lensfun: example.c

# example.c

Sample program demonstrating basic usage of C API.

    /*
        A simple example of library usage from plain C
    */

    #include "lensfun.h"
    #include <stdio.h>
    #include <locale.h>
    #include <glib.h>

    int main ()
    {
        int i, j;
        const struct lfMount *const *mounts;
        const struct lfCamera *const *cameras;
        const struct lfLens *const *lenses;
        struct lfDatabase *ldb;
        lfError e;

        /* Initialize locale in order to get translated names */
        setlocale (LC_ALL, "");

        ldb = lf_db_new ();
        if (!ldb)
        {
            fprintf (stderr, "Failed to create database\n");
            return -1;
        }

        g_print ("HomeDataDir: %s\n", ldb->HomeDataDir);

        lf_db_load (ldb);

        g_print ("< --------------- < Mounts > --------------- >\n");
        mounts = lf_db_get_mounts (ldb);
        for (i = 0; mounts [i]; i++)
        {
            g_print ("Mount: %s\n", lf_mlstr_get (mounts [i]->Name));
            if (mounts [i]->Compat)
                for (j = 0; mounts [i]->Compat [j]; j++)
                    g_print ("\tCompat: %s\n", mounts [i]->Compat [j]);
        }

        g_print ("< --------------- < Cameras > --------------- >\n");
        cameras = lf_db_get_cameras (ldb);
        for (i = 0; cameras [i]; i++)
        {
            g_print ("Camera: %s / %s %s%s%s\n",
                lf_mlstr_get (cameras [i]->Maker),
                lf_mlstr_get (cameras [i]->Model),
                cameras [i]->Variant ? "(" : "",
                cameras [i]->Variant ? lf_mlstr_get (cameras [i]->Variant) : "",
                cameras [i]->Variant ? ")" : "");
            g_print ("\tMount: %s\n", lf_db_mount_name (ldb, cameras [i]->Mount));
            g_print ("\tCrop factor: %g\n", cameras [i]->CropFactor);
        }

        g_print ("< --------------- < Lenses > --------------- >\n");
        lenses = lf_db_get_lenses (ldb);
        for (i = 0; lenses [i]; i++)
        {
            g_print ("Lens: %s / %s\n",
                lf_mlstr_get (lenses [i]->Maker),
                lf_mlstr_get (lenses [i]->Model));
            g_print ("\tCrop factor: %g\n", lenses [i]->CropFactor);
            g_print ("\tFocal: %g-%g\n", lenses [i]->MinFocal, lenses [i]->MaxFocal);
            g_print ("\tAperture: %g-%g\n", lenses [i]->MinAperture, lenses [i]->MaxAperture);
            g_print ("\tCenter: %g,%g\n", lenses [i]->CenterX, lenses [i]->CenterY);
            g_print ("\tCCI: %g/%g/%g\n", lenses [i]->RedCCI, lenses [i]->GreenCCI, lenses [i]->BlueCCI);
            if (lenses [i]->Mounts)
                for (j = 0; lenses [i]->Mounts [j]; j++)
                    g_print ("\tMount: %s\n", lf_db_mount_name (ldb, lenses [i]->Mounts [j]));
        }

        g_print ("< ---< Saving database into one big file >--- >\n");
        e = lf_db_save_file (ldb, "example-big.xml", mounts, cameras, lenses);
        if (e != LF_NO_ERROR)
            fprintf (stderr, "Failed writing to file, error code %d\n", e);

        lf_db_destroy (ldb);
        return 0;
    }