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/* * @(#)RenderableImageProducer.java 1.12 05/11/17 * * Copyright 2006 Sun Microsystems, Inc. All rights reserved. * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. */ /* ******************************************************************** ********************************************************************** ********************************************************************** *** COPYRIGHT (c) Eastman Kodak Company, 1997 *** *** As an unpublished work pursuant to Title 17 of the United *** *** States Code. All rights reserved. *** ********************************************************************** ********************************************************************** **********************************************************************/ package java.awt.image.renderable; import java.awt.color.ColorSpace; import java.awt.image.ColorModel; import java.awt.image.DataBuffer; import java.awt.image.DirectColorModel; import java.awt.image.ImageConsumer; import java.awt.image.ImageProducer; import java.awt.image.Raster; import java.awt.image.RenderedImage; import java.awt.image.SampleModel; import java.util.Enumeration; import java.util.Vector; /** * An adapter class that implements ImageProducer to allow the * asynchronous production of a RenderableImage. The size of the * ImageConsumer is determined by the scale factor of the usr2dev * transform in the RenderContext. If the RenderContext is null, the * default rendering of the RenderableImage is used. This class * implements an asynchronous production that produces the image in * one thread at one resolution. This class may be subclassed to * implement versions that will render the image using several * threads. These threads could render either the same image at * progressively better quality, or different sections of the image at * a single resolution. */ public class RenderableImageProducer implements ImageProducer, Runnable { /** The RenderableImage source for the producer. */ RenderableImage rdblImage; /** The RenderContext to use for producing the image. */ RenderContext rc; /** A Vector of image consumers. */ Vector ics = new Vector(); /** * Constructs a new RenderableImageProducer from a RenderableImage * and a RenderContext. * * @param rdblImage the RenderableImage to be rendered. * @param rc the RenderContext to use for producing the pixels. */ public RenderableImageProducer(RenderableImage rdblImage, RenderContext rc) { this.rdblImage = rdblImage; this.rc = rc; } /** * Sets a new RenderContext to use for the next startProduction() call. * * @param rc the new RenderContext. */ public synchronized void setRenderContext(RenderContext rc) { this.rc = rc; } /** * Adds an ImageConsumer to the list of consumers interested in * data for this image. * * @param ic an ImageConsumer to be added to the interest list. */ public synchronized void addConsumer(ImageConsumer ic) { if (!ics.contains(ic)) { ics.addElement(ic); } } /** * Determine if an ImageConsumer is on the list of consumers * currently interested in data for this image. * * @param ic the ImageConsumer to be checked. * @return true if the ImageConsumer is on the list; false otherwise. */ public synchronized boolean isConsumer(ImageConsumer ic) { return ics.contains(ic); } /** * Remove an ImageConsumer from the list of consumers interested in * data for this image. * * @param ic the ImageConsumer to be removed. */ public synchronized void removeConsumer(ImageConsumer ic) { ics.removeElement(ic); } /** * Adds an ImageConsumer to the list of consumers interested in * data for this image, and immediately starts delivery of the * image data through the ImageConsumer interface. * * @param ic the ImageConsumer to be added to the list of consumers. */ public synchronized void startProduction(ImageConsumer ic) { addConsumer(ic); // Need to build a runnable object for the Thread. Thread thread = new Thread(this, "RenderableImageProducer Thread"); thread.start(); } /** * Requests that a given ImageConsumer have the image data delivered * one more time in top-down, left-right order. * * @param ic the ImageConsumer requesting the resend. */ public void requestTopDownLeftRightResend(ImageConsumer ic) { // So far, all pixels are already sent in TDLR order } /** * The runnable method for this class. This will produce an image using * the current RenderableImage and RenderContext and send it to all the * ImageConsumer currently registered with this class. */ public void run() { // First get the rendered image RenderedImage rdrdImage; if (rc != null) { rdrdImage = rdblImage.createRendering(rc); } else { rdrdImage = rdblImage.createDefaultRendering(); } // And its ColorModel ColorModel colorModel = rdrdImage.getColorModel(); Raster raster = rdrdImage.getData(); SampleModel sampleModel = raster.getSampleModel(); DataBuffer dataBuffer = raster.getDataBuffer(); if (colorModel == null) { colorModel = ColorModel.getRGBdefault(); } int minX = raster.getMinX(); int minY = raster.getMinY(); int width = raster.getWidth(); int height = raster.getHeight(); Enumeration icList; ImageConsumer ic; // Set up the ImageConsumers icList = ics.elements(); while (icList.hasMoreElements()) { ic = (ImageConsumer)icList.nextElement(); ic.setDimensions(width,height); ic.setHints(ImageConsumer.TOPDOWNLEFTRIGHT | ImageConsumer.COMPLETESCANLINES | ImageConsumer.SINGLEPASS | ImageConsumer.SINGLEFRAME); } // Get RGB pixels from the raster scanline by scanline and // send to consumers. int pix[] = new int[width]; int i,j; int numBands = sampleModel.getNumBands(); int tmpPixel[] = new int[numBands]; for (j = 0; j < height; j++) { for(i = 0; i < width; i++) { sampleModel.getPixel(i, j, tmpPixel, dataBuffer); pix[i] = colorModel.getDataElement(tmpPixel, 0); } // Now send the scanline to the Consumers icList = ics.elements(); while (icList.hasMoreElements()) { ic = (ImageConsumer)icList.nextElement(); ic.setPixels(0, j, width, 1, colorModel, pix, 0, width); } } // Now tell the consumers we're done. icList = ics.elements(); while (icList.hasMoreElements()) { ic = (ImageConsumer)icList.nextElement(); ic.imageComplete(ImageConsumer.STATICIMAGEDONE); } } }