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downloading a git-generated archive based on the 'upstream' tag
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1 files changed, 195 insertions, 0 deletions

diff --git a/libjava/classpath/java/awt/ColorPaintContext.java b/libjava/classpath/java/awt/ColorPaintContext.java
new file mode 100644
index 000000000..5ba688617
--- /dev/null
+++ b/libjava/classpath/java/awt/ColorPaintContext.java
@@ -0,0 +1,195 @@
+/* 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 colorRGB 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 colorRGB 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 ,0 ,0 , 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);
+      int[] pixelComps = cm.getComponents(pixel, null, 0);
+      int[] d = (int[]) multiplyData(pixelComps,null,width*height);
+      getSampleModel().setPixels(0, 0, width, height, d,
+                                 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