| /* RenderableImageProducer.java -- |
| Copyright (C) 2002, 2006 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| |
| package java.awt.image.renderable; |
| |
| import java.awt.image.ColorModel; |
| import java.awt.image.DataBuffer; |
| 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.ArrayList; |
| import java.util.Iterator; |
| |
| public class RenderableImageProducer implements ImageProducer, Runnable |
| { |
| private RenderableImage image; |
| private RenderContext context; |
| private ArrayList consumers = new ArrayList(); |
| |
| public RenderableImageProducer(RenderableImage image, RenderContext context) |
| { |
| this.image = image; |
| this.context = context; |
| } |
| |
| public void setRenderContext(RenderContext context) |
| { |
| this.context = context; |
| } |
| |
| public void addConsumer(ImageConsumer consumer) |
| { |
| synchronized (consumers) |
| { |
| if (! consumers.contains(consumer)) |
| consumers.add(consumer); |
| } |
| } |
| |
| public boolean isConsumer(ImageConsumer consumer) |
| { |
| synchronized (consumers) |
| { |
| return consumers.contains(consumer); |
| } |
| } |
| |
| public void removeConsumer(ImageConsumer consumer) |
| { |
| synchronized (consumers) |
| { |
| consumers.remove(consumer); |
| } |
| } |
| |
| public void startProduction(ImageConsumer consumer) |
| { |
| addConsumer(consumer); |
| Thread t = new Thread(this, "RenderableImageProducerWorker"); |
| t.start(); |
| } |
| |
| public void requestTopDownLeftRightResend(ImageConsumer consumer) |
| { |
| // Do nothing. The contract says we can ignore this call, so we do. |
| } |
| |
| public void run() |
| { |
| // This isn't ideal but it avoids fail-fast problems. |
| // Alternatively, we could clone 'consumers' here. |
| synchronized (consumers) |
| { |
| RenderedImage newImage; |
| if (context == null) |
| newImage = image.createDefaultRendering(); |
| else |
| newImage = image.createRendering(context); |
| Raster newData = newImage.getData(); |
| ColorModel colorModel = newImage.getColorModel(); |
| if (colorModel == null) |
| colorModel = ColorModel.getRGBdefault(); |
| SampleModel sampleModel = newData.getSampleModel(); |
| DataBuffer dataBuffer = newData.getDataBuffer(); |
| int width = newData.getWidth(); |
| int height = newData.getHeight(); |
| |
| // Initialize the consumers. |
| Iterator it = consumers.iterator(); |
| while (it.hasNext()) |
| { |
| ImageConsumer target = (ImageConsumer) it.next(); |
| target.setHints(ImageConsumer.COMPLETESCANLINES |
| | ImageConsumer.SINGLEFRAME |
| | ImageConsumer.SINGLEPASS |
| | ImageConsumer.TOPDOWNLEFTRIGHT); |
| target.setDimensions(width, height); |
| } |
| |
| // Work in scan-line order. |
| int[] newLine = new int[width]; |
| int[] bands = new int[sampleModel.getNumBands()]; |
| for (int y = 0; y < height; ++y) |
| { |
| for (int x = 0; x < width; ++x) |
| { |
| sampleModel.getPixel(x, y, bands, dataBuffer); |
| newLine[x] = colorModel.getDataElement(bands, 0); |
| } |
| |
| // Tell the consumers about the new scan line. |
| it = consumers.iterator(); |
| while (it.hasNext()) |
| { |
| ImageConsumer target = (ImageConsumer) it.next(); |
| target.setPixels(0, y, width, 1, colorModel, newLine, 0, width); |
| } |
| } |
| |
| // Tell the consumers that we're done. |
| it = consumers.iterator(); |
| while (it.hasNext()) |
| { |
| ImageConsumer target = (ImageConsumer) it.next(); |
| target.imageComplete(ImageConsumer.STATICIMAGEDONE); |
| } |
| } |
| } |
| } // class RenderableImageProducer |