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| 1 | +/* | |
| 2 | + * Copyright (c) 2007, Oracle and/or its affiliates. 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. Oracle designates this | |
| 8 | + * particular file as subject to the "Classpath" exception as provided | |
| 9 | + * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 22 | + * or visit www.oracle.com if you need additional information or have any | |
| 23 | + * 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 | +} | |