root / trunk / libraries / libRaster / src / org / gvsig / raster / grid / render / ImageDrawer.java @ 37962
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/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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*
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* Copyright (C) 2006 IVER T.I. and Generalitat Valenciana.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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*/
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package org.gvsig.raster.grid.render; |
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import java.awt.Image; |
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import java.awt.image.BufferedImage; |
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import org.gvsig.raster.buffer.RasterBuffer; |
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import org.gvsig.raster.dataset.IBuffer; |
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import org.gvsig.raster.grid.GridTransparency; |
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import org.gvsig.raster.process.RasterTask; |
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import org.gvsig.raster.process.RasterTaskQueue; |
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import org.gvsig.raster.util.Cancellable; |
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/**
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* Objeto para la escritura de datos desde un buffer a un objeto Image. En este nivel de
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* renderizado no se gestiona extents, ni rotaciones ni coordenadas del mundo, solo la
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* escritura desde un buffer hasta otro de tama?o dado. Por medio de par?metros y de objetos
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* de estado varia el resultado de la escritura, selecci?n de bandas a escribir desde el buffer
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* a RGB, transparencias aplicadas o paletas.
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*
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* @author Nacho Brodin (nachobrodin@gmail.com)
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*/
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public class ImageDrawer { |
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/**
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* Fuente de datos para el renderizado
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*/
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private IBuffer rasterBuf = null; |
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private double[] step = null; |
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/**
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* Ancho y alto del objeto image
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*/
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private int width = 0; |
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private int height = 0; |
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private Rendering rendering = null; |
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public ImageDrawer(Rendering rendering) {
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this.rendering = rendering;
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} |
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/**
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* Dibuja el buffer sobre un objeto Image de java.awt y devuelve el resultado.
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*
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* @param replicateBand Flag de comportamiento del renderizado. Al renderizar el buffer
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* este obtiene la primera banda del buffer y la asigna al R, la segunda al G y la tercera
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* al B. Este flag no es tomado en cuenta en caso de que existan 3 bandas en el buffer.
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* Si no hay tres bandas, por ejemplo una y el flag es true esta ser? replicada
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* en R, G y B, en caso de ser false la banda ser? dibujada en su posici?n (R, G o B)
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* y en las otras bandas se rellenar? con 0.
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* @param cancel
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*
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* @param transparentBand. Si es true la banda 4 es alpha y si es false no lo es.
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*
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* @return java.awt.Image con el buffer dibujado.
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* @throws InterruptedException
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*/
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public Image drawBufferOverImageObject(boolean replicateBand, int[] renderBands, Cancellable cancel) throws InterruptedException { |
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if (rasterBuf == null || width == 0 || height == 0) |
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return null; |
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BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB); |
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// Dibujado de raster de 1 o 2 bandas.
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// adaptBufferToRender(replicateBand, renderBands);
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if (rasterBuf.getDataType() != IBuffer.TYPE_BYTE)
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rasterBuf = convertToByte(rasterBuf); |
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// Asigna la banda de transparencia si existe esta.
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// assignTransparencyBand(renderBands);
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byte[] data = new byte[rasterBuf.getBandCount()]; |
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GridTransparency transparency = rendering.getLastTransparency(); |
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if (transparency != null && transparency.isTransparencyActive()) { |
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if (transparency.existAlphaBand() &&
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transparency.getAlphaBand() != null &&
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(transparency.getAlphaBand().getDataType() != IBuffer.TYPE_BYTE)) |
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transparency.setAlphaBand(convertToByte(transparency.getAlphaBand())); |
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drawWithTransparency(image, data, (step != null), cancel);
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} else
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drawByte(image, data, (step != null), cancel);
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step = null;
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return image;
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} |
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/**
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* Calcula los vectores de desplazamiento en pixels en X e Y cuando se supersamplea.
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* @param r Array de desplazamientos para las filas. Debe tener espacio reservado
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* @param c Array de desplazamientos para las columnas. Debe tener espacio reservado
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* cargados.
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*/
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private void calcSupersamplingStepsArrays(int[] r, int[] c) { |
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double pos = step[1]; |
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for(int row = 0; row < r.length; row ++) { |
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r[row] = (int)(pos / step[3]); |
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pos ++; |
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} |
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pos = step[0];
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for(int col = 0; col < c.length; col ++) { |
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c[col] = (int)(pos / step[2]); |
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pos ++; |
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} |
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} |
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/**
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* Dibuja un raster sobre un BufferedImage
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* @param image BufferedImage sobre el que se dibuja
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* @param data buffer vacio. Se trata de un array de bytes donde cada elemento representa una banda.
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* @param supersampling true si se necesita supersamplear y false si no se necesita
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* @throws InterruptedException
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*/
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private void drawByte(BufferedImage image, byte[] data, boolean supersampling, Cancellable cancel) throws InterruptedException { |
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RasterTask task = RasterTaskQueue.get(Thread.currentThread().toString());
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if (supersampling) {
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int[] r = new int[height]; |
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int[] c = new int[width]; |
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calcSupersamplingStepsArrays(r, c); |
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for (int row = 0; row < height; row++) { |
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if (cancel.isCanceled())
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return;
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for (int col = 0; col < width; col++) { |
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try {
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rasterBuf.getElemByte(r[row], c[col], data); |
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image.setRGB(col, row, (0xff000000 + ((data[0] & 0xff) << 16) |
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+ ((data[1] & 0xff) << 8) + (data[2] & 0xff))); |
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} catch (ArrayIndexOutOfBoundsException e) { |
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System.err.println("== Size Image:" + image.getWidth() + " " + image.getHeight()); |
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System.err.println("== Position required:" + col + " " + row); |
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break;
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} |
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} |
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if (task.getEvent() != null) |
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task.manageEvent(task.getEvent()); |
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} |
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} else {
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for (int row = 0; row < rasterBuf.getHeight(); row++) { |
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if (row % 200 == 0) |
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if (cancel.isCanceled())
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return;
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for (int col = 0; col < rasterBuf.getWidth(); col++) { |
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try {
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rasterBuf.getElemByte(row, col, data); |
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image.setRGB(col, row, (0xff000000 + ((data[0] & 0xff) << 16) |
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+ ((data[1] & 0xff) << 8) + (data[2] & 0xff))); |
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} catch (ArrayIndexOutOfBoundsException ex) { |
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System.err.println("== Size Image:" + image.getWidth() + " " + image.getHeight()); |
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System.err.println("== Position required:" + col + " " + row); |
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break;
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} |
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} |
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if (task.getEvent() != null) |
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task.manageEvent(task.getEvent()); |
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} |
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} |
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} |
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/**
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* Dibuja un raster sobre un BufferedImage con las propiedades de paleta y transparencia
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* @param image BufferedImage sobre el que se dibuja
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* @param data buffer vacio. Se trata de un array de bytes donde cada elemento representa una banda.
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* @param supersampling true si se necesita supersamplear y false si no se necesita
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* @param cancel
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* @throws InterruptedException
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*/
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private void drawWithTransparency(BufferedImage image, byte[] data, boolean supersampling, Cancellable cancel) throws InterruptedException { |
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RasterTask task = RasterTaskQueue.get(Thread.currentThread().toString());
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int value = 0; |
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GridTransparency transparency = rendering.getLastTransparency(); |
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// try {
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if (supersampling) {
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int[] r = new int[height]; |
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int[] c = new int[width]; |
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calcSupersamplingStepsArrays(r, c); |
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for (int row = 0; row < height; row++) { |
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if (cancel.isCanceled())
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return;
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for (int col = 0; col < width; col++) { |
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try {
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rasterBuf.getElemByte(r[row], c[col], data); |
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value = transparency.processRGB(data[0] & 0xff, data[1] & 0xff, data[2] & 0xff, r[row], c[col]); |
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image.setRGB(col, row, value); |
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} catch (ArrayIndexOutOfBoundsException e) { |
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System.err.println("== Size Image:" + image.getWidth() + " " + image.getHeight()); |
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System.err.println("== Position required:" + col + " " + row); |
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break;
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} |
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} |
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if (task.getEvent() != null) |
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task.manageEvent(task.getEvent()); |
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} |
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} else {
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for (int row = 0; row < rasterBuf.getHeight(); row++) { |
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if (cancel.isCanceled())
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return;
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for (int col = 0; col < rasterBuf.getWidth(); col++) { |
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try {
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rasterBuf.getElemByte(row, col, data); |
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value = transparency.processRGB(data[0] & 0xff, data[1] & 0xff, data[2] & 0xff, row, col); |
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image.setRGB(col, row, value); |
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} catch (ArrayIndexOutOfBoundsException e) { |
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System.err.println("== Size Image:" + image.getWidth() + " " + image.getHeight()); |
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System.err.println("== Position required:" + col + " " + row); |
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break;
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} |
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} |
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if (task.getEvent() != null) |
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task.manageEvent(task.getEvent()); |
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} |
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} |
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// } finally {
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// Quitamos el uso del free para no invocar al garbage collector en numerosas
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// iteraciones
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// transparency.free();
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// }
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} |
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/**
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* Intercala bandas en el buffer dependiendo de si hay que replicar o meter
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* bandas en negro. Esto tiene es valido para buffers con solo una banda ya que
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* el dibujado sobre Graphics debe ser R, G, B.
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*
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* @param replicateBand false si no se replican bandas y las que no existen
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* se ponen en negro y false si hay que dibujar la misma en R,G y B. Esto
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* tiene sentido si el raster tiene solo 1 o 2 bandas.
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* @param renderBands array con las posiciones de renderizado.
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* A la hora de renderizar hay que tener en cuenta que solo se renderizan las
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* tres primeras bandas del buffer por lo que solo se tienen en cuenta los tres primeros
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* elementos. Por ejemplo, el array {1, 0, 3} dibujar? sobre el Graphics las bandas 1,0 y 3 de un
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* raster de al menos 4 bandas.La notaci?n con -1 en alguna posici?n del vector solo tiene sentido
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* en la visualizaci?n pero no se puede as?gnar una banda del buffer a null.
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* Algunos ejemplos:
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* <P>
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* {-1, 0, -1} Dibuja la banda 0 del raster en la G de la visualizaci?n.
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* Si replicateBand es true R = G = B sino R = B = 0
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* {1, 0, 3} La R = banda 1 del raster, G = 0 y B = 3
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* {0} La R = banda 0 del raster. Si replicateBand es true R = G = B sino G = B = 0
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* </P>
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*/
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/*private void adaptBufferToRender(boolean replicateBand, int[] renderBands){
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byte[][] aux = null;
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if(rasterBuf.getBandCount() < 3){
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for(int i = 0; i < renderBands.length; i++){
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if( replicateBand && renderBands[i] == -1)
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rasterBuf.replicateBand(0, i);
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if( !replicateBand && renderBands[i] == -1){
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if(aux == null)
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aux = rasterBuf.createByteBand(rasterBuf.getWidth(), rasterBuf.getHeight(), (byte)0);
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rasterBuf.addBandByte(i, aux);
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}
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}
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}
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}*/
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/**
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* Asigna al objeto GridTransparency la banda de transparencia si la tiene para
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* tenerla en cuenta en el renderizado.
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* @param renderBands Lista de bandas a renderizar
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* @param ts Objeto con las propiedades de transparencia del Grid.
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*/
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/*private void assignTransparencyBand(int[] renderBands) {
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if(transparency != null){
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for(int i = 0; i < transparency.getTransparencyBandNumberList().size(); i ++) {
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for(int j = 0; j < renderBands.length; j ++) {
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if(renderBands[j] == ((Integer)transparency.getTransparencyBandNumberList().get(i)).intValue()){
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if(transparency.getBand() == null)
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transparency.setBand(rasterBuf.getBandBuffer(renderBands[j]));
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else {
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IBuffer outBuf = transparency.getBand().cloneBuffer();
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transparency.mergeTransparencyBands(new IBuffer[]{transparency.getBand(), rasterBuf.getBandBuffer(renderBands[j])}, outBuf);
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}
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}
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}
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}
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}
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}*/
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private IBuffer convertToByte(IBuffer buf) throws InterruptedException { |
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IBuffer b = RasterBuffer.getBuffer(IBuffer.TYPE_BYTE, buf.getWidth(), buf.getHeight(), buf.getBandCount(), true);
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if(buf.getDataType() == IBuffer.TYPE_SHORT) {
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for (int nBand = 0; nBand < buf.getBandCount(); nBand++) |
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for (int row = 0; row < buf.getHeight(); row++) |
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for (int col = 0; col < buf.getWidth(); col++) |
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b.setElem(row, col, nBand, (byte)(buf.getElemShort(row, col, nBand) & 0xffff)); |
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} |
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if(buf.getDataType() == IBuffer.TYPE_INT) {
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for (int nBand = 0; nBand < buf.getBandCount(); nBand++) |
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for (int row = 0; row < buf.getHeight(); row++) |
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for (int col = 0; col < buf.getWidth(); col++) |
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b.setElem(row, col, nBand, (byte)(buf.getElemInt(row, col, nBand) & 0xffffffff)); |
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} |
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if(buf.getDataType() == IBuffer.TYPE_FLOAT) {
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for (int nBand = 0; nBand < buf.getBandCount(); nBand++) |
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for (int row = 0; row < buf.getHeight(); row++) |
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for (int col = 0; col < buf.getWidth(); col++) |
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b.setElem(row, col, nBand, (byte)(Math.round(buf.getElemFloat(row, col, nBand)))); |
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} |
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if(buf.getDataType() == IBuffer.TYPE_DOUBLE) {
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for (int nBand = 0; nBand < buf.getBandCount(); nBand++) |
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for (int row = 0; row < buf.getHeight(); row++) |
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for (int col = 0; col < buf.getWidth(); col++) |
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b.setElem(row, col, nBand, (byte)(Math.round(buf.getElemDouble(row, col, nBand)))); |
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} |
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return b;
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} |
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/**
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* Asigna el buffer a renderizar
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* @param b Buffer a renderizar
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*/
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public void setBuffer(IBuffer b) { |
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this.rasterBuf = b;
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} |
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/**
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* Asigna la paleta asociada al grid
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* @param palette
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*/
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/*public void setPalette(GridPalette palette) {
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this.palette = palette;
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}*/
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/**
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* Asigna el desplazamiento en pixeles desde la esquina superior izquierda. Si es null se considera que esta
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* funci?n la ha hecho el driver quedando desactivada en el renderizador. Si es as? no debe variar el resultado
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* en la visualizacion.
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* Si Supersamplea el renderizador se cargar? una matriz de datos 1:1 por lo que se podr? aplicar un filtro
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* a este buffer de datos leidos independientemente del zoom que tengamos.
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* @param step Desplazamiento
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*/
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public void setStep(double[] step) { |
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this.step = step;
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} |
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/**
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* Asigna el ancho y el alto del BufferedImage. Esto es util para cuando hay supersampling
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* que el tama?o del objeto Image no coincide con el buffer con los datos raster.
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* @param w Ancho
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* @param h Alto
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*/
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public void setBufferSize(int w, int h) { |
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this.width = w;
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this.height = h;
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} |
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} |