dspl/gnuplot__create_8c_source.html

/*

* Copyright (c) 2015-2022 Sergey Bakhurin

* Digital Signal Processing Library [http://dsplib.org]

*

* This file is part of DSPL.

*

* 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 3 of the License, or

* (at your option) any later version.

*

* DSPL 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 Foobar.    If not, see <http://www.gnu.org/licenses/>.

*/

#include <stdio.h>

#include <unistd.h>

#include "dspl.h"


#define GNUPLOT_NO     1

#define GNUPLOT_WIN    3

#define GNUPLOT_PNG    4


#ifdef DOXYGEN_ENGLISH


#endif

#ifdef DOXYGEN_RUSSIAN


#endif

int DSPL_API gnuplot_create(int argc, char* argv[],

                            int w, int h, char* fn_png,

                            void** hplot)

{

    FILE* hp;

    char    str[1024] = {0};

    int state = 0;

    int err;

    if(argc>1 && !argv)

        return ERROR_ARG_PARAM;


    if(argc < 2)

        state = GNUPLOT_WIN;

    else

    {

        if(!strcmp(argv[1], "--noplot"))

            state = GNUPLOT_NO;

        if(!strcmp(argv[1], "--plotwin"))

            state = GNUPLOT_WIN;

        if(!strcmp(argv[1], "--plotpng"))

            state = GNUPLOT_PNG;

    }

    if(!hplot)

        return ERROR_PTR;


    switch(state)

    {

        case GNUPLOT_NO:

            hp = NULL;


            err = RES_OK;

            break;


        case GNUPLOT_WIN:

            hp = popen("gnuplot -p",    "w");

            if(!hp)

                return ERROR_GNUPLOT_CREATE;

            memset(str, 0, 1024*sizeof(char));

            sprintf(str, "set terminal wxt size %d,%d", w,h);

            gnuplot_cmd(hp, str);


            err = RES_OK;

            break;


        case GNUPLOT_PNG:

            if(!fn_png)

                return ERROR_GNUPLOT_FNPNG;

            hp = popen("gnuplot -p",    "w");

            if(!hp)

                return ERROR_GNUPLOT_CREATE;

            memset(str, 0, 1024*sizeof(char));

            sprintf(str, "set terminal pngcairo size %d,%d\

                          enhanced font 'Verdana,8'", w, h);


            gnuplot_cmd(hp, str);


            memset(str, 0, 1024*sizeof(char));

            sprintf(str, "set output '%s'", fn_png);

            gnuplot_cmd(hp, str);

            err = RES_OK;

            break;


        default:

            err = ERROR_GNUPLOT_TERM;

            hp = NULL;

    }

    *hplot = hp;

    return err;

}