Mercurial > hg > digilib-old

comparison servlet/src/digilib/image/JAIDocuImage.java @ 570:fd2ef7e46119

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
more cleanup, set version to 1.8.2
author robcast
date Tue, 21 Dec 2010 20:24:09 +0100
parents 4c51d71aef13
children beeedf90cb81
comparison
equal deleted inserted replaced
569:1f666c2b4578 570:fd2ef7e46119
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 51
51 /** A DocuImage implementation using Java Advanced Imaging Library. */ 52 /** A DocuImage implementation using Java Advanced Imaging Library. */
53 /**
54 * @author casties
55 *
56 */
52 public class JAIDocuImage extends ImageInfoDocuImage { 57 public class JAIDocuImage extends ImageInfoDocuImage {
53 58
54 protected RenderedImage img; 59 protected RenderedImage img;
55 60
56 protected Interpolation interpol = null; 61 protected Interpolation interpol = null;
172 mimeType = f.getMimetype(); 177 mimeType = f.getMimetype();
173 } 178 }
174 } 179 }
175 180
176 /* Write the current image to an OutputStream. */ 181 /* Write the current image to an OutputStream. */
177 public void writeImage(String mt, OutputStream ostream) 182 public void writeImage(String mt, OutputStream ostream) throws ServletException, ImageOpException {
178 throws FileOpException {
179 try { 183 try {
180 // setup output 184 // setup output
181 ParameterBlock pb3 = new ParameterBlock(); 185 ParameterBlock pb3 = new ParameterBlock();
182 pb3.addSource(img); 186 pb3.addSource(img);
183 pb3.add(ostream); 187 pb3.add(ostream);
185 pb3.add("JPEG"); 189 pb3.add("JPEG");
186 } else if (mt == "image/png") { 190 } else if (mt == "image/png") {
187 pb3.add("PNG"); 191 pb3.add("PNG");
188 } else { 192 } else {
189 // unknown mime type 193 // unknown mime type
190 throw new FileOpException("Unknown mime type: " + mt); 194 throw new ImageOpException("Unknown mime type: " + mt);
191 } 195 }
192 // render output 196 // render output
193 JAI.create("encode", pb3); 197 JAI.create("encode", pb3);
194 198
195 } catch (IOException e) { 199 } catch (RuntimeException e) {
196 throw new FileOpException("Error writing image."); 200 // JAI likes to throw RuntimeExceptions
197 } 201 throw new ServletException("Error writing image:", e);
198 } 202 }
199 203 }
200 /** 204
201 * The width of the curent image in pixel. 205 /* returns the current image size
202 * 206 * @see digilib.image.DocuImageImpl#getSize()
203 * @return Image width in pixels. 207 */
204 */ 208 public ImageSize getSize() {
205 public int getWidth() { 209 ImageSize is = null;
206 if (img != null) { 210 // TODO: do we want to cache imgSize?
207 return img.getWidth(); 211 int h = 0;
208 } 212 int w = 0;
209 return 0; 213 if (img != null) {
210 } 214 // get size from image
211 215 h = img.getHeight();
212 /** 216 w = img.getWidth();
213 * The height of the curent image in pixel. 217 is = new ImageSize(w, h);
214 * 218 }
215 * @return Image height in pixels. 219 return is;
216 */ 220 }
217 public int getHeight() {
218 if (img != null) {
219 return img.getHeight();
220 }
221 return 0;
222 }
223 221
224 /* scales the current image */ 222 /* scales the current image */
225 public void scale(double scale, double scaleY) throws ImageOpException { 223 public void scale(double scale, double scaleY) throws ImageOpException {
226 logger.debug("scale"); 224 logger.debug("scale");
227 if ((scale < 1) && (img.getColorModel().getPixelSize() == 1) 225 if ((scale < 1) && (img.getColorModel().getPixelSize() == 1)