Method: Magick::Image#blue_shift

Defined in:
ext/RMagick/rmimage.c

#blue_shift(*args) ⇒ Object

Call BlueShiftImage.

Ruby usage:

- @verbatim Image#blue_shift @endverbatim
- @verbatim Image#blue_shift(factor) @endverbatim

Notes:

- Default factor is 1.5

Parameters:

  • argc —

    number of input arguments

  • argv —

    array of input arguments

  • self —

    this object

Returns:

  • a new image


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# File 'ext/RMagick/rmimage.c', line 1720

VALUE
Image_blue_shift(int argc, VALUE *argv, VALUE self)
{
#if defined(HAVE_BLUESHIFTIMAGE)
    Image *image, *new_image;
    double factor = 1.5;
    ExceptionInfo exception;

    image = rm_check_destroyed(self);

    switch (argc)
    {
        case 1:
            factor = NUM2DBL(argv[0]);
        case 0:
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 0 or 1)", argc);
            break;
    }


    GetExceptionInfo(&exception);
    new_image = BlueShiftImage(image, factor, &exception);
    CHECK_EXCEPTION();
    DestroyExceptionInfo(&exception);

    return rm_image_new(new_image);
#else
    rm_not_implemented();
    return (VALUE)0;
    argc = argc;
    argv = argv;
    self = self;
#endif
}