row.c
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/*
* putrow, getrow -
*
* Paul Haeberli - 1984
*
*/
#include <stdio.h>
#include "image.h"
int putrow(IMAGE *image, unsigned short *buffer,
unsigned int y, unsigned int z)
{
register unsigned short *sptr;
register unsigned char *cptr;
register unsigned int x;
register unsigned int min, max;
register int cnt;
if( !(image->flags & (_IORW|_IOWRT)) )
return -1;
if(image->dim<3)
z = 0;
if(image->dim<2)
y = 0;
if(ISVERBATIM(image->type)) {
switch(BPP(image->type)) {
case 1:
min = image->min;
max = image->max;
cptr = (unsigned char *)image->tmpbuf;
sptr = buffer;
for(x=image->xsize; x--;) {
*cptr = *sptr++;
if (*cptr > max) max = *cptr;
if (*cptr < min) min = *cptr;
cptr++;
}
image->min = min;
image->max = max;
img_seek(image,y,z);
cnt = image->xsize;
if (img_write(image,(char *)(image->tmpbuf),cnt) != cnt) {
i_errhdlr("putrow: error on write of row\n");
return -1;
} else
return cnt;
/* NOTREACHED */
case 2:
min = image->min;
max = image->max;
sptr = buffer;
for(x=image->xsize; x--;) {
if (*sptr > max) max = *sptr;
if (*sptr < min) min = *sptr;
sptr++;
}
image->min = min;
image->max = max;
img_seek(image,y,z);
cnt = image->xsize<<1;
if(image->dorev)
cvtshorts(buffer,cnt);
if (img_write(image,(char *)(buffer),cnt) != cnt) {
if(image->dorev)
cvtshorts(buffer,cnt);
i_errhdlr("putrow: error on write of row\n");
return -1;
} else {
if(image->dorev)
cvtshorts(buffer,cnt);
return image->xsize;
}
/* NOTREACHED */
default:
i_errhdlr("putrow: weird bpp\n");
}
} else if(ISRLE(image->type)) {
switch(BPP(image->type)) {
case 1:
min = image->min;
max = image->max;
sptr = buffer;
for(x=image->xsize; x--;) {
if (*sptr > max) max = *sptr;
if (*sptr < min) min = *sptr;
sptr++;
}
image->min = min;
image->max = max;
cnt = img_rle_compact(buffer,2,image->tmpbuf,1,image->xsize);
img_setrowsize(image,cnt,y,z);
img_seek(image,y,z);
if (img_write(image,(char *)(image->tmpbuf),cnt) != cnt) {
i_errhdlr("putrow: error on write of row\n");
return -1;
} else
return image->xsize;
/* NOTREACHED */
case 2:
min = image->min;
max = image->max;
sptr = buffer;
for(x=image->xsize; x--;) {
if (*sptr > max) max = *sptr;
if (*sptr < min) min = *sptr;
sptr++;
}
image->min = min;
image->max = max;
cnt = img_rle_compact(buffer,2,image->tmpbuf,2,image->xsize);
cnt <<= 1;
img_setrowsize(image,cnt,y,z);
img_seek(image,y,z);
if(image->dorev)
cvtshorts(image->tmpbuf,cnt);
if (img_write(image,(char *)(image->tmpbuf),cnt) != cnt) {
if(image->dorev)
cvtshorts(image->tmpbuf,cnt);
i_errhdlr("putrow: error on write of row\n");
return -1;
} else {
if(image->dorev)
cvtshorts(image->tmpbuf,cnt);
return image->xsize;
}
/* NOTREACHED */
default:
i_errhdlr("putrow: weird bpp\n");
}
} else
i_errhdlr("putrow: weird image type\n");
return(-1);
}
int getrow(IMAGE *image, unsigned short *buffer,
unsigned int y, unsigned int z)
{
register short i;
register unsigned char *cptr;
register unsigned short *sptr;
register short cnt;
if( !(image->flags & (_IORW|_IOREAD)) )
return -1;
if(image->dim<3)
z = 0;
if(image->dim<2)
y = 0;
img_seek(image, y, z);
if(ISVERBATIM(image->type)) {
switch(BPP(image->type)) {
case 1:
if (img_read(image,(char *)image->tmpbuf,image->xsize)
!= image->xsize) {
i_errhdlr("getrow: error on read of row\n");
return -1;
} else {
cptr = (unsigned char *)image->tmpbuf;
sptr = buffer;
for(i=image->xsize; i--;)
*sptr++ = *cptr++;
}
return image->xsize;
/* NOTREACHED */
case 2:
cnt = image->xsize<<1;
if (img_read(image,(char *)(buffer),cnt) != cnt) {
i_errhdlr("getrow: error on read of row\n");
return -1;
} else {
if(image->dorev)
cvtshorts(buffer,cnt);
return image->xsize;
}
/* NOTREACHED */
default:
i_errhdlr("getrow: weird bpp\n");
break;
}
} else if(ISRLE(image->type)) {
switch(BPP(image->type)) {
case 1:
if( (cnt = img_getrowsize(image)) == -1 )
return -1;
if( img_read(image,(char *)(image->tmpbuf),cnt) != cnt ) {
i_errhdlr("getrow: error on read of row\n");
return -1;
} else {
img_rle_expand(image->tmpbuf,1,buffer,2);
return image->xsize;
}
/* NOTREACHED */
case 2:
if( (cnt = img_getrowsize(image)) == -1 )
return -1;
if( cnt != img_read(image,(char *)(image->tmpbuf),cnt) ) {
i_errhdlr("getrow: error on read of row\n");
return -1;
} else {
if(image->dorev)
cvtshorts(image->tmpbuf,cnt);
img_rle_expand(image->tmpbuf,2,buffer,2);
return image->xsize;
}
/* NOTREACHED */
default:
i_errhdlr("getrow: weird bpp\n");
break;
}
} else
i_errhdlr("getrow: weird image type\n");
return 0;
}