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/*
*
* handle CMU Window Manager (ITC) raster image type
*
* dan lovinger (dl2n+@andrew.cmu.edu) 07.11.90
*
* the format is essentially a byte-reversed sun raster w/o encoding
*
* Copyright 1989 Jim Frost. See included file "copyright.h" for complete
* copyright information.
*/
#include "copyright.h"
#include "image.h"
#include "cmuwmraster.h"
/* SUPPRESS 558 */
int babble(name, headerp)
char *name;
struct cmuwm_header *headerp;
{
printf("%s is a %dx%d %d plane CMU WM raster\n",
name,
memToVal(headerp->width, sizeof(long)),
memToVal(headerp->height, sizeof(long)),
memToVal(headerp->depth, sizeof(short)));
}
int cmuwmIdent(fullname, name)
char *fullname, *name;
{
ZFILE *zf;
struct cmuwm_header header;
int r;
if (!(zf = zopen(fullname)))
{
perror("cmuwmIdent");
return(0);
}
switch (zread(zf, (byte *)&header, sizeof(struct cmuwm_header)))
{
case -1:
perror("cmuwmIdent");
r =0;
break;
case sizeof(struct cmuwm_header):
if (memToVal(header.magic, sizeof(long)) != CMUWM_MAGIC)
{
r = 0;
break;
}
babble(name, &header);
r = 1;
break;
default:
r = 0;
break;
}
zclose(zf);
return r;
}
Image* cmuwmLoad(fullname, name, verbose)
char *fullname, *name;
unsigned int verbose;
{
ZFILE *zf;
struct cmuwm_header header;
Image *image;
int height, width, row, linelen, r;
byte *lineptr;
if (!(zf= zopen(fullname)))
{
perror("cmuwmLoad");
return(NULL);
}
switch (zread(zf, (byte *)&header, sizeof(struct cmuwm_header)))
{
case -1:
perror("cmuwmLoad");
zclose(zf);
exit(1);
case sizeof(struct cmuwm_header):
if (memToVal(header.magic, sizeof(long)) != CMUWM_MAGIC)
{
zclose(zf);
return(NULL);
}
if (verbose) babble(name, &header);
break;
default:
zclose(zf);
return(NULL);
}
if (memToVal(header.depth, sizeof(short)) != 1)
{
fprintf(stderr,"CMU WM raster %s is of depth %d, must be 1",
name,
header.depth);
return(NULL);
}
image = newBitImage(width = memToVal(header.width, sizeof(long)),
height = memToVal(header.height, sizeof(long)));
linelen = (width / 8) + (width % 8 ? 1 : 0);
lineptr = image->data;
for (row = 0; row < height; row++)
{
r = zread(zf, lineptr, linelen);
if (r == -1)
{
perror("cmuwmLoad");
exit(1);
}
if (r != linelen)
{
printf("cmuwmLoad: short raster\n");
exit(1);
}
for (r = 0; r < linelen; r++)
{
lineptr[r] ^= 0xff;
}
lineptr += linelen;
}
zclose(zf);
image->title = dupString(name);
return image;
}
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