Source Code Cross Referenced for Any2sRGBRed.java in  » Graphic-Library » xmlgraphics-commons-1.2 » org » apache » xmlgraphics » image » rendered » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Graphic Library » xmlgraphics commons 1.2 » org.apache.xmlgraphics.image.rendered 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Licensed to the Apache Software Foundation (ASF) under one or more
003:         * contributor license agreements.  See the NOTICE file distributed with
004:         * this work for additional information regarding copyright ownership.
005:         * The ASF licenses this file to You under the Apache License, Version 2.0
006:         * (the "License"); you may not use this file except in compliance with
007:         * the License.  You may obtain a copy of the License at
008:         * 
009:         *      http://www.apache.org/licenses/LICENSE-2.0
010:         * 
011:         * Unless required by applicable law or agreed to in writing, software
012:         * distributed under the License is distributed on an "AS IS" BASIS,
013:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014:         * See the License for the specific language governing permissions and
015:         * limitations under the License.
016:         */
017:
018:        /* $Id: Any2sRGBRed.java 496556 2007-01-16 00:59:48Z cam $ */
019:
020:        package org.apache.xmlgraphics.image.rendered;
021:
022:        import java.awt.color.ColorSpace;
023:        import java.awt.image.BandCombineOp;
024:        import java.awt.image.BufferedImage;
025:        import java.awt.image.ColorConvertOp;
026:        import java.awt.image.ColorModel;
027:        import java.awt.image.DataBuffer;
028:        import java.awt.image.DataBufferInt;
029:        import java.awt.image.Raster;
030:        import java.awt.image.SampleModel;
031:        import java.awt.image.SinglePixelPackedSampleModel;
032:        import java.awt.image.WritableRaster;
033:
034:        import org.apache.xmlgraphics.image.GraphicsUtil;
035:
036:        /**
037:         * This function will tranform an image from any colorspace into a
038:         * luminance image.  The alpha channel if any will be copied to the
039:         * new image.
040:         *
041:         * @author <a href="mailto:Thomas.DeWeeese@Kodak.com">Thomas DeWeese</a>
042:         * @version $Id: Any2sRGBRed.java 496556 2007-01-16 00:59:48Z cam $ */
043:        public class Any2sRGBRed extends AbstractRed {
044:
045:            boolean srcIsLsRGB = false;
046:
047:            /**
048:             * Construct a luminace image from src.
049:             *
050:             * @param src The image to convert to a luminance image
051:             */
052:            public Any2sRGBRed(CachableRed src) {
053:                super (src, src.getBounds(), fixColorModel(src),
054:                        fixSampleModel(src), src.getTileGridXOffset(), src
055:                                .getTileGridYOffset(), null);
056:
057:                ColorModel srcCM = src.getColorModel();
058:                if (srcCM == null)
059:                    return;
060:                ColorSpace srcCS = srcCM.getColorSpace();
061:                if (srcCS == ColorSpace.getInstance(ColorSpace.CS_LINEAR_RGB))
062:                    srcIsLsRGB = true;
063:            }
064:
065:            public static boolean is_INT_PACK_COMP(SampleModel sm) {
066:                if (!(sm instanceof  SinglePixelPackedSampleModel))
067:                    return false;
068:
069:                // Check transfer types
070:                if (sm.getDataType() != DataBuffer.TYPE_INT)
071:                    return false;
072:
073:                SinglePixelPackedSampleModel sppsm;
074:                sppsm = (SinglePixelPackedSampleModel) sm;
075:
076:                int[] masks = sppsm.getBitMasks();
077:                if ((masks.length != 3) && (masks.length != 4))
078:                    return false;
079:                if (masks[0] != 0x00ff0000)
080:                    return false;
081:                if (masks[1] != 0x0000ff00)
082:                    return false;
083:                if (masks[2] != 0x000000ff)
084:                    return false;
085:                if ((masks.length == 4) && (masks[3] != 0xff000000))
086:                    return false;
087:
088:                return true;
089:            }
090:
091:            /**
092:             * Exponent for linear to sRGB convertion
093:             */
094:            private static final double GAMMA = 2.4;
095:
096:            /**
097:             * Lookup tables for RGB lookups. The linearToSRGBLut is used
098:             * when noise values are considered to be on a linearScale. The
099:             * linearToLinear table is used when the values are considered to
100:             * be on the sRGB scale to begin with.
101:             */
102:            private static final int[] linearToSRGBLut = new int[256];
103:            static {
104:                final double scale = 1.0 / 255;
105:                final double exp = 1.0 / GAMMA;
106:                // System.out.print("L2S: ");
107:                for (int i = 0; i < 256; i++) {
108:                    double value = i * scale;
109:                    if (value <= 0.0031308)
110:                        value *= 12.92;
111:                    else
112:                        value = 1.055 * Math.pow(value, exp) - 0.055;
113:
114:                    linearToSRGBLut[i] = (int) Math.round(value * 255.);
115:                    // System.out.print(linearToSRGBLut[i] + ",");
116:                }
117:                // System.out.println("");
118:            }
119:
120:            public static WritableRaster applyLut_INT(WritableRaster wr,
121:                    final int[] lut) {
122:                SinglePixelPackedSampleModel sm = (SinglePixelPackedSampleModel) wr
123:                        .getSampleModel();
124:                DataBufferInt db = (DataBufferInt) wr.getDataBuffer();
125:
126:                final int srcBase = (db.getOffset() + sm.getOffset(wr.getMinX()
127:                        - wr.getSampleModelTranslateX(), wr.getMinY()
128:                        - wr.getSampleModelTranslateY()));
129:                // Access the pixel data array
130:                final int[] pixels = db.getBankData()[0];
131:                final int width = wr.getWidth();
132:                final int height = wr.getHeight();
133:                final int scanStride = sm.getScanlineStride();
134:
135:                int end, pix;
136:
137:                // For alpha premult we need to multiply all comps.
138:                for (int y = 0; y < height; y++) {
139:                    int sp = srcBase + y * scanStride;
140:                    end = sp + width;
141:
142:                    while (sp < end) {
143:                        pix = pixels[sp];
144:                        pixels[sp] = ((pix & 0xFF000000)
145:                                | (lut[(pix >>> 16) & 0xFF] << 16)
146:                                | (lut[(pix >>> 8) & 0xFF] << 8) | (lut[(pix) & 0xFF]));
147:                        sp++;
148:                    }
149:                }
150:
151:                return wr;
152:            }
153:
154:            public WritableRaster copyData(WritableRaster wr) {
155:
156:                // Get my source.
157:                CachableRed src = (CachableRed) getSources().get(0);
158:                ColorModel srcCM = src.getColorModel();
159:                SampleModel srcSM = src.getSampleModel();
160:
161:                // Fast case, Linear SRGB source, INT Pack writable raster...
162:                if (srcIsLsRGB && is_INT_PACK_COMP(wr.getSampleModel())) {
163:                    src.copyData(wr);
164:                    if (srcCM.hasAlpha())
165:                        GraphicsUtil.coerceData(wr, srcCM, false);
166:                    applyLut_INT(wr, linearToSRGBLut);
167:                    return wr;
168:                }
169:
170:                if (srcCM == null) {
171:                    // We don't really know much about this source, let's
172:                    // guess based on the number of bands...
173:
174:                    float[][] matrix = null;
175:                    switch (srcSM.getNumBands()) {
176:                    case 1:
177:                        matrix = new float[3][1];
178:                        matrix[0][0] = 1; // Red
179:                        matrix[1][0] = 1; // Grn
180:                        matrix[2][0] = 1; // Blu
181:                        break;
182:                    case 2:
183:                        matrix = new float[4][2];
184:                        matrix[0][0] = 1; // Red
185:                        matrix[1][0] = 1; // Grn
186:                        matrix[3][0] = 1; // Blu
187:                        matrix[3][1] = 1; // Alpha
188:                        break;
189:                    case 3:
190:                        matrix = new float[3][3];
191:                        matrix[0][0] = 1; // Red
192:                        matrix[1][1] = 1; // Grn
193:                        matrix[2][2] = 1; // Blu
194:                        break;
195:                    default:
196:                        matrix = new float[4][srcSM.getNumBands()];
197:                        matrix[0][0] = 1; // Red
198:                        matrix[1][1] = 1; // Grn
199:                        matrix[2][2] = 1; // Blu
200:                        matrix[3][3] = 1; // Alpha
201:                        break;
202:                    }
203:                    Raster srcRas = src.getData(wr.getBounds());
204:                    BandCombineOp op = new BandCombineOp(matrix, null);
205:                    op.filter(srcRas, wr);
206:                    return wr;
207:                }
208:
209:                if (srcCM.getColorSpace() == ColorSpace
210:                        .getInstance(ColorSpace.CS_GRAY)) {
211:
212:                    // This is a little bit of a hack.  There is only
213:                    // a linear grayscale ICC profile in the JDK so
214:                    // many things use this when the data _really_
215:                    // has sRGB gamma applied.
216:                    try {
217:                        float[][] matrix = null;
218:                        switch (srcSM.getNumBands()) {
219:                        case 1:
220:                            matrix = new float[3][1];
221:                            matrix[0][0] = 1; // Red
222:                            matrix[1][0] = 1; // Grn
223:                            matrix[2][0] = 1; // Blu
224:                            break;
225:                        case 2:
226:                        default:
227:                            matrix = new float[4][2];
228:                            matrix[0][0] = 1; // Red
229:                            matrix[1][0] = 1; // Grn
230:                            matrix[3][0] = 1; // Blu
231:                            matrix[4][1] = 1; // Alpha
232:                            break;
233:                        }
234:                        Raster srcRas = src.getData(wr.getBounds());
235:                        BandCombineOp op = new BandCombineOp(matrix, null);
236:                        op.filter(srcRas, wr);
237:                    } catch (Throwable t) {
238:                        t.printStackTrace();
239:                    }
240:                    return wr;
241:                }
242:
243:                ColorModel dstCM = getColorModel();
244:                if (srcCM.getColorSpace() == dstCM.getColorSpace()) {
245:                    // No transform needed, just reformat data...
246:                    // System.out.println("Bypassing");
247:
248:                    if (is_INT_PACK_COMP(srcSM))
249:                        src.copyData(wr);
250:                    else
251:                        GraphicsUtil.copyData(src.getData(wr.getBounds()), wr);
252:
253:                    return wr;
254:                }
255:
256:                Raster srcRas = src.getData(wr.getBounds());
257:                WritableRaster srcWr = (WritableRaster) srcRas;
258:
259:                // Divide out alpha if we have it.  We need to do this since
260:                // the color convert may not be a linear operation which may
261:                // lead to out of range values.
262:                ColorModel srcBICM = srcCM;
263:                if (srcCM.hasAlpha())
264:                    srcBICM = GraphicsUtil.coerceData(srcWr, srcCM, false);
265:
266:                BufferedImage srcBI, dstBI;
267:                srcBI = new BufferedImage(srcBICM, srcWr
268:                        .createWritableTranslatedChild(0, 0), false, null);
269:
270:                // System.out.println("src: " + srcBI.getWidth() + "x" +
271:                //                    srcBI.getHeight());
272:
273:                ColorConvertOp op = new ColorConvertOp(dstCM.getColorSpace(),
274:                        null);
275:                dstBI = op.filter(srcBI, null);
276:
277:                // System.out.println("After filter:");
278:
279:                WritableRaster wr00 = wr.createWritableTranslatedChild(0, 0);
280:                for (int i = 0; i < dstCM.getColorSpace().getNumComponents(); i++)
281:                    copyBand(dstBI.getRaster(), i, wr00, i);
282:
283:                if (dstCM.hasAlpha())
284:                    copyBand(srcWr, srcSM.getNumBands() - 1, wr,
285:                            getSampleModel().getNumBands() - 1);
286:                return wr;
287:            }
288:
289:            /**
290:             * This function 'fixes' the source's color model.  Right now
291:             * it just selects if it should have one or two bands based on
292:             * if the source had an alpha channel.
293:             */
294:            protected static ColorModel fixColorModel(CachableRed src) {
295:                ColorModel cm = src.getColorModel();
296:                if (cm != null) {
297:                    if (cm.hasAlpha())
298:                        return GraphicsUtil.sRGB_Unpre;
299:
300:                    return GraphicsUtil.sRGB;
301:                } else {
302:                    // No ColorModel so try to make some intelligent
303:                    // decisions based just on the number of bands...
304:                    // 1 bands -> replicated into RGB
305:                    // 2 bands -> Band 0 replicated into RGB & Band 1 -> alpha premult
306:                    // 3 bands -> sRGB (not-linear?)
307:                    // 4 bands -> sRGB premult (not-linear?)
308:                    SampleModel sm = src.getSampleModel();
309:
310:                    switch (sm.getNumBands()) {
311:                    case 1:
312:                        return GraphicsUtil.sRGB;
313:                    case 2:
314:                        return GraphicsUtil.sRGB_Unpre;
315:                    case 3:
316:                        return GraphicsUtil.sRGB;
317:                    }
318:                    return GraphicsUtil.sRGB_Unpre;
319:                }
320:            }
321:
322:            /**
323:             * This function 'fixes' the source's sample model.
324:             * Right now it just selects if it should have 3 or 4 bands
325:             * based on if the source had an alpha channel.
326:             */
327:            protected static SampleModel fixSampleModel(CachableRed src) {
328:                SampleModel sm = src.getSampleModel();
329:                ColorModel cm = src.getColorModel();
330:
331:                boolean alpha = false;
332:
333:                if (cm != null)
334:                    alpha = cm.hasAlpha();
335:                else {
336:                    switch (sm.getNumBands()) {
337:                    case 1:
338:                    case 3:
339:                        alpha = false;
340:                        break;
341:                    default:
342:                        alpha = true;
343:                        break;
344:                    }
345:                }
346:                if (alpha)
347:                    return new SinglePixelPackedSampleModel(
348:                            DataBuffer.TYPE_INT, sm.getWidth(), sm.getHeight(),
349:                            new int[] { 0xFF0000, 0xFF00, 0xFF, 0xFF000000 });
350:                else
351:                    return new SinglePixelPackedSampleModel(
352:                            DataBuffer.TYPE_INT, sm.getWidth(), sm.getHeight(),
353:                            new int[] { 0xFF0000, 0xFF00, 0xFF });
354:            }
355:        }
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