Source Code Cross Referenced for MultiplyConstOpImage.java in  » 6.0-JDK-Modules » Java-Advanced-Imaging » com » sun » media » jai » opimage » 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.opimage 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * $RCSfile: MultiplyConstOpImage.java,v $
003:         *
004:         * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
005:         *
006:         * Use is subject to license terms.
007:         *
008:         * $Revision: 1.1 $
009:         * $Date: 2005/02/11 04:56:37 $
010:         * $State: Exp $
011:         */
012:        package com.sun.media.jai.opimage;
013:
014:        import javax.media.jai.ColormapOpImage;
015:        import com.sun.media.jai.util.ImageUtil;
016:        import java.awt.Rectangle;
017:        import java.awt.image.DataBuffer;
018:        import java.awt.image.Raster;
019:        import java.awt.image.RenderedImage;
020:        import java.awt.image.WritableRaster;
021:        import javax.media.jai.ImageLayout;
022:        import javax.media.jai.RasterAccessor;
023:        import javax.media.jai.RasterFormatTag;
024:        import java.util.Map;
025:
026:        /**
027:         * An <code>OpImage</code> implementing the "MultiplyConst" operation.
028:         *
029:         * <p>This <code>OpImage</code> multiplies a set of constants, one for
030:         * each band of the source image, to the pixels of a rendered image.
031:         * The destination pixel values are calculated as:
032:         * <pre>
033:         *     for (int h = 0; h < dstHeight; h++) {
034:         *         for (int w = 0; w < dstWidth; w++) {
035:         *             for (int b = 0; b < dstNumBands; b++) {
036:         *                 if (constants.length < dstNumBands) {
037:         *                     dst[h][w][b] = srcs[h][w][b] * constants[0];
038:         *                 } else {
039:         *                     dst[h][w][b] = srcs[h][w][b] * constants[b];
040:         *                 }
041:         *             }
042:         *         }
043:         *     }
044:         * </pre>
045:         *
046:         * @see javax.media.jai.operator.MultiplyConstDescriptor
047:         * @see MultiplyConstCRIF
048:         *
049:         *
050:         * @since EA2
051:         */
052:        final class MultiplyConstOpImage extends ColormapOpImage {
053:
054:            /** The constants to be multiplied, one for each band. */
055:            protected double[] constants;
056:
057:            /**
058:             * Constructor.
059:             *
060:             * @param source     The source image.
061:             * @param layout     The destination image layout.
062:             * @param constants  The constants to be multiplied, stored as reference.
063:             */
064:            public MultiplyConstOpImage(RenderedImage source, Map config,
065:                    ImageLayout layout, double[] constants) {
066:                super (source, layout, config, true);
067:
068:                int numBands = getSampleModel().getNumBands();
069:
070:                if (constants.length < numBands) {
071:                    this .constants = new double[numBands];
072:                    for (int i = 0; i < numBands; i++) {
073:                        this .constants[i] = constants[0];
074:                    }
075:                } else {
076:                    this .constants = (double[]) constants.clone();
077:                }
078:
079:                // Set flag to permit in-place operation.
080:                permitInPlaceOperation();
081:
082:                // Initialize the colormap if necessary.
083:                initializeColormapOperation();
084:            }
085:
086:            /**
087:             * Transform the colormap according to the rescaling parameters.
088:             */
089:            protected void transformColormap(byte[][] colormap) {
090:                for (int b = 0; b < 3; b++) {
091:                    byte[] map = colormap[b];
092:                    int mapSize = map.length;
093:
094:                    double c = b < constants.length ? constants[b]
095:                            : constants[0];
096:
097:                    for (int i = 0; i < mapSize; i++) {
098:                        map[i] = ImageUtil.clampRoundByte((map[i] & 0xFF) * c);
099:                    }
100:                }
101:            }
102:
103:            /**
104:             * Multiplies a constant to the pixel values within a specified rectangle.
105:             *
106:             * @param sources   Cobbled sources, guaranteed to provide all the
107:             *                  source data necessary for computing the rectangle.
108:             * @param dest      The tile containing the rectangle to be computed.
109:             * @param destRect  The rectangle within the tile to be computed.
110:             */
111:            protected void computeRect(Raster[] sources, WritableRaster dest,
112:                    Rectangle destRect) {
113:                // Retrieve format tags.
114:                RasterFormatTag[] formatTags = getFormatTags();
115:
116:                Rectangle srcRect = mapDestRect(destRect, 0);
117:
118:                RasterAccessor dst = new RasterAccessor(dest, destRect,
119:                        formatTags[1], getColorModel());
120:                RasterAccessor src = new RasterAccessor(sources[0], srcRect,
121:                        formatTags[0], getSource(0).getColorModel());
122:
123:                switch (dst.getDataType()) {
124:                case DataBuffer.TYPE_BYTE:
125:                    computeRectByte(src, dst);
126:                    break;
127:                case DataBuffer.TYPE_USHORT:
128:                    computeRectUShort(src, dst);
129:                    break;
130:                case DataBuffer.TYPE_SHORT:
131:                    computeRectShort(src, dst);
132:                    break;
133:                case DataBuffer.TYPE_INT:
134:                    computeRectInt(src, dst);
135:                    break;
136:                case DataBuffer.TYPE_FLOAT:
137:                    computeRectFloat(src, dst);
138:                    break;
139:                case DataBuffer.TYPE_DOUBLE:
140:                    computeRectDouble(src, dst);
141:                    break;
142:                }
143:
144:                if (dst.needsClamping()) {
145:                    /* Further clamp down to underlying raster data type. */
146:                    dst.clampDataArrays();
147:                }
148:                dst.copyDataToRaster();
149:            }
150:
151:            private void computeRectByte(RasterAccessor src, RasterAccessor dst) {
152:                int dstWidth = dst.getWidth();
153:                int dstHeight = dst.getHeight();
154:                int dstBands = dst.getNumBands();
155:
156:                int dstLineStride = dst.getScanlineStride();
157:                int dstPixelStride = dst.getPixelStride();
158:                int[] dstBandOffsets = dst.getBandOffsets();
159:                byte[][] dstData = dst.getByteDataArrays();
160:
161:                int srcLineStride = src.getScanlineStride();
162:                int srcPixelStride = src.getPixelStride();
163:                int[] srcBandOffsets = src.getBandOffsets();
164:                byte[][] srcData = src.getByteDataArrays();
165:
166:                for (int b = 0; b < dstBands; b++) {
167:                    float c = (float) constants[b];
168:                    byte[] d = dstData[b];
169:                    byte[] s = srcData[b];
170:
171:                    int dstLineOffset = dstBandOffsets[b];
172:                    int srcLineOffset = srcBandOffsets[b];
173:
174:                    for (int h = 0; h < dstHeight; h++) {
175:                        int dstPixelOffset = dstLineOffset;
176:                        int srcPixelOffset = srcLineOffset;
177:
178:                        dstLineOffset += dstLineStride;
179:                        srcLineOffset += srcLineStride;
180:
181:                        for (int w = 0; w < dstWidth; w++) {
182:                            d[dstPixelOffset] = ImageUtil
183:                                    .clampRoundByte((s[srcPixelOffset] & 0xFF)
184:                                            * c);
185:
186:                            dstPixelOffset += dstPixelStride;
187:                            srcPixelOffset += srcPixelStride;
188:                        }
189:                    }
190:                }
191:            }
192:
193:            private void computeRectUShort(RasterAccessor src,
194:                    RasterAccessor dst) {
195:                int dstWidth = dst.getWidth();
196:                int dstHeight = dst.getHeight();
197:                int dstBands = dst.getNumBands();
198:
199:                int dstLineStride = dst.getScanlineStride();
200:                int dstPixelStride = dst.getPixelStride();
201:                int[] dstBandOffsets = dst.getBandOffsets();
202:                short[][] dstData = dst.getShortDataArrays();
203:
204:                int srcLineStride = src.getScanlineStride();
205:                int srcPixelStride = src.getPixelStride();
206:                int[] srcBandOffsets = src.getBandOffsets();
207:                short[][] srcData = src.getShortDataArrays();
208:
209:                for (int b = 0; b < dstBands; b++) {
210:                    float c = (float) constants[b];
211:                    short[] d = dstData[b];
212:                    short[] s = srcData[b];
213:
214:                    int dstLineOffset = dstBandOffsets[b];
215:                    int srcLineOffset = srcBandOffsets[b];
216:
217:                    for (int h = 0; h < dstHeight; h++) {
218:                        int dstPixelOffset = dstLineOffset;
219:                        int srcPixelOffset = srcLineOffset;
220:
221:                        dstLineOffset += dstLineStride;
222:                        srcLineOffset += srcLineStride;
223:
224:                        for (int w = 0; w < dstWidth; w++) {
225:                            d[dstPixelOffset] = ImageUtil
226:                                    .clampRoundUShort((s[srcPixelOffset] & 0xFFFF)
227:                                            * c);
228:
229:                            dstPixelOffset += dstPixelStride;
230:                            srcPixelOffset += srcPixelStride;
231:                        }
232:                    }
233:                }
234:            }
235:
236:            private void computeRectShort(RasterAccessor src, RasterAccessor dst) {
237:                int dstWidth = dst.getWidth();
238:                int dstHeight = dst.getHeight();
239:                int dstBands = dst.getNumBands();
240:
241:                int dstLineStride = dst.getScanlineStride();
242:                int dstPixelStride = dst.getPixelStride();
243:                int[] dstBandOffsets = dst.getBandOffsets();
244:                short[][] dstData = dst.getShortDataArrays();
245:
246:                int srcLineStride = src.getScanlineStride();
247:                int srcPixelStride = src.getPixelStride();
248:                int[] srcBandOffsets = src.getBandOffsets();
249:                short[][] srcData = src.getShortDataArrays();
250:
251:                for (int b = 0; b < dstBands; b++) {
252:                    float c = (float) constants[b];
253:                    short[] d = dstData[b];
254:                    short[] s = srcData[b];
255:
256:                    int dstLineOffset = dstBandOffsets[b];
257:                    int srcLineOffset = srcBandOffsets[b];
258:
259:                    for (int h = 0; h < dstHeight; h++) {
260:                        int dstPixelOffset = dstLineOffset;
261:                        int srcPixelOffset = srcLineOffset;
262:
263:                        dstLineOffset += dstLineStride;
264:                        srcLineOffset += srcLineStride;
265:
266:                        for (int w = 0; w < dstWidth; w++) {
267:                            d[dstPixelOffset] = ImageUtil
268:                                    .clampRoundShort(s[srcPixelOffset] * c);
269:
270:                            dstPixelOffset += dstPixelStride;
271:                            srcPixelOffset += srcPixelStride;
272:                        }
273:                    }
274:                }
275:            }
276:
277:            private void computeRectInt(RasterAccessor src, RasterAccessor dst) {
278:                int dstWidth = dst.getWidth();
279:                int dstHeight = dst.getHeight();
280:                int dstBands = dst.getNumBands();
281:
282:                int dstLineStride = dst.getScanlineStride();
283:                int dstPixelStride = dst.getPixelStride();
284:                int[] dstBandOffsets = dst.getBandOffsets();
285:                int[][] dstData = dst.getIntDataArrays();
286:
287:                int srcLineStride = src.getScanlineStride();
288:                int srcPixelStride = src.getPixelStride();
289:                int[] srcBandOffsets = src.getBandOffsets();
290:                int[][] srcData = src.getIntDataArrays();
291:
292:                for (int b = 0; b < dstBands; b++) {
293:                    double c = constants[b];
294:                    int[] d = dstData[b];
295:                    int[] s = srcData[b];
296:
297:                    int dstLineOffset = dstBandOffsets[b];
298:                    int srcLineOffset = srcBandOffsets[b];
299:
300:                    for (int h = 0; h < dstHeight; h++) {
301:                        int dstPixelOffset = dstLineOffset;
302:                        int srcPixelOffset = srcLineOffset;
303:
304:                        dstLineOffset += dstLineStride;
305:                        srcLineOffset += srcLineStride;
306:
307:                        for (int w = 0; w < dstWidth; w++) {
308:                            d[dstPixelOffset] = ImageUtil
309:                                    .clampRoundInt(s[srcPixelOffset] * c);
310:
311:                            dstPixelOffset += dstPixelStride;
312:                            srcPixelOffset += srcPixelStride;
313:                        }
314:                    }
315:                }
316:            }
317:
318:            private void computeRectFloat(RasterAccessor src, RasterAccessor dst) {
319:                int dstWidth = dst.getWidth();
320:                int dstHeight = dst.getHeight();
321:                int dstBands = dst.getNumBands();
322:
323:                int dstLineStride = dst.getScanlineStride();
324:                int dstPixelStride = dst.getPixelStride();
325:                int[] dstBandOffsets = dst.getBandOffsets();
326:                float[][] dstData = dst.getFloatDataArrays();
327:
328:                int srcLineStride = src.getScanlineStride();
329:                int srcPixelStride = src.getPixelStride();
330:                int[] srcBandOffsets = src.getBandOffsets();
331:                float[][] srcData = src.getFloatDataArrays();
332:
333:                for (int b = 0; b < dstBands; b++) {
334:                    double c = constants[b];
335:                    float[] d = dstData[b];
336:                    float[] s = srcData[b];
337:
338:                    int dstLineOffset = dstBandOffsets[b];
339:                    int srcLineOffset = srcBandOffsets[b];
340:
341:                    for (int h = 0; h < dstHeight; h++) {
342:                        int dstPixelOffset = dstLineOffset;
343:                        int srcPixelOffset = srcLineOffset;
344:
345:                        dstLineOffset += dstLineStride;
346:                        srcLineOffset += srcLineStride;
347:
348:                        for (int w = 0; w < dstWidth; w++) {
349:                            d[dstPixelOffset] = ImageUtil
350:                                    .clampFloat(s[srcPixelOffset] * c);
351:
352:                            dstPixelOffset += dstPixelStride;
353:                            srcPixelOffset += srcPixelStride;
354:                        }
355:                    }
356:                }
357:            }
358:
359:            private void computeRectDouble(RasterAccessor src,
360:                    RasterAccessor dst) {
361:                int dstWidth = dst.getWidth();
362:                int dstHeight = dst.getHeight();
363:                int dstBands = dst.getNumBands();
364:
365:                int dstLineStride = dst.getScanlineStride();
366:                int dstPixelStride = dst.getPixelStride();
367:                int[] dstBandOffsets = dst.getBandOffsets();
368:                double[][] dstData = dst.getDoubleDataArrays();
369:
370:                int srcLineStride = src.getScanlineStride();
371:                int srcPixelStride = src.getPixelStride();
372:                int[] srcBandOffsets = src.getBandOffsets();
373:                double[][] srcData = src.getDoubleDataArrays();
374:
375:                for (int b = 0; b < dstBands; b++) {
376:                    double c = constants[b];
377:                    double[] d = dstData[b];
378:                    double[] s = srcData[b];
379:
380:                    int dstLineOffset = dstBandOffsets[b];
381:                    int srcLineOffset = srcBandOffsets[b];
382:
383:                    for (int h = 0; h < dstHeight; h++) {
384:                        int dstPixelOffset = dstLineOffset;
385:                        int srcPixelOffset = srcLineOffset;
386:
387:                        dstLineOffset += dstLineStride;
388:                        srcLineOffset += srcLineStride;
389:
390:                        for (int w = 0; w < dstWidth; w++) {
391:                            d[dstPixelOffset] = s[srcPixelOffset] * c;
392:
393:                            dstPixelOffset += dstPixelStride;
394:                            srcPixelOffset += srcPixelStride;
395:                        }
396:                    }
397:                }
398:            }
399:        }
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