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/*
** vic.c - load a VICAR Image file for use inside xloadimage
**
** Khalid Soofi (August 1992)
*/
#define TRUE 1
#define FALSE 0
#define DEPTH 8
#define LBLSIZE label[0]
#define LINES label[8]
#define SAMPLES label[6]
#include <stdio.h>
#include "image.h"
#include <sys/types.h>
FILE *fp,*fopen();
int label[10];
char labstr[80];
int flag=0;
/*
** vicarIdent
**
** Identify passed file a VICAR Image
** return 1 for true
** return 0 otherwise
**
*/
unsigned int vicarIdent (fullname, name)
char *fullname, *name;
{
int i=0;
char IDENT[7];
char c;
if ( ! (fp = fopen(fullname,"r")) )
return(0);
/* identify the VICAR IMAGE */
if ( fscanf(fp,"%6s",IDENT) < 1 ||
strcmp(IDENT,"LBLSIZ") == 0 ) {
printf("%s is a VICAR Image: ",fullname);
fclose(fp);
}
else
return(0);
/* Fill up the label block of image */
fp = fopen(fullname,"r");
while ( i < 10) {
if ( fscanf(fp,"%c",&c) < 1 || c == '=' ||
fscanf(fp,"%d",&label[i]) < 1)
label[i] = 0;
++i;
}
printf("%d lines and %d samples\n", LINES , SAMPLES );
fclose(fp);
return(1);
}
/* vicHeader - print the history record */
static void vicarHeader(ptr)
char *ptr;
{
int i;
int prflag;
int rtflag;
printf("\n ---HISTORY RECORD------------------------------------\n");
for ( i=0, prflag=FALSE, rtflag=0 ; i < LBLSIZE ; i++ ) {
if ( *(ptr++) == '\'' ) {
prflag = !prflag;
rtflag++;
}
if ( prflag && (char)(*ptr) != '\'' )
printf("%c",(char)(*ptr));
if ( rtflag == 2 ) {
printf("\n");
rtflag = 0;
}
}
printf("\n -----------------------------------------------------\n");
}
/*
** vicarLoad
**
** Load Vicar image into an Image structure.
**
** Return pointer to allocated struct if successful, NULL otherwise
**
*/
Image *vicarLoad(fullname, name, verbose)
char *fullname, *name;
unsigned int verbose;
{
int i;
unsigned int mapsize, size;
Image *image;
byte *lineptr;
byte *map;
byte *mapred,*mapgreen,*mapblue;
ZFILE *zf;
if ( vicarIdent(fullname,name,verbose) == 0 )
return(0);
/* define the image structure */
image = newRGBImage( SAMPLES , LINES , DEPTH );
image->width = SAMPLES ;
image->height = LINES ;
image->depth = DEPTH ;
image->title = dupString(name);
/*
* Set up the grey scale lookup table:-
* From Jim frost 09.27.89 (sunraster.c)
* Copyright 1989, 1991 Jim Frost.
* See included file "copyright.h" for complete copyright information.
*/
mapsize = 256*3;
map= lmalloc(mapsize);
for (i = 0; i < 256; i += 1) {
map[i] = map[256+i] = map[2*256+i] = i;
}
mapsize /= 3;
mapred= map;
mapgreen= mapred + mapsize;
mapblue= mapgreen + mapsize;
if (image->rgb.size == 0)
newRGBMapData(&image->rgb, mapsize);
for (i= 0; i < mapsize; i++) {
*(image->rgb.red + i)= (*(mapred++) << 8);
*(image->rgb.green + i)= (*(mapgreen++) << 8);
*(image->rgb.blue + i)= (*(mapblue++) << 8);
}
lfree(map);
image->rgb.used= mapsize;
/*
* Finally start the image data
*/
lineptr = image->data;
if ( !(zf=zopen(fullname))) {
perror(fullname);
zclose(zf);
exit(1);
}
if ( verbose ){
zread(zf,lineptr,LBLSIZE); /* dump label */
vicarHeader(lineptr);
}
else
zread(zf,lineptr,LBLSIZE); /* skip label */
size = image->width * image->height;
if (zread(zf,lineptr,size) != size)
fprintf(stderr, "%s: Warning, image data was missing\n", fullname);
zclose(zf);
return(image);
}
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