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Diffstat (limited to 'libjava/classpath/gnu/java/awt/GradientPaintContext.java')
| -rw-r--r-- | libjava/classpath/gnu/java/awt/GradientPaintContext.java | 164 |
1 files changed, 0 insertions, 164 deletions
diff --git a/libjava/classpath/gnu/java/awt/GradientPaintContext.java b/libjava/classpath/gnu/java/awt/GradientPaintContext.java deleted file mode 100644 index f33926c..0000000 --- a/libjava/classpath/gnu/java/awt/GradientPaintContext.java +++ /dev/null @@ -1,164 +0,0 @@ -/* GradientPaintContext.java -- - Copyright (C) 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 gnu.java.awt; - -import java.awt.geom.Point2D; -import java.awt.image.ColorModel; -import java.awt.image.Raster; -import java.awt.image.WritableRaster; -import java.awt.PaintContext; -import java.awt.Color; - -/** - * A {@link PaintContext} used by the {@link GradientPaint} class. - */ -public class GradientPaintContext implements PaintContext -{ - - // This implementation follows the technique described in - // "Java(tm) 2D Graphics" by Jonathan Knudsen (O'Reilly 1999). - - /** The x-coordinate of the anchor point for color 1. */ - private final float x1; - - /** The y-coordinate of the anchor point for color 1. */ - private final float y1; - - /** Color 1. */ - private final Color c1; - - /** The x-coordinate of the anchor point for color 2. */ - private final float x2; - - /** The y-coordinate of the anchor point for color 2. */ - private final float y2; - - /** Color 2. */ - private final Color c2; - - /** A flag indicating whether the gradient is cyclic or acyclic. */ - private final boolean cyclic; - - /** The length of the gradient line - computed from the two anchor points. */ - private final double length; - - /** - * Creates a new instance. - * - * @param x1 the x-coordinate for the anchor point for color 1. - * @param y1 the y-coordinate for the anchor point for color 1. - * @param c1 color 1. - * @param x2 the x-coordinate for the anchor point for color 2. - * @param y2 the y-coordinate for the anchor point for color 2. - * @param c2 color 2. - * @param cyclic a flag that determines whether the gradient is cyclic - * or acyclic. - */ - public GradientPaintContext(float x1, float y1, Color c1, - float x2, float y2, Color c2, boolean cyclic) - { - this.x1 = x1; - this.y1 = y1; - this.c1 = c1; - this.x2 = x2; - this.y2 = y2; - this.c2 = c2; - this.cyclic = cyclic; - length = Point2D.distance(x1, y1, x2, y2); - } - - /** - * Return the color model of this context. It may be different from the - * hint specified during createContext, as not all contexts can generate - * color patterns in an arbitrary model. - * - * @return the context color model - */ - public ColorModel getColorModel() - { - return ColorModel.getRGBdefault(); - } - - /** - * 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 w the width, in device space - * @param h the height, in device space - * @return a raster for the given area and color - */ - public Raster getRaster(int x, int y, int w, int h) { - ColorModel cm = getColorModel(); - WritableRaster raster = cm.createCompatibleWritableRaster(w, h); - int[] data = new int[w * h * 4]; - double pd2 = (x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2); - for (int r = 0; r < h; r++) { - for (int c = 0; c < w; c++) { - double u = 0.0; - if (pd2 != 0) - u = (((x + c) - x1) * (x2 - x1) + ((y + r) - y1) * (y2 - y1)) - / Math.sqrt(pd2); - double ratio = u / length; - if (cyclic) - ratio = Math.abs(ratio - Math.floor((ratio + 1.0) / 2.0) * 2.0); - else - ratio = Math.max(0.0, Math.min(1.0, ratio)); - int base = (r * w + c) * 4; - data[base] = (int) (c1.getRed() + ratio * (c2.getRed() - c1.getRed())); - data[base + 1] - = (int) (c1.getGreen() + ratio * (c2.getGreen() - c1.getGreen())); - data[base + 2] - = (int) (c1.getBlue() + ratio * (c2.getBlue() - c1.getBlue())); - data[base + 3] - = (int) (c1.getAlpha() + ratio * (c2.getAlpha() - c1.getAlpha())); - } - } - raster.setPixels(0, 0, w, h, data); - return raster; - } - - /** - * Release the resources allocated for the paint (none in this - * implementation). - */ - public void dispose() { - // nothing to do - } - -} |