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+/* PixmapVolatileImage.java -- VolatileImage implementation around a Pixmap
+ Copyright (C) 2007 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 gnu.java.awt.peer.x;
+
+import gnu.x11.GC;
+import gnu.x11.Pixmap;
+import gnu.x11.image.Image;
+import gnu.x11.image.ZPixmap;
+
+import java.awt.Graphics2D;
+import java.awt.GraphicsConfiguration;
+import java.awt.GraphicsEnvironment;
+import java.awt.ImageCapabilities;
+import java.awt.Point;
+import java.awt.Transparency;
+import java.awt.color.ColorSpace;
+import java.awt.image.BufferedImage;
+import java.awt.image.ColorModel;
+import java.awt.image.ComponentColorModel;
+import java.awt.image.ComponentSampleModel;
+import java.awt.image.DataBuffer;
+import java.awt.image.ImageObserver;
+import java.awt.image.Raster;
+import java.awt.image.SampleModel;
+import java.awt.image.VolatileImage;
+import java.awt.image.WritableRaster;
+
+/**
+ * A {@link VolatileImage} implementation that wraps an X Pixmap.
+ */
+class PixmapVolatileImage
+ extends VolatileImage
+{
+
+ /**
+ * The shared capabilities instance.
+ */
+ private static final ImageCapabilities caps = new ImageCapabilities(true);
+
+ /**
+ * The underlying pixmap.
+ */
+ private Pixmap pixmap;
+
+ /**
+ * Creates a new PixmapVolatileImage.
+ *
+ * @param w the width of the image
+ * @param h the height of the image
+ */
+ public PixmapVolatileImage(int w, int h)
+ {
+ GraphicsEnvironment env =
+ GraphicsEnvironment.getLocalGraphicsEnvironment();
+ XGraphicsDevice dev = (XGraphicsDevice) env.getDefaultScreenDevice();
+ pixmap = new Pixmap(dev.getDisplay(), w, h);
+
+ // Clear pixmap.
+ GC gc = new GC(pixmap);
+ gc.set_foreground(0xffffffff);
+ pixmap.fill_rectangle(gc, 0, 0, w, h);
+
+ }
+
+ @Override
+ public boolean contentsLost()
+ {
+ return false;
+ }
+
+ @Override
+ public Graphics2D createGraphics()
+ {
+ return new XGraphics2D(pixmap);
+ }
+
+ @Override
+ public ImageCapabilities getCapabilities()
+ {
+ return caps;
+ }
+
+ @Override
+ public int getHeight()
+ {
+ return pixmap.height;
+ }
+
+ @Override
+ public BufferedImage getSnapshot()
+ {
+ // TODO: Support non-24-bit resolutions.
+ int w = pixmap.width;
+ int h = pixmap.height;
+ ZPixmap zpixmap = (ZPixmap) pixmap.image(0, 0, w, h, 0xffffffff,
+ Image.Format.ZPIXMAP);
+ DataBuffer buffer = new ZPixmapDataBuffer(zpixmap);
+ SampleModel sm = new ComponentSampleModel(DataBuffer.TYPE_BYTE, w, h, 4,
+ w * 4,
+ new int[]{0, 1, 2, 3 });
+ ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_LINEAR_RGB);
+ ColorModel cm = new ComponentColorModel(cs, true, false,
+ Transparency.OPAQUE,
+ DataBuffer.TYPE_BYTE);
+ WritableRaster raster = Raster.createWritableRaster(sm, buffer,
+ new Point(0, 0));
+ return new BufferedImage(cm, raster, false, null);
+ }
+
+ @Override
+ public int getWidth()
+ {
+ return pixmap.width;
+ }
+
+ @Override
+ public int validate(GraphicsConfiguration gc)
+ {
+ // TODO: Check compatibility with gc.
+ return IMAGE_OK;
+ }
+
+ @Override
+ public int getHeight(ImageObserver observer)
+ {
+ return getHeight();
+ }
+
+ @Override
+ public Object getProperty(String name, ImageObserver observer)
+ {
+ return null;
+ }
+
+ @Override
+ public int getWidth(ImageObserver observer)
+ {
+ return getWidth();
+ }
+
+ /**
+ * Returns the underlying X pixmap. This is used for the graphics code.
+ *
+ * @return the underlying X pixmap
+ */
+ Pixmap getPixmap()
+ {
+ return pixmap;
+ }
+}