Source Code Cross Referenced for MlibErode3PlusOpImage.java in  » 6.0-JDK-Modules » Java-Advanced-Imaging » com » sun » media » jai » mlib » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » 6.0 JDK Modules » Java Advanced Imaging » com.sun.media.jai.mlib 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * $RCSfile: MlibErode3PlusOpImage.java,v $
003:         *
004:         * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
005:         *
006:         * Use is subject to license terms.
007:         *
008:         * $Revision: 1.2 $
009:         * $Date: 2005/12/09 00:20:28 $
010:         * $State: Exp $
011:         */
012:        package com.sun.media.jai.mlib;
013:
014:        import java.awt.Rectangle;
015:        import java.awt.RenderingHints;
016:        import java.awt.image.DataBuffer;
017:        import java.awt.image.SampleModel;
018:        import java.awt.image.Raster;
019:        import java.awt.image.RenderedImage;
020:        import java.awt.image.WritableRaster;
021:        import java.awt.image.renderable.ParameterBlock;
022:        import java.awt.image.renderable.RenderedImageFactory;
023:        import javax.media.jai.AreaOpImage;
024:        import javax.media.jai.BorderExtender;
025:        import javax.media.jai.ImageLayout;
026:        import javax.media.jai.JAI;
027:        import javax.media.jai.KernelJAI;
028:        import javax.media.jai.OpImage;
029:        import java.util.Map;
030:        import com.sun.medialib.mlib.*;
031:
032:        // import com.sun.media.jai.test.OpImageTester;
033:
034:        /**
035:         * An OpImage class to perform erosion on a source image
036:         * for the specific case when the kernel is a 3x3 plus shape
037:         * with the key position in the middle,
038:         * using mediaLib, of course :-).
039:         *
040:         * @see javax.media.jai.operator.ErodeDescriptor
041:         * @see KernelJAI
042:         */
043:        final class MlibErode3PlusOpImage extends AreaOpImage {
044:
045:            // Since medialib expects single banded data with IndexColorModel, we
046:            // should not expand the indexed data
047:            private static Map configHelper(Map configuration) {
048:
049:                Map config;
050:
051:                if (configuration == null) {
052:
053:                    config = new RenderingHints(
054:                            JAI.KEY_REPLACE_INDEX_COLOR_MODEL, Boolean.FALSE);
055:
056:                } else {
057:
058:                    config = configuration;
059:
060:                    // If the user has specified a hint for this, then we don't
061:                    // want to change it, so change only if this hint is not 
062:                    // already specified
063:                    if (!(config.containsKey(JAI.KEY_REPLACE_INDEX_COLOR_MODEL))) {
064:                        RenderingHints hints = (RenderingHints) configuration;
065:                        config = (RenderingHints) hints.clone();
066:                        config.put(JAI.KEY_REPLACE_INDEX_COLOR_MODEL,
067:                                Boolean.FALSE);
068:                    }
069:                }
070:
071:                return config;
072:            }
073:
074:            /**
075:             * Creates a MlibErode3PlusOpImage given the image source
076:             * The image dimensions are
077:             * derived from the source image.  The tile grid layout,
078:             * SampleModel, and ColorModel may optionally be specified by an
079:             * ImageLayout object.
080:             *
081:             * @param source a RenderedImage.
082:             * @param extender a BorderExtender, or null.
083:
084:             *        or null.  If null, a default cache will be used.
085:             * @param layout an ImageLayout optionally containing the tile grid layout,
086:             *        SampleModel, and ColorModel, or null.
087:             */
088:            public MlibErode3PlusOpImage(RenderedImage source,
089:                    BorderExtender extender, Map config, ImageLayout layout) {
090:                super (source, layout, configHelper(config), true, extender, 1, //kernel.getLeftPadding(),
091:                        1, //kernel.getRightPadding(),
092:                        1, //kernel.getTopPadding(),
093:                        1 //kernel.getBottomPadding()
094:                );
095:            }
096:
097:            /**
098:             * Performs erosion on a specified rectangle. The sources are
099:             * cobbled.
100:             *
101:             * @param sources an array of source Rasters, guaranteed to provide all
102:             *                necessary source data for computing the output.
103:             * @param dest a WritableRaster tile containing the area to be computed.
104:             * @param destRect the rectangle within dest to be processed.
105:             */
106:            protected void computeRect(Raster[] sources, WritableRaster dest,
107:                    Rectangle destRect) {
108:
109:                Raster source = sources[0];
110:                Rectangle srcRect = mapDestRect(destRect, 0);
111:
112:                int formatTag = MediaLibAccessor.findCompatibleTag(sources,
113:                        dest);
114:
115:                MediaLibAccessor srcAccessor = new MediaLibAccessor(source,
116:                        srcRect, formatTag, true);
117:                MediaLibAccessor dstAccessor = new MediaLibAccessor(dest,
118:                        destRect, formatTag, true);
119:                int numBands = getSampleModel().getNumBands();
120:
121:                mediaLibImage[] srcML = srcAccessor.getMediaLibImages();
122:                mediaLibImage[] dstML = dstAccessor.getMediaLibImages();
123:                for (int i = 0; i < dstML.length; i++) {
124:                    switch (dstAccessor.getDataType()) {
125:                    case DataBuffer.TYPE_BYTE:
126:                    case DataBuffer.TYPE_USHORT:
127:                    case DataBuffer.TYPE_SHORT:
128:                    case DataBuffer.TYPE_INT:
129:                        Image.Erode4(dstML[i], srcML[i]);
130:                        break;
131:                    case DataBuffer.TYPE_FLOAT:
132:                    case DataBuffer.TYPE_DOUBLE:
133:                        Image.Erode4_Fp(dstML[i], srcML[i]);
134:                        break;
135:                    default:
136:                        String className = this .getClass().getName();
137:                        throw new RuntimeException(JaiI18N
138:                                .getString("Generic2"));
139:                    }
140:                }
141:
142:                if (dstAccessor.isDataCopy()) {
143:                    dstAccessor.copyDataToRaster();
144:                }
145:            }
146:
147:            //     public static OpImage createTestImage(OpImageTester oit) {
148:            //         float data[] = {0.05f,0.10f,0.05f,
149:            //                         0.10f,0.40f,0.10f,
150:            //                         0.05f,0.10f,0.05f};
151:            //         KernelJAI kJAI = new KernelJAI(3,3,1,1,data);
152:            //         return new MlibErode4OpImage(oit.getSource(), null, null,
153:            //                                           new ImageLayout(oit.getSource()),
154:            //                                           kJAI);
155:            //     }
156:
157:            //     public static void main (String args[]) {
158:            //         String classname = "com.sun.media.jai.mlib.MlibErode4OpImage";
159:            //         OpImageTester.performDiagnostics(classname,args);
160:            //     }
161:        }
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