--- /dev/null
+/* MemoryImageSource.java -- Java class for providing image data
+ Copyright (C) 1999, 2004 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;
+
+import java.util.Hashtable;
+import java.util.Vector;
+
+public class MemoryImageSource implements ImageProducer
+{
+ private boolean animated = false;
+ private boolean fullbuffers = false;
+ private int[] pixeli;
+ private int width;
+ private int height;
+ private int offset;
+ private int scansize;
+ private byte[] pixelb;
+ private ColorModel cm;
+ private Hashtable props = new Hashtable();
+ private Vector consumers = new Vector();
+
+ /**
+ * Construct an image producer that reads image data from a byte
+ * array.
+ *
+ * @param w width of image
+ * @param h height of image
+ * @param cm the color model used to represent pixel values
+ * @param pix a byte array of pixel values
+ * @param off the offset into the array at which the first pixel is stored
+ * @param scan the number of array elements that represents a single pixel row
+ */
+ public MemoryImageSource(int w, int h, ColorModel cm, byte[] pix, int off,
+ int scan)
+ {
+ this(w, h, cm, pix, off, scan, null);
+ }
+
+ /**
+ * Constructs an ImageProducer from memory
+ */
+ public MemoryImageSource(int w, int h, ColorModel cm, byte[] pix, int off,
+ int scan, Hashtable props)
+ {
+ width = w;
+ height = h;
+ this.cm = cm;
+ offset = off;
+ scansize = scan;
+ this.props = props;
+ int max = ((scansize > width) ? scansize : width);
+ pixelb = pix;
+ }
+
+ /**
+ * Construct an image producer that reads image data from an
+ * integer array.
+ *
+ * @param w width of image
+ * @param h height of image
+ * @param cm the color model used to represent pixel values
+ * @param pix an integer array of pixel values
+ * @param off the offset into the array at which the first pixel is stored
+ * @param scan the number of array elements that represents a single pixel row
+ */
+ public MemoryImageSource(int w, int h, ColorModel cm, int[] pix, int off,
+ int scan)
+ {
+ this(w, h, cm, pix, off, scan, null);
+ }
+
+ /**
+ Constructs an ImageProducer from memory
+ */
+ public MemoryImageSource(int w, int h, ColorModel cm, int[] pix, int off,
+ int scan, Hashtable props)
+ {
+ width = w;
+ height = h;
+ this.cm = cm;
+ offset = off;
+ scansize = scan;
+ this.props = props;
+ int max = ((scansize > width) ? scansize : width);
+ pixeli = pix;
+ }
+
+ /**
+ * Constructs an ImageProducer from memory using the default RGB ColorModel
+ */
+ public MemoryImageSource(int w, int h, int[] pix, int off, int scan,
+ Hashtable props)
+ {
+ this(w, h, ColorModel.getRGBdefault(), pix, off, scan, props);
+ }
+
+ /**
+ * Constructs an ImageProducer from memory using the default RGB ColorModel
+ */
+ public MemoryImageSource(int w, int h, int[] pix, int off, int scan)
+ {
+ this(w, h, ColorModel.getRGBdefault(), pix, off, scan, null);
+ }
+
+ /**
+ * Used to register an <code>ImageConsumer</code> with this
+ * <code>ImageProducer</code>.
+ */
+ public synchronized void addConsumer(ImageConsumer ic)
+ {
+ if (consumers.contains(ic))
+ return;
+
+ consumers.addElement(ic);
+ }
+
+ /**
+ * Used to determine if the given <code>ImageConsumer</code> is
+ * already registered with this <code>ImageProducer</code>.
+ */
+ public synchronized boolean isConsumer(ImageConsumer ic)
+ {
+ if (consumers.contains(ic))
+ return true;
+ return false;
+ }
+
+ /**
+ * Used to remove an <code>ImageConsumer</code> from the list of
+ * registered consumers for this <code>ImageProducer</code>.
+ */
+ public synchronized void removeConsumer(ImageConsumer ic)
+ {
+ consumers.removeElement(ic);
+ }
+
+ /**
+ * Used to register an <code>ImageConsumer</code> with this
+ * <code>ImageProducer</code> and then immediately start
+ * reconstruction of the image data to be delivered to all
+ * registered consumers.
+ */
+ public void startProduction(ImageConsumer ic)
+ {
+ if (! (consumers.contains(ic)))
+ consumers.addElement(ic);
+
+ Vector list = (Vector) consumers.clone();
+ for (int i = 0; i < list.size(); i++)
+ {
+ ic = (ImageConsumer) list.elementAt(i);
+ sendPicture(ic);
+ if (animated)
+ ic.imageComplete(ImageConsumer.SINGLEFRAME);
+ else
+ ic.imageComplete(ImageConsumer.STATICIMAGEDONE);
+ }
+ }
+
+ /**
+ * Used to register an <code>ImageConsumer</code> with this
+ * <code>ImageProducer</code> and then request that this producer
+ * resend the image data in the order top-down, left-right.
+ */
+ public void requestTopDownLeftRightResend(ImageConsumer ic)
+ {
+ startProduction(ic);
+ }
+
+ /**
+ * Changes a flag to indicate whether this MemoryImageSource supports
+ * animations.
+ *
+ * @param animated A flag indicating whether this class supports animations
+ */
+ public synchronized void setAnimated(boolean animated)
+ {
+ this.animated = animated;
+ }
+
+ /**
+ * A flag to indicate whether or not to send full buffer updates when
+ * sending animation. If this flag is set then full buffers are sent
+ * in the newPixels methods instead of just regions.
+ *
+ * @param fullbuffers - a flag indicating whether to send the full buffers
+ */
+ public synchronized void setFullBufferUpdates(boolean fullbuffers)
+ {
+ this.fullbuffers = fullbuffers;
+ }
+
+ /**
+ * Send an animation frame to the image consumers.
+ */
+ public void newPixels()
+ {
+ if (animated == true)
+ {
+ ImageConsumer ic;
+ Vector list = (Vector) consumers.clone();
+ for (int i = 0; i < list.size(); i++)
+ {
+ ic = (ImageConsumer) list.elementAt(i);
+ sendPicture(ic);
+ ic.imageComplete(ImageConsumer.SINGLEFRAME);
+ }
+ }
+ }
+
+ private void sendPicture(ImageConsumer ic)
+ {
+ ic.setHints(ImageConsumer.TOPDOWNLEFTRIGHT);
+ if (props != null)
+ ic.setProperties(props);
+ ic.setDimensions(width, height);
+ ic.setColorModel(cm);
+ if (pixeli != null)
+ ic.setPixels(0, 0, width, height, cm, pixeli, offset, scansize);
+ else
+ ic.setPixels(0, 0, width, height, cm, pixelb, offset, scansize);
+ }
+
+ /**
+ * Send an animation frame to the image consumers containing the specified
+ * pixels unless setFullBufferUpdates is set.
+ */
+ public synchronized void newPixels(int x, int y, int w, int h)
+ {
+ if (animated == true)
+ {
+ if (fullbuffers)
+ newPixels();
+ else
+ {
+ ImageConsumer ic;
+ Vector list = (Vector) consumers.clone();
+ for (int i = 0; i < list.size(); i++)
+ {
+ ic = (ImageConsumer) list.elementAt(i);
+ ic.setHints(ImageConsumer.TOPDOWNLEFTRIGHT);
+ if (props != null)
+ ic.setProperties(props);
+ if (pixeli != null)
+ {
+ int[] pixelbuf = new int[w * h];
+ for (int row = y; row < y + h; row++)
+ System.arraycopy(pixeli, row * scansize + x + offset,
+ pixelbuf, 0, w * h);
+ ic.setPixels(x, y, w, h, cm, pixelbuf, 0, w);
+ }
+ else
+ {
+ byte[] pixelbuf = new byte[w * h];
+ for (int row = y; row < y + h; row++)
+ System.arraycopy(pixelb, row * scansize + x + offset,
+ pixelbuf, 0, w * h);
+
+ ic.setPixels(x, y, w, h, cm, pixelbuf, 0, w);
+ }
+ ic.imageComplete(ImageConsumer.SINGLEFRAME);
+ }
+ }
+ }
+ }
+
+ /**
+ * Send an animation frame to the image consumers containing the specified
+ * pixels unless setFullBufferUpdates is set.
+ *
+ * If framenotify is set then a notification is sent when the frame
+ * is sent otherwise no status is sent.
+ */
+ public synchronized void newPixels(int x, int y, int w, int h,
+ boolean framenotify)
+ {
+ if (animated == true)
+ {
+ if (fullbuffers)
+ newPixels();
+ else
+ {
+ ImageConsumer ic;
+ Vector list = (Vector) consumers.clone();
+ for (int i = 0; i < list.size(); i++)
+ {
+ ic = (ImageConsumer) list.elementAt(i);
+ ic.setHints(ImageConsumer.TOPDOWNLEFTRIGHT);
+ if (props != null)
+ ic.setProperties(props);
+ if (pixeli != null)
+ {
+ int[] pixelbuf = new int[w * h];
+ for (int row = y; row < y + h; row++)
+ System.arraycopy(pixeli, row * scansize + x + offset,
+ pixelbuf, 0, w * h);
+ ic.setPixels(x, y, w, h, cm, pixelbuf, 0, w);
+ }
+ else
+ {
+ byte[] pixelbuf = new byte[w * h];
+ for (int row = y; row < y + h; row++)
+ System.arraycopy(pixelb, row * scansize + x + offset,
+ pixelbuf, 0, w * h);
+ ic.setPixels(x, y, w, h, cm, pixelbuf, 0, w);
+ }
+ if (framenotify == true)
+ ic.imageComplete(ImageConsumer.SINGLEFRAME);
+ }
+ }
+ }
+ }
+
+ public synchronized void newPixels(byte[] newpix, ColorModel newmodel,
+ int offset, int scansize)
+ {
+ pixeli = null;
+ pixelb = newpix;
+ cm = newmodel;
+ this.offset = offset;
+ this.scansize = scansize;
+ if (animated == true)
+ newPixels();
+ }
+
+ public synchronized void newPixels(int[] newpix, ColorModel newmodel,
+ int offset, int scansize)
+ {
+ pixelb = null;
+ pixeli = newpix;
+ cm = newmodel;
+ this.offset = offset;
+ this.scansize = scansize;
+ if (animated == true)
+ newPixels();
+ }
+}
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