Method: Magick::Image#composite_mathematics

Defined in:
ext/RMagick/rmimage.c

#composite_mathematics(*args) ⇒ Object

Composite using MathematicsCompositeOp.

Ruby usage:

- @verbatim img.composite_mathematics(comp_img, A, B, C, D, gravity) @endverbatim
- @verbatim img.composite_mathematics(comp_img, A, B, C, D, x_off, y_off) @endverbatim
- @verbatim img.composite_mathematics(comp_img, A, B, C, D, gravity, x_off, y_off) @endverbatim

Notes:

- Default x_off is 0
- Default y_off is 0
- New in ImageMagick 6.5.4-3.

Parameters:

  • argc —

    number of input arguments

  • argv —

    array of input arguments

  • self —

    this object

Returns:

  • a new image

[View source]

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# File 'ext/RMagick/rmimage.c', line 3549

VALUE
Image_composite_mathematics(int argc, VALUE *argv, VALUE self)
{
#if defined(HAVE_ENUM_MATHEMATICSCOMPOSITEOP)
    Image *composite_image;
    VALUE args[5];
    signed long x_off = 0L;
    signed long y_off = 0L;
    GravityType gravity = NorthWestGravity;
    char compose_args[200];

    rm_check_destroyed(self);
    if (argc > 0)
    {
        composite_image = rm_check_destroyed(rm_cur_image(argv[0]));
    }

    switch (argc)
    {
        case 8:
            VALUE_TO_ENUM(argv[5], gravity, GravityType);
            x_off = NUM2LONG(argv[6]);
            y_off = NUM2LONG(argv[7]);
            break;
        case 7:
            x_off = NUM2LONG(argv[5]);
            y_off = NUM2LONG(argv[6]);
            break;
        case 6:
            VALUE_TO_ENUM(argv[5], gravity, GravityType);
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (got %d, expected 6 to 8)", argc);
            break;
    }


    (void) sprintf(compose_args, "%-.16g,%-.16g,%-.16g,%-.16g", NUM2DBL(argv[1]), NUM2DBL(argv[2]), NUM2DBL(argv[3]), NUM2DBL(argv[4]));
    SetImageArtifact(composite_image,"compose:args", compose_args);

    // Call composite(False, gravity, x_off, y_off, MathematicsCompositeOp, DefaultChannels)
    args[0] = argv[0];
    args[1] = GravityType_new(gravity);
    args[2] = LONG2FIX(x_off);
    args[3] = LONG2FIX(y_off);
    args[4] = CompositeOperator_new(MathematicsCompositeOp);

    return composite(False, 5, args, self, DefaultChannels);

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