--- /dev/null
+/* ColorPaintContext.java -- context for painting solid colors
+ Copyright (C) 2002, 2004, 2005 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;
+
+import java.awt.image.ColorModel;
+import java.awt.image.Raster;
+
+/**
+ * This class provides a paint context which will fill a rectanglar region of
+ * a raster scan with the given color. However, it is not yet completely
+ * implemented.
+ *
+ * @author Eric Blake (ebb9@email.byu.edu)
+ */
+class ColorPaintContext implements PaintContext
+{
+ /**
+ * The color to fill any raster with. Package visible for use in
+ * SystemColor.
+ */
+ final int color;
+ final ColorModel colorModel;
+
+ private ColorRaster cachedRaster;
+
+
+ /**
+ * Create the context for a given color.
+ *
+ * @param c The solid color to use.
+ */
+ ColorPaintContext(int colorRGB)
+ {
+ this(ColorModel.getRGBdefault(), colorRGB);
+ }
+
+ /**
+ * Create the context for a given color.
+ *
+ * @param cm The color model of this context.
+ * @param c The solid color to use.
+ */
+ ColorPaintContext(ColorModel cm,int colorRGB)
+ {
+ color = colorRGB;
+ colorModel = cm;
+ }
+
+ /**
+ * Release the resources allocated for the paint. As the color is constant,
+ * there aren't any resources.
+ */
+ public void dispose()
+ {
+ }
+
+ /**
+ * Return the color model of this context.
+ *
+ * @return the context color model
+ */
+ public ColorModel getColorModel()
+ {
+ return colorModel;
+ }
+
+ /**
+ * Return a raster containing the colors for the graphics operation.
+ *
+ * @param x the x-coordinate, in device space
+ * @param y the y-coordinate, in device space
+ * @param width the width, in device space
+ * @param height the height, in device space
+ * @return a raster for the given area and color
+ */
+ public Raster getRaster(int x, int y, int width, int height)
+ {
+ if( cachedRaster == null
+ || cachedRaster.getWidth() < width
+ || cachedRaster.getHeight() < height)
+ {
+ cachedRaster = new ColorRaster(colorModel, 0, 0, width, height, color);
+ }
+ return cachedRaster.createChild(0 ,0 ,width ,height ,x ,y , null);
+ }
+
+ /**
+ * A ColorRaster is a raster that is completely filled with one color. The
+ * data layout is taken from the color model given to the constructor.
+ */
+ private class ColorRaster extends Raster
+ {
+
+ /**
+ * Create a raster that is compaltible with the given color model and
+ * filled with the given color.
+ * @param cm The color model for this raster.
+ * @param x The smallest horizontal corrdinate in the raster.
+ * @param y The smallest vertical coordinate in the raster.
+ * @param width The width of the raster.
+ * @param height The height of the raster.
+ * @param rgbPixel The RGB value of the color for this raster.
+ */
+ ColorRaster(ColorModel cm,int x, int y, int width, int height, int rgbPixel)
+ {
+ super(cm.createCompatibleSampleModel(width,height),new Point(x,y));
+ Object pixel = cm.getDataElements(rgbPixel,null);
+ getSampleModel().setDataElements(0, 0,
+ width, height,
+ multiplyData(pixel,null,width*height),
+ dataBuffer);
+ }
+
+
+
+ private Object multiplyData(Object src, Object dest, int factor)
+ {
+ Object from;
+ int srcLength = 0;
+ if (src instanceof byte[])
+ {
+ srcLength = ((byte[])src).length;
+
+ if (dest == null) dest = new byte[factor * srcLength];
+ }
+ else if (src instanceof short[])
+ {
+ srcLength = ((short[])src).length;
+ if (dest == null) dest = new short[factor * srcLength];
+ }
+ else if (src instanceof int[])
+ {
+ srcLength = ((int[]) src).length;
+ if (dest == null) dest = new int[factor * srcLength];
+ }
+ else
+ {
+ throw new ClassCastException("Unknown data buffer type");
+ }
+
+ System.arraycopy(src,0,dest,0,srcLength);
+
+ int count = 1;
+ while(count*2 < factor)
+ {
+ System.arraycopy(dest, 0, dest, count * srcLength, count*srcLength);
+ count *= 2;
+ }
+
+ if(factor > count)
+ System.arraycopy(dest,0, dest, count * srcLength,
+ (factor - count) * srcLength );
+
+ return dest;
+ }
+
+ }
+
+} // class ColorPaintContext
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