| /* |
| * Copyright (c) 1997, 2011, Oracle and/or its affiliates. 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.java2d.pipe; |
| |
| import java.awt.BasicStroke; |
| import java.awt.Rectangle; |
| import java.awt.Shape; |
| import java.awt.geom.Rectangle2D; |
| import java.awt.geom.PathIterator; |
| import sun.awt.SunHints; |
| import 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, ParallelogramPipe |
| { |
| 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 Rectangle2D computeBBox(double ux1, double uy1, |
| double ux2, double uy2) |
| { |
| if ((ux2 -= ux1) < 0) { |
| ux1 += ux2; |
| ux2 = -ux2; |
| } |
| if ((uy2 -= uy1) < 0) { |
| uy1 += uy2; |
| uy2 = -uy2; |
| } |
| return new Rectangle2D.Double(ux1, uy1, ux2, uy2); |
| } |
| |
| public void fillParallelogram(SunGraphics2D sg, |
| double ux1, double uy1, |
| double ux2, double uy2, |
| double x, double y, |
| double dx1, double dy1, |
| double dx2, double dy2) |
| { |
| Region clip = sg.getCompClip(); |
| int abox[] = new int[4]; |
| AATileGenerator aatg = |
| renderengine.getAATileGenerator(x, y, dx1, dy1, dx2, dy2, 0, 0, |
| clip, abox); |
| if (aatg == null) { |
| // Nothing to render |
| return; |
| } |
| |
| renderTiles(sg, computeBBox(ux1, uy1, ux2, uy2), aatg, abox); |
| } |
| |
| public void drawParallelogram(SunGraphics2D sg, |
| double ux1, double uy1, |
| double ux2, double uy2, |
| double x, double y, |
| double dx1, double dy1, |
| double dx2, double dy2, |
| double lw1, double lw2) |
| { |
| Region clip = sg.getCompClip(); |
| int abox[] = new int[4]; |
| AATileGenerator aatg = |
| renderengine.getAATileGenerator(x, y, dx1, dy1, dx2, dy2, lw1, lw2, |
| clip, abox); |
| if (aatg == null) { |
| // Nothing to render |
| return; |
| } |
| |
| // Note that bbox is of the original shape, not the wide path. |
| // This is appropriate for handing to Paint methods... |
| renderTiles(sg, computeBBox(ux1, uy1, ux2, uy2), aatg, abox); |
| } |
| |
| 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); |
| |
| 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; |
| } |
| |
| renderTiles(sg, s, aatg, abox); |
| } |
| |
| public void renderTiles(SunGraphics2D sg, Shape s, |
| AATileGenerator aatg, int abox[]) |
| { |
| Object context = null; |
| byte alpha[] = null; |
| 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); |
| } |
| } |
| } |
| } |