Revision 130 trunk/libraries/libCq CMS for java.old/src/org/cresques/io/EcwFile.java
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import java.awt.image.BufferedImage; |
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import com.ermapper.ecw.JNCSFile; |
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import com.ermapper.ecw.JNCSProgressiveUpdate; |
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import com.ermapper.util.JNCSDatasetPoint; |
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import org.cresques.cts.ICoordTrans; |
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/** |
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* Soporte para los ficheros .ecw de ErMapper |
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* |
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* NOTA: El SDK que ermapper ha puesto a disposici?n del p?blico en java |
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* es una versi?n 2.45, de 19/11/2001. Est? implementada usando JNI que |
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* se apoya en tres librer?as din?micas (dll), y presenta deficiencias |
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* muy graves a la hora de acceder a la informaci?n. Hasta el momento |
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* hemos detectado 3 de ellas: |
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* 1?.- No soporta ampliaciones superiores a 1:1. si se intenta acceder |
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* a un ecw con un zoom mayor da una excepci?n del tipo |
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* com.ermapper.ecw.JNCSInvalidSetViewException, que de no ser tenida encuenta |
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* acaba tirando abajo la m?quina virtual de java. |
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* 2?.- La longitud m?xima de l?nea que adminte el m?todo readLineRGBA es |
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* de unos 2500 pixeles, lo que hace el uso para la impresi?n en formatos |
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* superiorea a A4 a 300 ppp o m?s inviable. |
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* 3?.- La actualizaci?n progresiva usando el interface JNCSProgressiveUpdate |
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* con el JNCSFile hace que el equipo genere un error severo y se apague. Este |
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* error imposibilita esta t?cnica de acceso a ECW. |
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* |
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* @author "Luis W. Sevilla" <sevilla_lui@gva.es> |
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*/ |
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public class EcwFile extends GeoRasterFile {
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JNCSFile file = null; |
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boolean bErrorOnOpen = false; |
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String errorMessage = null; |
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public class EcwFile extends GeoRasterFile implements JNCSProgressiveUpdate {
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private JNCSFile file = null;
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private boolean bErrorOnOpen = false;
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private String errorMessage = null;
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Extent v = null; |
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boolean doTransparency = false; |
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PixelFilter tFilter = null; |
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private Extent v = null;
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private boolean doTransparency = false;
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private PixelFilter tFilter = null;
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// Ultimo porcentaje de refresco. Se carga en el update y se |
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// actualiza en el refreshUpdate |
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private int lastRefreshPercent = 0; |
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public EcwFile(IProjection proj, String fName) {
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super(proj, null); |
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fName = DataSource.normalize(fName); |
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extent = new Extent(); |
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try {
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System.err.println("Abriendo "+fName);
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file = new JNCSFile(fName, false); |
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file = new JNCSFile(fName, true); |
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file.addProgressiveUpdateListener(this); |
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load(); |
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} catch(Exception e) {
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bErrorOnOpen = true; |
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file.close(true); |
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file = null; |
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} |
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public int getWidth() { return file.width; }
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public int getHeight() { return file.height; }
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/** |
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* Obtiene un trozo de imagen (determinado por la vista y los par?metros. |
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* @param height |
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*/ |
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public Image updateImage(int width, int height, ICoordTrans rp) {
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// TODO reproyectar |
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public synchronized Image updateImage(int width, int height, ICoordTrans rp) {
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// TODO reproyectar para devolver el trozo de imagen pedida sobre ... |
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// la proyecci?n de destino. |
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BufferedImage ecwImage = null; |
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if (file != null) {
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try {
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if (file == null) return ecwImage;
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try {
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double dFileAspect, dWindowAspect; |
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//double dWorldTLX, dWorldTLY, dWorldBRX, dWorldBRY; |
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int bandlist[]; |
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JNCSDatasetPoint ptMax = file.convertWorldToDataset(v.maxX(), v.maxY()); |
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System.out.println("Dataset coords Width = "+(ptMax.x-ptMin.x)+", px width ="+width);
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// Set the view |
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try {
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file.setView(file.numBands, bandlist, |
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v.minX(), v.maxY(), v.maxX(), v.minY(), |
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width, height); |
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} catch (com.ermapper.ecw.JNCSInvalidSetViewException e) {
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System.err.println(errorMessage); |
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e.printStackTrace(); |
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} |
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file.setView(file.numBands, bandlist, |
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v.minX(), v.maxY(), v.maxX(), v.minY(), |
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width, height); |
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// Read the scan lines |
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for (line=0; line < height; line++) {
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file.readLineRGBA(pRGBArray);
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// Prueba de sustituci?n de color transparente
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if (doTransparency) {
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file.readLineRGBA(pRGBArray);
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// Prueba de sustituci?n de color transparente
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if (doTransparency) {
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if (line == 0) tFilter.debug = true; |
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tFilter.filterLine(pRGBArray); |
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tFilter.debug = false; |
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} |
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ecwImage.setRGB(0, line, width, 1, pRGBArray, 0, width); |
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} |
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ecwImage.setRGB(0, line, width, 1, pRGBArray, 0, width); |
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} |
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updateImage(width, height); |
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} catch(Exception e) {
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/* |
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* La excepci?n atrapada es la de 'zoom > 1:1 no valido' |
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} catch (com.ermapper.ecw.JNCSInvalidSetViewException e) {
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System.err.println(errorMessage); |
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e.printStackTrace(); */ |
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} catch(Exception e) {
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bErrorOnOpen = true; |
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errorMessage = e.getMessage(); |
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// g.drawString(errorMessage, 0, 50); |
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System.err.println(errorMessage); |
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e.printStackTrace(); |
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} |
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} |
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lastRefreshPercent = file.getPercentComplete(); |
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return ecwImage; |
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} |
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private void updateImage(int width, int height) {
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} |
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/** |
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* Cambia el raster de proyecci?n.
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* Reproyecta el raster.
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*/ |
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public void reProject(ICoordTrans rp) {
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// TODO metodo reProject pendiente de implementar |
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} |
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/** |
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* Soporte para actualizaci?n de la imagen |
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* @see com.ermapper.ecw.JNCSProgressiveUpdate#refreshUpdate(int, int, double, double, double, double) |
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*/ |
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public void refreshUpdate(int nWidth, int nHeight, double dWorldTLX, double dWorldTLY, double dWorldBRX, double dWorldBRY) {
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int completado = file.getPercentComplete(); |
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System.out.println("EcwFile: se actualiza 1: "+completado+" % completado");
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if ((updatable != null) && (lastRefreshPercent < 100)) {
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if ((completado-lastRefreshPercent > 25) || completado == 100) {
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lastRefreshPercent = file.getPercentComplete(); |
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updatable.repaint(); |
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} |
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} |
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} |
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public void refreshUpdate(int nWidth, int nHeight, int dDatasetTLX, int dDatasetTLY, int dDatasetBRX, int dDatasetBRY) {
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System.out.println("EcwFile: se actualiza 2");
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} |
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} |
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