J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1998-1999 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package sun.java2d.pipe; |
| 27 | |
| 28 | import java.awt.Rectangle; |
| 29 | import java.awt.Shape; |
| 30 | import java.awt.geom.PathIterator; |
| 31 | import sun.java2d.SunGraphics2D; |
| 32 | |
| 33 | /** |
| 34 | * This class uses a Region iterator to modify the extents of alpha |
| 35 | * tiles created during Shape rendering based upon a non-rectangular |
| 36 | * clipping path. |
| 37 | */ |
| 38 | public class SpanClipRenderer implements CompositePipe |
| 39 | { |
| 40 | CompositePipe outpipe; |
| 41 | |
| 42 | static Class RegionClass = Region.class; |
| 43 | static Class RegionIteratorClass = RegionIterator.class; |
| 44 | |
| 45 | static { |
| 46 | initIDs(RegionClass, RegionIteratorClass); |
| 47 | } |
| 48 | |
| 49 | static native void initIDs(Class rc, Class ric); |
| 50 | |
| 51 | public SpanClipRenderer(CompositePipe pipe) { |
| 52 | outpipe = pipe; |
| 53 | } |
| 54 | |
| 55 | class SCRcontext { |
| 56 | RegionIterator iterator; |
| 57 | Object outcontext; |
| 58 | int band[]; |
| 59 | byte tile[]; |
| 60 | |
| 61 | public SCRcontext(RegionIterator ri, Object outctx) { |
| 62 | iterator = ri; |
| 63 | outcontext = outctx; |
| 64 | band = new int[4]; |
| 65 | } |
| 66 | } |
| 67 | |
| 68 | public Object startSequence(SunGraphics2D sg, Shape s, Rectangle devR, |
| 69 | int[] abox) { |
| 70 | RegionIterator ri = sg.clipRegion.getIterator(); |
| 71 | |
| 72 | return new SCRcontext(ri, outpipe.startSequence(sg, s, devR, abox)); |
| 73 | } |
| 74 | |
| 75 | public boolean needTile(Object ctx, int x, int y, int w, int h) { |
| 76 | SCRcontext context = (SCRcontext) ctx; |
| 77 | return (outpipe.needTile(context.outcontext, x, y, w, h)); |
| 78 | } |
| 79 | |
| 80 | public void renderPathTile(Object ctx, |
| 81 | byte[] atile, int offset, int tsize, |
| 82 | int x, int y, int w, int h, |
| 83 | ShapeSpanIterator sr) { |
| 84 | renderPathTile(ctx, atile, offset, tsize, x, y, w, h); |
| 85 | } |
| 86 | |
| 87 | public void renderPathTile(Object ctx, |
| 88 | byte[] atile, int offset, int tsize, |
| 89 | int x, int y, int w, int h) { |
| 90 | SCRcontext context = (SCRcontext) ctx; |
| 91 | RegionIterator ri = context.iterator.createCopy(); |
| 92 | int[] band = context.band; |
| 93 | band[0] = x; |
| 94 | band[1] = y; |
| 95 | band[2] = x + w; |
| 96 | band[3] = y + h; |
| 97 | if (atile == null) { |
| 98 | int size = w * h; |
| 99 | atile = context.tile; |
| 100 | if (atile != null && atile.length < size) { |
| 101 | atile = null; |
| 102 | } |
| 103 | if (atile == null) { |
| 104 | atile = new byte[size]; |
| 105 | context.tile = atile; |
| 106 | } |
| 107 | offset = 0; |
| 108 | tsize = w; |
| 109 | fillTile(ri, atile, offset, tsize, band); |
| 110 | } else { |
| 111 | eraseTile(ri, atile, offset, tsize, band); |
| 112 | } |
| 113 | |
| 114 | if (band[2] > band[0] && band[3] > band[1]) { |
| 115 | offset += (band[1] - y) * tsize + (band[0] - x); |
| 116 | outpipe.renderPathTile(context.outcontext, |
| 117 | atile, offset, tsize, |
| 118 | band[0], band[1], |
| 119 | band[2] - band[0], |
| 120 | band[3] - band[1]); |
| 121 | } |
| 122 | } |
| 123 | |
| 124 | public native void fillTile(RegionIterator ri, |
| 125 | byte[] alpha, int offset, int tsize, |
| 126 | int[] band); |
| 127 | |
| 128 | public native void eraseTile(RegionIterator ri, |
| 129 | byte[] alpha, int offset, int tsize, |
| 130 | int[] band); |
| 131 | |
| 132 | public void skipTile(Object ctx, int x, int y) { |
| 133 | SCRcontext context = (SCRcontext) ctx; |
| 134 | outpipe.skipTile(context.outcontext, x, y); |
| 135 | } |
| 136 | |
| 137 | public void endSequence(Object ctx) { |
| 138 | SCRcontext context = (SCRcontext) ctx; |
| 139 | outpipe.endSequence(context.outcontext); |
| 140 | } |
| 141 | } |