Method: Magick::Image#liquid_rescale

Defined in:
ext/RMagick/rmimage.c

#liquid_rescale(*args) ⇒ Object

Call the LiquidRescaleImage API.

Ruby usage:

- @verbatim Image#liquid_rescale(columns, rows) @endverbatim
- @verbatim Image#liquid_rescale(columns, rows, delta_x) @endverbatim
- @verbatim Image#liquid_rescale(columns, rows, delta_x, rigidity) @endverbatim

Notes:

- Default delta_x is 0.0
- Default rigidity is 0.0

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 7908

VALUE
Image_liquid_rescale(int argc, VALUE *argv, VALUE self)
{
#if defined(HAVE_LIQUIDRESCALEIMAGE)
    Image *image, *new_image;
    unsigned long cols, rows;
    double delta_x = 0.0;
    double rigidity = 0.0;
    ExceptionInfo exception;

    image = rm_check_destroyed(self);

    switch (argc)
    {
        case 4:
            rigidity = NUM2DBL(argv[3]);
        case 3:
            delta_x = NUM2DBL(argv[2]);
        case 2:
            rows = NUM2ULONG(argv[1]);
            cols = NUM2ULONG(argv[0]);
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 2 to 4)", argc);
            break;
    }

    GetExceptionInfo(&exception);
    new_image = LiquidRescaleImage(image, cols, rows, delta_x, rigidity, &exception);
    rm_check_exception(&exception, new_image, DestroyOnError);
    DestroyExceptionInfo(&exception);
    rm_ensure_result(new_image);

    return rm_image_new(new_image);
#else
    argc = argc;    // defeat "unused parameter" messages
    argv = argv;
    self = self;
    rm_not_implemented();
    return(VALUE)0;
#endif
}