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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.SunGraphics2D; | ||
| 31 | import sun.java2d.SurfaceData; | ||
| 32 | import sun.java2d.loops.CompositeType; | ||
| 33 | import sun.java2d.loops.MaskFill; | ||
| 34 | import sun.java2d.loops.SurfaceType; | ||
| 35 | import static sun.java2d.pipe.BufferedOpCodes.*; | ||
| 36 | |||
| 37 | /** | ||
| 38 | * The MaskFill operation is expressed as: | ||
| 39 | * dst = ((src <MODE> dst) * pathA) + (dst * (1 - pathA)) | ||
| 40 | * | ||
| 41 | * The OGL/D3D implementation of the MaskFill 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 BufferedMaskFill operation | ||
| 45 | * is expressed as: | ||
| 46 | * dst = (src * pathA) <SrcOver> dst | ||
| 47 | * | ||
| 48 | * This simplified formula is only equivalent to the "true" MaskFill equation | ||
| 49 | * in the following situations: | ||
| 50 | * - <MODE> is SrcOver | ||
| 51 | * - <MODE> is Src, extra alpha == 1.0, and the source paint is opaque | ||
| 52 | * | ||
| 53 | * Therefore, we register BufferedMaskFill primitives for only the SurfaceType | ||
| 54 | * and CompositeType restrictions mentioned above. In addition, for the | ||
| 55 | * SrcNoEa case we must override the incoming composite with a SrcOver (no | ||
| 56 | * extra alpha) instance, so that we set up the OpenGL/Direct3D blending | ||
| 57 | * mode to match the BufferedMaskFill equation. | ||
| 58 | */ | ||
| 59 | public abstract class BufferedMaskFill extends MaskFill { | ||
| 60 | |||
| 61 | protected final RenderQueue rq; | ||
| 62 | |||
| 63 | protected BufferedMaskFill(RenderQueue rq, | ||
| 64 | SurfaceType srcType, | ||
| 65 | CompositeType compType, | ||
| 66 | SurfaceType dstType) | ||
| 67 | { | ||
| 68 | super(srcType, compType, dstType); | ||
| 69 | this.rq = rq; | ||
| 70 | } | ||
| 71 | |||
| 72 | @Override | ||
| 73 | public void MaskFill(SunGraphics2D sg2d, SurfaceData sData, | ||
| 74 | Composite comp, | ||
| 75 | final int x, final int y, final int w, final int h, | ||
| 76 | final byte[] mask, | ||
| 77 | final int maskoff, final int maskscan) | ||
| 78 | { | ||
| 79 | AlphaComposite acomp = (AlphaComposite)comp; | ||
| 80 | if (acomp.getRule() != AlphaComposite.SRC_OVER) { | ||
| 81 | comp = AlphaComposite.SrcOver; | ||
| 82 | } | ||
| 83 | |||
| 84 | rq.lock(); | ||
| 85 | try { | ||
| 86 | validateContext(sg2d, comp, BufferedContext.USE_MASK); | ||
| 87 | |||
| 88 | // we adjust the mask length so that the mask ends on a | ||
| 89 | // 4-byte boundary | ||
| 90 | int maskBytesRequired; | ||
| 91 | if (mask != null) { | ||
| 92 | // we adjust the mask length so that the mask ends on a | ||
| 93 | // 4-byte boundary | ||
| 94 | maskBytesRequired = (mask.length + 3) & (~3); | ||
| 95 | } else { | ||
| 96 | // mask not needed | ||
| 97 | maskBytesRequired = 0; | ||
| 98 | } | ||
| 99 | int totalBytesRequired = 32 + maskBytesRequired; | ||
| 100 | |||
| 101 | RenderBuffer buf = rq.getBuffer(); | ||
| 102 | if (totalBytesRequired <= buf.capacity()) { | ||
| 103 | if (totalBytesRequired > buf.remaining()) { | ||
| 104 | // process the queue first and then enqueue the mask | ||
| 105 | rq.flushNow(); | ||
| 106 | } | ||
| 107 | |||
| 108 | buf.putInt(MASK_FILL); | ||
| 109 | // enqueue parameters | ||
| 110 | buf.putInt(x).putInt(y).putInt(w).putInt(h); | ||
| 111 | buf.putInt(maskoff); | ||
| 112 | buf.putInt(maskscan); | ||
| 113 | buf.putInt(maskBytesRequired); | ||
| 114 | if (mask != null) { | ||
| 115 | // enqueue the mask | ||
| 116 | int padding = maskBytesRequired - mask.length; | ||
| 117 | buf.put(mask); | ||
| 118 | if (padding != 0) { | ||
| 119 | buf.position(buf.position() + padding); | ||
| 120 | } | ||
| 121 | } | ||
| 122 | } else { | ||
| 123 | // queue is too small to accomodate entire mask; perform | ||
| 124 | // the operation directly on the queue flushing thread | ||
| 125 | rq.flushAndInvokeNow(new Runnable() { | ||
| 126 | public void run() { | ||
| 127 | maskFill(x, y, w, h, | ||
| 128 | maskoff, maskscan, mask.length, mask); | ||
| 129 | } | ||
| 130 | }); | ||
| 131 | } | ||
| 132 | } finally { | ||
| 133 | rq.unlock(); | ||
| 134 | } | ||
| 135 | } | ||
| 136 | |||
| 137 | /** | ||
| 138 | * Called as a separate Runnable when the operation is too large to fit | ||
| 139 | * on the RenderQueue. The OGL/D3D pipelines each have their own (small) | ||
| 140 | * native implementation of this method. | ||
| 141 | */ | ||
| 142 | protected abstract void maskFill(int x, int y, int w, int h, | ||
| 143 | int maskoff, int maskscan, int masklen, | ||
| 144 | byte[] mask); | ||
| 145 | |||
| 146 | /** | ||
| 147 | * Validates the state in the provided SunGraphics2D object and sets up | ||
| 148 | * any special resources for this operation (e.g. enabling gradient | ||
| 149 | * shading). | ||
| 150 | */ | ||
| 151 | protected abstract void validateContext(SunGraphics2D sg2d, | ||
| 152 | Composite comp, int ctxflags); | ||
| 153 | } | ||