/*
* Copyright 1997-2007 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 ae.sun.java2d.pipe;
import ae.java.awt.BasicStroke;
import ae.java.awt.Rectangle;
import ae.java.awt.Shape;
import ae.java.awt.geom.PathIterator;
import ae.sun.awt.SunHints;
import ae.sun.java2d.SunGraphics2D;
/**
* This class is used to convert raw geometry into 8-bit alpha tiles
* using an AATileGenerator for application by the next stage of
* the pipeline.
* This class sets up the Generator and computes the alpha tiles
* and then passes them on to a CompositePipe object for painting.
*/
public class AAShapePipe implements ShapeDrawPipe {
static RenderingEngine renderengine = RenderingEngine.getInstance();
CompositePipe outpipe;
public AAShapePipe(CompositePipe pipe) {
outpipe = pipe;
}
public void draw(SunGraphics2D sg, Shape s) {
BasicStroke bs;
if (sg.stroke instanceof BasicStroke) {
bs = (BasicStroke) sg.stroke;
} else {
s = sg.stroke.createStrokedShape(s);
bs = null;
}
renderPath(sg, s, bs);
}
public void fill(SunGraphics2D sg, Shape s) {
renderPath(sg, s, null);
}
private static byte[] theTile;
public synchronized static byte[] getAlphaTile(int len) {
byte[] t = theTile;
if (t == null || t.length < len) {
t = new byte[len];
} else {
theTile = null;
}
return t;
}
public synchronized static void dropAlphaTile(byte[] t) {
theTile = t;
}
public void renderPath(SunGraphics2D sg, Shape s, BasicStroke bs) {
boolean adjust = (bs != null &&
sg.strokeHint != SunHints.INTVAL_STROKE_PURE);
boolean thin = (sg.strokeState <= sg.STROKE_THINDASHED);
Object context = null;
byte alpha[] = null;
Region clip = sg.getCompClip();
int abox[] = new int[4];
AATileGenerator aatg =
renderengine.getAATileGenerator(s, sg.transform, clip,
bs, thin, adjust, abox);
if (aatg == null) {
// Nothing to render
return;
}
try {
context = outpipe.startSequence(sg, s,
new Rectangle(abox[0], abox[1],
abox[2] - abox[0],
abox[3] - abox[1]),
abox);
int tw = aatg.getTileWidth();
int th = aatg.getTileHeight();
alpha = getAlphaTile(tw * th);
byte[] atile;
for (int y = abox[1]; y < abox[3]; y += th) {
for (int x = abox[0]; x < abox[2]; x += tw) {
int w = Math.min(tw, abox[2] - x);
int h = Math.min(th, abox[3] - y);
int a = aatg.getTypicalAlpha();
if (a == 0x00 ||
outpipe.needTile(context, x, y, w, h) == false)
{
aatg.nextTile();
outpipe.skipTile(context, x, y);
continue;
}
if (a == 0xff) {
atile = null;
aatg.nextTile();
} else {
atile = alpha;
aatg.getAlpha(alpha, 0, tw);
}
outpipe.renderPathTile(context, atile, 0, tw,
x, y, w, h);
}
}
} finally {
aatg.dispose();
if (context != null) {
outpipe.endSequence(context);
}
if (alpha != null) {
dropAlphaTile(alpha);
}
}
}
}