jdk/src/share/classes/sun/java2d/pipe/AlphaColorPipe.java

/*
 * Copyright 1997-1999 Sun Microsystems, Inc.  All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Sun designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Sun in the LICENSE file that accompanied this code.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 */

package sun.java2d.pipe;

import java.awt.Rectangle;
import java.awt.Shape;
import sun.java2d.SunGraphics2D;

/**
 * This class implements a CompositePipe that renders path alpha tiles
 * into a destination that supports direct alpha compositing of a solid
 * color, according to one of the rules in the AlphaComposite class.
 */
public class AlphaColorPipe implements CompositePipe {
    public AlphaColorPipe() {
    }

    public Object startSequence(SunGraphics2D sg, Shape s, Rectangle dev,
                                int[] abox) {
        return sg;
    }

    public boolean needTile(Object context, int x, int y, int w, int h) {
        return true;
    }

    public void renderPathTile(Object context,
                               byte[] atile, int offset, int tilesize,
                               int x, int y, int w, int h) {
        SunGraphics2D sg = (SunGraphics2D) context;

        sg.alphafill.MaskFill(sg, sg.getSurfaceData(), sg.composite,
                              x, y, w, h,
                              atile, offset, tilesize);
    }

    public void skipTile(Object context, int x, int y) {
        return;
    }

    public void endSequence(Object context) {
        return;
    }
}