1
22
23 package com.liferay.portal.image;
24
25 import com.liferay.portal.kernel.image.SpriteProcessor;
26 import com.liferay.portal.kernel.log.Log;
27 import com.liferay.portal.kernel.log.LogFactoryUtil;
28 import com.liferay.portal.kernel.util.ArrayUtil;
29 import com.liferay.portal.kernel.util.FileUtil;
30 import com.liferay.portal.kernel.util.PropertiesUtil;
31 import com.liferay.portal.kernel.util.SortedProperties;
32 import com.liferay.portal.kernel.util.StringPool;
33 import com.liferay.portal.kernel.util.StringUtil;
34 import com.liferay.portal.kernel.util.Validator;
35
36 import java.awt.Point;
37 import java.awt.Transparency;
38 import java.awt.image.ColorModel;
39 import java.awt.image.DataBuffer;
40 import java.awt.image.DataBufferByte;
41 import java.awt.image.IndexColorModel;
42 import java.awt.image.Raster;
43 import java.awt.image.RenderedImage;
44 import java.awt.image.SampleModel;
45
46 import java.io.File;
47 import java.io.IOException;
48
49 import java.util.ArrayList;
50 import java.util.Collections;
51 import java.util.List;
52 import java.util.Properties;
53
54 import javax.imageio.ImageIO;
55
56 import javax.media.jai.JAI;
57 import javax.media.jai.LookupTableJAI;
58 import javax.media.jai.PlanarImage;
59 import javax.media.jai.RasterFactory;
60 import javax.media.jai.RenderedOp;
61 import javax.media.jai.TiledImage;
62 import javax.media.jai.operator.FileLoadDescriptor;
63 import javax.media.jai.operator.LookupDescriptor;
64 import javax.media.jai.operator.MosaicDescriptor;
65 import javax.media.jai.operator.TranslateDescriptor;
66
67
73 public class SpriteProcessorImpl implements SpriteProcessor {
74
75 static {
76 System.setProperty("com.sun.media.jai.disableMediaLib", "true");
77 }
78
79 public Properties generate(
80 List<File> images, String spriteFileName,
81 String spritePropertiesFileName, String spritePropertiesRootPath,
82 int maxHeight, int maxWidth, int maxSize)
83 throws IOException {
84
85 if (images.size() < 1) {
86 return null;
87 }
88
89 if (spritePropertiesRootPath.endsWith(StringPool.SLASH) ||
90 spritePropertiesRootPath.endsWith(StringPool.BACK_SLASH)) {
91
92 spritePropertiesRootPath = spritePropertiesRootPath.substring(
93 0, spritePropertiesRootPath.length() - 1);
94 }
95
96 File dir = images.get(0).getParentFile();
97
98 File spritePropertiesFile = new File(
99 dir.toString() + StringPool.SLASH + spritePropertiesFileName);
100
101 boolean build = false;
102
103 long lastModified = 0;
104
105 if (spritePropertiesFile.exists()) {
106 lastModified = spritePropertiesFile.lastModified();
107
108 for (File image : images) {
109 if (image.lastModified() > lastModified) {
110 build = true;
111
112 break;
113 }
114 }
115 }
116 else {
117 build = true;
118 }
119
120 if (!build) {
121 String spritePropertiesString = FileUtil.read(spritePropertiesFile);
122
123 if (Validator.isNull(spritePropertiesString)) {
124 return null;
125 }
126 else {
127 return PropertiesUtil.load(spritePropertiesString);
128 }
129 }
130
131 List<RenderedImage> renderedImages = new ArrayList<RenderedImage>();
132
133 Properties spriteProperties = new SortedProperties();
134
135 float x = 0;
136 float y = 0;
137
138 for (File file : images) {
139 if (file.length() > maxSize) {
140 continue;
141 }
142
143 try {
144 RenderedOp renderedOp = FileLoadDescriptor.create(
145 file.toString(), null, null, null);
146
147 RenderedImage renderedImage = convert(renderedOp);
148
149 int height = renderedImage.getHeight();
150 int width = renderedImage.getWidth();
151
152 if ((height <= maxHeight) && (width <= maxWidth)) {
153 renderedImage = TranslateDescriptor.create(
154 renderedImage, x, y, null, null);
155
156 renderedImages.add(renderedImage);
157
158 String key = StringUtil.replace(
159 file.toString(), StringPool.BACK_SLASH,
160 StringPool.SLASH);
161
162 key = key.substring(
163 spritePropertiesRootPath.toString().length());
164
165 String value = (int)y + "," + height + "," + width;
166
167 spriteProperties.setProperty(key, value);
168
169 y += renderedOp.getHeight();
170 }
171 }
172 catch (Exception e) {
173 if (_log.isWarnEnabled()) {
174 _log.warn("Unable to process " + file);
175 }
176
177 if (_log.isDebugEnabled()) {
178 _log.debug(e, e);
179 }
180 }
181 }
182
183 if (renderedImages.size() <= 1) {
184 renderedImages.clear();
185 spriteProperties.clear();
186 }
187 else {
188 RenderedOp renderedOp = MosaicDescriptor.create(
189 renderedImages.toArray(
190 new RenderedImage[renderedImages.size()]),
191 MosaicDescriptor.MOSAIC_TYPE_OVERLAY, null, null, null, null,
192 null);
193
194 File spriteFile = new File(
195 dir.toString() + StringPool.SLASH + spriteFileName);
196
197 ImageIO.write(renderedOp, "png", spriteFile);
198
199 if (lastModified > 0) {
200 spriteFile.setLastModified(lastModified);
201 }
202 }
203
204 FileUtil.write(
205 spritePropertiesFile, PropertiesUtil.toString(spriteProperties));
206
207 if (lastModified > 0) {
208 spritePropertiesFile.setLastModified(lastModified);
209 }
210
211 return spriteProperties;
212 }
213
214 protected RenderedImage convert(RenderedOp renderedOp) throws Exception {
215 RenderedImage renderedImage = renderedOp;
216
217 int height = renderedOp.getHeight();
218 int width = renderedOp.getWidth();
219
220 SampleModel sampleModel = renderedOp.getSampleModel();
221 ColorModel colorModel = renderedOp.getColorModel();
222
223 Raster raster = renderedOp.getData();
224
225 DataBuffer dataBuffer = raster.getDataBuffer();
226
227 if (colorModel instanceof IndexColorModel) {
228 IndexColorModel indexColorModel = (IndexColorModel)colorModel;
229
230 int mapSize = indexColorModel.getMapSize();
231
232 byte[][] data = new byte[4][mapSize];
233
234 indexColorModel.getReds(data[0]);
235 indexColorModel.getGreens(data[1]);
236 indexColorModel.getBlues(data[2]);
237 indexColorModel.getAlphas(data[3]);
238
239 LookupTableJAI lookupTableJAI = new LookupTableJAI(data);
240
241 renderedImage = LookupDescriptor.create(
242 renderedOp, lookupTableJAI, null);
243 }
244 else if (sampleModel.getNumBands() == 2) {
245 List<Byte> bytesList = new ArrayList<Byte>(
246 height * width * _NUM_OF_BANDS);
247
248 List<Byte> tempBytesList = new ArrayList<Byte>(_NUM_OF_BANDS);
249
250 for (int i = 0; i < dataBuffer.getSize(); i++) {
251 int mod = (i + 1) % 2;
252
253 int elemPos = i;
254
255 if (mod == 0) {
256 tempBytesList.add((byte)dataBuffer.getElem(elemPos - 1));
257 tempBytesList.add((byte)dataBuffer.getElem(elemPos - 1));
258 }
259
260 tempBytesList.add((byte)dataBuffer.getElem(elemPos));
261
262 if (mod == 0) {
263 Collections.reverse(tempBytesList);
264
265 bytesList.addAll(tempBytesList);
266
267 tempBytesList.clear();
268 }
269 }
270
271 byte[] data = ArrayUtil.toArray(
272 bytesList.toArray(new Byte[bytesList.size()]));
273
274 DataBuffer newDataBuffer = new DataBufferByte(data, data.length);
275
276 renderedImage = createRenderedImage(
277 renderedOp, height, width, newDataBuffer);
278 }
279 else if (colorModel.getTransparency() != Transparency.TRANSLUCENT) {
280 List<Byte> bytesList = new ArrayList<Byte>(
281 height * width * _NUM_OF_BANDS);
282
283 List<Byte> tempBytesList = new ArrayList<Byte>(_NUM_OF_BANDS);
284
285 for (int i = 0; i < dataBuffer.getSize(); i++) {
286 int mod = (i + 1) % 3;
287
288 int elemPos = i;
289
290 tempBytesList.add((byte)dataBuffer.getElem(elemPos));
291
292 if (mod == 0) {
293 tempBytesList.add((byte)255);
294
295 Collections.reverse(tempBytesList);
296
297 bytesList.addAll(tempBytesList);
298
299 tempBytesList.clear();
300 }
301 }
302
303 byte[] data = ArrayUtil.toArray(
304 bytesList.toArray(new Byte[bytesList.size()]));
305
306 DataBuffer newDataBuffer = new DataBufferByte(data, data.length);
307
308 renderedImage = createRenderedImage(
309 renderedOp, height, width, newDataBuffer);
310 }
311
312 return renderedImage;
313 }
314
315 protected RenderedImage createRenderedImage(
316 RenderedOp renderedOp, int height, int width, DataBuffer dataBuffer) {
317
318 SampleModel sampleModel =
319 RasterFactory.createPixelInterleavedSampleModel(
320 DataBuffer.TYPE_BYTE, width, height, _NUM_OF_BANDS);
321 ColorModel colorModel = PlanarImage.createColorModel(sampleModel);
322
323 TiledImage tiledImage = new TiledImage(
324 0, 0, width, height, 0, 0, sampleModel, colorModel);
325
326 Raster raster = RasterFactory.createWritableRaster(
327 sampleModel, dataBuffer, new Point(0, 0));
328
329 tiledImage.setData(raster);
330
331 if (false) {
332 JAI.create("filestore", tiledImage, "test.png", "PNG");
333
334 printImage(renderedOp);
335 printImage(tiledImage);
336 }
337
338 return tiledImage;
339 }
340
341 protected void printImage(PlanarImage planarImage) {
342 SampleModel sampleModel = planarImage.getSampleModel();
343
344 int height = planarImage.getHeight();
345 int width = planarImage.getWidth();
346 int numOfBands = sampleModel.getNumBands();
347
348 int[] pixels = new int[height * width * numOfBands];
349
350 Raster raster = planarImage.getData();
351
352 raster.getPixels(0, 0, width, height, pixels);
353
354 int offset = 0;
355
356 for (int h = 0; h < height; h++) {
357 for (int w = 0; w < width; w++) {
358 offset = (h * width * numOfBands) + (w * numOfBands);
359
360 System.out.print("[" + w + ", " + h + "] = ");
361
362 for (int b = 0; b < numOfBands; b++) {
363 System.out.print(pixels[offset + b] + " ");
364 }
365 }
366
367 System.out.println();
368 }
369 }
370
371 private static final int _NUM_OF_BANDS = 4;
372
373 private static Log _log = LogFactoryUtil.getLog(SpriteProcessorImpl.class);
374
375 }