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jedioutcast/utils/roq2/libim/impbm.c
James Monroe b2f9cf6f08 Jedi Outcast v056
2013-04-04 13:07:40 -05:00

2383 lines
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/**
** $Header: /roq/libim/impbm.c 1 11/02/99 4:38p Zaphod $
** Copyright (c) 1989-1995 San Diego Supercomputer Center (SDSC)
** a division of General Atomics, San Diego, California, USA
**
** Users and possessors of this source code are hereby granted a
** nonexclusive, royalty-free copyright and design patent license to
** use this code in individual software. License is not granted for
** commercial resale, in whole or in part, without prior written
** permission from SDSC. This source is provided "AS IS" without express
** or implied warranty of any kind.
**
** For further information contact:
** E-Mail: info@sds.sdsc.edu
**
** Surface Mail: Information Center
** San Diego Supercomputer Center
** P.O. Box 85608
** San Diego, CA 92138-5608
** (619) 534-5000
**/
#define HEADER " $Header: /roq/libim/impbm.c 1 11/02/99 4:38p Zaphod $"
/**
** FILE
** impbm.c - I/O for Jef Poskanzer's PBM file formats
**
** PROJECT
** libim - SDSC image manipulation library
**
** DESCRIPTION
** impbm.c contains routines to read and write the various PBM suite
** image files for the image manipulation library. Raster data read
** in is stored in a VFB. Raster data written out is taken from a
** tag table.
**
** PUBLIC CONTENTS
** d =defined constant
** f =function
** m =defined macro
** t =typedef/struct/union
** v =variable
** ? =other
**
** none
**
** PRIVATE CONTENTS
**
** imPbmRead f read a PBM file
**
** imPbmWrite1 f write a 1-bit ASCII PBM file
** imPbmWrite8 f write an 8-bit ASCII PGM file
** imPbmWriteRGB f write an RGB ASCII PPM file
** imRpbmWrite1 f write an 1-bit raw PBM file
** imRpbmWrite8 f write an 8-bit raw PGM file
** imRpbmWriteRGB f write an RGB raw PPM file
**
** readAsciiInt f read in an ASCII string integer
**
** HISTORY
** $Log: /roq/libim/impbm.c $
*
* 1 11/02/99 4:38p Zaphod
** Revision 1.15 1995/06/29 00:28:04 bduggan
** updated copyright year
**
** Revision 1.14 1995/06/15 20:34:11 bduggan
** added casts for strlen
**
** Revision 1.13 1995/05/17 23:46:16 bduggan
** Merged everything into one format, with an ascii compression option
**
** Revision 1.12 1995/04/03 21:32:07 bduggan
** took out #ifdef NEWMAGIC
**
** Revision 1.11 1995/01/10 23:35:34 bduggan
** uncapitlized i's in local functions
** made read/write routines static
**
** Revision 1.10 1994/10/03 11:30:19 nadeau
** Updated to ANSI C and C++ compatibility.
** Removed all use of register keyword.
** Minimized use of custom SDSC types (e.g., uchar vs. unsigned char)
** Changed all float arguments to double.
** Added forward declarations.
** Added misc. casts to passify SGI and DEC compilers.
** Changed all macros and defined constants to have names
** starting with IM.
** Rearranged magic number structures for format handlers.
** Made format handler routines static (i.e., local to file).
** Updated comments, adding format descriptions and references.
** Updated indenting on some code.
** Updated copyright message.
**
** Revision 1.10 1994/10/03 11:30:19 nadeau
** Updated to ANSI C and C++ compatibility.
** Removed all use of register keyword.
** Minimized use of custom SDSC types (e.g., uchar vs. unsigned char)
** Changed all float arguments to double.
** Added forward declarations.
** Added misc. casts to passify SGI and DEC compilers.
** Changed all macros and defined constants to have names
** starting with IM.
** Rearranged magic number structures for format handlers.
** Made format handler routines static (i.e., local to file).
** Updated comments, adding format descriptions and references.
** Updated indenting on some code.
** Updated copyright message.
**
** Revision 1.9 92/12/03 01:50:12 nadeau
** Corrected info messages.
**
** Revision 1.8 92/11/24 11:51:57 groening
** Removed use of IMINFOMSG and added file format table
** declarations and initializations.
**
** Revision 1.7 92/10/19 14:17:09 groening
** fixed bug on read mono
** added ImINfo statements
**
** Revision 1.6 92/08/31 17:29:10 vle
** Updated copyright notice.
**
** Revision 1.5 92/04/09 09:32:36 groening
** To make the compiler happy added extern statements.
**
** Revision 1.4 92/04/08 10:48:30 nadeau
** Fixed SGI ANSI cc complaints about passing unsigned char arrays
** as args to functions expecting char arrays. Big deal.
**
** Revision 1.3 91/10/03 09:14:47 nadeau
** Fixed #includes. Fixed monochrome write bug that
** inverted meaning of black and white.
**
** Revision 1.2 91/03/08 14:29:15 nadeau
** Nearly a total rewrite. Ran it all through 'indent', the UNIX
** C beautifier, just to make it readable. Rearranged. Restructured.
** Rewrote. Added comments. Removed meaningless ones. Added code
** to work with the latest enhancements to ImFileRead and ImFileWrite.
** Basically a total rewrite.
**
** Revision 1.1 91/01/18 15:40:34 doeringd
** Initial revision
**/
#include <ctype.h>
#include "iminternal.h"
/**
** FORMAT
** PBM - Jef Poskanzer's PBM file formats
**
** AKA
** rpbm,pgm,rpgm,ppm,rppm
**
** FORMAT REFERENCES
** Graphics File Formats, David C. Kay, John R. Levine
**
** CODE CREDITS
** Custom development, Donald Doering, San Diego Supercomputer Center, 1991.
** Custom development, Dave Nadeau, San Diego Supercomputer Center, 1991.
**
** DESCRIPTION
** The PBM suite really defines six (6) file formats:
**
** PBM ASCII Monochrome bitmap
** PGM ASCII Grayscale pixel map
** PPM ASCII Color pixel map
**
** RPBM Raw Monochrome bitmap
** RPGM Raw Grayscale pixel map
** RPPM Raw Color pixel map
**
** The ASCII formats store the image as ASCII, human-readable files,
** while the raw formats store them as raw binary files. Since the
** binary files are still only byte-based (8-bit grayscale, 8-bit per
** channel RGB), they are still portable (but a lot smaller and faster).
**
** All six formats start with a file header of the form:
**
** unsigned char magic1;
** unsigned char magic2;
** unsigned int width, height;
**
** magic1 is always a 'P'.
**
** magic2 selects which of the six formats:
**
** '1' PBM
** '2' PGM
** '3' PPM
** '4' RPBM
** '5' RPGM
** '6' RPPM
**
** width and height are the width and height of the image in pixels.
**
** For formats other than PBM and RPBM, the header also contains:
**
** unsigned int maxIntensity;
**
** maxIntensity is the highest value allowed for one channel of the
** image. For instance, for 8-bit grayscale, maxIntensity is 255.
** For 24-bit RGB images, maxIntensity is also 255 (8-bit channels).
**
** When reading images, incomming pixel values are scaled from the
** range 0-maxIntensity, up or down to the VFB 8-bit range 0-255.
**
** For monochrome PBM and RPBM files, 0 is white and 1 is black. This
** is the opposite of the image library's conventions. However, PGM,
** RPGM, PPM, and RPPM files all follow the convention that 0 is black,
** and 1 is brighter than black (255 is full intensity).
**
** NOTE: the header is always ASCII, including maxIntensity.
**
** ASCII FORMATS
** For the three ASCII formats, the rest of the file is filled with
** ASCII integer values separated by white space. Carriage returns,
** form feeds, spaces, and tabs are ignored. Comments starting with
** a '#' and extending to the end of the line are ignored.
**
** When we write ASCII formats, to make the format more readable,
** carriage returns are inserted after every 70 characters or so.
**
** BINARY FORMATS
** For the three "raw" binary formats, the rest of the file is filled
** with 8-bit values.
**/
/*
* PBM - ASCII bitmap (monochrome)
* PGM - ASCII gray (grayscale)
* PNM - any ASCII format
* PPM - ASCII pixel (RGB color)
* RPBM - Raw bitmap (monochrome)
* RPGM - Raw gray (grayscale)
* RPNM - any Raw format
* RPPM - Raw pixel (RGB color)
*
* All 8 formats share the same read call. Some share the same write calls.
*/
#ifdef __STDC__
static int imPbmRead(int ioType, int fd, FILE *fp, TagTable *flagsTable, TagTable *tagTable);
static int imPbmWrite1( ImFileFormatWriteMap * pMap, int ioType, int fd, FILE *fp, TagTable *flagsTable, TagTable *tagTable );
static int imPbmWrite8( ImFileFormatWriteMap * pMap, int ioType, int fd, FILE *fp, TagTable *flagsTable, TagTable *tagTable );
static int imPbmWriteRGB( ImFileFormatWriteMap * pMap, int ioType, int fd, FILE *fp, TagTable *flagsTable, TagTable *tagTable );
static int imRpbmWrite1( ImFileFormatWriteMap * pMap, int ioType, int fd, FILE *fp, TagTable *flagsTable, TagTable *tagTable );
static int imRpbmWrite8( ImFileFormatWriteMap * pMap, int ioType, int fd, FILE *fp, TagTable *flagsTable, TagTable *tagTable );
static int imRpbmWriteRGB( ImFileFormatWriteMap * pMap, int ioType, int fd, FILE *fp, TagTable *flagsTable, TagTable *tagTable );
#else
static int imPbmRead( );
static int imPbmWrite1( ), imPbmWrite8( ), imPbmWriteRGB( );
static int imRpbmWrite1( ), imRpbmWrite8( ), imRpbmWriteRGB( );
#endif
/*
* Magic constants
*/
#define IMPBM_MAGIC1 'P'
#define IMPBM_MAGIC2 '1'
#define IMPGM_MAGIC2 '2'
#define IMPPM_MAGIC2 '3'
#define IMRPBM_MAGIC2 '4'
#define IMRPGM_MAGIC2 '5'
#define IMRPPM_MAGIC2 '6'
static char *imPbmNames[ ] = { "pbm", "rpbm", "pgm", "rpgm", "pnm", "rpnm", "ppm", "rppm", NULL };
static unsigned char imPbmMagicNumber[ ] = { IMPBM_MAGIC1, IMPBM_MAGIC2 };
static unsigned char imRpbmMagicNumber[ ] = { IMPBM_MAGIC1, IMRPBM_MAGIC2 };
static unsigned char imPgmMagicNumber[ ] = { IMPBM_MAGIC1, IMPGM_MAGIC2 };
static unsigned char imRpgmMagicNumber[ ] = { IMPBM_MAGIC1, IMRPGM_MAGIC2 };
static unsigned char imPpmMagicNumber[ ] = { IMPBM_MAGIC1, IMPPM_MAGIC2 };
static unsigned char imRppmMagicNumber[ ] = { IMPBM_MAGIC1, IMRPPM_MAGIC2 };
static ImFileFormatReadMap imPbmReadMap[ ] =
{
/* in out */
/* type,ch,dep, attr. VFB type attr. */
{ IN,1,1, 0, IMVFBMONO, 0 },
{ IN,1,8, 0, IMVFBINDEX8, 0 },
{ RGB,3,8, 0, IMVFBRGB, 0 },
{ IN,1,1, ASC, IMVFBMONO, 0 },
{ IN,1,8, ASC, IMVFBINDEX8, 0 },
{ RGB,3,8, ASC, IMVFBRGB, 0 },
{ -1, 0, -1, 0 },
};
static ImFileFormatWriteMap imPbmWriteMap[ ] =
{
/* in out */
/* VFB type, attr., type,ch,dep, attr., func */
{ IMVFBMONO, 0, IN,1,1, ASC, imPbmWrite1 },
{ IMVFBMONO, 0, IN,1,1, 0, imRpbmWrite1 },
{ IMVFBINDEX8, 0, IN,1,8, ASC, imPbmWrite8 },
{ IMVFBINDEX8, 0, IN,1,8, 0, imRpbmWrite8 },
{ IMVFBRGB, 0, RGB,3,8, ASC, imPbmWriteRGB },
{ IMVFBRGB, 0, RGB,3,8, 0, imRpbmWriteRGB },
{ -1, 0, -1, 0, NULL },
};
static ImFileMagic imFilePbmMagic []=
{
{0, 2, imPbmMagicNumber },
{0, 2, imRpbmMagicNumber },
{0, 2, imPgmMagicNumber },
{0, 2, imRpgmMagicNumber },
{0, 2, imPpmMagicNumber },
{0, 2, imRppmMagicNumber },
{ 0, 0, NULL },
};
ImFileFormat ImFilePbmFormat =
{
imPbmNames, "PBM Portable Bit Map file",
"Jef Poskanzer",
"1-bit monochrome, 8-bit grayscale, 24-bit rgb, ascii encoded or binary",
"1-bit monochrome PBM images.",
imFilePbmMagic,
IMNOMULTI, IMPIPE,
IMNOMULTI, IMPIPE,
imPbmRead, imPbmReadMap, imPbmWriteMap
};
#ifdef __STDC__
static int skipEOL( int ioTyne, int fd, FILE *fp );
static int readAsciiInt( int ioType, int fd, FILE *fp, int *value );
#else
static int skipEOL( );
static int readAsciiInt();
#endif
#define IMWrite(ioType,fd,fp,buffer,size) \
((ioType&IMFILEIOFD) ? \
write( fd, buffer, size ) \
: \
fwrite( buffer, 1, size, fp ))
/*
* FUNCTION
* imPbmRead - read a PBM file
*
* DESCRIPTION
* The header is read in, followed by the image pixels in either
* ASCII or raw format.
*/
static int /* Returns status */
#ifdef __STDC__
imPbmRead(int ioType, int fd, FILE *fp, TagTable *flagsTable, TagTable *tagTable)
#else
imPbmRead(ioType, fd, fp, flagsTable, tagTable)
int ioType; /* I/O type */
int fd; /* Input file descriptor */
FILE *fp; /* Input file buffer pointer */
TagTable *flagsTable; /* Input parameter/flags */
TagTable *tagTable; /* Tag table to add to */
#endif
{
ImVfbPtr pPixel; /* VFB pixel pointer */
unsigned char *pBuffer; /* Buffer pointer */
int bitShift; /* Shift amount for expanding Mono*/
int width, height; /* Image size */
int fields; /* VFB fields */
int maxIntensity; /* Maximum channel intensity */
float colorScale; /* Intensity scaling */
unsigned char magic[2]; /* Magic number */
unsigned char byte; /* Byte holder */
int hue; /* Incomming channel value */
ImVfb *vfb; /* New VFB */
unsigned char *buffer; /* Incomming byte buffer */
int x, y; /* VFB location */
char message[100]; /* ImInfo message */
/*
* Get the magic number
*/
BinByteOrder( BINMBF );
ImInfo ("Byte Order","Most Significant Byte First");
if ( ImBinRead( ioType, fd, fp, magic, UCHAR, 1, 2 ) == -1 )
ImReturnBinError( );
if ( magic[0] != IMPBM_MAGIC1 )
{
ImErrNo = IMEMAGIC;
ImErrorFatal( ImQError( ), -1, ImErrNo );
}
switch ( magic[1] )
{
case IMPBM_MAGIC2:
case IMRPBM_MAGIC2:
fields = IMVFBMONO;
break;
case IMPGM_MAGIC2:
case IMRPGM_MAGIC2:
fields = IMVFBINDEX8;
break;
case IMPPM_MAGIC2:
case IMRPPM_MAGIC2:
fields = IMVFBRGB;
break;
default:
ImErrNo = IMEMAGIC;
ImErrorFatal( ImQError( ), -1, ImErrNo );
}
/*
* Read image size.
*/
if ( readAsciiInt( ioType, fd, fp, &width ) == -1)
return ( -1 ); /* Error already handled */
if ( readAsciiInt( ioType, fd, fp, &height ) == -1)
return ( -1 ); /* Error already handled */
sprintf (message, "%d x %d",width, height);
ImInfo ("Resolution",message);
switch ( magic[1] )
{
case IMPBM_MAGIC2:
ImInfo ("Type","1-bit Monochrome");
ImInfo ("Compression", "Ascii");
break;
case IMRPBM_MAGIC2:
ImInfo ("Type","1-bit Monochrome");
ImInfo ("Compression", "none");
break;
case IMPGM_MAGIC2:
ImInfo ("Type","8-bit Grayscale");
ImInfo ("Compression", "Ascii");
break;
case IMRPGM_MAGIC2:
ImInfo ("Type","8-bit Grayscale");
ImInfo ("Compression", "none");
break;
case IMPPM_MAGIC2:
ImInfo ("Type","24-bit RGB");
ImInfo ("Compression", "Ascii");
break;
case IMRPPM_MAGIC2:
ImInfo ("Type","24-bit RGB");
ImInfo ("Compression", "none");
break;
}
/*
* Except for PBM and RPBM formats, read in the maximum channel
* value 'maxIntensity'.
*
* Compute how to scale color values from their incomming value
* range of 0-maxIntensity, to our range of 0-255 (8-bit indexes
* and RGB components).
*/
maxIntensity = 0;
if ( magic[1] != IMPBM_MAGIC2 && magic[1] != IMRPBM_MAGIC2 )
{
if ( readAsciiInt( ioType, fd, fp, &maxIntensity ) == -1 )
return ( -1 ); /* Error already handled */
colorScale = 255.0 / (float) maxIntensity;
}
skipEOL( ioType, fd, fp );
/*
* Allocate a VFB of the required size.
*/
if ((vfb = ImVfbAlloc( width, height, fields )) == IMVFBNULL)
{
ImErrorFatal( ImQError( ), -1, ImErrNo );
}
/*
* Read in the image, depending upon how it is stored.
*/
switch ( magic[1] )
{
case IMPPM_MAGIC2: /* ASCII Color */
pPixel = ImVfbQFirst( vfb );
for (y = 0; y < height; y++)
{
for ( x = 0; x < width; x++)
{
if ( readAsciiInt( ioType, fd, fp, &hue ) == -1)
return (-1);
ImVfbSRed( vfb, pPixel, colorScale * hue );
if ( readAsciiInt( ioType, fd, fp, &hue ) == -1)
return (-1);
ImVfbSGreen( vfb, pPixel, colorScale * hue );
if ( readAsciiInt( ioType, fd, fp, &hue ) == -1)
return (-1);
ImVfbSBlue( vfb, pPixel, colorScale * hue );
ImVfbSInc( vfb, pPixel );
}
}
break;
case IMRPPM_MAGIC2: /* Raw Color */
/* Skip carriage return. */
ImMalloc( buffer, unsigned char *, width * 3 );
pPixel = ImVfbQFirst( vfb );
for (y = 0; y < height; y++)
{
if ( ImBinRead( ioType, fd, fp, buffer, UCHAR, 1, width * 3 ) == -1 )
{
free( (char *)buffer );
ImReturnBinError( );
}
pBuffer = buffer;
for ( x = 0; x < width; x++ )
{
ImVfbSRed( vfb, pPixel, colorScale * *pBuffer++ );
ImVfbSGreen( vfb, pPixel, colorScale * *pBuffer++ );
ImVfbSBlue( vfb, pPixel, colorScale * *pBuffer++ );
ImVfbSInc( vfb, pPixel );
}
}
free( (char *) buffer );
break;
case IMPGM_MAGIC2: /* ASCII grayscale */
pPixel = ImVfbQFirst( vfb );
for (y = 0; y < height; y++)
{
for (x = 0; x < width; x++ )
{
if ( readAsciiInt( ioType, fd, fp, &hue ) == -1)
return (-1);
ImVfbSIndex8( vfb, pPixel, colorScale * hue );
ImVfbSInc( vfb, pPixel );
}
}
break;
case IMRPGM_MAGIC2: /* Raw grayscale */
/* Skip carriage return. */
ImMalloc( buffer, unsigned char *, width );
pPixel = ImVfbQFirst( vfb );
for (y = 0; y < height; y++)
{
if ( ImBinRead( ioType, fd, fp, buffer, UCHAR, 1, width ) == -1 )
{
free( (char *)buffer );
ImReturnBinError( );
}
pBuffer = buffer;
for ( x = 0; x < width; x++ )
{
ImVfbSIndex8( vfb, pPixel, colorScale * *pBuffer++ );
ImVfbSInc( vfb, pPixel );
}
}
free( (char *) buffer );
break;
case IMPBM_MAGIC2: /* ASCII bitmap (mono) */
pPixel = ImVfbQFirst( vfb );
for (y = 0; y < height; y++)
{
for (x = 0; x < width; x++ )
{
if ( readAsciiInt( ioType, fd, fp, &hue ) == -1)
return (-1);
/*
* hue = 0 (white) maps to VFB 1 (white).
* hue = 1 (black) maps to VFB 0 (black).
*/
ImVfbSMono( vfb, pPixel, (~hue) & 0x1 );
ImVfbSInc( vfb, pPixel );
}
}
break;
case IMRPBM_MAGIC2: /* Raw bitmap (mono) */
/* Skip carriage return. */
ImMalloc( buffer, unsigned char *, (width + 7) / 8 );
pPixel = ImVfbQFirst( vfb );
for (y = 0; y < height; y++)
{
bitShift = -1;
if ( ImBinRead( ioType, fd, fp, buffer, UCHAR, 1, (width + 7) / 8 ) == -1 )
{
free( (char *)buffer );
ImReturnBinError( );
}
pBuffer = buffer;
for ( x = 0; x < width; x++ )
{
if (bitShift == -1)
{
byte = ~(*pBuffer++);
bitShift = 7;
}
/*
* hue = 0 (white) maps to VFB 1 (white).
* hue = 1 (black) maps to VFB 0 (black).
*/
ImVfbSMono( vfb, pPixel,
!((byte >> bitShift--)& 0x1) );
ImVfbSInc( vfb, pPixel );
}
}
free( (char *) buffer );
break;
}
/*
* Add the VFB to the tagTable.
*/
TagTableAppend( tagTable, TagEntryAlloc( "image vfb", POINTER, &vfb ) );
return ( 1 );
}
/*
* FUNCTION
* skipEOL - skip to end of line
* readAsciiInt - read in an ASCII string integer
*
* DESCRIPTION
* White space and comments are skipped up to the first digit of a number.
* The number is read in and returned. If a read problem occurs, a -1
* is returned as the function value. Otherwise 0 is returned.
*/
static int /* Returns status */
#ifdef __STDC__
skipEOL( int ioType, int fd, FILE *fp )
#else
skipEOL( ioType, fd, fp )
int ioType; /* I/O type */
int fd; /* File descriptor to use */
FILE *fp; /* File pointer to use */
#endif
{
int ich; /* Input character (as integer) */
unsigned char ch; /* Input character */
ch = '\0';
if ( ioType & IMFILEIOFD )
{
while ( ch != '\n' )
{
if ( read( fd, &ch, 1 ) <= 0 )
{
ImErrNo = IMESYNTAX;
ImErrorFatal( ImQError( ), -1, ImErrNo );
}
}
return ( 0 );
}
while ( (ich = getc( fp )) != '\n' && ich != EOF )
;
if ( ich == EOF )
{
ImErrNo = IMESYNTAX;
ImErrorFatal( ImQError( ), -1, ImErrNo );
}
return ( 0 );
}
static int /* Returns status */
#ifdef __STDC__
readAsciiInt( int ioType, int fd, FILE *fp, int *value )
#else
readAsciiInt( ioType, fd, fp, value )
int ioType; /* I/O type */
int fd; /* File descriptor to use */
FILE *fp; /* File pointer to use */
int *value; /* Returned integer value */
#endif
{
int ich; /* Input character (as integer) */
unsigned char ch; /* Input character */
if ( ioType & IMFILEIOFD )
{
/* Skip white space and comments that start with a '#' */
do
{
if ( read( fd, &ch, 1 ) <= 0 )
{
ImErrNo = IMESYNTAX;
ImErrorFatal( ImQError( ), -1, ImErrNo );
}
if ( ch == '#' )
{
if ( skipEOL( ioType, fd, fp ) == -1 )
return ( -1 );
ch = '\n';
}
} while ( isspace( ch ) );
/* Read in and assemble an integer. */
*value = 0;
while ( isdigit( ch ) )
{
*value = *value * 10 + (ch - '0');
if ( read( fd, &ch, 1 ) <= 0 )
{
ImErrNo = IMESYNTAX;
ImErrorFatal( ImQError( ), -1, ImErrNo );
}
}
return ( 0 );
}
/*
* Skip white space and comments starting with '#'. Read in
* a single integer.
*/
while ( (ich = getc( fp )) == '#' || isspace( ich ) )
{
if ( ich == '#' )
if ( skipEOL( ioType, fd, fp ) == -1 )
return ( -1 );
}
if ( ich == EOF )
{
ImErrNo = IMESYNTAX;
ImErrorFatal( ImQError( ), -1, ImErrNo );
}
ungetc( ich, fp );
if ( fscanf( fp, "%d", value ) != 1 )
{
ImErrNo = IMESYNTAX;
ImErrorFatal( ImQError( ), -1, ImErrNo );
}
return ( 0 );
}
/*
* FUNCTION
* imPbmWrite1 - write a 1-bit ASCII PBM file
* imPbmWrite8 - write an 8-bit ASCII PGM file
* imPbmWriteRGB - write an RGB ASCII PPM file
*
* DESCRIPTION
* 1-bit: The image is written out in ASCII as a series of 1-bit values
* each in the form: "i ". To make the PBM file more readable,
* carriage returns are added every 70 characters or so.
*
* 8-bit: The image is written out in ASCII as a series of 8-bit index
* values, each in the form: "iii ". To make the PGM file more readable,
* carriage returns are added every 70 characters or so.
*
* RGB: The image is written out in ASCII as a series of RGB values, each
* in the form: "rrr ggg bbb ". To make the PPM file more readable,
* carriage returns are added every 70 characters or so (after the nearest
* complete tripplet).
*/
static int
#ifdef __STDC__
imPbmWrite1(ImFileFormatWriteMap * pMap, int ioType, int fd, FILE *fp, TagTable *flagsTable, TagTable *tagTable )
#else
imPbmWrite1( pMap, ioType, fd, fp, flagsTable, tagTable )
ImFileFormatWriteMap *pMap; /* Write map entry to adhear to */
int ioType; /* I/O type flag */
int fd; /* Unbuffered file descriptor */
FILE *fp; /* Buffered file pointer */
TagTable *flagsTable; /* Max color value flag */
TagTable *tagTable; /* Tag list to read from */
#endif
{
int x, y; /* Pixel location counters */
ImVfbPtr pPixel; /* Current pixel */
ImVfb *vfb; /* Image to output */
int width; /* Image width */
int height; /* Image height */
unsigned char buffer[200]; /* Line buffer */
unsigned char *pBuffer; /* Current location in buffer */
unsigned char *pBufferStop; /* Where to stop & flush in buffer*/
char message[100]; /* ImInfo message */
/*
* Get the VFB and its attributes. Write the PBM header.
*/
TagEntryQValue( TagTableQDirect( tagTable, "image vfb", 0 ), &vfb );
width = ImVfbQWidth( vfb );
height = ImVfbQHeight( vfb );
sprintf( (char *)buffer, "%c%c\n%d %d\n", IMPBM_MAGIC1, IMPBM_MAGIC2,
width, height );
IMWrite( ioType, fd, fp, buffer, strlen( (char*)buffer ) );
ImInfo ("Byte Order","Most Significant Byte First");
ImInfo ("Type","1-bit Monochrome");
sprintf (message, "%d x %d",width, height);
ImInfo ("Resolution",message);
ImInfo ("Compression", "Ascii");
pPixel = ImVfbQFirst( vfb );
pBufferStop = buffer + 70; /* Flush soon after 70 chars */
pBuffer = buffer;
for ( y = 0; y < height; y++ )
{
for ( x = 0; x < width; x++ )
{
if ( pBuffer >= pBufferStop )
{
*pBuffer = '\n';
IMWrite( ioType, fd, fp, buffer,pBuffer-buffer+1);
pBuffer = buffer;
}
sprintf( (char *)pBuffer, "%1d ",
(~ImVfbQMono( vfb, pPixel )) & 0x1 );
pBuffer += 2;
ImVfbSInc( vfb, pPixel );
}
if ( pBuffer != buffer )
{
*pBuffer = '\n';
IMWrite( ioType, fd, fp, buffer,pBuffer-buffer+1);
pBuffer = buffer;
}
}
return ( 1 );
}
static int
#ifdef __STDC__
imPbmWrite8(ImFileFormatWriteMap * pMap, int ioType, int fd, FILE *fp, TagTable *flagsTable, TagTable *tagTable )
#else
imPbmWrite8( pMap, ioType, fd, fp, flagsTable, tagTable )
ImFileFormatWriteMap *pMap; /* Write map entry to adhear to */
int ioType; /* I/O type flag */
int fd; /* Unbuffered file descriptor */
FILE *fp; /* Buffered file pointer */
TagTable *flagsTable; /* Max color value flag */
TagTable *tagTable; /* Tag list to read from */
#endif
{
int x, y; /* Pixel location counters */
ImVfbPtr pPixel; /* Current pixel */
ImVfb *vfb; /* Image to output */
int width; /* Image width */
int height; /* Image height */
unsigned char buffer[200]; /* Line buffer */
unsigned char *pBuffer; /* Current location in buffer */
unsigned char *pBufferStop; /* Where to stop & flush in buffer*/
char message[100]; /* ImInfo message */
/*
* Get the VFB and its attributes. Write the PGM header.
*/
TagEntryQValue( TagTableQDirect( tagTable, "image vfb", 0 ), &vfb );
width = ImVfbQWidth( vfb );
height = ImVfbQHeight( vfb );
sprintf( (char *)buffer, "%c%c\n%d %d\n255\n", IMPBM_MAGIC1, IMPGM_MAGIC2,
width, height );
IMWrite( ioType, fd, fp, buffer, strlen((char*) buffer ) );
ImInfo ("Byte Order","Most Significant Byte First");
ImInfo ("Type","8-bit Grayscale");
sprintf (message, "%d x %d",width, height);
ImInfo ("Resolution",message);
ImInfo ("Compression", "Ascii");
pPixel = ImVfbQFirst( vfb );
pBufferStop = buffer + 68; /* Flush soon after 68 chars */
pBuffer = buffer;
for ( y = 0; y < height; y++ )
{
for ( x = 0; x < width; x++ )
{
if ( pBuffer >= pBufferStop )
{
*pBuffer = '\n';
IMWrite( ioType, fd, fp, buffer,pBuffer-buffer+1);
pBuffer = buffer;
}
sprintf( (char *)pBuffer, "%03d ",
(ImVfbQIndex8( vfb, pPixel ) & 0xFF) );
pBuffer += 4;
ImVfbSInc( vfb, pPixel );
}
if ( pBuffer != buffer )
{
*pBuffer = '\n';
IMWrite( ioType, fd, fp, buffer,pBuffer-buffer+1);
pBuffer = buffer;
}
}
return ( 1 );
}
static int
#ifdef __STDC__
imPbmWriteRGB(ImFileFormatWriteMap * pMap, int ioType, int fd, FILE *fp, TagTable *flagsTable, TagTable *tagTable )
#else
imPbmWriteRGB( pMap, ioType, fd, fp, flagsTable, tagTable )
ImFileFormatWriteMap *pMap; /* Write map entry to adhear to */
int ioType; /* I/O type flag */
int fd; /* Unbuffered file descriptor */
FILE *fp; /* Buffered file pointer */
TagTable *flagsTable; /* Max color value flag */
TagTable *tagTable; /* Tag list to read from */
#endif
{
int x, y; /* Pixel location counters */
ImVfbPtr pPixel; /* Current pixel */
ImVfb *vfb; /* Image to output */
int width; /* Image width */
int height; /* Image height */
unsigned char buffer[200]; /* Line buffer */
unsigned char *pBuffer; /* Current location in buffer */
unsigned char *pBufferStop; /* Where to stop & flush in buffer*/
char message[100]; /* ImInfo message */
/*
* Get the VFB and its attributes. Write the PPM header.
*/
TagEntryQValue( TagTableQDirect( tagTable, "image vfb", 0 ), &vfb );
width = ImVfbQWidth( vfb );
height = ImVfbQHeight( vfb );
sprintf( (char *)buffer, "%c%c\n%d %d\n255\n", IMPBM_MAGIC1, IMPPM_MAGIC2,
width, height );
IMWrite( ioType, fd, fp, buffer, strlen((char*) buffer ) );
ImInfo ("Byte Order","Most Significant Byte First");
ImInfo ("Type","24-bit RGB");
sprintf (message, "%d x %d",width, height);
ImInfo ("Resolution",message);
ImInfo ("Compression", "Ascii");
pPixel = ImVfbQFirst( vfb );
pBufferStop = buffer + 65; /* Flush soon after 65 chars */
pBuffer = buffer;
for ( y = 0; y < height; y++ )
{
for ( x = 0; x < width; x++ )
{
if ( pBuffer >= pBufferStop )
{
*pBuffer = '\n';
IMWrite( ioType, fd, fp, buffer,pBuffer-buffer+1);
pBuffer = buffer;
}
sprintf( (char *)pBuffer, "%03d %03d %03d ",
(ImVfbQRed( vfb, pPixel ) & 0xFF),
(ImVfbQGreen( vfb, pPixel ) & 0xFF),
(ImVfbQBlue( vfb, pPixel ) & 0xFF) );
pBuffer += 13;
ImVfbSInc( vfb, pPixel );
}
if ( pBuffer != buffer )
{
*pBuffer = '\n';
IMWrite( ioType, fd, fp, buffer,pBuffer-buffer+1);
pBuffer = buffer;
}
}
return ( 1 );
}
/*
* FUNCTION
* imRpbmWrite1 - write an 1-bit raw PBM file
* imRpbmWrite8 - write an 8-bit raw PGM file
* imRpbmWriteRGB - write an RGB raw PPM file
*
* DESCRIPTION
* 1-bit: The image is written out in binary as a series of 8-bit values,
* each one constructed from 8 1-bit mono values.
*
* 8-bit: The image is written out in binary as a series of 8-bit index
* values.
*
* RGB: The image is written out in binary as a series of RGB values.
*/
static int
#ifdef __STDC__
imRpbmWrite1(ImFileFormatWriteMap * pMap, int ioType, int fd, FILE *fp, TagTable *flagsTable, TagTable *tagTable )
#else
imRpbmWrite1( pMap, ioType, fd, fp, flagsTable, tagTable )
ImFileFormatWriteMap *pMap; /* Write map entry to adhear to */
int ioType; /* I/O type flag */
int fd; /* Unbuffered file descriptor */
FILE *fp; /* Buffered file pointer */
TagTable *flagsTable; /* Max color value flag */
TagTable *tagTable; /* Tag list to read from */
#endif
{
int x, y; /* Pixel location counters */
ImVfbPtr pPixel; /* Current pixel */
ImVfb *vfb; /* Image to output */
int width; /* Image width */
int height; /* Image height */
unsigned char buf[200]; /* Temp buffer */
unsigned char *buffer; /* Line buffer */
unsigned char *pBuffer; /* Current location in buffer */
int shift; /* How far to shift */
int byte; /* Byte being built up */
char message[100]; /* ImInfo message */
/*
* Get the VFB and its attributes. Write the PBM header.
*/
TagEntryQValue( TagTableQDirect( tagTable, "image vfb", 0 ), &vfb );
width = ImVfbQWidth( vfb );
height = ImVfbQHeight( vfb );
sprintf( (char *)buf, "%c%c\n%d %d\n", IMPBM_MAGIC1, IMRPBM_MAGIC2,
width, height );
IMWrite( ioType, fd, fp, buf, strlen((char*) buf ) );
ImInfo ("Byte Order","Most Significant Byte First");
ImInfo ("Type","1-bit Monochrome");
sprintf (message, "%d x %d",width, height);
ImInfo ("Resolution",message);
ImInfo ("Compression", "none");
ImMalloc( buffer, unsigned char *, (width + 7) / 8 );
pPixel = ImVfbQFirst( vfb );
for ( y = 0; y < height; y++ )
{
byte = 0;
shift = 7;
pBuffer = buffer;
for ( x = 0; x < width; x++ )
{
byte |= (ImVfbQMono( vfb, pPixel ) & 0x1) << shift--;
ImVfbSInc( vfb, pPixel );
if ( shift == -1 )
{
*pBuffer++ = byte;
shift = 7;
byte = 0;
}
}
if ( shift != 7 )
*pBuffer++ = byte;
IMWrite( ioType, fd, fp, buffer, pBuffer - buffer );
}
free( (char *)buffer );
return ( 1 );
}
static int
#ifdef __STDC__
imRpbmWrite8(ImFileFormatWriteMap * pMap, int ioType, int fd, FILE *fp, TagTable *flagsTable, TagTable *tagTable )
#else
imRpbmWrite8( pMap, ioType, fd, fp, flagsTable, tagTable )
ImFileFormatWriteMap *pMap; /* Write map entry to adhear to */
int ioType; /* I/O type flag */
int fd; /* Unbuffered file descriptor */
FILE *fp; /* Buffered file pointer */
TagTable *flagsTable; /* Max color value flag */
TagTable *tagTable; /* Tag list to read from */
#endif
{
int x, y; /* Pixel location counters */
ImVfbPtr pPixel; /* Current pixel */
ImVfb *vfb; /* Image to output */
int width; /* Image width */
int height; /* Image height */
unsigned char buf[200]; /* Temp buffer */
unsigned char *buffer; /* Line buffer */
unsigned char *pBuffer; /* Current location in buffer */
char message[100]; /* ImInfo message */
/*
* Get the VFB and its attributes. Write the PBM header.
*/
TagEntryQValue( TagTableQDirect( tagTable, "image vfb", 0 ), &vfb );
width = ImVfbQWidth( vfb );
height = ImVfbQHeight( vfb );
sprintf( (char *)buf, "%c%c\n%d %d\n255\n", IMPBM_MAGIC1, IMRPGM_MAGIC2,
width, height );
IMWrite( ioType, fd, fp, buf, strlen((char*) buf ) );
ImInfo ("Byte Order","Most Significant Byte First");
ImInfo ("Type","8-bit Grayscale");
sprintf (message, "%d x %d",width, height);
ImInfo ("Resolution",message);
ImInfo ("Compression", "none");
ImMalloc( buffer, unsigned char *, width );
pPixel = ImVfbQFirst( vfb );
for ( y = 0; y < height; y++ )
{
pBuffer = buffer;
for ( x = 0; x < width; x++ )
{
*pBuffer++ = ImVfbQIndex8( vfb, pPixel );
ImVfbSInc( vfb, pPixel );
}
IMWrite( ioType, fd, fp, buffer, pBuffer - buffer );
}
free( (char *)buffer );
return ( 1 );
}
static int
#ifdef __STDC__
imRpbmWriteRGB(ImFileFormatWriteMap * pMap, int ioType, int fd, FILE *fp, TagTable *flagsTable, TagTable *tagTable )
#else
imRpbmWriteRGB( pMap, ioType, fd, fp, flagsTable, tagTable )
ImFileFormatWriteMap *pMap; /* Write map entry to adhear to */
int ioType; /* I/O type flag */
int fd; /* Unbuffered file descriptor */
FILE *fp; /* Buffered file pointer */
TagTable *flagsTable; /* Max color value flag */
TagTable *tagTable; /* Tag list to read from */
#endif
{
int x, y; /* Pixel location counters */
ImVfbPtr pPixel; /* Current pixel */
ImVfb *vfb; /* Image to output */
int width; /* Image width */
int height; /* Image height */
unsigned char buf[200]; /* Temp buffer */
unsigned char *buffer; /* Line buffer */
unsigned char *pBuffer; /* Current location in buffer */
char message[100]; /* ImInfo message */
/*
* Get the VFB and its attributes. Write the PPM header.
*/
TagEntryQValue( TagTableQDirect( tagTable, "image vfb", 0 ), &vfb );
width = ImVfbQWidth( vfb );
height = ImVfbQHeight( vfb );
sprintf( (char *)buf, "%c%c\n%d %d\n255\n", IMPBM_MAGIC1, IMRPPM_MAGIC2,
width, height );
IMWrite( ioType, fd, fp, buf, strlen((char*) buf ) );
ImInfo ("Byte Order","Most Significant Byte First");
ImInfo ("Type","24-bit RGB");
sprintf (message, "%d x %d",width, height);
ImInfo ("Resolution",message);
ImInfo ("Compression", "none");
ImMalloc( buffer, unsigned char *, width * 3 );
pPixel = ImVfbQFirst( vfb );
for ( y = 0; y < height; y++ )
{
pBuffer = buffer;
for ( x = 0; x < width; x++ )
{
*pBuffer++ = ImVfbQRed( vfb, pPixel );
*pBuffer++ = ImVfbQGreen( vfb, pPixel );
*pBuffer++ = ImVfbQBlue( vfb, pPixel );
ImVfbSInc( vfb, pPixel );
}
IMWrite( ioType, fd, fp, buffer, pBuffer - buffer );
}
free( (char *)buffer );
return ( 1 );
}
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