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comparison servlet/src/digilib/image/JAIDocuImage.java @ 573:beeedf90cb81 stream

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Merge from HEAD fd2ef7e461198ef4a9d9a02459be2057038d600d
author robcast
date Wed, 22 Dec 2010 09:54:34 +0100
parents 50f291d808b1 fd2ef7e46119
children 790cbfb58b52
comparison
equal deleted inserted replaced
568:34701340922e 573:beeedf90cb81
38 import javax.media.jai.KernelJAI; 38 import javax.media.jai.KernelJAI;
39 import javax.media.jai.ParameterBlockJAI; 39 import javax.media.jai.ParameterBlockJAI;
40 import javax.media.jai.RenderedOp; 40 import javax.media.jai.RenderedOp;
41 import javax.media.jai.operator.TransposeDescriptor; 41 import javax.media.jai.operator.TransposeDescriptor;
42 import javax.media.jai.operator.TransposeType; 42 import javax.media.jai.operator.TransposeType;
43 import javax.servlet.ServletException;
43 44
44 import com.sun.media.jai.codec.ImageCodec; 45 import com.sun.media.jai.codec.ImageCodec;
45 46
46 import digilib.io.FileOpException; 47 import digilib.io.FileOpException;
47 import digilib.io.FileOps; 48 import digilib.io.FileOps;
48 import digilib.io.ImageFile; 49 import digilib.io.ImageFile;
49 import digilib.io.ImageFileset; 50 import digilib.io.ImageFileset;
50 import digilib.io.ImageInput; 51 import digilib.io.ImageInput;
51 52
52 /** A DocuImage implementation using Java Advanced Imaging Library. */ 53 /** A DocuImage implementation using Java Advanced Imaging Library. */
54 /**
55 * @author casties
56 *
57 */
53 public class JAIDocuImage extends ImageInfoDocuImage { 58 public class JAIDocuImage extends ImageInfoDocuImage {
54 59
55 protected RenderedImage img; 60 protected RenderedImage img;
56 61
57 protected Interpolation interpol = null; 62 protected Interpolation interpol = null;
173 mimeType = f.getMimetype(); 178 mimeType = f.getMimetype();
174 } 179 }
175 } 180 }
176 181
177 /* Write the current image to an OutputStream. */ 182 /* Write the current image to an OutputStream. */
178 public void writeImage(String mt, OutputStream ostream) 183 public void writeImage(String mt, OutputStream ostream) throws ServletException, ImageOpException {
179 throws FileOpException {
180 try { 184 try {
181 // setup output 185 // setup output
182 ParameterBlock pb3 = new ParameterBlock(); 186 ParameterBlock pb3 = new ParameterBlock();
183 pb3.addSource(img); 187 pb3.addSource(img);
184 pb3.add(ostream); 188 pb3.add(ostream);
186 pb3.add("JPEG"); 190 pb3.add("JPEG");
187 } else if (mt == "image/png") { 191 } else if (mt == "image/png") {
188 pb3.add("PNG"); 192 pb3.add("PNG");
189 } else { 193 } else {
190 // unknown mime type 194 // unknown mime type
191 throw new FileOpException("Unknown mime type: " + mt); 195 throw new ImageOpException("Unknown mime type: " + mt);
192 } 196 }
193 // render output 197 // render output
194 JAI.create("encode", pb3); 198 JAI.create("encode", pb3);
195 199
196 } catch (IOException e) { 200 } catch (RuntimeException e) {
197 throw new FileOpException("Error writing image."); 201 // JAI likes to throw RuntimeExceptions
198 } 202 throw new ServletException("Error writing image:", e);
199 } 203 }
200 204 }
201 /** 205
202 * The width of the curent image in pixel. 206 /* returns the current image size
203 * 207 * @see digilib.image.DocuImageImpl#getSize()
204 * @return Image width in pixels. 208 */
205 */ 209 public ImageSize getSize() {
206 public int getWidth() { 210 ImageSize is = null;
207 if (img != null) { 211 // TODO: do we want to cache imgSize?
208 return img.getWidth(); 212 int h = 0;
209 } 213 int w = 0;
210 return 0; 214 if (img != null) {
211 } 215 // get size from image
212 216 h = img.getHeight();
213 /** 217 w = img.getWidth();
214 * The height of the curent image in pixel. 218 is = new ImageSize(w, h);
215 * 219 }
216 * @return Image height in pixels. 220 return is;
217 */ 221 }
218 public int getHeight() {
219 if (img != null) {
220 return img.getHeight();
221 }
222 return 0;
223 }
224 222
225 /* scales the current image */ 223 /* scales the current image */
226 public void scale(double scale, double scaleY) throws ImageOpException { 224 public void scale(double scale, double scaleY) throws ImageOpException {
227 logger.debug("scale"); 225 logger.debug("scale");
228 if ((scale < 1) && (img.getColorModel().getPixelSize() == 1) 226 if ((scale < 1) && (img.getColorModel().getPixelSize() == 1)