1
22
23 package com.liferay.portal.image;
24
25 import com.liferay.portal.kernel.image.ImageBag;
26 import com.liferay.portal.kernel.image.ImageProcessor;
27 import com.liferay.portal.kernel.util.JavaProps;
28 import com.liferay.portal.util.FileImpl;
29
30 import com.sun.media.jai.codec.ImageCodec;
31 import com.sun.media.jai.codec.ImageDecoder;
32
33 import java.awt.Graphics2D;
34 import java.awt.Image;
35 import java.awt.image.BufferedImage;
36 import java.awt.image.DataBuffer;
37 import java.awt.image.IndexColorModel;
38 import java.awt.image.RenderedImage;
39 import java.awt.image.SampleModel;
40
41 import java.io.ByteArrayInputStream;
42 import java.io.File;
43 import java.io.IOException;
44 import java.io.OutputStream;
45
46 import java.util.Enumeration;
47
48 import javax.imageio.ImageIO;
49
50 import javax.media.jai.RenderedImageAdapter;
51
52 import net.jmge.gif.Gif89Encoder;
53
54 import org.apache.commons.logging.Log;
55 import org.apache.commons.logging.LogFactory;
56
57
63 public class ImageProcessorImpl implements ImageProcessor {
64
65 public static ImageProcessorImpl getInstance() {
66 return _instance;
67 }
68
69 public BufferedImage convertImageType(BufferedImage sourceImage, int type) {
70 BufferedImage targetImage = new BufferedImage(
71 sourceImage.getWidth(), sourceImage.getHeight(), type);
72
73 Graphics2D graphics = targetImage.createGraphics();
74
75 graphics.drawRenderedImage(sourceImage, null);
76 graphics.dispose();
77
78 return targetImage;
79 }
80
81 public void encodeGIF(RenderedImage renderedImage, OutputStream os)
82 throws IOException {
83
84 if (JavaProps.isJDK6()) {
85 ImageIO.write(renderedImage, "GIF", os);
86 }
87 else {
88 BufferedImage bufferedImage = getBufferedImage(renderedImage);
89
90 if (!(bufferedImage.getColorModel() instanceof IndexColorModel)) {
91 bufferedImage = convertImageType(
92 bufferedImage, BufferedImage.TYPE_BYTE_INDEXED);
93 }
94
95 Gif89Encoder encoder = new Gif89Encoder(bufferedImage);
96
97 encoder.encode(os);
98 }
99 }
100
101 public void encodeWBMP(RenderedImage renderedImage, OutputStream os)
102 throws IOException {
103
104 BufferedImage bufferedImage = getBufferedImage(renderedImage);
105
106 SampleModel sampleModel = bufferedImage.getSampleModel();
107
108 int type = sampleModel.getDataType();
109
110 if ((bufferedImage.getType() != BufferedImage.TYPE_BYTE_BINARY) ||
111 (type < DataBuffer.TYPE_BYTE) || (type > DataBuffer.TYPE_INT) ||
112 (sampleModel.getNumBands() != 1) ||
113 (sampleModel.getSampleSize(0) != 1)) {
114
115 BufferedImage binaryImage = new BufferedImage(
116 bufferedImage.getWidth(), bufferedImage.getHeight(),
117 BufferedImage.TYPE_BYTE_BINARY);
118
119 binaryImage.getGraphics().drawImage(bufferedImage, 0, 0, null);
120
121 renderedImage = binaryImage;
122 }
123
124 if (!ImageIO.write(renderedImage, "wbmp", os)) {
125
126
128 os.write(0);
129 os.write(0);
130 os.write(_toMultiByte(bufferedImage.getWidth()));
131 os.write(_toMultiByte(bufferedImage.getHeight()));
132
133 DataBuffer dataBuffer = bufferedImage.getData().getDataBuffer();
134
135 int size = dataBuffer.getSize();
136
137 for (int i = 0; i < size; i++) {
138 os.write((byte)dataBuffer.getElem(i));
139 }
140 }
141 }
142
143 public BufferedImage getBufferedImage(RenderedImage renderedImage) {
144 if (renderedImage instanceof BufferedImage) {
145 return (BufferedImage)renderedImage;
146 }
147 else {
148 RenderedImageAdapter adapter = new RenderedImageAdapter(
149 renderedImage);
150
151 return adapter.getAsBufferedImage();
152 }
153 }
154
155 public ImageBag read(File file) throws IOException {
156 return read(_fileUtil.getBytes(file));
157 }
158
159 public ImageBag read(byte[] bytes) {
160 RenderedImage renderedImage = null;
161 String type = TYPE_NOT_AVAILABLE;
162
163 Enumeration<ImageCodec> enu = ImageCodec.getCodecs();
164
165 while (enu.hasMoreElements()) {
166 ImageCodec codec = enu.nextElement();
167
168 if (codec.isFormatRecognized(bytes)) {
169 type = codec.getFormatName();
170
171 ImageDecoder decoder = ImageCodec.createImageDecoder(
172 type, new ByteArrayInputStream(bytes), null);
173
174 try {
175 renderedImage = decoder.decodeAsRenderedImage();
176 }
177 catch (IOException ioe) {
178 if (_log.isDebugEnabled()) {
179 _log.debug(type + ": " + ioe.getMessage());
180 }
181 }
182
183 break;
184 }
185 }
186
187 if (type.equals("jpeg")) {
188 type = ImageProcessor.TYPE_JPEG;
189 }
190
191 return new ImageBag(renderedImage, type);
192 }
193
194 public RenderedImage scale(
195 RenderedImage renderedImage, int maxHeight, int maxWidth) {
196
197 int imageHeight = renderedImage.getHeight();
198 int imageWidth = renderedImage.getWidth();
199
200 if (maxHeight == 0) {
201 maxHeight = imageHeight;
202 }
203
204 if (maxWidth == 0) {
205 maxWidth = imageWidth;
206 }
207
208 if ((imageHeight <= maxHeight) && (imageWidth <= maxWidth)) {
209 return renderedImage;
210 }
211
212 double factor = Math.min(
213 (double)maxHeight / imageHeight, (double)maxWidth / imageWidth);
214
215 int scaledHeight = Math.max(1, (int)(factor * imageHeight));
216 int scaledWidth = Math.max(1, (int)(factor * imageWidth));
217
218 BufferedImage bufferedImage = getBufferedImage(renderedImage);
219
220 Image scaledImage = bufferedImage.getScaledInstance(
221 scaledWidth, scaledHeight, Image.SCALE_SMOOTH);
222
223 BufferedImage scaledBufferedImage = new BufferedImage(
224 scaledWidth, scaledHeight, BufferedImage.TYPE_INT_RGB);
225
226 scaledBufferedImage.getGraphics().drawImage(scaledImage, 0, 0, null);
227
228 return scaledBufferedImage;
229 }
230
231 private byte[] _toMultiByte(int intValue) {
232 int numBits = 32;
233 int mask = 0x80000000;
234
235 while (mask != 0 && (intValue & mask) == 0) {
236 numBits--;
237 mask >>>= 1;
238 }
239
240 int numBitsLeft = numBits;
241 byte[] multiBytes = new byte[(numBitsLeft + 6) / 7];
242
243 int maxIndex = multiBytes.length - 1;
244
245 for (int b = 0; b <= maxIndex; b++) {
246 multiBytes[b] = (byte)((intValue >>> ((maxIndex - b) * 7)) & 0x7f);
247
248 if (b != maxIndex) {
249 multiBytes[b] |= (byte)0x80;
250 }
251 }
252
253 return multiBytes;
254 }
255
256 private static Log _log = LogFactory.getLog(ImageProcessorImpl.class);
257
258 private static ImageProcessorImpl _instance = new ImageProcessorImpl();
259
260 private static FileImpl _fileUtil = FileImpl.getInstance();
261
262 }