Java Image divideImage(Object obj, int rows, int cols)

Description

divide Image

License

Open Source License

Declaration

public static List<BufferedImage> divideImage(Object obj, int rows, int cols) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.awt.*;

import java.awt.image.*;

import java.util.ArrayList;
import java.util.List;

import javax.swing.*;

public class Main {

    public static List<BufferedImage> divideImage(Object obj, int rows, int cols) {
        BufferedImage bi;/*from w w  w.  j  av  a  2  s  . com*/

        if (obj instanceof Image) {
            bi = toBufferedImage((Image) obj);
        } else if (obj instanceof ImageIcon) {
            bi = toBufferedImage(((ImageIcon) obj).getImage());
        } else {
            bi = (BufferedImage) obj;
        }

        int altoBi = bi.getHeight() / rows;
        int anchoBi = bi.getWidth() / cols;

        List<BufferedImage> imagenes = new ArrayList<>();
        BufferedImage subImagen;

        for (int f = 0; f < rows; f++) {
            for (int c = 0; c < cols; c++) {
                subImagen = bi.getSubimage(c * anchoBi, f * altoBi, anchoBi, altoBi);
                imagenes.add(subImagen);
            }
        }

        return imagenes;
    }

    public static List<BufferedImage> divideImage(BufferedImage bi, int rows, int cols, int width, int height) {
        int x, y;
        List<BufferedImage> imagenes = new ArrayList<>();

        for (int i = 0; i < rows; i++) {
            for (int j = 0; j < cols; j++) {
                x = j * width;
                y = i * height;
                imagenes.add(bi.getSubimage(x, y, width, height));
            }
        }

        return imagenes;
    }

    /**
     * Convierte un objeto Image a un BufferedImage
     *
     * @param img El objeto Image a convertir
     * @return El BufferedImage obtenido
     */
    public static BufferedImage toBufferedImage(Image img) {
        if (img instanceof BufferedImage) {
            return (BufferedImage) img;
        }
        // Crea un buffered image con trasparencia
        BufferedImage bimage = new BufferedImage(img.getWidth(null), img.getHeight(null),
                BufferedImage.TYPE_INT_ARGB);
        // Dibuja la imagen en el buffered image
        Graphics2D bGr = bimage.createGraphics();
        bGr.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
        bGr.drawImage(img, 0, 0, null);
        bGr.dispose();
        // Retorna el buffered image
        return bimage;
    }

    /**
     * Obtiene el alto de una Image
     */
    public static int getHeight(Image imagen) {
        int height = new ImageIcon(imagen).getIconHeight();
        return height;
    }

    /**
     * Obtiene el alto de un IconImage
     */
    public static int getHeight(ImageIcon imagen) {
        return imagen.getIconHeight();
    }

    /**
     * Obtiene el ancho de una Image
     */
    public static int getWidth(Image imagen) {
        int width = new ImageIcon(imagen).getIconWidth();
        return width;
    }

    /**
     * Obtiene el ancho de un IconImage
     */
    public static int getWidth(ImageIcon imagen) {
        return imagen.getIconWidth();
    }
}

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