Application: gvSIG desktop » gvSIG raster

package org.gvsig.raster.cache.buffer.impl.memory;

import java.io.IOException;

import junit.framework.TestCase;

import org.gvsig.jgdal.GdalException;

import org.gvsig.raster.cache.buffer.Band;

import org.gvsig.raster.cache.buffer.Buffer;

import org.gvsig.raster.cache.buffer.exception.OperationNotSupportedException;

import org.gvsig.raster.cache.buffer.impl.io.GdalRead;

import org.gvsig.raster.cache.buffer.impl.io.GdalWrite;

import org.gvsig.raster.cache.buffer.impl.memory.RasterMemoryBuffer;

/**

 * This test add a band in a raster of 3 bands. As a result of this test a raster

 * of four bands is created and saved in the hard disk. The value of additional band

 * is zero in all its elements. Finally it gets the band added and compare each values 

 * with 0. 

 *  

 * @author Nacho Brodin (nachobrodin@gmail.com)

 */

public class TestAddBand extends TestCase {

        private String rasterIn = "./src/test/resources/image/001m09_1_0.tif";

        private String rasterOut = "/tmp/out-4bands.tif";

        public void start() {

                this.setUp();

                this.testStack();

        }

        public void setUp() {

                System.err.println("MemoryBuffer TestAddBand running...");

        }

        public void testStack() {

                long t1 = System.currentTimeMillis();

                GdalRead input = null;

                GdalWrite out = null;

                try {

                        //Read input data

                        input = new GdalRead(rasterIn);

                        Object dataIn = input.readBlock(0, 0, input.getWidth(), input.getHeight());

                        //Create Buffer

                        Buffer buf = new RasterMemoryBuffer(input.getRasterBufTypeFromGdalType(input.getDataType()), 

                                                                                                                input.getWidth(), 

                                                                                                                input.getHeight(),

                                                                                                                input.getBandCount(),

                                                                                                                true);

                        //Set data to buffer

                        setLines(dataIn, buf);

                        buf.addBand(1);

                        //Write output file 

                        out = new GdalWrite(rasterOut, 4, input.getDataType(), input.getWidth(), input.getHeight(), GdalWrite.COLOR_INTERP_GRAY);

                        out.writeBands(buf.getBands());

                        out.close();        

                        Band band = buf.getBand(1);

                        for (int i = 0; i < band.getHeight(); i++) {

                                for (int j = 0; j < band.getWidth(); j++) {

                                        byte b = band.getElemByte(i, j);

                                        assertEquals(0, b);

                                }

                        }

                        buf.free();

                } catch (GdalException e) {

                        e.printStackTrace();

                } catch (IOException e) {

                        e.printStackTrace();

                } catch (InterruptedException e) {

                        e.printStackTrace();

                }  catch (OperationNotSupportedException e) {

                        e.printStackTrace();

                }

                long t2 = System.currentTimeMillis();

                System.out.println("Tiempo MemoryBuffer TestAddBand: " + (t2 - t1) + " milisegundos");

        }

        private void setLines(Object dataIn, Buffer buf) throws OperationNotSupportedException {

                if(dataIn instanceof byte[][][]) {

                    byte[][][] d = (byte[][][])dataIn;

                    for (int iBand = 0; iBand < d.length; iBand++) {

                                for (int row = 0; row < d[iBand].length; row++) {

                                        buf.setLineInBandByte(d[iBand][row], row, iBand);

                                }

                        }

            }

        }

}