J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2007 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.AlphaComposite; |
| 29 | import java.awt.Composite; |
| 30 | import sun.java2d.SurfaceData; |
| 31 | import sun.java2d.loops.Blit; |
| 32 | import sun.java2d.loops.CompositeType; |
| 33 | import sun.java2d.loops.MaskBlit; |
| 34 | import sun.java2d.loops.SurfaceType; |
| 35 | import static sun.java2d.pipe.BufferedOpCodes.*; |
| 36 | |
| 37 | /** |
| 38 | * The MaskBlit operation is expressed as: |
| 39 | * dst = ((src <MODE> dst) * pathA) + (dst * (1 - pathA)) |
| 40 | * |
| 41 | * The OGL/D3D implementation of the MaskBlit operation differs from the above |
| 42 | * equation because it is not possible to perform such a complex operation in |
| 43 | * OpenGL/Direct3D (without the use of advanced techniques like fragment |
| 44 | * shaders and multitexturing). Therefore, the BufferedMaskBlit operation |
| 45 | * is expressed as: |
| 46 | * dst = (src * pathA) <SrcOver> dst |
| 47 | * |
| 48 | * This simplified formula is only equivalent to the "true" MaskBlit equation |
| 49 | * in the following situations: |
| 50 | * - <MODE> is SrcOver |
| 51 | * - <MODE> is Src, extra alpha == 1.0, and the source surface is opaque |
| 52 | * |
| 53 | * Therefore, we register BufferedMaskBlit primitives for only the SurfaceType |
| 54 | * and CompositeType restrictions mentioned above. In addition for the Src |
| 55 | * case, we must override the composite with a SrcOver (no extra alpha) |
| 56 | * instance, so that we set up the OpenGL/Direct3D blending mode to match the |
| 57 | * BufferedMaskBlit equation. |
| 58 | */ |
| 59 | public abstract class BufferedMaskBlit extends MaskBlit { |
| 60 | |
| 61 | private static final int ST_INT_ARGB = 0; |
| 62 | private static final int ST_INT_ARGB_PRE = 1; |
| 63 | private static final int ST_INT_RGB = 2; |
| 64 | private static final int ST_INT_BGR = 3; |
| 65 | |
| 66 | private final RenderQueue rq; |
| 67 | private final int srcTypeVal; |
| 68 | private Blit blitop; |
| 69 | |
| 70 | protected BufferedMaskBlit(RenderQueue rq, |
| 71 | SurfaceType srcType, |
| 72 | CompositeType compType, |
| 73 | SurfaceType dstType) |
| 74 | { |
| 75 | super(srcType, compType, dstType); |
| 76 | this.rq = rq; |
| 77 | if (srcType == SurfaceType.IntArgb) { |
| 78 | this.srcTypeVal = ST_INT_ARGB; |
| 79 | } else if (srcType == SurfaceType.IntArgbPre) { |
| 80 | this.srcTypeVal = ST_INT_ARGB_PRE; |
| 81 | } else if (srcType == SurfaceType.IntRgb) { |
| 82 | this.srcTypeVal = ST_INT_RGB; |
| 83 | } else if (srcType == SurfaceType.IntBgr) { |
| 84 | this.srcTypeVal = ST_INT_BGR; |
| 85 | } else { |
| 86 | throw new InternalError("unrecognized source surface type"); |
| 87 | } |
| 88 | } |
| 89 | |
| 90 | @Override |
| 91 | public void MaskBlit(SurfaceData src, SurfaceData dst, |
| 92 | Composite comp, Region clip, |
| 93 | int srcx, int srcy, |
| 94 | int dstx, int dsty, |
| 95 | int width, int height, |
| 96 | byte[] mask, int maskoff, int maskscan) |
| 97 | { |
| 98 | if (width <= 0 || height <= 0) { |
| 99 | return; |
| 100 | } |
| 101 | |
| 102 | if (mask == null) { |
| 103 | // no mask involved; delegate to regular blit loop |
| 104 | if (blitop == null) { |
| 105 | blitop = Blit.getFromCache(src.getSurfaceType(), |
| 106 | CompositeType.AnyAlpha, |
| 107 | this.getDestType()); |
| 108 | } |
| 109 | blitop.Blit(src, dst, |
| 110 | comp, clip, |
| 111 | srcx, srcy, dstx, dsty, |
| 112 | width, height); |
| 113 | return; |
| 114 | } |
| 115 | |
| 116 | AlphaComposite acomp = (AlphaComposite)comp; |
| 117 | if (acomp.getRule() != AlphaComposite.SRC_OVER) { |
| 118 | comp = AlphaComposite.SrcOver; |
| 119 | } |
| 120 | |
| 121 | rq.lock(); |
| 122 | try { |
| 123 | validateContext(dst, comp, clip); |
| 124 | |
| 125 | RenderBuffer buf = rq.getBuffer(); |
| 126 | int totalBytesRequired = 20 + (width * height * 4); |
| 127 | |
| 128 | /* |
| 129 | * REMIND: we should fix this so that it works with tiles that |
| 130 | * are larger than the entire buffer, but the native |
| 131 | * OGL/D3DMaskBlit isn't even prepared for tiles larger |
| 132 | * than 32x32 pixels, so there's no urgency here... |
| 133 | */ |
| 134 | rq.ensureCapacity(totalBytesRequired); |
| 135 | |
| 136 | // enqueue parameters and tile pixels |
| 137 | int newpos = enqueueTile(buf.getAddress(), buf.position(), |
| 138 | src, src.getNativeOps(), srcTypeVal, |
| 139 | mask, mask.length, maskoff, maskscan, |
| 140 | srcx, srcy, dstx, dsty, |
| 141 | width, height); |
| 142 | |
| 143 | buf.position(newpos); |
| 144 | } finally { |
| 145 | rq.unlock(); |
| 146 | } |
| 147 | } |
| 148 | |
| 149 | private native int enqueueTile(long buf, int bpos, |
| 150 | SurfaceData srcData, |
| 151 | long pSrcOps, int srcType, |
| 152 | byte[] mask, int masklen, |
| 153 | int maskoff, int maskscan, |
| 154 | int srcx, int srcy, int dstx, int dsty, |
| 155 | int width, int height); |
| 156 | |
| 157 | /** |
| 158 | * Validates the context state using the given destination surface |
| 159 | * and composite/clip values. |
| 160 | */ |
| 161 | protected abstract void validateContext(SurfaceData dstData, |
| 162 | Composite comp, Region clip); |
| 163 | } |