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1
25
26 package org.jresearch.gossip.util;
27
28 import java.awt.Color  ;
29 import java.awt.Font ;
30 import java.awt.GradientPaint ;
31 import java.awt.Graphics2D ;
32 import java.awt.RenderingHints ;
33 import java.awt.geom.AffineTransform ;
34 import java.awt.image.AffineTransformOp ;
35 import java.awt.image.BufferedImage ;
36 import java.awt.image.RenderedImage ;
37 import java.io.File ;
38 import java.io.FileNotFoundException ;
39 import java.io.FileOutputStream ;
40 import java.io.IOException ;
41 import java.io.OutputStream ;
42
43 import javax.imageio.ImageIO ;
44 import javax.servlet.ServletOutputStream ;
45
46 import org.jresearch.gossip.IConst;
47 import org.jresearch.gossip.configuration.Configurator;
48 import org.jresearch.gossip.exception.SystemException;
49
50 import com.sun.image.codec.jpeg.JPEGCodec;
51 import com.sun.image.codec.jpeg.JPEGImageEncoder;
52
53
60 public class PictureGenerator {
61
62 private static PictureGenerator instance = null;
63
64 private BufferedImage image;
65
66 private Graphics2D g;
67
68 private GradientPaint gradient;
69
70 private int height = 30;
71
72 private int width = 200;
73
74 private int grid = (int) (height / 3.1);
75
76 private int maxH = 150;
77
78 private int maxW = 150;
79
80 private int thumbH = 150;
81
82 private int thumbW = 150;
83
84 private static Object lock = new Object ();
85
86
92 public static PictureGenerator getInstance() throws SystemException {
93
94 if (instance == null) {
95 synchronized (lock) {
96 if (instance == null) {
97 instance = new PictureGenerator();
98 }
99 }
100 }
101
102 return instance;
103 }
104
105 private PictureGenerator() throws SystemException {
106
107 try {
108 Configurator config = Configurator.getInstance();
109 int newHeight = config
110 .getInt(IConst.MISC.REGISTRATION_PICTURE_HEIGHT);
111 int newWidth = config
112 .getInt(IConst.MISC.REGISTRATION_PICTURE_WIDTH);
113 int newGrid = config.getInt(IConst.MISC.REGISTRATION_PICTURE_GRID);
114
115 int newMaxH = config.getInt(IConst.MISC.AVATAR_HEIGHT);
116 int newMaxW = config.getInt(IConst.MISC.AVATAR_WIDTH);
117
118 int newThunbH = config.getInt(IConst.MISC.THUMBNAIL_HEIGHT);
119 int newThunbW = config.getInt(IConst.MISC.THUMBNAIL_WIDTH);
120
121 maxH = newMaxH;
122 maxW = newMaxW;
123
124 thumbH = newThunbH;
125 thumbW = newThunbW;
126
127 height = newHeight;
128 width = newWidth;
129 grid = newGrid;
130 } catch (Throwable e) {
131
132 }
133
134 image = new BufferedImage (width, height, BufferedImage.TYPE_INT_RGB);
135 g = image.createGraphics();
136 g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
137 RenderingHints.VALUE_ANTIALIAS_ON);
138 g.setFont(new Font ("Dialog", Font.BOLD, (int) (height * 0.9)));
139 gradient = new GradientPaint (0, 0, Color.WHITE, width - 1, height - 1,
140 Color.GRAY);
141 }
142
143
148 public int getHeight() {
149 return height;
150 }
151
152
157 public int getWidth() {
158 return width;
159 }
160
161
169 public void generatePicture(String label, OutputStream out)
170 throws IOException {
171
172
173 g.setPaint(gradient);
174 g.fillRect(0, 0, width - 1, height - 1);
175
176 g.setColor(Color.BLACK);
177 g.drawString(label,
178 (width - g.getFontMetrics().stringWidth(label)) / 2,
179 (int) (height * 0.85));
180
181
182
183 g.setColor(Color.BLACK);
184 for (int y = (int) (grid / 2); y < height; y += grid) {
185 g.drawLine(0, y, width, y);
186 }
187
188
189 for (int x = (int) (grid / 2); x < width; x += grid) {
190 g.drawLine(x, 0, x, height);
191 }
192 ImageIO.write((RenderedImage ) image, "jpeg", out);
193 }
194
195
200 public void prepareImage(BufferedImage img, OutputStream out)
201 throws IOException {
202 JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
203
204 int h = img.getHeight();
205 int w = img.getWidth();
206
207 if (h > this.maxH || w > this.maxW) {
208 int fullH = h;
209 int fullW = w;
210 double d = (double) h / (double) w;
211 if (h > this.maxH) {
212 h = this.maxH;
213 w = (int) Math.round(h / d);
214 }
215 if (w > this.maxW) {
216 w = this.maxW;
217 h = (int) Math.round(w * d);
218 }
219
220 AffineTransform xform = AffineTransform.getScaleInstance((double) h
221 / (double) fullH, (double) w / (double) fullW);
222 AffineTransformOp op = new AffineTransformOp (xform,
223 AffineTransformOp.TYPE_NEAREST_NEIGHBOR);
224 BufferedImage newImage = new BufferedImage (w, h,
225 BufferedImage.TYPE_INT_RGB);
226 Graphics2D gr = newImage.createGraphics();
227 int top = 0;
228 int left = 0;
229 gr.drawImage(img, op, left, top);
230 ImageIO.write((RenderedImage ) newImage, "jpeg", out);
231 } else {
232 ImageIO.write((RenderedImage ) img, "jpeg", out);
233 }
234
235 }
236
237
242 public void prepareImageThumbnail(BufferedImage img, ServletOutputStream out)
243 throws IOException {
244 JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
245
246 int h = img.getHeight();
247 int w = img.getWidth();
248
249 int fullH = h;
250 int fullW = w;
251 double d = (double) h / (double) w;
252 if (h > this.thumbH) {
253 h = this.thumbH;
254 w = (int) Math.round(h / d);
255 }
256 if (w > this.thumbW) {
257 w = this.thumbW;
258 h = (int) Math.round(w * d);
259 }
260
261 AffineTransform xform = AffineTransform.getScaleInstance((double) h
262 / (double) fullH, (double) w / (double) fullW);
263 AffineTransformOp op = new AffineTransformOp (xform,
264 AffineTransformOp.TYPE_NEAREST_NEIGHBOR);
265 BufferedImage newImage = new BufferedImage (this.thumbW, this.thumbH,
266 BufferedImage.TYPE_INT_RGB);
267 Graphics2D gr = newImage.createGraphics();
268 gr.setColor(Color.BLACK);
269 g.fillRect(0, 0, this.thumbH - 1, this.thumbW - 1);
270 int top = (this.thumbH - h) / 2;
271 int left = (this.thumbW - w) / 2;
272 gr.drawImage(img, op, left, top);
273 ImageIO.write((RenderedImage ) newImage, "jpeg", out);
274
275 }
276
277 public static void main(String [] args) { String label = "PictureGeneratorTest" + System.currentTimeMillis()
279 + ".jpg";
280 File out = new File (label);
281 try {
282 getInstance().generatePicture(label, new FileOutputStream (out));
283 } catch (SystemException e) {
284 e.printStackTrace();
285 } catch (FileNotFoundException e) {
286 e.printStackTrace();
287 } catch (IOException e) {
288 e.printStackTrace();
289 }
290 }
291 }
292 |
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