Source Code Cross Referenced for MWSubimage.java in  » 6.0-JDK-Modules » j2me » java » awt » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » 6.0 JDK Modules » j2me » java.awt 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


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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