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/* +-------------------------------------------------------------------+ */
/* | Copyright 1993, David Koblas (koblas@netcom.com) | */
/* | | */
/* | Permission to use, copy, modify, and to distribute this software | */
/* | and its documentation for any purpose is hereby granted without | */
/* | fee, provided that the above copyright notice appear in all | */
/* | copies and that both that copyright notice and this permission | */
/* | notice appear in supporting documentation. There is no | */
/* | representations about the suitability of this software for | */
/* | any purpose. this software is provided "as is" without express | */
/* | or implied warranty. | */
/* | | */
/* +-------------------------------------------------------------------+ */
/* $Id: readWriteSGI.c,v 1.2 1996/04/19 09:30:38 torsten Exp $ */
#include <stdio.h>
#include <gl/image.h>
#include <sys/fcntl.h>
#include "image.h"
int WriteSGI(char *file, Image * image)
{
IMAGE *o;
short *rbuf = NULL, *gbuf = NULL, *bbuf = NULL;
int x, y;
unsigned char *ip;
int d = 3;
if (image->isGrey)
d = 1;
if ((o = iopen(file, "w", RLE(1), 3, image->width, image->height, d)) == NULL)
return 1;
if (d == 1) {
rbuf = (short *) malloc(image->width * sizeof(short));
} else {
rbuf = (short *) malloc(image->width * sizeof(short));
gbuf = (short *) malloc(image->width * sizeof(short));
bbuf = (short *) malloc(image->width * sizeof(short));
}
for (y = 0; y < image->height; y++) {
for (x = 0; x < image->width; x++) {
ip = ImagePixel(image, x, y);
rbuf[x] = ip[0];
if (d != 1) {
gbuf[x] = ip[1];
bbuf[x] = ip[2];
}
}
if (rbuf != NULL)
putrow(o, rbuf, image->height - y - 1, 0);
if (gbuf != NULL)
putrow(o, gbuf, image->height - y - 1, 1);
if (bbuf != NULL)
putrow(o, bbuf, image->height - y - 1, 2);
}
iclose(o);
if (rbuf != NULL)
free(rbuf);
if (gbuf != NULL)
free(gbuf);
if (bbuf != NULL)
free(bbuf);
return 0;
}
int TestSGI(char *file)
{
int f = open(file, O_RDONLY);
unsigned short c;
int ret = 0;
if (f < 0)
return 0;
ret = ((read(f, &c, 2) == 2) && c == IMAGIC);
close(f);
return ret;
}
Image *ReadSGI(char *file)
{
Image *image;
IMAGE *in;
short *rbuf, *gbuf, *bbuf;
int x, y;
unsigned char *ip;
if ((in = iopen(file, "r")) == 0)
return NULL;
if (in->zsize == 1)
image = ImageNewGrey(in->xsize, in->ysize);
else
image = ImageNew(in->xsize, in->ysize);
rbuf = (short *) malloc(in->xsize * sizeof(short));
gbuf = bbuf = rbuf;
if (in->zsize != 1) {
gbuf = (short *) malloc(in->xsize * sizeof(short));
bbuf = (short *) malloc(in->xsize * sizeof(short));
}
ip = image->data;
for (y = in->ysize - 1; y >= 0; y--) {
getrow(in, rbuf, y, 0);
if (gbuf != rbuf)
getrow(in, gbuf, y, 1);
if (bbuf != rbuf)
getrow(in, bbuf, y, 2);
for (x = 0; x < in->xsize; x++) {
*ip++ = rbuf[x] & 0xff;
if (in->zsize != 1) {
*ip++ = gbuf[x] & 0xff;
*ip++ = bbuf[x] & 0xff;
}
}
}
free(rbuf);
if (gbuf != rbuf)
free(gbuf);
if (bbuf != rbuf)
free(bbuf);
iclose(in);
return image;
}
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