in);
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return 0;
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}
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/* -------------------------------------------------------------------- */
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/* Read the BMPFileHeader. We need iOffBits value only */
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/* -------------------------------------------------------------------- */
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fseek(in, 10, SEEK_SET);
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fread(&file_hdr.iOffBits, 1, 4, in);
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#ifdef WORDS_BIGENDIAN
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TIFFSwabLong(&file_hdr.iOffBits);
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#endif
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stat(argv[optind], &instat);
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file_hdr.iSize = instat.st_size;
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/* -------------------------------------------------------------------- */
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/* Read the BMPInfoHeader. */
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/* -------------------------------------------------------------------- */
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fseek(in, BFH_SIZE, SEEK_SET);
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fread(&info_hdr.iSize, 1, 4, in);
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#ifdef WORDS_BIGENDIAN
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TIFFSwabLong(&info_hdr.iSize);
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#endif
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if (info_hdr.iSize == BIH_WIN4SIZE)
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bmp_type = BMPT_WIN4;
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else if (info_hdr.iSize == BIH_OS21SIZE)
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bmp_type = BMPT_OS21;
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else if (info_hdr.iSize == BIH_OS22SIZE || info_hdr.iSize == 16)
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bmp_type = BMPT_OS22;
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else
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bmp_type = BMPT_WIN5;
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if (bmp_type == BMPT_WIN4 || bmp_type == BMPT_WIN5 || bmp_type == BMPT_OS22) {
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fread(&info_hdr.iWidth, 1, 4, in);
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fread(&info_hdr.iHeight, 1, 4, in);
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fread(&info_hdr.iPlanes, 1, 2, in);
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fread(&info_hdr.iBitCount, 1, 2, in);
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fread(&info_hdr.iCompression, 1, 4, in);
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fread(&info_hdr.iSizeImage, 1, 4, in);
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fread(&info_hdr.iXPelsPerMeter, 1, 4, in);
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fread(&info_hdr.iYPelsPerMeter, 1, 4, in);
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fread(&info_hdr.iClrUsed, 1, 4, in);
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fread(&info_hdr.iClrImportant, 1, 4, in);
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#ifdef WORDS_BIGENDIAN
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TIFFSwabLong(&info_hdr.iWidth);
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TIFFSwabLong(&info_hdr.iHeight);
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TIFFSwabShort(&info_hdr.iPlanes);
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TIFFSwabShort(&info_hdr.iBitCount);
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TIFFSwabLong(&info_hdr.iCompression);
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TIFFSwabLong(&info_hdr.iSizeImage);
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TIFFSwabLong(&info_hdr.iXPelsPerMeter);
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TIFFSwabLong(&info_hdr.iYPelsPerMeter);
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TIFFSwabLong(&info_hdr.iClrUsed);
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TIFFSwabLong(&info_hdr.iClrImportant);
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#endif
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n_clr_elems = 4;
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}
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if (bmp_type == BMPT_OS22) {
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/*
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* FIXME: different info in different documents
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* regarding this!
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*/
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n_clr_elems = 3;
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}
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if (bmp_type == BMPT_OS21) {
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int16 iShort;
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fread(&iShort, 1, 2, in);
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#ifdef WORDS_BIGENDIAN
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TIFFSwabShort(&iShort);
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#endif
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info_hdr.iWidth = iShort;
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fread(&iShort, 1, 2, in);
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#ifdef WORDS_BIGENDIAN
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TIFFSwabShort(&iShort);
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#endif
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info_hdr.iHeight = iShort;
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fread(&iShort, 1, 2, in);
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#ifdef WORDS_BIGENDIAN
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TIFFSwabShort(&iShort);
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#endif
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info_hdr.iPlanes = iShort;
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fread(&iShort, 1, 2, in);
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#ifdef WORDS_BIGENDIAN
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TIFFSwabShort(&iShort);
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#endif
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info_hdr.iBitCount = iShort;
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info_hdr.iCompression = BMPC_RGB;
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n_clr_elems = 3;
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}
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if (info_hdr.iBitCount != 1 && info_hdr.iBitCount != 4 &&
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info_hdr.iBitCount != 8 && info_hdr.iBitCount != 16 &&
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info_hdr.iBitCount != 24 && info_hdr.iBitCount != 32) {
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fprintf(stderr,
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"%s: %s: Cannot process BMP file with bit count %d.\n",
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argv[0], argv[optind], info_hdr.iBitCount);
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fclose(in);
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return 0;
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}
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width = info_hdr.iWidth;
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length = (info_hdr.iHeight > 0) ? info_hdr.iHeight : -info_hdr.iHeight;
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switch (info_hdr.iBitCount)
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{
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case 1:
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case 4:
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case 8:
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nbands = 1;
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depth = info_hdr.iBitCount;
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photometric = PHOTOMETRIC_PALETTE;
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/* Allocate memory for colour table and read it. */
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if (info_hdr.iClrUsed)
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clr_tbl_size = (1 << depth < info_hdr.iClrUsed) ?
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1 << depth : info_hdr.iClrUsed;
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else
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clr_tbl_size = 1 << depth;
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clr_tbl = (unsigned char *)
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_TIFFmalloc(n_clr_elems * clr_tbl_size);
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fseek(in, BFH_SIZE + info_hdr.iSize, SEEK_SET);
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fread(clr_tbl, n_clr_elems, clr_tbl_size, in);
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red_tbl = (unsigned short*)
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_TIFFmalloc(1<<depth * sizeof(unsigned short));
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green_tbl = (unsigned short*)
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_TIFFmalloc(1<<depth * sizeof(unsigned short));
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blue_tbl = (unsigned short*)
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_TIFFmalloc(1<<depth * sizeof(unsigned short));
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for(clr = 0; clr < clr_tbl_size; clr++) {
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red_tbl[clr] = 257 * clr_tbl[clr*n_clr_elems+2];
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green_tbl[clr] = 257 * clr_tbl[clr*n_clr_elems+1];
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blue_tbl[clr] = 257 * clr_tbl[clr*n_clr_elems];
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}
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_TIFFfree(clr_tbl);
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break;
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case 16:
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case 24:
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nbands = 3;
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depth = info_hdr.iBitCount / nbands;
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photometric = PHOTOMETRIC_RGB;
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break;
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case 32:
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nbands = 3;
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depth = 8;
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photometric = PHOTOMETRIC_RGB;
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break;
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default:
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break;
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}
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/* -------------------------------------------------------------------- */
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/* Create output file. */
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/* -------------------------------------------------------------------- */
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if (outfilename == NULL)
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outfilename = argv[optind+1];
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out = TIFFOpen(outfilename, "w");
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if (out == NULL) {
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fprintf(stderr, "%s: %s: Cannot open file for output.\n",
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argv[0], outfilename);
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fclose(in);
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return -1;
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}
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TIFFSetField(out, TIFFTAG_IMAGEWIDTH, width);
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TIFFSetField(out, TIFFTAG_IMAGELENGTH, length);
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TIFFSetField(out, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT);
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TIFFSetField(out, TIFFTAG_SAMPLESPERPIXEL, nbands);
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TIFFSetField(out, TIFFTAG_BITSPERSAMPLE, depth);
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TIFFSetField(out, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
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TIFFSetField(out, TIFFTAG_PHOTOMETRIC, photometric);
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TIFFSetField(out, TIFFTAG_ROWSPERSTRIP,
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TIFFDefaultStripSize(out, rowsperstrip));
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if (red_tbl && green_tbl && blue_tbl)
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TIFFSetField(out, TIFFTAG_COLORMAP, red_tbl, green_tbl, blue_tbl);
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if (compression == (uint16) -1)
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compression = COMPRESSION_PACKBITS;
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TIFFSetField(out, TIFFTAG_COMPRESSION, compression);
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switch (compression) {
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case COMPRESSION_JPEG:
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if (photometric == PHOTOMETRIC_RGB
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&& jpegcolormode == JPEGCOLORMODE_RGB)
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photometric = PHOTOMETRIC_YCBCR;
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TIFFSetField(out, TIFFTAG_JPEGQUALITY, quality);
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TIFFSetField(out, TIFFTAG_JPEGCOLORMODE, jpegcolormode);
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break;
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case COMPRESSION_LZW:
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case COMPRESSION_DEFLATE:
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if (predictor != 0)
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TIFFSetField(out, TIFFTAG_PREDICTOR, predictor);
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break;
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}
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/* -------------------------------------------------------------------- */
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/* Read uncompressed image data. */
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/* -------------------------------------------------------------------- */
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if (info_hdr.iCompression == BMPC_RGB) {
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uint32 offset, size;
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char *scanbuf;
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size = ((width * info_hdr.iBitCount + 31) & ~31) / 8;
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scanbuf = (char *) _TIFFmalloc(size);
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for (row = 0; row < length; row++) {
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if (info_hdr.iHeight > 0)
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offset = file_hdr.iOffBits + (length - row - 1) * size;
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else
|
|
offset = file_hdr.iOffBits + row * size;
|
|
if (fseek(in, offset, SEEK_SET) == -1) {
|
|
fprintf(stderr,
|
|
"%s: %s: scanline %lu: Seek error.\n",
|
|
argv[0], argv[optind],
|
|
(unsigned long) row);
|
|
}
|
|
|
|
if (fread(scanbuf, size, 1, in) != 1) {
|
|
fprintf(stderr,
|
|
"%s: %s: scanline %lu: Read error.\n",
|
|
argv[0], argv[optind],
|
|
(unsigned long) row);
|
|
}
|
|
|
|
rearrangePixels(scanbuf, width, info_hdr.iBitCount);
|
|
|
|
if (TIFFWriteScanline(out, scanbuf, row, 0) < 0) {
|
|
fprintf(stderr,
|
|
"%s: %s: scanline %lu: Write error.\n",
|
|
argv[0], outfilename,
|
|
(unsigned long) row);
|
|
}
|
|
}
|
|
|
|
_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 );
|
|
uncomprbuf = (unsigned char *) _TIFFmalloc( uncompr_size );
|
|
|
|
fseek(in, file_hdr.iOffBits, SEEK_SET);
|
|
fread(comprbuf, 1, compr_size, in);
|
|
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) {
|
|
fprintf(stderr,
|
|
"%s: %s: scanline %lu: Write error.\n",
|
|
argv[0], outfilename,
|
|
(unsigned long) row);
|
|
}
|
|
}
|
|
|
|
_TIFFfree(uncomprbuf);
|
|
}
|
|
|
|
if (red_tbl && green_tbl && blue_tbl) {
|
|
_TIFFfree(red_tbl);
|
|
_TIFFfree(green_tbl);
|
|
_TIFFfree(blue_tbl);
|
|
}
|
|
|
|
fclose(in);
|
|
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(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 --- tool for converting Windows BMP files in 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);
|
|
}
|