| /* |
| * Copyright (c) 1997, 2016, 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 sun.awt.SunHints; |
| import sun.java2d.ReentrantContext; |
| import sun.java2d.ReentrantContextProvider; |
| import sun.java2d.ReentrantContextProviderTL; |
| 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 final class AAShapePipe |
| implements ShapeDrawPipe, ParallelogramPipe |
| { |
| static final RenderingEngine RDR_ENGINE = RenderingEngine.getInstance(); |
| |
| // Per-thread TileState (~1K very small so do not use any Weak Reference) |
| private static final ReentrantContextProvider<TileState> TILE_STATE_PROVIDER = |
| new ReentrantContextProviderTL<TileState>( |
| ReentrantContextProvider.REF_HARD) |
| { |
| @Override |
| protected TileState newContext() { |
| return new TileState(); |
| } |
| }; |
| |
| final CompositePipe outpipe; |
| |
| public AAShapePipe(CompositePipe pipe) { |
| outpipe = pipe; |
| } |
| |
| @Override |
| public void draw(SunGraphics2D sg, Shape s) { |
| final BasicStroke bs; |
| |
| if (sg.stroke instanceof BasicStroke) { |
| bs = (BasicStroke) sg.stroke; |
| } else { |
| s = sg.stroke.createStrokedShape(s); |
| bs = null; |
| } |
| |
| renderPath(sg, s, bs); |
| } |
| |
| @Override |
| public void fill(SunGraphics2D sg, Shape s) { |
| renderPath(sg, s, null); |
| } |
| |
| @Override |
| 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) |
| { |
| final TileState ts = TILE_STATE_PROVIDER.acquire(); |
| try { |
| final int[] abox = ts.abox; |
| |
| final AATileGenerator aatg = |
| RDR_ENGINE.getAATileGenerator(x, y, dx1, dy1, dx2, dy2, 0, 0, |
| sg.getCompClip(), abox); |
| if (aatg != null) { |
| renderTiles(sg, ts.computeBBox(ux1, uy1, ux2, uy2), |
| aatg, abox, ts); |
| } |
| } finally { |
| TILE_STATE_PROVIDER.release(ts); |
| } |
| } |
| |
| @Override |
| 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) |
| { |
| final TileState ts = TILE_STATE_PROVIDER.acquire(); |
| try { |
| final int[] abox = ts.abox; |
| |
| final AATileGenerator aatg = |
| RDR_ENGINE.getAATileGenerator(x, y, dx1, dy1, dx2, dy2, lw1, |
| lw2, sg.getCompClip(), abox); |
| if (aatg != null) { |
| // Note that bbox is of the original shape, not the wide path. |
| // This is appropriate for handing to Paint methods... |
| renderTiles(sg, ts.computeBBox(ux1, uy1, ux2, uy2), |
| aatg, abox, ts); |
| } |
| } finally { |
| TILE_STATE_PROVIDER.release(ts); |
| } |
| } |
| |
| public void renderPath(SunGraphics2D sg, Shape s, BasicStroke bs) { |
| final boolean adjust = (bs != null && |
| sg.strokeHint != SunHints.INTVAL_STROKE_PURE); |
| final boolean thin = (sg.strokeState <= SunGraphics2D.STROKE_THINDASHED); |
| |
| final TileState ts = TILE_STATE_PROVIDER.acquire(); |
| try { |
| final int[] abox = ts.abox; |
| |
| final AATileGenerator aatg = |
| RDR_ENGINE.getAATileGenerator(s, sg.transform, sg.getCompClip(), |
| bs, thin, adjust, abox); |
| if (aatg != null) { |
| renderTiles(sg, s, aatg, abox, ts); |
| } |
| } finally { |
| TILE_STATE_PROVIDER.release(ts); |
| } |
| } |
| |
| public void renderTiles(SunGraphics2D sg, Shape s, |
| final AATileGenerator aatg, |
| final int[] abox, final TileState ts) |
| { |
| Object context = null; |
| try { |
| // reentrance: outpipe may also use AAShapePipe: |
| context = outpipe.startSequence(sg, s, |
| ts.computeDevBox(abox), |
| abox); |
| |
| // copy of int[] abox as local variables for performance: |
| final int x0 = abox[0]; |
| final int y0 = abox[1]; |
| final int x1 = abox[2]; |
| final int y1 = abox[3]; |
| |
| final int tw = aatg.getTileWidth(); |
| final int th = aatg.getTileHeight(); |
| |
| // get tile from thread local storage: |
| final byte[] alpha = ts.getAlphaTile(tw * th); |
| byte[] atile; |
| |
| for (int y = y0; y < y1; y += th) { |
| final int h = Math.min(th, y1 - y); |
| |
| for (int x = x0; x < x1; x += tw) { |
| final int w = Math.min(tw, x1 - x); |
| |
| final int a = aatg.getTypicalAlpha(); |
| |
| if (a == 0x00 || !outpipe.needTile(context, x, y, w, h)) { |
| 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); |
| } |
| } |
| } |
| |
| // Tile state used by AAShapePipe |
| static final class TileState extends ReentrantContext { |
| // cached tile (32 x 32 tile by default) |
| private byte[] theTile = new byte[32 * 32]; |
| // dirty aabox array |
| final int[] abox = new int[4]; |
| // dirty bbox rectangle |
| private final Rectangle dev = new Rectangle(); |
| // dirty bbox rectangle2D.Double |
| private final Rectangle2D.Double bbox2D = new Rectangle2D.Double(); |
| |
| byte[] getAlphaTile(int len) { |
| byte[] t = theTile; |
| if (t.length < len) { |
| // create a larger tile and may free current theTile (too small) |
| theTile = t = new byte[len]; |
| } |
| return t; |
| } |
| |
| Rectangle computeDevBox(final int[] abox) { |
| final Rectangle box = this.dev; |
| box.x = abox[0]; |
| box.y = abox[1]; |
| box.width = abox[2] - abox[0]; |
| box.height = abox[3] - abox[1]; |
| return box; |
| } |
| |
| Rectangle2D computeBBox(double ux1, double uy1, |
| double ux2, double uy2) |
| { |
| if ((ux2 -= ux1) < 0.0) { |
| ux1 += ux2; |
| ux2 = -ux2; |
| } |
| if ((uy2 -= uy1) < 0.0) { |
| uy1 += uy2; |
| uy2 = -uy2; |
| } |
| final Rectangle2D.Double box = this.bbox2D; |
| box.x = ux1; |
| box.y = uy1; |
| box.width = ux2; |
| box.height = uy2; |
| return box; |
| } |
| } |
| } |
