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/*
* $Id: gplot2.cxx,v 4.2 2004/06/17 17:34:18 hut66au Exp $
*
* Imview, the portable image analysis application
* http://www.cmis.csiro.au/Hugues.Talbot/imview
* ----------------------------------------------------------
*
* Imview is an attempt to provide an image display application
* suitable for professional image analysis. It was started in
* 1997 and is mostly the result of the efforts of Hugues Talbot,
* Image Analysis Project, CSIRO Mathematical and Information
* Sciences, with help from others (see the CREDITS files for
* more information)
*
* Imview is Copyrighted (C) 1997-2001 by Hugues Talbot and was
* supported in parts by the Australian Commonwealth Science and
* Industry Research Organisation. Please see the COPYRIGHT file
* for full details. Imview also includes the contributions of
* many others. Please see the CREDITS file for full details.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
* */
/*
ImView's interface to gnuplot, after similar work for EiC by
Ed Breen
Example usages:
#include gplot2.c
plot_t *p1 = openplot("p1");
send2plot(p1,"plot sin(x) + tan(x)");
closeplot(p1);
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdarg.h>
#include "gplot2.hxx"
#include "imview.hxx"
#include "machine.hxx"
using std::list;
static list <char *> gplottmpnamelist;
void Send_2_plot_(plot_t *p, char * fmt, ...)
{
char *buff;
int stringlength, allocatelength;
va_list args;
stringlength = strlen(fmt)*2;
allocatelength = (512 > stringlength) ? 512:stringlength;
buff = (char *)malloc(allocatelength); /* fmt string can be VERY long... */
im_va_start(args,fmt);
vsprintf(buff,fmt,args);
fputs(buff,getPlotFile(p));
fputc('\n',getPlotFile(p));
free(buff);
va_end(args);
}
void plotDoubles(double *hist, int n,plot_t *p, bool smooth)
{
int i;
double min,max;
FILE *fp;
fp = fopen(p->fname,"w");
min = max = *hist;
for(i=0;i<n;++i,++hist) {
if(*hist < min)
min = *hist;
if(*hist > max)
max = *hist;
fprintf(fp,"%d %g\n",i,*hist);
}
fclose(fp);
Send_2_plot_(p,"plot [0:%d] '%s' %s notitle with lines",
n-1, p->fname,
smooth ? "smooth csplines":"" );
}
static void addToUnlinkList(char *tmpname)
{
dbgprintf("Adding %s to the list of files to remove later\n", tmpname);
gplottmpnamelist.push_back(tmpname);
}
static void unlinkAllTmpFiles(void)
{
while (!gplottmpnamelist.empty()) {
char *&nameref = gplottmpnamelist.back();
remove(nameref);
dbgprintf("Removing %s\n", nameref);
// this name had been allocated
free(nameref);
gplottmpnamelist.pop_back();
}
}
// Use this in conjunction with dataMPlot
char *writeDoubleVector(double *vec, int n)
{
char * tmpName = tempnam(NULL, "FlIm"); // this allocates a new area
FILE *fp = tmpfile();
int i;
fp = fopen(tmpName,"w");
if(!fp)
return NULL;
for(i=0;i<n;++i)
fprintf(fp,"%d %g\n",i,vec[i]);
fclose(fp);
addToUnlinkList(tmpName);
return tmpName;
}
// allows multiple plots on the same plot
void dataMPlot(plot_t *p,
char * (*f)(...), /* return the name of the file where data is stored */
int nv, /* number of vectors in vecs */
void **vecs, /* array of vectors */
char **labels, /* arrays of labels (may not be NULL) */
int *lens, /* array of lengths to vecs */
bool smooth) /* uses splines or straight lines */
{
/* Assumes that plot title, line style etc have been
handled elsewhere.
*/
char *buff;
char buf[256];
int blen = 256;
char **names = (char **) malloc(nv * sizeof(char*));
char *tmp;
int i,k, tl = 0;
for(i=0;i<nv;i++) {
tmp = f(vecs[i],lens[i]);
k = strlen(tmp);
names[i] = (char *)malloc(k+1);
tl += k + 5;
strcpy(names[i],tmp);
}
buff = (char *)malloc(blen+tl);
sprintf(buff,"plot '%s' title '%s'",names[0], labels[0]);
free(names[0]);
for(i=1;i<nv; i++) {
sprintf(buf,",'%s' title '%s'",names[i], labels[i]);
strcat(buff,buf);
free(names[i]);
}
send2plot(p,buff);
free(names);
free(buff);
}
void * closePlot(plot_t *p)
{
if(p != NULL) {
fflush(p->fp);
pclose(p->fp);
remove(p->fname);
free(p);
}
unlinkAllTmpFiles();
return NULL;
}
plot_t * openPlot(char * plotname)
{
plot_t * plot = (plot_t*)calloc(sizeof(plot_t),1);
if(plot != NULL) {
if ((plot->fp = popen("gnuplot","w")) != 0) {
setvbuf(plot->fp,NULL,_IONBF,0); // unbuffered I/O
if(plotname != NULL) {
Send_2_plot_(plot,"set title '%s'",plotname);
}
tmpnam(plot->fname);
} else {
free(plot);
plot = NULL;
}
}
return plot;
}
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