Method: Magick::Image#color_flood_fill

Defined in:
ext/RMagick/rmimage.cpp

#color_flood_fill(target_color, fill_color, xv, yv, method) ⇒ Magick::Image

Change the color value of any pixel that matches target_color and is an immediate neighbor.

Parameters:

  • target_color (Magick::Pixel, String) —

    the target color

  • fill_color (Magick::Pixel, String) —

    the color to fill

  • xv (Numeric) —

    the x position

  • yv (Numeric) —

    the y position

  • method (Magick::PaintMethod) —

    the method to call

Returns:

See Also:



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# File 'ext/RMagick/rmimage.cpp', line 3076

VALUE
Image_color_flood_fill(VALUE self, VALUE target_color, VALUE fill_color,
                       VALUE xv, VALUE yv, VALUE method)
{
    Image *image, *new_image;
    PixelColor target;
    DrawInfo *draw_info;
    PixelColor fill;
    long x, y;
    int fill_method;
    MagickPixel target_mpp;
    MagickBooleanType invert;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_destroyed(self);

    // The target and fill args can be either a color name or
    // a Magick::Pixel.
    Color_to_PixelColor(&target, target_color);
    Color_to_PixelColor(&fill, fill_color);

    x = NUM2LONG(xv);
    y = NUM2LONG(yv);
    if ((unsigned long)x > image->columns || (unsigned long)y > image->rows)
    {
        rb_raise(rb_eArgError, "target out of range. %lux%lu given, image is %" RMIuSIZE "x%" RMIuSIZE "",
                 x, y, image->columns, image->rows);
    }

    VALUE_TO_ENUM(method, fill_method, PaintMethod);
    if (!(fill_method == FloodfillMethod || fill_method == FillToBorderMethod))
    {
        rb_raise(rb_eArgError, "paint method must be FloodfillMethod or "
                 "FillToBorderMethod (%d given)", fill_method);
    }

    draw_info = CloneDrawInfo(NULL, NULL);
    if (!draw_info)
    {
        rb_raise(rb_eNoMemError, "not enough memory to continue");
    }
    draw_info->fill = fill;

    new_image = rm_clone_image(image);

    rm_init_magickpixel(new_image, &target_mpp);
    if (fill_method == FillToBorderMethod)
    {
        invert = MagickTrue;
        target_mpp.red   = (MagickRealType) image->border_color.red;
        target_mpp.green = (MagickRealType) image->border_color.green;
        target_mpp.blue  = (MagickRealType) image->border_color.blue;
    }
    else
    {
        invert = MagickFalse;
        target_mpp.red   = (MagickRealType) target.red;
        target_mpp.green = (MagickRealType) target.green;
        target_mpp.blue  = (MagickRealType) target.blue;
    }

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(FloodfillPaintImage) args = { new_image, draw_info, &target_mpp, x, y, invert, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(FloodfillPaintImage), &args);
    DestroyDrawInfo(draw_info);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(FloodfillPaintImage) args = { new_image, DefaultChannels, draw_info, &target_mpp, x, y, invert };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(FloodfillPaintImage), &args);

    DestroyDrawInfo(draw_info);
    rm_check_image_exception(new_image, DestroyOnError);
#endif

    return rm_image_new(new_image);
}