Module: ExifGeoTag

Defined in:
lib/exif_geo_tag.rb,
lib/exif_geo_tag/version.rb,
ext/exif_geo_tag.c

Constant Summary collapse

VERSION = 
'1.0.2'.freeze

Class Method Summary collapse

Class Method Details

.write_tag(file_path, new_values) ⇒ Object 



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# File 'ext/exif_geo_tag.c', line 922

static VALUE egt_write_tag(VALUE self, VALUE file_path, VALUE new_values)
{
    ExifData *exif_data;
    ExifMem *mem;
    VALUE prev_values;
    (void)self;

    Check_Type(file_path, T_STRING);
    Check_Type(new_values, T_HASH);

    mem = exif_mem_new_default();
    exif_data = egt_exif_data_new_from_file(mem, RSTRING_PTR(file_path));
    if (!exif_data) {
        rb_raise(rb_eArgError, "file not readable or no EXIF data in file");
    }

    prev_values = rb_hash_new();

    egt_parse_virtual_fields(new_values);
#define X(e, i) egt_handle_tag(mem, exif_data, e, prev_values, new_values, egt_sym_##i);
    TAG_MAPPING(X)
#undef X
    egt_generate_virtual_fields(prev_values);

    if (rb_hash_size(new_values) > 0) {
        egt_save_exif_to_file(exif_data, RSTRING_PTR(file_path));
    }

    exif_data_free(exif_data);
    exif_mem_unref(mem);
    return prev_values;
}