qtsubimage.java

来自「This is a resource based on j2me embedde」· Java 代码 · 共 131 行

/*
 * @(#)QtSubimage.java	1.12 06/10/10
 * 
 * Copyright  1990-2008 Sun Microsystems, Inc. All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License version
 * 2 only, as published by the Free Software Foundation. 
 * 
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License version 2 for more details (a copy is
 * included at /legal/license.txt). 
 * 
 * You should have received a copy of the GNU General Public License
 * version 2 along with this work; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA 
 * 
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
 * Clara, CA 95054 or visit www.sun.com if you need additional
 * information or have any questions. 
 */

package java.awt;


import java.awt.image.CropImageFilter;
import java.awt.image.FilteredImageSource;
import java.awt.image.ImageObserver;


/** @version 1.7, 03/13/02 */ 


/** An offscreen image created by BufferedImage.getSubimage(int width, int height). As it is not
 possible to create a graphics from an image produced
 through the image producer/consumer model this class exists to allow us to get the graphics
 for a subimage image. */

class QtSubimage extends QtImage {
	private int originX, originY;
	private int subWidth, subHeight;

	QtSubimage(QtImage img, int x, int y, int width, int height) {
		super(img);

		originX = x;
		originY = y;

		subWidth = width;
		subHeight = height;

		started = true;

		producer = new FilteredImageSource(img.getSource(), new CropImageFilter(x, y, width, height));
	}

	public Graphics getGraphics() {
		return new QtGraphics (this, originX, originY);
	}

	public int getRGB(int x, int y) {
		if(x<0||y<0||x>=subWidth||y>=subHeight)
			 throw new java.lang.ArrayIndexOutOfBoundsException(x+y*subWidth);

		return super.getRGB(x + originX, y + originY);
	}

	public int[] getRGB(int startX, int startY, int w, int h, int[] rgbArray, int offset, int scansize) {
		if(startX<0||startY<0||startX+w>subWidth||startY+h>subHeight)
			 throw new java.lang.ArrayIndexOutOfBoundsException(startX+startY*subWidth);

		return super.getRGB(startX + originX, startY + originY, w, h, rgbArray, offset, scansize);
	}

	public void setRGB(int x, int y, int rgb) {
		if(x<0||y<0||x>=subWidth||y>=subHeight)
			 throw new java.lang.ArrayIndexOutOfBoundsException(x+y*subWidth);

		super.setRGB(x + originX, y + originY, rgb);
	}

	public void setRGB(int startX, int startY, int w, int h, int[] rgbArray, int offset, int scansize) {
		if(startX<0||startY<0||startX+w>subWidth||startY+h>subHeight)
			 throw new java.lang.ArrayIndexOutOfBoundsException(startX+startY*subWidth);

		super.setRGB(startX + originX, startY + originY, w, h, rgbArray, offset, scansize);
	}

	public int getWidth() {
		return subWidth;
	}

	public int getWidth(ImageObserver observer) {
		if (width == -1)
			addObserver(observer);

		return subWidth;
	}

	public int getHeight() {
		return subHeight;
	}

	public int getHeight(ImageObserver observer) {
		if (height == -1)
			addObserver(observer);

		return subHeight;
	}

	void drawImage(int psd, int x, int y, Color bg) {
		super.drawImage(psd, x, y, x + subWidth - 1, y + subHeight - 1, originX, originY, originX + subWidth - 1, originY + subHeight - 1, bg);
	}

	void drawImage(int psd, int dx1, int dy1, int dx2, int dy2, int sx1, int sy1, int sx2, int sy2, Color bg) {
		super.drawImage(psd, dx1, dy1, dx2, dy2, sx1 + originX, sy1 + originY, sx2 + originX, sy2 + originY, bg);
	}

}