/***************************************************************
pdliisdisplay.c
****************************************************************/
/* Redefine iis_error to use Perl's croak() */
void iis_error( char* error1, char*error2 ) {
croak (error1,error2);
}
/*****************************************************/
/* Rest of the subroutines are identical to libiis.c v1.0 */
/******************* iis_cur ************************/
/* Return cursor position and character typed */
void iis_cur(float*x, float*y, char* ch) {
unsigned short hdr[8];
short buf[SZ_WCSTEXT];
int nbytes,wcs;
/* Send read request */
hdr[TRANSFER_ID] = PDL_IIS_IREAD;
hdr[THING_COUNT] = 0;
hdr[SUB_UNIT] = IMCURSOR;
hdr[CHECK_SUM] = 0;
hdr[X_REGISTER] = 0;
hdr[Y_REGISTER] = 0;
hdr[Z_REGISTER] = 0;
hdr[T_REGISTER] = 0;
iis_checksum(hdr);
iis_write((char*)hdr, 8*sizeof(short));
/* Read however many bytes it send in this case */
if ((nbytes = read (iispipe_i, buf, SZ_WCSTEXT)) <= 0)
iis_error ("iis_cur: cannot read IIS pipe\n","");
if (sscanf ((char*)buf, "%f %f %d %c", x, y, &wcs, ch) != 4)
iis_error ("iis_cur: can't parse '%s'\n", (char*)buf);
}
/******************* iis_drawcirc *******************/
/* Draw a circle on the image display at a given position */
void iis_drawcirc(float xcen, float ycen, float radius, int colour, int frame) {
unsigned short hdr[8];
unsigned char *data;
int i,j,y;
int ymin,ymax,ntrans,nlines,nbytes;
float xcen2,ycen2,dd;
char wcsbuf[SZ_WCSTEXT];
float xx, yx, xy, yy, xo, yo; /* wcs matrix values */
float xx2, yx2, xy2, yy2, xo2, yo2; /* wcs inverse matrix values */
char label[1024]; /* wcs file title */
int w_type; /* wcs scaling code */
float low, high; /* wcs scaling limits */
int chan;
float rr;
chan = iis_chan(frame);
/* Send WCS read request */
hdr[TRANSFER_ID] = -PDL_IIS_IREAD;
hdr[THING_COUNT] = 0;
hdr[SUB_UNIT] = WCS;
hdr[CHECK_SUM] = 0;
hdr[X_REGISTER] = 0;
hdr[Y_REGISTER] = 0;
hdr[Z_REGISTER] = chan;
hdr[T_REGISTER] = 0;
iis_checksum(hdr);
iis_write((char*)hdr, 8*sizeof(short));
iis_read ((char*)wcsbuf, SZ_WCSTEXT); /* Get WCS data */
sscanf(wcsbuf, "%[^\n]\n%f%f%f%f%f%f%f%f%d", label,
&xx, &yx, &xy, &yy, &xo, &yo, &low, &high, &w_type);
/* Invert transform (I don't care about non-square coord systems! */
xcen2 = (xcen-xo)/xx;
ycen2 = frameY - (ycen-yo)/yy - 1;
/* Correct scale factor - OK for square images don't want to
draw ellipses for non-square ones so take geometric mean */
rr = radius / sqrt(iis_abs(xx*yy));
/* Transfer limits (with buffer to allow for edge effects) */
ymin = ycen2-rr-2;
if (ymin<0)
ymin=0;
ymax = ycen2+rr+2;
if (ymax>=frameY)
ymax=frameY-1;
/* Work out how many lines to transfer at a go */
ntrans = RBUFFSZ/frameX;
if (ntrans<1)
ntrans = 1;
/* Allocate buffer for data transfers */
data = (unsigned char*) calloc(ntrans*frameX, sizeof(unsigned char));
if (data==NULL)
iis_error("iis_drawcirc: out of memory for buffer","");
/* Loop over blocks */
for (y = ymin; y < ymax; y+=ntrans) {
nlines = ntrans; /* Number of lines to transfer */
if (y+ntrans>ymax)
nlines = ymax - y;
/* Read data */
hdr[TRANSFER_ID] = -PDL_IIS_IREAD | PACKED | BLOCKXFER;
hdr[THING_COUNT] = -nlines*frameX;
hdr[SUB_UNIT] = REFRESH;
hdr[CHECK_SUM] = 0;
hdr[X_REGISTER] = ADVXONTC;
hdr[Y_REGISTER] = ADVYONXOV+frameY-y-nlines;
hdr[Z_REGISTER] = chan;
hdr[T_REGISTER] = ALLBITPL;
iis_checksum(hdr);
iis_write((char*)hdr, 8*sizeof(short));
iis_read((char*)data, nlines*frameX*sizeof(char));
/* Write data */
hdr[TRANSFER_ID] = PDL_IIS_IWRITE | PACKED | BLOCKXFER;
hdr[THING_COUNT] = -nlines*frameX;
hdr[SUB_UNIT] = REFRESH;
hdr[CHECK_SUM] = 0;
hdr[X_REGISTER] = ADVXONTC;
hdr[Y_REGISTER] = ADVYONXOV+frameY-y-nlines;
hdr[Z_REGISTER] = chan;
hdr[T_REGISTER] = ALLBITPL;
iis_checksum(hdr);
iis_write((char*)hdr, 8*sizeof(short));
/* Change Data - draw in i and j to fill circle gaps via symmetry */
for (j=0; j<nlines; j++) {
dd = rr*rr - (y+j-ycen2)*(y+j-ycen2);
if (dd>=0) {
dd = sqrt(dd);
i = iis_round( (float)xcen2 - dd );
if (i>=0 && i<frameX)
data[ (nlines-j-1)*frameX + i ] = colour;
i = iis_round( (float)xcen2 + dd );
if (i>=0 && i<frameX)
data[ (nlines-j-1)*frameX + i ] = colour;
}
}
for (i=0; i<frameX; i++) {
dd = rr*rr - (i-xcen2)*(i-xcen2);
if (dd>=0) {
dd = sqrt(dd);
j = iis_round( (float)ycen2 - (float)y - dd );
if (j>=0 && j<nlines)
data[ (nlines-j-1)*frameX + i ] = colour;
j = iis_round( (float)ycen2 - (float)y + dd );
if (j>=0 && j<nlines)
data[ (nlines-j-1)*frameX + i ] = colour;
}
}
iis_write((char*)data, nlines*frameX*sizeof(char));
}
free(data);
}
/******************* iis_open ****************/
/*
Open IIS connection - if inpipe or outpipe are "" default
pipes are searched for in the environment variable $IMTDEV,
then in the directories (with the usual filenames) $HOME/iraf/dev,
$HOME/dev, and finally /dev.
Note the frame buffer configuration number and dimensions
must be suppled by hand - life is too short to write
imtoolrc parsing code in C! If these don't match those in the
appropriate imtoolrc file problems will occur.
*/
void iis_open(char* inpipe, char* outpipe, int fb, int fbx, int fby) {
FILE *syspipe;
char *home, *imtdev, *tok=NULL;
char iname[STRSIZE],oname[STRSIZE];
int i,j;
home = getenv("HOME");
imtdev = getenv("IMTDEV");
if (imtdev != NULL) /* Start parsing IMTDEV environment variable */
tok = strtok(imtdev,":");
if (tok!=NULL && strcmp(tok,"fifo")!=0) /* Ignore if not fifo */
tok = NULL;
/* Get input fifo name */
if (strcmp(inpipe,"")==0) {
if (tok!=NULL) { /* Check next bit of IMTDEV */
tok = strtok(NULL,":");
if (tok != NULL) {
strncpy(iname,tok,STRSIZE);
goto gotin;
}
}
/* Else look in standard places */
strncpy(iname,home,STRSIZE); strncat(iname,"/iraf/dev/imt1i",STRSIZE);
if (!access(iname,F_OK))
goto gotin;
strncpy(iname,home,STRSIZE); strncat(iname,"/dev/imt1i",STRSIZE);
if (!access(iname,F_OK))
goto gotin;
strncpy(iname,"/dev/imt1i",STRSIZE);
if (!access(iname,F_OK))
goto gotin;
}
else {
strncpy(iname,inpipe,STRSIZE); /* Use supplied arg */
goto gotin;
}
iis_error("Unable to locate input FIFO in any of $HOME/dev/imt1i or %s",
"$HOME/dev/imt1i or /dev/imt1i\n");
gotin:
if (strcmp(outpipe,"")==0) { /* Get output fifo name */
if (tok!=NULL) { /* Check next bit of IMTDEV */
tok = strtok(NULL,":");
if (tok != NULL) {
strncpy(oname,tok,STRSIZE);
goto gotout;
}
}
/* Else look in standard places */
strncpy(oname,home,STRSIZE); strncat(oname,"/iraf/dev/imt1o",STRSIZE);
if (!access(oname,F_OK))
goto gotout;
strncpy(oname,home,STRSIZE); strncat(oname,"/dev/imt1o",STRSIZE);
if (!access(oname,F_OK))
goto gotout;
strncpy(oname,"/dev/imt1o",STRSIZE);
if (!access(oname,F_OK))
goto gotout;
}
else {
strncpy(oname,outpipe,STRSIZE); /* Use supplied arg */
goto gotout;
}
iis_error("Unable to locate output FIFO in any of $HOME/iraf/dev/imt1o or %s",
"$HOME/dev/imt1o or /dev/imt1o\n");
gotout:
/*
Open the output fifo. We have to open it ourselves first as a client to
get around the fifo open-no-client error.
*/
if ((iispipe_i = open (oname, O_RDONLY | O_NONBLOCK)) != -1) {
if ((iispipe_o = open (oname, O_WRONLY | O_NONBLOCK)) != -1) {
fcntl (iispipe_o, F_SETFL, O_WRONLY);
} else
iis_error("iis_open: cannot open IIS output pipe %s\n",oname);
close (iispipe_i);
} else
iis_error("iis_open: cannot open IIS output pipe %s\n",oname);
/* Open the input fifo */
if ((iispipe_i = open (iname, O_RDONLY | O_NONBLOCK)) != -1) {
/* Clear input for reading. */
fcntl (iispipe_i, F_SETFL, O_RDONLY);
} else
iis_error("iis_open: cannot open IIS input pipe %s\n",iname);
fbconfig = fb; frameX = fbx; frameY = fby; /* Frame buffer globals */
}
/******************* iis_close ****************/
/* Close the IIS connection */
void iis_close() {
close(iispipe_o);
close(iispipe_i);
}
/******************* Private routines ****************/
/* write to pipe */
void iis_write (char* buf, int size) {
int n = 0;
int total = 0;
while (total < size) {
n = write (iispipe_o, buf, size - total);
if (n <= 0)
iis_error ("iis_write: can't write to pipe\n","");
total += n;
}
}
/* read from pipe */
void iis_read (char* buf, int size) {
int n = 0;
int total = 0;
while (total < size) {
n = read (iispipe_i, buf, size - total);
if (n <= 0)
iis_error ("iis_read: can't read from pipe\n","");
total += n;
}
}
void iis_checksum ( unsigned short *hdr ) {
int indx;
int checksum = 0;
for (indx = 0; indx < 8; indx++) {
checksum += hdr[indx];
}
hdr[CHECK_SUM] = CHECKSUMVAL - (unsigned short) checksum;
}
/* Return the channel number associated with a display frame */
int iis_chan(int frame) {
int chan[5];
chan[1]=CHAN1; chan[2]=CHAN2; chan[3]=CHAN3; chan[4]=CHAN4;
if (frame>0 && frame<5)
return chan[frame];
else
iis_error("iis_display: invalid frame number, must be 1-4\n","");
}
/* Round to nearest int symmetrically about zero */
int iis_round ( float i ) {
if (i>=0)
return (int) (i+0.5);
else
return -( (int)(0.5-i) );
}
float iis_abs(float x) {
if (x<0)
return (-x);
else
return x;
}