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1
29 package Acme.JPM.Encoders;
30
31 import java.awt.*;
32 import java.awt.image.ColorModel  ;
33 import java.awt.image.ImageConsumer ;
34 import java.awt.image.ImageProducer ;
35 import java.io.IOException ;
36 import java.io.OutputStream ;
37 import java.util.Hashtable ;
38
39
57 public abstract class ImageEncoder implements ImageConsumer {
58
59 protected OutputStream out;
60
61 private ImageProducer producer;
62 private int width = -1;
63 private int height = -1;
64 private int hintflags = 0;
65 private boolean started = false;
66 private boolean encoding;
67 private IOException iox;
68 private static final ColorModel rgbModel = ColorModel.getRGBdefault();
69 private Hashtable props = null;
70
71 public ImageEncoder(Image img, OutputStream out) throws IOException {
75 this(img.getSource(), out);
76 }
77
78 public ImageEncoder(ImageProducer producer, OutputStream out) throws IOException {
82 this.producer = producer;
83 this.out = out;
84 }
85
86
87
89 abstract void encodeStart(int w, int h) throws IOException ;
91
92 abstract void encodePixels(int x, int y, int w, int h, int[] rgbPixels, int off, int scansize)
97 throws IOException ;
98
99 abstract void encodeDone() throws IOException ;
101
102
103
105 public synchronized void encode() throws IOException {
107 encoding = true;
108 iox = null;
109 producer.startProduction(this);
110 while (encoding)
111 try {
112 wait();
113 } catch (InterruptedException e) {}
114 if (iox != null)
115 throw iox;
116 }
117
118 private boolean accumulate = false;
119 private int[] accumulator;
120
121 private void encodePixelsWrapper(int x, int y, int w, int h, int[] rgbPixels, int off, int scansize)
122 throws IOException {
123 if (!started) {
124 started = true;
125 encodeStart(width, height);
126 if ((hintflags & TOPDOWNLEFTRIGHT) == 0) {
127 accumulate = true;
128 accumulator = new int[width * height];
129 }
130 }
131 if (accumulate)
132 for (int row = 0; row < h; ++row)
133 System.arraycopy(rgbPixels, row * scansize + off,
134 accumulator, (y + row) * width + x,
135 w);
136 else
137 encodePixels(x, y, w, h, rgbPixels, off, scansize);
138 }
139
140 private void encodeFinish() throws IOException {
141 if (accumulate) {
142 encodePixels(0, 0, width, height, accumulator, 0, width);
143 accumulator = null;
144 accumulate = false;
145 }
146 }
147
148 private synchronized void stop() {
149 encoding = false;
150 notifyAll();
151 }
152
153
154
156 public void setDimensions(int width, int height) {
157 this.width = width;
158 this.height = height;
159 }
160
161 public void setProperties(Hashtable props) {
162 this.props = props;
163 }
164
165 public void setColorModel(ColorModel model) {
166 }
168
169 public void setHints(int hintflags) {
170 this.hintflags = hintflags;
171 }
172
173 public void setPixels(int x, int y, int w, int h, ColorModel model, byte[] pixels,
174 int off, int scansize) {
175 int[] rgbPixels = new int[w];
176 for (int row = 0; row < h; ++row) {
177 int rowOff = off + row * scansize;
178 for (int col = 0; col < w; ++col)
179 rgbPixels[col] = model.getRGB(pixels[rowOff + col] & 0xff);
180 try {
181 encodePixelsWrapper(x, y + row, w, 1, rgbPixels, 0, w);
182 } catch (IOException e) {
183 iox = e;
184 stop();
185 return;
186 }
187 }
188 }
189
190 public void setPixels(int x, int y, int w, int h, ColorModel model, int[] pixels,
191 int off, int scansize) {
192 if (model == rgbModel) {
193 try {
194 encodePixelsWrapper(x, y, w, h, pixels, off, scansize);
195 } catch (IOException e) {
196 iox = e;
197 stop();
198 return;
199 }
200 } else {
201 int[] rgbPixels = new int[w];
202 for (int row = 0; row < h; ++row) {
203 int rowOff = off + row * scansize;
204 for (int col = 0; col < w; ++col)
205 rgbPixels[col] = model.getRGB(pixels[rowOff + col]);
206 try {
207 encodePixelsWrapper(x, y + row, w, 1, rgbPixels, 0, w);
208 } catch (IOException e) {
209 iox = e;
210 stop();
211 return;
212 }
213 }
214 }
215 }
216
217 public void imageComplete(int status) {
218 producer.removeConsumer(this);
219 if (status == ImageConsumer.IMAGEABORTED)
220 iox = new IOException ("image aborted");
221 else {
222 try {
223 encodeFinish();
224 encodeDone();
225 } catch (IOException e) {
226 iox = e;
227 }
228 }
229 stop();
230 }
231
232 }
233 |
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