001: /*
002: * @(#)MWSubimage.java 1.15 06/10/10
003: *
004: * Copyright 1990-2006 Sun Microsystems, Inc. All Rights Reserved.
005: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
006: *
007: * This program is free software; you can redistribute it and/or
008: * modify it under the terms of the GNU General Public License version
009: * 2 only, as published by the Free Software Foundation.
010: *
011: * This program is distributed in the hope that it will be useful, but
012: * WITHOUT ANY WARRANTY; without even the implied warranty of
013: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014: * General Public License version 2 for more details (a copy is
015: * included at /legal/license.txt).
016: *
017: * You should have received a copy of the GNU General Public License
018: * version 2 along with this work; if not, write to the Free Software
019: * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
020: * 02110-1301 USA
021: *
022: * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
023: * Clara, CA 95054 or visit www.sun.com if you need additional
024: * information or have any questions.
025: *
026: */
027:
028: package java.awt;
029:
030: import java.awt.image.CropImageFilter;
031: import java.awt.image.FilteredImageSource;
032: import java.awt.image.ImageObserver;
033:
034: /** @version 1.7, 03/13/02 */
035:
036: /** An offscreen image created by BufferedImage.getSubimage(int width, int height). As it is not
037: possible to create a graphics from an image produced
038: through the image producer/consumer model this class exists to allow us to get the graphics
039: for a subimage image. */
040:
041: class MWSubimage extends MWImage {
042: private int originX, originY;
043: private int subWidth, subHeight;
044:
045: MWSubimage(MWImage img, int x, int y, int width, int height) {
046: super (img);
047: originX = x;
048: originY = y;
049: subWidth = width;
050: subHeight = height;
051: started = true;
052: producer = new FilteredImageSource(img.getSource(),
053: new CropImageFilter(x, y, width, height));
054: }
055:
056: public Graphics getGraphics() {
057: return new MWGraphics(this , originX, originY);
058: }
059:
060: public int getRGB(int x, int y) {
061: if (x < 0 || y < 0 || x >= subWidth || y >= subHeight)
062: throw new java.lang.ArrayIndexOutOfBoundsException(x + y
063: * subWidth);
064: return super .getRGB(x + originX, y + originY);
065: }
066:
067: public int[] getRGB(int startX, int startY, int w, int h,
068: int[] rgbArray, int offset, int scansize) {
069: if (startX < 0 || startY < 0 || startX + w > subWidth
070: || startY + h > subHeight)
071: throw new java.lang.ArrayIndexOutOfBoundsException(startX
072: + startY * subWidth);
073: return super .getRGB(startX + originX, startY + originY, w, h,
074: rgbArray, offset, scansize);
075: }
076:
077: public void setRGB(int x, int y, int rgb) {
078: if (x < 0 || y < 0 || x >= subWidth || y >= subHeight)
079: throw new java.lang.ArrayIndexOutOfBoundsException(x + y
080: * subWidth);
081: super .setRGB(x + originX, y + originY, rgb);
082: }
083:
084: public void setRGB(int startX, int startY, int w, int h,
085: int[] rgbArray, int offset, int scansize) {
086: if (startX < 0 || startY < 0 || startX + w > subWidth
087: || startY + h > subHeight)
088: throw new java.lang.ArrayIndexOutOfBoundsException(startX
089: + startY * subWidth);
090: super .setRGB(startX + originX, startY + originY, w, h,
091: rgbArray, offset, scansize);
092: }
093:
094: public int getWidth() {
095: return subWidth;
096: }
097:
098: public int getWidth(ImageObserver observer) {
099: if (width == -1)
100: addObserver(observer);
101: return subWidth;
102: }
103:
104: public int getHeight() {
105: return subHeight;
106: }
107:
108: public int getHeight(ImageObserver observer) {
109: if (height == -1)
110: addObserver(observer);
111: return subHeight;
112: }
113:
114: void drawImage(int psd, int x, int y, Color bg) {
115: super .drawImage(psd, x, y, x + subWidth - 1, y + subHeight - 1,
116: originX, originY, originX + subWidth - 1, originY
117: + subHeight - 1, bg);
118: }
119:
120: void drawImage(int psd, int dx1, int dy1, int dx2, int dy2,
121: int sx1, int sy1, int sx2, int sy2, Color bg) {
122: super.drawImage(psd, dx1, dy1, dx2, dy2, sx1 + originX, sy1
123: + originY, sx2 + originX, sy2 + originY, bg);
124: }
125: }
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