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jedioutcast/utils/roq2/libim/immiff.c

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Jedi Outcast v056
2013-04-04 18:02:27 +00:00
/**
** $Header: /roq/libim/immiff.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/immiff.c 1 11/02/99 4:38p Zaphod $"
/**
** FILE
** immiff.c- ImageMagick's Machine Independent File Format file i/o
**
** PROJECT
** libim - SDSC image manipulation library
**
** DESCRIPTION
** immiff.c contains routines to read and write ImageMagick's MIFF
** 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
** imMiffRead f read a MIFF file
** imMiffWriteRGB f write an RGB MIFF file
** imMiffWriteIndex f write an Indexed MIFF file
**
** HISTORY
** $Log: /roq/libim/immiff.c $
*
* 1 11/02/99 4:38p Zaphod
* Revision 1.6 1995/06/30 22:09:07 bduggan
* removed strings.h
*
* Revision 1.5 1995/06/29 00:28:04 bduggan
* updated copyright year
*
* Revision 1.4 1995/06/29 00:20:26 bduggan
* changed comment
*
* Revision 1.3 1995/06/15 20:10:59 bduggan
* took out some useless vars
*
* Revision 1.2 1995/05/17 23:45:35 bduggan
* Used library 'imSameRGB' calls instead of local miff calls
*
** Revision 1.1 1995/04/03 21:29:34 bduggan
** Initial revision
**
**
**/
#include <string.h>
#include "iminternal.h"
/**
** FORMAT
** MIFF - Magick Image File Format
**
** AKA
** (none)
**
** FORMAT REFERENCES
** Anonymous ftp at ftp.x.org,
** file: contrib/applications/ImageMagick/ImageMagick-3.6.tar.gz
**
** CODE CREDITS
** Brian Duggan, Custom Development, San Diego Supercomputer Center, 1995.
**
** DESCRIPTION
** MIFF files may contain multiple images. To store multiple images,
** one can simply create several MIFF's, then concatenate them together.
** A single MIFF file contains a header, followed by a clt (optional),
** followed by pixel data.
**
** Header
** ------
** The header is text based. The idea is that if you `more` a
** .miff, you'll be able to see what type of file it is.
**
** A miff header consists of labels of the form, "field=value",
** and comments contained in curly braces ({}). The header ends
** with a colon (:) followed by a newline character.
**
** By convention, a formfeed character and a newline character
** appear before the colon. (Hence, using 'more' will pause
** before the binary data.)
**
** The header fields are as follows:
** id=ImageMagick
** This indicates that we have a MIFF file.
** This field is mandatory.
**
** class=<class>
** <class> can be one of:
** DirectClass (RGB Image)
** PseudoClass (Indexed Image)
** If this field is omitted, the image is RGB.
**
** colors=<size of clt>
** If this is not present, there is not clt.
** (i.e. the image is RGB or grayscale)
** If this is present and the image is RGB, then
** this field is supposed to contain the number
** of colors in the image.
**
** columns=<image width>
** rows=<image height>
** These fields are required.
**
** compression=<compression type>
** <compression type> can be one of
** RunlengthEncoded
** QEncoded
** The RLE algorithm for RunlengthEncoded images is explained below.
** The algorithm for QEncoded images is similar to JPEG encoding. It
** is not supported here.
** If this field is omitted, there is no compression.
**
** matte=<value>
** if <value> is True, we have an alpha channel.
** Otherwise, we don't. Color indexed images
** can't have alpha channels.
**
** packets=<value>
** This is used for QEncoding. We ignore it.
**
** montage=<width>x<height>{+-}<x offset>{+-}<y offset>
** This is miff's handy way of storying a storyboard
** of pictures as one file, while seperating
** them within the file. It is not supported here.
**
** scene=<value>
** signature=<value>
** These fields are used when a miff is part of
** a sequence of pictures, and hence may have
** a CLT stored in a different frame. These
** options are not supported here.
**
** Sample MIFF header:
** {
** This is a color indexed image.
** }
** id=ImageMagick
** class=PseudoClass colors=2
** compression=RunlengthEncoded
** columns=768 rows=640
** <FF>
** :
** Notice that fields are seperate by spaces and/or
** carriage returns, and may occur in any order.
**
** Pixel Storage
** -------------
** If there is no compression, the pixels are simply stored
** as RGBRGB or RGBARGBA or IIIII (I = index). If there is
** RLE encoding then the following scheme is used:
**
** RLE encoding scheme:
**
** For RGB images, the data are encoded in 4 byte packages.
** (or 5 bytes if there is an alpha channel.) The first three
** (or four) bytes contain the data for a pixel. The fourth
** (fifth) byte contains one less than the number of pixels in
** the run. This value is in the range 0-255.
**
** For instance 4A 0D 00 05 indicates a run of six pixels
** with red component 4A, green component 0D, and blue component
** 00.
**
** The same scheme is used for encoding color-indexed images.
** The number of bytes in a package is either two or three
** depending on whether this is a 16-bit or an 8-bit color
** indexed image.
**
** Storage of the color lookup table:
**
** The CLT is stored directly after the header (if there
** is a CLT). It is simply a series of R, G, and B values.
** The number of triplets is indicated by the "colors" field
** in the header.
**/
/*
* MIFF - ImageMagick's MIFF file format
* For information on these structures, how to use them, etc. please
* see imfmt.c.
*/
#ifdef __STDC__
static int imMiffRead( int ioType, int fd, FILE *fp, TagTable *flagsTable, TagTable *tagTable );
static int imMiffWriteRGB( ImFileFormatWriteMap *pMap, int ioType, int fd, FILE *fp,
TagTable *flagsTable, TagTable *tagTable);
static int imMiffWriteRawRGB( ImVfb* vfb, int fd, FILE* fp, int numChans, int ioType);
static int imMiffWriteRLERGB( ImVfb* vfb, int fd, FILE* fp, int ioType);
static int imMiffWriteRLERGBA( ImVfb* vfb, int fd, FILE* fp, int ioType);
static int imMiffWriteRawIndex8(ImVfb* vfb, int fd, FILE* fp, int ioType);
static int imMiffWriteRawIndex16(ImVfb* vfb, int fd, FILE* fp, int ioType);
static int imMiffWriteRLEIndex8(ImVfb* vfb, int fd, FILE* fp, int ioType);
static int imMiffWriteRLEIndex16(ImVfb* vfb, int fd, FILE* fp, int ioType);
static int imMiffWriteIndex( ImFileFormatWriteMap *pMap, int ioType, int fd, FILE *fp,
TagTable *flagsTable, TagTable *tagTable);
static char* imMiffGetHeaderField( char* header, char* field);
static ImClt * imMiffReadClt( int ioType, int fd, FILE* fp, int cltSize );
static ImVfb* imMiffReadRLE(int ioType, int fd, FILE* fp, int width,int height,int numChans, int chanDepth);
static ImVfb* imMiffReadRaw(int ioType, int fd, FILE* fp, int width,int height,int numChans, int chanDepth);
static char* strToLower( char* str);
#else
static int imMiffRead( );
static int imMiffWriteRGB( );
static char* imMiffGetHeaderField( );
static ImClt * imMiffReadClt( );
static ImVfb* imMiffReadRLE( );
static ImVfb* imMiffReadRaw( );
static char* strToLower( );
static int imMiffWriteIndex();
static int imMiffWriteRawRGB( );
static int imMiffWriteRLERGB( );
static int imMiffWriteRLERGBA( );
static int imMiffWriteRLEIndex8();
static int imMiffWriteRLEIndex16();
static int imMiffWriteRawIndex8();
static int imMiffWriteRawIndex16();
#endif
static char *imMiffNames[ ] = { "miff", NULL };
static ImFileFormatReadMap imMiffReadMap[ ] =
{
/* in out */
/* type,ch,dep, attr. VFB type attr. */
{ IN,1,8, 0, IMVFBINDEX8, 0 },
{ IN,1,8, RLE, IMVFBINDEX8, 0 },
{ IN,1,8, C, IMVFBINDEX8, 0 },
{ IN,1,8, RLE|C, IMVFBINDEX8, 0 },
{ IN,1,16, C, IMVFBINDEX16, 0 },
{ IN,1,16, RLE | C,IMVFBINDEX16, 0 },
{ RGB,3,8, 0, IMVFBRGB, 0 },
{ RGB,3,8, RLE, IMVFBRGB, 0 },
{ RGB,4,8, A, IMVFBRGB, A },
{ RGB,4,8, RLE|A, IMVFBRGB, A },
{ -1, 0, -1, 0 },
};
static ImFileFormatWriteMap imMiffWriteMap[ ] =
{
/* in out */
/* VFB type, attr., type,ch,dep, attr., func */
{ IMVFBRGB, 0, RGB,3,8, RLE, imMiffWriteRGB},
{ IMVFBRGB, A, RGB,4,8, A|RLE, imMiffWriteRGB},
{ IMVFBRGB, 0, RGB,3,8, 0, imMiffWriteRGB},
{ IMVFBRGB, A, RGB,4,8, A, imMiffWriteRGB},
{ IMVFBINDEX8, 0, IN,1,8, RLE, imMiffWriteIndex},
{ IMVFBINDEX8, C, IN,1,8, C|RLE, imMiffWriteIndex},
{ IMVFBINDEX8, 0, IN,1,8, 0, imMiffWriteIndex},
{ IMVFBINDEX8, C, IN,1,8, C, imMiffWriteIndex},
{ IMVFBINDEX16, C, IN,1,16, C|RLE, imMiffWriteIndex},
{ IMVFBINDEX16, C, IN,1,16, C, imMiffWriteIndex},
{ -1, 0, -1, 0, NULL },
};
static ImFileMagic imFileMiffMagic []=
{
{ 0, 0, NULL },
};
ImFileFormat ImFileMiffFormat =
{
imMiffNames, "ImageMagick's MIFF file format",
"John Cristy",
"8 or 16-bit color index with optional CLT and 24-bit RGB color images with optional alpha channels,\n\
uncompressed (verbatim) and RLE-compressed.",
"8 or 16-bit color index with optional CLT and 24-bit RGB color images with optional alpha channels,\n\
uncompressed (verbatim) and RLE-compressed.",
imFileMiffMagic,
IMMULTI, IMPIPE,
IMMULTI, IMPIPE,
imMiffRead, imMiffReadMap, imMiffWriteMap
};
/*
* FUNCTION
* imMiffRead - Read a MIFF file
*
* DESCRIPTION
* The file header is read and the size of the image determined.
* Space is allocated for the VFB and the run codes read in to
* a run buffer. The run buffer is then expanded into straight
* RGB values in the VFB and the completed VFB added to the tag list.
*/
static int /* Returns # tags read in */
#ifdef __STDC__
imMiffRead( int ioType, int fd, FILE *fp, TagTable *flagsTable, TagTable *tagTable )
#else
imMiffRead( ioType, fd, fp, flagsTable, tagTable )
int ioType; /* I/O flags */
int fd; /* Input file descriptor */
FILE *fp; /* Input file pointer */
TagTable *flagsTable; /* Flags */
TagTable *tagTable; /* Tag table to add to */
#endif
{
char *header; /* Contains the (text) header */
char c; /* Contains a single char */
int skippingComment; /* flag that says we're skipping stuff */
int index; /* index into character array */
char* fieldValue; /* value of a field in the header */
int numChans; /* 1,3 or 4 (Indexed, rgb or rgba) */
int chanDepth; /* 8 or 16 (16 for index16) */
int compression; /* IMCOMPNONE or IMCOMPRLE */
int width, height; /* Dimensions */
int cltSize; /* 0 means no CLT */
char message[300]; /* Holds message */
ImVfb *vfb; /* new vfb */
ImClt* clt; /* new clt */
int moreImages; /* flag saying to continue reading */
int numImages; /* number of images read */
int retVal; /* return value from BinRead call */
/*
* Read in the header.
*/
ImMalloc (header, char* , 1024*sizeof(char));
numImages = 0;
moreImages = 1;
while (moreImages)
{
index = 0;
c = '\0';
skippingComment = 0;
/*
* Read the next character if ...
* we haven't read a :, and we're not inside a comment block
* OR
* we are inside a comment block
*
* This loop reads in anything that is not contained between two
* curly braces. (It also skips any left curly braces.)
*/
while ( (c!=':' && !skippingComment) || skippingComment)
{
if( (retVal = ImBinRead( ioType,fd,fp,&c,CHAR,sizeof(char),1))<0)
ImReturnBinError( );
if (retVal==0)
break;
if (skippingComment==1 && c=='}')
skippingComment = 0;
if (c=='{')
skippingComment = 1;
if (skippingComment==0 && c!='}')
{ /* Add this character to our array */
header[index++] = c;
if (index >= 1024)
{
/* This'll only happen if there
* are an extraordinary number of
* whitespace characters in the
* header, or if there are a lot
* of illegal fields. We shan't
* cater to such miff files.
*/
ImErrorFatal(ImQError(), -1, IMEMALLOC);
}
}
}
header[index] = '\0';
if (retVal==0)
break;
/*
* We just read in a ':'. Read in a newline character,
* then we'll be done with the header.
*/
if( ImBinRead( ioType,fd,fp,&c,CHAR,sizeof(char),1)<=0)
ImReturnBinError( );
numImages++; /* If we made it this far, hopefully there's an image. */
if (numImages > 1)
{
sprintf(message,"%d",numImages);
ImInfo ("Image", message);
}
/*
* Get the image dimensions
*/
fieldValue = imMiffGetHeaderField(header,"rows");
if (fieldValue==NULL)
{
ImErrorFatal (ImQError( ), -1, IMENOIMAGE);
}
height = atoi(fieldValue);
fieldValue = imMiffGetHeaderField(header,"columns");
if (fieldValue==NULL)
{
ImErrorFatal (ImQError( ), -1, IMENOIMAGE);
}
width = atoi(fieldValue);
sprintf(message,"%d x %d",width, height);
ImInfo("Resolution",message);
fieldValue = imMiffGetHeaderField(header,"class");
if (fieldValue==NULL || strcmp(fieldValue,"directclass")==0)
{
ImInfo ("Type","24-bit RGB");
/* Is there an alpha channel ? */
fieldValue = imMiffGetHeaderField(header,"matte");
if (fieldValue && strcmp(fieldValue,"true")==0)
{
numChans = 4;
ImInfo ("Alpha Channel","8-bit");
}
else
{
numChans = 3;
ImInfo ("Alpha Channel","none");
}
chanDepth = 8;
/* Can't a have a clt with an RGB image */
cltSize = 0;
ImInfo("Color Table", "none");
}
else
{
/* Color indexed */
numChans = 1;
/* Are we 8 or 16 bit? */
fieldValue = imMiffGetHeaderField(header,"colors");
if (fieldValue==NULL)
cltSize = 0;
else
cltSize = atoi(fieldValue);
if (cltSize > (1<<8))
chanDepth = 16;
else
chanDepth = 8;
sprintf(message,"%d-bit color indexed",chanDepth);
ImInfo ("Type",message);
/* Do we have a clt? */
if (cltSize==0)
{
ImInfo("Color Table","none");
}
else
{
sprintf(message,"%d entries",cltSize);
ImInfo("Color Table", message);
}
}
/*
* Is there compression?
*/
fieldValue = imMiffGetHeaderField(header,"compression");
if (fieldValue==NULL)
{
compression = IMCOMPNONE;
ImInfo ("Compression","none");
}
else
if (strcmp(fieldValue,"runlengthencoded")==0)
{
compression = IMCOMPRLE;
ImInfo ("Compression","Run Length Encoded");
}
else
{
ImErrorFatal ("Unsupported compression scheme", -1, IMENOIMAGE);
}
/*
* Read the clt if there is one
*/
if (cltSize!=0)
{
clt = imMiffReadClt( ioType, fd, fp, cltSize );
if (clt==IMCLTNULL) /* error */
return 0;
}
else
clt = IMCLTNULL;
/* Read the vfb! */
if (compression==IMCOMPRLE)
{
vfb = imMiffReadRLE(ioType, fd, fp, width, height, numChans, chanDepth);
}
else
{
vfb = imMiffReadRaw(ioType, fd, fp, width, height, numChans, chanDepth);
}
if (vfb==IMVFBNULL)
return 0;
if (clt!=IMCLTNULL)
{
ImVfbSClt (vfb, clt);
TagTableAppend( tagTable, TagEntryAlloc( "image clt", POINTER, &clt));
}
else
{
ImVfbSClt (vfb, IMCLTNULL);
}
TagTableAppend( tagTable, TagEntryAlloc( "image vfb", POINTER, &vfb));
/*
* Are there any more images ?
*/
moreImages = 1; /* Yes. The only way to exit the loop is by */
/* failing to read the header. */
} /* End of while-more images */
return numImages;
}
/*
* FUNCTION
* imMiffGetHeaderField
*
* DESCRIPTION
* Parse the string, looking for something of
* the form field=value. Return value (in lower case).
* If field is not found, return NULL.
*/
static char* /* returns value for this field in lower case */
#ifdef __STDC__
imMiffGetHeaderField( char* header, char* field)
#else
imMiffGetHeaderField( header, field)
char* header;
char* field;
#endif
{
char* ptr; /* points into the string */
static char ret[100]; /* string to return */
if (header==NULL) return NULL;
if (field==NULL) return NULL;
ptr = strstr(header,field);
if (ptr==NULL)
return NULL;
ptr += strlen(field);
if ((*ptr)!='=') return NULL; /* need an '=' */
sscanf (ptr+1,"%s",ret); /* Read the next word */
return strToLower(ret);
}
/*
* FUNCTION
* imMiffReadClt
*
* DECSRIPTION
* Read in the clt from a MIFF image file
*/
static ImClt * /* Returns a brand new clt */
#ifdef __STDC__
imMiffReadClt( int ioType, int fd, FILE* fp,int cltSize )
#else
imMiffReadClt( ioType, fd, fp, cltSize )
int ioType;
int fd;
FILE* fp;
int cltSize;
#endif
{
ImClt* clt; /* Our new clt */
ImCltPtr cltPtr; /* points at our new clt */
unsigned char* rbuf; /* holds the clt data */
unsigned char* rbufptr; /* points into rbuf */
int i; /* loop index */
clt = ImCltAlloc (cltSize);
/* Read in the values */
cltPtr = ImCltQFirst(clt);
ImMallocRetOnError (rbuf, unsigned char*, 3 * cltSize, IMCLTNULL);
rbufptr = rbuf;
if ( ImBinRead (ioType, fd, fp, rbuf, UCHAR, 1, 3 * cltSize) == -1)
{
ImReturnValBinError( IMCLTNULL );
}
/*
* Now we've read in the data. Put it in the clt.
*/
for (i=0; i<cltSize; i++)
{
ImCltSRed ( cltPtr, *rbufptr++);
ImCltSGreen ( cltPtr, *rbufptr++);
ImCltSBlue ( cltPtr, *rbufptr++);
cltPtr = ImCltQNext( clt, cltPtr );
}
free (rbuf);
return clt;
}
/*
* FUNCTION
* imMiffReadRLE
*
* DESCRIPTION
* Read an RLE encoded MIFF vfb
*/
static ImVfb* /* Returns a new vfb */
#ifdef __STDC__
imMiffReadRLE(int ioType, int fd, FILE* fp, int width,int height,int numChans, int chanDepth)
#else
imMiffReadRLE(ioType, fd, fp, width, height, numChans, chanDepth)
int ioType;
int fd;
FILE *fp;
int width;
int height;
int numChans;
int chanDepth;
#endif
{
ImVfb* vfb; /* new vfb */
ImVfbPtr vfbPtr; /* points into the new vfb */
unsigned char rbuf[7]; /* Holds some data */
int i; /* loop index */
unsigned int uintval; /* holds an index16 value */
switch (numChans)
{
case 1 : /* Color indexed */
if (chanDepth==8)
{ /* index8 */
if ((vfb=ImVfbAlloc( width, height, IMVFBINDEX8 ))==IMVFBNULL)
{
ImErrorFatal (ImQError( ), IMVFBNULL, ImErrNo);
}
/* Read packets of size 2 */
vfbPtr = ImVfbQPtr( vfb, 0, 0);
while ( ImBinRead (ioType, fd, fp, rbuf, UCHAR, 1, 2) > 0)
{
for (i=0; i < rbuf[1] + 1; i++)
{
ImVfbSIndex8( vfb, vfbPtr, rbuf[0]);
vfbPtr = ImVfbQNext( vfb, vfbPtr);
}
}
}
else
{ /* index16 */
if ((vfb=ImVfbAlloc( width, height, IMVFBINDEX16 ))==IMVFBNULL)
{
ImErrorFatal (ImQError( ), IMVFBNULL, ImErrNo);
}
vfbPtr = ImVfbQPtr( vfb, 0, 0);
/* Read packets of size 3 */
while ( ImBinRead (ioType, fd, fp, rbuf, UCHAR, 1, 3) > 0)
{
uintval = rbuf[1];
uintval |= rbuf[0] << 8;
for (i=0; i < rbuf[2] + 1; i++)
{
ImVfbSIndex16( vfb, vfbPtr, uintval);
vfbPtr = ImVfbQNext( vfb, vfbPtr);
}
}
} /* End of index16 */
break;
case 3 : /* RGB */
if ((vfb=ImVfbAlloc( width, height, IMVFBRGB ))==IMVFBNULL)
{
ImErrorFatal (ImQError( ), IMVFBNULL, ImErrNo);
}
vfbPtr = ImVfbQPtr( vfb, 0, 0);
/* Read packets of size 4 */
while ( ImBinRead (ioType, fd, fp, rbuf, UCHAR, 1, 4) > 0)
{
for (i=0;i<rbuf[3]+1;i++)
{
ImVfbSRed ( vfb, vfbPtr, rbuf[0]);
ImVfbSGreen( vfb, vfbPtr, rbuf[1]);
ImVfbSBlue ( vfb, vfbPtr, rbuf[2]);
vfbPtr = ImVfbQNext( vfb, vfbPtr);
}
}
break;
case 4 : /* RGBA */
if ((vfb=ImVfbAlloc( width, height, IMVFBRGB|IMVFBALPHA ))==IMVFBNULL)
{
ImErrorFatal (ImQError( ), IMVFBNULL, ImErrNo);
}
vfbPtr = ImVfbQPtr( vfb, 0, 0);
/* Read packets of size 5 */
while ( ImBinRead (ioType, fd, fp, rbuf, UCHAR, 1, 5) > 0)
{
for (i=0;i<rbuf[4]+1;i++)
{
ImVfbSRed ( vfb, vfbPtr, rbuf[0]);
ImVfbSGreen( vfb, vfbPtr, rbuf[1]);
ImVfbSBlue ( vfb, vfbPtr, rbuf[2]);
ImVfbSAlpha( vfb, vfbPtr, rbuf[3]);
vfbPtr = ImVfbQNext( vfb, vfbPtr);
}
}
break;
} /* End of switch */
return vfb;
}
/*
* FUNCTION
* imMiffReadRaw
*
* DESCRIPTION
* Read an unencoded MIFF vfb
*/
static ImVfb* /* returns a new vfb */
#ifdef __STDC__
imMiffReadRaw(int ioType, int fd, FILE* fp, int width,int height,int numChans, int chanDepth)
#else
imMiffReadRaw(ioType, fd, fp, width, height, numChans, chanDepth)
int ioType;
int fd;
FILE *fp;
int width;
int height;
int numChans;
int chanDepth;
#endif
{
ImVfb* vfb; /* new vfb */
ImVfbPtr vfbPtr; /* points into the new vfb */
unsigned char* rbuf; /* Holds the data */
unsigned char* rbufptr; /* Points at the data */
int i; /* index */
unsigned int uintval; /* holds an index16 value */
ImCallocRetOnError(rbuf, unsigned char*, numChans * width * height * (chanDepth / 8), sizeof(char), IMVFBNULL);
if (ImBinRead(ioType, fd, fp, rbuf, UCHAR, 1,
numChans * width * height * (chanDepth / 8))==-1)
{
ImReturnValBinError( IMVFBNULL );
}
/*
* rbuf now contains all the data we need.
* Store it in the vfb in the correct manner
* depending on what type of vfb we have.
*/
/* Initialize rbufptr, and vfbPtr */
rbufptr = rbuf;
switch (numChans)
{
case 1 : /* Color indexed */
if (chanDepth==8)
{ /* index8 */
if ((vfb=ImVfbAlloc( width, height, IMVFBINDEX8 ))==IMVFBNULL)
{
ImErrorFatal (ImQError( ), IMVFBNULL, ImErrNo);
}
vfbPtr = ImVfbQPtr( vfb, 0, 0);
for (i=0; i < width * height; i++)
{
ImVfbSIndex8( vfb, vfbPtr, *rbufptr++);
vfbPtr = ImVfbQNext( vfb, vfbPtr);
}
}
else
{ /* index16 */
if ((vfb=ImVfbAlloc( width, height, IMVFBINDEX16 ))==IMVFBNULL)
{
ImErrorFatal (ImQError( ), IMVFBNULL, ImErrNo);
}
vfbPtr = ImVfbQPtr( vfb, 0, 0);
for (i=0; i < width * height; i++)
{
uintval = *rbufptr++ << 8;
uintval |= (*rbufptr++);
ImVfbSIndex16( vfb, vfbPtr, uintval);
vfbPtr = ImVfbQNext( vfb, vfbPtr);
}
}
break;
case 3 : /* RGB */
if ((vfb=ImVfbAlloc( width, height, IMVFBRGB ))==IMVFBNULL)
{
ImErrorFatal (ImQError( ), IMVFBNULL, ImErrNo);
}
vfbPtr = ImVfbQPtr( vfb, 0, 0);
for (i=0; i < width * height; i++)
{
ImVfbSRed ( vfb, vfbPtr, *rbufptr++);
ImVfbSGreen( vfb, vfbPtr, *rbufptr++);
ImVfbSBlue ( vfb, vfbPtr, *rbufptr++);
vfbPtr = ImVfbQNext( vfb, vfbPtr);
}
break;
case 4 : /* RGBA */
if ((vfb=ImVfbAlloc( width, height, IMVFBRGB|IMVFBALPHA ))==IMVFBNULL)
{
ImErrorFatal (ImQError( ), IMVFBNULL, ImErrNo);
}
vfbPtr = ImVfbQPtr( vfb, 0, 0);
for (i=0; i < width * height; i++)
{
ImVfbSRed ( vfb, vfbPtr, *rbufptr++);
ImVfbSGreen( vfb, vfbPtr, *rbufptr++);
ImVfbSBlue ( vfb, vfbPtr, *rbufptr++);
ImVfbSAlpha( vfb, vfbPtr, *rbufptr++);
vfbPtr = ImVfbQNext( vfb, vfbPtr);
}
break;
}
free (rbuf);
return vfb;
}
/*
* FUNCTION
* imMiffWriteRGB
*
* DESCRIPTION
* Write an RGB miff file with...
* - RLE or no compression
* - possibly an alpha channel
*/
static int /* returns number of tags used */
#ifdef __STDC__
imMiffWriteRGB( ImFileFormatWriteMap *pMap, int ioType, int fd, FILE *fp,
TagTable *flagsTable, TagTable *tagTable)
#else
imMiffWriteRGB( pMap, ioType, fd, fp, flagsTable, tagTable)
ImFileFormatWriteMap * pMap;
int ioType;
int fd;
FILE* fp;
TagTable* flagsTable;
TagTable* tagTable;
#endif
{
ImVfb* vfb; /* image vfb */
ImVfbPtr vfbptr; /* points into a vfb */
char header[400]; /* header (text based) */
int x, y; /* dimensions of vfb */
char message[100]; /* another buffer */
char* filename; /* filename */
int numChans; /* 3 or 4 channels. */
int numImages; /* number of images */
int curImage; /* loop index */
BinByteOrder( BINMBF );
numImages = TagTableQNEntry (tagTable, "image vfb");
for (curImage=0;curImage<numImages;curImage++)
{
/* Get the vfb */
TagEntryQValue( TagTableQDirect( tagTable, "image vfb", curImage ), &vfb );
x = ImVfbQWidth(vfb);
y = ImVfbQHeight(vfb);
if (numImages > 1)
{
sprintf(message,"%d of %d",curImage+1, numImages);
ImInfo("Image",message);
}
sprintf(message,"%d x %d", x, y);
ImInfo ("Resolution", message);
ImInfo ("Type", "24-bit RGB");
ImInfo ("Color Table","none");
if (pMap->map_outAttributes & IMCOMPRLE)
{
ImInfo ("Compression Type", "Run Length Encoded");
}
else
{
ImInfo ("Compression Type", "none");
}
if (pMap->map_outAttributes & IMALPHAYES)
{
numChans = 4;
ImInfo ("Alpha Channel", "8-bit");
}
else
{
numChans = 3;
ImInfo ("Alpha Channel", "none");
}
if (!flagsTable || TagTableQNEntry (flagsTable, "file name")==0)
{
filename = NULL;
}
else
{
TagEntryQValue( TagTableQDirect ( flagsTable, "file name", 0 ), &filename);
}
/*
* Write the header
*/
sprintf(header, "{\n %s\n %s\n}\nid=ImageMagick\nclass=DirectClass\nrows=%d\ncolumns=%d\n%s%s\f\n:\n",
filename ? filename : "(untitled)",
"This file was created by the SDSC Image Tools.",
y, /* rows */
x, /* columns */
numChans==4 ? "matte=True\n" : "matte=False\n",
(pMap->map_outAttributes & IMCOMPRLE) ? "compression=RunlengthEncoded\n" : ""
);
if ( ImBinWrite( ioType, fd, fp, header, CHAR, 1, strlen(header))==-1)
{
ImReturnBinError( );
}
/*
* Write the pixels
*/
if (!(pMap->map_outAttributes & IMCOMPRLE))
{
if (imMiffWriteRawRGB(vfb, fd, fp, numChans, ioType)==-1)
return -1;
}
else /* RLE compress */
{
if (pMap->map_outAttributes & IMALPHAYES)
{
if (imMiffWriteRLERGBA(vfb, fd, fp, ioType)==-1)
return -1;
}
else
{
if (imMiffWriteRLERGB(vfb, fd, fp, ioType)==-1)
return -1;
}
}
}
return numImages;
}
/*
* FUNCTION
* imMiffWriteRawRGB
*
* DESCRIPTION
* Write the pixels of the vfb without compressing them.
*/
static int /* returns status */
#ifdef __STDC__
imMiffWriteRawRGB( ImVfb* vfb, int fd, FILE* fp, int numChans, int ioType)
#else
imMiffWriteRawRGB( vfb, fd, fp, numChans, ioType)
ImVfb* vfb;
int fd;
FILE* fp;
int numChans;
int ioType;
#endif
{
unsigned char* runBuffer; /* holds pixels */
ImVfbPtr vfbptr; /* points into a vfb */
int runIndex, i,j,x,y; /* indexes, dimensions */
x = ImVfbQWidth(vfb);
y = ImVfbQHeight(vfb);
ImMalloc( runBuffer, unsigned char *, sizeof (unsigned char) * x * numChans);
vfbptr = ImVfbQPtr( vfb, 0, 0);
for (i=0; i<y; i++) /* i goes through the rows */
{
runIndex = 0;
for (j=0;j<x;j++) /* Fill a buffer for this row. */
{
runBuffer[runIndex++] = ImVfbQRed(vfb, vfbptr);
runBuffer[runIndex++] = ImVfbQGreen(vfb, vfbptr);
runBuffer[runIndex++] = ImVfbQBlue(vfb, vfbptr);
if (numChans == 4)
runBuffer[runIndex++] = ImVfbQAlpha( vfb, vfbptr);
vfbptr = ImVfbQNext(vfb,vfbptr);
}
if ( ImBinWrite( ioType, fd, fp, runBuffer, UCHAR, 1, x * numChans)==-1)
{
ImReturnBinError( );
}
}
free(runBuffer);
return 1;
}
/*
* MACROS
* imMiffDumpRun3
* imMiffDumpRun4
* imMiffDumpRun1
* imMiffDumpRun2
*
* DESCRIPTION
* Dump RGB, RGBA, Index, and Index16 runs respectively.
* (These all use the file-wide variable 'dumpBuf')
*/
static unsigned char dumpBuf[7];
#define imMiffDumpRun3(r,g,b,len) \
dumpBuf[0] = r; dumpBuf[1] = g; dumpBuf[2] = b; \
dumpBuf[3] = len; \
if ( ImBinWrite( ioType, fd, fp, dumpBuf, UCHAR, 1, 4)==-1) \
{ \
ImReturnBinError( ); \
}
#define imMiffDumpRun4(r,g,b,a,len) \
dumpBuf[0] = r; dumpBuf[1] = g; dumpBuf[2] = b; \
dumpBuf[3] = a; dumpBuf[4] = len; \
if ( ImBinWrite( ioType, fd, fp, dumpBuf, UCHAR, 1, 5)==-1) \
{ \
ImReturnBinError( ); \
}
#define imMiffDumpRun1(v,len) \
dumpBuf[0] = v; \
dumpBuf[1] = len; \
if ( ImBinWrite( ioType, fd, fp, dumpBuf, UCHAR, 1, 2)==-1) \
{ \
ImReturnBinError( ); \
}
#define imMiffDumpRun2(v,len) \
dumpBuf[0] = ((v & 0xff00) >> 8); \
dumpBuf[1] = (v & 0x00ff); \
dumpBuf[2] = len; \
if ( ImBinWrite( ioType, fd, fp, dumpBuf, UCHAR, 1, 3)==-1) \
{ \
ImReturnBinError( ); \
}
/*
* FUNCTION
* imMiffWriteRLERGB
*
* DESCRIPTION
* Write the pixels of the vfb using RLE compression.
*/
static int /* returns status */
#ifdef __STDC__
imMiffWriteRLERGB( ImVfb* vfb, int fd, FILE* fp, int ioType)
#else
imMiffWriteRLERGB( vfb, fd, fp, ioType)
ImVfb* vfb;
int fd;
FILE* fp;
int ioType;
#endif
{
int runLength, i,x,y; /* index, dimensions */
ImVfbPtr thisPixel; /* this pixel */
ImVfbPtr lastPixel; /* last pixel */
unsigned char dumpBuf[10]; /* Buffer for output */
/*
* The unsigned ints above are used to store red,green, and blue
* values for pixels. i.e. three of the bytes are used for these
* values.
*/
x = ImVfbQWidth(vfb);
y = ImVfbQHeight(vfb);
runLength = 0;
lastPixel = ImVfbQPtr( vfb, 0, 0);
thisPixel = ImVfbQPtr( vfb, 0, 0);
for (i=1; i<x*y; i++) /* Skip the first pixel */
{
thisPixel = ImVfbQNext(vfb,thisPixel);
if (ImVfbSameRGB(vfb, lastPixel,thisPixel))
{
runLength++;
if (runLength > 0xff)
{
runLength--;
/* Dump run */
imMiffDumpRun3(ImVfbQRed(vfb,lastPixel),
ImVfbQGreen(vfb,lastPixel),
ImVfbQBlue(vfb,lastPixel),
runLength);
runLength = 0;
}
}
else /* new run. Dump the last one. */
{
imMiffDumpRun3(ImVfbQRed(vfb,lastPixel),
ImVfbQGreen(vfb,lastPixel),
ImVfbQBlue(vfb,lastPixel),
runLength);
runLength = 0;
}
lastPixel = thisPixel;
}
/* Dump the last run */
imMiffDumpRun3(ImVfbQRed(vfb,lastPixel),
ImVfbQGreen(vfb,lastPixel),
ImVfbQBlue(vfb,lastPixel),
runLength);
return 1;
}
/*
* FUNCTION
* imMiffWriteRLERGBA
*
* DESCRIPTION
* Write the pixels of the vfb (with alpha) using RLE compression.
*/
static int /* returns status */
#ifdef __STDC__
imMiffWriteRLERGBA( ImVfb* vfb, int fd, FILE* fp, int ioType)
#else
imMiffWriteRLERGBA( vfb, fd, fp, ioType)
ImVfb* vfb;
int fd;
FILE* fp;
int ioType;
#endif
{
ImVfbPtr vfbptr; /* points into a vfb */
int runLength, i,x,y; /* indexes, dimensions */
ImVfbPtr thisPixel; /* this pixel */
ImVfbPtr lastPixel; /* last pixel */
unsigned char dumpBuf[10]; /* Buffer for output */
/*
* The unsigned ints above are used to store red,green, and blue
* values for pixels. i.e. three of the bytes are used for these
* values.
*/
x = ImVfbQWidth(vfb);
y = ImVfbQHeight(vfb);
runLength = 0;
lastPixel = ImVfbQPtr( vfb, 0, 0);
thisPixel = ImVfbQPtr( vfb, 0, 0);
for (i=1; i<x*y; i++) /* Skip the first pixel */
{
thisPixel = ImVfbQNext(vfb,thisPixel);
if (ImVfbSameRGBA(vfb, lastPixel,thisPixel))
{
runLength++;
if (runLength > 0xff)
{
runLength--;
/* Dump run */
imMiffDumpRun4(ImVfbQRed(vfb,lastPixel),
ImVfbQGreen(vfb,lastPixel),
ImVfbQBlue(vfb,lastPixel),
ImVfbQAlpha(vfb,lastPixel),
runLength);
runLength = 0;
}
}
else /* new run. Dump the last one. */
{
imMiffDumpRun4(ImVfbQRed(vfb,lastPixel),
ImVfbQGreen(vfb,lastPixel),
ImVfbQBlue(vfb,lastPixel),
ImVfbQAlpha(vfb,lastPixel),
runLength);
runLength = 0;
}
lastPixel = thisPixel;
}
/* Dump the last run */
imMiffDumpRun4(ImVfbQRed(vfb,lastPixel),
ImVfbQGreen(vfb,lastPixel),
ImVfbQBlue(vfb,lastPixel),
ImVfbQAlpha(vfb,lastPixel),
runLength);
return 1;
}
/*
* FUNCTION
* imMiffWriteIndex
*
* DESCRIPTION
* Write an indexed miff file with...
* - no compression
* - possibly a clt
*/
static int /* returns number of tags used */
#ifdef __STDC__
imMiffWriteIndex( ImFileFormatWriteMap *pMap, int ioType, int fd, FILE *fp,
TagTable *flagsTable, TagTable *tagTable)
#else
imMiffWriteIndex( pMap, ioType, fd, fp, flagsTable, tagTable)
ImFileFormatWriteMap * pMap;
int ioType;
int fd;
FILE* fp;
TagTable* flagsTable;
TagTable* tagTable;
#endif
{
ImVfb* vfb; /* image vfb */
char header[400]; /* header (text based) */
int i; /* loop indexes */
int runIndex; /* yet another index */
unsigned char* runBuffer;/* buffer */
char message[100]; /* another buffer */
char* filename; /* filename */
ImClt* clt; /* image clt */
ImCltPtr cltptr; /* points into the clt */
char colorstring[30]; /* string for the header */
int numColors; /* num of colors in clt*/
int chanDepth; /* 8 or 16 */
int numImages; /* number of images */
int curImage; /* loop index */
int numZeros; /* how much to pad the clt */
BinByteOrder( BINMBF );
numImages = TagTableQNEntry (tagTable, "image vfb");
for (curImage=0;curImage<numImages;curImage++)
{
/* Get the vfb */
TagEntryQValue( TagTableQDirect( tagTable, "image vfb", curImage ), &vfb );
/*
* Write the clt, if there is one.
*/
if (pMap->map_outAttributes & IMCLTYES)
{
clt = ImVfbQClt(vfb);
numColors = ImCltQNColors(clt);
if (pMap->map_outChannelDepth==16)
{
chanDepth = 16;
ImInfo ("Type", "16-bit Color Indexed");
/* Need to pad the color table if we don't have enough colors */
if (numColors <= 256)
numZeros = 257-numColors;
else
numZeros = 0;
}
else
{
chanDepth = 8;
ImInfo ("Type", "8-bit Color Indexed");
numZeros = 0;
}
sprintf(message,"%d entries",numColors+numZeros);
ImInfo ("Color Table",message);
sprintf(colorstring,"colors=%d\n",numColors+numZeros);
}
else /* no clt */
{
strcpy(colorstring, "" );
chanDepth = pMap -> map_outChannelDepth;
sprintf(message,"%d-bit Greyscale",chanDepth);
ImInfo ("Color Table","none");
ImInfo ("Type",message);
}
sprintf(message,"%d x %d", ImVfbQWidth(vfb), ImVfbQHeight(vfb));
ImInfo ("Resolution", message);
ImInfo ("Alpha Channel", "none");
if (!flagsTable || TagTableQNEntry (flagsTable, "file name")==0)
{
filename = NULL;
}
else
{
TagEntryQValue( TagTableQDirect ( flagsTable, "file name", 0 ), &filename);
}
/*
* Write the header
*/
sprintf(header, "{\n %s\n %s\n}\nid=ImageMagick\nclass=PseudoClass\nrows=%d\ncolumns=%d\n%s%s\f\n:\n",
filename ? filename : "(untitled)",
"This file was created by the SDSC Image Tools.",
ImVfbQHeight(vfb), /* rows */
ImVfbQWidth(vfb), /* columns */
(pMap->map_outAttributes & IMCOMPRLE) ? "compression=RunlengthEncoded\n" : "",
colorstring
);
if ( ImBinWrite( ioType, fd, fp, header, CHAR, 1, strlen(header))==-1)
{
ImReturnBinError( );
}
if (pMap->map_outAttributes & IMCLTYES)
{
/*
* Write the clt
*/
cltptr = ImCltQFirst( clt );
ImCalloc ( runBuffer, unsigned char *, (numColors + numZeros) * 3, 1);
runIndex = 0;
for (i=0;i<numColors;i++)
{
runBuffer[runIndex++] = ImCltQRed (cltptr);
runBuffer[runIndex++] = ImCltQGreen(cltptr);
runBuffer[runIndex++] = ImCltQBlue (cltptr);
cltptr = ImCltQNext( clt, cltptr);
}
if ( ImBinWrite( ioType, fd, fp, runBuffer, UCHAR, 1, (numColors+numZeros) * 3)==-1)
{
ImReturnBinError( );
}
free(runBuffer);
}
/*
* Write the pixels
*/
if (chanDepth==8)
{
if (pMap->map_outAttributes & IMCOMPRLE)
{
if (imMiffWriteRLEIndex8(vfb, fd, fp, ioType)<0)
return -1;
ImInfo ("Compression Type", "Run Length Encoded");
}
else
{
ImInfo ("Compression Type", "none");
if (imMiffWriteRawIndex8(vfb, fd, fp, ioType)<0)
return -1;
}
}
else /* 16-bit */
{
if (pMap->map_outAttributes & IMCOMPRLE)
{
if (imMiffWriteRLEIndex16(vfb, fd, fp, ioType)<0)
return -1;
ImInfo ("Compression Type", "Run Length Encoded");
}
else
{
if (imMiffWriteRawIndex16(vfb, fd, fp, ioType)<0)
return -1;
ImInfo ("Compression Type", "none");
}
}
}
return numImages;
}
/*
* FUNCTION
* imMiffWriteRawIndex8
*
* DESCRIPTION
* Write the pixels of an indexed vfb with no compression
*/
static int /* returns status */
#ifdef __STDC__
imMiffWriteRawIndex8(ImVfb* vfb, int fd, FILE* fp, int ioType)
#else
imMiffWriteRawIndex8(vfb, fd, fp, ioType)
ImVfb* vfb;
int fd;
FILE* fp;
int ioType;
#endif
{
int runIndex; /* index */
unsigned char* runBuffer;/* buffer */
ImVfbPtr vfbptr; /* points into a vfb */
int x, y; /* dimensions of vfb */
int i,j; /* loop indexes */
x = ImVfbQWidth(vfb);
y = ImVfbQHeight(vfb);
vfbptr = ImVfbQPtr( vfb, 0, 0);
ImMalloc( runBuffer, unsigned char *, sizeof (unsigned char) * x );
for (i=0; i<y; i++) /* i goes through the rows */
{
runIndex = 0;
for (j=0;j<x;j++) /* Fill a buffer for this row. */
{
runBuffer[runIndex++] = ImVfbQIndex(vfb, vfbptr);
vfbptr = ImVfbQNext(vfb,vfbptr);
}
if ( ImBinWrite( ioType, fd, fp, runBuffer, UCHAR, 1, x )==-1)
{
ImReturnBinError( );
}
}
free(runBuffer);
return 1;
}
/*
* FUNCTION
* imMiffWriteRawIndex16
*
* DESCRIPTION
* Write the pixels of an indexed vfb with no compression
*/
static int /* returns status */
#ifdef __STDC__
imMiffWriteRawIndex16(ImVfb* vfb, int fd, FILE* fp, int ioType)
#else
imMiffWriteRawIndex16(vfb, fd, fp, ioType)
ImVfb* vfb;
int fd;
FILE* fp;
int ioType;
#endif
{
int runIndex; /* index */
unsigned char* runBuffer;/* buffer */
ImVfbPtr vfbptr; /* points into a vfb */
int x, y; /* dimensions of vfb */
int i,j; /* loop indexes */
x = ImVfbQWidth(vfb);
y = ImVfbQHeight(vfb);
vfbptr = ImVfbQPtr( vfb, 0, 0);
ImMalloc( runBuffer, unsigned char *, sizeof (unsigned char) * x * 2 );
for (i=0; i<y; i++) /* i goes through the rows */
{
runIndex = 0;
for (j=0;j<x;j++) /* Fill a buffer for this row. */
{
runBuffer[runIndex++] = ((ImVfbQIndex16(vfb, vfbptr)) & 0xff00) >> 8;
runBuffer[runIndex++] = (ImVfbQIndex16(vfb, vfbptr)) & 0x00ff;
vfbptr = ImVfbQNext(vfb,vfbptr);
}
if ( ImBinWrite( ioType, fd, fp, runBuffer, UCHAR, 1, x*2 )==-1)
{
ImReturnBinError( );
}
}
free(runBuffer);
return 1;
}
/*
* FUNCTION
* imMiffWriteRLEIndex8
*
* DESCRIPTION
* Write the pixels of the vfb using RLE compression.
*/
static int /* returns status */
#ifdef __STDC__
imMiffWriteRLEIndex8( ImVfb* vfb, int fd, FILE* fp, int ioType)
#else
imMiffWriteRLEIndex8( vfb, fd, fp, ioType)
ImVfb* vfb;
int fd;
FILE* fp;
int ioType;
#endif
{
int runLength, i,x,y; /* indexes, dimensions */
ImVfbPtr thisPixel; /* this pixel */
ImVfbPtr lastPixel; /* last pixel */
unsigned char dumpBuf[10]; /* Buffer for output */
x = ImVfbQWidth(vfb);
y = ImVfbQHeight(vfb);
runLength = 0;
lastPixel = ImVfbQPtr( vfb, 0, 0);
thisPixel = ImVfbQPtr( vfb, 0, 0);
for (i=1; i<x*y; i++) /* Skip the first pixel */
{
thisPixel = ImVfbQNext(vfb,thisPixel);
if (ImVfbSameIndex8(vfb, lastPixel,thisPixel))
{
runLength++;
if (runLength > 0xff)
{
runLength--;
/* Dump run */
imMiffDumpRun1(ImVfbQIndex(vfb,lastPixel),
runLength);
runLength = 0;
}
}
else /* new run. Dump the last one. */
{
imMiffDumpRun1(ImVfbQIndex(vfb,lastPixel),
runLength);
runLength = 0;
}
lastPixel = thisPixel;
}
/* Dump the last run */
imMiffDumpRun1(ImVfbQIndex8(vfb,lastPixel), runLength);
return 1;
}
/*
* FUNCTION
* imMiffWriteRLEIndex16
*
* DESCRIPTION
* Write the pixels of the vfb using RLE compression.
*/
static int /* returns status */
#ifdef __STDC__
imMiffWriteRLEIndex16( ImVfb* vfb, int fd, FILE* fp, int ioType)
#else
imMiffWriteRLEIndex16( vfb, fd, fp, ioType)
ImVfb* vfb;
int fd;
FILE* fp;
int ioType;
#endif
{
int runLength, i,x,y; /* indexes, dimensions */
ImVfbPtr thisPixel; /* this pixel */
ImVfbPtr lastPixel; /* last pixel */
unsigned char dumpBuf[10]; /* Buffer for output */
x = ImVfbQWidth(vfb);
y = ImVfbQHeight(vfb);
runLength = 0;
lastPixel = ImVfbQPtr( vfb, 0, 0);
thisPixel = ImVfbQPtr( vfb, 0, 0);
for (i=1; i<x*y; i++) /* Skip the first pixel */
{
thisPixel = ImVfbQNext(vfb,thisPixel);
if (ImVfbSameIndex16(vfb, lastPixel,thisPixel))
{
runLength++;
if (runLength > 0xff)
{
runLength--;
/* Dump run */
imMiffDumpRun2(ImVfbQIndex16(vfb,lastPixel),
runLength);
runLength = 0;
}
}
else /* new run. Dump the last one. */
{
imMiffDumpRun2(ImVfbQIndex16(vfb,lastPixel),
runLength);
runLength = 0;
}
lastPixel = thisPixel;
}
/* Dump the last run */
imMiffDumpRun2(ImVfbQIndex16(vfb,lastPixel), runLength);
return 1;
}
/*
* FUNCTION
* strToLower
* DESCRIPTION
* convert a string into lower case
*/
static char* /* returns the string */
#ifdef __STDC__
strToLower(char* str)
#else
strToLower(str)
char* str;
#endif
{
char* ptr;
if (str==NULL)
return NULL;
ptr = str;
while (*ptr!='\0')
{
if (( *ptr >= 'A') && (*ptr <= 'Z'))
*ptr -= ('A' - 'a');
ptr++;
}
return str;
}
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