Method: Magick::Image#format=

Defined in:
ext/RMagick/rmimage.cpp

#format=(magick) ⇒ String

Set the image encoding format. For example, “GIF” or “PNG”.

Parameters:

  • magick (String) —

    the encoding format

Returns:

  • (String) —

    the given value



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# File 'ext/RMagick/rmimage.cpp', line 7170

VALUE
Image_format_eq(VALUE self, VALUE magick)
{
    Image *image;
    const MagickInfo *m;
    char *mgk;
    ExceptionInfo *exception;

    image = rm_check_frozen(self);

    mgk = StringValueCStr(magick);

    exception = AcquireExceptionInfo();
    m = GetMagickInfo(mgk, exception);
    CHECK_EXCEPTION();

    DestroyExceptionInfo(exception);

    if (!m)
    {
        rb_raise(rb_eArgError, "unknown format: %s", mgk);
    }


    strlcpy(image->magick, m->name, sizeof(image->magick));
    return magick;
}