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261 lines
9.0 KiB
Java
261 lines
9.0 KiB
Java
/*
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* Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package sun.java2d.pipe;
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import java.awt.BasicStroke;
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import java.awt.Rectangle;
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import java.awt.Shape;
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import java.awt.geom.Rectangle2D;
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import sun.awt.SunHints;
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import sun.java2d.ReentrantContext;
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import sun.java2d.ReentrantContextProvider;
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import sun.java2d.ReentrantContextProviderTL;
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import sun.java2d.SunGraphics2D;
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/**
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* This class is used to convert raw geometry into 8-bit alpha tiles
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* using an AATileGenerator for application by the next stage of
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* the pipeline.
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* This class sets up the Generator and computes the alpha tiles
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* and then passes them on to a CompositePipe object for painting.
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*/
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public final class AAShapePipe
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implements ShapeDrawPipe, ParallelogramPipe
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{
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static final RenderingEngine RDR_ENGINE = RenderingEngine.getInstance();
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// Per-thread TileState (~1K very small so do not use any Weak Reference)
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private static final ReentrantContextProvider<TileState> TILE_STATE_PROVIDER =
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new ReentrantContextProviderTL<TileState>(
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ReentrantContextProvider.REF_HARD)
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{
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@Override
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protected TileState newContext() {
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return new TileState();
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}
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};
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final CompositePipe outpipe;
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public AAShapePipe(CompositePipe pipe) {
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outpipe = pipe;
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}
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@Override
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public void draw(SunGraphics2D sg, Shape s) {
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final BasicStroke bs;
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if (sg.stroke instanceof BasicStroke) {
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bs = (BasicStroke) sg.stroke;
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} else {
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s = sg.stroke.createStrokedShape(s);
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bs = null;
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}
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renderPath(sg, s, bs);
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}
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@Override
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public void fill(SunGraphics2D sg, Shape s) {
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renderPath(sg, s, null);
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}
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@Override
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public void fillParallelogram(SunGraphics2D sg,
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double ux1, double uy1,
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double ux2, double uy2,
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double x, double y,
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double dx1, double dy1,
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double dx2, double dy2)
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{
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final TileState ts = TILE_STATE_PROVIDER.acquire();
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try {
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final int[] abox = ts.abox;
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final AATileGenerator aatg =
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RDR_ENGINE.getAATileGenerator(x, y, dx1, dy1, dx2, dy2, 0, 0,
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sg.getCompClip(), abox);
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if (aatg != null) {
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renderTiles(sg, ts.computeBBox(ux1, uy1, ux2, uy2),
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aatg, abox, ts);
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}
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} finally {
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TILE_STATE_PROVIDER.release(ts);
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}
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}
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@Override
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public void drawParallelogram(SunGraphics2D sg,
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double ux1, double uy1,
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double ux2, double uy2,
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double x, double y,
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double dx1, double dy1,
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double dx2, double dy2,
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double lw1, double lw2)
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{
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final TileState ts = TILE_STATE_PROVIDER.acquire();
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try {
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final int[] abox = ts.abox;
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final AATileGenerator aatg =
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RDR_ENGINE.getAATileGenerator(x, y, dx1, dy1, dx2, dy2, lw1,
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lw2, sg.getCompClip(), abox);
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if (aatg != null) {
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// Note that bbox is of the original shape, not the wide path.
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// This is appropriate for handing to Paint methods...
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renderTiles(sg, ts.computeBBox(ux1, uy1, ux2, uy2),
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aatg, abox, ts);
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}
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} finally {
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TILE_STATE_PROVIDER.release(ts);
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}
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}
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public void renderPath(SunGraphics2D sg, Shape s, BasicStroke bs) {
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final boolean adjust = (bs != null &&
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sg.strokeHint != SunHints.INTVAL_STROKE_PURE);
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final boolean thin = (sg.strokeState <= SunGraphics2D.STROKE_THINDASHED);
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final TileState ts = TILE_STATE_PROVIDER.acquire();
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try {
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final int[] abox = ts.abox;
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final AATileGenerator aatg =
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RDR_ENGINE.getAATileGenerator(s, sg.transform, sg.getCompClip(),
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bs, thin, adjust, abox);
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if (aatg != null) {
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renderTiles(sg, s, aatg, abox, ts);
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}
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} finally {
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TILE_STATE_PROVIDER.release(ts);
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}
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}
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public void renderTiles(SunGraphics2D sg, Shape s,
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final AATileGenerator aatg,
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final int[] abox, final TileState ts)
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{
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Object context = null;
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try {
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// reentrance: outpipe may also use AAShapePipe:
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context = outpipe.startSequence(sg, s,
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ts.computeDevBox(abox),
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abox);
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// copy of int[] abox as local variables for performance:
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final int x0 = abox[0];
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final int y0 = abox[1];
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final int x1 = abox[2];
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final int y1 = abox[3];
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final int tw = aatg.getTileWidth();
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final int th = aatg.getTileHeight();
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// get tile from thread local storage:
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final byte[] alpha = ts.getAlphaTile(tw * th);
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byte[] atile;
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for (int y = y0; y < y1; y += th) {
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final int h = Math.min(th, y1 - y);
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for (int x = x0; x < x1; x += tw) {
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final int w = Math.min(tw, x1 - x);
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final int a = aatg.getTypicalAlpha();
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if (a == 0x00 || !outpipe.needTile(context, x, y, w, h)) {
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aatg.nextTile();
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outpipe.skipTile(context, x, y);
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continue;
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}
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if (a == 0xff) {
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atile = null;
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aatg.nextTile();
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} else {
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atile = alpha;
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aatg.getAlpha(alpha, 0, tw);
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}
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outpipe.renderPathTile(context, atile, 0, tw, x, y, w, h);
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}
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}
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} finally {
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aatg.dispose();
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if (context != null) {
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outpipe.endSequence(context);
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}
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}
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}
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// Tile state used by AAShapePipe
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static final class TileState extends ReentrantContext {
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// cached tile (32 x 32 tile by default)
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private byte[] theTile = new byte[32 * 32];
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// dirty aabox array
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final int[] abox = new int[4];
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// dirty bbox rectangle
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private final Rectangle dev = new Rectangle();
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// dirty bbox rectangle2D.Double
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private final Rectangle2D.Double bbox2D = new Rectangle2D.Double();
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byte[] getAlphaTile(int len) {
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byte[] t = theTile;
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if (t.length < len) {
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// create a larger tile and may free current theTile (too small)
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theTile = t = new byte[len];
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}
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return t;
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}
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Rectangle computeDevBox(final int[] abox) {
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final Rectangle box = this.dev;
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box.x = abox[0];
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box.y = abox[1];
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box.width = abox[2] - abox[0];
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box.height = abox[3] - abox[1];
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return box;
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}
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Rectangle2D computeBBox(double ux1, double uy1,
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double ux2, double uy2)
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{
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if ((ux2 -= ux1) < 0.0) {
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ux1 += ux2;
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ux2 = -ux2;
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}
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if ((uy2 -= uy1) < 0.0) {
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uy1 += uy2;
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uy2 = -uy2;
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}
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final Rectangle2D.Double box = this.bbox2D;
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box.x = ux1;
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box.y = uy1;
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box.width = ux2;
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box.height = uy2;
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return box;
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}
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}
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}
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