~ubuntu-branches/ubuntu/oneiric/tuxguitar/oneiric

package org.herac.tuxguitar.gui.util;

 

import java.io.ByteArrayOutputStream;

import java.io.OutputStream;

 

import org.eclipse.swt.graphics.ImageData;

import org.eclipse.swt.graphics.ImageLoader;

import org.eclipse.swt.graphics.PaletteData;

import org.eclipse.swt.graphics.RGB;

 

public class ImageUtils {

        /**

         * Escribe el ImageData en el outputStream

         * @param data

         * @param outputStream

         * @param format

         */

        public static void writeImage(ImageData data,OutputStream outputStream,int format){

                ImageLoader loader = new ImageLoader();

                loader.data = new ImageData[]{data};

                loader.save(outputStream,format);

        }

        

        /**

         * Convierte un ImageData en un array de bytes

         * @param data

         * @param format

         * @return

         */

        public static byte[] imageToByteArray(ImageData data,int format){

                ByteArrayOutputStream out = new ByteArrayOutputStream();

                writeImage(data,out,format);

                return out.toByteArray();

        }

        

        /**

         * Crea una mascara a partir de src.

         * 

         * @param src

         * @param alpha

         * @param none

         * @return ImageData

         */

        public static ImageData applyMask(ImageData src,RGB alpha,RGB none){

                ImageData maskData = new ImageData(src.width,src.height,1,new PaletteData(new RGB[]{ none,alpha }  ));

                for(int x = 0; x< maskData.width; x++) {

                        for(int y = 0; y < maskData.height; y++) {

                                RGB rgb = src.palette.getRGB(src.getPixel(x, y));

                                if(rgb.red == alpha.red && rgb.green == alpha.green && rgb.blue == alpha.blue){

                                        maskData.setPixel(x, y, maskData.palette.getPixel(none));

                                }else{

                                        maskData.setPixel(x, y, maskData.palette.getPixel(alpha));

                                }

                        }

                }

                return maskData;

        }

}