package elte.java2_utikalauz5.java2d;

import java.awt.*;
import java.awt.image.*;
import java.awt.color.*;
import java.awt.event.*;

/**
peldaprogram egy BufferedImage kep eloallitasara, felhasznalva a megfelelo DataBuffer,
SampleModel, Raster, ColorModel osztalyokat.

@link.forrásfájl {@docRoot}/../data/java2d/src KepEloallitas.java
@link.letöltés {@docRoot}/../data/java2d KepEloallitas.jar
@since Java 2 Útikalauz programozóknak
*/
class KepEloallitas extends Canvas {
    /** Verziószám */
    private final static long serialVersionUID = 15L;

	BufferedImage kep;

	public void kepKeszites () {
		int [] pixelek = new int[100 * 100];

		WritableRaster raster = Raster.createWritableRaster(
			new PixelInterleavedSampleModel (DataBuffer.TYPE_BYTE, 100, 100, 1,
							 100, new int[] {0}),
			new DataBufferByte (100 * 100), null);

		for (int i = 0; i < 100; i++)
			for (int j = 0; j < 100; j++)
				pixelek[i * 100 + j] = i;

		raster.setPixels (0, 0, 100, 100, pixelek);

		ColorSpace szurkeSzinmodell = ColorSpace.getInstance (ColorSpace.CS_GRAY);
		ColorModel ccm = new ComponentColorModel (szurkeSzinmodell, new int[] {1}, false, false,
							  1, DataBuffer.TYPE_BYTE);

		kep = new BufferedImage (ccm, raster, false, null);
	}

	public void paint (Graphics g) {
		Graphics2D g2 = (Graphics2D) g;

		g2.drawImage (kep, 0, 0, this);
	}

	public static void main (String[] args) {
		Frame f = new Frame ();
		KepEloallitas k = new KepEloallitas ();
		k.kepKeszites ();

		f.add (k);

		f.addWindowListener (
			new WindowAdapter () {
				public void windowClosing (WindowEvent e) {
					System.exit (0);
				}
			}
		);

		f.setSize (150, 150);
		f.setVisible (true);
	}
}